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 v2.46
Process Start Time: Sun Nov 20 15:08:57 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger716876
======================================================================
Trigger: 00716876 Segment: 000
BAT Trigger Time: 497858111.104 [s; MET]
Trigger Stop: 497858113.152 [s; MET]
UTC: 2016-10-11T05:54:54.113800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.710556686154 Dec: 8.32611886348883 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.98
Image Trigger?: NO
Rate S/N Ratio: 11 [ if not an image trigger ]
Image S/N Ratio: 6.98
Analysis Position: [ source = BAT ]
RA: 245.710556686154 Dec: 8.32611886348883 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 245.693789924305 Dec: 8.31575136714363 [deg; J2000]
{ 16h 22m 46.5s , +08d 18' 56.7" }
+/- 2.44336594918023 [arcmin] (estimated 90% radius based on SNR)
+/- 1.27739164836744 [arcmin] (formal 1-sigma fit error)
SNR: 8.48885410623575
Angular difference between the analysis and refined position is 1.173796 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 4.27599990367889 +/- 1.26309465755692
Measured from: -0.119999945163727
to: 4.15599995851517 [s; relative to TRIGTIME]
T50: 1.89599990844727 +/- 1.38905434300434
Measured from: 0.79200005531311
to: 2.68799996376038 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.36800003051758
to: 2.36800003051758 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.351999998092651
to: 4.51600003242493 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.040202 0.119915 0.098891 0.028461
0.023297 0.021225 0.018025 0.014845 [error]
Peak 0.023920 0.039916 0.028940 0.002460
0.010607 0.009917 0.008308 0.006569 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 4.868 -0.352 4.516
T90 4.276 -0.120 4.156
T50 1.896 0.792 2.688
Peak 1.000 1.368 2.368
====== 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 -1.116 -0.335 0.364 - - - 4.54e-03 -9.22e-04 9.02e-04 52.530 57
CPL -0.800 -5.531 1.476 222.842 N/A N/A 6.23e-03 N/A N/A 52.340 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 -1.540 -0.447 0.447 - - - 7.04e-03 -1.96e-03 1.96e-03 59.720 57
CPL 1.225 -2.514 5.276 58.201 -13.760 80.260 1.61e-01 -1.61e-01 3.93e+01 56.080 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 1.97e-08 4.59e-08 8.46e-08 3.74e-07 2.30e-07 5.24e-07 erg/cm2
90%_error_low -7.76e-09 -1.19e-08 -1.69e-08 -1.46e-07 -4.41e-08 -1.56e-07 erg/cm2
90%_error_hi 9.12e-09 1.17e-08 1.67e-08 2.09e-07 4.42e-08 2.08e-07 erg/cm2
Peak flux PL 3.01e-01 2.96e-01 2.03e-01 2.20e-01 8.89e-01 1.02e+00 ph/cm2/s
90%_error_low -1.32e-01 -9.17e-02 -6.60e-02 -1.14e-01 -2.59e-01 -2.83e-01 ph/cm2/s
90%_error_hi 1.54e-01 9.04e-02 6.56e-02 1.69e-01 2.63e-01 2.83e-01 ph/cm2/s
Fluence CPL 1.81e-08 4.67e-08 8.76e-08 2.54e-07 2.27e-07 4.06e-07 erg/cm2
90%_error_low -9.26e-09 -1.25e-08 -1.92e-08 -1.90e-07 -4.68e-08 -1.95e-07 erg/cm2
90%_error_hi 1.03e-08 1.28e-08 2.09e-08 1.68e-07 4.57e-08 2.13e-07 erg/cm2
Peak flux CPL 1.70e-01 3.51e-01 2.35e-01 3.25e-02 7.86e-01 7.89e-01 ph/cm2/s
90%_error_low -1.37e-01 -1.19e-01 -8.94e-02 -3.25e-02 -2.67e-01 -2.70e-01 ph/cm2/s
