II/364          VIRAC. The VVV Infrared Astrometric Catalogue    (Smith+, 2019)

VIRAC: the VVV Infrared Astrometric Catalogue. Smith L.C., Lucas P.W., Kurtev R., Smart R., Minniti D., Borissova J., Jones H.R.A., Zhang Z.H., Marocco F., Contreras Pena C., Gromadzki M., Kuhn M.A., Drew J.E., Pinfield D.J., Bedin L.R. <Mon. Not. R. Astron. Soc., 474, 1826-1849 (2018)> =2018MNRAS.474.1826S =2020yCat.2364....0S
ADC_Keywords: Surveys ; Infrared sources ; Photometry, infrared ; Proper motions ; Parallaxes, trigonometric Mission_Name: ESO Keywords: parallaxes - proper motions - brown dwarfs - stars: kinematics and dynamics - Galaxy: kinematics and dynamics - solar neighbourhood Abstract: We present VIRAC version 1, a near-infrared proper motion and parallax catalogue of the VISTA Variables in the Via Lactea (VVV) survey for 312587642 unique sources averaged across all overlapping pawprint and tile images covering 560deg2 of the bulge of the Milky Way and southern disc. The catalogue includes 119 million high-quality proper motion measurements, of which 47 million have statistical uncertainties below 1mas/yr. In the 11<Ks<14 magnitude range, the high-quality motions have a median uncertainty of 0.67mas/yr. The catalogue also includes 6935 sources with quality-controlled 5σ parallaxes with a median uncertainty of 1.1mas. The parallaxes show reasonable agreement with the Tycho-Gaia Astrometric Solution, though caution is advised for data with modest significance. The SQL data base housing the data is made available via the web. We give example applications for studies of Galactic structure, nearby objects (low-mass stars and brown dwarfs, subdwarfs, white dwarfs) and kinematic distance measurements of young stellar objects. Nearby objects discovered include LTT 7251 B, an L7 benchmark companion to a G dwarf with over 20 published elemental abundances, a bright L subdwarf, VVV 1256-6202, with extremely blue colours and nine new members of the 25pc sample. We also demonstrate why this catalogue remains useful in the era of Gaia. Future versions will be based on profile fitting photometry, use the Gaia absolute reference frame and incorporate the longer time baseline of the VVV extended survey. Description: The VVV Infrared Astrometric Catalog (VIRAC) collects the proper motion measurements based on the VISTA Variables in the Via Lactea (VVV) survey data. It provides ZYJHKs bandmerged magnitudes for each star. For the multi-epoch observations in the Ks band the magnitude is a mean value. Typical precision of the pm measurements are of 0.67mas/yr for bright stars (11<Ks<14). The details of the observations are the following: Telescope: ESO-VISTA Instrument: VIRCAM Technique of Observation: IMAGE,JITTER Start of Observations: 55,228.136 (2010-02-01T15:15:54) End of Observations: 57,291.072 (2015-09-26T13:43:45) Filter Set/bands: Ks Z Y J H Sky Solid Angle: 560deg2 Number of Records: 312587642 The auxiliary tables include: - 555 