batgrbproduct analysis for trigger=766194
batgrbproduct Analysis for Trigger=766194
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sat Aug 5 05:12:38 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger766194/GCN5_download_cron
======================================================================
Trigger: 00766194 Segment: 000
BAT Trigger Time: 523540916.864 [s; MET]
Trigger Stop: 523540929.024 [s; MET]
UTC: 2017-08-04T12:01:37.389340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 6.43307870586649 Dec: -64.7481285423807 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.82
Image Trigger?: NO
Rate S/N Ratio: 10 [ if not an image trigger ]
Image S/N Ratio: 8.82
Flight Position: [ source = BAT ]
RA: 6.43307870586649 Dec: -64.7481285423807 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 6.40422772090739 Dec: -64.7808134121066 [deg; J2000]
{ 00h 25m 37.0s , -64d 46' 50.9" }
+/- 1.34693296121298 [arcmin] (estimated 90% radius based on SNR)
+/- 0.507019202401743 [arcmin] (formal 1-sigma fit error)
SNR: 19.8764310919057
Angular difference between Flight and Ground position is 2.095365 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 43.3519999980927 +/- 9.76435642449647
Measured from: 3.80000007152557
to: 47.1520000696182 [s; relative to TRIGTIME]
T50: 17.5199999213219 +/- 3.24083756512033
Measured from: 12.608000099659
to: 30.1280000209808 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 25.0999999642372
to: 26.0999999642372 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.97999995946884
to: 60.8999999761581 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.615913 0.786670 0.566724 0.079685
0.050674 0.053409 0.047366 0.043163 [error]
Peak 0.038534 0.037650 0.013835 0.015381
0.006838 0.007384 0.006551 0.005593 [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 2.04e-07 3.39e-07 4.26e-07 1.07e-06 1.27e-06 2.04e-06 erg/cm2
Error 2.45e-08 2.59e-08 4.64e-08 2.40e-07 1.10e-07 2.82e-07 erg/cm2
Peak flux Power-law 4.15e-01 2.98e-01 1.42e-01 9.49e-02 9.01e-01 9.50e-01 ph/cm2/s
Error 1.09e-01 6.13e-02 5.29e-02 6.68e-02 1.79e-01 1.95e-01 ph/cm2/s
Fluence Cutoff-PL 1.87e-07 3.66e-07 4.34e-07 3.97e-07 1.20e-06 1.38e-06 erg/cm2
Error 2.83e-08 3.34e-08 5.14e-08 3.16e-07 1.22e-07 3.37e-07 erg/cm2
Peak flux Cutoff-PL 4.17e-01 2.98e-01 1.40e-01 9.20e-02 9.00e-01 9.48e-01 ph/cm2/s
Error 1.09e-01 9.80e-02 5.52e-02 9.18e-02 1.79e-01 2.26e-01 ph/cm2/s
Fluence Band 1.85e-07 3.63e-07 4.34e-07 4.23e-07 1.20e-06 1.42e-06 erg/cm2
Error -------- 3.28e-08 4.77e-08 -------- 1.22e-07 -------- erg/cm2
Peak flux Band 2.55e-01 2.26e-01 7.78e-02 3.48e-02 5.78e-01 5.94e-01 ph/cm2/s
Error -------- 8.11e-02 -------- -------- 1.73e-01 1.85e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.669 0.132 - - 2.32e-03 1.89e-04 57.760 57
CPL 0.989 0.564 69.4 43.8 5.34e-03 4.09e-03 52.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.074 0.397 - - 5.80e-03 1.64e-03 78.010 57
CPL 1.968 0.000 12.9 0.0 6.69e-03 0.00e+00 78.070 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: 27.584000 sec.
