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Titolo:
The X-ray afterglow of GRB 980519
Autore:
Nicastro, L; Amati, L; Antonelli, LA; Costa, E; Cusumano, G; Feroci, M; Frontera, F; Palazzi, E; Pian, E; Piro, L;
Indirizzi:
CNR, Ist Fis Cosm Applicaz Informat, I-90146 Palermo, Italy CNR Palermo Italy I-90146 Cosm Applicaz Informat, I-90146 Palermo, Italy CNR, Ist Tecnol & Studio Radiaz Extraterr, I-10129 Turin, Italy CNR Turin Italy I-10129 & Studio Radiaz Extraterr, I-10129 Turin, Italy Osservatorio Astron Roma, I-00040 Monteporzio Catone, RM, Italy Osservatorio Astron Roma Monteporzio Catone RM Italy I-00040 e, RM, Italy CNR, Ist Astrofis Spaziale, I-00131 Rome, Italy CNR Rome Italy I-00131CNR, Ist Astrofis Spaziale, I-00131 Rome, Italy Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100 artimento Fis, I-44100 Ferrara, Italy BezzoSAX Sci Data Ctr, I-00131 Rome, Italy BezzoSAX Sci Data Ctr Rome Italy I-00131 i Data Ctr, I-00131 Rome, Italy
Titolo Testata:
ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
fascicolo: 3, volume: 138, anno: 1999,
pagine: 437 - 438
SICI:
0365-0138(199909)138:3<437:TXAOG9>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Keywords:
gamma-rays : bursts; gamma-rays : observation; X-rays : bursts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
7
Recensione:
Indirizzi per estratti:
Indirizzo: Nicastro, L CNR, Ist Fis Cosm Applicaz Informat, Via U La Malfa 153, I-90146 Palermo, Italy CNR Via U La Malfa 153 Palermo Italy I-90146 6 Palermo, Italy
Citazione:
L. Nicastro et al., "The X-ray afterglow of GRB 980519", ASTR AST SS, 138(3), 1999, pp. 437-438

Abstract

Over a total of 20 gamma-ray bursts localized with arcmin accuracies, GRB 980519 represents the 13th detected by the BeppoSAX Wide Field Cameras (WFCs). An X-ray TOO observation performed by the BeppoSAX Narrow Field Instruments (NFIs), starting about 9.5 hours after the high energy event, revealedX-ray afterglow emission in the 0.1-10 keV energy range. The flux decay was particularly fast with a power-law index of similar or equal to 1.8. Thisis the fastest decay so far measured. Signs of bursting activity are evident. The power-law spectral index of 2.8(-0.5)(+0.6) is quite soft but not unique among GRB afterglows. VRcIc optical emission was detected as soon as 8 hours after the GRB and the power-law flux decay in all these bands were all consistent with delta similar or equal to 2.0. As for the X-ray, this is the fastest of all the 9 optically identified afterglows but GRB 980326. A candidate host galaxy with magnitude R-c = 26 has been reported and variable radio emission detected.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 03:39:33