主要内容:
精彩摘抄:
文章信息:
- · arXiv e-print (arXiv:1011.1301)
- · References in the Article
- · Also-Read Articles (Reads History)
- ·
- · Translate This Page
| Title: |
| Spectral Cross-calibration of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT Data using Gamma-Ray Bursts |
| Authors: |
| Sakamoto, T.; Pal'shin, V.; Yamaoka, K.; Ohno, M.; Sato, G.; Aptekar, R.; Barthelmy, S.; Baumgartner, W.; Cummings, J.; Fenimore, E.; Frederiks, D.; Gehrels, N.; Golenetskii, S.; Krimm, H.; Markwardt, C.; Onda, K.; Palmer, D.; Parsons, A.; Stamatikos, M.; Sugita, S.; Tashiro, M.; Tueller, J.; Ukwatta, T. |
| Publication: |
| eprint arXiv:1011.1301 |
| Publication Date: |
| 11/2010 |
| Origin: |
| ARXIV |
| Keywords: |
| Astrophysics - High Energy Astrophysical Phenomena |
| Comment: |
| 82 pages, 88 figures, accepted for publication in PASJ |
| Bibliographic Code: |
| 2010arXiv1011.1301S |
Abstract
We report on the spectral cross-calibration results of the Konus-Wind, the Suzaku/WAM, and the Swift/BAT instruments using simultaneously observed gamma-ray bursts (GRBs). This is the first attempt to use simultaneously observed GRBs as a spectral calibration source to understand systematic problems among the instruments. Based on these joint spectral fits, we find that 1) although a constant factor (a normalization factor) agrees within 20% among the instruments, the BAT constant factor shows a systematically smaller value by 10-20% compared to that of Konus-Wind, 2) there is a systematic trend that the low-energy photon index becomes steeper by 0.1-0.2 and Epeak becomes systematically higher by 10-20% when including the BAT data in the joint fits, and 3) the high-energy photon index agrees within 0.2 among the instruments. Our results show that cross-calibration based on joint spectral analysis is an important step to understanding the instrumental effects which could be affecting the scientific results from the GRB prompt emission data.
没有评论:
发表评论