Palmer, D. M. and Schindler, S. M. and Cook, W. R. and Grunsfeld, J. M. and Heindl, William A. and Prince, Thomas A. and Stone, E. C.
(1993)
Gamma-Ray Continuum and Line Observations of Supernova 1987A.
Astrophysical Journal, 412
(1).
pp. 203-212.
ISSN 0004-637X.
https://resolver.caltech.edu/CaltechAUTHORS:20140516-103357364
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Abstract
The Caltech gamma-ray imaging telescope observed the hard X-ray and gamma-ray emission from SN 1987A as it
evolved between 1987 May and 1989 April, in a series of four balloon flights from Alice Springs, NT, Australia.
Observations of the Crab Nebula and Pulsar provided in-flight data on pointing accuracy and instrument
function for each flight. Results presented here include our measurements on 1987 November 18 (D268)
and 1988 April 12 (D414) of both line emission at 847 and 1238 keV from the decay of ^(56)Co, and Compton scattered
continuum above 50 keV. Upper limits for both line and continuum emission were obtained on 1987
May 20 (D86) and 1989 April 4 (D771). For the D268 and D414 continuum measurements our results are
best-fit by a different~al p_ower law of the form dN/dE = kE^(-y)(c,^(-2)s^(-1)keV^(-1)for the energy range 50-800
keV. Our corresponding line measurements were fit with Gaussian profiles, containing additional terms for the
underlying continuum. We compare our flux measurements and upper limits to those from other experiments
and to predictions of theoretical models.
Item Type: | Article |
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Additional Information: | © 1993 The American Astronomical Society.
Received 1992 December 8; accepted 1993 January 27.
We acknowledge the important contributions to the development of the GRIP instrument made by W. Althouse, D.
Burke, A. Cummings, M. Finger, C. Starr, J. Weger, and the
personnel of the Central Engineering Services at the California
Institute of Technology. We thank the personnel of the
National Scientific Balloon Facility and the NASA Wallops
Flight Facility for their excellent balloon launch support. This
work was supported in part by NASA grants NGR 05-002-160
and NAGW-1919. |
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Group: | Space Radiation Laboratory |
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Funders: | Funding Agency | Grant Number |
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NASA | NGR 05-002-160 | NASA | NAGW-1919 |
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Non-Subject Keywords: | gamma rays: observations - supernovae: individual (SN 1987A) |
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Other Numbering System: | Other Numbering System Name | Other Numbering System ID |
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Space Radiation Laboratory | 1993-22 |
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Issue or Number: | 1 |
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Record Number: | CaltechAUTHORS:20140516-103357364 |
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Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140516-103357364 |
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Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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ID Code: | 45798 |
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Collection: | CaltechAUTHORS |
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Deposited By: |
Deborah Miles
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Deposited On: | 20 May 2014 20:59 |
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Last Modified: | 20 Feb 2020 14:33 |
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