GCN Circular 6157
Subject
GRB070227: possible X-ray afterglow detection
Event
Date
2007-02-28T19:17:26Z (19 years ago)
From
Claudio Pagani at PSU/Swift-XRT <pagani@astro.psu.edu>
C. Pagani, D. Grupe, D.N. Burrows (PSU) report on behalf of the Swift/XRT
Team:
The Swift BAT detected GRB 070227 at 22:21:59 UT (GCN 6156). The Swift
observatory did not slew promptly because a planned slew terminated the
trigger prematurely. The burst was found later in ground analysis.
The XRT began taking data at 2007-02-28 13:51:31 UT, approximately 15 hours
and 30 minutes after the trigger.
In a preliminary data analysis of the first 2.6ks of PC data we detect an
uncataloged X-ray source located at RA, Dec 120.5808 -46.3135 which is
RA(J2000) = 08h 02m 19.4s
Dec(J2000) = -46d 18' 48.7"
We estimate an uncertainty of 8 arcseconds radius (90% containment).
This position is 48 arcseconds from the BAT position (GCN 6156).
The source count rate is approximately 0.005 counts/s.
Observations are still underway and further ground analysis will be
performed to determine if this X-ray source is fading.
This circular is an official product of the Swift-XRT team.