TITLE:   GCN CIRCULAR
NUMBER:  33731
SUBJECT: GRB 230506C: Swift detection of a burst
DATE:    23/05/06 17:21:56 GMT
FROM:    David Palmer at LANL <palmer@lanl.gov>


A. Tohuvavohu (U Toronto), J. A. Kennea (PSU),
K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU) and
M. A. Williams (PSU) report on behalf of the Neil Gehrels Swift
Observatory Team:

At 17:09:19 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 230506C (trigger=1167288).  Swift did not immediately slew
due to an observing constraint.  The BAT on-board calculated location is 
RA, Dec 134.373, +45.126 which is 
   RA(J2000) = 08h 57m 30s
   Dec(J2000) = +45d 07' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a complex
structure with a duration of about 30 sec.  The peak count rate
was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger. 

Due to an observing constraint, Swift will not slew until T0+55.3
minutes. There will be no XRT or UVOT data until this time. 

Burst Advocate for this burst is A. Tohuvavohu (aaron.tohu AT gmail.com). 
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/)