90%_error_hi 1.87e-01 1.22e-01 8.79e-02 1.47e-01 2.78e-01 2.94e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 245.6938 8.3158 0.0228 42.1832 -29.3233 0.3291498 8.489 TRIG_00716876 Foreground time interval of the image: -0.352 4.516 (delta_t = 4.868 [sec]) Background time interval of the image: -647.903 -627.573 (delta_t = 20.330 [sec]) -239.104 -0.352 (delta_t = 238.752 [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 -0.352 sec. to 4.516 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.11647 ( -0.334535 0.364414 ) Norm@50keV : 4.53950E-03 ( -0.000921896 0.000902101 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.53 using 59 PHA bins. # Reduced chi-squared = 0.9215 for 57 degrees of freedom # Null hypothesis probability = 6.433450e-01 Photon flux (15-150 keV) in 4.868 sec: 0.527421 ( -0.112063 0.114508 ) ph/cm2/s Energy fluence (15-150 keV) : 2.29869e-07 ( -4.41353e-08 4.42195e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.352 sec. to 4.516 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.24228 ( -4.08961 2.91825 ) Epeak [keV] : 81.3130 ( ) Norm@50keV : 4.43258E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.11 using 59 PHA bins. # Reduced chi-squared = 0.9305 for 56 degrees of freedom # Null hypothesis probability = 6.229883e-01 Photon flux (15-150 keV) in 4.868 sec: 0.519059 ( -0.115295 0.118528 ) ph/cm2/s Energy fluence (15-150 keV) : 2.26804e-07 ( -4.68048e-08 4.57236e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.368 sec. to 2.368 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.54011 ( -0.44659 0.447634 ) Norm@50keV : 7.03846E-03 ( -0.00196313 0.0019591 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.72 using 59 PHA bins. # Reduced chi-squared = 1.048 for 57 degrees of freedom # Null hypothesis probability = 3.772078e-01 Photon flux (15-150 keV) in 1 sec: 0.888608 ( -0.25866 0.262692 ) ph/cm2/s Energy fluence (15-150 keV) : 6.6359e-08 ( -1.9194e-08 1.94534e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.368 sec. to 2.368 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.22453 ( -2.52642 5.26374 ) Epeak [keV] : 58.2009 ( -13.7119 80.3081 ) Norm@50keV : 0.160884 ( -0.164031 39.3341 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.08 using 59 PHA bins. # Reduced chi-squared = 1.001 for 56 degrees of freedom # Null hypothesis probability = 4.717360e-01 Photon flux (15-150 keV) in 1 sec: 0.785771 ( -0.267077 0.278309 ) ph/cm2/s Energy fluence (15-150 keV) : 5.68526e-08 ( -1.84279e-08 2.10138e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 4.276 sec. Hardness ratio (energy fluence ratio) = 1.84493023333