visually confirmed high proper motion sources with µ>200mas/yr and σµ<5mas/yr are presented in Table A1. - A selection of 6935 'arallax sources measured at 5sigma (Table B1). - 10 objects whose VIRAC parallaxes make them members of the 25pc volume limit sample (Table C1). - 28 pairs of bona fide VVV common proper motion companions to TGAS sources (Table D1). - 53 pairs of TGAS-VIRAC common proper motion and parallax companions, where the VIRAC component is in the 11<Ks<14 range (Table D2, see also Fig.13 in the article). - 18 luminosity selected promising L0-T2 dwarf candidates (Table E1). - 66 early L dwarf candidates (Table E2). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file virac.sam 303 1000 VIRAC catalog tablea1.dat 123 555 High proper motion sources confirmed by visual inspection tableb1.dat 135 6935 Parallax sources measured at 5σ tablec1.dat 118 10 VIRAC sources whose parallaxes place them within 25pc tabled1.dat 123 56 VIRAC common proper motion companions to TGAS high proper motion sources tabled2.dat 123 106 TGAS-VIRAC common proper motion and parallax companions tablee1.dat 131 18 L0-T2 dwarf candidates from our parallax catalogue based on NIR colours and Ks-band luminosity tablee2.dat 131 66 Early L dwarf candidates from our proper motion catalogue selected based on mu>30mas/yr and NIR colours
See also: II/337 : VISTA Variables in the Via Lactea Survey DR1 (Saito+, 2012) II/348 : VISTA Variables in the Via Lactea Survey DR2 (Minniti+, 2017) Byte-by-byte Description of file: virac.sam
Bytes Format Units Label Explanations
1- 9 I9 --- srcid Unique source identifier (sourceid) 11- 20 F10.6 deg RAdeg Right ascension from astrometric fit (ICRS) at epoch 2012.0 (ra) 22- 31 F10.6 deg DEdeg Declination from astrometric fit (ICRS) at epoch 2012.0 (de) 33- 38 F6.3 mag Ksmag Ks band magnitude (mag) 40- 45 F6.3 mag e_Ksmag Error on Ks band magnitude (emag) 47- 51 F5.1 --- KsEll Mean Ks band ellipticity (ell) 53- 62 F10.2 mas/yr pm Total proper motion 64- 76 F13.2 mas/yr e_pm Error on total proper motion (epm) 78- 88 F11.2 mas/yr pmRA Proper motion in RA, pmRA*cosDE (rapm) 90-102 F13.2 mas/yr e_pmRA Error on proper motion in pmRA*cosDE (erapm) 104-114 F11.3 mas/yr pmDE Proper motion in Declination (depm) 116-129 F14.3 mas/yr e_pmDE Error on proper motion in Declination (depm) 131-134 I4 --- Nep Total number of epochs (epochs) 136-137 I2 --- Ndet [1/21] Number of pawprint sets/epoch groups (dets) 139-140 I2 --- Nsdet [0/15] Number of stellar pawprint sets (stellardets) 142 I1 --- Npdet [1/9] Number of pawprint sets detected (pawprintdets) 144-145 I2 --- Nf0 [0/13] Number of '0' pm error flags (nepmf0) 147-148 I2 --- Nf1 [0/14] Number of '1' pm error flags (nepmf1) 150-151 I2 --- Nf2 [0/19] Number of '2' pm error flags (nepmf2) 153-154 I2 --- Nf3 Number of '3' pm error flags (nepmf3) 156 I1 --- flgrel [0/1] Reliability flag: '1' is reliable (reliable) 158-164 F7.3 mag Zmag ? VVV DR4 Z band magnitude. 