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Titolo:
The first XMM-Newton spectrum of a high redshift quasar - PKS 0537-286
Autore:
Reeves, JN; Turner, MJL; Bennie, PJ; Pounds, KA; Short, A; OBrien, PT; Boller, T; Kuster, M; Tiengo, A;
Indirizzi:
Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England Univ Leicester Leicester Leics England LE1 7RH er LE1 7RH, Leics, England Max Planck Inst Extraterr Phys, D-85748 Garching, Germany Max Planck Inst Extraterr Phys Garching Germany D-85748 arching, Germany Univ Tubingen, Inst Astron & Astrophys AStron, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 AStron, D-72076 Tubingen, Germany IFC Milan, I-20133 Milan, Italy IFC Milan Milan Italy I-20133IFC Milan, I-20133 Milan, Italy
Titolo Testata:
ASTRONOMY AND ASTROPHYSICS
fascicolo: 1, volume: 365, anno: 2001,
pagine: L116 - L121
SICI:
0004-6361(200101)365:1<L116:TFXSOA>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTIVE GALACTIC NUCLEI; X-RAY-SPECTRA; ASCA; EVOLUTION; EMISSION; ABSORPTION; MODELS; QSO;
Keywords:
galaxies : active; quasars : individual : PKS 0537-286; X-rays : galaxies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Reeves, JN Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England Univ Leicester Leicester Leics England LE1 7RH Leics, England
Citazione:
J.N. Reeves et al., "The first XMM-Newton spectrum of a high redshift quasar - PKS 0537-286", ASTRON ASTR, 365(1), 2001, pp. L116-L121

Abstract

We present XMM-Newton observations of the high redshift (z = 3.104), radio-loud quasar PKS 0537-286. The EPIC CCD cameras provide the highest signal-to-noise spectrum of a higll-z quasar to date. The EPIC observations show that PKS 0537-286 is extremely X-ray luminous (L-X = 2 10(47) erg s(-1)), with an unusually hard X-ray spectrum (Gamma = 1.27 +/- 0.02). The flat power-lam emission extends ol cr the whole observed energy range (0.4 to 40 keV in the quasar rest frame); there is no evidence of intrinsic absorption, which has been claimed in PKS 0537-286 and other high z quasars. However, there is evidence for weak Compton reflection. A red-shifted iron K line, observed at 1.5 keV - corresponding to similar to6.15 keV in the quasar rest frame is detected at 95% confidence. If confirmed, this is the most distant iron K line known. The line equivalent width is small (33 eV), consistent with the IX-ray Baldwin effect'' observed in other luminous quasars. The reflected continuum X-ray emission, which: together with the flat power-law andweak reflection features, suggests that the X-radiation from PKS 0537-286 is dominated by inverse Compton emission associated with a face-on relativistic jet.

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Documento generato il 10/08/20 alle ore 14:18:24