GCN Circular 43479

M. Ferro (INAF-OAB), R. Gupta (NASA GSFC), A. Y. Lien (U Tampa),
K. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU)
report on behalf of the Neil Gehrels Swift Observatory Team:

At 18:00:26 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 260120B (trigger=1442454).  Swift slewed immediately to the burst.
The BAT on-board calculated location is 
RA, Dec 284.666, +61.912 which is 
   RA(J2000) = 18h 58m 40s
   Dec(J2000) = +61d 54' 42"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a single-peaked
structure with a duration of about 10 sec.  The peak count rate
was ~1700 counts/sec (15-350 keV), at ~1 sec after the trigger.

The XRT began observing the field at 18:02:51.6 UT, 145.5 seconds after
the BAT trigger. No source was detected in the 2.5-s promptly available
image. We are waiting for the full dataset to detect and localise the
XRT counterpart.

No UVOT data are available at this time.

Burst Advocate for this burst is M. Ferro (matteo.ferro AT inaf.it).
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/)