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The Imprint of The Extragalactic Background Light in the Gamma-Ray Spectra of Blazars
LAT Collaboration
The light emitted by stars and accreting compact objects through the history of the Universe is encoded in the intensity of the extragalactic background light (EBL). Knowledge of t…
Optical Behavior of GRB 061121 around its X-Ray Shallow Decay Phase
T. Uehara, M. Uemura, A. Arai +8
Aims. We report on a detailed study of the optical afterglow of GRB 061121 with our original time-series photometric data. In conjunction with X-ray observations, we discuss the or…
Fe-K line probing of material around the AGN central engine with Suzaku
Yasushi Fukazawa, Kazuyoshi Hiragi, Motohiro Mizuno +6
We systematically analyzed the high-quality Suzaku data of 88 Seyfert galaxies. We obtained a clear relation between the absorption column density and the equivalent width of the 6…
Infrared/optical - X-ray simultaneous observations of X-ray flares in GRB 071112C and GRB 080506
T. Uehara, M. Uemura, K. S. Kawabata +13
We investigate the origin of short X-ray flares which are occasionally observed in early stages of afterglows of gamma-ray bursts (GRBs). We observed two events, GRB 071112C and GR…
Swifts GRB GRB071010B : outlier of the and correlations
Yuji Urata, Kuiyun Huang, Myungshin Im +12
We present multi-band results for GRB071010B based on \Swift, \Suzaku, and ground-based optical observations. This burst is an ideal target to evaluate the robustness of the ${\rm…