OSSE spectral analysis techniques

Details OSSE spectral analysis techniques OSSE spectral analysis techniques

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.

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