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Published March 1997 | Version Published
Book Section - Chapter Open

Hard X-ray Imaging Survey of the Galactic Plane with the Caltech Gamma-Ray Imaging Payload GRIP-2

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Abstract

In a recent balloon flight on October 6-7, 1995, the Caltech coded aperture Gamma-Ray Imaging Payload (GRIP-2) imaged numerous fields in the Galactic plane and center in the 25 ke V - 600 ke V energy band. GRIP-2's large phoswich detector (3830 cm2), 15° (FWHM) field of view, 30' angular resolution and 6' point source localization ability make it ideally suited for surveying the accreting binary population of the Galaxy at high energy. We present a brief description of the instrument and we also report preliminary imaging results from our recent Southern hemisphere campaign and show the capabilities of this balloon-borne coded aperture telescope for hard X-ray/gamma ray imaging. Several galactic sources have so far been detected above 25 keV with GRIP-2: IE 1740.7-2942, GRS 1758-258, Cyg X-1, GX 339-4, GX 354-0, GX 1+4, GRS 1915+105, Cyg X-3, 4U 1700-377, 4U 1702-429, Terzan 2 and the Crab pulsar.

Additional Information

© European Space Agency. Provided by NASA ADS. We would like to thank Jill Burnham, Derrick Key and Brian Matthews for excellent technical support. We also thank the staff and launch crew at the National Scientific Balloon Facility for two very successful flights. Support for this work was provided by NASA grants NAGW 1919 and NGT-50804.

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52287
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CaltechAUTHORS:20141202-142723632

Related works

Describes
http://adsabs.harvard.edu/full/1997ESASP.382..217C (URL)

Funding

NASA
NAGW-1919
NASA
NGT-50804

Dates

Created
2014-12-03
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Updated
2019-10-03
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Caltech groups
Space Radiation Laboratory
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Space Radiation Laboratory
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1997-40