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Details - ELT Guide Star Catalogue

Title ELT Guide Star Catalogue
Version 1
Data Provider/P.I. Giacomo Beccari
Data Collection ELT-GSC
Data Release DR1
Submission Date 2026-06-29
Publication Date 2026-06-30
Description Reference catalogue that will support guiding and adaptive-optics ELT's operations. It is built on JWST GSC3.1, which combines Gaia DR3 astrometry and photometry with measurements from 2MASS, Pan-STARRS, SDSS, SkyMapper, the NOIRLab Source Catalog, VVV/VIRAC and Galactic Nucleus surveys. It is limited to Dec<30 deg and adds synthetic 2MASS J, H and Ks mag, flags identifying sources, Teff.
Please refer to the full data release description for further information.
Telescope
Instrument
Technique of Observation
Start of Observations 0 ()
End of Observations 0 ()
Filter Set/bands
Sky Solid Angle 30
Number of Records 2960508320
Number of Columns 142
Reference
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 Paranal Observatories under programme ID(s) null
Position Name Description Data Type Data Size UCD Physical Unit
1 HSTID GSC2 Public ID STRING 10 meta.id;meta.main
2 RA Right Ascension DOUBLE 1 pos.eq.ra;meta.main deg
3 DE Declination DOUBLE 1 pos.eq.dec;meta.main deg
4 EPOCH Epoch of coordinate FLOAT 1 time.epoch;obs yr
5 RAERR RA error FLOAT 1 stat.error;pos.eq.ra mas
6 DECERR DEC error FLOAT 1 stat.error;pos.eq.dec mas
7 POSSOURCE Object coordinates source INT16 1 meta.id;meta.dataset
8 RAPM RA proper motion FLOAT 1 pos.pm;pos.eq.ra mas/yr
9 DECPM DEC proper motion FLOAT 1 pos.pm;pos.eq.dec mas/yr
10 RAPMERR RA proper motion error FLOAT 1 stat.error;pos.pm;pos.eq.ra mas/yr
11 DECPMERR DEC proper motion error FLOAT 1 stat.error;pos.pm;pos.eq.dec mas/yr
12 PMSOURCE Proper motion source INT16 1 meta.id;meta.dataset
13 PARALLAX Parallax FLOAT 1 pos.parallax mas
14 PLXERR Parallax error FLOAT 1 stat.error;pos.parallax mas
15 PLXSOURCE Parallax source INT16 1 pos.parallax
16 RADIALVELOCITY Radial velocity FLOAT 1 spect.dopplerVeloc km/s
17 RVERR Radial velocity error FLOAT 1 stat.error;spect.dopplerVeloc km/s
18 RVSOURCE Source of radial velocity INT16 1 meta.id;meta.dataset
19 CLASSIFICATION Object classification code INT16 1 meta.code.class;src.class
20 CLASSSOURCE Classification source INT16 1 meta.id;meta.dataset
21 VARIABLEFLAG Flag for known variable INT16 1 meta.code.status
22 VARSOURCE Variable object source INT16 1 meta.id;meta.dataset
23 VARRANGE Largest variability in mag bands FLOAT 1 src.var.amplitude mag
24 MULTIPLEFLAG Flag for known multiple INT16 1 meta.code.class
25 MULTSOURCE Multiple Object source INT16 1 meta.id;meta.dataset
26 GAIAGMAG GAIA G magnitude FLOAT 1 phot.mag;em.opt.v mag
27 GAIAGMAGERR GAIA G magnitude error FLOAT 1 stat.error;phot.mag;em.opt.v mag
28 GAIAGMAGCODE GAIA G bandpass code INT16 1 instr.bandpass
29 GAIABPMAG GAIA Bp magnitude FLOAT 1 phot.mag;em.opt.b mag
30 GAIABPMAGERR GAIA Bp magnitude error FLOAT 1 stat.error;phot.mag;em.opt.b mag
31 GAIABPMAGCODE GAIA Bp bandpass code INT16 1 instr.bandpass
32 GAIARPMAG GAIA Rp magnitude FLOAT 1 phot.mag;em.opt.b mag
33 GAIARPMAGERR GAIA Rp magnitude error FLOAT 1 stat.error;phot.mag;em.opt.b mag
34 GAIARPMAGCODE GAIA Rp bandpass code INT16 1 instr.bandpass
35 GAIARVSMAG GAIA Rvs magnitude FLOAT 1 phot.mag;em.opt.v mag
36 GAIARVSMAGERR GAIA Rvs magnitude error FLOAT 1 stat.error;phot.mag;em.opt.v mag
37 GAIARVSMAGCODE GAIA Rvs bandpass code INT16 1 instr.bandpass
38 SDSSUMAG SDSS u band magnitude FLOAT 1 phot.mag;em.opt.U mag
39 SDSSUMAGERR SDSS u band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.U mag
40 SDSSUMAGCODE SDSS u band bandpass code INT16 1 instr.bandpass
