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Titolo:
Prompt and afterglow emission from the X-ray-rich GRB 981226 observed withBepposax
Autore:
Frontera, F; Antonelli, LA; Amati, L; Montanari, E; Costa, E; Dal Fiume, D; Giommi, P; Feroci, M; Gennaro, G; Heise, J; Masetti, N; Muller, JM; Nicastro, L; Orlandini, M; Palazzi, E; Pian, E; Piro, L; Soffitta, P; Stornelli, M; int Zand, JJM; Frail, DA; Kulkarni, SR; Vietri, M;
Indirizzi:
Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100 artimento Fis, I-44100 Ferrara, Italy CNR, Ist Tecnol & Studio Radiazioni Extraterr, I-40129 Bologna, Italy CNRBologna Italy I-40129 o Radiazioni Extraterr, I-40129 Bologna, Italy Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy Osservatorio Astron Roma Monte Porzio Catone Italy I-00040 Catone, Italy CNR, Ist Astrofis Spaziale, I-00133 Rome, Italy CNR Rome Italy I-00133CNR, Ist Astrofis Spaziale, I-00133 Rome, Italy BeppoSAX Sci Data Ctr, I-00131 Rome, Italy BeppoSAX Sci Data Ctr Rome Italy I-00131 i Data Ctr, I-00131 Rome, Italy BeppoSAX Operat Control Ctr, I-00131 Rome, Italy BeppoSAX Operat Control Ctr Rome Italy I-00131 Ctr, I-00131 Rome, Italy Space Res Org Netherlands, NL-3584 CA Utrecht, Netherlands Space Res Org Netherlands Utrecht Netherlands NL-3584 CA ht, Netherlands CNR, Ist Fis Cosmica & Appl Informat, I-90146 Palermo, Italy CNR PalermoItaly I-90146 osmica & Appl Informat, I-90146 Palermo, Italy Natl Radio Astron Observ, Socorro, NM 87801 USA Natl Radio Astron Observ Socorro NM USA 87801 serv, Socorro, NM 87801 USA CALTECH, Palomar Observ, Pasadena, CA 91125 USA CALTECH Pasadena CA USA 91125 ECH, Palomar Observ, Pasadena, CA 91125 USA Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy Univ Roma Tre Rome Italy I-00146 , Dipartimento Fis, I-00146 Rome, Italy
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 2, volume: 540, anno: 2000,
parte:, 1
pagine: 697 - 703
SICI:
0004-637X(20000910)540:2<697:PAAEFT>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASTRONOMY SATELLITE; ON-BOARD; BURST;
Keywords:
gamma rays : bursts; gamma rays : observations; shock waves; X-rays : general;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Frontera, F Univ Ferrara, Dipartimento Fis, Via Paradiso 12, I-44100 Ferrara, Italy Univ Ferrara Via Paradiso 12 Ferrara Italy I-44100 ara, Italy
Citazione:
F. Frontera et al., "Prompt and afterglow emission from the X-ray-rich GRB 981226 observed withBepposax", ASTROPHYS J, 540(2), 2000, pp. 697-703

Abstract

We discuss observations of the prompt X- and gamma-ray emission and X-ray afterglow from GRB 981226. This event has the weakest gamma-ray peak flux detected with the BeppoSAX Gamma-Ray Burst Monitor. It shows an isolated X-ray precursor and the highest X-ray to gamma-ray fluence ratio measured thusfar with the BeppoSAX Wide Field Cameras. The event was followed up with the BeppoSAX Narrow Field Instruments, and the X-ray afterglow was detected up to 10 keV. The afterglow flux is observed to rise from a level below thesensitivity of the MECS/LECS telescopes up to a peak flux of (5 +/- 1) x 10(-13) ergs cm(-2) s(-1) in the 2-10 keV energy band. This rise is followedby a decline according to a power law with an index of 1.31(-0.39)(+0.44). We discuss these results in the light of the current GRB models.

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Documento generato il 24/11/17 alle ore 17:41:03