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The "amplitude" parameter of Gamma-Ray Bursts and its implications for GRB classification
Hou-Jun Lü, Bing Zhang, En-Wei Liang +2
Traditionally gamma-ray bursts (GRBs) are classified in the -hardness ratio two-dimensional plane into long/soft and short/hard GRBs. In this paper, we suggest to add the "…
Discovery of X-ray Emission in the Old Classical Nova DK Lacertae
D. Takei, T. Sakamoto, J. J. Drake
We report the discovery of X-ray emission at the position of the old classical nova DK Lacertae using the Swift satellite. Three observations were conducted using the X-ray telesco…
Spectral Comparison of Weak Short Bursts to the Persistent X-rays from the Magnetar 1E 1547.0-5408 in its 2009 Outburst
Teruaki Enoto, Yujin E. Nakagawa, Takanori Sakamoto +1
In January 2009, the 2.1-sec anomalous X-ray pulsar 1E 1547.0-5408 evoked intense burst activity. A follow-up Suzaku observation on January 28 recorded enhanced persistent emission…
Long Duration X-Ray Flash and X-Ray Rich Gamma Ray Burst from Low Mass Population III Star
Daisuke Nakauchi, Yudai Suwa, Takanori Sakamoto +2
Recent numerical simulations suggest that Population III (Pop III) stars were born with masses not larger than but typically . By self-consis…
A Jet Break in the X-ray Light Curve of Short GRB 111020A: Implications for Energetics and Rates
Wen-fai Fong, Edo Berger, Raffaella Margutti +8
We present broad-band observations of the afterglow and environment of the short GRB 111020A. An extensive X-ray light curve from Swift/XRT, XMM-Newton and Chandra, spanning ~100 s…
GRB 110709A, 111117A and 120107A: Faint high-energy gamma-ray photon emission from Fermi/LAT observations and demographic implications
Weikang Zheng, Carl W. Akerlof, Shashi B. Pandey +4
Launched on June 11, 2008, the LAT instrument onboard the Gamma-ray Space Telescope has provided a rare opportunity to study high energy photon emission from gamma-ray burs…