[AAVSO-HEN] GRB 081211B: Further Swift-XRT analysis

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  8683
SUBJECT: GRB 081211B: Further Swift-XRT analysis
DATE:    08/12/19 16:21:47 GMT
FROM:    Kim Page at U.of Leicester  <kpa at star.le.ac.uk>

K.L. Page, J.P. Osborne (U. Leicester) and S.T. Holland (CRESST/USRA/GSFC) 
report on behalf of the Swift-XRT team:

The possible BAT Slew Survey burst GRB 081211B has been observed again by 
Swift, 8 days after it was first located. The source mentioned by Page et 
al. in GCN Circ. 8666 is not detected in 2.3 ks of XRT data, with an upper 
limit of 4.3x10^-3 count s^-1 (equivalent to a 0.3-10 keV observed flux of 
~1.6x10^-13 erg cm^-2 s^-1). The decay slope is 1.6 +0.9/-0.6, 
incorporating the limit placed by this non-detection. We therefore confirm 
that the source has faded.

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