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 Sep 11 20:46:02 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger710050
======================================================================
Trigger: 00710050 Segment: 000
BAT Trigger Time: 494005622.016 [s; MET]
Trigger Stop: 494005630.208 [s; MET]
UTC: 2016-08-27T15:46:45.243300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 179.296328377896 Dec: -29.1593372498433 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.32
Image Trigger?: NO
Rate S/N Ratio: 10.9087121146357 [ if not an image trigger ]
Image S/N Ratio: 8.32
Analysis Position: [ source = BAT ]
RA: 179.296328377896 Dec: -29.1593372498433 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 179.278486347251 Dec: -29.1766705067513 [deg; J2000]
{ 11h 57m 06.8s , -29d 10' 36.0" }
+/- 2.53352754836256 [arcmin] (estimated 90% radius based on SNR)
+/- 1.54195014254919 [arcmin] (formal 1-sigma fit error)
SNR: 8.06060201186017
Angular difference between the analysis and refined position is 1.398353 arcmin
Partial Coding Fraction: 0.484375 [ including projection effects ]
Duration
T90: 14.0480000376701 +/- 5.57930464366449
Measured from: -4.03999996185303
to: 10.0080000758171 [s; relative to TRIGTIME]
T50: 6.48000001907349 +/- 2.89666291813697
Measured from: -0.391999959945679
to: 6.08800005912781 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.41200000047684
to: 3.41200000047684 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.95199996232986
to: 10.8880000114441 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.255940 0.351290 0.091776 -0.002663
0.040693 0.041947 0.035424 0.030841 [error]
Peak 0.041631 0.044917 0.001037 0.006815
0.009382 0.009775 0.008338 0.007258 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 19.840 -8.952 10.888
T90 14.048 -4.040 10.008
T50 6.480 -0.392 6.088
Peak 1.000 2.412 3.412
====== 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 -2.137 -0.307 0.278 - - - 2.11e-03 -4.59e-04 4.48e-04 55.780 57
CPL 0.243 -1.741 2.576 35.631 -10.943 8.395 5.92e-02 -5.92e-02 2.27e+00 49.820 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 -2.242 -0.627 0.510 - - - 4.88e-03 -2.09e-03 2.03e-03 64.310 57
CPL 0.818 -3.225 7.756 30.439 -23.917 -30.439 5.10e-01 -5.10e-01 5.58e+04 62.330 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 9.75e-08 1.22e-07 1.11e-07 1.76e-07 3.90e-07 5.06e-07 erg/cm2
90%_error_low -1.96e-08 -2.01e-08 -3.13e-08 -7.96e-08 -7.44e-08 -1.25e-07 erg/cm2
90%_error_hi 2.01e-08 1.99e-08 3.29e-08 1.14e-07 7.70e-08 1.51e-07 erg/cm2
Peak flux PL 4.12e-01 2.68e-01 1.13e-01 6.56e-02 8.27e-01 8.59e-01 ph/cm2/s
90%_error_low -1.44e-01 -8.28e-02 -5.81e-02 -6.56e-02 -2.37e-01 -2.50e-01 ph/cm2/s
90%_error_hi 1.49e-01 8.07e-02 6.53e-02 8.73e-02 2.37e-01 2.53e-01 ph/cm2/s
Fluence CPL 8.44e-08 1.56e-07 8.30e-08 7.48e-09 3.30e-07 3.31e-07 erg/cm2
90%_error_low -2.37e-08 -3.13e-08 -4.03e-08 -7.03e-09 -6.34e-08 -6.38e-08 erg/cm2
90%_error_hi 2.33e-08 3.21e-08 4.49e-08 5.53e-08 7.65e-08 8.79e-08 erg/cm2
Peak flux CPL 3.67e-01 3.64e-01 5.12e-02 3.52e-04 7.83e-01 7.83e-01 ph/cm2/s
90%_error_low -1.76e-01 N/A -5.12e-02 N/A -2.28e-01 -2.28e-01 ph/cm2/s
90%_error_hi 1.69e-01 N/A 1.04e-01 N/A 2.31e-01 2.32e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 179.2785 -29.1767 0.0238 32.9288 -52.7151 0.6946700 8.061 TRIG_00710050 Foreground time interval of the image: -8.952 10.888 (delta_t = 19.840 [sec]) Background time interval of the image: -239.016 -8.952 (delta_t = 230.064 [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 -8.952 sec. to 10.888 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.13667 ( -0.307117 0.277724 ) Norm@50keV : 2.10928E-03 ( -0.000458831 0.000447693 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.78 using 59 PHA bins. # Reduced chi-squared = 0.9786 for 57 degrees of freedom # Null hypothesis probability = 5.209822e-01 Photon flux (15-150 keV) in 19.84 sec: 0.338010 ( -0.053386 0.053386 ) ph/cm2/s Energy fluence (15-150 keV) : 3.90384e-07 ( -7.44022e-08 7.70088e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.952 sec. to 10.888 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.24279 ( -1.76952 2.54741 ) Epeak [keV] : 35.6306 ( -10.957 8.38036 ) Norm@50keV : 5.92231E-02 ( -0.0636059 2.26374 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.82 using 59 PHA bins. # Reduced chi-squared = 0.8896 for 56 degrees of freedom # Null hypothesis probability = 7.066803e-01 Photon flux (15-150 keV) in 19.84 sec: 0.319825 ( -0.053657 0.054116 ) ph/cm2/s Energy fluence (15-150 keV) : 3.30431e-07 ( -6.33942e-08 7.65382e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.412 sec. to 3.412 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.24224 ( -0.6276 0.509829 ) Norm@50keV : 4.88249E-03 ( -0.00208581 0.00203315 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.31 using 59 PHA bins. # Reduced chi-squared = 1.128 for 57 degrees of freedom # Null hypothesis probability = 2.360303e-01 Photon flux (15-150 keV) in 1 sec: 0.826782 ( -0.237157 0.237298 ) ph/cm2/s Energy fluence (15-150 keV) : 4.62083e-08 ( -1.6151e-08 1.74654e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.412 sec. to 3.412 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.79571 ( -3.27521 7.70596 ) Epeak [keV] : 30.7047 ( -23.9527 -30.4744 ) Norm@50keV : 2.27203 ( -2.17221 55817.8 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.26 using 59 PHA bins. # Reduced chi-squared = 1.112 for 56 degrees of freedom # Null hypothesis probability = 2.633753e-01 Photon flux (15-150 keV) in 1 sec: 0.782652 ( -0.227606 0.231018 ) ph/cm2/s Energy fluence (15-150 keV) : 3.63814e-08 ( -1.124e-08 1.88721e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 14.048 sec. Hardness ratio (energy fluence ratio) = 0.909640818108
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.1938645e-07 S(50-150 keV) = 1.7100035e-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 = 3.923276373385089E-01, IMY = 5.152845338359440E-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: -239.016000 -8.952000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5856 -40.5138 3.4 29.5 -128.5 1.0160 3.4 3.6 Vela X-1 170.4807 -60.4270 0.0 1.1 -51.4 0.3552 1.7 12.7 Cen X-3 186.6178 -62.7848 1.6 7.9 38.6 1.5410 7.1 1.4 GX 301-2 71.5346 -75.8080 2.4 33.4 138.2 1.7738 4.8 ------ UNKNOWN 221.6304 -23.2532 2.9 51.8 -1.3 2.1776 3.9 ------ UNKNOWN 136.6955 -54.7528 3.1 18.5 -151.7 0.8126 3.8 ------ UNKNOWN 104.8849 -45.1285 2.6 40.1 -164.7 1.5469 4.5 ------ UNKNOWN 174.5578 -36.8836 2.9 24.8 -59.0 1.0521 3.9 ------ UNKNOWN 188.5261 -20.9452 2.4 42.6 -41.7 1.7986 4.8 ------ UNKNOWN 175.7582 -16.9315 2.9 44.8 -59.9 4.3192 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -8.952000 10.888000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.3231 -40.6482 5.5 29.5 -129.0 0.1456 2.1 10.9 Vela X-1 169.9176 -60.5409 0.0 1.0 -65.5 0.1020 2.0 12.7 Cen X-3 187.0207 -62.7437 3.8 8.1 38.3 -0.1561 -3.1 10.1 GX 301-2 179.2785 -29.1766 1.4 32.9 -52.7 0.6947 8.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 515.084600 957.784600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 186.6450 -62.7617 30.0 54.0 -149.7 0.8819 0.4 0.6 GX 301-2 244.9803 -15.6459 0.3 17.3 -37.8 24.7137 46.0 0.3 Sco X-1 255.8003 -37.7810 7.7 7.8 176.7 0.7659 1.5 9.6 4U 1700-377 256.5462 -36.3660 5.1 6.5 170.9 1.2291 2.3 6.4 GX 349+2 263.0281 -24.6404 6.3 8.6 51.8 0.8790 1.8 6.4 GX 1+4 264.5408 -44.4707 8.9 16.2 154.7 0.7046 1.3 8.7 4U 1735-44 268.2489 -1.5972 0.0 30.8 24.0 -1.0579 -1.7 11.2 SW J1753.5-0127 270.2903 -25.0275 2.7 14.0 71.4 2.0595 4.2 3.1 GX 5-1 270.1533 -25.9014 0.0 13.6 74.6 0.2314 0.5 12.5 GRS 1758-258 274.0775 -14.0729 3.2 23.4 49.7 2.1785 3.7 4.7 GX 17+2 275.8733 -30.4688 5.0 17.6 95.3 1.4293 2.3 6.7 H1820-303 284.9438 -25.0750 5.9 26.5 85.1 -1.4166 -1.9 10.5 HT1900.1-2455 262.9698 -33.7853 3.8 7.4 121.4 1.4159 3.1 3.1 GX 354-0 298.5109 -41.3481 2.8 36.3 118.7 4.9214 4.1 ------ UNKNOWN 283.6799 5.0952 2.8 44.3 40.9 5.8645 4.2 ------ UNKNOWN 308.9796 -75.5696 3.2 52.3 163.8 7.7383 3.6 ------ UNKNOWN 259.7395 22.2392 2.3 52.4 3.5 6.7262 5.0 ------ UNKNOWN 253.8596 6.5372 3.0 36.5 -4.2 2.5432 3.8 ------ UNKNOWN 227.5354 -61.6347 2.7 36.6 -159.6 2.8541 4.3 ------ UNKNOWN