伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章，另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.
ECLAIRs将在2011年上天，将是那时候唯一能准确定位伽玛暴的探测器。预期可探测80暴/年。 仪器特点如下：
• the study of the prompt X-ray emission associated to GRBs
• the detection of a large sample of soft GRBs, potentially the most distant ones,
thanks to the 4–50 keV triggering band
• the broad band spectra (from 1 keV to a few MeV)
• the prompt (and/or precursive) optical emission
ECLAIRs is the next space borne instrument that will be fully dedicated to multi-wavelength studies of Gamma-Ray Bursts (GRBs). It consists of a coded mask telescope with a wide (~2 sr) field of view, made of 6400 CdTe pixels (~1000 cm^2), which will work in the 4-300 keV energy band. It is expected to localise ~80 GRBs/yr, thanks to the on-board real time event processing. The GRBs (and other transients) coordinates will be distributed within a few seconds from the onset of the burst with a typical uncertainty of ~5-10 arcmin. The detection system will also include a soft X-ray camera (1-10 keV) allowing to study in detail the prompt soft X-ray emission and to reduce the error box for about half of the GRBs seen by ECLAIRs to ~30 arcsec. ECLAIRs is expected to be flown in late 2011 and to be the only instrument capable of providing GRB triggers with sufficient localisation accuracy for GRB follow-up observations with the powerful ground based spectroscopic telescopes available by then. We will present the current status of the ECLAIRs project and its possible developments.
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