HETE-2 Observations of the X-Ray Flash XRF 040916
Abstract
A long X-ray flash was detected and localized by the 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 consists of two peaks separated by 200 s, with durations of 110 s and 60 s. We have 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 flux variabilities and timescales. We find that it is most likely part of the prompt emission, and is explained by the 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.
Cite
@article{arxiv.astro-ph/0703045,
title = {HETE-2 Observations of the X-Ray Flash XRF 040916},
author = {Makoto Arimoto and Nobuyuki Kawai and Atsumasa Yoshida and Toru Tamagawa and Yuji Shirasaki and Motoko Suzuki and Masaru Matsuoka and Jun'ichi Kotoku and Rie Sato and Takashi Shimokawabe and Nicolas Vasquez Pazmino and Takuto Ishimura and Yujin Nakagawa and Nobuyuki Ishikawa and Akina Kobayashi and Satoshi Sugita and Ichiro Takahashi and Makoto Kuwahara and Makoto Yamauchi and Kunio Takagishi and Isamu Hatsukade and Jean-Luc Atteia and Alexandre Pelangeon and Roland Vanderspek and Carlo Graziani and Gregory Prigozhin and Joel Villasenor and J. Garrett Jernigan and Geoffrey B. Crew and Kevin Hurley and Takanori Sakamoto and George R. Ricker and Stanford E. Woosley and Nat Butler and Al Levine and John P. Doty and Timothy Q. Donaghy and Donald Q. Lamb and Edward E. Fenimore and Mark Galassi and Michel Boer and Jean-Pascal Dezalay and Jean-Francios Olive and Joao Braga and Ravi Manchanda and Graziella Pizzichini},
journal= {arXiv preprint arXiv:astro-ph/0703045},
year = {2015}
}
Comments
9 pages, 4 figures, Accepted for publication in PASJ