A compiled catalogue of optical positions of extragalactic radio sources
نویسندگان
چکیده
منابع مشابه
Determination of optical positions for 23 extragalactic radio sources
AB S TRACT The optical counterparts of 23 extragalactic radio sources, of which 13 are in the southern hemisphere, have been observed by three telescopes equipped with CCDs. By reference to the Astrographic/Tycho (ACT) Reference, Carlsberg Meridian (CMC), Positions and Proper Motions (PPM), Hipparcos (HIP) and Lick Northern Proper Motion (NPM) catalogues, the positions of the 23 objects have be...
متن کاملYoung Extragalactic Radio Sources
Gigahertz Peaked Spectrum (GPS) sources and Compact Symmetric Objects (CSO) are selected in very different ways, but have a significant overlap in properties. Ever since their discovery it has been speculated that they are young objects, but only recently, strong evidence has been provided indicating that GPS sources and CSOs are indeed the young counterparts of large, extended sources. They ar...
متن کاملAn all - sky optical catalogue of radio / X - ray sources ,
We present an all-sky catalogue that aligns and overlays the ROSAT HRI, RASS, PSPC and WGA X-ray catalogues and the NVSS, FIRST and SUMSS radio catalogues onto the optical APM and USNO-A catalogues. Objects presented are those APM/USNO-A optical objects which are calculated with ≥40% confidence to be associated with radio/X-ray detections, or which are identified as known QSOs, AGN or BL Lacs, ...
متن کاملAn all-sky optical catalogue of radio / X-ray sources
We present an all-sky catalogue that aligns and overlays the ROSAT HRI, RASS, PSPC and WGA X-ray catalogues and the NVSS, FIRST and SUMSS radio catalogues onto the optical APM and USNO-A catalogues. Objects presented are those APM/USNO-A optical objects which are calculated with ≥ 40% confidence to be associated with radio/X-ray detections, or which are identified as known QSOs, AGN or BL Lacs,...
متن کاملLong-term variability of extragalactic radio sources in the Planck Early Release Compact Source Catalogue
1 Infrared Processing and Analysis Centre, California Institute of Technology, Pasadena, CA 91125, USA e-mail: [email protected] 2 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85741 Garching, Germany 3 Instituto de Física de Cantabria (CSIC-Universidad de Cantabria), Avda. de los Castros s/n, Santander, Spain 4 Jodrell Bank Centre for Astrophysics, Alan Turing Building, ...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1996
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1996288