<i>FERMI</i> -large area telescope observations of the exceptional gamma-ray outbursts of 3C 273 in 2009 September [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2010.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:: pages L73-L78 : digital, PDF file
Additional Creators:: United States. Department of Energy, National Aeronautics and Space Administration Announcement, and United States. Department of Energy. Office of Scientific and Technical Information

Access Online

www.osti.gov

Availability

Finding items...

Restrictions on Access:

Free-to-read Unrestricted online access

Summary:

Here, we present the light curves and spectral data of two exceptionally luminous gamma-ray outbursts observed by the Large Area Telescope experiment on board the Fermi Gamma-ray Space Telescope from 3C 273 in 2009 September. During these flares, having a duration of a few days, the source reached its highest γ-ray flux ever measured. This allowed us to study, in some details, their spectral and temporal structures. The rise and the decay are asymmetric on timescales of 6 hr, and the spectral index was significantly harder during the flares than during the preceding 11 months. Lastly, we also found that short, very intense flares put out the same time-integrated energy as long, less intense flares like that observed in 2009 August.

Report Numbers:

E 1.99:1357562

Subject(s):

Astronomy And Astrophysics

Other Subject(s):

Note:

Published through SciTech Connect.
04/05/2010.
Astrophysical Journal Letters 714 1 ISSN 2041-8205 AM
Abdo, A.; Ackermann, M.; Ajello, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.; Bloom, E.; Bonamente, E.; Borgland, A.; Bouvier, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T.; Buson, S.; Caliandro, G.; Cameron, R.; Cannon, A.; Caraveo, P.; et al.
SLAC National Accelerator Lab., Menlo Park, CA (United States)

Funding Information:

AC02-76SF00515

View MARC record | catkey: 23496541