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Pregled bibliografske jedinice broj: 498443

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Terzić, Tomislav; ...
Naslov: MAGIC observations and multiwavelength properties of the quasar 3C279 in 2007 and 2009
Izvornik: Astronomy and astrophysics (0004-6361) 530 (2011); A4-1-A4-11
Vrsta rada: članak
Ključne riječi: gamma rays: galaxies; quasars: individual: 3C 279
Sažetak:
3C 279, the first quasar discovered to emit VHE gamma-rays by the MAGIC telescope in 2006, was reobserved by MAGIC in January 2007 during a major optical flare and from December 2008 to April 2009 following an alert from the Fermi space telescope on an exceptionally high gamma -ray state. The January 2007 observations resulted in a detection on January 16 with significance 5.2 sigma, corresponding to a F(> 150 GeV) (3.8 \pm 0.8) \cdot 10^-11 ph cm^-2 s^-1 while the overall data sample does not show significant signal. The December 2008 - April 2009 observations did not detect the source. We study the multiwavelength behavior of the source at the epochs of MAGIC observations, collecting quasi-simultaneous data at optical and X-ray frequencies and for 2009 also gamma-ray data from Fermi. We study the light curves and spectral energy distribution of the source. The spectral energy distributions of three observing epochs (including the February 2006, which has been previously published in Albert et al. 2008a) are modeled with one-zone inverse Compton models and the emission on January 16, 2007 also with two zone model and with a lepto- hadronic model. We find that the VHE gamma-ray emission detected in 2006 and 2007 challenges standard one-zone model, based on relativistic electrons in a jet scattering broad line region photons, while the other studied models fit the observed spectral energy distribution more satisfactorily.
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
Kategorija: Znanstveni
Znanstvena područja:
Fizika
Puni text rada: 498443.3C279v2
URL Internet adrese: http://fulir.irb.hr/1438/
http://lanl.arxiv.org/abs/1101.2522v2
http://www.aanda.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/aa/abs/2011/06/aa16497-11/aa16497-11.html
Broj citata:
Altmetric:
DOI: 10.1051/0004-6361/201116497
URL cjelovitog teksta: http://fulir.irb.hr/1438/
Google Scholar: MAGIC observations and multiwavelength properties of the quasar 3C279 in 2007 and 2009
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 16. Sij. 2011. u 20:08 sati



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