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 15:04:57 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1163119
======================================================================
Trigger: 01163119 Segment: 000
BAT Trigger Time: 702417514.56 [s; MET]
Trigger Stop: 702417515.072 [s; MET]
UTC: 2023-04-05T19:58:03.507020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.467274097228 Dec: -47.0704638653042 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.59
Image Trigger?: NO
Rate S/N Ratio: 22.9128784747792 [ if not an image trigger ]
Image S/N Ratio: 9.59
Analysis Position: [ source = BAT ]
RA: 271.467274097228 Dec: -47.0704638653042 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 271.434620779064 Dec: -47.0718132093437 [deg; J2000]
{ 18h 05m 44.3s , -47d 04' 18.5" }
+/- 0.781687074602248 [arcmin] (estimated 90% radius based on SNR)
+/- 0.242189896917617 [arcmin] (formal 1-sigma fit error)
SNR: 43.2442608923388
Angular difference between the analysis and refined position is 1.336844 arcmin
Partial Coding Fraction: 0.9453125 [ including projection effects ]
Duration
T90: 14.135999917984 +/- 5.59268845486081
Measured from: -7.01199996471405
to: 7.12399995326996 [s; relative to TRIGTIME]
T50: 1.85199999809265 +/- 0.167475413189009
Measured from: 1.51600003242493
to: 3.36800003051758 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.91600000858307
to: 2.91600000858307 [s; relative to TRIGTIME]
Total Fluence
Measured from: -19.0319999456406
to: 12.6560000181198 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.231788 2.137333 1.880233 0.565073
0.059900 0.057825 0.051022 0.039610 [error]
Peak 0.312432 0.640036 0.740229 0.234742
0.015857 0.019938 0.021457 0.014713 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 31.688 -19.032 12.656
T90 14.136 -7.012 7.124
T50 1.852 1.516 3.368
Peak 1.000 1.916 2.916
====== 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 -1.207 -0.057 0.058 - - - 1.20e-02 -3.74e-04 3.73e-04 60.760 57
CPL -0.955 -0.224 0.237 236.028 -86.593 1336.062 1.55e-02 -3.05e-03 4.11e-03 57.060 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -0.883 -0.058 0.058 - - - 1.26e-01 -4.27e-03 4.27e-03 44.500 57
CPL -0.426 -0.239 0.253 205.690 -52.254 152.253 1.98e-01 -4.07e-02 5.42e-02 33.390 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 3.69e-07 8.12e-07 1.41e-06 5.66e-06 3.85e-06 8.25e-06 erg/cm2
90%_error_low -2.39e-08 -3.10e-08 -4.98e-08 -4.56e-07 -1.27e-07 -4.80e-07 erg/cm2
90%_error_hi 2.45e-08 3.09e-08 4.97e-08 4.84e-07 1.27e-07 5.04e-07 erg/cm2
Peak flux PL 2.89e+00 4.20e+00 4.56e+00 9.24e+00 1.45e+01 2.09e+01 ph/cm2/s
90%_error_low -1.99e-01 -1.79e-01 -1.64e-01 -7.05e-01 -4.90e-01 -8.09e-01 ph/cm2/s
90%_error_hi 2.05e-01 1.78e-01 1.64e-01 7.43e-01 4.90e-01 8.22e-01 ph/cm2/s
Fluence CPL 3.46e-07 8.23e-07 1.44e-06 4.07e-06 3.79e-06 6.68e-06 erg/cm2
90%_error_low -3.08e-08 -3.31e-08 -5.82e-08 -9.92e-07 -1.37e-07 -9.89e-07 erg/cm2
90%_error_hi 3.14e-08 3.32e-08 5.87e-08 1.36e-06 1.37e-07 1.37e-06 erg/cm2
