2001A&A...365L.116R


Query : 2001A&A...365L.116R

2001A&A...365L.116R - Astronomy and Astrophysics, volume 365, L116-121 (2001/1-1)

The first XMM-Newton spectrum of a high redshift quasar - PKS 0537-286.

REEVES J.N., TURNER M.J.L., BENNIE P.J., POUNDS K.A., SHORT A., O'BRIEN P.T., BOLLER T., KUSTER M. and TIENGO A.

Abstract (from CDS):

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 high-z quasar to date. The EPIC observations show that PKS 0537-286 is extremely X-ray luminous (LX=2x1047erg/s), with an unusually hard X-ray spectrum (Γ=1.27±0.02). The flat power-law emission extends over the whole observed energy range (0.4 to 40keV 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 redshifted iron K line, observed at 1.5keV - corresponding to ∼6.15keV 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 (33eV), consistent with the ``X-ray Baldwin effect" observed in other luminous quasars. The reflected continuum is also weak (R≲0.25). We find the overall spectral energy distribution of PKS 0537-286 is dominated by the X-ray emission, which, together with the flat power-law and weak reflection features, suggests that the X-radiation from PKS 0537-286 is dominated by inverse Compton emission associated with a face-on relativistic jet.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: individual: PKS 0537-286 - X-rays: galaxies

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B0537-286 QSO 05 39 54.2815136376 -28 39 55.947762216   19.70 20.0 18.789   ~ 262 1
2 NGC 3227 GiP 10 23 30.5765149296 +19 51 54.282206700   12.61 11.79     ~ 1620 1
3 ESO 383-35 Sy1 13 35 53.7691256160 -34 17 44.160716796   13.89 13.61 8.9   ~ 1429 0

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2022.08.18-04:37:33

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