1 - 4 of 4
Number of results to display per page
Search Results
- ID:
- ivo://jvo/isas/darts/halca/halca_vsop_survey_program_data
- Title:
- The VSOP (the VLBI Space Observatory Programme) 5 GHz AGN (Active Galactic Nuclei) Survey Program Analysis Data
- Short Name:
- HALCA_AGN
- Date:
- 27 Mar 2025 01:27:35
- Publisher:
- JVO
- Description:
- A significant fraction of the mission time of VSOP was to be dedicated to the VSOP Survey Programme of bright compact Active Galactic Nuclei (AGN) at 5 GHz, which was lead by ISAS. The VSOP Survey Sources are an unbiased dataset of 294 targets, of which 82% were successfully observed.
- 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.
- 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.