Peak flux CPL 2.54e+00 4.28e+00 4.83e+00 6.07e+00 1.43e+01 1.77e+01 ph/cm2/s
90%_error_low -2.57e-01 -1.91e-01 -2.13e-01 -1.13e+00 -5.04e-01 -1.24e+00 ph/cm2/s
90%_error_hi 2.64e-01 1.91e-01 2.15e-01 1.46e+00 5.04e-01 1.52e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 271.4346 -47.0718 0.0045 11.1236 -102.8872 5.8564733 43.244 TRIG_01163119 Foreground time interval of the image: -19.032 10.141 (delta_t = 29.173 [sec]) Background time interval of the image: -239.560 -19.032 (delta_t = 220.528 [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 -19.032 sec. to 12.656 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20721 ( -0.057178 0.0575156 ) Norm@50keV : 1.19991E-02 ( -0.000373597 0.000373361 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 60.76 using 59 bins. Reduced chi-squared = 1.06596 # Null hypothesis probability of 3.42e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 31.69 sec: 1.40991 ( -0.04689 0.04699 ) ph/cm2/s Energy fluence (15-150 keV) : 3.85046e-06 ( -1.26783e-07 1.26965e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -19.032 sec. to 12.656 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.954546 ( -0.224134 0.237449 ) Epeak [keV] : 236.028 ( -86.593 1336.06 ) Norm@50keV : 1.55316E-02 ( -0.00305268 0.00411167 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 57.06 using 59 bins. Reduced chi-squared = 1.01893 # Null hypothesis probability of 4.35e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 31.69 sec: 1.38822 ( -0.05042 0.05053 ) ph/cm2/s Energy fluence (15-150 keV) : 3.79386e-06 ( -1.37476e-07 1.36858e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.916 sec. to 2.916 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.882604 ( -0.0579588 0.0583161 ) Norm@50keV : 0.126293 ( -0.00427424 0.00426891 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 44.50 using 59 bins. Reduced chi-squared = 0.780702 # Null hypothesis probability of 8.86e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 14.4943 ( -0.4903 0.4905 ) ph/cm2/s Energy fluence (15-150 keV) : 1.42718e-06 ( -5.2695e-08 5.27801e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.916 sec. to 2.916 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.426399 ( -0.239198 0.253046 ) Epeak [keV] : 205.690 ( -52.2545 152.253 ) Norm@50keV : 0.198264 ( -0.0407385 0.054197 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 33.39 using 59 bins. Reduced chi-squared = 0.59625 # Null hypothesis probability of 9.93e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 14.2625 ( -0.504 0.5041 ) ph/cm2/s Energy fluence (15-150 keV) : 1.40365e-06 ( -5.53392e-08 5.51643e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 14.136 sec. Hardness ratio (energy fluence ratio) = 1.73244669037
