Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27

Details Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27 Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27

2004-07-08

arxiv.org/abs/astro-ph/0407166v2

Astron.Astrophys. 426 (2004) 415-423

Astronomy and Astrophysics

Astrophysics

10 pages, 8 figures, accepted for pubblication in Astronomy & Astrophysics, main journal

Scientific paper

10.1051/0004-6361:20047146

We report on the X-ray observations of the X-ray flash (XRF) which occurred on 2002 April 27, three days before BeppoSAX was switched off. The event was detected with the BeppoSAX Wide Field Cameras but not with the Gamma ray Burst Monitor. A follow-up observation with the BeppoSAX Narrow Field Instruments was soon performed and a candidate afterglow source was discovered. We present the results obtained. We also include the results obtained from the observations of the XRF field with the Chandra X-ray satellite. The spectral analysis of the prompt emission shows that the peak energy of the EF(E) spectrum is lower than 5.5 keV, with negligible spectral evolution. The X-ray afterglow spectrum is consistent with a power law model with photon index of about 2, while the 2-10 keV flux fades as a power law with a decay index -1.33. Both these indices are typical of GRBs. A very marginal excess around 4.5-5 keV is found in the afterglow spectrum measured by BeppoSAX . As for many GRBs, the extrapolation of the 2-10 keV fading law back to the time of the prompt emission is consistent with the X-ray flux measured during the second part of the event. We estimate a possible range of values of the redshift and discuss our results in the light of current models of XRFs.

Affiliated with

Also associated with

No associations

Rating

Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prompt and afterglow X-ray emission from the X-Ray Flash of 2002 April 27 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-221650