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HAL: hal-00286251, version 1
arXiv: astro-ph/0703045
ADS Bibliographic id: 2007PASJ...59..695A
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Publications of the Astronomical Society of Japan 59 (2007) 695-702
HETE-2 Observations of the X-Ray Flash XRF 040916
Makoto Arimoto, Nobuyuki Kawai, Motoko Suzuki 1, 2, Rie Sato 3, Nicolas Vasquez Pazmino, Takashi Shimokawabe, Takuto Ishimura, Jun'ichi Kotoku, Atsumasa Yoshida 4, Toru Tamagawa, Yuji Shirasaki, Masaru Matsuoka, Yujin Nakagawa, Nobuyuki Ishikawa 5, 6, Akina Kobayashi 7, 8, Satoshi Sugita, Ichiro Takahashi, Makoto Kuwahara, Makoto Yamauchi, Kunio Takagishi, Isamu Hatsukade 9, Jean-Luc Atteia 10, Alexandre Pelangeon 11, Roland Vanderspek, Carlo Graziani, Gregory Prigozhin, Joel Villasenor, J. Garrett Jernigan, Geoffrey B. Crew, Kevin Hurley, Takanori Sakamoto, George R. Ricker 12, Stanford E. Woosley, Nat Butler, Al Levine 13, John P. Doty, Timothy Q. Donaghy, Donald Q. Lamb 14, Edward E. Fenimore, Mark Galassi 15, 16, Michel Boer 17, 18, Jean-Pascal Dezalay 17, Jean-François Olive 17, 19, Joao Braga 20, 21, Ravi Manchanda 22, Graziella Pizzichini
(2007-06)
A long X-ray flash was detected and localized by instruments aboard the High Energy Transient Explorer II (HETE-2) at 00:03:30 UT on 2004 September 16. The position was reported to the GRB Coordinates Network (GCN) approximately 2 hours after the burst. This burst consisted of two peaks separated by ? 200 s, with durations of about 110 s and 60 s. We analyzed the energy spectra of the 1st and 2nd peaks observed with the Wide Field X-Ray Monitor (WXM) and the French Gamma Telescope (FREGATE). We discuss the origin of the 2nd peak in terms of the flux variabilities and timescales. We find that it is most likely to be part of prompt emission, and is explained by a long-acting engine model. This feature is similar to some bright X-ray flares detected in the early afterglow phase of bursts observed by the Swift satellite.
1:  Department of Physics
Sophia University
2:  Botanical Garden, Graduate School of Science
Tohoku University, Sendai
3:  Department of Electrical Engineering
Tohoku University
4:  Littérature Française
Université Paris VIII - Vincennes Saint-Denis
5:  Japan Atomic Energy Agency (JAEA-Tokai)
Japan Atomic Energy Agency
6:  Japan Atomic Energy Agency (JAEA)
Japan Atomic Energy Agency
7:  Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB)
CNRS : UPR9048 – Université de Bordeaux – Ecole Nationale Supérieure de Chimie, de Biologie et de Physique
8:  Department of Humanities and Sciences (NIHON UNIVERSITY)
Nihon University
9:  Faculty of Engineering
Miyazaki University
10:  Laboratoire Astrophysique de Toulouse-Tarbes (LATT)
CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III
11:  Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT)
CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III
12:  Center for Space Research
Massachussetts Institute of Technology
13:  Institut de génétique et microbiologie (IGM)
CNRS : UMR8621 – Université Paris XI - Paris Sud
14:  Department of Astronomy and Astrophysics
University of Chicago
15:  CONICET-UNR
Instituto de la física – Universidad Nacional de Rosario
16:  CONICET-UNR
university of Rosario
17:  Centre d'étude spatiale des rayonnements (CESR)
CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
18:  Observatoire de Haute-Provence (OHP)
CNRS : USR2207 – INSU – Université de Provence - Aix-Marseille I
19:  UMS 831 unité mixte de service (UMS 831)
CNRS : UMS831 – Institut de recherche pour le développement [IRD] – CNES – INSU – Université Paul Sabatier [UPS] - Toulouse III – Observatoire Midi-Pyrénées
20:  Laboratoire d'Anthropobiologie (FRE 2960)
Université Paul Sabatier [UPS] - Toulouse III
21:  Laboratoire d'Anthropobiologie (LA)
CNRS : FRE2960 – Université Paul Sabatier [UPS] - Toulouse III – Université Toulouse le Mirail - Toulouse II – École des Hautes Études en Sciences Sociales [EHESS]
22:  Institute for Plasma Research
Institute for Plasma Research
Subject :  Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics
Keyword(s): gamma-rays: bursts – X-rays: bursts – X-rays: individual (XRF 040916)
Fulltext link: 
http://fr.arXiv.org/abs/astro-ph/0703045
hal-00286251, version 1
http://hal.archives-ouvertes.fr/hal-00286251
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From: Dominique Lullier <>
Submitted on: Monday, 9 June 2008 09:31:57
Updated on: Monday, 9 June 2008 09:31:57