EGRET DETECTION OF HIGH-ENERGY GAMMA-RAYS FROM THE GAMMA-RAY BURST OF 3 MAY 1991

被引：0

作者：

SCHNEID, EJ

BERTSCH, DL

FICHTEL, CE

HARTMAN, RC

HUNTER, SD

KANBACH, G

KNIFFEN, DA

KWOK, PW

LIN, YC

MATTOX, JR

MAYERHASSELWANDER, HA

MICHELSON, PF

VONMONTIGNY, C

NOLAN, PL

PINKAU, K

ROTHERMEL, H

SOMMER, M

SREEKUMAR, P

THOMPSON, DJ

机构：

[1] NASA, GODDARD SPACE FLIGHT CTR, NATL ACAD SCI, GREENBELT, MD 20771 USA

[2] STANFORD UNIV, HANSEN EXPTL PHYS LAB, STANFORD, CA 94305 USA

[3] NASA, GODDARD SPACE FLIGHT CTR, COMP SCI CORP, GRO SCI SUPPORT CTR, GREENBELT, MD 20771 USA

[4] NASA, GODDARD SPACE FLIGHT CTR, UNIV SPACE RES ASSOC, GREENBELT, MD 20771 USA

[5] MAX PLANCK INST EXTRATERRESTR PHYS, W-8046 GARCHING, GERMANY

[6] HAMPDEN SYDNEY COLL, HAMPDEN SYDNEY, VA 23943 USA

来源：

ASTRONOMY & ASTROPHYSICS | 1992年 / 255卷 / 1-2期

关键词：

GAMMA-RAYS; BURSTS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

On May 3, 1991, the Energetic Gamma Ray Experiment Telescope (EGRET) on the Compton Gamma Ray Observatory detected a gamma-ray burst both in the energy measurement subsystem and independently in the spark chamber assembly. Six individual photons were detected in the spark chamber, allowing a determination of the burst arrival direction which was l(II) = 171.9-degrees +/- 1.3-degrees, b(II) = 5.3-degrees +/- 1.1-degrees. Three energy spectra were measured from 1 to 200 MeV; they were measured during the first second after the BATSE trigger, the next two seconds and the subsequent four seconds. The first two spectra exhibit a similar differential spectra index of about -2.2 with no apparent high-energy cut-off. By the time of the third spectrum, and additional soft component is evident.

引用

页码：L13 / L16

页数：4

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