TITLE

CAT VHE γ-ray observations of Mkn 501 and Mkn 421, and implications on the blazar phenomenon

AUTHOR(S)
Djannati-Ataı¨ for the CAT collaboration, Arache
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p328
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Two blazars, Mrk421 and Mrk501, have been detected at TeV energies by the CAT telescope operating in the French Pyrene´es. The Very High Energy (VHE) emission observed from Mrk501 exhibits dramatically different behavior in the quiescent and flaring states: the steep power-law spectrum seen in the low-activity state of 1998 contrasting with the harder, curved spectrum in the high-activity state of 1997. Mrk421 observations, on the other hand, are consistent with a power-law spectrum from the low-to-midrange intensities seen in 1998. The VHE spectra, considered along with the low-energy (X-ray) behavior of these sources, shed light on gamma-ray production and absorption mechanisms within blazar jets. © 2000 American Institute of Physics.
ACCESSION #
6029781

 

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