| Initial Gaia Source List (IGSL) |
| The Initial Gaia Source List (IGSL) was commissioned by DPAC to fulfill the following broad requirements: all-sky positions, proper motions, and magnitudes for objects to a limit of Gaia magnitude G = 21 where possible, e.g., where there are large (>10000 square degrees) catalogs that reach that limit. The proper motions and magnitudes are provided on a best effort basis, nominally with precisions of 10 mas/yr and 0.3 magnitudes, respectively, but obviously limited by the currently available large catalogs. The DPAC Quasar and the Ecliptic Pole catalogs are included with no selection on magnitudes. Hipparcos objects were also included with no selection on magnitudes. The IGSL has been used as the starting point for the Initial Data Treatment (IDT) cross-matching routines. See Smart, R.L. and Nicastro, L., A&A, 570, A87 (2014) for further details. Required constraints:
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| Name | Type | Length | Unit | Description | Default Value | Unified Content Descriptor |
|---|---|---|---|---|---|---|
| solution_id | bigint | 8 | Solution identifier | meta.id;meta.version | ||
| source_id | bigint | 8 | Unique source identifier | meta.id;meta.main | ||
| ra | float | 8 | degrees | Celestial Right Ascension at catalogue epoch | pos.eq.ra;meta.main | |
| dec | float | 8 | degrees | Celestial Declination at catalogue epoch | pos.eq.dec;meta.main | |
| ra_error | real | 4 | milliarcsec | Standard error of Right Ascension | stat.error;pos.eq.ra | |
| dec_error | real | 4 | milliarcsec | Standard error of Declination | stat.error;pos.eq.dec | |
| ra_epoch | real | 4 | years | Mean Epoch of Right Ascension | time.epoch | |
| dec_epoch | real | 4 | years | Mean Epoch of Declination | time.epoch | |
| source_position | tinyint | 1 | Source of the position estimate | meta.code | ||
| pm_ra | real | 4 | milliarcsec/year | Proper motion in RA at catalogue epoch | pos.pm;pos.eq.ra | |
| pm_dec | real | 4 | milliarcsec/year | Proper motion in Dec at catalogue epoch | pos.pm;pos.eq.dec | |
| pm_ra_error | real | 4 | milliarcsec/year | Error in proper motion in RA | stat.error;pos.pm;pos.eq.ra | |
| pm_dec_error | real | 4 | milliarcsec/year | Error in proper motion in Dec | stat.error;pos.pm;pos.eq.dec | |
| source_mu | tinyint | 1 | Source of the proper motions | meta.code | ||
| galactic_lon | real | 4 | degrees | Galactic longitude | pos.galatic.lon | |
| galactic_lat | real | 4 | degrees | Galactic latitude | pos.galatic.lat | |
| ecliptic_lon | real | 4 | degrees | Ecliptic longitude | pos.ecliptic.lon | |
| ecliptic_lat | real | 4 | degrees | Ecliptic latitude | pos.ecliptic.lat | |
| mag_bj | real | 4 | mag | B magnitude measure (GSC23 system) | phot.mag;em.opt.B | |
| mag_bj_error | real | 4 | mag | Error in B magnitude measure | stat.error;phot.mag;em.opt.B | |
| source_mag_bj | tinyint | 1 | Source of the B magnitude | meta.code | ||
| mag_rf | real | 4 | mag | R magnitude measure (GSC23 system) | phot.mag;em.opt.R | |
| mag_rf_error | real | 4 | mag | Error in R magnitude measure | stat.error;phot.mag;em.opt.R | |
| source_mag_rf | tinyint | 1 | Source of the R magnitude | meta.code | ||
| mag_g | real | 4 | mag | G magnitude estimate | phot.mag;em.opt | |
| mag_g_error | real | 4 | mag | Error on G magnitude estimate | stat.error;phot.mag;em.opt | |
| source_mag_g | tinyint | 1 | Source of the G magnitude | meta.code | ||
| mag_grvs | real | 4 | mag | RVS G magnitude estimate | phot.mag;em.opt | |
| mag_grvs_error | real | 4 | mag | Error on RVS G magnitude estimate | stat.error;phot.mag;em.opt | |
| source_mag_grvs | tinyint | 1 | Source of the RVS G magnitude | meta.code | ||
| classification | bit | 1 | Classification, simply a 0=star and 1=nonstar taken from different sources as given in the souce_classification field | meta.code.class | ||
| source_classification | tinyint | 1 | Source of the classification | meta.code | ||
| toggle_asc | bit | 1 | A flag that indicates if the object is used for the Atittude Star Catalog | meta.code | ||
| aux_gsc23 | bit | 1 | Flag indicating presence in GSC2.3 (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_sdss | bit | 1 | Flag indicating presence in SDSS (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_ucac | bit | 1 | Flag indicating presence in UCAC (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_lqrf | bit | 1 | Flag indicating presence in LQRF (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_tycho | bit | 1 | Flag indicating presence in Tycho (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_hip | bit | 1 | Flag indicating presence in Hipparcos (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_ppmxl | bit | 1 | Flag indicating presence in PPMXL (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_ogle | bit | 1 | Flag indicating presence in OGLE (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_tmass | bit | 1 | Flag indicating presence in 2MASS PSC (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| aux_epc | bit | 1 | Flag indicating presence in Ecliptic Poles Catalogue (0 = no; 1 = yes) | meta.id;meta.dataset | ||
| cx | float | 8 | unit vector of spherical co-ordinates | pos.distance;pos.cartesian.x | ||
| cy | float | 8 | unit vector of spherical co-ordinates | pos.distance;pos.cartesian.y | ||
| cz | float | 8 | unit vector of spherical co-ordinates | pos.distance;pos.cartesian.z | ||
| htmID | bigint | 8 | Hierarchical Triangular Mesh (HTM) index, 20 deep, for equatorial co-ordinates | pos.eq | ||
| Total length | 163 |