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 23:21:16 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1191188
======================================================================
Trigger: 01191188 Segment: 000
BAT Trigger Time: 716114877.504 [s; MET]
Trigger Stop: 716114883.008 [s; MET]
UTC: 2023-09-11T08:47:25.515160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 226.782406715387 Dec: -41.333950377554 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.76
Image Trigger?: NO
Rate S/N Ratio: 12.0830459735946 [ if not an image trigger ]
Image S/N Ratio: 6.76
Analysis Position: [ source = BAT ]
RA: 226.782406715387 Dec: -41.333950377554 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 226.801297792971 Dec: -41.3525978390595 [deg; J2000]
{ 15h 07m 12.3s , -41d 21' 09.4" }
+/- 1.86995487563614 [arcmin] (estimated 90% radius based on SNR)
+/- 0.812551483805578 [arcmin] (formal 1-sigma fit error)
SNR: 12.4390782304136
Angular difference between the analysis and refined position is 1.405690 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 14.4879999160767 +/- 2.858812227342
Measured from: -7.37599992752075
to: 7.11199998855591 [s; relative to TRIGTIME]
T50: 6.35599994659424 +/- 3.06790418265246
Measured from: -2.65599989891052
to: 3.70000004768372 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.07200002670288
to: 3.07200002670288 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.63199996948242
to: 9.58400011062622 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.175461 0.191859 0.195676 0.059233
0.032745 0.031112 0.025829 0.022245 [error]
Peak 0.034609 0.026979 0.020566 0.010136
0.008076 0.007566 0.006299 0.005322 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 18.216 -8.632 9.584
T90 14.488 -7.376 7.112
T50 6.356 -2.656 3.700
Peak 1.000 2.072 3.072
====== 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 -1.260 -0.273 0.282 - - - 2.09e-03 -3.09e-04 3.09e-04 56.280 57
CPL -1.221 -1.937 0.843 958.582 -958.582 -958.582 2.20e-03 -4.04e-04 -2.20e-03 56.340 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 -1.906 -0.600 0.513 - - - 4.53e-03 -1.61e-03 1.47e-03 57.570 57
CPL -1.917 -1.005 0.528 9999.320 -9999.310 -9999.320 4.50e-03 -4.50e-03 2.04e-02 57.570 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 3.89e-08 8.28e-08 1.38e-07 5.26e-07 3.81e-07 7.86e-07 erg/cm2
90%_error_low -1.10e-08 -1.44e-08 -2.51e-08 -1.88e-07 -6.20e-08 -2.07e-07 erg/cm2
90%_error_hi 1.19e-08 1.40e-08 2.47e-08 2.56e-07 6.27e-08 2.64e-07 erg/cm2
Peak flux PL 2.76e-01 2.18e-01 1.17e-01 9.05e-02 6.52e-01 7.01e-01 ph/cm2/s
90%_error_low -1.06e-01 -5.79e-02 -5.24e-02 -6.02e-02 -1.73e-01 -1.88e-01 ph/cm2/s
90%_error_hi 1.15e-01 5.79e-02 5.29e-02 1.05e-01 1.73e-01 1.90e-01 ph/cm2/s
Fluence CPL 3.96e-08 8.24e-08 1.38e-07 5.53e-07 3.82e-07 7.49e-07 erg/cm2
90%_error_low -1.18e-08 -1.47e-08 -2.54e-08 -3.89e-07 -6.79e-08 -3.28e-07 erg/cm2
90%_error_hi 1.13e-08 1.60e-08 2.82e-08 8.38e-09 6.41e-08 2.88e-07 erg/cm2
Peak flux CPL 2.80e-01 2.18e-01 1.15e-01 9.93e-02 6.53e-01 7.03e-01 ph/cm2/s
