/usr/share/cpl-plugins/vimos-3.1.7/dic/ESO-DFS-DIC.VIMOS_QC is in cpl-plugin-vimos 3.1.7+dfsg-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 | # "$Id: ESO-DFS-DIC.VIMOS_QC,v 1.2 2011-10-28 11:29:23 cgarcia Exp $"
# ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# COPYRIGHT (c) 2002 European Southern Observatory (ESO)
# LICENSE: GNU General Public License version 2 or later
#
# PROJECT: VLT Data Flow System
# AUTHOR: Carlo Izzo -- ESO/DMD/DPG
# SUBSYSTEM: Instrument pipelines
#
# PURPOSE:
# Define the VIMOS Quality control parameters.
#
# DESCRIPTION:
# Data Interface Dictionary for VIMOS Quality control parameters.
#
# $Name: not supported by cvs2svn $
# $Revision: 1.2 $
#
Dictionary Name: ESO-DFS-DIC.VIMOS_QC
Scope: QC
Source: ESO DFS/DMD
Version Control: "@(#) $Id: ESO-DFS-DIC.VIMOS_QC,v 1.2 2011-10-28 11:29:23 cgarcia Exp $"
Revision: 1.1
Date: 2003-09-17
Status: draft
Description: Implementation
# QC Category
Parameter Name: QC DID
Class: header|qc-log
Context: process
Type: string
Value Format: %30s
Unit:
Comment Field: Data dictionary for QC
Description: Name/version of ESO DID to which QC keywords comply.
Parameter Name: QC MASK CCD X0
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Mask to CCD transformation coefficient.
Description: X position on the CCD of (0,0) position on the mask.
Parameter Name: QC MASK CCD XX
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/mm
Comment Field: Mask to CCD transformation coefficient.
Description: XX component of the rotation matrix.
Parameter Name: QC MASK CCD XY
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/mm
Comment Field: Mask to CCD transformation coefficient.
Description: XY component of the rotation matrix.
Parameter Name: QC MASK CCD Y0
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Mask to CCD transformation coefficient.
Description: Y position on the CCD of (0,0) position on the mask.
Parameter Name: QC MASK CCD YX
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/mm
Comment Field: Mask to CCD transformation coefficient.
Description: YX component of the rotation matrix.
Parameter Name: QC MASK CCD YY
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/mm
Comment Field: Mask to CCD transformation coefficient.
Description: YY component of the rotation matrix.
Parameter Name: QC PINHOLE COUNT
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Number of pinholes for CCD transformation
Description: Number of pinholes used to compute
the CCD transformation.
Parameter Name: QC IMAGE QUALITY MEAN
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Mean image quality
Description: Mean image quality
Parameter Name: QC IMAGE QUALITY RMS
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Image quality RMS
Description: Image quality RMS
Parameter Name: QC ELLIPTICITY MEAN
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean image ellipticity
Description: Mean image ellipticity
Parameter Name: QC ELLIPTICITY RMS
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Image ellipticity RMS
Description: Image ellipticity RMS
Parameter Name: QC ORIENTATION MEAN
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Mean image orientation
Description: Mean image orientation
Parameter Name: QC ORIENTATION RMS
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Image orientation RMS
Description: Image orientation RMS
Parameter Name: QC SHUTTER DELAY
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: s
Comment Field: Shutter delay.
Description: The shutter delay is computed analysing the linearity
curve obtained from a sequence of flat field exposures
at different exposure times. If t is the exposure time
reported in the data header, then the true exposure
time is a quantity (t - s), where s is the shutter
delay. If the lamp intensity remains constant during
the observation, and the detector response is perfectly
linear, and the shutter delay never changes, then the
measured count rate L / (t - s) = C must be constant
for all the illumination levels L. Linear fitting of
the observed table of t and L permits to determine C,
and consequently s. In practice, in order to keep into
account (at least partially) possible non-linearities
of the system or possible lamp variability, a first-order
non-linearity term is added to the relation. This
computation is performed four times on four different
CCD regions, in order to get independent determinations
of the shutter delay, that are then averaged.
Parameter Name: QC SHUTTER DELAY ERROR
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: s
Comment Field: Shutter delay.
Description: The error on the shutter delay is defined as the sigma
of the four independent determinations of the shutter
delay.
Parameter Name: QC BIAS MEDIAN
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Median bias level (ADU)
Description: Median value of the 1600x1800 central pixels of first
raw bias in the input set of frames. No overscan
correction is applied.
Parameter Name: QC BIAS MEAN
Class: qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Mean bias level (ADU)
Description: Mean value of the 1600x1800 central pixels of the first
raw bias in the input set of frames. No overscan
correction is applied.