41 SDSSUMAGSOURCE SDSS u band source INT16 1 meta.id;meta.dataset
42 SDSSGMAG SDSS g band magnitude FLOAT 1 phot.mag;em.opt.B mag
43 SDSSGMAGERR SDSS g band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.B mag
44 SDSSGMAGCODE SDSS g band bandpass code INT16 1 instr.bandpass
45 SDSSGMAGSOURCE SDSS g band source INT16 1 meta.id;meta.dataset
46 SDSSRMAG SDSS r band magnitude FLOAT 1 phot.mag;em.opt.R mag
47 SDSSRMAGERR SDSS r band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.R mag
48 SDSSRMAGCODE SDSS r band bandpass code INT16 1 instr.bandpass
49 SDSSRMAGSOURCE SDSS r band source INT16 1 meta.id;meta.dataset
50 SDSSIMAG SDSS i band magnitude FLOAT 1 phot.mag;em.opt.I mag
51 SDSSIMAGERR SDSS i band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.I mag
52 SDSSIMAGCODE SDSS i band bandpass code INT16 1 instr.bandpass
53 SDSSIMAGSOURCE SDSS i band source INT16 1 meta.id;meta.dataset
54 SDSSZMAG SDSS z band magnitude FLOAT 1 phot.mag;em.opt.I mag
55 SDSSZMAGERR SDSS z band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.I mag
56 SDSSZMAGCODE SDSS z band bandpass code INT16 1 instr.bandpass
57 SDSSZMAGSOURCE SDSS z band source INT16 1 meta.id;meta.dataset
58 SMSSVMAG SMSS v band magnitude FLOAT 1 phot.mag;em.opt.V mag
59 SMSSVMAGERR SMSS v band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.V mag
60 SMSSVMAGCODE SMSS v band bandpass code INT16 1 instr.bandpass
61 SMSSVMAGSOURCE SMSS v band source INT16 1 meta.id;meta.dataset
62 NSCVRMAG NOIRlab VR band magnitude FLOAT 1 phot.mag;em.opt.V mag
63 NSCVRMAGERR NOIRlab VR band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.V mag
64 NSCVRMAGCODE NOIRlab VR band bandpass code INT16 1 instr.bandpass
65 NSCVRMAGSOURCE NOIRlab VR band source INT16 1 meta.id;meta.dataset
66 PS1YMAG PanSTARRs y band magnitude FLOAT 1 phot.mag;em.opt.V mag
67 PS1YMAGERR PanSTARRs y band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.V mag
68 PS1YMAGCODE PanSTARRs y band bandpass code INT16 1 instr.bandpass
69 PS1YMAGSOURCE PanSTARRs y band source INT16 1 meta.id;meta.dataset
70 TMASSJMAG 2MASS J band magnitude FLOAT 1 phot.mag;em.IR.J mag
71 TMASSJMAGERR 2MASS J band magnitude error FLOAT 1 stat.error;phot.mag;em.IR.J mag
72 TMASSJMAGCODE 2MASS J band bandpass code INT16 1 instr.bandpass
73 TMASSJMAGSOURCE 2MASS J band source INT16 1 meta.id;meta.dataset
74 TMASSHMAG 2MASS H band magnitude FLOAT 1 phot.mag;em.IR.H mag
75 TMASSHMAGERR 2MASS H band magnitude error FLOAT 1 stat.error;phot.mag;em.IR.H mag
76 TMASSHMAGCODE 2MASS H band bandpass code INT16 1 instr.bandpass
77 TMASSHMAGSOURCE 2MASS H band source INT16 1 meta.id;meta.dataset
78 TMASSKSMAG 2MASS Ks band magnitude FLOAT 1 phot.mag;em.IR.K mag
79 TMASSKSMAGERR 2MASS Ks band magnitude error FLOAT 1 stat.error;phot.mag;em.IR.K mag
80 TMASSKSMAGCODE 2MASS Ks band bandpass code INT16 1 instr.bandpass
81 TMASSKSMAGSOURCE 2MASS Ks band source INT16 1 meta.id;meta.dataset
82 VISTAZMAG VISTA Ks band magnitude FLOAT 1 phot.mag;em.IR.NIR mag
83 VISTAZMAGERR VISTA Ks band magnitude error FLOAT 1 stat.error;phot.mag;em.IR.NIR mag
84 VISTAZMAGCODE VISTA Ks band bandpass code INT16 1 instr.bandpass
85 VISTAZMAGSOURCE VISTA Ks band source INT16 1 meta.id;meta.dataset
86 VISTAYMAG VISTA Y band magnitude FLOAT 1 phot.mag;em.IR.NIR mag
87 VISTAYMAGERR VISTA Y band magnitude error FLOAT 1 stat.error;phot.mag;em.IR.NIR mag
88 VISTAYMAGCODE VISTA Y band bandpass code INT16 1 instr.bandpass
89 VISTAYMAGSOURCE VISTA Y band source INT16 1 meta.id;meta.dataset
90 UMAG Johnson U band magnitude FLOAT 1 phot.mag;em.opt.U mag
91 UMAGERR Johnson U band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.U mag
