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Pregled bibliografske jedinice broj: 844164

Ostalo

Autori: Mirzoyan, Razmik; ...; Babić, Ana; ...; Dominis Prester, Dijana; ...; Godinović, Nikola; ...; Hrupec, Dario; ...; Lelas, Damir; ...; Puljak, Ivica; ...; Surić, Tihomir; ...; Šnidarić, Iva; ...; Terzić, Tomislav; ... (the MAGIC Collaboration)
Naslov: MAGIC detection of an increased activity from NGC 1275 at very-high-energy gamma rays
Izvornik: The Astronomer's Telegram, #9689
Vrsta: Otkriće
Godina: 2016
Ključne riječi: Gamma Ray; >GeV; TeV; VHE
Sažetak:
Using the MAGIC telescopes, we have observed an increase in the very-high-energy (VHE ; >100 GeV) gamma-ray flux from NGC 1275 (3C 84, 03:19:48.16, +41:30:42.10, J2000.0). The preliminary analysis of the MAGIC data taken on 2016 Oct 29 indicates a flux of (8.5 +/- 0.9) x 10^-11 ph/cm^2/s corresponding to 16% of the flux from the Crab nebula (C.U.) above 100 GeV. This implies an increase by a factor of about 5 with respect to the previously measured VHE flux from this object above the same energy threshold. NGC 1275 is a Fanaroff-Riley I radio galaxy located at the red shift 0.018 in the Perseus Cluster of galaxies, and was first reported as a VHE emitter in Aleksic et al., 2012 (A&A, 539, L2). It is one of only a few radio galaxies detected in the VHE range. The typical VHE flux (>100 GeV) of this object is about 3% C.U. (Aleksic et al. 2014, A&A, 564, A5). MAGIC observations of NGC 1275 will continue during the next days and multi-wavelength observations are encouraged. The MAGIC contact persons for these observations are R. Mirzoyan (Razmik.Mirzoyan@mpp.mpg.de), P. Colin (colin@mppmu.mpg.de) and D. Glawion (dorit.glawion@astro.uni-wuerzburg.de). MAGIC is a system of two 17m-diameter Imaging Atmospheric Cherenkov Telescopes located at the Canary island of La Palma, Spain, and designed to perform gamma-ray astronomy in the energy range from 50 GeV to greater than 50 TeV.
Izvorni jezik: ENG
Znanstvena područja:
Fizika
URL Internet adrese: http://www.astronomerstelegram.org/?read=9689
Upisao u CROSBI: Dario Hrupec (dhrupec@fizika.unios.hr), 14. Stu. 2016. u 11:56 sati



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