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 00:39:55 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1069788
======================================================================
Trigger: 01069788 Segment: 000
BAT Trigger Time: 651316725.76 [s; MET]
Trigger Stop: 651316725.888 [s; MET]
UTC: 2021-08-22T09:18:18.167540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 304.47624416316 Dec: 5.26505347483776 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.75
Image Trigger?: NO
Rate S/N Ratio: 157.565859246221 [ if not an image trigger ]
Image S/N Ratio: 18.75
Analysis Position: [ source = BAT ]
RA: 304.47624416316 Dec: 5.26505347483776 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 304.461317380082 Dec: 5.26528435689814 [deg; J2000]
{ 20h 17m 50.7s , +05d 15' 55.0" }
+/- 0.528399845286337 [arcmin] (estimated 90% radius based on SNR)
+/- 0.129632829285487 [arcmin] (formal 1-sigma fit error)
SNR: 75.6634217164567
Angular difference between the analysis and refined position is 0.891936 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 185.675999879837 +/- 46.6320496684671
Measured from: 0.25600004196167
to: 185.931999921799 [s; relative to TRIGTIME]
T50: 8.49199998378754 +/- 0.488262233614078
Measured from: 2.53999996185303
to: 11.0319999456406 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.00400006771087646
to: 1.00400006771088 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.363999962806702
to: 402.603999972343 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.394147 10.328298 9.027857 2.958630
0.146039 0.150357 0.133026 0.110703 [error]
Peak 0.579425 1.182879 1.284664 0.423638
0.018473 0.024564 0.026957 0.020274 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 402.968 -0.364 402.604
T90 185.676 0.256 185.932
T50 8.492 2.540 11.032
Peak 1.000 0.004 1.004
====== 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 -1.297 -0.038 0.038 - - - 4.96e-03 -9.63e-05 9.60e-05 47.400 57
CPL -1.251 -0.080 -0.002 999.673 -999.673 -999.673 5.18e-03 -2.96e-04 -1.06e-04 50.790 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 -0.991 -0.044 0.044 - - - 2.41e-01 -6.03e-03 6.02e-03 68.220 57
CPL -0.562 -0.182 0.190 198.155 -42.803 98.522 3.69e-01 -5.96e-02 7.40e-02 51.200 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 2.10e-06 4.38e-06 7.13e-06 2.61e-05 1.97e-05 3.97e-05 erg/cm2
90%_error_low -9.33e-08 -1.11e-07 -1.50e-07 -1.35e-06 -3.81e-07 -1.39e-06 erg/cm2
90%_error_hi 9.53e-08 1.11e-07 1.50e-07 1.40e-06 3.81e-07 1.43e-06 erg/cm2
Peak flux PL 6.10e+00 8.32e+00 8.37e+00 1.53e+01 2.77e+01 3.81e+01 ph/cm2/s
90%_error_low -3.14e-01 -2.61e-01 -2.27e-01 -8.87e-01 -7.05e-01 -1.05e+00 ph/cm2/s
90%_error_hi 3.21e-01 2.60e-01 2.26e-01 9.23e-01 7.06e-01 1.06e+00 ph/cm2/s
Fluence CPL 2.10e-06 4.38e-06 7.07e-06 2.75e-05 1.98e-05 3.82e-05 erg/cm2
90%_error_low -9.34e-08 -1.09e-07 -8.38e-08 N/A -4.78e-07 1.89e-07 erg/cm2
90%_error_hi 9.54e-08 1.14e-07 2.17e-07 N/A 2.83e-07 2.80e-06 erg/cm2
Peak flux CPL 5.40e+00 8.46e+00 8.81e+00 1.03e+01 2.72e+01 3.29e+01 ph/cm2/s
90%_error_low -4.08e-01 -2.77e-01 -2.91e-01 -1.51e+00 -7.34e-01 -1.69e+00 ph/cm2/s
