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: Mon Nov 14 22:10:48 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger717500
======================================================================
Trigger: 00717500 Segment: 000
BAT Trigger Time: 498141099.712 [s; MET]
Trigger Stop: 498141101.12 [s; MET]
UTC: 2016-10-14T12:31:22.705760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 332.628404737304 Dec: 7.48598860616531 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.79
Image Trigger?: NO
Rate S/N Ratio: 26.3818119165458 [ if not an image trigger ]
Image S/N Ratio: 6.79
Analysis Position: [ source = BAT ]
RA: 332.628404737304 Dec: 7.48598860616531 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 332.628490794962 Dec: 7.46876764760558 [deg; J2000]
{ 22h 10m 30.8s , +07d 28' 07.6" }
+/- 1.62273540755597 [arcmin] (estimated 90% radius based on SNR)
+/- 0.582353443476894 [arcmin] (formal 1-sigma fit error)
SNR: 15.2322656467254
Angular difference between the analysis and refined position is 1.033270 arcmin
Partial Coding Fraction: 0.1347656 [ including projection effects ]
Duration
T90: 23.00 +/- 4.47213595499958
Measured from: -11.712
to: 11.288 [s; relative to TRIGTIME]
T50: 9.00 +/- 2.23606797749979
Measured from: -5.712
to: 3.288 [s; relative to TRIGTIME]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 27.000 -14.712 12.288
T90 23.000 -11.712 11.288
T50 9.000 -5.712 3.288
Peak 1.000 0.288 1.288
====== 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 -1.443 -0.151 0.151 - - - 8.53e-03 -7.37e-04 7.37e-04 59.120 57
CPL -1.182 -0.338 0.657 175.218 -175.218 -175.218 1.13e-02 -3.34e-03 1.08e-02 58.550 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 -1.793 -0.287 0.265 - - - 1.95e-02 -4.07e-03 4.03e-03 74.300 57
CPL 1.532 -1.813 3.185 61.873 -8.551 9.476 6.06e-01 -6.06e-01 8.17e+00 62.380 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 2.79e-07 5.31e-07 7.81e-07 2.46e-06 2.21e-06 4.05e-06 erg/cm2
90%_error_low -4.44e-08 -5.25e-08 -8.13e-08 -5.20e-07 -2.01e-07 -5.79e-07 erg/cm2
90%_error_hi 4.67e-08 5.19e-08 8.04e-08 6.05e-07 2.02e-07 6.44e-07 erg/cm2
Peak flux PL 1.06e+00 9.00e-01 5.20e-01 4.47e-01 2.68e+00 2.93e+00 ph/cm2/s
90%_error_low -2.94e-01 -1.85e-01 -1.28e-01 -1.75e-01 -5.51e-01 -5.86e-01 ph/cm2/s
90%_error_hi 3.14e-01 1.85e-01 1.26e-01 2.11e-01 5.52e-01 5.86e-01 ph/cm2/s
Fluence CPL 2.15e-07 2.97e-07 3.17e-07 7.71e-07 1.04e-06 1.60e-06 erg/cm2
90%_error_low -3.87e-08 -1.42e-07 -9.73e-08 -1.46e-07 -3.23e-07 -4.28e-07 erg/cm2
90%_error_hi 3.77e-08 3.52e-08 8.05e-08 1.15e-07 2.76e-07 3.22e-07 erg/cm2
Peak flux CPL 4.65e-01 1.12e+00 8.65e-01 1.31e-01 2.57e+00 2.58e+00 ph/cm2/s
90%_error_low -4.65e-01 -2.98e-01 -2.37e-01 -7.47e-02 -5.82e-01 -5.91e-01 ph/cm2/s
90%_error_hi 4.22e-01 2.56e-01 2.72e-01 1.15e-01 5.75e-01 5.85e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 332.6285 7.4688 0.0126 48.4925 156.9817 3.1135614 15.232 TRIG_00717500 Foreground time interval of the image: -6.532 23.189 (delta_t = 29.721 [sec]) Background time interval of the image: -768.111 -750.032 (delta_t = 18.079 [sec]) -239.712 -6.532 (delta_t = 233.180 [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 -14.712 sec. to 12.288 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.44255 ( -0.150702 0.150998 ) Norm@50keV : 8.53269E-03 ( -0.000736701 0.000736651 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.12 using 59 PHA bins. # Reduced chi-squared = 1.037 for 57 degrees of freedom # Null hypothesis probability = 3.981323e-01 Photon