The burst alert telescope (BAT) on the Swift MIDEX mission

被引：1475

作者：

Barthelmy, SD ^{[1
]}

Barbier, LM

Cummings, JR

Fenimore, EE

Gehrels, N

Hullinger, D

Krimm, HA

Markwardt, CB

Palmer, DM

Parsons, A

Sato, G

Suzuki, M

Takahashi, T

Tashiro, M

Tueller, J

机构：

[1] NASA, Goddard Space Flight Ctr, High Energy Phys Lab, Greenbelt, MD 20771 USA

[2] CNR, Washington, DC 20418 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[5] Univ Space Res Assoc, Columbia, MD 21044 USA

[6] Inst Space & Astronaut Sci, Kanagawa 2298510, Japan

[7] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 113, Japan

来源：

SPACE SCIENCE REVIEWS | 2005年 / 120卷 / 3-4期

关键词：

gamma-ray; GRB; hard X-ray; survey; burst; afterglow; CZT; coded aperture; astrophysics; cosmology;

D O I：

10.1007/s11214-005-5096-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The burst alert telescope (BAT) is one of three instruments on the Swift MIDEX spacecraft to study gamma-ray bursts (GRBs). The BAT first detects the GRB and localizes the burst direction to an accuracy of 1-4 arcmin within 20s after the start of the event. The GRB trigger initiates an autonomous spacecraft slew to point the two narrow field-of-view (FOV) instruments at the burst location within 20-70 s so to make follow-up X-ray and optical observations. The BAT is a wide-FOV, coded-aperture instrument with a CdZnTe detector plane. The detector plane is composed of 32,768 pieces of CdZnTe (4x4x2 mm), and the coded-aperture mask is composed of similar to 52,000 pieces of lead (5x5x1 mm) with a 1-m separation between mask and detector plane. The BAT operates over the 15-150 keV energy range with similar to 7 keV resolution, a sensitivity of similar to 10(-8) ergg s(-1) cm(-2), and a 1.4 sr (half-coded) FOV. We expect to detect >100 GRBs/year for a 2-year mission. The BAT also performs an all-sky hard X-ray survey with a sensitivity of similar to 2 m Crab (systematic limit) and it serves as a hard X-ray transient monitor.

引用

页码：143 / 164

页数：22

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