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 v2.48
Process Start Time: Mon Oct 24 11:28:02 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1116441
======================================================================
Trigger: 01116441 Segment: 000
BAT Trigger Time: 679616711.68 [s; MET]
Trigger Stop: 679616712.704 [s; MET]
UTC: 2022-07-15T22:24:42.178080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.88862245431 Dec: -33.5970201018269 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.46
Image Trigger?: NO
Rate S/N Ratio: 24.8596057893121 [ if not an image trigger ]
Image S/N Ratio: 11.46
Analysis Position: [ source = BAT ]
RA: 254.88862245431 Dec: -33.5970201018269 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 254.855592534367 Dec: -33.5841742333509 [deg; J2000]
{ 16h 59m 25.3s , -33d 35' 03.0" }
+/- 1.06689006436006 [arcmin] (estimated 90% radius based on SNR)
+/- 0.486809626556817 [arcmin] (formal 1-sigma fit error)
SNR: 27.7298437120188
Angular difference between the analysis and refined position is 1.821921 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 40.4079998731613 +/- 1.21780951493553
Measured from: 0.400000095367432
to: 40.8079999685287 [s; relative to TRIGTIME]
T50: 15.1599999666214 +/- 3.22868138718018
Measured from: 3.75200009346008
to: 18.9120000600815 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0759999752044678
to: 0.924000024795532 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.148000001907349
to: 42.1720000505447 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.484531 0.719718 0.539886 0.148399
0.043971 0.041845 0.035184 0.029214 [error]
Peak 0.038440 0.055275 0.062199 0.035441
0.006909 0.007038 0.006612 0.005433 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 42.320 -0.148 42.172
T90 40.408 0.400 40.808
T50 15.160 3.752 18.912
Peak 1.000 -0.076 0.924
====== 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: N/A)
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 -1.358 -0.112 0.113 - - - 2.90e-03 -1.84e-04 1.84e-04 73.410 57
CPL -1.010 -0.395 0.502 144.007 -57.560 -144.007 4.32e-03 -1.52e-03 3.26e-03 71.670 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
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 -0.785 -0.233 0.247 - - - 1.13e-02 -1.43e-03 1.39e-03 51.020 57
CPL -0.795 -0.218 0.267 9999.360 -9999.360 -9999.360 1.15e-02 -1.47e-03 1.26e-03 51.090 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 1.37e-07 2.75e-07 4.29e-07 1.47e-06 1.19e-06 2.31e-06 erg/cm2
90%_error_low -1.59e-08 -1.94e-08 -3.38e-08 -2.42e-07 -8.34e-08 -2.67e-07 erg/cm2
90%_error_hi 1.64e-08 1.92e-08 3.37e-08 2.75e-07 8.40e-08 2.94e-07 erg/cm2
Peak flux PL 2.36e-01 3.65e-01 4.24e-01 9.47e-01 1.30e+00 1.97e+00 ph/cm2/s
90%_error_low -6.60e-02 -6.40e-02 -5.08e-02 -2.50e-01 -1.57e-01 -2.65e-01 ph/cm2/s
90%_error_hi 7.39e-02 6.21e-02 5.03e-02 3.14e-01 1.57e-01 2.90e-01 ph/cm2/s
Fluence CPL 1.29e-07 2.84e-07 4.38e-07 8.68e-07 1.16e-06 1.72e-06 erg/cm2
90%_error_low -1.89e-08 -2.30e-08 -3.65e-08 -4.06e-07 -9.64e-08 -4.12e-07 erg/cm2
