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: Sun Nov 13 11:41:13 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1031636
======================================================================
Trigger: 01031636 Segment: 000
BAT Trigger Time: 634599611.008 [s; MET]
Trigger Stop: 634599623.168 [s; MET]
UTC: 2021-02-09T21:39:44.528860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 328.09639350866 Dec: 43.5587284402821 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.25
Image Trigger?: NO
Rate S/N Ratio: 10.816653826392 [ if not an image trigger ]
Image S/N Ratio: 10.25
Analysis Position: [ source = BAT ]
RA: 328.09639350866 Dec: 43.5587284402821 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 328.096909876726 Dec: 43.5445563657356 [deg; J2000]
{ 21h 52m 23.3s , +43d 32' 40.4" }
+/- 1.55216785536005 [arcmin] (estimated 90% radius based on SNR)
+/- 0.603615658455308 [arcmin] (formal 1-sigma fit error)
SNR: 16.2311327503271
Angular difference between the analysis and refined position is 0.850621 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 139.407999992371 +/- 21.5133887433406
Measured from: -24.1240000724792
to: 115.283999919891 [s; relative to TRIGTIME]
T50: 70 +/- 6.48419902027476
Measured from: 4.10399997234344
to: 74.1039999723434 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.68400001525879
to: 3.68400001525879 [s; relative to TRIGTIME]
Total Fluence
Measured from: -40.3359999656677
to: 134.715999960899 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.048811 1.469605 1.083165 0.299598
0.081799 0.083668 0.074208 0.067354 [error]
Peak 0.022781 0.021681 0.019738 0.010527
0.006252 0.006594 0.005778 0.005399 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 175.052 -40.336 134.716
T90 139.408 -24.124 115.284
T50 70.000 4.104 74.104
Peak 1.000 2.684 3.684
====== 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 -1.512 -0.123 0.122 - - - 1.42e-03 -9.57e-05 9.52e-05 51.470 57
CPL -1.513 -0.121 0.144 9999.340 -9999.340 -9999.340 1.42e-03 -9.26e-05 5.64e-04 51.480 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 -1.415 -0.581 0.569 - - - 4.82e-03 -1.34e-03 1.26e-03 50.120 57
CPL -1.438 -6.633 -1.064 9999.360 -9357.780 -9153.287 4.82e-03 -4.82e-03 -3.33e-03 50.140 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 3.21e-07 5.86e-07 8.22e-07 2.41e-06 2.35e-06 4.14e-06 erg/cm2
90%_error_low -3.66e-08 -4.00e-08 -7.42e-08 -4.46e-07 -1.75e-07 -5.06e-07 erg/cm2
90%_error_hi 3.78e-08 3.98e-08 7.41e-08 5.14e-07 1.77e-07 5.62e-07 erg/cm2
Peak flux PL 1.83e-01 1.94e-01 1.45e-01 1.77e-01 5.90e-01 6.99e-01 ph/cm2/s
90%_error_low -8.71e-02 -5.76e-02 -5.44e-02 -1.09e-01 -1.53e-01 -1.86e-01 ph/cm2/s
90%_error_hi 9.94e-02 5.34e-02 5.04e-02 1.90e-01 1.53e-01 1.95e-01 ph/cm2/s
Fluence CPL 3.24e-07 5.82e-07 8.17e-07 2.53e-06 2.38e-06 4.03e-06 erg/cm2
90%_error_low -4.63e-08 -4.39e-08 -6.94e-08 -1.05e-06 -2.06e-07 -8.64e-07 erg/cm2
90%_error_hi 4.08e-08 7.71e-08 7.91e-08 1.36e-07 1.45e-07 6.58e-07 erg/cm2
Peak flux CPL 1.50e-01 8.10e-03 1.47e-04 3.12e-06 1.60e-01 1.61e-01 ph/cm2/s
90%_error_low -9.86e-02 -8.10e-03 -1.47e-04 -3.12e-06 -1.11e-01 -1.26e-01 ph/cm2/s
90%_error_hi 1.15e-01 9.73e-02 3.85e-02 2.39e-02 1.90e-01 1.84e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 328.0969 43.5446 0.0119 21.5099 -11.1749 2.2510730 16.231 TRIG_01031636 Foreground time interval of the image: -40.336 57.293 (delta_t = 97.629 [sec]) Background time interval of the image: -239.008 -40.336 (delta_t = 198.672 [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 -40.336 sec. to 134.716 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.51184 ( -0.12302 0.122282 ) Norm@50keV : 1.42022E-03 ( -9.56811e-05 9.51783e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.47 using 59 bins. Reduced chi-squared = 