Parameter Name: QC BIAS RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Sigma of bias (ADU)
Description: Population standard deviation of all 1600x1800 central
pixel values of the first bias in input set of frames.
Parameter Name: QC RON
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Read out noise (ADU)
Description: Population standard deviation of the 1600x1800 central
pixels of the difference between the first and the second
raw biases of the input set of frames, divided by the
square root of 2.
Parameter Name: QC BIAS FPN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Bias fixed pattern noise (ADU)
Description: The population standard deviation of the 1600x1800 central
pixels of the difference between the first raw bias and
the second raw bias shifted by 10x10 pixels, is computed.
This is the combination of fixed pattern noise and read
out noise (scaled by sqrt(2)). The read out noise
contribution is then quadratically subtracted from the
total noise.
Parameter Name: QC BIAS STRUCT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Bias structure (ADU)
Description: The population standard deviation of the 1600x1800 central
pixels of the first raw bias is computed. This is the
combination of structure, fixed pattern noise, and read
out noise. The read out noise and the fixed pattern noise
contributions are then quadratically subtracted.
Parameter Name: QC BIAS MASTER MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Median bias level (ADU)
Description: Median value of the 1600x1800 central pixels of the
product master bias.
Parameter Name: QC BIAS MASTER MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Mean bias level (ADU)
Description: Mean value of the 1600x1800 central pixels of the product
master bias.
Parameter Name: QC BIAS MASTER RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Sigma of master bias (ADU)
Description: Population standard deviation of all 1600x1800 central
pixel values of the product master bias.
Parameter Name: QC BIAS MASTER NOISE
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Noise of master bias (ADU)
Description: The expected noise is computed as the value of QC RON,
divided by the square root of the number of raw bias
frames used in the construction of the master bias.
Next, the population standard deviation of the 1600x1800
central pixel values of the master bias is determined,
excluding from the computation all values differing
from QC BIAS MASTER MEDIAN more than three times the
expected noise.
Parameter Name: QC BIAS MASTER FPN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Master bias fixed pattern noise (ADU)
Description: The population standard deviation of the difference
between the central 1600x1800 pixels of the master
bias, and the region of the master bias shifted
10x10 pixels from the central one, is computed.
This is the combination of fixed pattern noise and
white noise (scaled by sqrt(2)). The white noise
contribution is then quadratically subtracted from
the total noise.
Parameter Name: QC BIAS MASTER STRUCT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Master bias structure (ADU)
Description: The population standard deviation of the 1600x1800
central pixels of the master bias is computed. This
is the combination of structure, fixed pattern noise,
and white noise. The white noise and the fixed pattern
noise contributions are then quadratically subtracted.
Parameter Name: QC DARK MASTER MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Median of master dark (ADU/s)
Description: Median value of the 1600x1800 central pixels of the
product master dark.
Parameter Name: QC DARK MASTER MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Mean of master dark (ADU/s)
Description: Mean value of the 1600x1800 central pixels of the
product master dark.
Parameter Name: QC DARK MASTER RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Sigma of master dark (ADU/s)
Description: Population standard deviation of all 1600x1800 central
pixel values of the product master dark.
Parameter Name: QC DARK CURRENT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/pix/h
Comment Field: Dark current (e-/pix/h)
Description: Simple conversion of QC DARK MASTER MEDIAN to the new
unit.
Parameter Name: QC DARK CURRENT RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/pix/h
Comment Field: Dark current rms (e-/pix/h)
Description: Simple conversion of QC DARK MASTER RMS to the new
unit.
Parameter Name: QC SKY FLAT RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of master sky flat field
Description: The population standard deviation of the 1600x1800
central pixels of the normalized master sky flat field
is computed.
Parameter Name: QC SKY FLAT STRUCT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Structure of master sky flat field
Description: The population standard deviation of the 1600x1800
central pixels of the normalized master flat field
is computed. This is the combination of large scale
structure with noise sources. Then the difference
between the master and the master itself shifted by
10x10 pixels is computed, and the variance of the
1600x1800 central pixels of the result is computed
and corrected by a factor 2. This evaluation of
other noise sources is then quadratically subtracted
from the total standard deviation.
Parameter Name: QC SKY FLAT FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Mean flux of raw sky flat field (ADU/s)
Description: Mean value of the 1600x1800 central pixels of an input
bias corrected sky flat field, divided by the exposure
time.
Parameter Name: QC FLAT EFFICIENCY
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Signal per unit of exposure (ADU/s)
Description: The median level of the 1600x1800 central pixels of
the first input screen flat field is divided by the
exposure time.
