Naslov
MAGIC detection of a giant flaring activity from NGC 1275 at very-high-energy gamma rays

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)

Kolaboracija
MAGIC Collaboration

Izvornik
The Astronomer's Telegram, #9929

Vrsta, podvrsta
Ostale vrste radova, ostalo

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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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