GCN Circular 11749
Subject
GRB 110213B: Swift/UVOT observations
Event
Date
2011-02-18T13:51:47Z (15 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (MSSL-UCL) & R. Margutti, (INAF-OAB) reports on behalf of
the Swift-UVOT team
The Swift/UVOT began settled observations of the field of the MAXI GRB
110213B
~13hrs after the trigger (Negoro et al., GCN Circ. 11716). The optical
afterglow
detected by P60 (Cenko et al, GCN Circ. 11732, 11735) and GROND
(Elliott et al,
GCN Circ. 11743) only lies in the UVOT field of view for 3 images, one
per
filter (white, v and u) obseved at ~3 days after the trigger.
Preliminary magnitudes using the UVOT photometric system (Poole et al.
2008,
MNRAS, 383, 627) for the single exposures at the location of the optical
afterglow are:
Filter T_start(s) T_stop(s) Exp(s) 3sigUL
#####################################################
wh 256170 256432 259 > 20.78
v 256438 256691 249 > 19.23
u 255901 256164 259 > 19.62
#####################################################
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).