90%_error_low -1.24e-01 -5.71e-02 -7.41e-02 -6.31e-02 -1.75e-01 -1.89e-01 ph/cm2/s
90%_error_hi 1.15e-01 3.75e-02 5.44e-02 2.63e-02 1.72e-01 1.85e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 226.8013 -41.3526 0.0154 12.8433 -53.3051 0.6973701 12.439 TRIG_01191188 Foreground time interval of the image: -8.632 9.584 (delta_t = 18.216 [sec]) Background time interval of the image: -239.504 -8.632 (delta_t = 230.872 [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 -8.632 sec. to 9.584 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26018 ( -0.273434 0.281538 ) Norm@50keV : 2.09318E-03 ( -0.000309166 0.000309166 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 56.28 using 59 bins. Reduced chi-squared = 0.987368 # Null hypothesis probability of 5.02e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 18.22 sec: 0.247984 ( -0.038259 0.038472 ) ph/cm2/s Energy fluence (15-150 keV) : 3.80714e-07 ( -6.20316e-08 6.26988e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.632 sec. to 9.584 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25627 ( -1.93747 0.8424 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 2.10237E-03 ( -0.000310556 -0.00210243 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 56.28 using 59 bins. Reduced chi-squared = 1.005 # Null hypothesis probability of 4.64e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 18.22 sec: 0.248967 ( -0.041502 0.039324 ) ph/cm2/s Energy fluence (15-150 keV) : 3.82181e-07 ( -6.7907e-08 6.40692e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.072 sec. to 3.072 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.90608 ( -0.600111 0.512923 ) Norm@50keV : 4.52860E-03 ( -0.00160889 0.00147091 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 57.57 using 59 bins. Reduced chi-squared = 1.01 # Null hypothesis probability of 4.54e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.651628 ( -0.173023 0.173132 ) ph/cm2/s Energy fluence (15-150 keV) : 4.16438e-08 ( -1.3471e-08 1.41248e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.072 sec. to 3.072 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.91705 ( -1.00776 0.524487 ) Epeak [keV] : 9999.32 ( -9999.35 -9999.36 ) Norm@50keV : 4.49569E-03 ( -0.00452011 0.0204081 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 57.57 using 59 bins. Reduced chi-squared = 1.02804 # Null hypothesis probability of 4.17e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.652626 ( -0.174534 0.172458 ) ph/cm2/s Energy fluence (15-150 keV) : 3.92022e-08 ( -3.6428e-08 1.30615e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 14.488 sec. Hardness ratio (energy fluence ratio) = 1.67001344587
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.2175008e-07 S(50-150 keV) = 2.589623e-07
