Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137...15p&link_type=abstract
In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 15-25 (SEE N92-21874 12-90)
Astronomy and Astrophysics
Astronomy
2
Astronomical Spectroscopy, Data Acquisition, Line Spectra, Scintillation, Scintillation Counters, Spectrometers, Spectrum Analysis, Accumulations, Crystals, Low Noise, Sensitivity, Spacecraft Instruments, Variability
Scientific paper
Analysis of the spectra from the Oriented Scintillation Spectrometer Experiment (OSSE) is complicated because of the typically low signal to noise (approx. 0.1 percent) and the large background variability. The OSSE instrument was designed to address these difficulties by periodically offset-pointing the detectors from the source to perform background measurements. These background measurements are used to estimate the background during each of the source observations. The resulting background-subtracted spectra can then be accumulated and fitted for spectral lines and/or continua. Data selection based on various environmental parameters can be performed at various stages during the analysis procedure. In order to achieve the instrument's statistical sensitivity, however, it will be necessary for investigators to develop a detailed understanding of the instrument operation, data collection, and the background spectrum and its variability. A brief description of the major steps in the OSSE spectral analysis process is described, including a discussion of the OSSE background spectrum and examples of several observational strategies.
Brown Kevin M.
Grabelsky David Andrew
Johnson Neil W.
Jung Gregory V.
Kinzer Robert L.
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