Parameter Name: QC FLAT MASTER RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: RMS of not normalized master screen flat field (ADU)
Description: RMS of the 1600x1800 central pixels of the product
non-normalized screen master flat.
Parameter Name: QC FLAT MASTER MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Median of not normalized master screen flat field (ADU)
Description: Median value of the 1600x1800 central pixels of the
product non-normalized screen master flat.
Parameter Name: QC CONAD
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/ADU
Comment Field: Conversion factor from ADU to electrons (e-/ADU)
Description: If the exposure time of the first two raw screen flat
fields in the input set of frames is the same (within 4%),
the difference frame is computed. Then the 1600x1800
central region of the image is divided into 16x18 100x100
boxes. For each one of these boxes, the median signal
level from the first raw frame is divided by the variance
in the difference frame scaled by 2. The median value of
the 16x18 values obtained is the accepted value for the
conversion factor.
Parameter Name: QC CONAD RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/ADU
Comment Field: Error on conversion factor from ADU to electrons (e-/ADU)
Description: If the exposure time of the first two raw screen flat
fields in the input set of frames is the same (within 4%),
the difference frame is computed. Then the 1600x1800
central chip region are divided into 16x18 100x100 boxes.
For each one of these boxes, the median signal level
in the first raw frame is divided by the rms in the
difference frame scaled by the square root of 2.
The rms of the 16x18 values obtained is then computed,
and divided by sqrt(16x18).
Parameter Name: QC FLAT PHN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Photon noise (ADU)
Description: If the exposure time of the first two raw screen flat
fields in the input set of frames is the same (within 4%),
the difference frame is computed. The rms of the 1600x1800
pixel central region of the difference is computed and
then scaled by the square root of 2.
Parameter Name: QC FLAT FPN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Fixed pattern noise (ADU)
Description: If the exposure time of the first two raw screen
flat fields in the input set of frames is the same
(within 4%), the difference between the 1600x1800
central pixels of the first frame, and the same
region shifted by 10x10 pixels in the second frame,
is computed. This is the combination of fixed pattern
noise and photon noise (scaled by sqrt(2)). The photon
noise is then quadratically subtracted.
Parameter Name: QC FLAT STRUCT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU
Comment Field: Screen flat field structure (ADU)
Description: If the photon noise and the fixed pattern noise are
available, the population standard deviation of the
1600x1800 central pixels of the first raw frame is
computed. This is the combination of structure, fixed
pattern noise, and photon noise. The photon noise and
the fixed pattern noise are then quadratically subtracted.
Parameter Name: QC IMAGE QUALITY
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Field: Image quality (arcsec)
Description: Median of Sextractor FWHM of all objects classified
as stars.
Parameter Name: QC IMAGE QUALITY ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Field: Error on image quality (arcsec)
Description: Sigma of Sextractor FWHM of all objects classified
as stars. The sigma is computed iteratively, excluding
from the distribution outliers at more than 3 sigma.
Parameter Name: QC STAR COUNT
Class: header|qc-log
Context: process
Type: int
Value Format: %e
Unit:
Comment Field: Number of stars in image
Description: Number of detected object that were classified by
Sextractor as stars. The image quality parameters are
calculated only if at least 10 stars are detected.
Parameter Name: QC STELLARITY MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean stellarity index
Description: Mean stellarity index of all objects in image.
Parameter Name: QC STELLARITY RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Stellarity index sigma.
Description: Stellarity index sigma of all objects in image.
Parameter Name: QC STAR STELLARITY MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean stellarity index of stars
Description: Mean stellarity index of objects in image classified
by Sextractor as stars.
Parameter Name: QC STAR STELLARITY RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Stellarity index of stars sigma
Description: Stellarity index sigma of objects in image classified
by Sextractor as stars.
Parameter Name: QC STAR ELLIPTICITY MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean ellipticity of stars
Description: Mean ellipticity of objects in image classified by
Sextractor as stars.
Parameter Name: QC STAR ELLIPTICITY RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Sigma of ellipticity of stars
Description: Sigma of ellipticity of objects in image classified by
Sextractor as stars.
Parameter Name: QC STAR ORIENTATION MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Mean orientation of star ellipses (degree)
Description: Mean orientation of star ellipses (from -90 to +90,
counted counterclockwise, with 0 corresponding to
the image X axis). This is determined by a peak
detection algorithm run on an histogram of all
objects orientations. Initially, an approximate
position of the most probable orientation is
determined. Then a new histogram is built, centered
on this position and with a number of bins dependent
on the number of objects available, and a more
accurate peak detection algorithm is run again.
