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: Wed Jun 14 12:24:53 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1123129
======================================================================
Trigger: 01123129 Segment: 000
BAT Trigger Time: 684252355.584 [s; MET]
Trigger Stop: 684252356.608 [s; MET]
UTC: 2022-09-07T14:05:25.767040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.870001475522 Dec: -20.3153434089484 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.52
Image Trigger?: NO
Rate S/N Ratio: 13.9642400437689 [ if not an image trigger ]
Image S/N Ratio: 8.52
Analysis Position: [ source = BAT ]
RA: 268.870001475522 Dec: -20.3153434089484 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 268.859737239318 Dec: -20.2975561348179 [deg; J2000]
{ 17h 55m 26.3s , -20d 17' 51.2" }
+/- 1.84686921582977 [arcmin] (estimated 90% radius based on SNR)
+/- 0.854461663850627 [arcmin] (formal 1-sigma fit error)
SNR: 12.6617962123207
Angular difference between the analysis and refined position is 1.213504 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 8.87999987602234 +/- 1.47397292721756
Measured from: -0.263999938964844
to: 8.6159999370575 [s; relative to TRIGTIME]
T50: 4.65199995040894 +/- 1.0846197289012
Measured from: 0.779999971389771
to: 5.43199992179871 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.700000047683716
to: 1.70000004768372 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.595999956130981
to: 9.23199999332428 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.119348 0.154724 0.209727 0.086153
0.025737 0.024638 0.021704 0.018836 [error]
Peak 0.027483 0.041412 0.047785 0.016366
0.008379 0.008336 0.007792 0.006684 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 9.828 -0.596 9.232
T90 8.880 -0.264 8.616
T50 4.652 0.780 5.432
Peak 1.000 0.700 1.700
====== 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 -1.011 -0.232 0.243 - - - 3.75e-03 -5.00e-04 4.94e-04 78.220 57
CPL -0.579 -0.540 1.372 199.097 -199.097 -199.097 5.67e-03 -2.65e-03 1.37e-02 77.750 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 -1.034 -0.319 0.334 - - - 8.58e-03 -1.66e-03 1.65e-03 72.260 57
CPL 0.618 -1.653 3.075 94.408 -25.033 2337.162 4.20e-02 -4.20e-02 4.86e-01 69.400 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 2.98e-08 7.40e-08 1.47e-07 7.26e-07 3.97e-07 9.77e-07 erg/cm2
90%_error_low -8.04e-09 -1.26e-08 -2.03e-08 -2.11e-07 -5.32e-08 -2.22e-07 erg/cm2
90%_error_hi 8.95e-09 1.23e-08 2.01e-08 2.70e-07 5.34e-08 2.73e-07 erg/cm2
Peak flux PL 2.26e-01 3.01e-01 2.94e-01 5.14e-01 9.90e-01 1.33e+00 ph/cm2/s
90%_error_low -8.14e-02 -7.26e-02 -6.02e-02 -1.92e-01 -1.95e-01 -2.66e-01 ph/cm2/s
90%_error_hi 9.41e-02 7.15e-02 5.95e-02 2.56e-01 1.96e-01 2.78e-01 ph/cm2/s
Fluence CPL 2.62e-08 7.51e-08 1.54e-07 4.40e-07 3.90e-07 6.96e-07 erg/cm2
90%_error_low -1.15e-08 -1.33e-08 -2.53e-08 -2.87e-07 -5.78e-08 -2.91e-07 erg/cm2
90%_error_hi 1.16e-08 1.34e-08 2.71e-08 5.16e-07 5.65e-08 3.59e-07 erg/cm2
Peak flux CPL 1.36e-01 3.08e-01 3.46e-01 1.74e-01 9.11e-01 9.64e-01 ph/cm2/s
