# uvot_fluxes_wget.pl vrs. 2016-02-01 fem at 170202d06h16m02s960432usUT
# /Home/eud/uvot_tdrss/perl/uvot_fluxes_wget.pl -seq=00020738992 -use_uvot -rebin -plot_mag -sens_corr -search_src_reg -wrk_dir=/local/home/khamseen/khamseen10/uvot_tdrss/uvot_lc -web -zp_2011 -gamma=1.0 -use_filter_wtd=white v b u
# Current directory: /local/home/khamseen/khamseen10/uvot_tdrss/uvot_lc
# ========= GRB170131C ===================
Used archived BAT position of 341.44700 64.00600
Reference: GCN_Circ-20570
The position is (22:45:47.28, +64:00:21.6)
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(341.447,64.006,3") # color=red dash=0
Region file centered at (341.447,64.006), which is (22:45:47.28, +64:00:21.6)
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 3600.0,
3 sigma should become about 5.1 sigma and 2 sigma should become about 4.5 sigma.
Accordingly confidence limits in the tables have been adjusted from 0.9987 to 0.99999964.
No adjustment has been made for the confidence limits for the rebinned data or the plots.
Subtract UTCF of -18.52664 from uncorrected trigger time of 507597313 in BAT summary file
# ============ Reading file sw00020738992uw2_sk.img ================
Long-term sensitivity correction to zero point is -0.335 at 507675700
The processing date in extension 0 is: 2017-02-02T06:10:08
The trigger time is: 507597331.52664. The reference is BAT GRB summary file
Using zero point of 17.045 for filter UVW2
Use aperture correction of 1.108 based on aperture of 3.00
Using background region based on sources found in extension 4:
# 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(341.447,64.006,25")
fk5;-circle(341.447,64.006,12.5")
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
High bkg: 1 w2507675699I 552.5 4489 5844 1.390 0.021
1 w2507675699I 78368.0 1.00 552.5 84.9 112 4489 5844 0.000 0.019 99.00 19.6 0.0000 0.0188 99.00 19.6 552 0.000 29.405 99.00 0.004
High bkg: 2 w2507681502I 273.7 1761 5820 1.105 0.026
2 w2507681502I 84171.2 1.00 273.7 38.4 104 1761 5820 0.000 0.023 99.00 19.4 0.0000 0.0147 99.00 19.9 826 0.000 23.354 99.00 0.004
3 w2507682572I 85240.6 1.00 815.9 39.4 112 2245 5836 0.000 0.009 99.00 20.4 0.0000 0.0086 99.00 20.4 1642 0.000 12.809 99.00 0.006
4 w2507687136I 89805.3 1.00 2277.3 165.0 116 7684 5872 0.000 0.006 99.00 20.8 0.0000 0.0050 99.00 21.0 3919 0.000 8.321 99.00 0.007
5 w2507692885I 95554.3 1.00 969.0 66.6 112 3620 5848 0.000 0.010 99.00 20.3 0.0000 0.0045 99.00 21.2 4888 0.000 7.579 99.00 0.007
Sum (T+ 78368 to 96539): 381.7 381.7 (est. in src region) SNR_unwtd_sum: 0.00 0.999999638888889 signif. UL: 21.15
0 4888 507686652 89320.3 7218.6 -10952.3 0.0000 0.0045 99.000 99.000 -99.000
Total wtd_rate (for all exposures so far): 0.000 +/- 7.506 snr: 0.0 mag: 99.00 UL: 13.09
Rebinned Data for sw00020738992uw2_sk.img using a zero point of 17.045:
No Exposure t-avg + / - net_rate +/- mag +/- t-avg sum_rate +/- mag +/- UL3
0 4.88e+03 89322.1 7216.8 -10954.1 0.0000 0.0045 99.00 99.00 89322.1 0.0000 0.0045 99.00 99.00 21.65
The data range from T+78368.0 s (0.91 d) to T+96538.9 s (1.12 d)
Wrote uvot_fluxes_170202d06h16m02s960432usUT.qdp
Wrote uvot_fluxes_170202d06h16m02s960432usUT.gif
Wrote uvot_fluxes_170202d06h16m02s960432usUT.ps
Wrote uvot_fluxes_170202d06h16m02s960432usUT_vis.qdp
Wrote uvot_fluxes_170202d06h16m02s960432usUT_uv.qdp
Wrote uvot_fluxes_170202d06h16m02s960432usUT_uv.gif
Wrote uvot_fluxes_170202d06h16m02s960432usUT_uv.ps
Found 2 exposures with unusual background rate
Normal end of uvot_fluxes_wget.pl vrs. 2016-02-01 fem