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XMM-Newton observations of Markarian 421

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posted on 2012-10-24, 09:22 authored by W. Brinkmann, M. Gliozzi, T. Boller, S. Sembay, R. G. Griffiths, G. Branduardi-Raymont, S. Zane, A. Tiengo, S. Molendi
The BL Lac object Mrk 421 was observed on May 25, 2000 during the XMM-Newton Cal/PV phase. The high throughput of the X-ray telescopes and the spectral capabilities of the instruments allow an uninterrupted temporal and spectral study of the source with unprecedented time resolution. Mrk 421 was found at a relatively high state with a 2-6 keV flux of (1.3-1.9) 10-10 erg cm-2 s-1. The observed intensity variations by more than a factor of three at highest X-ray energies are accompanied by complex spectral variations with only a small time lag ( $\tau = 265^{+116}_{-102}$ s) between the hard and soft photons. The (0.2-10) keV spectrum can be well fitted by a broken power law and no absorption structures are found in the source spectrum at the high spectral resolution of the transmission gratings.

History

Citation

Astronomy & Astrophysics, 2001, 365 (1)

Version

  • VoR (Version of Record)

Published in

Astronomy & Astrophysics

Publisher

EDP Sciences for European Southern Observatory (ESO)

issn

0004-6361

Copyright date

2001

Available date

2012-10-24

Publisher version

http://www.aanda.org/articles/aa/abs/2001/01/aaxmm24/aaxmm24.html

Language

en

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