# uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250718d04h40m55s016452usUT
# /Home/eud/uvot_tdrss/perl/uvot_fluxes_wget.pl -seq=00021846001 -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
# ========= GRB250717B ===================
Could not find/read custom source region custom_021846_src.reg
Used archived BAT position of 44.11790 26.37890
Reference: GCN_Circ-41110
The position is (02:56:28.30, +26:22:44.0)
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(44.1179,26.3789,3") # color=red dash=0
Source region spec. is: 44.1179 26.3789 3"
Region file centered at (44.1179,26.3789), which is (02:56:28.30, +26:22:44.0)
Could not find/read custom background region custom_021846_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 -35.9158 from uncorrected trigger time of 774366262 in BAT summary file
# ============ Reading file sw00021846001uwh_sk.img ================
Long-term sensitivity correction to zero point is -0.175 at 774480675
The processing date in extension 0 is: 2025-07-18T04:31:36
The trigger time is: 774366297.9158. The reference is BAT GRB summary file
Using zero point of 20.115 for filter WHITE
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(44.1179,26.3789,25")
fk5;-circle(44.1179,26.3789,12.5")
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
1 wh774480674I 114376.8 0.94 93.3 317.4 116 16525 5824 0.000 0.231 99.00 20.7 0.0000 0.2310 99.00 20.7 93 0.000 31.061 99.00 0.002
2 wh774480772I 114474.9 0.92 536.9 2613.3 116 129080 5836 0.000 0.114 99.00 21.5 0.0000 0.1032 99.00 21.6 630 0.000 13.836 99.00 0.001
High bkg: 3 wh774481723I 8.5 3064 5860 61.499 1.111
3 wh774481723I 115425.4 0.88 8.5 60.2 104 3064 5860 0.000 1.098 99.00 19.0 0.0000 0.1029 99.00 21.6 639 0.000 13.777 99.00 0.001
above line uses coinc_corr_src: 0.883 corr_bkg: 0.883
4 wh774484992I 118694.2 0.95 202.5 679.9 116 33796 5884 0.000 0.151 99.00 21.2 0.0000 0.0860 99.00 21.8 841 0.000 11.526 99.00 0.002
5 wh774485200I 118903.1 0.94 1065.7 3571.3 108 187088 5828 0.000 0.066 99.00 22.1 0.0000 0.0527 99.00 22.3 1907 0.000 7.197 99.00 0.002
Sum (T+114377 to 120408): 7082.4 7082.4 (est. in src region) SNR_unwtd_sum: 0.00 0.9883 signif. UL: 22.31
0 1907 774484262 117964.2 2443.6 -3587.4 0.0000 0.0527 99.000 99.000 -99.000
Total wtd_rate (for all exposures so far): 0.000 +/- 7.129 snr: 0.0 mag: 99.00 UL: 16.98
Rebinned Data for sw00021846001uwh_sk.img using a zero point of 20.115:
No Exposure t-avg + / - net_rate +/- mag +/- t-avg sum_rate +/- mag +/- UL3
0 1.79e+03 117983.5 2424.3 -3606.7 0.0000 0.0527 99.00 99.00 117983.5 0.0000 0.0527 99.00 99.00 22.04
The data range from T+114376.8 s (1.32 d) to T+120407.9 s (1.39 d)
Wrote uvot_fluxes_250718d04h40m55s016452usUT.qdp
Wrote uvot_fluxes_250718d04h40m55s016452usUT.gif
Wrote uvot_fluxes_250718d04h40m55s016452usUT.ps
Wrote uvot_fluxes_250718d04h40m55s016452usUT_vis.qdp
Wrote uvot_fluxes_250718d04h40m55s016452usUT_uv.qdp
Wrote uvot_fluxes_250718d04h40m55s016452usUT_vis.gif
Wrote uvot_fluxes_250718d04h40m55s016452usUT_vis.ps
# ================ Make Light Curve for Weighted Filters ==========
Use the following filters with indicated color corrections (mags):
white (0) , b (0) , v (0) , u (0) ,
Rebinned Data for All_files using a zero point of 20.290:
No Exposure t-avg + / - net_rate +/- mag +/- t-avg sum_rate +/- mag +/- UL3
0 0.0164 118243.4 2164.5 -3866.6 0.0000 0.0609 99.00 99.00 118243.4 0.0000 0.0609 99.00 99.00 22.06
The data range from T+114376.8 s (1.32 d) to T+120407.9 s (1.39 d)
Wrote uvot_fluxes_wtd_250718d04h40m55s016452usUT.qdp
Wrote uvot_fluxes_wtd_250718d04h40m55s016452usUT.gif
Wrote uvot_fluxes_wtd_250718d04h40m55s016452usUT.ps
Found 1 exposures with unusual background rate
Normal end of uvot_fluxes_wget.pl vrs. 2024-08-27 fem