Naslov
VERITAS and MAGIC Report Flaring in Very High Energy Gamma Rays from M87

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, #2542

Vrsta, podvrsta
Ostale vrste radova, ostalo

Godina
2010

Ključne riječi
Gamma Ray ; >GeV ; Request for Observations ; AGN

Sažetak
We report a strong flare in very high energy (VHE ; E > 100 GeV) gamma rays from the radio galaxy M87. M87 is being observed in a coordinated effort in 2010 by the ground-based VHE gamma-ray observatories VERITAS and MAGIC ; this effort is a continuation of the joint monitoring program which was initiated by VERITAS, MAGIC, and HESS in 2008. An increasing VHE gamma-ray flux level has been measured over the past several nights (starting on MJD 55291), reaching a historic high state of about 20% of the flux of the Crab Nebula during last night's observations (MJD 55295). This flare follows a state of low average VHE flux from M87 over the past few months after a flare was reported by MAGIC at the beginning of 2010 (ATel #2431). Observations by the VHE gamma-ray observatories will continue over the coming week. ToO observations with Chandra and the VLBA have been triggered. Observations at other wavelengths are encouraged.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA