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 Jul 17 15:33:14 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger759159
======================================================================
Trigger: 00759159 Segment: 000
BAT Trigger Time: 520433632.448 [s; MET]
Trigger Stop: 520433633.472 [s; MET]
UTC: 2017-06-29T12:53:33.156640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 130.01568696786 Dec: -46.5868423894367 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.01
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 7.01
Analysis Position: [ source = BAT ]
RA: 130.01568696786 Dec: -46.5868423894367 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 129.96010172077 Dec: -46.58338998287 [deg; J2000]
{ 08h 39m 50.4s , -46d 35' 00.2" }
+/- 1.32242568613424 [arcmin] (estimated 90% radius based on SNR)
+/- 0.489549325654593 [arcmin] (formal 1-sigma fit error)
SNR: 20.4047295369859
Angular difference between the analysis and refined position is 2.301486 arcmin
Partial Coding Fraction: 0.1796875 [ including projection effects ]
Duration
T90: 34.4279999136925 +/- 12.7620332338538
Measured from: 0.240000009536743
to: 34.6679999232292 [s; relative to TRIGTIME]
T50: 7.45199990272522 +/- 2.1656962064588
Measured from: 4.44800001382828
to: 11.8999999165535 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.96399998664856
to: 5.96399998664856 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.20800000429153
to: 39.3240000009537 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.100622 1.566459 1.061250 0.327884
0.094459 0.098267 0.084345 0.069403 [error]
Peak 0.113015 0.166686 0.149282 0.061928
0.020282 0.022186 0.019076 0.015543 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 40.532 -1.208 39.324
T90 34.428 0.240 34.668
T50 7.452 4.448 11.900
Peak 1.000 4.964 5.964
====== 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 -1.646 -0.124 0.123 - - - 6.93e-03 -5.10e-04 5.08e-04 70.400 57
CPL -1.383 -0.250 0.540 113.799 -47.960 -113.799 9.51e-03 -2.98e-03 8.45e-03 69.550 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 -1.334 -0.225 0.231 - - - 3.40e-02 -4.40e-03 4.40e-03 63.630 57
CPL -1.334 -0.223 0.402 9999.260 -9999.260 -9999.260 3.41e-02 -3.41e-02 4.35e-02 63.630 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 4.11e-07 6.92e-07 8.84e-07 2.27e-06 2.61e-06 4.26e-06 erg/cm2
90%_error_low -4.89e-08 -5.16e-08 -8.41e-08 -4.24e-07 -2.02e-07 -4.99e-07 erg/cm2
90%_error_hi 5.04e-08 5.15e-08 8.38e-08 4.86e-07 2.03e-07 5.45e-07 erg/cm2
Peak flux PL 1.19e+00 1.33e+00 1.05e+00 1.38e+00 4.09e+00 4.96e+00 ph/cm2/s
90%_error_low -2.92e-01 -2.07e-01 -1.57e-01 -3.92e-01 -5.62e-01 -6.47e-01 ph/cm2/s
90%_error_hi 3.14e-01 2.03e-01 1.55e-01 4.81e-01 5.65e-01 6.50e-01 ph/cm2/s
Fluence CPL 3.96e-07 7.13e-07 8.97e-07 1.50e-06 2.56e-06 3.51e-06 erg/cm2
90%_error_low -5.67e-08 -6.38e-08 -8.85e-08 -7.68e-07 -2.26e-07 -7.95e-07 erg/cm2
90%_error_hi 5.74e-08 6.60e-08 9.01e-08 9.21e-07 2.24e-07 9.75e-07 erg/cm2
Peak flux CPL 7.15e-01 4.02e-01 1.65e-01 1.09e-01 1.31e+00 1.34e+00 ph/cm2/s
90%_error_low -4.33e-01 -2.44e-01 -8.26e-02 -1.09e-01 -7.92e-01 -8.13e-01 ph/cm2/s
90%_error_hi 5.04e-01 3.90e-01 2.73e-01 1.79e-01 8.02e-01 1.20e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 129.9601 -46.5834 0.0094 43.8791 -129.6911 3.1258982 20.405 TRIG_00759159 Foreground time interval of the image: -1.208 11.253 (delta_t = 12.461 [sec]) Background time interval of the image: -239.448 -1.208 (delta_t = 238.240 [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 -1.208 sec. to 39.324 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64563 ( -0.124262 0.123454 ) Norm@50keV : 6.93243E-03 ( -0.000510055 0.000507929 