Discovery of Spectral Variability of Markarian 421 at TeV Energies

• Published in: arXiv.org
• Main Authors: Krennrich, F, Bond, I H, Bradbury, S M, Buckley, J H, Carter-Lewis, D A, Cui, W, I de la Calle Perez, Fegan, D J, Fegan, S J, Finley, J P, Gaidos, J A, Gibbs, K, Gillanders, G H, Hall, T A, Hillas, A M, Holder, J, Horan, D, Jordan, M, Kertzman, M, Kieda, D, Kildea, J, Knapp, J, Kosack, K, Lang, M J, LeBohec, S, Moriarty, P, Müller, D, Ong, R A, Pallassini, R, Petry, D, Quinn, J, Reay, N W, Reynolds, P T, Rose, H J, Sembroski, G H, Sidwell, R, Stanton, N, Swordy, S P, Vassiliev, V V, Wakely, S P, Weekes, T C
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 08.07.2002
• Subjects: Blazars; Correlation; Crab nebula; Energy spectra; Flux; Gamma ray telescopes; Gamma rays

The detection of spectral variability of the gamma-ray blazar Mrk 421 at TeV energies is reported. Observations with the Whipple Observatory 10m gamma-ray telescope taken in 2000/2001 revealed exceptionally strong and long-lasting flaring activity. Flaring levels of 0.4 to 13 times that of the Crab...