GCN Circular 8319

Subject

GRB 081003A: Swift-XRT Team position and analysis

Event

Date

2008-10-03T23:31:33Z (17 years ago)

From

Kim Page at U.of Leicester <kpa@star.le.ac.uk>

K.L. Page, A.P. Beardmore (U. Leicester) and H.A. Krimm (CRESST/GSFC/USRA) 
report on behalf of the Swift-XRT team:

Swift began observing the field of the INTEGRAL GRB 081003A (Mereghetti et 
al., GCN Circ. 8314Loading...
 
 ) 7.6 ks after the trigger. In 1.8 ks of Photon 
Counting mode data, we detect a single source within the INTEGRAL error 
circle at a position of RA, Dec = 262.39082, 16.57103, which is equivalent 
to

RA(J2000):   17 29 33.80
Dec(J2000): +16 34 15.70

with an uncertainty of 3.9 arcsec (radius, 90% containment). The source 
has a count rate of ~0.026 during this observation.

The spectrum of the source can be fitted by an absorbed power-law, with 
Gamma = 3.6 +1.6/-1.2 and NH = (7 +6/-4)x10^21 cm^-2, compared to the 
Galctic value of 6.67x10^20 cm^-2. It is not possible to determine whether 
this source is fading given the current statistics.

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