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Record Details

Record 36 of 2803
Search for Doppler-shifted gamma-ray emission from SS 433 using the SMM spectrometer
External Online Source: doi:10.1086/167669
Author and Affiliation:
Geldzahler, B. J.(Applied Research Corp., Landover, MD, United States)
Share, G. H.(Applied Research Corp., Landover, MD, United States)
Kinzer, R. L.(Applied Research Corp., Landover, MD, United States)
Magura, J.(U.S. Navy, E. O. Hulburt Center for Space Research, Washington, DC, United States)
Chupp, E. L.(New Hampshire, University, Durham, United States)
et al.
Abstract: Data accumulated from 1980 to 1983 with the Gamma Ray Spectrometer aboard NASA's Solar Maximum Mission (SMM) satellite were searched for evidence of red and blue Doppler-shifted 1.37 MeV Mg-24 nuclear lines from SS 433. The SMM data base covers 270 days when SS 433 was in the field of view and includes periods of radio flaring and quiescence. No evidence was found for Doppler-shifted line emission in any of the spectra. The range of 3-sigma upper limits for individual 9 day integration periods was 0.0008-0.0023 photons/sq cm per sec for the blue beam, encompassing the reported about 1.5 MeV line, and 0.0008-0.002 photons/sq cm per sec for the red beam, encompassing the reported about 1.2 MeV line; the average 3-sigma upper limit in each beam for shifted about 1.37 MeV lines is 0.0015 photons/sq cm per sec for single 9 day integrations. The 3-sigma upper limit on 1.37 MeV gamma-ray emission over 23 9-day integration intervals for the red beam and 28 intervals for the blue beam is 0.0002 photons/sq cm per sec. These new limits from SMM can be reconciled with the HEAO 3 results only if SS 433 emits gamma radiation at or above the SMM sensitivity limit on rare occasions due to variable physical conditions in the system.
Publication Date: Jul 15, 1989
Document ID:
19890058328
(Acquired Nov 28, 1995)
Accession Number: 89A45699
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 342; 1123-112
Publisher Information: United States
Contract/Grant/Task Num: NAS5-28609; BMFT-010K-017-ZA/WS/WRK-02754; NASA ORDER S-14513-D
Financial Sponsor: NASA; United States
Organization Source: Applied Research Corp.; Landover, MD, United States
Hulburt (E. O.) Center for Space Research; Washington, DC, United States
New Hampshire Univ.; Durham, NH, United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GAMMA RAY ASTRONOMY; SOLAR MAXIMUM MISSION; STELLAR SPECTRA; DOPPLER EFFECT; GAMMA RAY SPECTRA; HEAO 3; LINE SPECTRA; STANDARD DEVIATION; STELLAR MASS ACCRETION
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 15, 1989, p. 1123-1128.
Availability Source: Other Sources
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