Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/112965
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Type: Journal article
Title: MAGIC observations of MWC 656, the only known Be/BH system
Author: Aleksić, J.
Ansoldi, S.
Antonelli, L.
Antoranz, P.
Babic, A.
Bangale, P.
Barrio, J.
Becerra González, J.
Bednarek, W.
Bernardini, E.
Biasuzzi, B.
Biland, A.
Blanch, O.
Bonnefoy, S.
Bonnoli, G.
Borracci, F.
Bretz, T.
Carmona, E.
Carosi, A.
Colin, P.
et al.
Citation: Astronomy and Astrophysics, 2015; 576:A36-1-A36-5
Publisher: EDP Sciences Journals
Issue Date: 2015
ISSN: 0004-6361
1432-0746
Statement of
Responsibility: 
J. Aleksić, S. Ansoldi, L. A. Antonelli, P. Antoranz, A. Babic ... Sabrina Einecke ... et al.
Abstract: Context. MWC 656 has recently been established as the first observationally detected high-mass X-ray binary system containing a Be star and a black hole (BH). The system has been associated with a gamma-ray flaring event detected by the AGILE satellite in July 2010. Aims. Our aim is to evaluate whether the MWC 656 gamma-ray emission extends to very high energy (VHE > 100 GeV) gamma rays. Methods. We observed MWC 656 with the MAGIC telescopes for ~23 h during two observation periods: between May and June 2012, and in June 2013. During the last period, observations were performed contemporaneously with X-ray (XMM-Newton) and optical (STELLA) instruments. Results. We did not detect the MWC 656 binary system at TeV energies with the MAGIC telescopes in either of the two campaigns. Upper limits (ULs) to the integral flux above 300 GeV have been set, as well as differential ULs at a level of ~5% of the Crab nebula flux. The results obtained from the MAGIC observations do not support persistent emission of VHE gamma rays from this system at a level of 2.4% the Crab flux.
Keywords: Astroparticle physics / binaries: general / gamma rays: stars / X-rays: binaries / stars: individual: MWC 656
Rights: © ESO, 2015
RMID: 0030077910
DOI: 10.1051/0004-6361/201424879
Appears in Collections:Physics publications

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