90%_error_hi 4.17e-01 2.78e-01 2.93e-01 1.83e+00 7.34e-01 1.96e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 304.4613 5.2653 0.0025 24.3356 49.4761 18.9650989 75.663 TRIG_01069788 Foreground time interval of the image: -0.364 9.341 (delta_t = 9.705 [sec]) Background time interval of the image: -239.760 -0.364 (delta_t = 239.396 [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
Multiple GTIs in the spectrum tstart tstop -0.364000 134.234900 135.240000 402.604000 Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29656 ( -0.0383534 0.038475 ) Norm@50keV : 4.95665E-03 ( -9.62896e-05 9.60239e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 47.40 using 59 bins. Reduced chi-squared = 0.831579 # Null hypothesis probability of 8.14e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 402 sec: 0.590975 ( -0.013108 0.01316 ) ph/cm2/s Energy fluence (15-150 keV) : 1.97091e-05 ( -3.80649e-07 3.80765e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum tstart tstop -0.364000 134.234900 135.240000 402.604000 Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29239 ( -0.039136 0.0386185 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 4.97707E-03 ( -9.63281e-05 9.34535e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 47.70 using 59 bins. Reduced chi-squared = 0.851786 # Null hypothesis probability of 7.77e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 402 sec: 0.590761 ( -0.013104 0.013168 ) ph/cm2/s Energy fluence (15-150 keV) : 1.9801e-05 ( -4.77886e-07 2.83318e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.004 sec. to 1.004 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.990991 ( -0.0438857 0.0440298 ) Norm@50keV : 0.240860 ( -0.00602664 0.00602261 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 68.22 using 59 bins. Reduced chi-squared = 1.19684 # Null hypothesis probability of 1.47e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 27.7172 ( -0.7053 0.7057 ) ph/cm2/s Energy fluence (15-150 keV) : 2.61318e-06 ( -7.11539e-08 7.12371e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 1.004 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.562384 ( -0.181999 0.189764 ) Epeak [keV] : 198.155 ( -42.8029 98.5218 ) Norm@50keV : 0.368779 ( -0.0595513 0.0740188 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.20 using 59 bins. Reduced chi-squared = 0.914286 # Null hypothesis probability of 6.57e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 27.2032 ( -0.7339 0.7344 ) ph/cm2/s Energy fluence (15-150 keV) : 2.5672e-06 ( -7.51887e-08 7.49654e-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 = 2.938665141621376E-01, IMY = -3.437827128703871E-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: -239.760000 -0.364000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9526 -15.6088 1.0 38.8 -114.5 6.9869 12.0 2.4 Sco X-1 254.5714 35.3469 10.4 51.1 -39.9 1.2700 1.1 5.6 Her X-1 255.9766 -37.8451 8.1 39.3 -153.5 0.6670 1.4 0.5 4U 1700-377 256.5812 -36.3192 7.4 37.9 -152.2 0.6595 1.5 9.4 GX 349+2 262.9210 -24.7710 6.6 26.3 -142.1 0.4747 1.8 5.0 GX 1+4 264.6492 -44.5837 5.5 40.5 -168.0 0.8122 2.1 9.0 4U 1735-44 268.4893 -1.6161 70.9 16.4 -78.2 -0.0467 -0.2 12.2 SW J1753.5-0127 270.1878 -25.1051 10.0 21.8 -154.0 0.3165 1.2 5.5 GX 5-1 270.3528 -25.6569 3.7 22.1 -155.2 0.8998 3.3 5.8 GRS 1758-258 274.1534 -14.0793 9.5 11.4 -134.1 0.2994 1.2 9.0 GX 17+2 275.7957 -30.3306 4.3 23.9 -171.8 0.6927 2.7 7.0 H1820-303 