XMM-Newton observations of absorption features towards PKS 2155-304

Details XMM-Newton observations of absorption features towards PKS 2155-304 XMM-Newton observations of absorption features towards PKS 2155-304

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003newar..47..561c&link_type=abstract

New Astronomy Reviews, Volume 47, Issue 6-7, p. 561-563.

Astronomy and Astrophysics

Astronomy

2

Bl Lacertae Objects: Individual (Pks 2155-304), Intergalactic Medium, Large-Scale Structure Of Universe, Quasars: Absorption Lines

Scientific paper

We present XMM-Newton grating spectra of the bright BL Lac object PKS 2155-304 taken in November 2000. Various absorption features are detected in the range 5-38 Å. The results are compared with those recently obtained with Chandra gratings [ApJ 573 (2002) 157; Nature, 421 (2003) 719]. We discuss whether the absorption occurs at the source (in the host galaxy or in a jet), in the Galactic halo, or in the intervening cluster. We are not able to confirm the proposal by [ApJL 572 (2002) L127] that a hot medium is responsible for an absorption feature at an intermediate redshift.

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