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Pregled bibliografske jedinice broj: 582281

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Šnidarić, Iva; ...; Terzić, Tomislav; ...; Zanin, R.
Naslov: Detection of VHE gamma-rays from HESS J0632+057 during the 2011 February X-ray outburst with the MAGIC telescopes
Izvornik: The Astrophysical journal (0004-637X) 754 (2012), 1; L10-1-L10-5
Vrsta rada: članak
Ključne riječi: binaries: general; gamma rays: general; stars: individual (MWC 148); X-rays: binaries; X-rays: individual (HESS J0632+057)
Sažetak:
The very high energy (VHE) gamma-ray source HESS J0632+057 has recently been confirmed to be a gamma-ray binary. The optical counterpart is the Be star MWC 148, and a compact object of unknown nature orbits it every ~321 days with a high eccentricity of ~0.8. We monitored HESS J0632+057 with the stereoscopic MAGIC telescopes from 2010 October to 2011 March and detected significant VHE gamma-ray emission during 2011 February, when the system exhibited an X-ray outburst. We find no gamma-ray signal in the other observation periods when the system did not show increased X-ray flux. Thus, HESS J0632+057 exhibits gamma-ray variability on timescales of the order of one to two months possibly linked to the X-ray outburst that takes place about 100 days after the periastron passage. Furthermore, our measurements provide for the first time the gamma-ray spectrum down to about 140 GeV and indicate no turnover of the spectrum at low energies. We compare the properties of HESS J0632+057 with the similar gamma-ray binary LS I +61 303 and discuss the possible origin of the multi-wavelength emission of the source.
Projekt / tema: HRZZ-02.01/12, HRZZ-09/176
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 582281.HESSJ0632057.pdf
URL Internet adrese: http://fulir.irb.hr/1648/
http://arxiv.org/abs/1203.2867v1
http://iopscience.iop.org/2041-8205/754/1/L10/
Broj citata:
Altmetric:
DOI: 10.1088/2041-8205/754/1/L10
URL cjelovitog teksta: http://fulir.irb.hr/1648/
Google Scholar: Detection of VHE gamma-rays from HESS J0632+057 during the 2011 February X-ray outburst with the MAGIC telescopes
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 30. Svi. 2012. u 22:22 sati



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