90%_error_hi 1.93e-08 2.36e-08 3.71e-08 6.10e-07 9.54e-08 9.88e-07 erg/cm2
Peak flux CPL 2.36e-01 3.65e-01 4.24e-01 9.37e-01 1.30e+00 2.08e+00 ph/cm2/s
90%_error_low -6.62e-02 -6.41e-02 -5.09e-02 N/A -1.57e-01 -4.33e-01 ph/cm2/s
90%_error_hi 7.38e-02 6.21e-02 5.05e-02 N/A 1.57e-01 1.75e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 254.8556 -33.5842 0.0069 12.4793 43.2912 1.4608360 27.730 TRIG_01116441 Foreground time interval of the image: -0.148 17.621 (delta_t = 17.769 [sec]) Background time interval of the image: -239.680 -0.148 (delta_t = 239.532 [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 -0.148 sec. to 42.172 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35758 ( -0.112202 0.112959 ) Norm@50keV : 2.89559E-03 ( -0.000183862 0.000183779 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 73.41 using 59 bins. Reduced chi-squared = 1.28789 # Null hypothesis probability of 7.06e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 42.32 sec: 0.349389 ( -0.022965 0.023008 ) ph/cm2/s Energy fluence (15-150 keV) : 1.19496e-06 ( -8.34487e-08 8.39917e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.148 sec. to 42.172 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.00952 ( -0.394883 0.50159 ) Epeak [keV] : 144.007 ( -57.5944 -144.041 ) Norm@50keV : 4.32107E-03 ( -0.0015217 0.00326071 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 71.67 using 59 bins. Reduced chi-squared = 1.27982 # Null hypothesis probability of 7.74e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 42.32 sec: 0.343463 ( -0.024246 0.024213 ) ph/cm2/s Energy fluence (15-150 keV) : 1.15978e-06 ( -9.64067e-08 9.53707e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.076 sec. to 0.924 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.78456 ( -0.232652 0.247336 ) Norm@50keV : 1.13388E-02 ( -0.00143196 0.00139311 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.02 using 59 bins. Reduced chi-squared = 0.895088 # Null hypothesis probability of 6.98e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.30396 ( -0.15694 0.15745 ) ph/cm2/s Energy fluence (15-150 keV) : 1.33386e-07 ( -1.66459e-08 1.67207e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.076 sec. to 0.924 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.778049 ( -0.219208 0.2665 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 1.14211E-02 ( -0.0014371 0.00130132 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.08 using 59 bins. Reduced chi-squared = 0.912143 # Null hypothesis probability of 6.61e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.30382 ( -0.15725 0.15711 ) ph/cm2/s Energy fluence (15-150 keV) : 1.3326e-07 ( -1.65952e-08 1.67637e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = 1.610911034732715E-01, IMY = -1.517577110956456E-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: -239.680000 -0.148000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.7346 -62.8520 6.0 39.4 -108.2 2.2630 2.0 5.3 GX 301-2 245.0058 -15.6276 0.8 30.7 18.4 7.1681 14.8 1.7 Sco X-1 256.0129 -37.7967 2.5 8.6 54.3 1.6348 4.7 3.1 4U 1700-377 256.3864 -36.6283 0.0 9.8 53.6 1.2458 3.6 12.5 GX 349+2 262.8358 -24.7230 5.7 22.9 57.9 -0.8617 -2.0 9.5 GX 1+4 264.4502 -44.4337 0.0 9.1 116.9 0.3709 1.0 12.6 4U 1735-44 270.2815 -25.1114 2.8 25.5 73.2 2.0095 4.1 1.9 GX 5-1 270.2001 -25.7008 5.7 25.0 73.7 0.9393 2.0 6.1 GRS 1758-258 274.0719 -13.9620 5.8 37.0 69.0 2.3184 2.0 5.9 GX 17+2 275.9198 -30.5700 0.0 24.2 90.5 0.4433 0.8 12.2 H1820-303 285.0093 -24.7684 87.4 34.0 94.3 0.1044 0.1 9.2 HT1900.1-2455 263.0606 -33.9224 9.7 14.7 71.1 0.4495 1.2 6.4 GX 354-0 314.5762 -44.9886 2.4 42.9 143.7 4.8969 4.8 ------ UNKNOWN 310.4903 -46.9949 2.8 39.5 144.9 3.3846 4.1 ------ UNKNOWN 259.1886 -35.1358 2.9 12.1 61.6 1.2506 4.0 ------ UNKNOWN 352.4221 -58.9168 2.7 56.8 173.9 5.8376 4.2 ------ UNKNOWN 227.3310 -16.8243 3.9 35.4 -11.9 1.2919 3.0 ------ UNKNOWN 228.0111 -29.2642 3.0 24.9 -25.3 1.4274 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.148000 17.620640 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.6205 -62.6246 9.7 39.5 -107.8 0.1914 1.2 8.8 GX 301-2 245.0753 -15.5385 5.9 30.8 18.6 -0.1293 -1.9 8.2 Sco X-1 256.0579 -37.8237 4.5 8.6 54.6 -0.1365 -2.5 3.6 4U 1700-377 256.4842 -36.2179 0.0 10.3 53.2 0.0915 1.7 12.5 GX 349+2 263.0163 -24.7397 6.7 23.0 58.3 -0.1149 -1.7 0.5 GX 1+4 264.7677 -44.2389 0.0 9.3 116.0 -0.0878 -1.7 12.7 4U 1735-44 270.5137 -25.0809 0.0 25.6 73.5 -0.0639 -0.8 12.5 GX 5-1 270.2242 -25.7652 8.2 24.9 73.9 0.1112 1.4 4.4 GRS 1758-258 273.9052 -14.0736 9.5 36.8 68.8 -0.1720 -1.2 6.3 GX 17+2 275.9059 -30.2349 18.7 24.4 89.9 -0.0457 -0.6 8.0 H1820-303 285.0394 -24.8927 12.7 33.9 94.5 0.1037 0.9 1.7 HT1900.1-2455 262.8184 -33.7605 4.7 14.7 70.1 0.1477 2.5 9.6 GX 354-0 254.8556 -33.5842 0.4 12.5 43.3 1.4609 27.8 ------ UNKNOWN 203.6501 -13.9711 2.1 51.3 -36.5 1.0366 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 80.020600 962.383100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.5747 -62.6170 49.5 50.8 -138.1 1.2725 0.2 9.5 GX 301-2 244.9894 -15.6547 0.5 20.0 -20.5 27.4043 21.5 1.0 Sco X-1 255.9906 -37.8454 0.6 4.4 177.0 21.2714 18.0 0.2 4U 1700-377 256.4466 -36.4315 5.0 3.1 164.9 2.7582 2.3 0.7 GX 349+2 262.8657 -24.8436 7.4 11.2 49.0 1.8689 1.6 9.8 GX 1+4 264.6336 -44.3164 14.1 13.1 156.2 1.0188 0.8 9.3 4U 1735-44 268.5075 -1.4552 6.0 34.6 32.9 -4.0688 -1.9 8.4 SW J1753.5-0127 270.0792 -24.9795 0.0 15.8 69.4 -1.4034 -1.0 12.6 GX 5-1 270.0964 -25.6438 0.0 15.4 71.4 -1.8369 -1.3 12.6 GRS 1758-258 274.0350 -13.9265 4.0 26.2 54.5 5.2390 2.9 6.8 GX 17+2 276.0580 -30.4770 5.7 18.2 94.4 2.9320 2.0 9.5 H1820-303 285.2126 -24.9121 9.1 27.7 88.3 -2.5285 -1.3 9.6 HT1900.1-2455 263.1404 -33.7119 7.0 6.9 101.8 1.8989 1.6 10.5 GX 354-0 255.4341 20.6696 2.5 54.3 9.1 12.9587 4.6 ------ UNKNOWN 250.5265 21.0413 2.6 54.8 3.4 12.2025 4.5 ------ UNKNOWN 243.3844 0.0022 4.2 35.3 -11.8 4.5494 2.8 ------ UNKNOWN 229.0279 17.9528 2.1 57.1 -21.2 23.1793 5.5 ------ UNKNOWN 163.1119 -77.3096 3.3 57.7 -156.5 28.2698 3.5 ------ UNKNOWN 219.8935 -2.7769 3.7 44.9 -45.8 10.6829 3.2 ------ UNKNOWN