GCN Circular 12630

Subject

GRB 111205A: Swift XRT Observations

Event

Date

2011-12-08T19:40:46Z (14 years ago)

From

Erik Hoversten at Swift/Penn State <hoversten@astro.psu.edu>

C. A. Wolf (PSU) and E. A. Hoversten (PSU) report on behalf of the  
Swift team:

We have analysed 5.0 ks of XRT data for the IPN-detected burst: GRB  
111205A
(Hurley et al.  GCN Circ. 12626Loading...
 
 ), from 198.4 ks to 210.7 ks after the   
IPN trigger.
The data are entirely in Photon Counting (PC) mode. The XRT field-of- 
view does
not cover the entire IPN error region. However, an uncataloged X-ray  
source is
detected within the observed XRT field which is potentially the  
afterglow of
GRB 111205A. The refined XRT position is RA, Dec = 134.6793, -31.94327
which is equivalent to:

RA (J2000): 08 58 43.03
Dec(J2000): -31 56 35.8

with an uncertainty of 4.3 arcsec (radius, 90% confidence). This  
position is inside
the IPN error box. We cannot determine at the present time whether the  
source is
fading.  A follow-up Swift observation is planned in several days to  
confirm fading
of the source.  The XRT position is outside of the UVOT field of  
view.  However,
archival DSS imaging reveals a faint optical source within the XRT  
error circle.

The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00020189.