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 70.40 using 59 PHA bins. # Reduced chi-squared = 1.235 for 57 degrees of freedom # Null hypothesis probability = 1.094220e-01 Photon flux (15-150 keV) in 40.53 sec: 0.903938 ( -0.067198 0.067333 ) ph/cm2/s Energy fluence (15-150 keV) : 2.61467e-06 ( -2.02005e-07 2.03174e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.208 sec. to 39.324 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.38261 ( -0.249564 0.539686 ) Epeak [keV] : 113.799 ( -47.9969 -113.836 ) Norm@50keV : 9.50819E-03 ( -0.00297927 0.00845101 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.55 using 59 PHA bins. # Reduced chi-squared = 1.242 for 56 degrees of freedom # Null hypothesis probability = 1.054529e-01 Photon flux (15-150 keV) in 40.53 sec: 0.894229 ( -0.069609 0.069593 ) ph/cm2/s Energy fluence (15-150 keV) : 2.56299e-06 ( -2.26375e-07 2.23754e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.964 sec. to 5.964 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.33401 ( -0.225419 0.230561 ) Norm@50keV : 3.40342E-02 ( -0.00440283 0.00440226 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.63 using 59 PHA bins. # Reduced chi-squared = 1.116 for 57 degrees of freedom # Null hypothesis probability = 2.545853e-01 Photon flux (15-150 keV) in 1 sec: 4.08695 ( -0.56231 0.5654 ) ph/cm2/s Energy fluence (15-150 keV) : 3.33657e-07 ( -4.60496e-08 4.62524e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.964 sec. to 5.964 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.33381 ( -0.224588 0.401096 ) Epeak [keV] : 9999.26 ( -9999.35 -9999.35 ) Norm@50keV : 3.41492E-02 ( -0.0341537 0.04348 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.63 using 59 PHA bins. # Reduced chi-squared = 1.136 for 56 degrees of freedom # Null hypothesis probability = 2.257070e-01 Photon flux (15-150 keV) in 1 sec: 1.30844 ( -0.791681 0.80156 ) ph/cm2/s Energy fluence (15-150 keV) : 3.33987e-07 ( -4.55307e-08 4.09428e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 34.428 sec. Hardness ratio (energy fluence ratio) = 1.27846824401
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.1030401e-06 S(50-150 keV) = 1.5116332e-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 = -6.141360643394963E-01, IMY = 7.399646766812858E-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: -239.448000 -1.208000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5050 -40.6143 4.3 42.0 -119.5 2.0216 2.7 3.7 Vela X-1 170.2790 -60.6223 1.3 23.5 -163.7 2.1395 8.9 1.1 Cen X-3 186.6221 -62.7844 3.3 21.7 175.8 0.7778 3.5 1.3 GX 301-2 347.6896 -83.1688 3.2 55.0 165.6 4.4665 3.6 ------ UNKNOWN 189.0918 14.9142 2.7 56.3 -14.4 3.7561 4.2 ------ UNKNOWN 95.8025 -68.4390 2.6 54.3 -164.2 3.7477 4.5 ------ UNKNOWN 147.6375 -48.1788 2.6 31.8 -128.7 1.4055 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -1.208000 11.252600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5348 -40.5577 106.1 42.0 -119.4 0.0194 0.1 0.3 Vela X-1 170.3711 -60.7934 67.5 23.5 -164.0 0.0086 0.2 10.4 Cen X-3 186.7074 -62.6212 6.1 21.5 175.8 0.0955 1.9 9.1 GX 301-2 216.6860 -12.3145 2.6 36.1 32.7 0.3258 4.5 ------ UNKNOWN 192.6200 -40.7329 2.0 0.7 23.1 0.2480 5.6 ------ UNKNOWN 129.9601 -46.5834 0.6 43.9 -129.7 3.1260 20.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 71.652590 177.252590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5661 -40.5115 1.7 7.3 -25.0 0.8341 6.7 3.1 Vela X-1 170.3408 -60.6364 3.2 27.1 75.7 0.7004 3.6 1.1 Cen X-3 186.9259 -62.9306 0.0 35.1 78.4 0.0346 0.1 12.1 GX 301-2 36.2764 -76.3317 2.8 45.9 139.0 2.0673 4.1 ------ UNKNOWN 166.1897 3.4559 2.2 59.3 -17.0 4.3362 5.3 ------ UNKNOWN 163.8125 4.3582 3.0 59.0 -19.9 2.9489 3.8 ------ UNKNOWN