RT Journal Article
T1 Discovery of very high energy gamma-rays from Markarian 180 triggered by an optical outburst
A1 Antoranz Canales, Pedro
A1 Barrio Uña, Juan Abel
A1 Contreras González, José Luis
A1 Fonseca González, María Victoria
A1 López Moya, Marcos
A1 Miranda Pantoja, José Miguel
AB The high-frequency-peaked BL Lacertae object Markarian 180 (Mrk 180) was observed to have an optical outburst in 2006 March, triggering a Target of Opportunity observation with the MAGIC telescope. The source was observed for 12.4 hr, and very high energy gamma-ray emission was detected with a significance of 5.5 sigma. An integral flux above 200 GeV of (2.3 +/- 0.7) x 10(-11) cm(-2) s(-1) was measured, corresponding to 11% of the Crab Nebula flux. A rather soft spectrum with a photon index of has been determined. No significant flux -3.3 x 0.7 variation was found.
PB IOP Publishing
SN 0004-637X
YR 2006
FD 2006-09-10
LK https://hdl.handle.net/20.500.14352/50919
UL https://hdl.handle.net/20.500.14352/50919
LA eng
NO © The American Astronomical Society. We would like to thank the IAC for the excellent working conditions at the ORM in La Palma. The support of the German BMBF and MPG, the Italian INFN, the Spanish CICYT, ETH research grant TH 34/04 3, and the Polish MNiI grant 1P03D01028 is gratefully acknowledged. We also thank H. D. and M. F. Aller, at the University of Michigan Radio Observatory, for providing us with the UMRAO data.
NO German BMBF
NO German MPG
NO Italian INFN
NO Spanish CICYT
NO ETH
NO Polish MNiI
DS Docta Complutense
RD 20 abr 2025