Subject: stars / Capability Type: Simple Cone Search - STScI NAVO Directory Search Results

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.

ID:: ivo://svo.cab/cat/gbs
Title:: The Gaia FGK Benchmark Stars
Short Name:: Gaia Benchmarks
Date:: 03 Jun 2020 15:29:07
Publisher:: SVO/CAB
Description:: The Gaia FGK Benchmark Stars. Library of high resolution and high signal to noise ratio stellar spectra.

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).

ID:: ivo://org.gavo.dc/hsoy/q/q
Title:: The HSOY Catalog
Short Name:: HSOY SCS
Date:: 27 Dec 2024 08:31:06
Publisher:: The GAVO DC team
Description:: HSOY is a catalog of 583'001'653 objects with precise astrometry based on PPMXL and Gaia DR1. Typical formal errors at mean epoch in proper motion are below 1 mas/yr for objects brighter than 10 mag, and about 5 mas/yr at the faint end (about 20 mag). South of -30 degrees, astrometry is significantly worse. HSOY also contains, where available, USNO-B, Gaia, and 2MASS photometry. HSOY's positions and proper motions are given for epoch J2000. The catalog becomes severely incomplete faintwards of 16 mag in the G-band. The mean epochs are typically very close to Gaia's J2015. HSOY still contains about 0.7% spurious close "binaries" (non-matched stars) from the original USNO-B (marked with non-NULL clone). Also, failed matches within Gaia DR1 contribute another 1.5% spurious pairs (marked with non-NULL comp). In both cases, astrometry presumably is sub-standard. More information is available at http://dc.g-vo.org/hsoy.

ID:: ivo://svo.cab/cat/miles
Title:: The MILES stellar library
Short Name:: MILES
Date:: 03 Jun 2020 15:29:44
Publisher:: SVO/CAB
Description:: This data server provides access to the MILES spectra library.

ID:: ivo://svo.cab/cat/bdsslow
Title:: The NIRSPEC Brown Dwarf Spectroscopic Survey. Low-Resolution Data.
Short Name:: NIRSPEC
Date:: 03 Jun 2020 15:29:58
Publisher:: SVO/CAB
Description:: The NIRSPEC Brown Dwarf Spectroscopic Survey. Low-Resolution Data.

ID:: ivo://org.gavo.dc/ppmxl/q/cone
Title:: The PPMXL Catalog
Short Name:: GAVO PPMXL
Date:: 27 Dec 2024 08:31:04
Publisher:: The GAVO DC team
Description:: PPMXL is a catalog of positions, proper motions, 2MASS- and optical photometry of 900 million stars and galaxies, aiming to be complete down to about V=20 full-sky. It is the result of a re-reduction of USNO-B1 together with 2MASS to the ICRS as represented by PPMX. This service additionally provides improved proper motions computed according to Vickers et al, 2016 (:bibcode:`2016AJ....151...99V`).

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