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Pregled bibliografske jedinice broj: 481900

Časopis

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Terzić, Tomislav; ... Semikoz, D.V.
Naslov: Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes
Izvornik: The Astrophysical journal (0004-637X) 723 (2010); L207-L212
Vrsta rada: članak
Ključne riječi: gamma rays: galaxies — galaxies: active — galaxies: individual (IC 310)
Sažetak:
We report on the detection with the MAGIC telescopes of very high energy gamma-rays from IC 310, a head-tail radio galaxy in the Perseus galaxy cluster, observed during the interval November 2008 to February 2010. The Fermi satellite has also detected this galaxy. The source is detected by MAGIC at a high statistical significance of 7.6sigma in 20.6 hr of stereo data. The observed spectral energy distribution is flat with a differential spectral index of -2.00 \pm 0.14. The mean flux above 300 GeV, between October 2009 and February 2010, (3.1 \pm 0.5)x10^{; ; ; ; ; ; ; ; -12}; ; ; ; ; ; ; ; cm^{; ; ; ; ; ; ; ; -2}; ; ; ; ; ; ; ; s^{; ; ; ; ; ; ; ; -1}; ; ; ; ; ; ; ; , corresponds to (2.5 \pm 0.4)% of Crab Nebula units. Only an upper limit, of 1.9% of Crab Nebula units above 300 GeV, was obtained with the 2008 data. This, together with strong hints (>3sigma) of flares in the middle of October and November 2009, implies that the emission is variable. The MAGIC results favour a scenario with the very high energy emission originating from the inner jet close to the central engine. More complicated models than a simple one-zone SSC scenario, e.g. multi-zone SSC, external Compton or hadronic, may be required to explain the very flat spectrum and its extension over more than three orders of magnitude in energy.
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: 481900.ms_ic310.pdf
URL Internet adrese: http://fulir.irb.hr/1385/
http://iopscience.iop.org/2041-8205/723/2/L207/
http://xxx.lanl.gov/abs/1009.2155v1
Broj citata:
Altmetric:
DOI: 10.1088/2041-8205/723/2/L207
URL cjelovitog teksta: http://fulir.irb.hr/1385/
Google Scholar: Detection of very high energy gamma-ray emission from the Perseus cluster head-tail galaxy IC 310 by the MAGIC telescopes
Upisao u CROSBI: dhrupec@irb.hr (dhrupec@irb.hr), 16. Ruj. 2010. u 16:08 sati



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