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451. Viking 2 Biology Experiment
ID:
ivo://gov.nasa.gsfc.nssdc/viking2
Title:
Viking 2 Biology Experiment
Short Name:
Viking 2 Biology
Date:
24 Apr 2006 19:43:32
Publisher:
NASA
Description:
Viking 2 Gas Exchange, Labeled Release, and Pyrolytic Release Data on Microfilm. These data, supplied by the investigation team, are on 16- mm microfilm and consist of descriptions of the commands that were sent to operate the three instruments, and tabulations of raw and reduced data returned. The command data include: Mars time for each experiment sequence, the commands sent, predicted data points for each command file that were used to time tag the data when it came back from the instrument, and a summary of the major events of each command sequence.
452. VizieR SIA service
ID:
ivo://CDS.VizieR/siap
Title:
VizieR SIA service
Short Name:
VizieR SIA
Date:
05 May 2016 18:00:00
Publisher:
CDS VizieR service
Description:
This service provides SIA access for VizieR associated data in FITS format.
453. VizieR SSA service
ID:
ivo://CDS.VizieR/ssap
Title:
VizieR SSA service
Short Name:
VizieR SSA
Date:
27 May 2016 18:00:00
Publisher:
CDS VizieR service
Description:
This service provides SSA access for VizieR associated data in FITS/VOTable format.
454. VLA-A Array AL218 Texas Survey Source Snapshots (AL218)
ID:
ivo://mast.stsci/siap/al218
Title:
VLA-A Array AL218 Texas Survey Source Snapshots (AL218)
Short Name:
VLA.AL218
Date:
23 Jul 2020 19:30:09
Publisher:
Space Telescope Science Institute Archive
Description:
The VLA-A Texas Survey consists of a sample of objects extracted from the earlier Texas Interferometer 365 MHz Survey of radio sources covering a strip of sky from approximately -35.5 degrees declination to +71.5 degrees declination, and complete to flux densities of 0.25 Jy, with positional accuracies of ~1 arcsecond in RA and DEC. The sample is a subset of 71 sources drawn from the area of one optical Schmidt sky survey plate (covering ~6.5x6.5 degrees), Region S861, centered at approximately RA=190.640822109, DEC=-0.273834224277 (J2000), from the UK Schmidt SRC-J Survey. The Region S861 was initially chosen because it represented the combination of the deepest UK Schmidt plate material (the best optical survey material available at the time of the sample definition in 1989) and the highest galactic latitude, thereby emphasizing the extragalactic nature of the survey and also maximizing the likelihood of having more optical detections. Much more recently, the area of this plate has been covered by a number of important sky surveys including 2MASS, NRAO VLA FIRST, and the Sloan Digital Sky Survey (SDSS) which is now public. In particular, the availability of the Sloan Survey data provides 5-band ugriz color information at optical wavelengths, to depth of g,r=22.2.
455. VLA Faint Images of the Radio Sky at Twenty Centimeters (FIRST)
ID:
ivo://mast.stsci/siap/vla-first
Title:
VLA Faint Images of the Radio Sky at Twenty Centimeters (FIRST)
Short Name:
VLA-FIRST
Date:
23 Jul 2020 19:41:49
Publisher:
Space Telescope Science Institute Archive
Description:
Faint Images of the Radio Sky at Twenty-cm (FIRST) is a systematic survey of the North and South Galactic caps begun in 1993, using the NRAO Very Large Array (VLA) . Typical images are comprised of 1150x1550 1.8" pixels with 5" resolution. Source catalogs are also available including peak and integrated flux densities generated from the high resolution coadded images. The survey yields very accurate (<1 arcsec rms) radio positions of faint (>1 mJy/beam) compact sources. The areas observed were chosen to coincide with the Sloan Digital Sky Survey.
456. VLA Low-frequency Sky Survey
ID:
ivo://nasa.heasarc/skyview/vlss
Title:
VLA Low-frequency Sky Survey
Short Name:
VLSS
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
The VLA Low-Frequency Sky Survey (VLSS) is a 74 MHz continuum survey covering the entire sky north of -30 degrees declination. Using the VLA in BnA and B-configurations, it will map the entire survey region at a resolution of 80" and with an average rms noise of 0.1 Jy/beam. <p> This version include the data from the VLSS redux which increased the coverage region slightly and substantially improved the data reduction. Details are in the Lane et al. (2012) reference. Provenance: <b>VLSS Team: </b>R.A. Perley, J.J. Condon, W.D. Cotton (NRAO); A.S. Cohen, W.M. Lane (NRC/NRL), N.E. Kassim, T.J.W. Lazio (NRL), W.C. Erickson (UMd). This is a service of NASA HEASARC.
