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Pregled bibliografske jedinice broj: 903949

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 a giant flaring activity from NGC 1275 at very-high-energy gamma rays
Izvornik: The Astronomer's Telegram, #9929
Vrsta: otkriće
Godina: 2017
Ključne riječi: Gamma Ray ; TeV ; VHE ; AGN
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 during the night between 31 December 2016 and 1 January 2017 indicates a flux of about 1.5 times the flux from the Crab nebula (C.U.) above 100 GeV. The flux was nearly 10 times larger than the flare reported in October 2016 (ATel #9689) and about 60 times larger than the low state of the source (Aleksic et al. 2014, A&A, 564, A5). Further observations by MAGIC performed on the night of 2nd to 3rd of January still reveal a flaring state of about 0.7 C.U. above 100 GeV. MAGIC observed the source for 2.4 hours in each of the two nights, 4.8 hours in total. NGC 1275 is a Fanaroff-Riley I radio galaxy located at redshift 0.018 in the Perseus Cluster of galaxies, and was first reported as a VHE gamma-ray emitter in Aleksic et al., 2012 (A&A, 539, L2). It is one of only few radio galaxies detected in the VHE gamma-ray range. MAGIC observations of NGC 1275 will continue during the next days and multi-wavelength observations are encouraged. The MAGIC contact person for these observations is R. Mirzoyan (Razmik.Mirzoyan@mpp.mpg.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.
Projekt / tema: HRZZ-IP-06-2016-9782
Izvorni jezik: ENG
Znanstvena područja:
Fizika
Upisao u CROSBI: Dario Hrupec (dhrupec@fizika.unios.hr), 7. Stu. 2017. u 21:21 sati



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