Implications of Time and Energy Resolved X-ray and Gamma-ray Spectra of MKN 501

Details Implications of Time and Energy Resolved X-ray and Gamma-ray Spectra of MKN 501 Implications of Time and Energy Resolved X-ray and Gamma-ray Spectra of MKN 501

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.384b&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

Makarian 501 was monitored on a daily basis in X-rays by XTE for 5frac{1}{2}days and in Gamma-rays by HEGRA for 6 days in 1997, both overlapping periods coinciding with the decline of one flare and the rise of another one. During this period the spectral index of the X-rays was anticorrelated with flux, i.e. the spectrum was harder when the flux was lower. Analysis of the data with two component synchrotron models shows that this behaviour results from the superposition of one component which has a truncated spectrum, declining and then rising in flux and a second harder component which varies very little. The minimum in the first component coincides to within half a day to the minimum in the gamma-ray flux, suggesting that inverse Compton emission from this component is responsible for the Gamma-rays.

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