166-171 F6.3 mag e_Zmag ? Error on VVV DR4 Z band magnitude (eZmag) 173-178 F6.4 --- Zell ? Ellipticity of Z band detection. 180-182 I3 --- Zclass [-9/10]?=-99 Z band morphological classification 184-191 F8.6 arcsec Zsep ? Distance to Z band detection 193-199 F7.3 mag Ymag ? VVV DR4 Y band magnitude. 201-206 F6.3 mag e_Ymag ? Error on VVV DR4 Y band magnitude (eYmag) 208-213 F6.4 --- Yell ? Ellipticity of Y band detection. 215-217 I3 --- Yclass [-9/10]?=-99 Y band morphological classification 219-226 F8.6 arcsec Ysep ? Distance to Y band detection 228-233 F6.3 mag Jmag ? VVV DR4 J band magnitude. 235-240 F6.3 mag e_Jmag ? Error on VVV DR4 J band magnitude (eJmag) 242-247 F6.4 --- Jell ? Ellipticity of J band detection. 249-251 I3 --- Jclass [-9/10]?=-99 J band morphological classification 253-260 F8.6 arcsec Jsep ? Distance to J band detection 262-268 F7.3 mag Hmag ? VVV DR4 H band magnitude. 270-275 F6.3 mag e_Hmag ? Error on VVV DR4 H band magnitude (eHmag) 277-282 F6.4 --- Hell ? Ellipticity of H band detection. 284-286 I3 --- Hclass [-9/10]?=-99 H band morphological classification 288-295 F8.6 arcsec Hsep ? Distance to H band detection 297 I1 --- Zdetflg [0/2] Z detection flag, 1=not detected, 2=not observed (Zdetflag) 299 I1 --- Ydetflg [0/2] Y detection flag, 1=not detected, 2=not observed (Ydetflag) 301 I1 --- Jdetflg [0/2] J detection flag, 1=not detected, 2=not observed (Jdetflag) 303 I1 --- Hdetflg [0/2] H detection flag, 1=not detected, 2=not observed (Hdetflag)
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq [1/555] Sequential number (for this table) 5- 6 I2 h RAh Right ascension (ICRS) at Ep=2015.0 8- 9 I2 min RAm Right ascension (ICRS) at Ep=2015.0 11- 15 F5.2 s RAs Right ascension (ICRS) at Ep=2015.0 17 A1 --- DE- Declination sign (ICRS) at Ep=2015.0 18- 19 I2 deg DEd Declination (ICRS) at Ep=2015.0 21- 22 I2 arcmin DEm Declination (ICRS) at Ep=2015.0 24- 28 F5.2 arcsec DEs Declination (ICRS) at Ep=2015.0 30- 36 F7.2 mas/yr pmRA* Proper motion along RA, pmRA*cosDE 38- 41 F4.2 mas/yr e_pmRA* rms uncertainty on pmRA* 43- 49 F7.2 mas/yr pmDE Proper motion along DE 51- 54 F4.2 mas/yr e_pmDE rms uncertainty on pmDE 56- 60 F5.2 mag Zmag ? Z magnitude 62- 65 F4.2 mag e_Zmag ? rms uncertainty on Zmag 66 A1 --- n_Zmag [c] c for no coverage 68- 72 F5.2 mag Ymag ? Y magnitude 74- 77 F4.2 mag e_Ymag ? rms uncertainty on Ymag 78 A1 --- n_Ymag [c] c for no coverage 80- 84 F5.2 mag Jmag ? J magnitude 86- 89 F4.2 mag e_Jmag ? rms uncertainty on Jmag 90 A1 --- n_Jmag [c] c for no coverage 92- 96 F5.2 mag Hmag ? H magnitude 98-101 F4.2 mag e_Hmag ? rms uncertainty on Hmag 102 A1 --- n_Hmag [c] c for no coverage 104-108 F5.2 mag Ksmag Ks magnitude 110-113 F4.2 mag e_Ksmag rms uncertainty on Ksmag 115-123 I9 --- srcid Source ID from VIRAC catalog
Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq [1/6935] Sequential number (for this table) 6- 7 I2 h RAh Right ascension (ICRS) at Ep=2015.0 9- 10 I2 min RAm Right ascension (ICRS) at Ep=2015.0 12- 16 F5.2 s RAs Right ascension (ICRS) at Ep=2015.0 18 A1 --- DE- Declination sign (ICRS) at Ep=2015.0 19- 20 I2 deg DEd Declination (ICRS) at Ep=2015.0 22- 23 I2 arcmin DEm Declination (ICRS) at Ep=2015.0 25- 29 F5.2 arcsec DEs Declination (ICRS) at Ep=2015.0 31- 37 F7.2 mas/yr pmRA* Proper motion along RA, pmRA*cosDE 39- 43 F5.2 mas/yr e_pmRA* rms uncertainty on pmRA* 45- 51 F7.2 mas/yr pmDE Proper motion along DE 53- 57 F5.2 mas/yr e_pmDE rms uncertainty on pmDE 59- 62 F4.1 mas plx ? Parallax 64- 66 F3.1 mas e_plx ? rms uncertainty on plx 68- 72 F5.2 mag Zmag ? Z magnitude 74- 77 F4.2 mag e_Zmag ? rms uncertainty on Zmag 78 A1 --- n_Zmag [c] c for no coverage, d for no detection 80- 84 F5.2 mag Ymag ? Y magnitude 86- 89 F4.2 mag e_Ymag ? rms uncertainty on Ymag 90 A1 --- n_Ymag [c] c for no coverage, d for no detection 92- 96 F5.2 mag Jmag ? J magnitude 98-101 F4.2 mag e_Jmag ? rms uncertainty on Jmag 102 A1 --- n_Jmag [c] c for no coverage, d for no detection 104-108 F5.2 mag Hmag ? H magnitude 110-113 F4.2 mag e_Hmag ? rms uncertainty on Hmag 114 A1 --- n_Hmag [c] c for no coverage, d for no detection 116-120 F5.2 mag Ksmag Ks magnitude 122-125 F4.2 mag e_Ksmag rms uncertainty on Ksmag 127-135 I9 --- srcid Source ID from VIRAC catalog
Byte-by-byte Description of file: tablec1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq [1/10] Sequential number (for this table) 4- 5 I2 h RAh Right ascension (ICRS) at Ep=2015.0 7- 8 I2 min RAm Right ascension (ICRS) at Ep=2015.0 10- 14 F5.2 s RAs Right ascension (ICRS) at Ep=2015.0 16 A1 --- DE- Declination sign (ICRS) at Ep=2015.0 17- 18 I2 deg DEd Declination (ICRS) at Ep=2015.0 20- 21 I2 arcmin DEm Declination (ICRS) at Ep=2015.0 23- 27 F5.2 arcsec DEs Declination (ICRS) at Ep=2015.0 29- 35 F7.2 mas/yr pmRA* Proper motion along RA, pmRA*cosDE 37- 40 F4.2 mas/yr e_pmRA* rms uncertainty on pmRA* 42- 48 F7.2 mas/yr pmDE Proper motion along DE 50- 53 F4.2 mas/yr e_pmDE rms uncertainty on pmDE 55- 58 F4.1 mas plx ? Parallax 60- 62 F3.1 mas e_plx ? rms uncertainty on plx 64- 68 F5.2 mag Zmag ? Z magnitude 70- 73 F4.2 mag e_Zmag ? rms uncertainty on Zmag 74 A1 --- n_Zmag [c] c for no coverage 76- 80 F5.2 mag Ymag Y magnitude 82- 85 F4.2 mag e_Ymag rms uncertainty on Ymag 87- 91 F5.2 mag Jmag J magnitude 93- 96 F4.2 mag e_Jmag rms uncertainty on Jmag 98-102 F5.2 mag Hmag H magnitude 104-107 F4.2 mag e_Hmag rms uncertainty on Hmag 109-113 F5.2 mag Ksmag Ks magnitude 115-118 F4.2 mag e_Ksmag rms uncertainty on Ksmag
Byte-by-byte Description of file: tabled1.dat tabled2.dat
Bytes Format Units Label Explanations
