Gamma-Ray Burst Arrival Time Localizations: Simultaneous Observations by {ital Pioneer} {ital V}{ital enus} {ital Orbiter}, {ital Compton} {ital Gamma}-{ital Ray} {ital Observatory}, and {ital Ulysses}
- Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721 (United States)
- Space Sciences Laboratory, University of California, Berkeley, Berkeley, CA 94720-7450 (United States)
- Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
- University of Alabama in Huntsville, Huntsville, AL 35899 (United States)
- USRA, at NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States)
- NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States)
- NASA/Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
- CESR, F-31029 Toulouse Cedex (France)
Between the {ital Compton} {ital Gamma} {ital Ray} {ital Observatory} ({ital CGRO}) launch in 1991 April and the {ital Pioneer} {ital V}{ital enus} {ital Orbiter} ({ital PVO}) demise in 1992 October, concurrent coverage by {ital CGRO}, {ital PVO}, and {ital Ulysses} was obtained for several hundred gamma-ray bursts (GRBs). Although most of these were below the {ital PVO} and {ital Ulysses} thresholds, 37 were positively detected by all three spacecraft, with data quality adequate for quantitative localization analysis. All were localized independently to {approximately}2{degree} accuracy by the {ital CGRO} Burst and Transient Source Experiment (BATSE), and three were also localized by COMPTEL. We computed arrival-time error boxes, whose larger dimensions range from about 2{prime} to several degrees and whose smaller dimensions are in the arcminute range. Twelve have areas less than 10 arcmin{sup 2}, and only four have areas greater than 1 deg{sup 2}. The area of the smallest box is 0.44 arcmin{sup 2}. We find that the overall BATSE localization accuracy for these events is consistent with the most recent stated uncertainties. This work indicates that the {ital ROSAT} soft X-ray source found within a preliminary IPN error box for GB920501 (Trig 1576) (Hurley et al.) is less likely to be the GRB counterpart than previously reported. {copyright} {ital {copyright} 1998.} {ital The American Astronomical Society}
- OSTI ID:
- 677215
- Journal Information:
- Astrophysical Journal, Supplement Series, Vol. 118, Issue 2; Other Information: PBD: Oct 1998
- Country of Publication:
- United States
- Language:
- English
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