NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Initial OSSE Sky Survey Observation: Deep Survey in the Virgo RegionThe OSSE Virgo survey covered about 1% of the sky, using eight weeks of observing time on the Compton Gamma Ray Observatory, and was performed in conjunction with the EGRET and COMPTEL instruments on CGRO. A fundamental aspect of the survey was the development of data reduction techniques for the scanning data from the OSSE detectors. A direct algebraic approach for spatially deconvolving the data was developed. For the survey work, no background observations isolated from the survey region were acquired, unlike normal discrete source observations. The survey, reduction method covers the mapped region with a grid of pixels, and estimates the flux from each pixel by least-squares agreement with the data, assuming positivity constraints. This technique has led to the detection of compact sources at hard X-ray energies within the Virgo region, and the OSSE survey studies have been extended to the south galactic pole and north Ecliptic pole, with similar analysis techniques.
Document ID
20000021002
Acquisition Source
Goddard Space Flight Center
Document Type
Contractor or Grantee Report
Authors
Cameron, Robert
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 2000
Subject Category
Astronomy
Funding Number(s)
CONTRACT_GRANT: NAG5-2670
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available