A long BeppoSAX observation of the Blazar MKN 421

Details A long BeppoSAX observation of the Blazar MKN 421 A long BeppoSAX observation of the Blazar MKN 421

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.0304f&link_type=abstract

American Astronomical Society, HEAD meeting #4, #03.04; Bulletin of the American Astronomical Society, Vol. 31, p.699

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on a long BeppoSAX observation of the BL Lac MRK421 performed from the 29th of April to the 5th of May 1997. The source displays variability on a timescale of ~ 1 day. The spectrum apperars to harden as the source becomes brighter. The time average spectrum is well fitted by a broken power-law with a break energy of 1 keV. Intensity resolved spectral analysis shows that the break-energy, does not change. In the low intensisty state, at high energies (> 10 keV), the source shows evidence of a spectral hardening, most likely due to an inverse-Compton component.

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