# uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220305d11h47m23s532446usUT
# /Home/eud/uvot_tdrss/perl/uvot_fluxes_wget.pl -seq=00021481002 -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
# ========= GRB220219B ===================
Could not find/read custom source region custom_021481_src.reg
Used archived BAT position of 240.91400 31.23500
Reference: GCN_Circ-31624
The position is (16:03:39.36, +31:14:06.0)
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(240.914,+31.235,3") # color=red dash=0
Source region spec. is: 240.914 +31.235 3"
Region file centered at (240.914,+31.235), which is (16:03:39.36, +31:14:06.0)
Could not find/read custom background region custom_021481_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 0.1,
3 sigma should become about 2.5 sigma and 2 sigma should become about 1.3 sigma.
Accordingly confidence limits in the tables have been adjusted from 0.9987 to 0.98830000.
No adjustment has been made for the confidence limits for the rebinned data or the plots.
Subtract UTCF of -28.64216 from uncorrected trigger time of 666955645 in BAT summary file
# ============ Reading file sw00021481002uw2_sk.img ================
Use keyword TRIGTIME of 666955673.6448 for trigger time.
Long-term sensitivity correction to zero point is -0.345 at 667278209
The processing date in extension 0 is: 2022-03-05T11:30:26
The trigger time is: 666955673.6448. The reference is keyword in image file
Using zero point of 17.035 for filter UVW2
Use aperture correction of 1.108 based on aperture of 3.00
Using background region based on sources found in extension 5:
# 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(240.914,+31.235,25")
fk5;-circle(240.914,+31.235,12.5")
fk5;-circle(240.905249,31.231229,6")
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
1 w2667278209I 322535.8 1.00 562.6 39.3 112 646 5852 0.000 0.007 99.00 21.4 0.0000 0.0070 99.00 21.4 563 0.000 45.218 99.00 0.007
2 w2667283549I 327875.7 1.00 739.9 46.5 112 853 5844 0.000 0.006 99.00 21.6 0.0000 0.0046 99.00 21.9 1302 0.000 30.047 99.00 0.007
3 w2667306528I 350855.2 1.00 385.9 21.1 104 421 5808 0.000 0.008 99.00 21.3 0.0000 0.0040 99.00 22.0 1688 0.000 26.473 99.00 0.007
4 w2667312244I 356570.8 1.00 724.8 53.7 112 883 5844 0.000 0.006 99.00 21.5 0.0000 0.0034 99.00 22.2 2413 0.000 22.872 99.00 0.007
5 w2667323893I 368219.4 1.00 1011.7 72.4 112 1405 5852 0.000 0.006 99.00 21.6 0.0000 0.0029 99.00 22.4 3425 0.000 20.127 99.00 0.006
Sum (T+322536 to 369247): 80.1 80.1 (est. in src region) SNR_unwtd_sum: 0.00 0.9883 signif. UL: 22.37
0 3425 667303632 347958.0 21289.3 -25422.2 0.0000 0.0029 99.000 99.000 -99.000
Total wtd_rate (for all exposures so far): 0.000 +/-19.939 snr: 0.0 mag: 99.00 UL: 12.78
Rebinned Data for sw00021481002uw2_sk.img using a zero point of 17.035:
No Exposure t-avg + / - net_rate +/- mag +/- t-avg sum_rate +/- mag +/- UL3
0 3.42e+03 347957.5 21289.8 -25421.7 0.0000 0.0029 99.00 99.00 347957.5 0.0000 0.0029 99.00 99.00 22.10
The data range from T+322535.8 s (3.73 d) to T+369247.3 s (4.27 d)
Wrote uvot_fluxes_220305d11h47m23s532446usUT.qdp
Wrote uvot_fluxes_220305d11h47m23s532446usUT.gif
Wrote uvot_fluxes_220305d11h47m23s532446usUT.ps
Wrote uvot_fluxes_220305d11h47m23s532446usUT_vis.qdp
Wrote uvot_fluxes_220305d11h47m23s532446usUT_uv.qdp
Wrote uvot_fluxes_220305d11h47m23s532446usUT_uv.gif
Wrote uvot_fluxes_220305d11h47m23s532446usUT_uv.ps
Normal end of uvot_fluxes_wget.pl vrs. 2020-11-03a fem