SMITH, David A., Elisabeth BRION and Filip MÜNZ. Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov Telescope. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2006, vol. 459, No 2, p. 453-464. ISSN 0004-6361.
Other formats:   BibTeX LaTeX RIS
Basic information
Original name Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov Telescope
Authors SMITH, David A., Elisabeth BRION and Filip MÜNZ.
Edition Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2006, 0004-6361.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Country of publisher France
Confidentiality degree is not subject to a state or trade secret
WWW Abstrakt + PDF
Impact factor Impact factor: 3.971
Organization unit Faculty of Science
UT WoS 000241822800014
Keywords in English cosmic rays;atmospheric cerenkov technique; active galaxies;
Tags International impact, Reviewed
Changed by Changed by: Mgr. Filip Münz, PhD., učo 108960. Changed: 24/3/2010 15:31.
Abstract
We have measured the gamma-ray fluxes of the blazars Mrk 421 and Mrk 501 in the energy range between 50 and 350 GeV (1.2 to 8.3 x 10^25 Hz). The detector, called CELESTE, used first 40, then 53 heliostats of the former solar facility "Themis" in the French Pyrenees to collect Cherenkov light generated in atmospheric particle cascades. The signal from Mrk 421 is often strong. We compare its flux with previously published multi-wavelength studies and infer that we are straddling the high energy peak of the spectral energy distribution. The signal from Mrk 501 in 2000 was weak (3.4 sigma). We obtain an upper limit on the flux from 1ES 1426+428 of less than half that of the Crab flux near 100 GeV. The data analysis and understanding of systematic biases have improved compared to previous work, increasing the detector's sensitivity.
PrintDisplayed: 27/5/2024 06:15