# uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220110d03h00m35s296496usUT
# /Home/eud/uvot_tdrss/perl/uvot_fluxes_wget.pl -seq=00021480001 -use_uvot -rebin -plot_mag -sens_corr -search_src_reg -wrk_dir=/data/uvot/swift_data/home/uvot_lc -web -useprev -zp_2011 -gamma=1.0 -use_filter_wtd=white v b u
# Current directory: /data/uvot/swift_data/home/uvot_lc
# ========= GRB220107 ===================
Could not find/read custom source region custom_021480_src.reg
Used archived BAT position of 216.50000 20.00000
Reference: GCN_Notice_Sun_09_Jan_22_17:12:36_UT
The position is (14:26:00.00, +20:00:00.0)
Using source region:
# Region file format: DS9 version 3.0
# uvot_fluxes.pl bat
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(216.500,+20.000,3") # color=red dash=0
Source region spec. is: 216.500 +20.000 3"
Region file centered at (216.500,+20.000), which is (14:26:00.00, +20:00:00.0)
Could not find/read custom background region custom_021480_bkg.reg
Made source region file with 5" aper with name uvot_flux_src5.reg
Coincidence losses are calculated using a 5" aperture.
Exposure times (t_exp) have NOT been corrected for coinc. loss, but rates and mags have been.
The no. of background pixels has been corrected by the ratio of coincidence loss corrections in the source and background regions.
The errors have been adjusted to account for the binomial distribution of counts at large rates.
A table entry starting with # is an exposure with no aspect solution.
A table entry starting with ! has no pixels in either source or background region.
A table entry starting with % is unreliable because it is not well inside the image.
Upper limits in tables give the 0.9987 confidence limit using Bayesian analysis for detection taking the observed counts into account.
Upper limits in plots give the 0.9772 confidence limit using Bayesian analysis.
Weighted rates in tables (wtd_rate) combine rates from different exposures weighted by the expected source rate divided by the background rate
The source is assumed to produce the same magnitude in all filters.
The source is assumed to decay as t**(-1.0), and the rate is normalized so that the white filter produces 1 cps at 1000 sec.
The Rebinned Data for All_files combine rates from different exposures weighted by the expected rate divided by the observed sigma squared.
A plot of these data is stored in uvot_fluxes_wtd_date.ps and .gif.
A zero point of 20.29 is adopted for weighting rates.
*** Since no accurate position is available, set rates to 0. and compute ULs based on expected background in source aperture.
Because there are many possible positions for a source, the confidence levels should be increased for upper limits.
Using the ratio of the BAT region and the aperture of 112896.0,
3 sigma should become about 5.7 sigma and 2 sigma should become about 5.2 sigma.
Accordingly confidence limits in the tables have been adjusted from 0.9987 to 0.99999999.
No adjustment has been made for the confidence limits for the rebinned data or the plots.
Subtract UTCF of -28.35794 from uncorrected trigger time of 663274893.52 in BAT summary file
# ============ Reading file sw00021480001uuu_sk.img ================
Long-term sensitivity correction to zero point is -0.200 at 663441300
The processing date in extension 0 is: 2022-01-10T02:49:29
The trigger time is: 663274921.87794. The reference is BAT GRB summary file
Using zero point of 18.140 for filter U
Use aperture correction of 1.100 based on aperture of 3.00
Calculate distance from target to edge of image.
Ext Dist.(") RA_cent DEC_cent width PA
1 172.4 216.40466 20.17232 0.286 106.0
2 129.1 216.41752 20.16743 0.286 106.0
3 64.9 216.44341 20.16659 0.286 106.0
4 132.3 216.41196 20.16342 0.286 106.0
Using background region based on sources found in extension 3:
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(216.500,+20.000,25")
fk5;-circle(216.500,+20.000,12.5")
Ext Exposure t-trig coinc t_exp src pix bkg pix net_rate +/- mag UL sum_rate +/- mag UL sumexp wtd_rate +/- mag wt/t
Low bkg: 1 uu663441299I 1182.2 0 5852 0.000 0.000
% 1 uu663441299I 166377.8 1.00 1182.2 0.0 108 0 5852
Low bkg: 2 uu663449227I 347.7 0 5828 0.000 0.000
% 2 uu663449227I 174305.5 1.00 347.7 0.0 116 0 5828
Low bkg: 3 uu663454012I 1248.4 0 5852 0.000 0.000
% 3 uu663454012I 179090.4 1.00 1248.4 0.0 112 0 5852
Low bkg: 4 uu663458597I 191.9 0 5836 0.000 0.001
% 4 uu663458597I 183675.9 1.00 191.9 0.0 112 0 5836
Wrote uvot_fluxes_220110d03h00m35s296496usUT.qdp
Failed to write uvot_fluxes_220110d03h00m35s296496usUT.gif
Failed to write uvot_fluxes_220110d03h00m35s296496usUT.ps
Wrote uvot_fluxes_220110d03h00m35s296496usUT_vis.qdp
Wrote uvot_fluxes_220110d03h00m35s296496usUT_uv.qdp
Found 4 exposures with unusual background rate
Normal end of uvot_fluxes_wget.pl vrs. 2020-11-03a fem