Previous abstract Next abstract
Session 101 - X-rays and X-ray Bursts.
Display session, Thursday, January 16
The Gamma Ray Arcminute Telescope Imaging System (GRATIS) was flown from Alice Springs, Australia on October 17-18, 1995. The experiment consists of 36 individual one-dimensional coded-aperture telescopes with a field of view of 40 arcminutes in the imaging direction. Our highly collimated experiment is a sensitive probe of background fluctuations as a function of the attitude of the payload, as well as small-scale structure in the diffuse gamma-ray background. The long time at float allowed sampling of a wide range of altitudes and conditions. We discuss the current status of our background analysis, including the effect of payload attitude on the count rate. We delineate a model which describes the change in spectrum and countrate in good agreement with the observations.
Program listing for Thursday