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Start Over Subject astrometry Publisher The GAVO DC team
21. 2Mass Query
ID:
ivo://org.gavo.dc/2mass/res/2mass/q
Title:
2Mass Query
Short Name:
twomass_q
Date:
27 Dec 2024 08:31:04
Publisher:
The GAVO DC team
Description:
The 2MASS Point Source Catalogue, short a couple of exotic fields. We provide this data mainly for matching with other catalogs within our TAP service.
22. PPMX query
ID:
ivo://org.gavo.dc/ppmx/res/ppmx/scs
Title:
PPMX query
Short Name:
ppmx_scs
Date:
27 Dec 2024 08:31:00
Publisher:
The GAVO DC team
Description:
PPM-Extended (PPMX) is a catalogue of 18 088 919 stars on the ICRS system containing astrometric and photometric information. Its limiting magnitude is about 15.2 in the GSC photometric system.
23. SDSS DR7 PhotoObjAll
ID:
ivo://org.gavo.dc/sdssdr7/q/sources
Title:
SDSS DR7 PhotoObjAll
Short Name:
sdssdr7.sources
Date:
27 Dec 2024 08:31:01
Publisher:
The GAVO DC team
Description:
This is the result of the query:: select objID, field.run, field.rerun, field.camcol, field.fieldId, obj, ra, dec, raErr, decErr, raDecCorr, offsetRa_u, offsetRa_g, offsetRa_r, offsetRa_i, offsetRa_z, offsetDec_u, offsetDec_g, offsetDec_r, offsetDec_i, offsetDec_z, u, g, r, i, z, err_u, err_g, err_r, err_i, err_z, mjd_u, mjd_g, mjd_r, mjd_i, mjd_z from PhotoObjAll join field on (field.fieldId=PhotoObjAll.fieldId) on SDSS DR7, kindly provided by the Potsdam mirror. All angular quantities are given in degrees here.
24. SuperCOSMOS Sources
ID:
ivo://org.gavo.dc/supercosmos/q/s
Title:
SuperCOSMOS Sources
Short Name:
supercosmos scs
Date:
27 Dec 2024 08:31:02
Publisher:
The GAVO DC team
Description:
The SuperCOSMOS data primarily originate from scans of the UK Schmidt and Palomar POSS II blue, red and near-IR sky surveys. The ESO Schmidt R (dec < -17.5) and Palomar POSS-I E (dec > -17.5) surveys have also been scanned and provide an early (1st) epoch red measurement. Mirrored here is the source table containing four-plate multi-colour, multi-epoch data which are merged into a single source catalogue for general science exploitation. Within the GAVO DC, some column names have been adapted to local customs (primarily positions, proper motions).
25. TGAS catalogue
ID:
ivo://org.gavo.dc/tgas/q/main
Title:
TGAS catalogue
Short Name:
tgas.main
Date:
27 Dec 2024 08:31:05
Publisher:
The GAVO DC team
Description:
This table is a subset of GaiaSource comprising those stars in the Hipparcos and Tycho-2 Catalogues for which a full 5-parameter astrometric solution has been possible in Gaia Data Release 1. This is possible because the early Hipparcos epoch positions break some degeneracies due to the limited Gaia time coverage. This table contains a substantial fraction of the around 2.5 million stars in the Hipparcos and Tycho-2 catalogue. Many stars have been excluded due to several reasons, such as saturation, cross-match errors or bad astrometric solution. All rows have Gaia solution id 1635378410781933568.
26. The Fifth Catalogue of Nearby Stars (CNS5)
ID:
ivo://org.gavo.dc/cns5/q/cone
Title:
The Fifth Catalogue of Nearby Stars (CNS5)
Short Name:
CNS5
Date:
27 Dec 2024 08:31:04
Publisher:
The GAVO DC team
Description:
The Fifth Catalogue of Nearby Stars (CNS5) aims to provide the most volume-complete sample of stars in the solar neighbourhood. The CNS5 is compiled based on trigonometric parallaxes from Gaia EDR3 and Hipparcos, and supplemented with astrometric data from Spitzer and ground-based surveys carried out in the infrared. The CNS5 catalogue is statistically complete down to 19.7 mag in G-band and 11.8 mag in W1-band absolute magnitudes, corresponding to a spectral type of L8. Continuous updates of observational data for nearby stars from all sources were collected and evaluated. For all known stars in the 25 pc sphere around the Sun, the best values of positions in space, velocities, and magnitudes in different filters are presented.
