GCN Circular 15275

Subject

GRB 130929A: Swift/UVOT Upper Limits

Event

Date

2013-09-30T18:07:07Z (12 years ago)

From

Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>

F. E. Marshall (NASA/GSFC) reports on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 130929A
280 s after the BAT trigger (Marshall et al., GCN Circ. 15269Loading...
 
 ).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 15271Loading...
 
 ) is detected in the initial UVOT exposures.
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           280          430          147         >21.0
white              280         1008          334         >21.4
v                  586         4628          236         >19.7
b                  512          705           39         >19.0
u                  487        10592          709         >20.6
w1                 462         6710          255         >19.6
m2                 437         6505          308         >19.7
w2                 562         4423          236         >19.7

The magnitudes in the table are not corrected for the 
large Galactic extinction in the direction of the burst
(Schlegel et al. 1998).