Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 16816

Subject
GRB 140909A: Confirmation of the Swift-XRT afterglow
Date
2014-09-12T10:36:45Z (10 years ago)
From
Claudio Pagani at U of Leicester <cp232@star.le.ac.uk>
C. Pagani (U. Leicester) and E. Sonbas (Adiyaman U.) report on behalf of 
the Swift team:

A second epoch of XRT data was collected on the field of the Swift/BAT 
ground detected GRB 140909A (Palmer, GCN Circ. 16808), from 148 ks to 
252 ks after the  Swift/BAT trigger.

The X-ray source reported in GCN Circ. 16811, Pagani et al., at a mean 
count rate of 6.9e-03 ct/sec, is now no longer detected, having faded 
below a 3-sigma upper limit of 2.3 x 10^-3 count s^-1 (0.3-10 keV). We 
therefore confirm that this is the X-ray afterglow of GRB 140909A

This circular is an official product of the Swift-XRT team.
Looking for U.S. government information and services? Visit USA.gov