TITLE:   GCN CIRCULAR
NUMBER:  16263
SUBJECT: GRB 140512A: Continued UVOT Observations
DATE:    14/05/13 20:08:32 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel@swift.psu.edu>

B. Porterfield (PSU) and C. Pagani (U Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140512A
106 s after the BAT trigger (Pagani et al., GCN Circ. 16249).
We can confirm the detection of a fading source  with the
UVOT position
  RA(J2000)  =	19:17:28.78 = 289.36991
  DEC(J2000) = -15:05:39.2  = -15.09423

Preliminary detections and 3-sigma upper limits using the UVOT photometric
system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the
finding chart (FC) exposures and subsequent exposures are:

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

white (fc)         106          256          293       14.91 +/- 0.07
white              106         1022          186       16.99 +/- 0.07
white             1175         6197          412       19.07 +/- 0.08
v                   88         1072           68       15.97 +/- 0.09
v                 4973         6608          393       18.68 +/- 0.15
b                  574         1344           76       16.84 +/- 0.08
b                 5793         5992          196       19.56 +/- 0.19
u (fc)             319          568          491       15.37 +/- 0.07
u                 5587         7102          275       19.08 +/- 0.18
uvw1               697         1295           58       17.52 +/- 0.19
uvw1              5383         7018          393       20.10 +/- 0.34
uvm2               672         1270           77      >18.71
uvm2              5177         6812          393      >20.17
uvw2               624         1220           77      >19.05
uvw2              4769         6403          393      >20.47

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.162 in the direction of the burst
(Schlegel et al. 1998).