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GCN Circular 36083

GRB 240414A: Swift detection of a burst
2024-04-14T02:36:27Z (a month ago)
K.L. Page at U Leicester <>

R. Caputo (GSFC), C. Gronwall (PSU), J.D. Gropp (PSU),
A. Y. Lien (U Tampa), M. J. Moss (GSFC), K. L. Page (U Leicester) and
D. M. Palmer (LANL) report on behalf of the Neil Gehrels Swift
Observatory Team:

At 02:20:36 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 240414A (trigger=1221714).  Swift slewed immediately to the burst. 
The BAT on-board calculated location is 
RA, Dec 184.786, +56.727 which is 
   RA(J2000) = 12h 19m 09s
   Dec(J2000) = +56d 43' 37"
with an uncertainty of 3 arcmin (radius, 90% containment, including 
systematic uncertainty).  The BAT light curve showed a complex
structure with a duration of at least 60 sec, with a possible smaller
peak around T+120s (during the XRT observation).  The peak count rate
was ~2600 counts/sec (15-350 keV), at ~2 sec after the trigger. 

The XRT began observing the field at 02:22:19.6 UT, 103.2 seconds after
the BAT trigger. XRT found a bright, uncatalogued X-ray source located
at RA, Dec 184.7855, 56.7381 which is equivalent to:
   RA(J2000)  = 12h 19m 8.52s
   Dec(J2000) = +56d 44' 17.2"
with an uncertainty of 4.9 arcseconds (radius, 90% containment). This
location is 39 arcseconds from the BAT onboard position, within the BAT
error circle. No event data are yet available to determine the column
density using X-ray spectroscopy. 

UVOT data are not available at this time. 

Burst Advocate for this burst is R. Caputo (regina.caputo AT 
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:

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