[vsnet-grb-info 18128] GRB 160624A: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19576
SUBJECT: GRB 160624A: Swift/UVOT Upper Limits
DATE:    16/06/25 16:26:56 GMT
FROM:    Massimiliano de Pasquale at IASF-Palermo  <m.depasquale at ucl.ac.uk>

M. De Pasquale (UCL-MSSL) and A. D'Ai (INAF-IASFPA)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 160624A
77 s after the BAT trigger (D'Ai et al., GCN Circ. 19560).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 19566) is detected in the initial
and summed UVOT exposures, nor at the position of the SDSS
galaxy mentioned by Cucchiara et al. (GCN Circ. 19565).
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:

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

white_FC            77          227          147         >20.8
u_FC               289          527          234         >20.0
white               77         6288          541         >21.5
v                 5060         6657          352         >19.5
b                 4445         6082          393         >20.7
u                  289        12622         1073         >20.7
w1                5471        11954         1082         >20.8
m2                5266        11048         1082         >20.7
w2                4855         6494          393         >20.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).

-- 

Dr. Massimiliano De Pasquale
Research associate - Swift UVOT scientist
Mullard Space Science Laboratory, University College London