If no peak is detected, this parameter is assigned
the value zero, associated to an error of +/- 90
degrees (this is good for plots).
Parameter Name: QC STAR ORIENTATION RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Sigma on mean orientation of star ellipses (degree)
Description: Sigma of mean orientation of star ellipses. This is
the uncertainty on the position of the maximum of
a gaussian fit to the detected peak. If no peak
were detected, this parameter would be assigned the
value 90.
Parameter Name: QC IMAGE QUALi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Field: Image quality in image cell i (arcsec)
Description: Median of Sextractor FWHM of all objects classified
as stars on image cell i. There are 3x3 cells, counted
from 1 to 9, starting from image bottom from left to
right. Cell 1 begins at image pixel (73,80). All cells
have size 634x760.
Parameter Name: QC IMAGE QUALi ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Field: Error on image quality in image cell i (arcsec)
Description: Sigma of Sextractor FWHM of all objects classified
as stars in cell i. The sigma is computed
iteratively, excluding from the distribution
outliers at more than 3 sigma.
Parameter Name: QC STAR COUNT CELLi
Class: header|qc-log
Context: process
Type: int
Value Format: %e
Unit:
Comment Field: Number of stars in image cell i
Description: Number of detected object that were classified by
Sextractor as stars in cell i. The image quality
parameters for one cell are calculated only if at
least 10 stars are detected within that cell.
Parameter Name: QC STELLARi MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean stellarity index in cell i.
Description: Mean stellarity index of all objects in image cell i.
Parameter Name: QC STELLARi RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Stellarity index sigma in cell i.
Description: Stellarity index sigma of all objects in image cell i.
Parameter Name: QC STAR STELLARi MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean stellarity index of stars in cell i.
Description: Mean stellarity index of objects in image cell i classified
by Sextractor as stars.
Parameter Name: QC STAR STELLARi RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Stellarity index of stars in cell i sigma
Description: Stellarity index sigma of objects in image cell i classified
by Sextractor as stars.
Parameter Name: QC STAR ELLIPTICi MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean ellipticity of stars in cell i.
Description: Mean ellipticity of objects in image cell i classified by
Sextractor as stars.
Parameter Name: QC STAR ELLIPTICi RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Sigma of ellipticity of stars in cell i.
Description: Sigma of ellipticity of objects in image cell i classified
by Sextractor as stars.
Parameter Name: QC STAR ORIENTATi MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Mean orientation of star ellipses in cell i (degree)
Description: Mean orientation of star ellipses (from -90 to +90,
counted counterclockwise, with 0 corresponding to
the image X axis). This is determined by a peak
detection algorithm run on an histogram of all
objects orientations. Initially, an approximate
position of the most probable orientation is
determined. Then a new histogram is built, centered
on this position and with a number of bins dependent
on the number of objects available, and a more
accurate peak detection algorithm is run again.
If no peak is detected, this parameter is assigned
the value zero, associated to an error of +/- 90
degrees (this is good for plots).
Parameter Name: QC STAR ORIENTATi RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: degree
Comment Field: Sigma on mean orientation of ellipses in cell i (degree)
Description: Sigma of mean orientation of star ellipses in image cell i.
This is the uncertainty on the position of the maximum
of a gaussian fit to the detected peak. If no peak were
detected, this parameter would be assigned the value 90.
Parameter Name: QC SKYBACK
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Sky background level (ADU/s)
Description: The sky background is evaluated dividing the central
1600x1800 region of the chip into 10x10 regions 160x180
pixels each. For each region the median level is computed.
The mean of the 10 lowest values obtained is the estimation
of the sky background level. This value is scaled to the
unit of time.
Parameter Name: QC SKYBACK ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Sky background level error (ADU/s)
Description: The sky background is evaluated dividing the central
1600x1800 region of the chip into 10x10 regions 160x180
pixels each. For each region the median level is computed.
The rms of the 10 lowest values obtained is the estimation
of the error on the sky background level.
Parameter Name: QC MAGLIM
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Limiting magnitude.
Description: Limiting magnitude level determined from source detection
on image. Stars are selected, and a histogram of their
magnitudes is built. Binsizes from 0.1 up to 1.0 magnitudes
are tried, until the most populated bin contains at least
20 stars. The position of the most populated bin is taken
as the limiting magnitude. If the 20 stars level for the
highest bin is never reached, the limiting magnitude value
is set to 0.0.
Parameter Name: QC MAGLIM ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Error on limiting magnitude (mag)
Description: The error is assigned the value of the binsize of the
histogram used in the determination of the limiting
magnitude. If no limiting magnitude were found, the
error is set to 0.0.
