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Pregled bibliografske jedinice broj: 487862

Ostalo

Autori: Aleksić, Jelena; ...; Dominis Prester, Dijana; ...; Ferenc, Daniel; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Terzić, Tomislav
Naslov: Discovery of Very High Energy Gamma-Ray Emission from NGC1275 by MAGIC
Izvornik: The Astronomer's Telegram, #2916
Vrsta: Otkriće
Godina: 2010
Ključne riječi: Gamma Ray; >GeV; TeV; VHE; AGN; Blazars; Cosmic Rays
Sažetak:
The MAGIC Collaboration reports the detection of Very High Energy (VHE) gamma-ray emission from a position consistent with NGC 1275, the central radio galaxy of the Perseus cluster of galaxies. The MAGIC observations were carried out in stereoscopic mode starting from August 2010, accumulating 14 h of good quality data. Preliminary analysis using the standard analysis chain with a energy threshold of 100 GeV, shows an excess of 280 gamma-rays, corresponding to a statistical significance of 5.2 standard deviations. The observed flux is estimated to be ~3% of the Crab nebula flux above 100 GeV, and it decreases rapidly with energy. No signal is detected above 400 GeV. The MAGIC VHE detection happened during a period of increased high gamma-ray activity of NGC 1275, as reported in July 2010 by the Fermi/LAT collaboration, ATel#2737, and continuing until October, according to an analysis of public Fermi/LAT data. MAGIC will continue observations of NGC1275. Observations at other wavelengths are encouraged.
Projekt / tema: 098-0982931-2875, HRZZ-02.01/12
Izvorni jezik: ENG
Znanstvena područja:
Fizika
URL Internet adrese: http://www.astronomerstelegram.org/?read=2916
Upisao u CROSBI: dijana@uniri.hr (dijana@uniri.hr), 24. Lis. 2010. u 21:35 sati



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