SIMBAD references

2000ApJ...540..697F - Astrophys. J., 540, 697-703 (2000/September-2)

Prompt and afterglow emission from the X-Ray-rich GRB 981226 observed with BeppoSAX.

FRONTERA F., ANTONELLI L.A., AMATI L., MONTANARI E., COSTA E., DAL FIUME D., GIOMMI P., FEROCI M., GENNARO G., HEISE J., MASETTI N., MULLER J.M., NICASTRO L., ORLANDINI M., PALAZZI E., PIAN E., PIRO L., SOFFITTA P., STORNELLI M., IN'T ZAND J.J.M., FRAIL D.A., KULKARNI S.R. and VIETRI M.

Abstract (from CDS):

We discuss observations of the prompt X- and γ-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 thus far 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 the sensitivity of the MECS/LECS telescopes up to a peak flux of (5±1)x10–13 ergs.cm–2.s–1 in the 2-10 keV energy band. This rise is followed by a decline according to a power law with an index of 1.31+0.44–0.39. We discuss these results in the light of the current GRB models.

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Journal keyword(s): Gamma Rays: Bursts - Gamma Rays: Observations - Shock Waves - X-Rays: General

Simbad objects: 6

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