Parameter Name: QC ZEROPOINT
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Photometric frame zeropoint (mag)
Description: Photometric frame zeropoint Z determined from one standard
star observation:
Z = E_o*A + C*color + mag_cat - mag_instr
E_o is the extinction term used, which is not a QC parameter
but is read from the reference photometric table and is
reported at the head of the same QC1 log file section,
together with the color term C, the color index used,
and the airmass. The values obtained for Z for each
detected standard star are then averaged. If no standard
star is detected, the frame zeropoint is set to 0.0.
Parameter Name: QC ZEROPOINT ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Photometric frame zeropoint error (mag)
Description: Photometric frame zeropoint error, determined as the
rms of the single zeropoints computed for each standard
star used in the zeropoint determination. If only one
star was used, no error is given. If no standard star
were detected, the error is set to 0.0.
Parameter Name: QC ZEROPOINT RAW
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Photometric frame raw zeropoint (mag)
Description: Photometric frame raw zeropoint Z determined from standard
star observations, without correction for extinction and
color term:
mag_instr - mag_cat = Z
The values obtained for Z for each detected standard star
are then averaged.
Parameter Name: QC ZEROPOINT RAW ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag
Comment Field: Photometric frame raw zeropoint error (mag)
Description: Photometric frame raw zeropoint error, determined as
the rms of the single raw zeropoints computed for each
standard star used in the zeropoint determination. If
only one star was used, no error is given.
Parameter Name: QC ZEROPOINT NSTARS
Class: header|qc-log
Context: process
Type: int
Value Format: %e
Unit:
Comment Field: Number of standard stars
Description: Number of standard stars used in frame zeropoint
computation.
Parameter Name: QC EXTINCTION
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag/airmass
Comment Field: Estimated atmospheric extinction (mag/airmass)
Description: Atmospheric extinction determined from one standard
star observation:
E = E_o + (Z_o - Z) / A
E_o is the extinction term which was used in the computation
of the zeropoint Z (QC ZEROPOINT), and Z_o is the known
instrument zeropoint: both terms are read from the
reference photometric table. If no standard star is
detected, the extinction is set to 0.0.
Parameter Name: QC EXTINCTION ERROR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: mag/airmass
Comment Field: Error on estimated atmospheric extinction (mag/airmass)
Description: Error on estimated atmospheric extinction, propagating
uncertainties from E_o, Z_o, and Z (QC EXTINCTION).
If only one star was used, or no standard star were
detected, the error is set to 0.0.
Parameter Name: QC MOS RESOLUTION1 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at red end of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at the red end of spectrum.
Parameter Name: QC MOS RESOLUTION2 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at center of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at about the center of spectrum.
Parameter Name: QC MOS RESOLUTION3 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at blue end of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at the blue end of spectrum.
Parameter Name: QC MOS RESOLUTION1
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at red end of spectrum
Description: Spectral resolution at red end of spectrum, averaged
on all slits, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC MOS RESOLUTION2
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at center of spectrum
Description: Spectral resolution at spectrum center, averaged
on all slits, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC MOS RESOLUTION3
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at blue end of spectrum
Description: Spectral resolution at blue end of spectrum, averaged
on all slits, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC MOS RESOLUTION1 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at red end of spectrum
Description: RMS of spectral resolution determined at the red end
of each slit spectrum.
Parameter Name: QC MOS RESOLUTION2 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at center of spectrum
Description: RMS of spectral resolution determined at the center
of each slit spectrum.
Parameter Name: QC MOS RESOLUTION3 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at blue end of spectrum
Description: RMS of spectral resolution determined at the blue end
of each slit spectrum.
Parameter Name: QC MOS IDS RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Inverse dispersion solution RMS
Description: RMS of the IDS residuals, evaluated on a 2D extracted
arc lamp frame.
Parameter Name: QC MOS REFWAVE MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Mean position of reference wavelength (pixel)
Description: Applying the inverse dispersion solution local to each
slit, the reference wavelength is transformed into CCD
pixels corrected for the slit position. The mean of
the reference wavelength position for each slit is then
computed.
Parameter Name: QC MOS REFWAVE RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: RMS of positions of reference wavelength (pixel)
Description: Applying the inverse dispersion solution local to each
slit, the reference wavelength is transformed into CCD
pixels corrected for the slit position. The RMS of
the reference wavelength position for each slit is then
computed.
Parameter Name: QC MOS SLIT WIDTH
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Field: Width of slit closest to mask center (arcsec)
Description: Width of slit closest to mask center.
