| タイトル | BATSE Observations of Gamma-Ray Burst Spectra |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970025926 |
| 著者（英） | Band, D. L.; Matteson, J. L.; Paciesas, W. S.; Meegan, C. A.; Skelton, R. T.; Pendleton, G. N.; Preece, R. D.; Briggs, M. S. |
| 著者所属（英） | NASA Marshall Space Flight Center |
| 発行日 | 1996-12-10 |
| 言語 | eng |
| 内容記述 | We analyze time-averaged spectra from 86 bright gamma-ray bursts from the first 5 years of the Burst And Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory to determine whether the lowest energy data are consistent with a standard spectra form fit to the data at all energies. The BATSE Spectroscopy Detectors have the capability to observe photons as low as 5 keV. Using the gamma-ray burst locations obtained with the BATSE Large Area Detectors, the Spectroscopy Detectors' low-energy response can be modeled accurately. This, together with a postlaunch calibration of the lowest energy Spectroscopy Detector discriminator channel, which can lie in the range 5-20 keV, allows spectral deconvolution over a broad energy range, approx. 5 keV to 2 MeV. The additional coverage allows us to search for evidence of excess emission, or for a deficit, below 20 keV. While no burst has a significant (greater than or equal to 3 sigma) deficit relative to a standard spectra model, we find that 12 bursts have excess low-energy emission, ranging between 1.2 and 5.8 times the model flux, that exceeds 5 sigma in significance. This is evidence for an additional low-energy spectral component in at least some bursts, or for deviations from the power-law spectral form typically used to model gamma-ray bursts at energies below 100 keV. |
| NASA分類 | Space Radiation |
| レポートNO | 97N25362
N ASA-CR-204724
NAS 1.26:204724 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/101000 |
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