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I/324               The Initial Gaia Source List (IGSL)     (Smart, 2013)

The Initial Gaia Source List (IGSL) Smart R.L., Nicastro L. <ESA Document Gaia-C3-TN-OATO-RLS-004-01 > =2013yCat.1324....0S =2014A&A...570A..87S
ADC_Keywords: Positional data ; Proper motions ; Photometry, photographic Cross identifications Keywords: catalogs - surveys - astrometry Abstract: The Initial Gaia Source List will be the starting point for the Gaia Initial Data Treatment. The Attitude Star Catalog will be used by the first iteration of the on-ground attitude reconstruction. Description: The IGSL is a compilation catalog produced for the Gaia mission. We have combined data from the following catalogs or datasets to produce a homogenous list of positons, proper motions, photometry in a blue and red band and estimates of the magnitudes in the Gaia G and G_RVS bands. Included Catalogs: Tycho2, LQRF, UCAC4, SDSS-DR9, PPMXL, GSC23, GEPC, OGLE, Sky2000, 2MASS. Note that in compiling the various entries we did not consider the individual flags. Overall, we think this catalog is reliable but there will be errors, mismatches and duplicates. The user should use this catalog with that in mind, it is fine for statistical studies that has some way to remove obviously incorrect entries but it should only be used with care for individual objects. The source catalogs used to produce the IGSL are: * The Gaia Ecliptic Pole Catalog, version 3.0 (GEPC) Altmann & Bastian 2009, "Ecliptic Poles Catalogue Version 1.1" ESA Document GAIA-C3-TN-ARI-MA-002 URL * GSC2.3: GSC2 version 2.3, Lasker et al. 2008AJ....136..735L (I/305) * an excerpt of the 4th version of the Gaia Initial QSO Catalog (GIQC) as compiled by the GWP-S-335-13000, formed by Alexandre H. Andrei, Christophe Barache, Dario N. da Silva Neto, Francois Taris, Geraldine Bourda, Jean-Francois Le Campion, Jean Souchay, J.J. Pereira Osorio, Julio I. Bueno de Camargo, Marcelo Assafin, Roberto Vieira Martins, Sebastien Bouquillon, Sebastien Lambert, Sonia Anton, Patrick Charlot * OGLE: Optical Gravitational Lensing Experiment version III (Szymaski et al., 2011, Cat. J/AcA/61/83) * PPMXL: Positions and Proper Motions "Extra Large" Catalog, Roeser et al. (2010, Cat. I/317) * SDSS: Sloan Digital Sky Survey data release 9, Cat. V/139 * UCAC4: Zacharias et al., 2012, Cat. I/322 * Tycho-2, Hoeg et al., 2000, Cat. I/259 File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file igsl3.sam 324 1000 Sample of the IGSL3 data release
Byte-by-byte Description of file: igsl3.sam
Bytes Format Units Label Explanations
