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 18043

Subject
GRB 150722A: Swift-XRT observations
Date
2015-07-22T12:06:05Z (9 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
S. Campana (INAF-OAB), P.A. Evans (U. Leicester), J.P. Osborne (U.
Leicester), D.N. Burrows (PSU), J.A. Kennea (PSU) and G. Tagliaferri
(INAF-OAB) report on behalf of the Swift-XRT team:

The XRT began observing the field of GRB 150722A at 10:51:48.0 UT,
3234.9 seconds after the BAT trigger. Using promptly downlinked data we
find a fading, uncatalogued X-ray source located at RA, Dec 218.27775,
-35.19644 which is equivalent to:
   RA(J2000)  = 14h 33m 06.66s
   Dec(J2000) = -35d 11' 47.2"
with an uncertainty of 3.6 arcseconds (radius, 90% containment). This
location is 17 arcseconds from the BAT onboard position, within the BAT
error circle. This position may be improved as more data are received;
the latest position is available at http://www.swift.ac.uk/sper. 

A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 5.92
x 10^20 cm^-2 (Willingale et al. 2013).
Looking for U.S. government information and services? Visit USA.gov