[vsnet-grb-info 27490] Trigger 1035744: Swift detection of Sco X-1 due to Star Tracker loss of lock
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Fri Mar 5 10:37:05 JST 2021
TITLE: GCN CIRCULAR
NUMBER: 29593
SUBJECT: Trigger 1035744: Swift detection of Sco X-1 due to Star Tracker loss of lock
DATE: 21/03/05 01:36:05 GMT
FROM: Scott Barthelmy at NASA/GSFC <scott at milkyway.gsfc.nasa.gov>
S. D. Barthelmy (GSFC), V. D'Elia (SSDC) and N. J. Klingler (PSU)
report on behalf of the Neil Gehrels Swift Observatory Team:
At 01:09:41 UT, the Swift Burst Alert Telescope (BAT) was triggered on a noise
event (trigger=1035744). Swift did not slew due to Star Tracker
loss of lock problems. The BAT on-board calculated location is
RA, Dec 244.831, -15.786, which is
RA(J2000) = 16h 19m 19s
Dec(J2000) = -15d 47' 08"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows no signal but this is typical
for an image trigger and Star Tracker problems.
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