OBSERVATION OF SN-1987A WITH THE GAMMA-RAY SPECTROMETER HEXAGON

被引：5

作者：

CHAPUIS, CGL

WALLYN, P

DUROUCHOUX, P

MATTESON, J

PELLING, M

BOWMAN, B

BRIGGS, M

GRUBER, D

PETERSON, L

LINGENFELTER, R

CORK, C

LANDIS, D

LUKE, P

MADDEN, N

MALONE, D

PEHL, R

POLLARD, M

LIN, R

SMITH, D

FEFFER, P

HURLEY, K

VEDRENNE, G

NIEL, M

VONBALLMOOS, P

机构：

[1] UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093

[2] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[3] UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720

[4] CTR ETUD SPATIALE RAYONNEMENTS,F-31029 TOULOUSE,FRANCE

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 403卷 / 01期

关键词：

GAMMA-RAYS; OBSERVATIONS; SUPERNOVAE; INDIVIDUAL; (SN-1987A);

D O I：

10.1086/172206

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The HEXAGONE balloon-borne spectrometer was flown from Alice Springs (Australia) on 1989 May 22. HEXAGONE is a high-resolution gamma-ray spectrometer and consists of an array of twelve cooled germanium detectors (field of view 19-degrees at 511 keV). One of the observed targets was the supernova 1987A and it was seen during 9.9 hr, 818 days after the initial optical outburst. No significant hard X-ray or gamma-ray emission is detected in the final spectrum of SN 1987A. We report the upper limits of the flux values for the gamma-ray lines coming from the decay of radionuclides synthesized in this star such as Co-56, Co-57, or Ti-44. The results are consistent with models incorporating mixing of the radioactive nuclei in the ejecta 0.073 M. of Co-56, 3.1 10(-3) M. of Co-57 and 1.2 10(-4) M. of Ti-44.

引用

页码：332 / 335

页数：4

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