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 = 1.362359546233123E-01, IMY = 1.828085824036829E-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: -239.504000 -8.632000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.4882 -60.4536 36.0 36.3 -145.6 0.2396 0.3 11.4 Cen X-3 186.3299 -62.7974 4.4 28.5 -147.5 1.6806 2.6 9.1 GX 301-2 244.9732 -15.6567 1.4 36.9 -3.1 6.4317 8.3 1.1 Sco X-1 256.0084 -37.8378 1.2 19.3 34.6 5.7120 9.4 1.1 4U 1700-377 256.2991 -36.2684 22.5 20.7 32.5 0.3177 0.5 11.4 GX 349+2 262.8480 -24.6061 30.4 33.6 29.7 -0.3505 -0.4 12.1 GX 1+4 264.7539 -44.5217 7.3 19.6 62.9 0.9577 1.6 4.3 4U 1735-44 270.2891 -25.1713 9.5 36.7 40.2 1.5697 1.2 5.5 GX 5-1 270.1729 -25.8380 23.2 36.1 40.7 0.6176 0.5 9.0 GRS 1758-258 273.9527 -14.0418 15.8 47.9 35.8 -1.4986 -0.7 3.1 GX 17+2 275.8630 -30.2961 15.4 35.6 52.1 -0.9829 -0.8 5.3 H1820-303 263.1456 -33.9746 8.6 25.9 40.5 0.9666 1.4 11.5 GX 354-0 261.9332 -16.2014 0.4 40.8 22.3 29.7829 27.1 ------ UNKNOWN 257.8550 -13.7045 3.0 41.7 15.4 4.0833 3.8 ------ UNKNOWN 255.2926 -34.7216 2.5 21.6 28.2 2.7771 4.7 ------ UNKNOWN 139.8464 -50.8197 2.5 55.9 -146.3 16.2632 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -8.632000 9.584000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.0206 -60.6201 11.4 36.5 -146.0 -0.0803 -1.0 8.7 Cen X-3 186.5322 -62.9750 0.0 28.4 -147.9 0.1001 1.5 12.7 GX 301-2 245.0907 -15.7150 6.3 36.9 -2.9 -0.1583 -1.8 7.8 Sco X-1 256.0474 -37.8252 2.7 19.4 34.6 -0.2706 -4.2 3.1 4U 1700-377 256.3744 -36.2724 57.6 20.8 32.6 0.0130 0.2 9.5 GX 349+2 262.9575 -24.5985 4.7 33.7 29.8 0.2309 2.4 9.3 GX 1+4 264.7779 -44.4080 5.7 19.7 62.7 -0.1451 -2.0 2.9 4U 1735-44 270.2980 -25.2176 3.8 36.6 40.2 0.3506 3.1 8.3 GX 5-1 270.1937 -25.6762 7.0 36.2 40.6 -0.1884 -1.7 7.1 GRS 1758-258 273.9905 -13.9421 7.4 48.1 35.8 -0.4276 -1.6 5.7 GX 17+2 275.9786 -30.4964 5.2 35.5 52.5 -0.2632 -2.2 8.2 H1820-303 263.1469 -33.7229 5.2 26.1 40.1 -0.1695 -2.2 10.3 GX 354-0 90.4482 -79.5250 2.6 47.0 172.3 0.5273 4.5 ------ UNKNOWN 238.7915 -70.5856 2.7 18.6 162.9 0.2393 4.2 ------ UNKNOWN 226.8013 -41.3526 0.9 12.8 -53.3 0.6971 12.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 101.796590 815.996600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3190 -60.6206 17.9 38.8 -165.3 1.3363 0.6 0.2 Cen X-3 186.4192 -62.8818 4.4 31.9 -172.1 4.2079 2.6 9.3 GX 301-2 244.9777 -15.6115 1.1 30.1 10.7 20.3660 10.1 1.7 Sco X-1 255.9512 -37.7196 2.9 22.7 64.4 7.7253 4.0 7.7 4U 1700-377 256.4766 -36.5507 4.6 23.4 62.0 5.1388 2.5 7.9 GX 349+2 263.0077 -24.7450 101.4 34.2 46.4 -0.3997 -0.1 0.1 GX 1+4 264.8279 -44.4361 11.4 27.8 83.3 2.8340 1.0 3.7 4U 1735-44 270.4456 -25.1449 20.2 39.4 53.7 2.7742 0.6 9.6 GX 5-1 270.4051 -25.6573 6.8 39.1 54.3 8.1436 1.7 7.6 GRS 1758-258 275.9467 -30.2466 9.6 40.8 64.4 -9.9701 -1.2 7.3 H1820-303 262.9457 -33.8621 117.0 29.4 61.1 -0.2933 -0.1 2.7 GX 354-0 261.9352 -16.1964 0.5 39.3 34.7 94.0973 22.4 ------ UNKNOWN 256.3492 -1.0458 2.8 48.3 15.3 18.9900 4.1 ------ UNKNOWN 220.2355 -39.7594 2.8 5.2 -100.6 5.8429 4.1 ------ UNKNOWN 179.9244 -45.0765 2.9 33.9 -138.4 8.5975 4.0 ------ UNKNOWN 148.3291 -43.1615 2.9 55.9 -146.3 41.5790 4.1 ------ UNKNOWN 165.0205 -34.6805 3.7 48.1 -129.2 20.1973 3.1 ------ UNKNOWN