457. VLA Survey of SDSS Stripe 82
ID:
ivo://nasa.heasarc/skyview/stripe82vla
Title:
VLA Survey of SDSS Stripe 82
Short Name:
Stripe82VLA
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
This survey is a deep, high resolution radio survey of a relatively small region that has particularly deep coverage in the Sloan Digital Sky Survey. As described in the reference abstract: This is a high-resolution radio survey of the Sloan Digital Sky Survey (SDSS) Southern Equatorial Stripe, a.k.a., Stripe 82. This 1.4 GHz survey was conducted from 2007 to 2009 with the Very Large Array primarily in the A-configuration, with supplemental B-configuration data to increase sensitivity to extended structure. The survey has an angular resolution of 1.8" and achieves a median rms noise of 53 microJy/beam over 92 square degrees. This is the deepest 1.4 GHz survey to achieve this large of an area filling in the phase space between small&amp;deep and large&amp;shallow surveys. <p> The astrometric accuracy of the data is excellent with errors in observed sources of 0.10" in both RA and declination. A comparison with the SDSS DR7 Quasar Catalog confirms that the astrometry is well tied to the optical reference frame with mean offsets of 0.02+/-0.01" in RA and 0.01+/-0.02 in declination. Provenance: TBD. This is a service of NASA HEASARC.
458. VLT ISAAC Ks Observations of the Southern Hubble Ultradeep Field
ID:
ivo://nasa.heasarc/skyview/hudfisaac
Title:
VLT ISAAC Ks Observations of the Southern Hubble Ultradeep Field
Short Name:
HUDFISAAC
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
A very deep Ks observation of the Hubble Ultradeep Field. This observation is approximately 0.6 magnitudes deeper than the GOODS ISAAC Ks image but covers only small fraction of the area. Provenance: Data downloaded from VLT archive. This is a service of NASA HEASARC.
459. Westerbork Northern Sky Survey
ID:
ivo://nasa.heasarc/skyview/wenss
Title:
Westerbork Northern Sky Survey
Short Name:
WENSS
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Westerbork Northern Sky Survey (<i>WENSS</i>) is a low-frequency radio survey that covers the whole sky north of delta=30 degree at a wavelength of 92 cm to a limiting flux density of approximately 18 mJy (5 sigma). This survey has a resolution of 54" x 54" cosec (delta) and a positional accuracy for strong sources of 1.5''. <p> Further information on the survey including links to catalogs derived from the survey is available at the <a href="https://web.archive.org/web/20041204180313/http://www.strw.leidenuniv.nl/wenss/"><i>WENSS</i> website</a>. <p> The <i>WENSS</i> survey is included on the <b>SkyView High Resolution Radio Coverage </b><a href="https://skyview.gsfc.nasa.gov/images/high_res_radio.jpg"> map</a>. This map shows coverage on an Aitoff projection of the sky in equatorial coordinates. <p> Provenance: <i>WENSS</i> Team. Data downloaded from <a href=ftp://vliet.strw.leidenuniv.nl/pub/wenss/HIGHRES/> <i>WENSS</i> FTP site</a> 1999-03-18. The <i>WENSS</i> project is a collaboration between the <a href="https://www.astron.nl/astronomy/">Netherlands Foundation for Research in Astronomy</a> (NFRA/ASTRON) and the <a href="https://local.strw.leidenuniv.nl/">Leiden Observatory</a>.. This is a service of NASA HEASARC.
460. Wide Field Planetary Camera 2
ID:
ivo://archive.stsci.edu/hst/wfpc2
Title:
Wide Field Planetary Camera 2
Short Name:
HST.WFPC2
Date:
23 Jul 2020 19:52:01
Publisher:
Space Telescope Science Institute Archive
Description:
The WFPC2 is used to obtain high resolution images of astronomical objects over a relatively wide field of view and a broad range of wavelengths (1150 to 11,000 Å).

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