NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210612d23h05m01s010106usUT
NOTE: Source region spec. is: 236.7907 -47.6693 4"
NOTE: Used archived XRT position of 236.79070 -47.66930  4.00
NOTE: position reference is GCN_Notice
NOTE: Possible detection in uu at T+1578.9
NOTE: Possible detection in wh at T+1803.4 sum
NOTE: Possible detection in bb at T+1604.4
NOTE: Possible detection in w1 at T+2248.4 sum
NOTE: Possible detection in vv at T+1853.1

=========== Draft Upper Limit Circular ========

GRB 210612: Swift/UVOT Upper Limits

S. J. LaPorte (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210612
1348 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
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          1348         1498          147         >19.6
white             1348         2516          264         >19.7
v                 1505         2392          117         >17.1
b                 1604         2491          117         >17.9
u                 1579         2466          117         >17.5
w1                1554         2441          117         >18.0
m2                1530         2416          117         >18.3
w2                1655         2367           97         >18.7

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


=========== Draft Detection Circular ========

GRB 210612: Swift/UVOT Detection

S. J. LaPorte (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210612
1348 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
is detected in the initial UVOT exposures.

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

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

white             1348         2516          264         20.34 +/- 0.25
v                 1505         2046           78         17.45 +/- 0.18
b                 1604         1972           58         18.20 +/- 0.16
u                 1579         1947           58         18.00 +/- 0.19
w1                1554         2268           97         18.63 +/- 0.32
m2                1530         2416          117        >18.3
w2                1655         2367           97        >18.7

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