1- 19 I19 --- sourceId Source identifier 21- 30 F10.6 deg RAJ2000 Right Ascension at J2000 (alpha) 32- 41 F10.6 deg DEJ2000 Declination at J2000 (delta) 43- 48 F6.3 mag magBJ ? GSC23 B mag measure 50- 55 F6.3 mag magRF ? GSC23 R mag measure 57- 62 F6.3 mag magG ? G mag estimate 64- 69 F6.3 mag magGrvs ? Grvs mag estimate 71- 76 F6.3 mag e_magBJ ? Standard error on magBJ 78- 83 F6.3 mag e_magRF ? Standard error on magRF 85- 90 F6.3 mag e_magG ? Standard error on magG 92- 97 F6.3 mag e_magGrvs ? Standard error on magGrvs 99-103 F5.3 arcsec e_RAJ2000 Standard error on RAJ2000*cos(DEJ2000) 105-109 F5.3 arcsec e_DEJ2000 Standard error on DEJ2000 111-119 F9.4 yr alphaEpoch Mean Epoch of Right Ascension 121-129 F9.4 yr deltaEpoch Mean Epoch of Declination 131-132 I2 --- sourcePosition Position source (1) 134-140 F7.1 mas/yr pmRA Proper motion in RA (muAlpha) 142-148 F7.1 mas/yr pmDE Proper motion in DEC (muDelta) 150-155 F6.1 mas/yr e_pmRA ? Standard error on pmRA (e_muAlpha) 157-162 F6.1 mas/yr e_pmDE ? Standard error on pmDE (e_muDelta) 164-165 I2 --- sourceMu Proper motion source (1) 167-168 I2 --- sourceMagBJ BJ magnitude source (2) 170-171 I2 --- sourceMagRF RF magnitude source (2) 173-174 I2 --- sourceMagG G magnitude source (2) 176-177 I2 --- sourceMagGrvs Grvs magnitude source (2) 179 I1 --- classification ?=-1 Classification 0=star, 1=nonstars 181-182 I2 --- sourceClassification Classification source (1) 184 I1 --- toggleASC ?=-1 Attitude Star Catalog Toggle (3) 186-195 A10 --- idGSC23 ? GSC23 identifier 197-215 I19 --- idSDSS ? SDSS DR9 identifier 217-225 I9 --- idUCAC ? UCAC4 identifier 227-232 I6 --- idLQRF ? LQRF identifier (4) 234-246 I13 --- idTYCHO ? Tycho-2 identifier (5) 248-253 I6 --- idHIP ? Hipparcos number 255-273 I19 --- idPPMXL ? PPMXL identifier 275-287 I13 --- idOGLE ? OGLE identifier (6) 289-304 A16 --- idTMASS ? 2MASS identifier (7) 306-324 A19 --- idGEPC ? GEPC identifier
Note (1): Position, proper motion and classification source catalogs are identified by a number following this convention: 1 = 2008AJ....136..735L Guide Star Catalog 2 = 2009ApJS..182..543A Sloan Digital Sky Survey 3 = 2010AJ....139.2184Z U.S. Naval Observatory CCD Astrograph Catalog 4 = 2009A&A...505..385A Large Quasar Reference Frame 5 = 2000A&A...355L..27H Tycho-2 18 = 2006AJ....131.1163S Two Micron Sky Survey Point Source Catalog 49 = 2010AJ....139.2440R Large PPM catalog 66 = 2010AcA....60..295S Optical Gravitational Lensing Experiment 67 = GEPC30 Gaia Ecliptic Pole Catalog 68 = Note (2): The source of the magnitudes are given based on the following codes: 01: RF/BJ = value from GSC23, sigma = 0.3 02: RF/BJ = value from PPMXL, sigma = 0.4 10: R_F = V-0.0478-0.5739(B-V)-0.0938(B-V)2-0.4606(B-V)3 +0.8419(B-V)4-0.3472(B-V)5, sigma= sigma_{B}, \rmNotevalidonlyfor(B-V)<2.5. 11: R_F = R-0.0066-0.0563(V-R)-0.2505(V-R)2+0.3912(V-R)3 -0.0707(V-R)^4, sigma= sigma_{V} 12: R_F = V-0.0137-0.5573(V-I), sigma=(, sigma_{V}^2+, sigma_{I}2){1/2} 13: B_J = V+0.0036+0.8768(B-V)-0.0594(B-V)^2, sigma= sigma_{B},\rmNotevalidonlyfor(B-V)<2.5. 14: B_J = R-0.0480+2.4850(V-R)-0.8760(V-r)2+2.9117(V-r)3 -3.4144(V-r)4+1.11850(V-r)5, sigma= sigma_{V} 15: B_J = V+0.0442+0.7851(V-I), sigma=(, sigma_{V}^2+, sigma_{I}2){1/2} 16: R_F = VT-0.0478-0.578(BT-VT)-0.0677(BT-V_T)^2 -0.2828(BT-VT)3+0.4395(BT-VT)4+0.1541(BT-VT)^5, sigma= sigma{VT},\rmNotevalidonlyfor(BT-VT)<2.5. 17: B_J = VT-0.0036+0.655(BT-VT)-0.0429(BT-V_T)^2, sigma= sigma{BT},\rmNotevalidonlyfor(BT-VT)<2.5. 