Parameter Name: QC MOS WAVECAL COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/Angstrom^i
Comment Field: Median i-th IDS coef. for slit closest to center (pixel/A^i)
Description: Median i-th coefficient of the inverse dispersion solution
local to the slit closest to the mask center, with
i = 1, 2, ..., n (where n is the degree of the polynomial
used).
Parameter Name: QC MOS FLAT FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Flux at ref.wavel. for slit closest to center (ADU/mm^2/s)
Description: The position of the slit closest to the mask center is
determined in an input raw flat field frame. For this
slit the position of the reference wavelength is determined
applying the available spectral distorsion models. The
total counts in the rectangular region long as the slit
length in pixels, and wide 5 CCD pixels, centered at the
reference wavelength position, are then bias subtracted
and divided by the area of the slit and by the exposure
time.
Parameter Name: QC MOS FLAT FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Error on QC MOS FLAT FLUX (ADU/mm^2/s)
Description: The total counts in the rectangular region where the flux
is determined are square-rooted, and then normalized to
the unit of area and time.
Parameter Name: QC IFU HE LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen He arc lamp line for flux determination (Angstrom)
Description: Line of the He arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC IFU HE FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Mean flux at a He wavel. in all spectra (ADU/fiber/s)
Description: The mean total counts along a 11 pixel interval centered
at the specified wavelength for each extracted spectrum,
are averaged on all extracted spectra, and normalised to
the total exposure time.
Parameter Name: QC IFU HE FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Error on QC IFU HE FLUX (ADU/fiber/s)
Description: Population standard deviation from the mean of all
the flux values for each extracted spectrum used for
deriving QC IFU HE FLUX, normalized to the unit of
time.
Parameter Name: QC IFU NE LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen Ne arc lamp line for flux determination (Angstrom)
Description: Line of the Ne arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC IFU NE FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Mean flux at a Ne wavel. in all spectra (ADU/fiber/s)
Description: The mean total counts along a 11 pixel interval centered
at the specified wavelength for each extracted spectrum,
are averaged on all extracted spectra, and normalised to
the total exposure time.
Parameter Name: QC IFU NE FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Error on QC IFU NE FLUX (ADU/fiber/s)
Description: Population standard deviation from the mean of all
the flux values for each extracted spectrum used for
deriving QC IFU NE FLUX, normalized to the unit of
time.
Parameter Name: QC IFU AR LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen Ar arc lamp line for flux determination (Angstrom)
Description: Line of the Ar arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC IFU AR FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Mean flux at a He wavel. in all spectra (ADU/fiber/s)
Description: The mean total counts along a 11 pixel interval centered
at the specified wavelength for each extracted spectrum,
are averaged on all extracted spectra, and normalised to
the total exposure time.
Parameter Name: QC IFU AR FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/fiber/s
Comment Field: Error on QC IFU AR FLUX (ADU/fiber/s)
Description: Population standard deviation from the mean of all
the flux values for each extracted spectrum used for
deriving QC IFU AR FLUX, normalized to the unit of
time.
Parameter Name: QC MOS HE LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen He arc lamp line for flux determination (Angstrom)
Description: Line of the He arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC MOS HE FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Flux at a He wavel. in slit closest to center (ADU/mm^2/s)
Description: The position of the slit closest to the mask center is
determined in an input arc lamp frame. The position of
the chosen He arc lamp line is determined and its signal
integrated. The total counts are then bias corrected and
divided by the area of the slit and by the exposure time.
Parameter Name: QC MOS HE FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Error on QC MOS HE FLUX (ADU/mm^2/s)
Description: The total counts in the rectangular region where the flux
is determined are square-rooted, and then normalized to
the unit of area and time.
Parameter Name: QC MOS NE LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen Ne arc lamp line for flux determination (Angstrom)
Description: Line of the Ne arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC MOS NE FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Flux at a Ne wavel. in slit closest to center (ADU/mm^2/s)
Description: The position of the slit closest to the mask center is
determined in an input arc lamp frame. The position of
the chosen Ne arc lamp line is determined and its signal
integrated. The total counts are then bias corrected and
divided by the area of the slit and by the exposure time.
Parameter Name: QC MOS NE FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Error on QC MOS HE FLUX (ADU/mm^2/s)
Description: The total counts in the rectangular region where the flux
is determined are square-rooted, and then normalized to
the unit of area and time.
Parameter Name: QC MOS AR LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen Ar arc lamp line for flux determination (Angstrom)
Description: Line of the Ar arc lamp, chosen for flux measurement,
depending on the grism in use.
Parameter Name: QC MOS AR FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Flux at a Ar wavel. in slit closest to center (ADU/mm^2/s)
Description: The position of the slit closest to the mask center is
determined in an input arc lamp frame. The position of
the chosen Ar arc lamp line is determined and its signal
integrated. The total counts are then bias corrected and
divided by the area of the slit and by the exposure time.
