FEASIBILITY OF A SMALL, RAPID OPTICAL/IR RESPONSE, NEXT GENERATION GAMMA-RAY BURST MISSION

Gamma-ray Bursts: 15 Years of GRB Afterglows Pub Date : 2012-12-28 DOI:10.1051/eas/1361100

B. Grossan, G. Smoot, V. Bogomolov, S. Svertilov, N. Vedenkin, M. Panasyuk, B. Goncharov, G. Rozhkov, K. Saleev, E. Grobovskoj, A. S. Krasnov, V. Morozenko, V. Osedlo, E. Rogkov, T. V. Vachenko, E. Linder, Extreme Universe Laboratory, M. University, Russian Federation., University of Maryland Baltimore County Jet Propulsion Laboratory, Usa, U. Berkeley

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Abstract

We present motivations for and study feasibility of a small, rapid optical to IR response gamma ray burst (GRB) space observatory. By analyzing existing GRB data, we give realistic detection rates for X-ray and optical/IR instruments of modest size under actual flight conditions. Given new capabilities of fast optical/IR response (about 1 s to target) and simultaneous multi-band imaging, such an observatory can have a reasonable event rate, likely leading to new science. Requiring a Swift-like orbit, duty cycle, and observing constraints, a Swift-BAT scaled down to 190 square cm of detector area would still detect and locate about 27 GRB per yr. for a trigger threshold of 6.5 sigma. About 23 percent of X-ray located GRB would be detected optically for a 10 cm diameter instrument (about 6 per yr. for the 6.5 sigma X-ray trigger).

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小型，快速光学/红外响应，下一代伽马射线爆发任务的可行性

我们提出了一个小型的、快速的光学红外响应伽玛射线暴(GRB)空间天文台的动机和研究的可行性。通过对现有GRB数据的分析，给出了中等尺寸的x射线和光学/红外仪器在实际飞行条件下的真实探测率。鉴于快速光学/红外响应(到目标约1秒)和同时多波段成像的新能力，这样的天文台可以有一个合理的事件率，可能会导致新的科学。在触发阈值为6.5西格玛的情况下，斯威夫特- bat需要类似斯威夫特的轨道、占空比和观测约束，缩小到190平方厘米的探测器面积，仍然可以每年探测和定位大约27个GRB。对于直径10厘米的仪器，大约23%的x射线定位GRB将被光学检测到(对于6.5西格玛x射线触发器，大约每年6次)。

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Gamma-ray Bursts: 15 Years of GRB Afterglows

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