Dictionary of Nomenclature of Celestial Objects
(Last update: 22-Mar-2024)

Result of query: info cati QORG$

Details on Acronym:   QORG
  
QORG (Quasars Org.)
Write:<<QORG JHHMMSS.s+DDMMSS>>
N: 501761
Object:Poss. QSO  (SIMBAD class: QSO_Candidate = Quasar Candidate)
Note:The QUASARS.ORG Catalogues align and overlay the year 2001-2 releases of the ROSAT HRI, RASS, PSPC and WGA X-ray catalogues, the NVSS, FIRST and SUMSS radio catalogues, the Veron QSO catalogue, the Principal Galaxy Catalogue, and the SDSS-EDR (2001) onto the optical APM and USNO catalogues.
Notes:In addition these catalogues display calculated percentage probabilities for each optical radio-Xray-associated object of its likelihood of being a quasar, galaxy, star, or erroneous radio-Xray association.
The source optical catalogues used are the APM general catalogue of 959 POSS-I and UKST plates, and the USNO A1.0 and USNO A2.0 catalogues, combined into a 670,000,000 merged catalogue photometrically recalibrated plate by plate.
Up to six radio-Xray catalog identifications are presented for each optical object, plus double radio lobes where identified.
The main Master catalogue displays all 425932 radio-Xray associated optical objects, plus optically-found catalogued QSO-AGN-BLLac objects with confidence about 40per100 of being a radio-X-ray emitting optical object.
The Free-Lunch catalogue is a concise easy-to-read variant of the Master catalogue showcasing just one Xray and/or radio identification for each object.
There is also a subset catalogue of QSO candidates, and a subset catalogue of known QSOs-galaxies-stars.
Ref:=2004A&A...427..387F
byFLESCH E. , HARDCASTLE M.J.
 Astron. Astrophys., 427, 387-392 (2004)
  An all-sky optical catalogue of radio/X-ray sources.
oCatalog QORG JHHMMSS.s+DDMMSS: the catalog in VizieR has this format.
oCatalog: <QORG JHHMMSS.ss+DDMMSS> N=501761.
=E=Catalogue in electronic form as J/A+A/427/387
Originof the Acronym: p = Pre-registered to IAU Comm.5