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: Fri Sep 29 23:26:07 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1186032
======================================================================
Trigger: 01186032 Segment: 000
BAT Trigger Time: 714094086.208 [s; MET]
Trigger Stop: 714094086.72 [s; MET]
UTC: 2023-08-18T23:27:34.357180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 285.882942578261 Dec: 40.8763661027751 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.15
Image Trigger?: NO
Rate S/N Ratio: 10.6301458127346 [ if not an image trigger ]
Image S/N Ratio: 9.15
Analysis Position: [ source = BAT ]
RA: 285.882942578261 Dec: 40.8763661027751 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 285.886890595235 Dec: 40.8865418305054 [deg; J2000]
{ 19h 03m 32.9s , +40d 53' 11.6" }
+/- 1.1576555341716 [arcmin] (estimated 90% radius based on SNR)
+/- 0.416357918680518 [arcmin] (formal 1-sigma fit error)
SNR: 24.6769075422566
Angular difference between the analysis and refined position is 0.636270 arcmin
Partial Coding Fraction: 0.3242188 [ including projection effects ]
Duration
T90: 64 +/- 35.7770876399966
Measured from: 0.79200005531311
to: 64.7920000553131 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.79200005531311
to: 16.7920000553131 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.29200005531311
to: 9.29200005531311 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.79200005531311
to: 80.7920000553131 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.691922 1.184709 0.913304 0.317926
0.086265 0.089735 0.078232 0.065787 [error]
Peak 0.012076 0.033837 0.005497 0.010404
0.012142 0.013203 0.011934 0.009939 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 80.000 0.792 80.792
T90 64.000 0.792 64.792
T50 16.000 0.792 16.792
Peak 1.000 8.292 9.292
====== 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 -1.428 -0.145 0.146 - - - 2.80e-03 -2.33e-04 2.33e-04 55.170 57
CPL -1.270 -0.287 0.594 246.426 -246.426 -246.426 3.34e-03 -9.88e-04 3.00e-03 54.920 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 -1.977 -3.018 1.351 - - - 2.82e-03 -2.82e-03 2.67e-03 79.650 57
CPL 9.103 -8.127 -9.103 46.966 -9.576 10.611 1.19e+03 -1.19e+03 3.87e+04 75.160 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 2.67e-07 5.13e-07 7.64e-07 2.44e-06 2.15e-06 3.99e-06 erg/cm2
90%_error_low -4.09e-08 -4.87e-08 -7.69e-08 -4.99e-07 -1.90e-07 -5.56e-07 erg/cm2
90%_error_hi 4.28e-08 4.82e-08 7.62e-08 5.81e-07 1.91e-07 6.19e-07 erg/cm2
Peak flux PL 1.90e-01 1.39e-01 6.72e-02 4.86e-02 4.19e-01 4.46e-01 ph/cm2/s
90%_error_low -1.90e-01 -1.39e-01 -6.72e-02 -4.86e-02 -3.52e-01 -3.75e-01 ph/cm2/s
90%_error_hi 2.16e-01 1.17e-01 9.02e-02 1.87e-01 3.52e-01 3.77e-01 ph/cm2/s
Fluence CPL 2.59e-07 5.21e-07 7.75e-07 1.95e-06 2.14e-06 3.50e-06 erg/cm2
90%_error_low -4.90e-08 -5.39e-08 -8.49e-08 -1.01e-06 -2.03e-07 -1.02e-06 erg/cm2
90%_error_hi 3.96e-08 5.64e-08 8.76e-08 6.34e-07 2.00e-07 1.04e-06 erg/cm2
Peak flux CPL N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_low -1.90e-01 -1.39e-01 -6.72e-02 -4.86e-02 -3.52e-01 -3.75e-01 ph/cm2/s
90%_error_hi 2.16e-01 1.17e-01 9.02e-02 1.87e-01 3.52e-01 3.77e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 285.8869 40.8865 0.0078 46.3810 -153.6598 2.2681347 24.677 TRIG_01186032 Foreground time interval of the image: 0.792 10.093 (delta_t = 9.301 [sec]) Background time interval of the image: -166.907 0.792 (delta_t = 167.699 [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 0.792 sec. to 80.792 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42763 ( -0.144572 0.145604 ) Norm@50keV : 2.80069E-03 ( -0.000233281 0.000233244 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 55.17 using 59 bins. Reduced chi-squared = 0.967895 # Null hypothesis probability of 5.44e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 80 sec: 