SIMBAD references

2004ApJ...603..449C - Astrophys. J., 603, 449-455 (2004/March-2)

A view of PKS 2155-304 with XMM-newton reflection grating spectrometers.

CAGNONI I., NICASTRO F., MARASCHI L., TREVES A. and TAVECCHIO F.

Abstract (from CDS):

We present the high-resolution X-ray spectrum of the BL Lac object PKS 2155-304 taken with the RGS units on board XMM-Newton in 2000 November. We detect an O VII Kα resonant absorption line from warm/hot local gas at 21.59 Å (∼4.5 σ detection). The line profile is possibly double peaked. We do not confirm the strong 20.02 Å absorption line seen with Chandra and interpreted as z∼0.05 O VIII Kα. We set a 3 σ upper limit of 14 mÅ on the equivalent width. We also detect the ∼23.5 Å interstellar O I 1s⟶2p line and derive a factor of ≤1.5 subsolar O/H ratio in the interstellar medium along the PKS 2155-304 line of sight.

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Journal keyword(s): Galaxies: BL Lacertae Objects: Individual: Alphanumeric: PKS 2155-304 - Galaxies: Intergalactic Medium - Cosmology: Large-Scale Structure of Universe - Galaxies: Quasars: Absorption Lines - X-Rays: Galaxies

Simbad objects: 9

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