IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
The Discovery of gamma-ray emission from the Blazar RGB J0710+591
Autor/es:
THE VERITAS COLLABORATION ET ALL., SON 237 AUTORES, A. PICHEL
Revista:
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2010 vol. 715L p. 49 - 55
ISSN:
0067-0049
Resumen:
The high-frequency-peaked BL Lacertae object RGB J0710+591 was observed in the very high-energy (VHE; E
> 100 GeV) wave band by the VERITAS array of atmospheric Cherenkov
telescopes. The observations, taken between 2008 December and 2009
March and totaling 22.1 hr, yield the discovery of VHE gamma rays from
the source. RGB J0710+591 is detected at a statistical significance of
5.5 standard deviations (5.5σ) above the background, corresponding to
an integral flux of (3.9 ± 0.8) × 1012 cm2 s1
(3% of the Crab Nebula's flux) above 300 GeV. The observed spectrum can
be fit by a power law from 0.31 to 4.6 TeV with a photon spectral index
of 2.69 ± 0.26stat ± 0.20sys. These data are complemented by contemporaneous multiwavelength data from the Fermi Large Area Telescope, the Swift X-ray Telescope, the Swift
Ultra-Violet and Optical Telescope, and the Michigan-Dartmouth-MIT
observatory. Modeling the broadband spectral energy distribution (SED)
with an equilibrium synchrotron self-Compton model yields a good
statistical fit to the data. The addition of an external-Compton
component to the model does not improve the fit nor brings the system
closer to equipartition. The combined Fermi and VERITAS data
constrain the properties of the high-energy emission component of the
source over 4 orders of magnitude and give measurements of the rising
and falling sections of the SED.