[vsnet-grb-info 2984] GRB 060223B: Swift detection of a bright burst

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4821
SUBJECT: GRB 060223B: Swift detection of a bright burst
DATE:    06/02/23 20:01:52 GMT
FROM:    Jay R. Cummings at NASA/GSFC/Swift  <jayc at milkyway.gsfc.nasa.gov>

J. R. Cummings (NASA/ORAU), S. D. Barthelmy (GSFC), D. N. Burrows
(PSU), M. M. Chester (PSU), A. Cucchiara (PSU), J. A. Kennea (PSU),
H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer
(LANL), M. Perri (ASDC), L. Vetere (ASDC) and H. Z. Ziaeepour
(UCL-MSSL) report on behalf of the Swift Team:

At 19:41:04 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 060223 (trigger=192152).  Swift did not slew due to a
moon constraint.  The BAT on-board calculated location is 
RA,Dec 254.241, -30.807 {16h 56m 58s, -30d 48' 24"} (J2000)
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a multi-peaked
structure with a duration of about 15 sec.  The peak count rate
was ~6000 counts/sec (15-350 keV), at ~3 sec after the trigger. 

We anticipate that the narrow-field instruments will be able to
observe the burst at about T+18 hours.