27. The fifth U.S. Naval Observatory CCD Astrograph Catalog (UCAC5)
ID:
ivo://org.gavo.dc/ucac5/q/cone
Title:
The fifth U.S. Naval Observatory CCD Astrograph Catalog (UCAC5)
Short Name:
UCAC 5
Date:
27 Dec 2024 08:31:04
Publisher:
The GAVO DC team
Description:
New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8 to 11 magnitude range as reference star catalog. Significant improvements in the astrometric solutions were obtained and the UCAC5 catalog of mean positions at a mean epoch near 2001 was generated. By combining UCAC5 with Gaia DR1 data new proper motions on the Gaia coordinate system for over 107 million stars were obtained with typical accuracies of 1 to 2 mas/yr (R = 11 to 15 mag), and about 5 mas/yr at 16th mag. Proper motions of most TGAS stars are improved over their Gaia data and the precision level of TGAS proper motions is extended to many millions more, fainter stars. The database table uses actual NULLs for missing photometry, and all angular coordinates have been homogenised to degrees.
28. The first U.S. Naval Observatory Astrometric Robotic Telescope Catalog URAT1 star catalog
ID:
ivo://org.gavo.dc/urat1/q/main
Title:
The first U.S. Naval Observatory Astrometric Robotic Telescope Catalog URAT1 star catalog
Short Name:
urat1.main
Date:
27 Dec 2024 08:31:00
Publisher:
The GAVO DC team
Description:
URAT1 is an observational catalog at a mean epoch between 2012.3 and 2014.6; ot covers the magnitude range 3 to 18.5 in R-band, with a positional precision of 5 to 40 mas. It covers most of the northern hemisphere and some areas down to -24.8° in declination. In the GAVO data center, we left out all columns originating from cross matches with other catalogs; on-the fly crossmatches can be done in our TAP service.
29. The fourth U.S. Naval Observatory CCD Astrograph Catalog (UCAC4)
ID:
ivo://org.gavo.dc/ucac4/q/s
Title:
The fourth U.S. Naval Observatory CCD Astrograph Catalog (UCAC4)
Short Name:
ucac4 scs
Date:
27 Dec 2024 08:31:12
Publisher:
The GAVO DC team
Description:
UCAC4 is a compiled, all-sky star catalog covering mainly the 8 to 16 magnitude range in a single bandpass between V and R. Positional errors are about 15 to 20 mas for stars in the 10 to 14 mag range. Proper motions have been derived for most of the about 113 million stars utilizing about 140 other star catalogs with significant epoch difference to the UCAC CCD observations. These data are supplemented by 2MASS photometric data for about 110 million stars and 5-band (B,V,g,r,i) photometry from the APASS (AAVSO Photometric All-Sky Survey) for over 50 million stars. UCAC4 also contains error estimates and various flags. All bright stars not observed with the astrograph have been added to UCAC4 from a set of Hipparcos and Tycho-2 stars. Thus UCAC4 should be complete from the brightest stars to about R=16, with the source of data indicated in flags.
30. The Gaia-PS1-SDSS (GPS1) Proper Motion Catalog
ID:
ivo://org.gavo.dc/gps1/q/cone
Title:
The Gaia-PS1-SDSS (GPS1) Proper Motion Catalog
Short Name:
GPS1
Date:
27 Dec 2024 08:31:00
Publisher:
The GAVO DC team
Description:
This catalog combines Gaia DR1, Pan-STARRS 1, SDSS and 2MASS astrometry to compute proper motions for 350 million sources across three-fourths of the sky down to a magnitude of mr≈20. Positions of galaxies from Pan-STARRS 1 are used to build a reference frame for PS1, SDSS, and 2MASS data. Gaia DR1 is adapted to that reference frame by exploiting that locally, proper motions are linear. GPS1 has a characteristic systematic error of less than 0.3 mas/yr, and a typical precision of 1.5−2.0 mas/yr. The proper motions have been validated using galaxies, open clusters, distant giant stars and QSOs. In comparison with other published faint proper motion catalogs, GPS1's systematic error (<0.3 mas/yr) is about 10 times better than that of PPMXL and UCAC4 (>2.0 mas/yr). Similarly, its precision (~1.5 mas/yr) is an improvement by ∼ 4 times relative to PPMXL and UCAC4 (∼6.0 mas/yr). For QSOs, the precision of GPS1 is found to be worse (∼2.0−3.0 mas/yr), possibly due to their particular differential chromatic refraction (DCR).

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