0.902982 # Null hypothesis probability of 6.82e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 175.1 sec: 0.177875 ( -0.0118 0.011821 ) ph/cm2/s Energy fluence (15-150 keV) : 2.35492e-06 ( -1.75273e-07 1.76919e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.336 sec. to 134.716 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.51258 ( -0.120929 0.143437 ) Epeak [keV] : 9999.34 ( -9999.36 -9999.36 ) Norm@50keV : 1.42175E-03 ( -9.45419e-05 0.000562465 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.48 using 59 bins. Reduced chi-squared = 0.919286 # Null hypothesis probability of 6.46e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 175.1 sec: 0.178598 ( ) ph/cm2/s Energy fluence (15-150 keV) : 2.3829e-06 ( -2.05562e-07 1.45443e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.684 sec. to 3.684 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.41541 ( -0.581881 0.568426 ) Norm@50keV : 4.82449E-03 ( -0.0013358 0.00126298 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 50.12 using 59 bins. Reduced chi-squared = 0.879298 # Null hypothesis probability of 7.29e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.589598 ( -0.152693 0.152804 ) ph/cm2/s Energy fluence (15-150 keV) : 4.64879e-08 ( -1.43557e-08 1.46879e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.684 sec. to 3.684 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -6.72769 ( -1.33178 4.23791 ) Epeak [keV] : 707.136 ( -66.8945 137.599 ) Norm@50keV : 1.65726E-05 ( -1.59042e-05 0.00147647 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 45.09 using 59 bins. Reduced chi-squared = 0.805179 # Null hypothesis probability of 8.52e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.159947 ( -0.110981 0.190297 ) ph/cm2/s Energy fluence (15-150 keV) : 2.07783e-08 ( -1.93519e-08 -2.8479e-09 ) 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 = 3.866379967327187E-01, IMY = 7.638013210396750E-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: -239.008000 -40.336000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.6700 35.2188 7.0 44.0 -23.2 0.6670 1.7 4.0 Cyg X-1 308.1340 40.9215 3.0 36.2 -17.0 1.1080 3.9 2.2 Cyg X-3 326.3936 38.3698 7.5 22.5 -25.2 0.3328 1.5 10.8 Cyg X-2 49.0542 53.8735 2.8 40.9 98.3 3.5933 4.2 ------ UNKNOWN 6.5704 59.5820 2.1 24.4 65.8 1.4445 5.5 ------ UNKNOWN 291.1540 46.0216 3.4 47.5 -6.3 1.3583 3.4 ------ UNKNOWN 281.8817 31.5664 2.8 59.1 -20.3 5.2325 4.2 ------ UNKNOWN 289.2255 26.9215 2.5 55.5 -28.6 4.9179 4.6 ------ UNKNOWN 8.5269 -17.1807 3.6 55.2 -144.9 4.9061 3.2 ------ UNKNOWN 312.8099 12.5076 2.9 44.5 -60.2 3.6711 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -40.336000 57.292580 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.4233 35.3493 7.3 44.2 -22.9 0.4013 1.6 12.1 Cyg X-1 307.9276 40.8562 13.0 36.4 -17.1 -0.1676 -0.9 10.1 Cyg X-3 326.3542 38.2832 10.4 22.6 -25.4 -0.1644 -1.1 8.9 Cyg X-2 22.5569 76.9688 2.1 42.4 60.2 3.5509 5.6 ------ UNKNOWN 328.0969 43.5445 0.7 21.5 -11.2 2.2511 16.2 ------ UNKNOWN 9.9121 3.5718 2.1 35.7 -155.3 0.9959 5.6 ------ UNKNOWN 354.0995 0.2152 2.6 36.2 -127.7 1.0314 4.5 354.3 UNKNOWN 11.9137 -12.7231 2.6 51.7 -150.3 1.8355 4.5 ------ UNKNOWN 304.3752 16.5537 2.4 48.6 -49.0 3.2107 4.9 ------ UNKNOWN 318.0001 9.5979 2.1 42.7 -68.3 2.9940 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 105.492600 963.008800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3073 35.2747 6.5 55.7 13.7 -7.5552 -2.0 8.4 Her X-1 288.8953 10.9280 7.8 47.0 -36.7 2.1227 1.5 5.8 GRS 1915+105 299.6022 35.1959 1.0 23.4 -16.0 7.4406 12.0 0.7 Cyg X-1 308.1126 40.9803 1.9 15.0 -7.8 4.5811 6.2 1.7 Cyg X-3 326.1356 38.3106 4.7 5.4 -78.5 1.4511 2.5 1.8 Cyg X-2 40.1011 42.2262 3.1 51.0 150.1 10.5043 3.8 ------ UNKNOWN 252.3531 37.6089 3.3 55.8 17.1 11.0991 3.5 ------ UNKNOWN