Development of a new background reduction method for wxm/hete-2 and its application for bright GRB spectra

I. Takahashi, Y. E. Nakagawa, A. Yoshida, S. Sugita, T. Tamagawa, M. Kuwahara, N. Kawai, M. Arimoto, T. Shimokawabe, T. Ishimura, N. Vasquez, M. Suzuki, R. Sato, Y. Shirasaki, George R. Ricker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

HETE-2 detected gamma-ray bursts (GRBs) since its launch on 9 October 2000. For spectral analyses using data of WXM on-board HETE-2, background spectra are conventionally obtained with time regions before and/or after prompt emission. In some cases, the background spectra change during the prompt emission and/or the downlink trouble causes a loss of data around the prompt emission. If this is the case, the problem seems to lie in the fact that the conventional method cannot obtain correct background spectra. To make more appropriate background spectra, we develop a new analysis method using mask patterns of the WXM. The background spectra are estimated with shaded regions by the WXM mask pattern using the prompt emission data. Our new method might obtain a reliable result for a spectrum of GRB 030329. In this paper, we introduce our new analysis method and show a preliminary spectral result.

Original languageEnglish
Title of host publicationGamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference
Pages174-177
Number of pages4
Volume1000
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007 - Santa Fe, NM
Duration: 2007 Nov 52007 Nov 9

Other

OtherSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007
CitySanta Fe, NM
Period07/11/507/11/9

Keywords

  • GRB

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Takahashi, I., Nakagawa, Y. E., Yoshida, A., Sugita, S., Tamagawa, T., Kuwahara, M., Kawai, N., Arimoto, M., Shimokawabe, T., Ishimura, T., Vasquez, N., Suzuki, M., Sato, R., Shirasaki, Y., & Ricker, G. R. (2008). Development of a new background reduction method for wxm/hete-2 and its application for bright GRB spectra. In Gamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference (Vol. 1000, pp. 174-177) https://doi.org/10.1063/1.2943438