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28 March 2024
 
  » arxiv » astro-ph/0012398

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Preliminary Results from the 1999 Balloon Flight of the Liquid Xenon Gamma-Ray Imaging Telescope (LXeGRIT)
E. Aprile ; U.G. Oberlack ; A. Curioni ; V. Egorov ; K.-L. Giboni ; S. Ventura ; T. Doke ; J. Kikuchi ; K. Takizawa ; E.L. Chupp ; P.P. Dunphy ;
Date 19 Dec 2000
Subject astro-ph
AffiliationColumbia University); S. Ventura (Padua University, Italy); T. Doke, J. Kikuchi, K. Takizawa (Waseda University, Japan); E.L. Chupp, P.P. Dunphy (University of New Hampshire
AbstractLXeGRIT is a balloon-borne Compton telescope employing a large volume liquid xenon time projection chamber (LXeTPC) as the central gamma-ray detector. It is designed to image gamma rays in the energy range of 200 keV to 20 MeV, with an angular resolution of about 3 degrees (1 sigma) at 2 MeV, within a field-of-view (FOV) of about 1 sr. The detector’s energy and three-dimensional spatial resolution as measured during pre-flight calibration experiments, are $Delta E_mathrm{lxe}/E=8.8% : sqrt{1MeV /E}$ and < 1mm RMS, respectively. The detection efficiency for Compton events varies between 1.5% and 4% depending on energy and event selection. We describe the instrument as flown on May 7, 1999 and review its overall performance at balloon altitude. The launch occurred at 13:26:54 UT from Ft. Sumner, New Mexico and the flight was terminated about 9 hours later. The Crab was in the instrument FOV for a few hours. Analysis of these data is in progress.
Source arXiv, astro-ph/0012398
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