GCN Circular 15834

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
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 ).  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).