NOTE: uvot_fluxes_wget.pl vrs. 2018-01-16 fem at 180410d12h13m06s774713usUT
NOTE: Source region spec. is: 95.95717 12.81142 4"
NOTE: Used archived XRT position of  95.95717  12.81142  4.00
NOTE: position reference is GCN_Circulars-22622
NOTE: Possible detection in wh at T+870.0
NOTE: Possible detection in vv at T+1401.0 sum

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

GRB 180410A: Swift/UVOT Upper Limits

F. E. Marshall (NASA/GSFC) and J. D. Gropp (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180410A
179 s after the BAT trigger (Gropp et al., GCN Circ. 22620).
No optical afterglow consistent with the XRT position
(Evans et al. GCN Circ. 22622)
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           179          329          147         >19.8
u_FC               338          587          246         >19.5
white              179         2068          450         >19.9
v                  669         1943          156         >18.0
b                  594         2043          156         >19.7
u                  338         2017          382         >19.8
w1                 718         1993          136         >19.2
m2                 693         1968          136         >19.7
w2                 644         2093          175         >19.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.92 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 180410A: Swift/UVOT Detection

F. E. Marshall (NASA/GSFC) and J. D. Gropp (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 180410A
179 s after the BAT trigger (Gropp et al., GCN Circ. 22620).
A source consistent with the XRT position
(Evans et al. GCN Circ. 22622)
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              179         1195          353         20.31 +/- 0.20
v                  669         1943          156         18.75 +/- 0.31
b                  594         2043          156        >19.7
u                  338         2017          382        >19.8
w1                 718         1993          136        >19.2
m2                 693         1968          136        >19.7
w2                 644         2093          175        >19.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.92 in the direction of the burst
(Schlegel et al. 1998).