GRIS: High Resolution Gamma-Ray Spectroscopy of CYG X-1

Details GRIS: High Resolution Gamma-Ray Spectroscopy of CYG X-1 GRIS: High Resolution Gamma-Ray Spectroscopy of CYG X-1

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.2902t&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #29.02; Bulletin of the American Astronomical Society, Vol. 25, p.1336

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gamma-Ray Imaging Spectrometer (GRIS)was flown on a high=20 altitude balloon from Ft Sumner, NM on 24 September 1993. During= =20 a 20 hour flight, GRIS made high-resolution observations of=20 NGC 4151, Cyg X-1, and the Crab Nebula with a cooled germanium=20 spectrometer (about 2 keV FWHM resolution). The heavy active=20 shielding was supplemented by a passive fine collimator, which=20 reduced the normal 18 degree FOV to 6 degrees and produced=20 significantly improved hard x-ray sensitivity. Preliminary analysis= =20 indicates that GRIS was operating normally in-flight, and continuum= =20 emission is clearly detected. Results from our observation of Cyg= X-1,=20 including continuum measurements and a search for gamma-ray lines,= =20 will be presented.

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