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 12:17:31 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1131029
======================================================================
Trigger: 01131029 Segment: 000
BAT Trigger Time: 688309257.216 [s; MET]
Trigger Stop: 688309261.312 [s; MET]
UTC: 2022-10-24T13:00:27.123520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 169.71820537361 Dec: 33.041010097512 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.22
Image Trigger?: NO
Rate S/N Ratio: 14.3178210632764 [ if not an image trigger ]
Image S/N Ratio: 10.22
Analysis Position: [ source = BAT ]
RA: 169.71820537361 Dec: 33.041010097512 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 169.70305184754 Dec: 33.0775693082221 [deg; J2000]
{ 11h 18m 48.7s , +33d 04' 39.2" }
+/- 2.90213383438735 [arcmin] (estimated 90% radius based on SNR)
+/- 1.41124149618613 [arcmin] (formal 1-sigma fit error)
SNR: 6.63885939538054
Angular difference between the analysis and refined position is 2.322142 arcmin
Partial Coding Fraction: 0.359375 [ including projection effects ]
Duration
T90: 122.175999879837 +/- 108.862343397387
Measured from: 0.28000009059906
to: 122.455999970436 [s; relative to TRIGTIME]
T50: 104.34399998188 +/- 214.003629602711
Measured from: 2.67599999904633
to: 107.019999980927 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.70000004768372
to: 3.70000004768372 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.00400006771087646
to: 221.276000022888 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.405574 0.910407 0.736447 0.194082
0.112993 0.117692 0.104302 0.090791 [error]
Peak 0.047639 0.069821 0.051363 0.023700
0.011890 0.013638 0.012344 0.009952 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 221.272 0.004 221.276
T90 122.176 0.280 122.456
T50 104.344 2.676 107.020
Peak 1.000 2.700 3.700
====== 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: PL)
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 -1.343 -0.245 0.246 - - - 7.06e-04 -1.03e-04 1.03e-04 53.620 57
CPL -0.409 -1.023 1.434 88.291 -25.247 -88.291 2.01e-03 -2.01e-03 7.31e-03 51.490 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
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 -1.462 -0.338 0.329 - - - 1.23e-02 -2.65e-03 2.62e-03 53.230 57
CPL -0.740 -0.983 1.614 88.221 -35.996 -88.221 2.87e-02 -2.87e-02 1.63e-01 52.180 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 1.72e-07 3.48e-07 5.50e-07 1.92e-06 1.53e-06 2.99e-06 erg/cm2
90%_error_low -4.23e-08 -5.52e-08 -9.97e-08 -6.52e-07 -2.46e-07 -7.40e-07 erg/cm2
90%_error_hi 4.52e-08 5.44e-08 9.87e-08 8.48e-07 2.49e-07 9.03e-07 erg/cm2
Peak flux PL 4.88e-01 5.02e-01 3.64e-01 4.24e-01 1.52e+00 1.78e+00 ph/cm2/s
90%_error_low -1.57e-01 -1.12e-01 -9.55e-02 -1.84e-01 -3.21e-01 -3.79e-01 ph/cm2/s
90%_error_hi 1.70e-01 1.10e-01 9.38e-02 2.46e-01 3.22e-01 3.83e-01 ph/cm2/s
Fluence CPL 1.44e-07 3.79e-07 5.87e-07 6.19e-07 1.44e-06 1.73e-06 erg/cm2
90%_error_low -5.36e-08 -6.66e-08 -1.14e-07 -4.21e-07 -2.67e-07 -4.97e-07 erg/cm2
90%_error_hi 5.55e-08 6.98e-08 1.17e-07 1.54e-06 2.72e-07 8.63e-07 erg/cm2
Peak flux CPL 4.33e-01 5.44e-01 3.93e-01 2.08e-01 1.50e+00 1.58e+00 ph/cm2/s
90%_error_low -1.80e-01 -1.32e-01 -1.09e-01 -2.08e-01 -3.23e-01 -3.71e-01 ph/cm2/s
90%_error_hi 1.91e-01 1.43e-01 1.15e-01 3.04e-01 3.24e-01 4.77e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 169.7031 33.0776 0.0288 34.4709 -128.6459 0.9105759 6.639 TRIG_01131029 Foreground time interval of the image: 0.004 34.285 (delta_t = 34.281 [sec]) Background time interval of the image: -239.216 0.004 (delta_t = 239.220 [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 0.004 sec. to 221.276 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.34262 ( -0.245201 0.246067 ) Norm@50keV : 7.06008E-04 ( -0.000103213 0.000103015 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 53.62 using 59 bins. Reduced chi-squared = 0.940702 # Null hypothesis probability of 6.03e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 221.3 sec: 8.49268E-02 ( -0.0125936 0.0126226 ) ph/cm2/s Energy fluence (15-150 keV) : 1.5287e-06 ( -2.46125e-07 2.49016e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.004 sec. to 221.276 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.408765 ( -1.0229 1.43447 ) Epeak [keV] : 88.2914 ( -25.247 -88.2909 ) Norm@50keV : 2.01474E-03 ( -0.00201477 0.00731223 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 51.49 using 59 bins. Reduced chi-squared = 0.919464 # Null hypothesis probability of 6.46e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 221.3 sec: 8.15866E-02 ( -0.0133879 0.0132805 ) ph/cm2/s Energy fluence (15-150 keV) : 1.43698e-06 ( -2.66697e-07 2.72133e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.700 sec. to 3.700 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.46209 ( -0.338506 0.328875 ) Norm@50keV : 1.22886E-02 ( -0.00264768 0.00262325 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 53.23 using 59 bins. Reduced chi-squared = 0.93386 # Null hypothesis probability of 6.17e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.51903 ( -0.32122 0.32164 ) ph/cm2/s Energy fluence (15-150 keV) : 1.17352e-07 ( -2.72717e-08 2.75919e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.700 sec. to 3.700 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.739921 ( -0.982628 1.61413 ) Epeak [keV] : 88.2207 ( -35.9963 -88.2209 ) Norm@50keV : 2.87173E-02 ( -0.0287171 0.162949 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 52.18 using 59 bins. Reduced chi-squared = 0.931786 # Null hypothesis probability of 6.20e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.49873 ( -0.32349 0.32371 ) ph/cm2/s Energy fluence (15-150 keV) : 1.13616e-07 ( -2.86686e-08 2.87152e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 122.176 sec. Hardness ratio (energy fluence ratio) = 1.57724804001
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 5.205701e-07 S(50-150 keV) = 1.0081124e-06
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 = -4.287429109351291E-01, IMY = 5.361960943195506E-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: -239.216000 0.004000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 146.9700 39.8205 2.2 22.7 -162.0 2.8094 5.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.004000 34.284600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 97.1478 -3.6116 2.6 43.0 51.4 0.9496 4.4 ------ UNKNOWN 114.8044 -27.0768 2.6 50.7 12.8 0.8185 4.4 ------ UNKNOWN 191.7987 63.1926 2.1 57.9 -162.3 2.5133 5.6 ------ UNKNOWN 169.7030 33.0776 1.7 34.5 -128.6 0.9105 6.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 112.084600 962.818100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 140.4381 68.5643 2.4 39.2 120.4 28.6656 4.8 ------ UNKNOWN 222.9563 72.5871 2.7 47.9 155.7 30.7810 4.3 ------ UNKNOWN 163.4846 45.4527 3.2 13.3 117.6 7.0279 3.6 ------ UNKNOWN