# uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250728d23h33m17s210964usUT
# /Home/eud/uvot_tdrss/perl/uvot_fluxes_wget.pl -seq=00021852002 -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
# ========= GRB250728A ===================
Could not find/read custom source region custom_021852_src.reg
Used archived BAT position of 260.94500 16.20490
Reference: GCN_Circ-41185
The position is (17:23:46.80, +16:12:17.6)
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(260.945,16.2049,3") # color=red dash=0
Source region spec. is: 260.945 16.2049 3"
Region file centered at (260.945,16.2049), which is (17:23:46.80, +16:12:17.6)
Could not find/read custom background region custom_021852_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 -36.03536 from uncorrected trigger time of 775301145.57 in BAT summary file
# ============ Reading file sw00021852001uuu_sk.img ================
Long-term sensitivity correction to zero point is -0.246 at 775402294
The processing date in extension 0 is: 2025-07-28T19:36:54
The trigger time is: 775301181.60536. The reference is BAT GRB summary file
Using zero point of 18.094 for filter U
Use aperture correction of 1.100 based on aperture of 3.00
Using background region based on sources found in extension 1:
# 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(260.945,16.2049,25")
fk5;-circle(260.945,16.2049,12.5")
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 uu775402293I 101112.0 0.99 1678.6 600.8 128 28955 5892 0.000 0.017 99.00 21.5 0.0000 0.0167 99.00 21.5 1679 0.000 12.865 99.00 0.003
Sum (T+101112 to 102818): 629.0 629.0 (est. in src region) SNR_unwtd_sum: 0.00 0.9883 signif. UL: 21.53
0 1679 775403146 101964.8 852.8 -852.8 0.0000 0.0167 99.000 99.000 -99.000
Total wtd_rate (for all exposures so far): 0.000 +/-12.727 snr: 0.0 mag: 99.00 UL: 14.33
# ============ Reading file sw00021852002uuu_sk.img ================
Long-term sensitivity correction to zero point is -0.246 at 775414168
The processing date in extension 0 is: 2025-07-28T23:18:31
The trigger time is: 775301181.60536. The reference is BAT GRB summary file
Using zero point of 18.094 for filter U
Use aperture correction of 1.100 based on aperture of 3.00
Using background region based on sources found in extension 1:
# 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(260.945,16.2049,25")
fk5;-circle(260.945,16.2049,12.5")
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 uu775414167I 112986.3 1.00 1578.9 343.4 112 18944 5868 0.000 0.013 99.00 21.8 0.0000 0.0134 99.00 21.8 1579 0.000 11.538 99.00 0.005
Sum (T+112986 to 114591): 361.6 361.6 (est. in src region) SNR_unwtd_sum: 0.00 0.9883 signif. UL: 21.77
0 1579 775414970 113788.4 802.1 -802.1 0.0000 0.0134 99.000 99.000 -99.000
Total wtd_rate (for all exposures so far): 0.000 +/- 8.504 snr: 0.0 mag: 99.00 UL: 14.77
Rebinned Data for sw00021852002uuu_sk.img using a zero point of 18.094:
No Exposure t-avg + / - net_rate +/- mag +/- t-avg sum_rate +/- mag +/- UL3
0 3.24e+03 107700.6 6889.9 -6588.6 0.0000 0.0108 99.00 99.00 107700.6 0.0000 0.0108 99.00 99.00 21.74
The data range from T+101112.0 s (1.17 d) to T+114590.5 s (1.33 d)
Wrote uvot_fluxes_250728d23h33m17s210964usUT.qdp
Wrote uvot_fluxes_250728d23h33m17s210964usUT.gif
Wrote uvot_fluxes_250728d23h33m17s210964usUT.ps
Wrote uvot_fluxes_250728d23h33m17s210964usUT_vis.qdp
Wrote uvot_fluxes_250728d23h33m17s210964usUT_uv.qdp
Wrote uvot_fluxes_250728d23h33m17s210964usUT_vis.gif
Wrote uvot_fluxes_250728d23h33m17s210964usUT_vis.ps
# ================ Make Light Curve for Weighted Filters ==========
Use the following filters with indicated color corrections (mags):
white (0) , v (0) , b (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 0.00179 108517.7 6072.8 -7405.7 0.0000 0.0792 99.00 99.00 108517.7 0.0000 0.0792 99.00 99.00 21.78
The data range from T+101112.0 s (1.17 d) to T+114590.5 s (1.33 d)
Wrote uvot_fluxes_wtd_250728d23h33m17s210964usUT.qdp
Wrote uvot_fluxes_wtd_250728d23h33m17s210964usUT.gif
Wrote uvot_fluxes_wtd_250728d23h33m17s210964usUT.ps
Normal end of uvot_fluxes_wget.pl vrs. 2024-08-27 fem