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 00:43:37 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1069169
======================================================================
Trigger: 01069169 Segment: 000
BAT Trigger Time: 650941355.764 [s; MET]
Trigger Stop: 650941355.828 [s; MET]
UTC: 2021-08-18T01:02:08.196640 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 149.131388407691 Dec: -87.0315890774405 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.11
Image Trigger?: NO
Rate S/N Ratio: 96.4779767615387 [ if not an image trigger ]
Image S/N Ratio: 9.11
Analysis Position: [ source = BAT ]
RA: 149.131388407691 Dec: -87.0315890774405 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 148.945138048474 Dec: -87.0293546195953 [deg; J2000]
{ 09h 55m 46.8s , -87d 01' 45.7" }
+/- 0.480171292478529 [arcmin] (estimated 90% radius based on SNR)
+/- 0.151994301457393 [arcmin] (formal 1-sigma fit error)
SNR: 86.7494395053673
Angular difference between the analysis and refined position is 0.594241 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 73.5599999427795 +/- 1.60419951668982
Measured from: 1.66799998283386
to: 75.2279999256134 [s; relative to TRIGTIME]
T50: 32.2759999036789 +/- 0.520999059636014
Measured from: 9.37199997901917
to: 41.6479998826981 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.19599997997284
to: 2.19599997997284 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.688000082969666
to: 129.043999910355 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.272668 13.665817 12.193476 4.122670
0.086746 0.095001 0.090114 0.076836 [error]
Peak 0.226309 0.460371 0.558132 0.252321
0.010662 0.013942 0.015751 0.014367 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 129.732 -0.688 129.044
T90 73.560 1.668 75.228
T50 32.276 9.372 41.648
Peak 1.000 1.196 2.196
====== 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 -1.215 -0.026 0.026 - - - 1.98e-02 -2.81e-04 2.80e-04 47.960 57
CPL -1.161 -0.076 -0.022 996.594 -996.594 -996.594 2.08e-02 -1.17e-03 -6.39e-04 56.450 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 -0.733 -0.061 0.062 - - - 9.67e-02 -3.23e-03 3.22e-03 62.650 57
CPL -0.726 -0.061 0.063 9999.170 -9999.170 -9999.170 9.75e-02 -3.21e-03 1.24e-02 62.780 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 2.51e-06 5.49e-06 9.46e-06 3.78e-05 2.59e-05 5.52e-05 erg/cm2
90%_error_low -8.22e-08 -1.06e-07 -1.27e-07 -1.26e-06 -3.33e-07 -1.26e-06 erg/cm2
90%_error_hi 8.35e-08 1.06e-07 1.26e-07 1.29e-06 3.33e-07 1.28e-06 erg/cm2
Peak flux PL 1.92e+00 3.06e+00 3.68e+00 8.66e+00 1.12e+01 1.73e+01 ph/cm2/s
90%_error_low -1.41e-01 -1.35e-01 -1.27e-01 -6.75e-01 -3.61e-01 -7.11e-01 ph/cm2/s
90%_error_hi 1.45e-01 1.34e-01 1.26e-01 7.14e-01 3.62e-01 7.30e-01 ph/cm2/s
Fluence CPL 2.50e-06 5.50e-06 9.37e-06 3.97e-05 2.60e-05 5.29e-05 erg/cm2
90%_error_low -8.23e-08 N/A -2.67e-08 N/A -4.33e-07 N/A erg/cm2
90%_error_hi 8.36e-08 N/A 2.27e-07 N/A 2.32e-07 N/A erg/cm2
Peak flux CPL 1.89e-01 1.76e-04 6.73e-03 5.40e+00 5.17e-02 5.41e+00 ph/cm2/s
90%_error_low -1.89e-01 -1.76e-04 -6.73e-03 -5.40e+00 -5.17e-02 -5.41e+00 ph/cm2/s
90%_error_hi 2.63e-01 8.03e-04 9.92e-03 5.67e+00 1.03e-01 4.29e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 148.9451 -87.0294 0.0022 17.5998 9.3842 9.7062994 86.749 TRIG_01069169 Foreground time interval of the image: -0.688 9.137 (delta_t = 9.825 [sec]) Background time interval of the image: -239.764 -0.688 (delta_t = 239.076 [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 -0.688 sec. to 129.044 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.21467 ( -0.026152 0.0262563 ) Norm@50keV : 1.97727E-02 ( -0.00028093 0.000279583 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 47.96 using 59 bins. Reduced chi-squared = 0.841404 # Null hypothesis probability of 7.98e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 129.7 sec: 2.32583 ( -0.03754 