flux (15-150 keV) in 27 sec: 1.04963 ( -0.097561 0.09797 ) ph/cm2/s Energy fluence (15-150 keV) : 2.20792e-06 ( -2.01078e-07 2.01893e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -14.712 sec. to 12.288 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.18223 ( -0.337651 0.656813 ) Epeak [keV] : 175.218 ( -175.215 -175.215 ) Norm@50keV : 1.12501E-02 ( -0.00333548 0.0107644 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.55 using 59 PHA bins. # Reduced chi-squared = 1.046 for 56 degrees of freedom # Null hypothesis probability = 3.819440e-01 Photon flux (15-150 keV) in 27 sec: 1.03595 ( -0.102271 0.10251 ) ph/cm2/s Energy fluence (15-150 keV) : 1.0367e-06 ( -3.23104e-07 2.76386e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.100 sec. to 1.100 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.79265 ( -0.286538 0.264904 ) Norm@50keV : 1.94843E-02 ( -0.00406971 0.00402973 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 74.30 using 59 PHA bins. # Reduced chi-squared = 1.304 for 57 degrees of freedom # Null hypothesis probability = 6.157380e-02 Photon flux (15-150 keV) in 1 sec: 2.67750 ( -0.55071 0.55203 ) ph/cm2/s Energy fluence (15-150 keV) : 1.79444e-07 ( -3.77146e-08 3.77761e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.100 sec. to 1.100 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.53209 ( -1.82652 3.17133 ) Epeak [keV] : 61.8734 ( -8.56466 9.46259 ) Norm@50keV : 0.606419 ( -0.617995 8.15637 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.38 using 59 PHA bins. # Reduced chi-squared = 1.114 for 56 degrees of freedom # Null hypothesis probability = 2.598710e-01 Photon flux (15-150 keV) in 1 sec: 2.56754 ( -0.58156 0.57518 ) ph/cm2/s Energy fluence (15-150 keV) : 1.97224e-07 ( -3.85302e-08 3.87314e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 23.0 sec. Hardness ratio (energy fluence ratio) = 1.47170259061
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 8.093026e-07 S(50-150 keV) = 1.3986438e-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 = -1.040027215880981E+00, IMY = -4.418580807368009E-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: -768.111420 -750.032000 -239.712000 -6.532000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.5964 35.2232 1.1 48.1 -147.0 6.0271 10.6 1.3 Cyg X-1 308.1133 40.9517 2.0 39.3 -145.4 1.8644 5.9 0.1 Cyg X-3 326.2312 38.2794 7.2 28.7 -162.4 0.3556 1.6 3.8 Cyg X-2 13.3766 10.3738 2.9 38.8 98.6 2.7892 3.9 ------ UNKNOWN 59.3797 40.1376 3.4 39.9 14.3 1.0054 3.4 ------ UNKNOWN 317.4091 7.8397 3.2 56.1 173.5 4.0090 3.6 ------ UNKNOWN 97.6990 57.2331 2.9 53.0 -23.5 2.3882 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -6.532000 23.188600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.4677 35.3168 3.8 48.1 -146.8 0.5049 3.1 9.2 Cyg X-1 308.1990 40.7483 9.9 39.4 -145.7 -0.1083 -1.2 12.9 Cyg X-3 326.3387 38.2732 8.4 28.6 -162.5 -0.0790 -1.4 8.4 Cyg X-2 25.5968 17.8206 2.9 35.3 75.9 0.5086 3.9 ------ UNKNOWN 5.5894 14.5066 2.3 33.8 110.6 0.5740 5.0 ------ UNKNOWN 332.6285 7.4688 0.8 48.5 157.0 3.1132 15.3 ------ UNKNOWN 93.3028 45.2555 2.2 57.8 -9.7 1.4999 5.3 ------ UNKNOWN 305.8413 22.6002 2.0 52.1 -164.1 0.9503 5.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 106.788600 902.588600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.6024 35.2197 0.5 40.9 -37.9 19.6848 25.3 1.2 Cyg X-1 308.0992 40.9932 1.7 39.9 -24.4 4.4138 6.6 2.5 Cyg X-3 326.0227 38.2538 4.3 31.2 -5.2 1.3534 2.7 8.1 Cyg X-2 346.3075 -46.9463 4.1 55.9 173.6 8.5606 2.8 ------ UNKNOWN