Parameter Name: QC MOS AR FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Error on QC MOS HE FLUX (ADU/mm^2/s)
Description: The total counts in the rectangular region where the flux
is determined are square-rooted, and then normalized to
the unit of area and time.
Parameter Name: QC MOS EFFICIENCYi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/photon
Comment Field: Value of efficiency at given wavelength (e-/photon)
Description: The efficiency curve is computed as the ratio between
the standard star catalog fluxes converted to photons
(per second per Angstrom), and the observed standard
star spectrum converted to electrons (per second per
Angstrom). This curve is then smoothed by a heavy
median filter and then fitted by a high degree
polynomial, to obtain a smooth efficiency curve
unaffected by local atmospheric absorbtions and
by uncertainties around the absorbtion lines in the
standard star spectral continuum. The values of the
efficiency at different wavelengths are read from
this smoothed curve.
Parameter Name: QC MOS EFFICIENCYi LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Value of efficiency at given wavelength (Angstrom)
Description: Wavelength at which the efficiency was measured.
Parameter Name: QC IFU EFFICIENCYi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: e-/photon
Comment Field: Value of efficiency at given wavelength (e-/photon)
Description: The efficiency curve is computed as the ratio between
the standard star catalog fluxes converted to photons
(per second per Angstrom), and the observed standard
star spectrum converted to electrons (per second per
Angstrom). This curve is then smoothed by a heavy
median filter and then fitted by a high degree
polynomial, to obtain a smooth efficiency curve
unaffected by local atmospheric absorbtions and
by uncertainties around the absorbtion lines in the
standard star spectral continuum. The values of the
efficiency at different wavelengths are read from
this smoothed curve.
Parameter Name: QC IFU EFFICIENCYi LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Value of efficiency at given wavelength (Angstrom)
Description: Wavelength at which the efficiency was measured.
Parameter Name: QC OH LINEi LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Chosen sky line for flux determination (Angstrom)
Description: Sky line for flux measurement.
Parameter Name: QC OH LINEi FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Flux at OH skyline i (ADU/mm^2/s)
Description: The position of the slit closest to the mask center
is determined in an input science frame. The position
of the chosen sky line is determined and its signal
integrated. The total counts are then bias corrected
and divided by the area of the slit and by the exposure
time. The choice of skylines depends on the grism in
use.
Parameter Name: QC OH LINEi FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/mm^2/s
Comment Field: Error on QC OH LINEi FLUX (ADU/mm^2/s)
Description: The total counts in the rectangular region where the flux
is determined are square-rooted, and then normalized to
the unit of area and time.
Parameter Name: QC IFU LOSTi
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit:
Comment Field: Lost fibers on IFU pseudo-slit i
Description: Number of fibers that could not be traced on pseudo-slit i.
Parameter Name: QC IFU TRACEi RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Mean RMS of polynomial fits of spectral tracings (pixel)
Description: Mean value of the RMS of the polynomial fitting
obtained on each traced IFU spectrum on pseudo-slit i.
Parameter Name: QC IFU IDS RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel
Comment Field: Inverse dispersion solution RMS (pixel)
Description: RMS of the IDS residuals, evaluated on a 2D extracted
arc lamp frame.
Parameter Name: QC IFU RESOLUTION1 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at red end of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at the red end of spectrum.
Parameter Name: QC IFU RESOLUTION2 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at center of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at about the center of spectrum.
Parameter Name: QC IFU RESOLUTION3 LAMBDA
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Wavelength at blue end of spectrum (Angstrom)
Description: Wavelength of arc lamp line chosen for determining
the spectral resolution at the blue end of spectrum.
Parameter Name: QC IFU RESOLUTION1
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at red end of spectrum
Description: Spectral resolution at red end of spectrum, averaged
on all spectra, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC IFU RESOLUTION2
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at center of spectrum
Description: Spectral resolution at spectrum center, averaged
on all spectra, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC IFU RESOLUTION3
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Mean spectral resolution at blue end of spectrum
Description: Spectral resolution at blue end of spectrum, averaged
on all spectra, evaluated on an arc lamp spectrum line
dependent on the used grism. The spectral resolution
is computed as the ratio between the arc lamp line
wavelength, and its FWHM.
Parameter Name: QC IFU RESOLUTION1 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at red end of spectrum
Description: RMS of spectral resolution determined at the red end
of each fiber spectrum.
Parameter Name: QC IFU RESOLUTION2 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at center of spectrum
Description: RMS of spectral resolution determined at the center
of each fiber spectrum.
