X-ray Afterglow Detection of the Short Gamma-ray
نویسندگان
چکیده
GRB 991014 is one of the shortest gamma-ray bursts detected so far with the Wide Field Cameras aboard BeppoSAX, both in γ-rays and X-rays. The duration is 9.6 s in 228 keV and 3.2 s in 40 to 700 keV (as measured between the times when 5 and 95% of the burst photons have been accumulated). We refine the InterPlanetary Network annulus of the burst, present the detection of the X-ray afterglow of GRB 991014 within this refined annulus, and discuss X-ray and γ-ray observations of the prompt and afterglow emission. Except for the briefness of the prompt event, no other unusual aspects were found in the prompt and afterglow observations as compared to such measurements in previous gamma-ray bursts. Subject headings: Gamma-rays: bursts – X-rays: general Space Research Organization Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, the Netherlands email [email protected] Istituto di Tecnologie e Studio delle Radiazioni Extraterrestri (CNR), Via Gobetti 101, 40129 Bologna, Italy Osservatorio Astronomico di Roma, Via Frascati 33, 00040 Monteporzio Catone, Italy BeppoSAX Science Data Center, Via Corcolle 19, 00131 Rome, Italy University of California, Space Sciences Laboratory, Berkeley, CA 94720-7450, U.S.A. BeppoSAX Scientific Operation Center, Via Corcolle 19, 00131 Rome, Italy Istituto di Astrofisica Spaziale (CNR), 00133 Rome, Italy Dipartimento Fisica, Universitá di Ferrara, Via Paradiso 12, 44100 Ferrara, Italy Astronomical Institute, Utrecht University, P.O. Box 80 000, 3504 TA Utrecht, the Netherlands Istituto Fisica Cosmica e Applicazioni all’Informatica (CNR), Via Ugo La Malfa 153, 90146 Palermo, Italy Istituto Fisica Cosmica e Tecnologie Relative (CNR), Via Bassini 15, 20133 Milan, Italy Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, U.S.A.
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