Abstract
view Abstract Citations (16) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS GB 1508+5714, The First z>4 Radio-Selected Quasar in X-Rays Mathur, Smita ; Elvis, Martin Abstract We report the detection in x ray of a high redshift (z = 4.30) radio-loud quasar, GB 1508+5714, the first radio-selected z > 4 quasar seen in x- rays. The quasar was observed serendipitously with the Einstein observatory IPC at 0.02 +/- 0.003 counts s^-1^. It is ten times brighter than the other two z > 4 x-ray detected quasars. The x-ray source is unusually hard, implying either α_E_ < -0.2, or N_H_> 10^22^ atoms cm^-2^ (1σ limits) for a simple power-law plus intrinsic (z = 4.3) absorption. Intrinsic absorption would make GB 1508+5714 similar to a large fraction of z ~ 3 radio-loud quasars. Publication: The Astronomical Journal Pub Date: October 1995 DOI: 10.1086/117627 Bibcode: 1995AJ....110.1551M Keywords: QUASARS: INDIVIDUAL: GB 1508; X-RAYS: GALAXIES; EARLY UNIVERSE full text sources ADS | data products SIMBAD (5) NED (1)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
