GCN Circular 32932

GRB 221110A: Swift/UVOT Detection and Corrected UVOT Position

S. J. LaPorte (PSU) and M. Williams (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 221110A
83 s after the BAT trigger (Williams et al., GCN Circ. 32925
Not found
 
 
).
A fading source is detected at
RA (J2000) = 01:56:23.72 = 29.09882
Dec (J2000): = -27:17:45.09 = -27.29586
which is consistent with the XRT position (Evans et al. GCN Circ. 32929
Not found
 
 
).

The UVOT position reported in the initial detection circular
(Williams et al., GCN Circ. 32925
Not found
 
 
)
was incorrect, and differs from the updated position presented here by 8.45
arcsec.
We apologize for any inconvenience this discrepancy may cause.

Preliminary detections and 3-sigma upper limits using the UVOT photometric
system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures
are:

Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

b                     3773          3973          196        >19.91
m2                  4593          4793          196        >19.35
u                       326            439          110        >19.33
v                      4357          4557          197        >19.5
w1                   4798          4998          196        >19.48
w2                   4184          4383          196         >19.55
white_FC            114            264          147          18.68+-0.08
white                3978          4178          196         >20.66

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.013 in the direction of the burst
(Schlegel et al. 1998).