batgrbproduct Analysis for Trigger=711914
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Wed Sep 14 05:58:41 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger711914/batgroup_hand_proc
======================================================================
Trigger: 00711914 Segment: 000
BAT Trigger Time: 495389280 [s; MET]
Trigger Stop: 495389344 [s; MET]
UTC: 2016-09-12T16:07:43.149340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 301.518010297722 Dec: 57.543460509347 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.97
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.97
Flight Position: [ source = BAT ]
RA: 301.518010297722 Dec: 57.543460509347 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 301.594600589957 Dec: 57.5846529995438 [deg; J2000]
{ 20h 06m 22.7s , +57d 35' 04.8" }
+/- 2.71753129859677 [arcmin] (estimated 90% radius based on SNR)
+/- 1.86577677992794 [arcmin] (formal 1-sigma fit error)
SNR: 7.29237537984793
Angular difference between Flight and Ground position is 3.490516 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 253.695999920368 +/- 312.675815695994
Measured from: -19.527999997139
to: 234.167999923229 [s; relative to TRIGTIME]
T50: 27.9879999160767 +/- 125.167825869546
Measured from: 146.600000023842
to: 174.587999939919 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 148.56400001049
to: 149.56400001049 [s; relative to TRIGTIME]
Total Fluence
Measured from: -33.1119999885559
to: 605.167999982834 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.770360 2.117833 1.604022 0.492121
0.132855 0.135790 0.127197 0.132206 [error]
Peak 0.052354 0.078214 0.057238 0.017012
0.007220 0.007923 0.007423 0.006990 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== 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 Power-law 4.99e-07 9.04e-07 1.26e-06 3.65e-06 3.61e-06 6.31e-06 erg/cm2
Error 6.18e-08 6.61e-08 1.29e-07 8.17e-07 3.03e-07 9.16e-07 erg/cm2
Peak flux Power-law 4.69e-01 5.29e-01 4.27e-01 5.74e-01 1.64e+00 2.00e+00 ph/cm2/s
Error 9.56e-02 6.51e-02 6.23e-02 1.77e-01 1.86e-01 2.46e-01 ph/cm2/s
Fluence Cutoff-PL 4.91e-07 9.14e-07 1.26e-06 3.06e-06 3.58e-06 5.71e-06 erg/cm2
Error 7.16e-08 7.74e-08 1.33e-07 1.57e-06 3.47e-07 1.52e-06 erg/cm2
Peak flux Cutoff-PL 4.71e-01 5.30e-01 4.26e-01 5.65e-01 1.64e+00 1.99e+00 ph/cm2/s
Error 9.58e-02 6.48e-02 6.19e-02 1.85e-01 1.86e-01 2.79e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.524 0.136 - - 9.67e-04 7.23e-05 37.270 57
CPL 1.422 0.399 276.4 0.0 1.09e-03 6.67e-04 37.160 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.309 0.205 - - 1.37e-02 1.58e-03 50.420 57
CPL 1.305 0.615 9999.3 0.0 1.37e-02 1.22e-02 50.430 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 58.048000 sec.
T50 in the 50-300 keV band: 24.256000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 638.280 -33.112 605.168
T90 253.696 -19.528 234.168
T50 27.988 146.600 174.588
Peak 1.000 148.564 149.564
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
301.5946 57.5847 0.0264 22.3998 -24.9261 1.3807819 7.292 TRIG_00711914
Foreground time interval of the image:
-15.099 73.301 (delta_t = 88.400 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of 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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Multiple GTIs in the spectrum
tstart tstop
-33.112000 337.511500
361.000200 365.720000
421.000000 430.094900
482.000000 482.318100
541.000000 547.816500
601.000000 605.168000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52394 ( -0.13465 0.136354 )
Norm@50keV : 9.66596E-04 ( -7.25468e-05 7.19791e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.27 using 59 PHA bins.
# Reduced chi-squared = 0.6538 for 57 degrees of freedom
# Null hypothesis probability = 9.800276e-01
Photon flux (15-150 keV) in 395.7 sec: 0.121463 ( -0.00869082 0.00870377 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.61466e-06 ( -3.01495e-07 3.05327e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-33.112000 337.511500
361.000200 365.720000
421.000000 430.094900
482.000000 482.318100
541.000000 547.816500
601.000000 605.168000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42191 ( -0.569679 0.227493 )
Epeak [keV] : 276.418 ( -276.418 -276.418 )
Norm@50keV : 1.09021E-03 ( -0.000321185 0.0010129 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.16 using 59 PHA bins.
# Reduced chi-squared = 0.6635 for 56 degrees of freedom
# Null hypothesis probability = 9.754013e-01
Photon flux (15-150 keV) in 395.7 sec: 0.120706 ( -0.00949 0.009209 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57841e-06 ( -3.58825e-07 3.342e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-33.112000 337.511500
361.000200 365.720000
421.000000 430.094900
482.000000 482.318100
541.000000 547.816500
601.000000 605.168000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.34795 ( 1.26869 1.26869 )
beta : -1.58483 ( 1.60247 0.210745 )
Epeak [keV] : 156.607 ( -123.989 -123.989 )
Norm@50keV : 1.21105E-03 ( -0.000304925 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.14 using 59 PHA bins.
