TeV and Correlated Multiwavelength Observations of Markarian 501

Details TeV and Correlated Multiwavelength Observations of Markarian 501 TeV and Correlated Multiwavelength Observations of Markarian 501

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.390b&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

We present observations of the BL Lac object Mrk 501 made at E > 300 GeV with the Whipple gamma-ray telescope as well as contemporaneous observations made in the optical, UV, and X-ray wavebands. Data taken in 1997 show strong evidence for correlated variability of the gamma-ray, ~100 keV (OSSE), and keV (RXTE) emission. Short variability timescales and temporal correlations require moderate Doppler boosting and a compact emission region in a relativistic jet. These data are most naturally explained by synchrotron inverse-Compton models with the synchrotron spectrum extending to energies of of at least 100 keV. Multiwavelength observations from May 1998 show dramatically lower emission in all wavebands and together with the 1997 data indicate that a single nonthermal electron population is responsible for the bulk of the X-ray and gamma-ray emission.

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