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    Detection of Gamma Rays with E > 300 GeV from Markarian 501

    Quinn, J. and Akerlof, C.W. and Biller, S.D. and Buckley, J.H. and Carter-Lewis, D.A. and Cawley, Michael F. and Catanese, M. and Connaughton, V. and Fegan, D.J. and Finley, J.P. and Gaidos, J.A. and Hillas, A.M. and Lamb, R.C. and Krennrich, F. and Lessard, R.W. and McEnery, J.E. and Meyer, D.I. and Mohanty, G. and Rodgers, A.J. and Rose, H.J. and Schubnell, M.S. and Sembroski, G.H. and Weekes, T.C. and Wilson, C.W. and Zweerink, J. (1996) Detection of Gamma Rays with E > 300 GeV from Markarian 501. Astrophysical Journal, 456 (L83). ISSN 0004-637X

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    The detection of gamma rays of energy greater than 300 GeV from the BL Lacertae object Mrk 501 demonstrates that extragalactic TeV emission is not unique to Mrk 421. During 66 hr of observations between 1995 March and July we measured an average flux of 8.1 ± 1.4 × 10-12 cm-2 s-1 above 300 GeV, a flux that is only 20% of the average Mrk 421 flux. The new gamma-ray source has not been reported by the Compton Gamma Ray Observatory as an emitter of gamma rays at lower energies. There is evidence for variability on timescales of days.

    Item Type: Article
    Additional Information: Citation: J. Quinn et al 1996 ApJ 456 L83
    Keywords: BL Lacertae objects: individual; Markarian 501; gamma rays: observations;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 9950
    Identification Number:
    Depositing User: Dr. Michael Cawley
    Date Deposited: 18 Sep 2018 16:04
    Journal or Publication Title: Astrophysical Journal
    Publisher: American Astronomical Society
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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