RT Journal Article
T1 Detection of very high energy radiation from the BL lacertae object PG 1553+113 with the MAGIC telescope
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 In 2005 and 2006, the MAGIC telescope observed very high energy gamma-ray emission from the distant BL Lac object PG 1553 + 113. The overall significance of the signal was 8.8 sigma for 18.8 hr of observation time. The light curve shows no significant flux variations on a daily timescale; the flux level during 2005 was, however, significantly higher compared to 2006. The differential energy spectrum between similar to 90 and 500 GeV is well described by a power law with photon index. Gamma = 4.2 +/- 0.3. The combined 2005 and 2006 energy spectrum provides an upper limit of z = 0.74 on the redshift of the object.
PB IOP Publishing
SN 0004-637X
YR 2007
FD 2007-01-10
LK https://hdl.handle.net/20.500.14352/50917
UL https://hdl.handle.net/20.500.14352/50917
LA eng
NO © The American Astronomical Society. We would like to thank the IAC for the excellent working conditions at the La Palma Observatory at Roque de los Muchachos. We are grateful to the RXTE ASM team for their quick-look results. The support of the German BMBF and MPG, the Italian INFN, and the Spanish CICYT is gratefully acknowledged. This work was also supported by ETH research grant TH-34/04-3 and by Polish grant MNiI 1P03D01028.
NO German BMBF
NO German MPG
NO Italian INFN
NO Spanish CICYT
NO ETH
NO Polish grant MNiI
DS Docta Complutense
RD 8 abr 2025