- ID:
- ivo://nasa.heasarc/rassgb
- Title:
- RASS/Green Bank Catalog
- Short Name:
- RASS/GBC
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- 5-GHz high-resolution VLA observations of 2,127 radio and X-ray emitting sources found in both the Green Bank (GB) 5-GHz radio catalog and the ROSAT All-Sky Survey (RASS) are presented. This is referred to as the RASS/Green Bank sample: the HEASARC has abbreviated this to RASSGB to conform with the naming convention that we have used for other RASS catalogs (notice the catalog authors use the rather shorter acronym of RGB. Core flux densities and positions accurate to +/- 0.5" are reported, as well as the GB measurements of the total radio emission, for each source. Because of the radio and X-ray selection criteria adopted, this catalog is believed to almost exclusively contain radio- and X-ray-loud active galaxies. These data are used in the paper by Laurent-Muehleisen et al. (1997) that contains the published version of this catalog to derive the core-to-lobe ratio of objects in this sample, and to discuss their core-dominance relative to samples of radio galaxies and BL Lac objects: the authors conclude that this sample is approximately an order of magnitude more core-dominated than the radio galaxy sample, but is more than an order of magnitude less core-dominated than highly-beamed BL Lac objects. The published version of this catalog comprised two main tables, Table 2 and Table 3. Table 2 gave the 5-GHz high resolution radio source properties for the 1861 ROSAT/Green Bank sources for which subarcsecond positions and core radio flux densities had been obtained, while Table 3 gave the 5-GHz radio source properties for the 436 ROSAT/Green Bank sources for which only low resolution data were obtained. A table of the 83 ROSAT/Green Bank sources for which no radio source greater than 5 sigma was observed in the follow-up VLA observations (Table 4 in the paper) is not included in the present HEASARC RASSGB Catalog but is available in data archive at <pre> <a href="https://heasarc.gsfc.nasa.gov/FTP/heasarc/dbase/misc_files/rassgb/">https://heasarc.gsfc.nasa.gov/FTP/heasarc/dbase/misc_files/rassgb/</a> </pre> This HEASARC version of the ROSAT/Green Bank Catalog was created in November 1998 based on the ADC/<a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+AS/122/235">CDS Catalog <J/A+AS/122/235></a> (Tables 2 and 3). This is a service provided by NASA HEASARC .
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- ID:
- ivo://nasa.heasarc/rbscnvss
- Title:
- ROSAT All-Sky Survey/NVSS Bright X-Ray Source Sample
- Short Name:
- RASS/NVSS
- Date:
- 07 Mar 2025
- Publisher:
- NASA/GSFC HEASARC
- Description:
- By cross-identifying the RASS (ROSAT All-Sky Survey) Bright Source Catalog (RBSC, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/IX/10">CDS Catalog IX/10</a>) with the NRAO VLA Sky Survey (NVSS, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/VIII/65">CDS Catalog VIII/65</a>), the authors have constructed the RBSC-NVSS sample of the brightest X-ray sources (>= 0.1 counts/s ~ 10<sup>-12</sup> erg/cm<sup>2</sup>/s in the 0.1 - 2.4keV band) that are also radio sources (S >= 2.5 mJy at 1.4 GHz) in the 7.8 sr solid angle of extragalactic sky with galactic latitude |b| > 15 degrees and declination > -40 degrees. The sky density of NVSS sources is low enough that they can be reliably identified with RBSC sources having rms positional uncertainties >= 10". The authors used the more accurate radio positions to make reliable X-ray/radio/optical identifications down to the POSS plate limits. They obtained optical spectra for many of the bright identifications lacking published redshifts. The resulting X-ray/radio sample is unique in its size (1557 objects), composition (a mixture of nearly normal galaxies, Seyfert galaxies, quasars, and clusters), and low average redshift [<z>~0.1]. This table was created by the HEASARC in September 2003 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/ApJS/129/547">CDS Catalog J/ApJS/129/547</a>, files table1.dat and table2.dat. This is a service provided by NASA HEASARC .
