The giant X-ray flares of Mrk 421 in spring-summer 2006

Journal Article · Thu Jul 12 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2757356· OSTI ID:21067250

Tramacere, Andrea; Maselli, Alessandro ^[1]; Giommi, Paolo; Perri, Matteo ^[2]; Massaro, Francesco ^[3]

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1. Department of Physics, University of Rome 'La Sapienza', Rome (Italy)
2. ASI Science Data Center (ASDC), Rome (Italy)
3. Dipartimento di Fisica, Universita di Roma Tor Vergata, Via della Ricerca scientifica 1, I-00133 Roma (Italy)

In spring/summer 2006 the BL Lac object Mrk 421 reached its largest ever recorded flux in the X-rays, up to about one tenth of Crab in the 2.0-10.0 keV band, and showed a synchrotron SED peak at approximately 10 keV. We present results of a spectral analysis of three observations performed by the UVOT, the XRT and the BAT telescopes on board the SWIFT satellite. According to the widely accepted SSC scenario, the expected flux in the GLAST LAT instrument, for such a bright X-ray state, should result in a counting statistics sufficient for a determination of the gamma-ray spectral shape.

• OSTI ID: 21067250
• Journal Information: AIP Conference Proceedings, Vol. 921, Issue 1; Conference: 1. GLAST symposium, Stanford, CA (United States), 5-8 Feb 2007; Other Information: DOI: 10.1063/1.2757356; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COSMIC PHOTONS
COSMIC X-RAY SOURCES
GAMMA RADIATION
GAMMA SPECTRA
KEV RANGE
STATISTICS
SYNCHROTRON RADIATION
TELESCOPE COUNTERS
X RADIATION
X-RAY DETECTION
X-RAY SPECTRA