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.560335e-08 S(50-150 keV) = 1.6426443e-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 = 7.900976664613558E-01, IMY = 4.438040284216307E-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: -647.903410 -627.573100 -239.104000 -0.352000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9896 -15.6346 0.2 25.9 -61.9 15.7731 49.3 0.7 Sco X-1 255.9060 -37.8735 4.9 16.6 -128.3 0.5688 2.3 4.2 4U 1700-377 256.5363 -36.3963 4.2 15.3 -125.2 0.6885 2.7 5.1 GX 349+2 262.9271 -24.7419 4.8 6.9 -68.6 0.5783 2.4 4.5 GX 1+4 264.6377 -44.5069 5.5 18.6 -158.8 0.5309 2.1 5.7 4U 1735-44 268.3727 -1.4220 9.4 25.1 4.0 -0.3263 -1.2 1.9 SW J1753.5-0127 270.2727 -25.0642 2.0 1.4 7.9 1.3163 5.7 1.1 GX 5-1 270.4699 -25.7896 106.1 0.7 22.1 0.0253 0.1 9.5 GRS 1758-258 273.9923 -14.0390 2.9 12.9 24.8 0.9318 3.9 0.8 GX 17+2 275.8944 -30.3320 5.2 6.3 137.9 0.5000 2.2 2.6 H1820-303 285.1386 -24.8907 4.5 13.5 95.1 0.6720 2.6 5.9 HT1900.1-2455 288.6720 10.9688 26.6 41.5 36.4 0.2248 0.4 7.6 GRS 1915+105 263.1843 -33.9714 11.8 9.7 -134.0 0.2389 1.0 12.7 GX 354-0 291.6212 -0.4486 3.8 33.1 50.2 1.1997 3.0 ------ UNKNOWN 309.8263 -48.2332 2.1 37.6 144.5 2.3594 5.4 ------ UNKNOWN 327.2142 -65.0343 3.2 52.4 162.0 4.0539 3.7 ------ UNKNOWN 270.8806 -64.7451 2.4 38.3 -171.9 1.4474 4.7 ------ UNKNOWN 271.7389 -74.3099 2.3 47.9 -172.0 2.5663 5.0 ------ UNKNOWN 230.5493 3.0594 2.7 48.4 -50.1 4.5538 4.3 ------ UNKNOWN 219.5396 -42.6709 2.2 44.1 -116.5 5.3780 5.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.352000 4.516000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9773 -15.6617 406.1 25.9 -61.9 -0.0008 -0.0 1.3 Sco X-1 256.0860 -37.8229 6.5 16.5 -128.5 0.0432 1.8 4.9 4U 1700-377 256.2578 -36.5698 0.0 15.6 -125.2 0.0498 2.1 12.3 GX 349+2 263.0594 -24.5914 17.6 6.8 -67.1 -0.0151 -0.7 9.6 GX 1+4 264.9318 -44.3672 11.7 18.4 -159.3 -0.0227 -1.0 9.5 4U 1735-44 268.2551 -1.6190 0.0 24.9 3.7 -0.0149 -0.6 12.1 SW J1753.5-0127 270.0993 -24.9720 5.0 1.5 1.9 0.0561 2.3 11.9 GX 5-1 270.1938 -25.8574 5.7 0.6 0.4 -0.0495 -2.0 9.0 GRS 1758-258 273.8589 -14.0732 8.4 12.8 24.3 0.0315 1.4 8.8 GX 17+2 276.0016 -30.2012 4.6 6.3 136.5 0.0584 2.5 10.7 H1820-303 284.8856 -24.8060 8.2 13.3 94.5 0.0350 1.4 10.7 HT1900.1-2455 288.7491 11.0590 8.7 41.6 36.4 -0.0670 -1.3 7.4 GRS 1915+105 263.1846 -33.9714 0.0 9.7 -134.0 -0.0020 -0.1 12.7 GX 354-0 245.6938 8.3158 1.4 42.2 -29.3 0.3291 8.5 ------ UNKNOWN 240.8524 -33.3290 2.5 26.3 -103.7 0.1585 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 99.396590 963.038900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9845 -15.6347 0.2 24.0 -161.8 54.0909 70.7 0.4 Sco X-1 254.5142 35.2031 3.7 28.1 31.9 2.4185 3.1 8.8 Her X-1 256.0975 -37.7871 14.1 47.1 -174.7 1.1323 0.8 6.3 4U 1700-377 256.4204 -36.4209 19.1 45.9 -175.5 0.7686 0.6 0.7 GX 349+2 263.1519 -24.8073 4.6 37.2 169.8 2.7370 2.5 8.6 GX 1+4 264.7685 -44.5262 8.7 55.6 -179.9 -4.7586 -1.3 4.7 4U 1735-44 268.3553 -1.3077 7.2 24.5 128.6 -1.2378 -1.6 8.7 SW J1753.5-0127 270.2821 -25.1454 3.6 41.1 161.6 4.8466 3.2 4.0 GX 5-1 270.2668 -25.6465 3.6 41.5 162.1 4.9688 3.2 6.1 GRS 1758-258 273.8814 -14.1011 11.9 35.8 145.0 1.2229 1.0 8.2 GX 17+2 275.9875 -30.1818 4.8 48.3 160.8 5.3044 2.4 11.6 H1820-303 285.1398 -24.8068 3.9 50.7 148.4 -11.0595 -3.0 8.9 HT1900.1-2455 263.1092 -33.7993 8.5 45.2 176.0 1.9499 1.4 6.4 GX 354-0 249.1672 41.8291 2.6 33.6 21.2 3.8968 4.5 ------ UNKNOWN 246.3125 3.1087 2.9 5.3 -170.1 2.8728 4.0 ------ UNKNOWN 206.4000 35.1252 3.4 44.8 -30.8 4.2620 3.3 ------ UNKNOWN