NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 240730d14h44m25s921604usUT
NOTE: Source region spec. is: 37.83821 59.02875 4"
NOTE: Used archived XRT position of  37.83821  59.02875  4.00
NOTE: position reference is GCN_Circulars-36977
NOTE: Possible detection in vv at T+5289.7
NOTE: Possible detection in wh at T+133.3
NOTE: Possible detection in bb at T+4674.0
NOTE: Possible detection in uu at T+1130.2 sum

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

GRB 240730A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and S. B. Cenko (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 240730A
133 s after the BAT trigger (Cenko et al., GCN Circ. 36976).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-36977 ***
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           133          283          147         >19.3
u_FC               291          541          246         >19.2
white              133         5079          540         >19.4
v                 1057         5447          194         >18.1
b                  547         4874          236         >19.2
u                  291         1312          273         >19.1
w1                1106         1299           39         >18.0
m2                1081         1274           39         >18.1
w2                1032         5285          236         >20.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.146 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 240730A: Swift/UVOT Detection

***UBS*** (***INSTITUTION***) and S. B. Cenko (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 240730A
133 s after the BAT trigger (Cenko et al., GCN Circ. 36976).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-36977 ***
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              133          283          147         19.62 +/- 0.13
v                 5290         5447          155         18.51 +/- 0.22
b                 4674         4874          197         19.64 +/- 0.21
u                  291         1312          273         19.78 +/- 0.31
w1                1106         1299           39        >18.0
m2                1081         1274           39        >18.1
w2                1032         5285          236        >20.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.146 in the direction of the burst
(Schlegel et al. 1998).