[vsnet-grb-info 14520] GRB 140213A: Swift/UVOT Observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15834
SUBJECT: GRB 140213A: Swift/UVOT Observations
DATE:    14/02/14 21:45:33 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

M. H. Siegel (PSU) and S. T. Holland (STScI) report on behalf of the
Swift/UVOT team:

The Swift/UVOT has continued to observe GRB 140213A (Holland
et al., GCN 15825).  We find that the optical afterglow is slowly fading
but still detected in all UVOT filters as of 68 ks after the BAT trigger.

The preliminary UVOT position is:
   RA  (J2000) =  07:00:37.13 = 105.15472 (deg.)
   Dec (J2000) = -73:08:13.5  = -73.13707 (deg.)
with an estimated uncertainty of 0.51 arc sec. (radius, 90% confidence).

Preliminary detections using the UVOT photometric system (Breeveld et  
al. 2011, AIP Conf. Proc. 1358, 373) are:

Filter      T_start(s)   T_stop(s)    Exp(s)        Mag
white (fc)   3428         3578         147       17.70+-0.04
white        4610         4809         196       18.08+-0.05
v            3584         3784         196       18.03+-0.12
v            9217        10124         885       19.06+-0.13
v           27349        28053         685       19.73+-0.35
b            4405         4605         196       18.40+-0.09
b           61868        62291         412       19.52+-0.13
u (fc)       4200         4399         196       17.40+-0.06
u           21642        22285         625       18.81+-0.11
u           60956        61863         885       18.91+-0.08
uvw1         3995         4194         196       17.65+-0.10
uvw1        14948        21635        1242       18.79+-0.08
uvm2         3789         3989         196       17.77+-0.14
uvm2        10129        10771         632       18.52+-0.12
uvm2        33470        49991        1348       19.47+-0.14
uvm2        66689        67589         885       19.26+-0.15
uvw2         4816         5012         193       18.46+-0.17
uvw2        26443        27343         885       20.06+-0.21

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.15 in the direction of the burst
(Schlegel et al. 1998).