92 UMAGCODE Johnson U band bandpass code INT16 1 instr.bandpass
93 UMAGSOURCE Johnson U band source INT16 1 meta.id;meta.dataset
94 BMAG Johnson B band magnitude FLOAT 1 phot.mag;em.opt.B mag
95 BMAGERR Johnson B band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.B mag
96 BMAGCODE Johnson B band bandpass code INT16 1 instr.bandpass
97 BMAGSOURCE Johnson B band source INT16 1 meta.id;meta.dataset
98 VMAG Johnson V band magnitude FLOAT 1 phot.mag;em.opt.V mag
99 VMAGERR Johnson V band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.V mag
100 VMAGCODE Johnson V band bandpass code INT16 1 instr.bandpass
101 VMAGSOURCE Johnson V band source INT16 1 meta.id;meta.dataset
102 RMAG Johnson R band magnitude FLOAT 1 phot.mag;em.opt.R mag
103 RMAGERR Johnson R band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.R mag
104 RMAGCODE Johnson R band bandpass code INT16 1 instr.bandpass
105 RMAGSOURCE Johnson R band source INT16 1 meta.id;meta.dataset
106 IMAG Johnson I band magnitude FLOAT 1 phot.mag;em.opt.I mag
107 IMAGERR Johnson I band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.I mag
108 IMAGCODE Johnson I band bandpass code INT16 1 instr.bandpass
109 IMAGSOURCE Johnson I band source INT16 1 meta.id;meta.dataset
110 OPGMAG Photographic O band magnitude FLOAT 1 phot.mag;em.opt.B mag
111 OPGMAGERR Photographic O band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.B mag
112 OPGMAGCODE Photographic O band bandpass code INT16 1 instr.bandpass
113 JPGMAG Photographic Blue band magnitude FLOAT 1 phot.mag;em.opt.B mag
114 JPGMAGERR Photographic Blue band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.B mag
115 JPGMAGCODE Photographic Blue band bandpass code INT16 1 instr.bandpass
116 VPGMAG Photographic V band magnitude FLOAT 1 phot.mag;em.opt.V mag
117 VPGMAGERR Photographic V band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.V mag
118 VPGMAGCODE Photographic V band bandpass code INT16 1 instr.bandpass
119 FPGMAG Photographic Red band magnitude FLOAT 1 phot.mag;em.opt.R mag
120 FPGMAGERR Photographic Red band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.R mag
121 FPGMAGCODE Photographic Red bandpass code INT16 1 instr.bandpass
122 EPGMAG Photographic Red band magnitude FLOAT 1 phot.mag;em.opt.R mag
123 EPGMAGERR Photographic Red band magnitude error FLOAT 1 stat.error;phot.mag;em.opt.R mag
124 EPGMAGCODE Photographic Red bandpass code INT16 1 instr.bandpass
125 NPGMAG Photographic Near-IR magnitude FLOAT 1 phot.mag;em.opt.I mag
126 NPGMAGERR Photographic Near-IR magnitude error FLOAT 1 stat.error;phot.mag;em.opt.I mag
127 NPGMAGCODE Photographic Near-IR bandpass code INT16 1 instr.bandpass
128 GSC1ID GSC1 Public ID - 5 char Reg. Num. + 5 char Seq. Num. STRING 10 meta.id.cross
129 GSC2ID GSC2 Internal ID - HTML L6 Reg. Name + Seq. Num. STRING 15 meta.id
130 COMPASSGSC2ID GSC2 Internal ID - integer representation of gsc2id INT64 1 meta.id
131 GAIADR3SOURCEID GAIA edr3/dr3 ID STRING 20 meta.id
132 HTMID Hierarchical Triangulated Mesh L10 id INT64 1 pos.HTM
133 OBJID Database ID INT64 1 meta.record
134 RANDOM_INDEX random value between 0.0 and 1.0 for sampling DOUBLE 1 meta.code
135 STAR_FLAG Stellarity classification code INT64 1 meta.code
136 TEFFOBS Observed effective temperature DOUBLE 1 phys.temperature.effective K
137 TEFFOBS_REC Observed effective temperature Source STRING 8 meta.code
138 JSYNTMAG Synthetic J magnitude - from SDSS FLOAT 1 meta.code mag
139 HSYNTMAG Synthetic H magnitude - from SDSS FLOAT 1 meta.code mag
140 KSYNTMAG Synthetic K magnitude - from SDSS FLOAT 1 meta.code mag
141 GS_FLAG Guide star Flag INT64 1 meta.code
142 AO_FLAG NGS Flag INT64 1 meta.code