90%_error_low -1.01e-01 -9.75e-02 -8.09e-02 -1.74e-01 -2.18e-01 -2.59e-01 ph/cm2/s
90%_error_hi 1.27e-01 8.59e-02 8.74e-02 3.56e-01 2.14e-01 4.03e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 268.8597 -20.2976 0.0151 25.0192 174.4959 0.6073847 12.662 TRIG_01123129 Foreground time interval of the image: -0.596 9.232 (delta_t = 9.828 [sec]) Background time interval of the image: -239.584 -0.596 (delta_t = 238.988 [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 -0.596 sec. to 9.232 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.01111 ( -0.231952 0.242554 ) Norm@50keV : 3.74857E-03 ( -0.000499596 0.000493992 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 78.22 using 59 bins. Reduced chi-squared = 1.37228 # Null hypothesis probability of 3.26e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 9.828 sec: 0.431833 ( -0.058848 0.059314 ) ph/cm2/s Energy fluence (15-150 keV) : 3.96867e-07 ( -5.32105e-08 5.34462e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.596 sec. to 9.232 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.57903 ( -0.540173 1.37204 ) Epeak [keV] : 199.097 ( -199.054 -199.054 ) Norm@50keV : 5.67182E-03 ( -0.00265297 0.0136835 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 77.75 using 59 bins. Reduced chi-squared = 1.38839 # Null hypothesis probability of 2.89e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 9.828 sec: 0.421540 ( -0.06505 0.064087 ) ph/cm2/s Energy fluence (15-150 keV) : 3.89534e-07 ( -5.78416e-08 5.64973e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.700 sec. to 1.700 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.03442 ( -0.319007 0.334091 ) Norm@50keV : 8.57900E-03 ( -0.00165601 0.00164623 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 72.26 using 59 bins. Reduced chi-squared = 1.26772 # Null hypothesis probability of 8.38e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.989751 ( -0.194669 0.196099 ) ph/cm2/s Energy fluence (15-150 keV) : 9.16706e-08 ( -1.85095e-08 1.8689e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.700 sec. to 1.700 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.617696 ( -1.65592 3.07286 ) Epeak [keV] : 94.4081 ( -25.0056 2337.19 ) Norm@50keV : 4.19818E-02 ( -0.0420934 0.485421 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 69.40 using 59 bins. Reduced chi-squared = 1.23929 # Null hypothesis probability of 1.08e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.911057 ( -0.218429 0.214003 ) ph/cm2/s Energy fluence (15-150 keV) : 8.53906e-08 ( -1.96263e-08 1.99947e-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 = -4.645637837252434E-01, IMY = -4.476556257540029E-02
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: -239.584000 -0.596000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9978 -15.6686 1.0 31.6 -137.4 6.5092 11.8 2.0 Sco X-1 254.6222 35.3622 5.9 33.6 -29.0 1.0734 2.0 8.1 Her X-1 255.9047 -37.9247 6.3 44.5 -171.5 1.4603 1.8 6.2 4U 1700-377 256.4306 -36.4304 4.4 42.9 -171.4 1.9832 2.7 0.5 GX 349+2 263.1550 -24.7327 4.7 30.1 -175.4 1.1967 2.5 8.0 GX 1+4 264.8427 -44.6110 0.0 49.5 177.5 1.3482 1.1 10.6 4U 1735-44 