Mrk 421, Mrk 501, and 1ES 1426+428 at 100 GeV with the CELESTE Cherenkov Telescope

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.

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

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Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

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

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Abstract

V originále

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.