GCN Circular 13569

Subject

GRB 120803A: Swift-XRT Observations

Event

GRB 120803A

Date

2012-08-03T14:11:31Z (14 years ago)

From

Phil Evans at U of Leicester <pae9@leicester.ac.uk>

P.A. Evans, K.L. Page (U. Leicester) and J.L. Racusin (NASA/GSFC) report
on behalf of the Swift-XRT team:

We have analysed 2.5 ks of Photon Counting mode XRT data on GRB 120803A
from 155 s to 5.8 ks after the BAT trigger (Racusin et al., GCN Circ
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 ). We find a single, uncatalogued X-ray source at RA,Dec =
269.5140, -6.7628 which is equivalent to:

   RA(J2000)  = 17h  58m 03.36s
   Dec(J2000) = -06d 45' 46.2"

with an uncertainty of 4 arc sec (radius, 90% containment). This
source is  4.2 arcmin from the original BAT position (GCN Circ 13565Loading...
 
 )
but only 2 arcmin from the refined BAT position (Ukwatta et al., GCN
Circ 13568Loading...
 
 ), inside the refined BAT error circle.

The spectrum of this object can be modelled by an absorbed power-law
with a photon index of 1.1 (+0.9, -0.5). The absorption is consistent
with the Galactic value of 2.3e21 cm^-2 (Kalberla et al. 2005).

The source has a mean count-rate of 0.014 (+/- 0.0029) ct/sec, we cannot
tell at this time whether the source is fading. Further observations are
planned.

This circular is an official product of the Swift-XRT team.