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 11:46:01 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1111672
======================================================================
Trigger: 01111672 Segment: 000
BAT Trigger Time: 677660683.776 [s; MET]
Trigger Stop: 677660684.8 [s; MET]
UTC: 2022-06-23T07:04:14.406620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 145.462239057548 Dec: 75.8284740409551 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.9
Image Trigger?: NO
Rate S/N Ratio: 84.4985206971104 [ if not an image trigger ]
Image S/N Ratio: 18.9
Analysis Position: [ source = BAT ]
RA: 145.462239057548 Dec: 75.8284740409551 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 145.468106578395 Dec: 75.82314777064 [deg; J2000]
{ 09h 41m 52.3s , +75d 49' 23.3" }
+/- 0.844273294080949 [arcmin] (estimated 90% radius based on SNR)
+/- 0.231031888495376 [arcmin] (formal 1-sigma fit error)
SNR: 38.7384813716631
Angular difference between the analysis and refined position is 0.330999 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 56.7959998846054 +/- 4.03039509147759
Measured from: -3.26800000667572
to: 53.5279998779297 [s; relative to TRIGTIME]
T50: 23.675999879837 +/- 4.52679852854081
Measured from: 1.2960000038147
to: 24.9719998836517 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.148000001907349
to: 0.851999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.84399998188019
to: 73.7919999361038 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.485779 1.976161 1.667865 0.483371
0.058966 0.061473 0.055190 0.046972 [error]
Peak 0.130012 0.204529 0.201120 0.090111
0.008759 0.010652 0.010804 0.009081 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 77.636 -3.844 73.792
T90 56.796 -3.268 53.528
T50 23.676 1.296 24.972
Peak 1.000 -0.148 0.852
====== 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 -1.342 -0.068 0.068 - - - 4.62e-03 -1.61e-04 1.61e-04 54.780 57
CPL -1.342 -0.065 0.072 9999.360 -9999.360 -9999.360 4.63e-03 -1.53e-04 8.85e-04 54.830 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 -1.047 -0.103 0.104 - - - 3.89e-02 -2.12e-03 2.12e-03 90.080 57
CPL -1.043 -0.103 0.106 9999.010 -9999.010 -9999.010 3.92e-02 -2.13e-03 7.38e-03 90.190 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 3.95e-07 8.00e-07 1.26e-06 4.41e-06 3.51e-06 6.86e-06 erg/cm2
90%_error_low -2.79e-08 -3.25e-08 -5.53e-08 -4.37e-07 -1.35e-07 -4.68e-07 erg/cm2
90%_error_hi 2.87e-08 3.23e-08 5.51e-08 4.71e-07 1.36e-07 4.97e-07 erg/cm2
Peak flux PL 1.04e+00 1.37e+00 1.33e+00 2.29e+00 4.50e+00 6.03e+00 ph/cm2/s
90%_error_low -1.15e-01 -9.00e-02 -8.68e-02 -3.20e-01 -2.47e-01 -3.83e-01 ph/cm2/s
90%_error_hi 1.19e-01 8.90e-02 8.60e-02 3.53e-01 2.47e-01 3.94e-01 ph/cm2/s
Fluence CPL 3.95e-07 7.95e-07 1.25e-06 4.51e-06 3.53e-06 6.84e-06 erg/cm2
90%_error_low N/A N/A N/A -1.17e-06 N/A -9.71e-07 erg/cm2
90%_error_hi N/A N/A N/A -6.75e-08 N/A 2.56e-07 erg/cm2
Peak flux CPL 1.04e+00 1.37e+00 1.33e+00 2.52e+00 4.50e+00 6.05e+00 ph/cm2/s
90%_error_low -1.15e-01 -9.02e-02 -8.70e-02 N/A -2.45e-01 -4.73e-01 ph/cm2/s
90%_error_hi 1.19e-01 8.88e-02 8.61e-02 N/A 2.47e-01 3.44e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 145.4681 75.8231 0.0050 11.9844 41.0101 5.5486797 38.738 TRIG_01111672 Foreground time interval of the image: -3.844 73.792 (delta_t = 77.636 [sec]) Background time interval of the image: -293.776 -3.844 (delta_t = 289.932 [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 -3.844 sec. to 73.792 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.34235 ( -0.0681622 0.0682466 ) Norm@50keV : 4.61898E-03 ( -0.000160989 0.000160979 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.78 using 59 bins. Reduced chi-squared = 0.961053 # Null hypothesis probability of 5.59e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 77.64 sec: 0.555593 ( -0.020577 0.020645 ) ph/cm2/s Energy fluence (15-150 keV) : 3.50902e-06 ( -1.3517e-07 1.3563e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.844 sec. to 73.792 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.34232 ( -0.0663264 0.0713049 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 4.62836E-03 ( -0.000161484 0.000876617 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.83 using 59 bins. Reduced chi-squared = 0.979107 # Null hypothesis probability of 5.19e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 77.64 sec: 0.559488 ( ) ph/cm2/s Energy fluence (15-150 keV) : 3.5309e-06 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.148 sec. to 0.852 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.04678 ( -0.103454 0.104253 ) Norm@50keV : 3.89449E-02 ( -0.00211571 0.00211571 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 90.08 using 59 bins. Reduced chi-squared = 1.58035 # Null hypothesis probability of 3.42e-03 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 4.49692 ( -0.24657 0.24672 ) ph/cm2/s Energy fluence (15-150 keV) : 4.1441e-07 ( -2.66973e-08 2.6886e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.148 sec. to 0.852 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.04257 ( -0.103477 0.105644 ) Epeak [keV] : 9999.01 ( -9999.09 -9999.09 ) Norm@50keV : 3.91646E-02 ( -0.00212788 0.00738342 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 90.19 using 59 bins. Reduced chi-squared = 1.61054 # Null hypothesis probability of 2.56e-03 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 4.49570 ( -0.24479 0.24663 ) ph/cm2/s Energy fluence (15-150 keV) : 4.14171e-07 ( -2.67082e-08 2.68812e-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 = 1.601788840656498E-01, IMY = -1.392908094200087E-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: -293.776000 -3.844000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 154.5756 79.3917 3.6 16.0 40.9 1.2796 3.2 ------ UNKNOWN 122.1411 22.9811 3.6 42.2 -136.8 2.1218 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.844000 73.792000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 145.4681 75.8232 0.3 12.0 41.0 5.5487 38.7 ------ UNKNOWN 54.6769 59.6121 2.3 35.0 -32.9 0.8401 5.0 ------ UNKNOWN 37.1205 43.0816 2.7 54.6 -35.7 3.1410 4.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 260.924600 618.124680 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5777 -40.5553 2.6 48.7 166.2 7.5090 4.5 2.2 Vela X-1 120.7138 -14.3022 2.1 35.3 -154.0 3.2866 5.5 ------ UNKNOWN 119.8316 43.9287 2.3 45.6 -57.8 10.9346 5.0 ------ UNKNOWN