1- 20 A20 --- Name Name 22- 23 I2 h RAh Right ascension (ICRS) at Ep=2015.0 25- 26 I2 min RAm Right ascension (ICRS) at Ep=2015.0 28- 32 F5.2 s RAs Right ascension (ICRS) at Ep=2015.0 34 A1 --- DE- Declination sign (ICRS) at Ep=2015.0 35- 36 I2 deg DEd Declination (ICRS) at Ep=2015.0 38- 39 I2 arcmin DEm Declination (ICRS) at Ep=2015.0 41- 45 F5.2 arcsec DEs Declination (ICRS) at Ep=2015.0 47- 53 F7.2 mas/yr pmRA* Proper motion along RA, pmRA*cosDE 55- 59 F5.2 mas/yr e_pmRA* rms uncertainty on pmRA* 61- 67 F7.2 mas/yr pmDE Proper motion along DE 69- 73 F5.2 mas/yr e_pmDE rms uncertainty on pmDE 75- 79 F5.2 mas Plx ? Gaia parallax (only for component A) 81- 84 F4.2 mas e_Plx ? rms uncertainty on Plx (only for component A) 86- 90 F5.2 mag Gmag ? Gaia G magnitude (only for component A) 92- 96 F5.2 mag Ksmag ? Ks magnitude 98-101 F4.2 mag e_Ksmag ? rms uncertainty on Ksmag 103-107 F5.2 mag KsMAG ? Absolute Ks magnitude 109-112 F4.2 mag e_KsMAG ? rms uncertainty on Ksmag (only in table D2) 114-117 F4.1 arcsec rho ? Angular separation (only for component A) 119-123 I5 AU rhoAU ? Linear separation (only for component A)
Byte-by-byte Description of file: tablee1.dat tablee2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq Sequential number (within the table) 4- 5 I2 h RAh Right ascension (ICRS) at Ep=2015.0 7- 8 I2 min RAm Right ascension (ICRS) at Ep=2015.0 10- 14 F5.2 s RAs Right ascension (ICRS) at Ep=2015.0 16 A1 --- DE- Declination sign (ICRS) at Ep=2015.0 17- 18 I2 deg DEd Declination (ICRS) at Ep=2015.0 20- 21 I2 arcmin DEm Declination (ICRS) at Ep=2015.0 23- 27 F5.2 arcsec DEs Declination (ICRS) at Ep=2015.0 29- 35 F7.2 mas/yr pmRA* Proper motion along RA, pmRA*cosDE 37- 40 F4.2 mas/yr e_pmRA* rms uncertainty on pmRA* 42- 48 F7.2 mas/yr pmDE Proper motion along DE 50- 53 F4.2 mas/yr e_pmDE rms uncertainty on pmDE 55- 59 F5.2 mas plx ? Parallax (only in table E1) 61- 64 F4.2 mas e_plx ? rms uncertainty on plx (only in table E1) 66- 70 F5.2 mag Zmag ? Z magnitude 72- 75 F4.2 mag e_Zmag ? rms uncertainty on Zmag 76 A1 --- n_Zmag [cd] c for no coverage, d for no detection 78- 82 F5.2 mag Ymag Y magnitude 84- 87 F4.2 mag e_Ymag rms uncertainty on Ymag 89- 93 F5.2 mag Jmag J magnitude 95- 98 F4.2 mag e_Jmag rms uncertainty on Jmag 100-104 F5.2 mag Hmag H magnitude 106-109 F4.2 mag e_Hmag rms uncertainty on Hmag 111-115 F5.2 mag Ksmag Ks magnitude 117-120 F4.2 mag e_Ksmag rms uncertainty on Ksmag 122-126 F5.2 mag KsMAG ? Absolute Ks magnitude (only in table E1) 128-131 F4.2 mag e_KsMAG ? rms uncertainty on KsMAG (only in table E1)
History: Tables from electronic version of the journal Catalog from ESO, https://www.eso.org/sci/publications/announcements/sciann17222.html Acknowledgment Policy : Please include the following acknowledgment in any published material that makes use of this data products: Based on observations made with ESO Telescopes at the La Silla or Parana l Observatories under programme ID(s) 179.B-2002(A), 179.B-2002(B), 179.B-2002(C), 179.B-2002(D), 179.B-2002(E), 179.B-2002(F), 179.B-2002(G), 179.B-2002(H), 179.B-2002(I), 179.B-2002(K), 179.B-2002(L)
(End) Francois-Xavier Pineau, Patricia Vannier [CDS] 06-May-2020
The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line

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