0.03783 ) ph/cm2/s Energy fluence (15-150 keV) : 2.59143e-05 ( -3.33175e-07 3.33303e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.688 sec. to 129.044 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20969 ( -0.0292208 0.0241601 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 1.98632E-02 ( -0.000280598 0.000254421 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 48.69 using 59 bins. Reduced chi-squared = 0.869464 # Null hypothesis probability of 7.45e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 129.7 sec: 1.19807 ( -0.07586 0.08115 ) ph/cm2/s Energy fluence (15-150 keV) : 2.60087e-05 ( -4.32897e-07 2.3163e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.196 sec. to 2.196 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.733085 ( -0.061079 0.0616865 ) Norm@50keV : 9.67342E-02 ( -0.00323446 0.00321871 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.65 using 59 bins. Reduced chi-squared = 1.09912 # Null hypothesis probability of 2.83e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 11.1550 ( -0.3615 0.3617 ) ph/cm2/s Energy fluence (15-150 keV) : 1.16359e-06 ( -4.23205e-08 4.24452e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.196 sec. to 2.196 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.726244 ( -0.060844 0.0629117 ) Epeak [keV] : 9999.17 ( -9999.28 -9999.28 ) Norm@50keV : 9.74724E-02 ( -0.00320398 0.0123974 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.78 using 59 bins. Reduced chi-squared = 1.12107 # Null hypothesis probability of 2.49e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 5.17409E-02 ( -0.0517409 0.103378 ) ph/cm2/s Energy fluence (15-150 keV) : 1.16915e-06 ( -4.8371e-08 3.63855e-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 = 3.129689356339096E-01, IMY = -5.172311293449179E-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: -239.764000 -0.688000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.1409 -60.6253 2.7 34.9 -40.3 1.3845 4.3 5.1 Cen X-3 186.7055 -62.6155 63.7 37.3 -27.1 -0.0644 -0.2 9.4 GX 301-2 26.8144 -34.6540 2.5 45.3 135.0 4.9730 4.6 ------ UNKNOWN 173.1466 -69.8485 2.3 28.3 -27.6 1.3566 5.0 ------ UNKNOWN 79.9833 -14.0015 2.8 57.7 -158.6 5.3444 4.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.688000 9.136600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.4940 -60.4687 0.0 35.1 -40.2 0.3906 2.4 10.6 Cen X-3 186.9697 -62.7188 136.9 37.3 -26.9 -0.0137 -0.1 9.1 GX 301-2 25.4776 -43.4424 2.3 37.5 128.6 1.3961 4.9 ------ UNKNOWN 44.1316 -28.0545 2.2 47.3 157.3 1.7855 5.2 ------ UNKNOWN 276.2072 -68.7389 2.2 39.1 29.3 1.1000 5.3 ------ UNKNOWN 55.6491 -82.4281 2.4 11.6 32.9 0.5134 4.7 ------ UNKNOWN 148.9451 -87.0294 0.1 17.6 9.4 9.7063 86.7 ------ UNKNOWN 199.0465 -72.8303 2.4 30.8 -10.7 0.6119 4.7 ------ UNKNOWN 71.2248 -35.2610 2.4 36.6 -170.0 0.7181 4.8 ------ UNKNOWN 202.3256 -57.1202 1.9 45.6 -19.9 1.2711 6.2 ------ UNKNOWN 83.5600 -33.5296 2.3 38.3 -153.3 0.8152 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 48.136600 962.365800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3096 -60.6608 2.8 26.6 -65.0 4.5965 4.1 2.3 Cen X-3 187.1199 -62.7931 0.0 24.9 -46.4 -1.7846 -2.0 12.8 GX 301-2 256.0606 -37.8384 5.2 53.1 20.8 7.6194 2.2 3.5 4U 1700-377 256.4317 -36.4258 78.8 54.5 21.0 0.6388 0.1 0.2 GX 349+2 264.9322 -44.4375 12.0 46.9 30.0 -1.9075 -1.0 8.1 4U 1735-44 307.1107 -52.6760 3.4 40.1 71.0 9.6477 3.5 ------ UNKNOWN 27.8886 -42.3191 3.4 49.3 148.2 10.8879 3.4 ------ UNKNOWN 34.6163 -37.6351 3.3 53.7 155.2 16.0339 3.5 ------ UNKNOWN 246.7144 -34.8392 5.4 55.6 11.3 8.4138 2.1 ------ UNKNOWN 149.5553 -87.0374 1.0 0.0 39.8 8.8477 12.0 ------ UNKNOWN 157.7259 -78.6619 3.8 8.4 -76.8 2.0599 3.1 ------ UNKNOWN 217.9650 -29.5525 3.5 59.4 -17.9 14.9604 3.3 ------ UNKNOWN 81.7920 -34.4842 2.5 54.4 -157.6 12.9603 4.5 ------ UNKNOWN 210.2548 -34.4449 2.2 54.2 -25.3 14.2791 5.2 ------ UNKNOWN