2002A&A...395L..41W


Query : 2002A&A...395L..41W

2002A&A...395L..41W - Astronomy and Astrophysics, volume 395, L41-45 (2002/11-4)

The X-ray afterglow of GRB 020322.

WATSON D., REEVES J.N., OSBORNE J.P., TEDDS J.A., O'BRIEN P.T., TOMAS L. and EHLE M.

Abstract (from CDS):

The spectrum of the afterglow of GRB 020322 is the highest-quality X-ray spectrum of a GRB afterglow available to date. It was detected by XMM-Newton in an observation starting fifteen hours after the GRB with a mean 0.2-10.0keV observed flux of 3.5±0.2x10–13erg/cm2/s, making it the brightest X-ray afterglow observed so far with XMM-Newton. The source faded; its lightcurve was well fit by a power-law with a decay index of 1.26±0.23. The spectrum is adequately fit with a power-law absorbed with neutral or ionised gas significantly in excess of the foreground Galactic column, at redshift 1.8–1.1+1.0 or with low metal abundances. No spectral line or edge features are detected at high significance, in particular, a thermal emission model fits the data poorly, the upper limit on its contribution to the spectrum is 3.7x10–14erg/cm2/s, or ∼10% of the total flux. No spectral variability is observed.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - X-rays: general

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 GRB 010220 gB 02 36 59.0 +61 46 00           ~ 40 0
2 GRB 001025 gB 08 36.6 -13 04           ~ 47 1
3 GRB 011211 gB 11 15 16 -21 56.0           ~ 300 0
4 GRB 020322 gB 18 00 48.5 +81 06 13           ~ 44 0

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