/usr/include/astrometry/nomad.h is in libastrometry-dev 0.70+dfsg-1.
This file is owned by root:root, with mode 0o644.
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# This file is part of the Astrometry.net suite.
# Licensed under a 3-clause BSD style license - see LICENSE
*/
#ifndef NOMAD_H
#define NOMAD_H
#include <stdint.h>
#include "astrometry/starutil.h"
#define NOMAD_RECORD_SIZE 88
/*
See: http://www.nofs.navy.mil/nomad/nomad_readme.html
*/
struct nomad_entry {
// [degrees]
double ra;
double dec;
// [degrees]
float sigma_racosdec;
float sigma_dec;
// [arcsec/yr]
float pm_racosdec;
float pm_dec;
// [arcsec/yr]
float sigma_pm_racosdec;
float sigma_pm_dec;
// [yr]
float epoch_ra;
float epoch_dec;
// mag
// (30.000 in any magnitude field indicates "no data".)
// (30.001 = "no data" but ...)
float mag_B;
float mag_V;
float mag_R;
float mag_J;
float mag_H;
float mag_K;
int32_t usnob_id;
int32_t twomass_id;
int32_t yb6_id;
int32_t ucac2_id;
int32_t tycho2_id;
// all these take values from the "nomad_src" enum.
uint8_t astrometry_src;
uint8_t blue_src;
uint8_t visual_src;
uint8_t red_src;
anbool usnob_fail; // UBBIT "Fails Blaise's test for USNO-B1.0 star"
anbool twomass_fail; // TMBIT "Fails Roc's test for clean 2MASS star"
anbool tycho_astrometry; // TYBIT "Astrometry comes from Tycho2"
anbool alt_radec; // XRBIT "Alt correlations for same (RA,Dec)"
// This bit is NEVER set in NOMAD.
//anbool alt_2mass; // ITMBIT "Alt correlations for same 2MASS ID"
anbool alt_ucac; // IUCBIT "Alt correlations for same UCAC-2 ID"
anbool alt_tycho; // ITYBIT "Alt correlations for same Tycho2 ID"
anbool blue_o; // OMAGBIT "Blue magnitude from O (not J) plate"
anbool red_e; // EMAGBIT "Red magnitude from E (not F) plate"
anbool twomass_only; // TMONLY "Object found only in 2MASS cat"
anbool hipp_astrometry; // HIPAST "Ast from Hipparcos (not Tycho2) cat"
anbool diffraction; // SPIKE "USNO-B1.0 diffraction spike bit set"
anbool confusion; // TYCONF "Tycho2 confusion flag"
anbool bright_confusion; // BSCONF "Bright star has nearby faint source"
anbool bright_artifact; // BSART "Faint source is bright star artifact"
anbool standard; // USEME "Recommended astrometric standard"
// This bit is NEVER set in NOMAD.
//anbool external; // EXCAT "External, non-astrometric object"
// this is a staging area for FITS i/o.
uint8_t flags[2];
// sequence number assigned by us (it's not in the original catalogue),
// composed of the 1/10 degree DEC zone (top 11 bits) and the sequence
// number within the zone (bottom 21 bits).
uint32_t nomad_id;
};
typedef struct nomad_entry nomad_entry;
enum nomad_src {
NOMAD_SRC_NONE = 0,
NOMAD_SRC_USNOB,
NOMAD_SRC_2MASS,
NOMAD_SRC_YB6,
NOMAD_SRC_UCAC2,
NOMAD_SRC_TYCHO2,
NOMAD_SRC_HIPPARCOS,
};
int nomad_parse_entry(nomad_entry* entry, const void* encoded);
#endif
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