Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done using the HEASARC data.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.47
Process Start Time: Mon Jun 29 15:01:12 EDT 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger973140
======================================================================
Trigger: 00973140 Segment: 000
BAT Trigger Time: 611580048.704 [s; MET]
Trigger Stop: 611580049.216 [s; MET]
UTC: 2020-05-19T11:20:23.737180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 255.333724559987 Dec: -30.3801063280011 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.13
Image Trigger?: NO
Rate S/N Ratio: 25.298221281347 [ if not an image trigger ]
Image S/N Ratio: 11.13
Analysis Position: [ source = BAT ]
RA: 255.333724559987 Dec: -30.3801063280011 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 255.320454055665 Dec: -30.3938971451017 [deg; J2000]
{ 17h 01m 16.9s , -30d 23' 38.0" }
+/- 0.847473132996253 [arcmin] (estimated 90% radius based on SNR)
+/- 0.296416639786795 [arcmin] (formal 1-sigma fit error)
SNR: 38.529698459602
Angular difference between the analysis and refined position is 1.075377 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 71.6959999799728 +/- 1.20481696025365
Measured from: 3.24800002574921
to: 74.944000005722 [s; relative to TRIGTIME]
T50: 5.77199995517731 +/- 0.249735854854711
Measured from: 21.8040000200272
to: 27.5759999752045 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 23.527999997139
to: 24.527999997139 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.452000021934509
to: 100.703999996185 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.062228 7.095986 5.637772 1.432913
0.075752 0.072158 0.062951 0.049236 [error]
Peak 0.548175 0.923295 0.963818 0.280682
0.013064 0.016032 0.016750 0.011741 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 101.156 -0.452 100.704
T90 71.696 3.248 74.944
T50 5.772 21.804 27.576
Peak 1.000 23.528 24.528
====== Spectral Analysis Summary =====================================
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^{Ph_index}
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedo
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.429 -0.031 0.031 - - - 1.22e-02 -1.99e-04 1.98e-04 42.720 57
CPL -1.365 -0.076 0.126 599.852 -599.852 -599.852 1.29e-02 -4.93e-04 1.62e-03 41.960 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
Model Ph_index Ph_90err_low Ph_90err_hi Epeak Epeak_90err_low Epeak_90err_hi Norm Nomr_90err_low Norm_90err_hi chi2 dof
PL -1.076 -0.040 0.040 - - - 1.78e-01 -3.87e-03 3.87e-03 48.810 57
CPL -0.836 -0.160 0.165 292.702 -93.826 419.372 2.25e-01 -3.14e-02 3.77e-02 42.120 56
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence PL 1.47e-06 2.83e-06 4.20e-06 1.34e-05 1.18e-05 2.19e-05 erg/cm2
90%_error_low -5.36e-08 -5.96e-08 -7.45e-08 -5.70e-07 -1.90e-07 -5.88e-07 erg/cm2
90%_error_hi 5.45e-08 5.95e-08 7.43e-08 5.87e-07 1.90e-07 6.02e-07 erg/cm2
Peak flux PL 4.90e+00 6.35e+00 6.02e+00 1.01e+01 2.06e+01 2.74e+01 ph/cm2/s
90%_error_low -2.28e-01 -1.77e-01 -1.41e-01 -5.21e-01 -4.66e-01 -6.23e-01 ph/cm2/s
90%_error_hi 2.32e-01 1.77e-01 1.40e-01 5.38e-01 4.67e-01 6.26e-01 ph/cm2/s
Fluence CPL 1.44e-06 2.83e-06 4.23e-06 1.24e-05 1.18e-05 2.09e-05 erg/cm2
90%_error_low -7.52e-08 -6.03e-08 -8.84e-08 -1.69e-06 -2.06e-07 -1.69e-06 erg/cm2
90%_error_hi 7.11e-08 6.03e-08 9.00e-08 1.28e-06 2.02e-07 1.17e-06 erg/cm2
Peak flux CPL 4.55e+00 6.38e+00 6.19e+00 8.10e+00 2.04e+01 2.52e+01 ph/cm2/s
90%_error_low -3.11e-01 -1.82e-01 -1.80e-01 -1.08e+00 -4.98e-01 -1.24e+00 ph/cm2/s
90%_error_hi 3.18e-01 1.82e-01 1.81e-01 1.29e+00 5.00e-01 1.42e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 255.3205 -30.3939 0.0050 8.0367 50.8046 1.5718573 38.530 TRIG_00973140 Foreground time interval of the image: -0.452 9.997 (delta_t = 10.449 [sec]) Background time interval of the image: -239.704 -0.452 (delta_t = 239.252 [sec])
Light Curves
Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.