268.3951 -1.6069 505.2 6.4 -177.3 0.0089 0.0 9.4 SW J1753.5-0127 270.3352 -24.9473 19.3 29.7 171.6 0.3092 0.6 8.4 GX 5-1 270.3078 -25.6434 6.3 30.4 171.7 0.9904 1.8 6.0 GRS 1758-258 274.0511 -14.0340 2.6 19.3 159.6 1.9567 4.5 2.6 GX 17+2 276.0716 -30.3634 16.6 35.6 163.4 -0.4584 -0.7 7.6 H1820-303 284.8793 -24.9672 6.9 33.3 147.1 -1.1215 -1.7 9.0 HT1900.1-2455 288.6388 10.8973 16.0 20.0 64.0 0.3658 0.7 9.8 GRS 1915+105 299.5869 35.2059 1.6 41.3 31.6 5.8775 7.4 0.3 Cyg X-1 308.1963 40.9689 5.5 50.1 31.2 2.7774 2.1 4.0 Cyg X-3 262.8615 -33.7514 6.0 39.0 -178.1 -1.1944 -1.9 8.1 GX 354-0 303.9829 40.5874 3.1 47.4 29.0 3.2111 3.8 ------ UNKNOWN 277.7358 41.4926 2.2 37.5 3.4 3.0389 5.3 ------ UNKNOWN 260.0781 53.2567 2.9 49.1 -14.2 2.8579 3.9 ------ UNKNOWN 231.8826 41.9200 2.9 50.0 -43.1 6.9684 4.0 ------ UNKNOWN 229.6406 34.2168 2.9 47.2 -53.0 7.8967 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.596000 9.232000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0463 -15.7173 10.5 31.6 -137.5 0.0636 1.1 6.0 Sco X-1 254.6035 35.3815 12.9 33.6 -29.0 0.0498 0.9 7.5 Her X-1 256.1184 -37.8828 4.5 44.4 -171.7 -0.1904 -2.6 6.7 4U 1700-377 256.5713 -36.4327 8.3 42.9 -171.5 -0.0959 -1.4 6.6 GX 349+2 263.0264 -24.6915 55.1 30.1 -175.1 -0.0104 -0.2 3.4 GX 1+4 264.7134 -44.3998 5.2 49.3 177.6 -0.2284 -2.2 3.3 4U 1735-44 268.4003 -1.4182 4.5 6.2 -177.1 -0.1054 -2.6 2.8 SW J1753.5-0127 270.1178 -25.2148 0.0 29.9 172.0 0.0468 1.0 12.2 GX 5-1 270.4495 -25.7329 3.2 30.5 171.4 0.1714 3.6 8.0 GRS 1758-258 274.1492 -14.0724 14.5 19.4 159.3 -0.0359 -0.8 8.6 GX 17+2 275.7535 -30.5090 0.0 35.7 163.9 -0.0245 -0.4 12.3 H1820-303 285.0186 -24.8089 6.0 33.2 146.8 -0.1194 -1.9 6.8 HT1900.1-2455 288.7671 11.0968 57.9 20.2 63.6 0.0102 0.2 9.3 GRS 1915+105 299.5457 35.2484 14.0 41.3 31.6 -0.0723 -0.8 3.6 Cyg X-1 308.2098 40.7816 4.7 50.0 31.4 0.5281 2.5 11.2 Cyg X-3 262.8679 -33.7139 60.8 38.9 -178.1 -0.0120 -0.2 9.4 GX 354-0 268.8597 -20.2975 0.9 25.0 174.5 0.6075 12.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 73.916590 290.916590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9880 -15.6449 0.8 23.2 -83.4 6.9589 14.6 0.6 Sco X-1 254.4658 35.3044 11.6 57.3 -15.0 -1.4965 -1.0 2.3 Her X-1 256.0562 -37.7677 3.7 20.7 -151.3 1.2134 3.1 5.6 4U 1700-377 256.4181 -36.4745 3.4 19.5 -149.7 1.3322 3.4 3.2 GX 349+2 262.8431 -24.7636 6.2 7.1 -130.9 0.6834 1.9 9.1 GX 1+4 264.8960 -44.4631 8.5 24.4 -174.1 0.5879 1.4 6.6 4U 1735-44 268.5100 -1.4551 8.7 18.8 -2.2 0.5339 1.3 8.5 SW J1753.5-0127 270.3773 -25.1544 6.3 5.1 163.4 0.7782 2.0 6.8 GX 5-1 270.3351 -25.6769 5.2 5.5 165.3 1.0817 2.7 4.3 GRS 1758-258 273.9580 -13.9871 3.2 8.0 37.3 1.3878 3.6 4.1 GX 17+2 275.8021 -30.2714 12.2 11.8 148.3 0.3786 0.9 8.6 H1820-303 285.1884 -24.7757 14.9 15.7 108.6 -0.3674 -0.8 12.0 HT1900.1-2455 288.9193 11.0434 8.0 37.0 32.9 1.0512 1.4 9.2 GRS 1915+105 263.0438 -33.6882 14.0 14.4 -161.1 0.3176 0.8 9.2 GX 354-0 256.8735 -43.2844 3.1 25.1 -160.1 1.5451 3.7 ------ UNKNOWN 219.5852 -36.6327 2.1 45.7 -122.9 10.1443 5.6 ------ UNKNOWN 231.7984 7.1041 3.0 45.6 -57.9 7.4865 3.9 ------ UNKNOWN