285.0351 -24.9216 524.1 17.3 167.1 -0.0059 -0.0 0.1 HT1900.1-2455 288.8021 11.0969 5.8 19.4 5.9 -0.5101 -2.0 9.1 GRS 1915+105 299.6435 35.1865 0.8 45.4 9.2 7.1053 15.0 2.8 Cyg X-1 308.0813 40.9973 5.4 53.5 13.6 -2.1579 -2.2 3.0 Cyg X-3 262.8313 -33.8210 5.1 32.5 -155.5 -0.7468 -2.3 7.9 GX 354-0 308.1132 37.6621 2.7 50.7 15.9 2.9985 4.2 ------ UNKNOWN 255.7205 -60.7931 3.2 57.1 -173.2 4.0976 3.6 ------ UNKNOWN 266.7868 -15.1125 3.4 18.2 -124.7 0.9629 3.5 ------ UNKNOWN 278.2124 42.6019 2.0 50.5 -14.4 3.1244 5.9 ------ UNKNOWN 238.6895 -55.4330 4.0 59.6 -161.3 7.0220 2.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.364000 9.340600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1210 -15.5663 224.1 38.6 -114.5 0.0222 0.1 9.3 Sco X-1 254.5060 35.4785 14.7 51.2 -39.8 0.7681 0.8 8.5 Her X-1 256.1138 -37.9514 5.7 39.3 -153.7 -0.6284 -2.0 8.8 4U 1700-377 256.3653 -36.4416 5.6 38.1 -152.2 0.6210 2.0 3.6 GX 349+2 263.1239 -24.9313 0.0 26.2 -142.7 0.5214 2.3 12.8 GX 1+4 264.9086 -44.4561 7.2 40.3 -168.2 -0.5085 -1.6 7.1 4U 1735-44 268.1984 -1.5420 7.5 16.7 -78.4 0.3373 1.5 11.5 SW J1753.5-0127 270.4281 -25.1491 9.1 21.7 -154.5 0.2755 1.3 8.9 GX 5-1 270.1719 -25.6129 8.2 22.2 -154.8 -0.3413 -1.6 10.5 GRS 1758-258 274.0115 -14.1890 11.7 11.6 -134.2 -0.1945 -1.0 9.2 GX 17+2 276.1040 -30.2921 11.1 23.8 -172.4 0.2409 1.0 10.3 H1820-303 284.8970 -24.8023 20.5 17.2 167.5 0.1204 0.6 10.4 HT1900.1-2455 288.8994 10.9743 20.5 19.3 6.3 -0.1230 -0.6 6.2 GRS 1915+105 299.6056 35.3530 12.3 45.5 9.1 -0.4011 -0.9 9.1 Cyg X-1 307.9804 40.9251 4.3 53.4 13.6 2.3164 2.7 6.1 Cyg X-3 262.8239 -33.8708 17.4 32.6 -155.6 -0.1674 -0.7 8.5 GX 354-0 310.0510 38.1361 2.0 51.9 17.2 3.9407 5.6 ------ UNKNOWN 304.4613 5.2653 0.2 24.3 49.5 18.9652 75.7 ------ UNKNOWN 238.8806 -21.1673 3.3 45.4 -121.4 2.9849 3.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 63.140600 134.234900 135.240000 520.099400 522.240000 584.215000 585.240000 612.852600 615.240000 899.653800 921.240000 962.360600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 263.0189 -24.7595 4.4 50.3 -160.5 6.3036 2.6 1.0 GX 1+4 268.3748 -1.4436 160.6 36.7 -131.5 -0.1027 -0.1 0.7 SW J1753.5-0127 270.3254 -25.0906 4.1 45.0 -165.9 4.7119 2.8 2.3 GX 5-1 270.3117 -25.8593 3.3 45.5 -166.8 6.2244 3.5 7.0 GRS 1758-258 274.0214 -13.9733 3.2 35.8 -154.7 3.8992 3.6 3.9 GX 17+2 275.8589 -30.2655 6.5 44.9 -176.0 2.7897 1.8 7.0 H1820-303 284.9950 -24.9339 7.3 35.7 179.3 1.7551 1.6 2.4 HT1900.1-2455 288.9791 10.9558 9.5 16.3 -100.6 1.0330 1.2 10.7 GRS 1915+105 299.5845 35.1982 0.4 30.2 -39.8 27.6428 26.3 0.3 Cyg X-1 308.3543 40.9782 7.1 35.9 -26.9 1.8685 1.6 11.2 Cyg X-3 326.1675 38.2217 6.1 38.4 -4.0 2.6629 1.9 6.0 Cyg X-2 262.9973 -33.8544 1867.9 55.4 -170.0 0.0177 0.0 1.2 GX 354-0 351.0870 11.0563 4.0 46.5 47.9 10.3643 2.9 ------ UNKNOWN 353.8351 19.5900 3.6 50.1 36.9 16.0074 3.2 ------ UNKNOWN 299.8488 -40.9831 3.7 46.5 152.9 8.6839 3.1 ------ UNKNOWN 304.4678 5.2787 1.8 0.0 114.4 5.6990 6.5 ------ UNKNOWN 272.0228 -31.2130 2.6 47.9 -173.7 7.5265 4.5 ------ UNKNOWN 298.4130 11.2799 4.7 8.5 -76.5 1.7928 2.5 ------ UNKNOWN 289.6963 7.8290 2.4 14.9 -111.3 3.7368 4.8 ------ UNKNOWN 308.0697 37.6346 0.8 32.5 -26.6 14.7214 14.0 ------ UNKNOWN 281.1001 -1.9721 2.6 24.4 -138.6 3.9042 4.4 ------ UNKNOWN