2003A&A...402..465F


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET20:43:32

2003A&A...402..465F - Astronomy and Astrophysics, volume 402, 465-476 (2003/5-1)

XMM-Newton observations of four high-z quasars.

FERRERO E. and BRINKMANN W.

Abstract (from CDS):

We present the results of XMM-Newton observations of four high-z quasars, two radio-loud and two radio-quiet. One of the radio-loud objects, PKS 2126-158, clearly shows absorption in excess of the galactic value as claimed before from ASCA and ROSAT observations. For PKS 2149-306 the evidence for excess absorption is only marginal in contrast to previous results. The location of the absorber in PKS 2126-158 is compatible with the redshift of the source. Both, a warm and a cold absorber are allowed by the X-ray data. Both quasars have very flat photon spectra (Γ≲1.5) and the high photon statistics reveal small deviations from a simple power law form. For the two radio-quiet objects, Q 0000-263 and Q 1442+2931, we determine, for the first time, reliable spectral parameters. Both quasars have steeper power laws (Γ∼2) and show absorption consistent with the galactic value, similar to radio-quiet quasars at low redshifts. In the case of Q 0000-263 the presence of the damped Lyα system (N(HI)∼2.6x1021.cm–2 at z=3.39) cannot be examined further due to the limited photon statistics in all instruments.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: general - X-rays: galaxies

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 QSO J0003-2603 QSO 00 03 22.9530051057 -26 03 18.306624161   18 17.53     ~ 272 0
2 QSO B1442+2931 QSO 14 44 53.5400641525 +29 19 05.693436038   16.59 16.38     ~ 76 0
3 QSO B2126-15 QSO 21 29 12.17589777 -15 38 41.0413097   17.61 17.3 17.3   ~ 472 1
4 QSO B2149-306 QSO 21 51 55.52398143 -30 27 53.6979987   17.95 18.0 17.48   ~ 226 1

    Equat.    Gal    SGal    Ecl

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