The GAVO Data Center

The software driving this site is still under heavy development. This means that despite all regression testing you are likely to hit a snag or two. Please do contact us if that happens, we depend on your bug reports (and suggestions). Also, have a look at our site help.

Services marked with a [P] are password protected. In most cases, we will provide access data for these services on request.

Services available here

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RAdial Velocity Experiment: RAVE, second data release – Spectroscopic radial velocities for 49327 stars in the Milky-Way southern hemisphere using the 6dF instrument at the AAO. Stellar parameters are published for a set of 21121 stars belonging to the second year of observation. The data published here comprises all original RAVE data. Columns in the data release that resulted from crossmatching were left out.

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[P] 2Mass Query – The 2MASS Catalogue, short a couple of fields. The data is present here mainly for use with ADQL.

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ADQL Query – An endpoint for submitting ADQL queries to the data center and retrieving the result in various forms.
APFS HIP Simple Query – Computation of exact geocentric positions for stars from the Hipparcos catalogue.
APFS Simple Query Form – The apparent places of fundamental stars give exact geocentric positions for a selected set of FK6 stars.

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[P] Candidates for geometric lensing – A catalogue of candidate stars for geometric lensing (cf. Paczynski, 1996AcA....46..291P).
CARS source catalogue query – Images and data from from the CFHTLS archive research survey, a multi-band dataset spanning 37 square degrees of sky in high galactic latitudes.
[P] Catalogue of Nearby Stars 4 Query – A catalogue of stars closer than 30 pc
Computation of GAST, GMST, and ERA – Computation of Greenwich Apparent Sidereal Time, Greenwich Mean Sidereal Time, and the Earth Rotation Angle
Corrections between USNO-B and PPMXL – Differences between USNO-B and PPMXL in positions and proper motions, on an all-sky one-degree grid. At each gridpoint we give the differences X(PPMXL)- X(USNO-B1.0) averaged over all stars in a sqrt(2)/2-degrees environment around the gridpoint given. The corrections given here should bring USNO-B based astrometry to the ICRS.

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Delta-mu Binaries – A collection of binary stars with a difference in instantaneous proper motion as measured by HIPPARCOS and the long-term proper motion.
Dexter for your data – An interface to ADS' Dexter data extraction applet for usage with uploaded data

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Galactic OH Masers (Engels 2008) – A compilation of galactic stellar sources observed for OH maser emission in the transition at 1612, 1665, and 1667 MHz. The database contains 12725 OH maser observations at frequencies 1612, 1665, and 1667 MHz selected from the literature . These observations belong to 6245 different objects.
GAVO DC Custom Uploading Crossmatcher – A plain crossmatch service that allows file and URL uploads to be crossmatched to DC-internal tables. In general, you want to use TAP for this kind of thing when it is available, but in a pinch it might come in handy. Larger catalogues that can be matched against include 2MASS, USNO-B, PPMX, CARS, and more.

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HDAP -- Heidelberg Digitized Astronomical Plates – Scans of plates obtained at Landessternwarte Heidelberg-Königstuhl and German-Spanish Astronomical Center (Calar Alto Observatory), Spain, 1900 through 1999.

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Lens Image Archive – A collection of images of lensed quasars
Liverpool Quasar Lens Monitoring – This collection includes optical monitorings of gravitationally lensed quasars. The frames can be used to make light curves of quasar images and field objects. From quasar light curves, one may measure time delays and flux ratios, analyse variability and chromaticity, etc. These direct analyses/measurements are basic tools for different astrophysical studies, e.g., expansion rate of the Universe, mechanism of intrinsic variability in quasars, accretion disk structure, supermassive black holes, dark halos of galaxies (dust, collapsed dark matter, smoothly distributed dark matter,...)

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Magellanic Clouds Extinction Values – A catalogue of E(V-I) extinction values is presented for 3006 (LMC) and 681 (SMC) fields within the Magellanic Clouds. The extinction values were computed by determining the V-I colour of the red clump from Optical Gravitational Microlensing Experiment (OGLE III) observations in the V and I bands.
Maidanak Observatory Instrument Query – Instrument frames for the main mirror of Maidanak Observatory (Uzbekhistan)
Maidanak Observatory Object Query – Observations of (mainly) lensed quasars accessible through a selection of the target object
Maidanak Observatory SIAP Query – Observations of (mainly) lensed quasars from Maidanak Observatory, Uzbekhistan
MiNDSTEp Lens Images – TBD

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New Services in the VO RSS – New entries in the `Virtual Observatory <http://www.ivoa.net>`_'s registry in RSS format; this service lets you use a common "news aggregator" to learn of services appearing in the VO in almost real time. The data is taken from the VO registry by querying for new records twice a day. New items are announced here for 30 days. To subscribe to this feed, point your browser/news aggregator to http://vo.uni-hd.de/regrss. New entries on these feeds are also distributed using Twitter (follow germanVO) and identi.ca (follow germanvo).

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Potsdam Carte du Ciel Plates – Publication of scans of photografic plates from the so-called "Potsdam zone" of the Carte du Ciel project (32 deg to 39 deg). A total of 977 plates of 2 square degree sky regions was observed and recorded between 1913 to 1924. Since Potsdam Observatory ended participation in the Carte du Ciel project, these observations were so far not analysed or published. Plates were scanned in by a flat bed scanner in 2007-2008. Limitations in astrometric precision as well are to be expected, and specific observational restrains apply, such as multiple exposures on certain plates (see literature).
PPMX query – 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.

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The Infinite Lightcurve, Images – Images from the infinite microlensing lightcurve selectable through text queries.
The Scrolling Infinite Lightcurve – A web-based GUI to the infinite microlensing lightcurve.