Naslov
MAGIC detection of renewed activity from the radio galaxy IC 310

Autori
Aleksić, Jelena ; ... ; Dominis Prester, Dijana ; ... ; Ferenc, Daniel ; ... ; Godinović, Nikola ; ... ; Hrupec, Dario ; ... ; Lelas, Damir ; ... ; Puljak, Ivica ; ... ; Surić, Tihomir ; ... ; Šnidarić, Iva ; ... ; Terzić, Tomislav ; ...

Izvornik
The Astronomer's Telegram, #4583

Vrsta, podvrsta
Ostale vrste radova, ostalo

Godina
2012

Ključne riječi
Gamma Ray ; TeV ; VHE ; Request for Observations ; AGN

Sažetak
The MAGIC telescopes have observed a high VHE (E>~100 GeV) gamma-ray flux from the galaxy IC 310. The object (RA: 03h 16m 43.0s, Dec: +41d 19m 29s, J2000) is a TeV radio-loud galaxy located in the Perseus Cluster of galaxies at redshift 0.0189 (Falco et al. 1999). Although formerly considered to be an archetypical head-tail galaxy, recent radio-interferometric observations have shown that IC 310 hosts a blazar-type central engine (Kadler et al. 2012, A&A, 538, L1). The source was discovered as a VHE emitter by MAGIC in the 2009-2010 campaign, showing a mean flux level of (2.5 +- 0.4)% of the Crab Nebula flux above 300 GeV (J. Aleksic et al. (MAGIC Coll.), Astrophys. J. 723(2010) L207). MAGIC observations were carried out on November 12, 2012 (MJD 56243.9 - 56244.1) right after the upgrade of the MAGIC telescopes has been completed. Preliminary analysis resulted in a detection with the significance of 25 standard deviations. The mean flux above 300 GeV is higher than 50% of the Crab Nebula flux which is the highest ever detected from IC 310 in the VHE range. MAGIC will continue to observe the source and multi-frequency observations are strongly encouraged.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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