0.343280 ( -0.030555 0.030661 ) ph/cm2/s Energy fluence (15-150 keV) : 2.15338e-06 ( -1.90242e-07 1.91122e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.792 sec. to 80.792 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26956 ( -0.287454 0.594077 ) Epeak [keV] : 246.426 ( -246.447 -246.447 ) Norm@50keV : 3.33819E-03 ( -0.000987823 0.003 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.92 using 59 bins. Reduced chi-squared = 0.980714 # Null hypothesis probability of 5.16e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 80 sec: 0.340937 ( -0.031552 0.031628 ) ph/cm2/s Energy fluence (15-150 keV) : 2.13521e-06 ( -2.02617e-07 1.99647e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 8.292 sec. to 9.292 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.97722 ( -2.92376 1.44531 ) Norm@50keV : 2.82457E-03 ( -0.0027931 0.00270572 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 79.65 using 59 bins. Reduced chi-squared = 1.39737 # Null hypothesis probability of 2.54e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.419287 ( -0.351612 0.35201 ) ph/cm2/s Energy fluence (15-150 keV) : 2.54877e-08 ( -2.21015e-08 2.57147e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.292 sec. to 9.292 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 9.98041 ( -9.0155 -9.99145 ) Epeak [keV] : 46.8002 ( -9.42537 10.7615 ) Norm@50keV : 3341.90 ( -3332.21 36537.6 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 75.00 using 59 bins. Reduced chi-squared = 1.33929 # Null hypothesis probability of 4.59e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s Energy fluence (15-150 keV) : 2.46093e-08 ( -1.31331e-08 1.8481e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 64.0 sec. Hardness ratio (energy fluence ratio) = 1.48699676487
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.808252e-07 S(50-150 keV) = 1.3725582e-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 = -9.404514481017708E-01, IMY = 4.656208230364318E-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: -166.907400 0.792000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.6711 11.0848 137.6 36.9 162.8 -0.0325 -0.1 11.2 GRS 1915+105 299.5883 35.1961 0.7 34.3 -151.8 5.8766 16.3 0.3 Cyg X-1 308.0720 40.9605 3.5 34.0 -136.1 1.1729 3.3 1.8 Cyg X-3 326.1230 38.4009 3.6 27.4 -111.4 1.0337 3.2 5.3 Cyg X-2 344.6885 -13.6238 2.4 30.6 32.1 1.8093 4.9 ------ UNKNOWN 350.1011 38.1510 2.7 34.5 -76.9 2.0888 4.3 ------ UNKNOWN 17.3237 24.0253 3.0 50.0 -43.2 4.5569 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.792000 10.092590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.7362 10.9321 9.7 36.9 162.6 0.0726 1.2 3.7 GRS 1915+105 299.5267 35.3358 404.1 34.4 -151.7 -0.0015 -0.0 8.6 Cyg X-1 308.0560 41.0073 7.8 34.0 -136.0 0.0932 1.5 4.1 Cyg X-3 326.0552 38.4525 9.2 27.4 -111.5 0.0703 1.3 9.6 Cyg X-2 278.5040 0.1095 2.0 48.8 149.3 0.8451 5.7 ------ UNKNOWN 272.5755 4.4987 2.8 53.6 156.4 0.9174 4.1 ------ UNKNOWN 306.4722 12.9716 2.8 19.5 166.7 0.1760 4.2 ------ UNKNOWN 285.8869 40.8865 0.5 46.4 -153.7 2.2683 24.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 123.492600 1040.923400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5583 35.2675 6.6 25.2 -137.0 2.4264 1.8 6.7 Her X-1 268.3180 -1.3451 6.7 45.2 160.9 -6.2211 -1.7 7.1 SW J1753.5-0127 289.0163 10.9408 0.0 30.1 129.6 3.7929 2.0 12.8 GRS 1915+105 299.5956 35.1990 0.4 12.2 69.1 33.4006 25.9 0.3 Cyg X-1 307.9533 40.8628 4.9 16.6 38.5 2.8512 2.4 8.9 Cyg X-3 326.2663 38.2785 5.5 30.9 37.1 4.0111 2.1 5.2 Cyg X-2 274.2374 -4.5876 2.3 46.7 151.8 20.4269 5.0 ------ UNKNOWN 345.0792 52.2415 2.6 41.0 8.9 9.0831 4.4 ------ UNKNOWN 11.6025 55.9259 3.3 55.0 -1.3 11.8192 3.5 ------ UNKNOWN 346.8153 64.7587 2.6 41.5 -10.1 8.3282 4.4 ------ UNKNOWN 246.0969 3.1734 3.9 52.0 -170.1 10.1636 2.9 ------ UNKNOWN 274.7573 85.8093 3.1 45.0 -45.5 13.1583 3.7 ------ UNKNOWN