NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210610d21h00m39s665911usUT
NOTE: Source region spec. is: 204.28174 14.46528 3"
NOTE: Used archived uvot source position of 204.28174  14.46528  3.00
NOTE: position reference is GCN_Circ_30160
NOTE: A UVOT position was reported in GCN_Circ_30160
NOTE: Possible detection in wh at T+94.2
NOTE: Possible detection in bb at T+562.2
NOTE: Possible detection in vv at T+636.1
WARNING: Did not recognize UBS name.

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

GRB 210610A: Swift/UVOT Upper Limits

Baer (***INSTITUTION***) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210610A
94 s after the BAT trigger (Page et al., GCN Circ. 30160).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 30165)
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            94          244          147         >17.1
u_FC               307          557          246         >20.9
white               94          891          216         >17.3
v                  636         4498          236         >18.0
b                  562          754           39         >17.4
u                  307         5020          370         >21.2
w1                 685         4908          216         >20.4
m2                4503         4703          197         >21.0
w2                4094         4293          197         >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.032 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 210610A: Swift/UVOT Detection

Baer (***INSTITUTION***) and K. L. Page (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210610A
94 s after the BAT trigger (Page et al., GCN Circ. 30160).
A source consistent with the XRT position
(Goad et al. GCN Circ. 30165)
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  13:37:07.59 = 204.28161 (deg.)
    Dec (J2000) = +14:27:55.0  =  14.46527 (deg.)
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).

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               94          244          147         17.19 +/- 0.03
v                  636          656           19         16.78 +/- 0.17
b                  562          582           20         17.47 +/- 0.13
u                  307         5020          370        >21.2
w1                 685         4908          216        >20.4
m2                4503         4703          197        >21.0
w2                4094         4293          197        >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.032 in the direction of the burst
(Schlegel et al. 1998).