NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 241031d03h18m33s589589usUT
NOTE: Source region spec. is: 50.79275 34.44722 3"
NOTE: Used archived opt source position of  50.79275  34.44722  3.00
NOTE: position reference is GCN_Circulars-37985
NOTE: Possible detection in wh at T+161.7

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

GRB 241030B: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and N. J. Klingler (GSFC/UMBC/CRESSTII)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 241030B
162 s after the BAT trigger (Klingler et al., GCN Circ. 37981).
No optical afterglow consistent with the optical position
*** POSITION REFERENCE is GCN_Circulars-37985 ***
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           162          311          147         >20.2
white              162          917          241         >20.8
v                  395         4817          255         >19.4
b                  494          857           58         >19.3
u                  469         5380          203         >20.2
w1                 444         5228          255         >21.1
m2                4822         5021          197         >19.7
w2                 371         4612          255         >19.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.204 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 241030B: Swift/UVOT Detection

A. A. Breeveld (UCL-MSSL) and N. J. Klingler (GSFC/UMBC/CRESSTII)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 241030B
162 s after the BAT trigger (Klingler et al., GCN Circ. 37981).
A source consistent with the optical position
*** POSITION REFERENCE is GCN_Circulars-37985 ***
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              162          538          167         21.00 +/- 0.30
v                  395         4817          255        >19.4
b                  494          857           58        >19.3
u                  469         5380          203        >20.2
w1                 444         5228          255        >21.1
m2                4822         5021          197        >19.7
w2                 371         4612          255        >19.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.204 in the direction of the burst
(Schlegel et al. 1998).