18: R_F = r+0.1784+0.1187(g-r+0.259)+0.0195(g-r+0.259), sigma=(0.04+, sigma_r2){0.5} 19: B_J = g+0.0880+0.2434(g-r+0.259)+0.0439(g-r+0.259), sigma=(0.04+, sigma_g2){0.5} 20: B_J = Vp+0.3608+1.40985(Vp-R_F), sigma=0.5 21: B_J = RF+0.3841+1.97440(RF-I_N), sigma=0.5 28: G = VT-0.0246-0.3354(BT-VT)-0.02558(BT-V_T)^2 -0.05153(BT-VT)^3, sigma=(0.2916+, sigma{VT}^2+, sigma{BT}2){1/2} 29: G_{RVS} = VT-0.1313-1.3422(BT-VT)-0.09316(BT-V_T)^2 -0.0663(BT-VT)^3, sigma=(0.2916+, sigma{VT}^2+, sigma{BT}2){1/2} 30: G = g-0.1128-0.5264(g-i)-0.0869(g-i)2+0.0025(g-i)3, sigma=(0.08^2+, sigma_g^2+, sigma_i2){1/2} 31: G_{RVS} = g-0.4994-1.2026(g-i)-0.0202(g-i)2+0.0021(g-i)3, sigma=(0.11^2+, sigma_g^2+, sigma_i2){1/2} 32: G = g-0.089-0.8543(g-r)-0.1281(g-r)2+0.0471(g-r)3, sigma=(0.1681+, sigma_g^2+, sigma_r2){1/2} 33: G_{RVS} = g-0.4332-1.8906(g-r)-0.0231(g-r)2-0.0329(g-r)3, sigma=(0.2401+, sigma_g^2+, sigma_r2){1/2} 41: B_J = J+4.9816-0.38945670(J-K), sigma=0.5 42: R_F = J+2.6997-0.46257863(J-K), sigma=0.5 50: G = RF-0.0158+0..2915(BJ-RF)-0.0347(BJ-R_F)^2 -0.0301(BJ-RF)^3, sigma=0.4 51: G_{RVS} = RF-0.0974-0.4830(BJ-RF)-0.0184(BJ-R_F)^2 -0.0178(BJ-RF)^3, sigma=0.5 52: G = V-0.0247-0.2888(B-V)-0.0353(B-V)2-0.0839(B-V)3, sigma=0.6 54: G = V-0.0208-0.1004(V-I)-0.1593(V-I)2+0.0083(V-I)3, sigma=(, sigma_V^2+, sigma_I2){1/2} 55: G_{RVS} = V-0.1333-1.4654(B-V)-0.1075(B-V)2-0.0768(B-V)3, sigma=0.6 57: G_{RVS} = V-0.0501-1.1667(V-I)-0.0052(V-I)2+0.0011(V-I)3, sigma=(, sigma_V^2+, sigma_I2){1/2} 80: G = value from GEPC 81: G_{RVS} = value from GEPC Note (3): The Attitude Star Catalog Toggle is 1 if it should be considered a reliable ASC object or 0 if not. Based on the requirements discussed in the related publication. Note (4): This identifier refers to a custom version of LQRF used internally in the Gaia team and which was not published Note (5): Tycho-2 identifier (idTYCHO): These are the IDs as published in Tycho2. TYCHO-2 objects are identified by 3 numbers (TYC1,TYC2 and TYC3) and we have combined these into one complete number given by (TYC1*1000000.0d0)+(TYC2*10.0d0)+(TYC3*1.0d0). Due to an error in the inclusion of HIPPARCOS stars some HIPPARCOS objects have a TYCHO2 identifier of 9999999000000+HIPARCOS number. For the most part these should be used (when idHIP is null) but some times they are included as they were HIPPARCOS targets not found in Tycho-2. Note (6): 2MASS identifier (idTMASS): 2MASS provides indentifiers in a IAU standardized format as 2MASS JHHMMSS.S+DDMMSS.S . These are coded here as +HHMMSSSDDMMSSS. Note (7): OGLE identifier (idOGLE): The OGLE ID is given by a combination of A region of sky identifier (RI) equal to 10, 11, 12, 13, 14 corresponding to map names blg, car, cen, lmc, mus. So the ID here is defined as the file running number (NNN.N), the running number in the file (RN) combined as: long(string(RI)+string(NNN.N * 10000))+RN.
History: Data received from Richard Smart Acknowledgements: Richard Smart [OATo/INAF, Italy]
(End) Arnaud Siebert, Thomas Boch [CDS] 15-Nov-2013
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