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oaioai:air.uniud.it:11390/878853

Discovery of very high energy gamma-rays from Markarian 180 triggered by an optical outburst

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Publication date
1 January 2006
Publisher
University of Chicago Press:PO Box 37005, Journals Division:Chicago, IL 60637:(877)705-1878, (877)705-1878, (773)753-2247, EMAIL: [email protected], INTERNET: http://www.press.uchicago.edu, Fax: (877)705-1879, (773)753-0811
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    Abstract

    The high-frequency-peaked BL Lacertae object Markarian 180 (Mrk 180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr, and very high energy gamma-ray emission was detected with a significance of 5.5 sigma. An integral flux above 200 GeV of (2.3 +/- 0.7) x 10(-11) cm(-2) s(-1) was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of has been determined. No significant flux -3.3 x 0.7 variation was found

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    Archivio istituzionale della ricerca - Università degli Studi di Udine

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    Last time updated on 12/11/2016

    This paper was published in Archivio istituzionale della ricerca - Università degli Studi di Udine.

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