Full-time range; 1 s binning
Other quick-look light curves:
- 64 ms binning (zoomed)
- 16 ms binning (zoomed)
- 8 ms binning (zoomed)
- 2 ms binning (zoomed)
- SN=5 or 10 s binning (full-time range)
- Raw light curve
Spectra
- 64 ms binning (zoomed)
- 16 ms binning (zoomed)
- 8 ms binning (zoomed)
- 2 ms binning (zoomed)
- SN=5 or 10 s binning (full-time range)
- Raw light curve
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -0.452 sec. to 100.704 sec. XSPEC12>exit XSPEC: quit Photon index: -1.42896 ( -0.0313725 0.0314473 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.42896 ( -0.0314473 0.0313725 ) Norm@50keV : 1.21823E-02 ( -0.000198568 0.000198296 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 101.2 sec: 1.49366 ( -0.02896 0.02907 ) ph/cm2/s Energy fluence (15-150 keV) : 1.18457e-05 ( -1.89637e-07 1.90014e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.452 sec. to 100.704 sec. XSPEC: quit Photon index: -1.36535 ( -0.075616 0.126221 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.36535 ( -0.126221 0.075616 ) Epeak [keV] : 599.852 ( -599.87 -599.87 ) Norm@50keV : 1.29474E-02 ( -0.00049276 0.00161693 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 101.2 sec: 1.48467 ( -0.03339 0.03361 ) ph/cm2/s Energy fluence (15-150 keV) : 1.18035e-05 ( -2.06333e-07 2.02045e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 23.528 sec. to 24.528 sec. XSPEC12>exit XSPEC: quit Photon index: -1.07644 ( -0.0396925 0.0397766 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.07644 ( -0.0397766 0.0396925 ) Norm@50keV : 0.178279 ( -0.00387333 0.00387024 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 20.6346 ( -0.4665 0.467 ) ph/cm2/s Energy fluence (15-150 keV) : 1.87841e-06 ( -4.33934e-08 4.34423e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.528 sec. to 24.528 sec. XSPEC: quit Photon index: -0.836151 ( -0.159575 0.165297 ) ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.836151 ( -0.165297 0.159575 ) Epeak [keV] : 292.702 ( -93.8253 419.372 ) Norm@50keV : 0.224815 ( -0.0313749 0.0376813 ) ------------------------------------------------------------ Photon flux (15-150 keV) in 1 sec: 20.3521 ( -0.4984 0.5 ) ph/cm2/s Energy fluence (15-150 keV) : 1.86016e-06 ( -4.54802e-08 4.53446e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 71.696 sec. Hardness ratio (energy fluence ratio) = 1.48562745875
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.299497e-06 S(50-150 keV) = 7.546371e-06
The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.
Mask shadow pattern
IMX = 8.923010412344813E-02, IMY = -1.094247107851486E-01
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image: -239.704000 -0.452000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9696 -15.6435 0.4 22.4 94.8 11.9856 32.5 0.6 Sco X-1 255.9167 -37.8144 6.2 11.2 9.2 0.5520 1.9 3.8 4U 1700-377 256.2476 -36.4524 8.4 10.1 13.3 0.3781 1.4 9.2 GX 349+2 262.9430 -24.6612 26.6 4.7 134.9 0.1145 0.4 6.2 GX 1+4 264.8892 -44.5635 8.1 15.4 -29.0 0.3742 1.4 9.3 4U 1735-44 268.4127 -1.3100 25.7 28.1 160.6 -0.1463 -0.4 9.0 SW J1753.5-0127 270.2405 -25.0337 4.1 6.6 -155.0 0.7845 2.8 3.6 GX 5-1 270.4194 -25.7137 4.1 6.3 -149.3 0.8182 2.9 6.6 GRS 1758-258 273.8923 -13.9590 6.7 17.5 -175.9 0.4870 1.7 8.1 GX 17+2 276.0071 -30.5354 43.1 10.1 -107.0 0.0747 0.3 11.0 H1820-303 284.9049 -25.0315 11.4 18.6 -125.7 0.3207 1.0 9.8 HT1900.1-2455 288.9305 10.9938 226.0 46.6 -173.8 -0.0330 -0.1 8.3 GRS 1915+105 263.0606 -34.0377 0.0 5.1 -14.5 0.2977 1.0 12.7 GX 354-0 221.4335 -46.7009 2.7 37.6 22.2 1.8095 4.3 ------ UNKNOWN 267.6230 -0.1310 2.0 29.2 158.6 1.9279 5.6 ------ UNKNOWN 302.2308 -24.2818 4.5 33.9 -117.0 1.3493 2.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.452000 9.996590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8443 -15.7183 4.4 22.5 94.5 -0.1417 -2.6 9.1 Sco X-1 256.0353 -38.0470 37.5 11.3 8.1 0.0128 0.3 12.4 4U 1700-377 256.4266 -36.5586 21.9 10.0 12.3 -0.0219 -0.5 8.1 GX 349+2 263.1898 -24.6642 5.4 4.6 137.5 0.0943 2.1 11.0 GX 1+4 264.6343 -44.5775 7.6 15.5 -28.3 0.0635 1.5 9.0 4U 1735-44 268.4909 -1.3459 6.0 28.0 160.7 0.1024 1.9 9.8 SW J1753.5-0127 270.2459 -25.2285 14.5 6.5 -153.7 -0.0340 -0.8 9.2 GX 5-1 270.5225 -25.6711 0.0 6.4 -149.1 -0.0683 -1.6 12.7 GRS 1758-258 273.9349 -13.8401 0.0 17.6 -176.0 0.0602 1.4 12.5 GX 17+2 275.9245 -30.2068 41.4 10.0 -108.8 -0.0128 -0.3 9.6 H1820-303 284.9500 -24.8341 6.7 18.7 -126.3 -0.0811 -1.7 7.0 HT1900.1-2455 288.8934 10.8984 6.1 46.4 -173.8 0.1666 1.9 6.3 GRS 1915+105 262.9007 -33.8557 3.0 4.9 -12.5 0.1650 3.9 4.6 GX 354-0 233.9051 -13.6625 2.3 32.2 84.3 0.3957 5.0 ------ UNKNOWN 209.5857 -44.7293 2.6 45.6 26.6 0.4593 4.5 ------ UNKNOWN 255.3204 -30.3939 0.3 8.0 50.8 1.5720 38.5 ------ UNKNOWN 240.8835 -54.6044 2.3 30.6 -0.8 0.2553 5.1 ------ UNKNOWN 272.5760 -22.5204 2.3 9.8 -158.2 0.2159 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 38.396600 962.356000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.5516 -62.7164 3.7 53.7 4.6 8.3670 3.1 4.3 GX 301-2 244.9760 -15.6439 0.3 17.5 117.5 41.6564 35.8 0.3 Sco X-1 256.1086 -37.9828 6.6 7.6 -31.9 -1.6609 -1.8 10.1 4U 1700-377 256.4133 -36.4234 3.1 6.1 -35.5 3.7134 3.7 1.1 GX 349+2 262.8484 -24.7084 14.7 8.7 -156.1 0.7029 0.8 9.0 GX 1+4 264.7163 -44.5913 147.2 16.0 -52.3 0.0711 0.1 8.6 4U 1735-44 268.4534 -1.3565 7.1 31.6 178.3 2.0068 1.6 7.7 SW J1753.5-0127 270.2946 -25.1399 2.6 14.2 -135.4 4.4027 4.5 3.7 GX 5-1 270.1779 -25.7348 3.4 13.9 -133.4 3.6796 3.7 6.8 GRS 1758-258 274.1340 -13.9268 14.1 23.9 -156.8 -0.8517 -0.8 9.9 GX 17+2 275.8858 -30.4022 7.2 17.7 -112.1 1.6452 1.6 2.9 H1820-303 285.0339 -24.9262 17.7 26.8 -121.8 0.8224 0.7 0.4 HT1900.1-2455 288.8420 11.0569 11.3 52.5 -164.3 -2.8270 -1.0 7.2 GRS 1915+105 262.8500 -33.9225 5.4 7.3 -86.3 1.9774 2.1 8.7 GX 354-0 212.8512 -23.1351 3.4 38.4 63.0 7.7687 3.4 ------ UNKNOWN 251.9145 11.3136 3.3 41.8 147.6 8.4292 3.5 ------ UNKNOWN 185.7551 -59.9483 3.6 53.9 8.1 9.1861 3.2 ------ UNKNOWN 251.0140 -31.1431 3.6 3.8 50.1 2.7950 3.2 ------ UNKNOWN 294.2821 9.6686 2.6 54.8 -158.1 15.4772 4.4 ------ UNKNOWN 177.9126 -84.5224 4.0 58.6 -21.1 15.8883 2.9 ------ UNKNOWN 285.0899 -83.5978 3.3 54.1 -31.3 14.9888 3.5 ------ UNKNOWN