# Reduced chi-squared = 0.6752 for 55 degrees of freedom
# Null hypothesis probability = 9.690824e-01
Photon flux (15-150 keV) in 395.7 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.2218 (-1.29402 1.45673)
R^2/D10^2 : 1.60591E-02 (-0.00464237 0.00641334)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.67 using 59 PHA bins.
# Reduced chi-squared = 1.380 for 57 degrees of freedom
# Null hypothesis probability = 3.017660e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.711e-07 3.943e-08
25- 50 1.024e-06 9.042e-08
50-150 1.375e-06 2.224e-07
15-150 2.669e-06 2.418e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-56.1241 -199.363)
Norm : 0.492911 (-0.0347374 0.0347379)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.65 using 59 PHA bins.
# Reduced chi-squared = 0.6606 for 57 degrees of freedom
# Null hypothesis probability = 9.775684e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.857e-07 4.966e-08
25- 50 9.343e-07 1.258e-07
50-150 2.049e-06 7.138e-07
15-150 3.469e-06 8.644e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.89913 (-2.70837 2.44029)
R1^2/D10^2 : 0.127732 (-0.0758694 0.681875)
kT2 [keV] : 25.5562 (-7.12853 17.624)
R2^2/D10^2 : 1.65228E-03 (-0.0013296 0.00399648)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
# Reduced chi-squared = 0.7590 for 55 degrees of freedom
# Null hypothesis probability = 9.061412e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.539e-07 1.561e-07
25- 50 9.272e-07 2.750e-07
50-150 2.109e-06 1.057e-06
15-150 3.490e-06 1.214e-06
Peak spectrum fit
Power-law model
Time interval is from 148.564 sec. to 149.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30921 ( -0.205302 0.204937 )
Norm@50keV : 1.36883E-02 ( -0.00158511 0.0015759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.42 using 59 PHA bins.
# Reduced chi-squared = 0.8845 for 57 degrees of freedom
# Null hypothesis probability = 7.187286e-01
Photon flux (15-150 keV) in 1 sec: 1.63585 ( -0.185891 0.18599 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34964e-07 ( -1.8012e-08 1.82774e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 148.564 sec. to 149.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30461 ( -0.502132 0.727223 )
Epeak [keV] : 9999.34 ( -9999.36 -9999.36 )
Norm@50keV : 1.37462E-02 ( -0.0137455 0.010669 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.43 using 59 PHA bins.
# Reduced chi-squared = 0.9005 for 56 degrees of freedom
# Null hypothesis probability = 6.849213e-01
Photon flux (15-150 keV) in 1 sec: 1.63587 ( -0.18565 0.1854 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34159e-07 ( -1.7287e-08 1.8734e-08 ) ergs/cm2
Band function
Time interval is from 148.564 sec. to 149.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96388 ( -4.96388 -4.96388 )
beta : -1.37387 ( -0.245737 0.225489 )
Epeak [keV] : 23.6478 ( -23.6478 6.64889 )
Norm@50keV : 1637.84 ( -184.311 4.84211e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.42 using 59 PHA bins.
# Reduced chi-squared = 0.8985 for 55 degrees of freedom
# Null hypothesis probability = 6.870161e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4319 (-2.5462 3.30917)
R^2/D10^2 : 0.168673 (-0.0796462 0.142351)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 77.02 using 59 PHA bins.
# Reduced chi-squared = 1.351 for 57 degrees of freedom
# Null hypothesis probability = 3.980582e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.368e-09 2.054e-09
25- 50 3.411e-08 6.030e-09
50-150 5.597e-08 1.364e-08
15-150 9.846e-08 1.551e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-45.9287 -200)
Norm : 6.62163 (-0.759348 0.759348)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.90 using 59 PHA bins.
# Reduced chi-squared = 0.9631 for 57 degrees of freedom
# Null hypothesis probability = 5.543226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.659e-08 9.280e-09
25- 50 3.191e-08 1.756e-08
50-150 6.998e-08 3.858e-08
15-150 1.185e-07 6.435e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.96611 (-1.98946 2.41346)
R1^2/D10^2 : 1.19672 (-0.672612 1.85838)
kT2 [keV] : 47.4637 (-20.2678 -48.78)
R2^2/D10^2 : 4.13383E-03 (-0.00362538 0.0142872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.54 using 59 PHA bins.
# Reduced chi-squared = 0.8643 for 55 degrees of freedom
# Null hypothesis probability = 7.524082e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.475e-08 7.803e-09
25- 50 3.134e-08 1.430e-08
50-150 9.379e-08 5.158e-08
15-150 1.399e-07 6.399e-08
Plot creation:
Wed Sep 14 06:25:02 EDT 2016