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Title: Variable VHE gamma-ray emission from Markarian 501

Abstract

The blazar Markarian 501 (Mrk 501) was observed at energies above 100 GeV with the MAGIC telescope from May through July 2005. The high sensitivity of the instrument enabled the determination of the flux and spectrum of the source on a night-by-night basis. Throughout our observational campaign, the flux from Mrk 501 was found to vary by an order of magnitude, and to be correlated with spectral changes. Intra-night flux variability with flux-doubling times down to 2 minutes was also observed. The strength of variability increased with the energy of the {gamma}-ray photons. The energy spectra were found to harden significantly with increasing flux, and a spectral peak clearly showed up during very active states. The position of the spectral peak seems to be correlated with the source luminosity.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
899210
Report Number(s):
SLAC-PUB-12334
astro-ph/0702008; TRN: US0701929
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ENERGY SPECTRA; LUMINOSITY; PHOTONS; SENSITIVITY; TELESCOPES; UNINTERRUPTIBLE POWER SUPPLIES; Astrophysics,ASTRO

Citation Formats

Albert, Jordi. Variable VHE gamma-ray emission from Markarian 501. United States: N. p., 2007. Web. doi:10.1086/521382.
Albert, Jordi. Variable VHE gamma-ray emission from Markarian 501. United States. doi:10.1086/521382.
Albert, Jordi. Tue . "Variable VHE gamma-ray emission from Markarian 501". United States. doi:10.1086/521382. https://www.osti.gov/servlets/purl/899210.
@article{osti_899210,
title = {Variable VHE gamma-ray emission from Markarian 501},
author = {Albert, Jordi},
abstractNote = {The blazar Markarian 501 (Mrk 501) was observed at energies above 100 GeV with the MAGIC telescope from May through July 2005. The high sensitivity of the instrument enabled the determination of the flux and spectrum of the source on a night-by-night basis. Throughout our observational campaign, the flux from Mrk 501 was found to vary by an order of magnitude, and to be correlated with spectral changes. Intra-night flux variability with flux-doubling times down to 2 minutes was also observed. The strength of variability increased with the energy of the {gamma}-ray photons. The energy spectra were found to harden significantly with increasing flux, and a spectral peak clearly showed up during very active states. The position of the spectral peak seems to be correlated with the source luminosity.},
doi = {10.1086/521382},
journal = {Astrophysical Journal},
number = ,
volume = ,
place = {United States},
year = {Tue Feb 06 00:00:00 EST 2007},
month = {Tue Feb 06 00:00:00 EST 2007}
}