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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク GRB 020813 ： ウィキペディア英語版 GRB 020813 GRB 020813 was a gamma-ray burst (GRB) that was detected on 13 August 2002 at 02:44 UTC. A gamma-ray burst is a highly luminous flash associated with an explosion in a distant galaxy and producing gamma rays, the most energetic form of electromagnetic radiation, and often followed by a longer-lived "afterglow" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, and radio). == Observations == GRB 020813 was detected on 13 August 2002 02:44 UTC by multiple instruments on the High Energy Transient Explorer. The burst lasted approximately 125 seconds. The initial position was estimated to be at a right ascension of and a declination of . In less than two hours after the burst had been detected, optical observations of the region were made with the Katzman Automatic Imaging Telescope which reveal the burst's optical afterglow. In the days following the event, observations were made by the Chandra X-ray Observatory, which detected a fading X-ray afterglow. The redshift for this event was approximately z = 1.254. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「GRB 020813」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.