Parameter Name: QC IFU RESOLUTION3 RMS
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: RMS of spectral resolution at blue end of spectrum
Description: RMS of spectral resolution determined at the blue end
of each fiber spectrum.
Parameter Name: QC IFU WAVECAL1 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/Angstrom^i
Comment Field: Median i-th IDS coeff. for pseudo-slit 1 (pixel/A^i)
Description: Median i-th coefficient of the inverse dispersion
solutions on pseudo-slit 1, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU WAVECAL2 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/Angstrom^i
Comment Field: Median i-th IDS coeff. for pseudo-slit 2 (pixel/A^i)
Description: Median i-th coefficient of the inverse dispersion
solutions on pseudo-slit 2, with i = 1, 2, ..., n
(where n is the degree of the polynomial used).
Parameter Name: QC IFU WAVECAL3 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/Angstrom^i
Comment Field: Median i-th IDS coeff. for pseudo-slit 3 (pixel/A^i)
Description: Median i-th coefficient of the inverse dispersion
solutions on pseudo-slit 3, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU WAVECAL4 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/Angstrom^i
Comment Field: Median i-th IDS coeff. for pseudo-slit 4 (pixel/A^i)
Description: Median i-th coefficient of the inverse dispersion
solutions on pseudo-slit 4, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU TRACE1 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/pixel^i
Comment Field: Median i-th tracing coeff. for pseudo-slit 1 (pixel/pixel^i)
Description: Median i-th coefficient of the fiber spectra tracing
solutions on pseudo-slit 1, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU TRACE2 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/pixel^i
Comment Field: Median i-th tracing coeff. for pseudo-slit 2 (pixel/pixel^i)
Description: Median i-th coefficient of the fiber spectra tracing
solutions on pseudo-slit 2, with i = 1, 2, ..., n
(where n is the degree of the polynomial used).
Parameter Name: QC IFU TRACE3 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/pixel^i
Comment Field: Median i-th tracing coeff. for pseudo-slit 3 (pixel/pixel^i)
Description: Median i-th coefficient of the fiber spectra tracing
solutions on pseudo-slit 3, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU TRACE4 COEFFi
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: pixel/pixel^i
Comment Field: Median i-th traceing coeff. for pseudo-slit 4 (pixel/pixel^i)
Description: Median i-th coefficient of the fiber spectra tracing
solutions on pseudo-slit 4, with i = 1, 2, ..., n
(where n is the degree of the polynomial used). This
parameter is not computed for MR and HR observations.
Parameter Name: QC IFU REFROWi
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit: pixel
Comment Field: CCD Y pixel coordinate where the tracing is started.
Description: The reference row is the Y pixel position on the CCD
where, for a given pseudo-slit i, each fiber spectrum
is detected, identified, and conventionally begun to
be traced. This parameter is reported here, because
referenced by other IFU QC1 parameters.
Parameter Name: QC IFU TRACEi CENTRAL
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit:
Comment Field: Number of active fiber closest to central CCD X pixel.
Description: On pseudo-slit i, this is the sequence number of the
active fiber closest to the central CCD X pixel at the
reference row (see QC IFU REFROWi).
Parameter Name: QC IFU TRACEi SLOPE
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit:
Comment Field: Slope of the tracing of the central fiber at reference row.
Description: On pseudo-slit i, a linear fit is made to the tracing of
the central spectrum (see QC IFU TRACEi CENTRAL), 400
pixels centered on the reference row (see QC IFU REFROWi).
In absence of optical distortions, a perfect grism alignment
would correspond to a zero slope.
Parameter Name: QC IFU FLUX LAMBDA1
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: Start wavelength in flat field flux determination (A)
Description: The flat field flux (see QC IFU FLUX MEAN) is measured
on a wavelength interval starting at the specified
value.
Parameter Name: QC IFU FLUX LAMBDA2
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: Angstrom
Comment Field: End wavelength in flat field flux determination (A)
Description: The flat field flux (see QC IFU FLUX MEAN) is measured
on a wavelength interval ending at the specified value.
Parameter Name: QC IFU FLAT FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Mean flat field signal within given spectral range (ADU/s)
Description: The mean integrated signal, per fiber, per second,
within the specified wavelength range, is computed
on all active pseudo-slits.
Parameter Name: QC IFU FLAT FLUXERR
Class: header|qc-log
Context: process
Type: double
Value Format: %e
Unit: ADU/s
Comment Field: Statistical error on mean flat field signal (ADU/s)
Description: Error on the mean integrated signal, per fiber, per
second, within the specified wavelength range.
|