NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190311d16h34m37s730871usUT
NOTE: Source region spec. is: 212.0653 +53.5008 3"
NOTE: Used archived uvot source position of 212.06530  53.50080  3.00
NOTE: position reference is GCN_Notice
NOTE: A UVOT position was reported in GCN_Notice_Mon_11_Mar_19_15:28:18_UT
NOTE: Possible detection in uu at T+300.6
NOTE: Possible detection in wh at T+88.0

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

GRB 190311A: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190311A
88 s after the BAT trigger (Troja et al., GCN Circ. 23946).
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            88          238          147         >19.3
u_FC               301          550          246         >19.3
white               88         1028          295         >19.7
u                  301          550          246         >19.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 190311A: Swift/UVOT Detection

M. H. Siegel (PSU) and E. Troja (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190311A
88 s after the BAT trigger (Troja et al., GCN Circ. 23946).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  14:08:15.71 = 212.06546 (deg.)
    Dec (J2000) = +53:30:02.9  =  53.50080 (deg.)
with an estimated uncertainty of 0.49 arc sec. (radius, 90% confidence).

Preliminary detections 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               88          238          147         19.59 +/- 0.10
u                  301          550          246         19.85 +/- 0.20

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).