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.1815283e-06 S(50-150 keV) = 2.668928e-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 = -4.385245319988727E-02, IMY = 1.916666906535452E-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: -239.560000 -19.032000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3117 -60.7271 7.2 48.8 16.9 1.3095 1.6 6.3 Cen X-3 186.6402 -62.7784 0.8 40.8 17.2 9.9118 14.9 0.7 GX 301-2 245.0115 -15.6296 0.8 31.7 137.5 11.1722 15.3 2.0 Sco X-1 255.9170 -37.8298 1.5 8.3 160.0 3.6203 7.9 3.4 4U 1700-377 256.3920 -36.3641 2.9 9.8 161.8 1.8304 4.0 4.1 GX 349+2 262.9524 -24.7249 14.2 22.3 175.2 0.3986 0.8 3.3 GX 1+4 264.5442 -44.5627 4.0 6.7 -123.9 1.4614 2.9 10.9 4U 1735-44 268.4548 -1.5198 4.9 46.1 175.0 2.7326 2.3 6.6 SW J1753.5-0127 270.1672 -24.9333 4.7 24.3 -169.0 1.1981 2.4 10.8 GX 5-1 270.1484 -25.7303 3.8 23.6 -168.2 1.4296 3.0 8.4 GRS 1758-258 274.1334 -14.0409 4.8 35.8 -171.1 1.4803 2.4 7.4 GX 17+2 275.7889 -30.3441 4.3 22.4 -151.1 1.3390 2.7 7.2 H1820-303 285.1819 -25.0885 0.0 31.8 -144.6 -0.3087 -0.4 12.8 HT1900.1-2455 263.0007 -33.7615 4.4 13.7 -175.3 1.1813 2.6 4.4 GX 354-0 92.7091 -79.0449 3.0 54.4 -19.5 6.0093 3.8 ------ UNKNOWN 300.6393 -9.5522 2.5 53.2 -142.2 11.0427 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -19.032000 10.140600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3343 -60.5235 10.2 48.9 17.1 0.3352 1.1 6.0 Cen X-3 186.6159 -62.6726 7.3 40.8 17.3 0.3292 1.6 6.0 GX 301-2 244.9863 -15.6109 64.7 31.7 137.4 0.0312 0.2 1.8 Sco X-1 255.9801 -37.7941 5.4 8.4 160.4 -0.2571 -2.1 3.0 4U 1700-377 256.6777 -36.3415 0.0 9.9 163.1 0.1073 0.9 12.7 GX 349+2 263.0118 -24.7530 23.4 22.3 175.3 0.0650 0.5 0.5 GX 1+4 265.0026 -44.3503 0.0 7.1 -124.7 0.2001 1.6 12.6 4U 1735-44 268.4341 -1.5770 4.5 46.0 174.9 0.6766 2.5 8.5 SW J1753.5-0127 270.1770 -24.8968 0.0 24.4 -169.1 -0.3040 -2.4 12.4 GX 5-1 270.2956 -25.6254 4.5 23.8 -168.0 -0.3232 -2.5 7.1 GRS 1758-258 274.1304 -14.0567 3.7 35.8 -171.1 0.4875 3.1 7.4 GX 17+2 276.0655 -30.5142 5.3 22.5 -150.3 -0.2852 -2.2 11.4 H1820-303 285.1819 -25.0885 0.0 31.8 -144.6 0.1448 0.9 12.8 HT1900.1-2455 262.8586 -33.8502 12.3 13.6 -175.7 -0.1127 -0.9 6.6 GX 354-0 271.4346 -47.0718 0.3 11.1 -102.9 5.8565 43.2 ------ UNKNOWN 319.8662 -60.1545 2.4 39.3 -68.7 1.6667 4.7 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 53.740590 962.670000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.7151 -62.7739 1.1 47.2 33.2 28.3773 10.4 1.6 GX 301-2 244.9792 -15.6386 1.1 38.3 131.0 51.3601 10.2 0.1 Sco X-1 255.9387 -37.8727 4.8 14.7 118.1 5.0661 2.4 2.8 4U 1700-377 256.3643 -36.3823 4.5 15.5 123.1 5.2775 2.6 4.2 GX 349+2 262.9831 -24.7835 3.0 23.3 155.0 6.9211 3.9 2.7 GX 1+4 264.6776 -44.3825 7.8 5.5 112.0 2.5416 1.5 4.9 4U 1735-44 268.4694 -1.4888 5.4 45.7 170.6 10.8005 2.1 6.5 SW J1753.5-0127 270.2979 -25.1329 4.6 22.0 172.0 4.7554 2.5 3.3 GX 5-1 270.4499 -25.8149 6.0 21.3 172.3 3.6237 1.9 9.1 GRS 1758-258 274.0179 -13.8939 20.3 33.3 179.3 1.2494 0.6 8.6 GX 17+2 275.7653 -30.2103 0.0 17.2 -172.5 0.8392 0.5 12.5 H1820-303 284.8793 -24.8915 9.4 24.6 -154.8 -2.1586 -1.2 8.7 HT1900.1-2455 262.9889 -33.8359 535.8 14.7 146.0 -0.0400 -0.0 0.1 GX 354-0 159.0850 -75.7566 4.6 49.8 12.2 5.9140 2.5 ------ UNKNOWN 303.6772 -87.9541 2.4 41.2 -6.8 11.4011 4.8 ------ UNKNOWN 304.5169 -2.3033 2.7 53.1 -142.3 34.5433 4.2 ------ UNKNOWN