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Pregled bibliografske jedinice broj: 517840

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Terzić, Tomislav; ...; Zanin, R.
Naslov: Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma- rays with the MAGIC Telesopes in 2009
Izvornik: The Astrophysical journal (0004-637X) 746 (2012), 80; 1-6
Vrsta rada: članak
Ključne riječi: binaries: general; gamma rays: observations; stars: emission-line; stars: individual (LS I +61 303); X-rays: binaries; X-rays: individual (LS I +61 303)
Sažetak:
We present very high energy (VHE, E > 100 GeV) gamma-ray observations of the high mass X-ray binary system LS I +61 303 obtained with the MAGIC stereo system between 2009 October and 2010 January. We detect a 6.3 sigma gamma-ray signal above 400 GeV in the combined data set. The integral flux above an energy of 300 GeV is F (E > 300 GeV) = (1.4 +- 0.3 stat +- 0.4 syst) * 10^(−12) cm^(−2) s^(−1) , which corresponds to about 1.3% of the Crab Nebula flux in the same energy range. The orbit-averaged flux of LS I +61 303 in the orbital phase interval 0.6– 0.7, where there is a maximum of the TeV flux, is lower by almost an order of magnitude compared to our previous measurements between 2005 September and 2008 January. This provides evidence for a new low emission state in LS I +61 303. We find that the change in the emission state can not be explained by an increase of photon-photon absorption around the compact star.
Projekt / tema: 098-0982931-2875, HRZZ-02.01/12
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: 517840.LSI_61_303.pdf
URL Internet adrese: http://fulir.irb.hr/1458/
http://arxiv.org/abs/1111.6572
http://iopscience.iop.org/0004-637X/746/1/80/
Broj citata:
Altmetric:
DOI: 10.1088/0004-637X/746/1/80
URL cjelovitog teksta: http://fulir.irb.hr/1458/
Google Scholar: Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma- rays with the MAGIC Telesopes in 2009
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 30. Lip. 2011. u 14:42 sati



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