T50 in the 50-300 keV band: 15.040000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 58.920 1.980 60.900
T90 43.352 3.800 47.152
T50 17.520 12.608 30.128
Peak 1.000 25.100 26.100
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
6.4042 -64.7808 0.0096 32.4 -24.6 2.1971 19.9 TRIG_00766194
------------------------------------------
Foreground time interval of the image:
1.980 55.537 (delta_t = 53.557 [sec])
Background time interval of the image:
-196.463 1.980 (delta_t = 198.443 [sec])
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
Time interval is from 1.980 sec. to 60.900 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66873 ( -0.13123 0.13346 )
Norm@50keV : 2.31925E-03 ( -0.000189951 0.000188343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.76 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 57 degrees of freedom
# Null hypothesis probability = 4.468494e-01
Photon flux (15-150 keV) in 58.92 sec: 0.304734 ( -0.0233215 0.0233415 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26861e-06 ( -1.09645e-07 1.10763e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.980 sec. to 60.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.988739 ( -0.602534 0.524995 )
Epeak [keV] : 69.3969 ( -14.9309 72.6246 )
Norm@50keV : 5.33862E-03 ( -0.0024867 0.0057 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9404 for 56 degrees of freedom
# Null hypothesis probability = 6.018861e-01
Photon flux (15-150 keV) in 58.92 sec: 0.295809 ( -0.0243 0.024289 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19615e-06 ( -1.21328e-07 1.23337e-07 ) ergs/cm2
Band function
Time interval is from 1.980 sec. to 60.900 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.988822 ( -0.495305 1.45841 )
beta : -10.0000 ( 10 8.88178e-15 )
Epeak [keV] : 69.3904 ( -13.7531 72.5319 )
Norm@50keV : 5.33757E-03 ( -0.0024832 0.00570266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.67 using 59 PHA bins.
# Reduced chi-squared = 0.9575 for 55 degrees of freedom
# Null hypothesis probability = 5.643478e-01
Photon flux (15-150 keV) in 58.92 sec: 0.296943 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.19838e-06 ( -1.19797e-06 -1.24404e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.9380 (-1.17442 1.31086)
R^2/D10^2 : 5.67854E-02 (-0.0168417 0.023576)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.87 using 59 PHA bins.
# Reduced chi-squared = 1.454 for 57 degrees of freedom
# Null hypothesis probability = 1.423496e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.188e-07 1.732e-08
25- 50 4.070e-07 3.635e-08
50-150 4.295e-07 7.109e-08
15-150 9.553e-07 8.602e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 138.771 (-40.0393 -136.169)
Norm : 1.26605 (-0.111068 0.137909)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.49 using 59 PHA bins.
# Reduced chi-squared = 0.9385 for 57 degrees of freedom
# Null hypothesis probability = 6.073636e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.927e-07 2.098e-08
25- 50 3.531e-07 5.005e-08
50-150 6.743e-07 2.899e-07
15-150 1.220e-06 2.949e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.30168 (-1.60242 1.94676)
R1^2/D10^2 : 0.453888 (-0.261479 0.833901)
kT2 [keV] : 20.8242 (-4.02203 7.46567)
R2^2/D10^2 : 7.78194E-03 (-0.00546061 0.00801053)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.83 using 59 PHA bins.
# Reduced chi-squared = 0.9424 for 55 degrees of freedom
# Null hypothesis probability = 5.964559e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.886e-07 7.611e-08
25- 50 3.599e-07 1.281e-07
50-150 6.412e-07 3.005e-07
15-150 1.190e-06 4.111e-07
Peak spectrum fit
Power-law model
Time interval is from 25.100 sec. to 26.100 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07375 ( -0.372963 0.421272 )
Norm@50keV : 5.79963E-03 ( -0.00167688 0.00161015 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.01 using 59 PHA bins.
# Reduced chi-squared = 1.369 for 57 degrees of freedom
# Null hypothesis probability = 3.377066e-02
Photon flux (15-150 keV) in 1 sec: 0.900788 ( -0.179144 0.179181 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37561e-08 ( -1.35825e-08 1.43723e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.100 sec. to 26.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96756 ( )
Epeak [keV] : 12.8719 ( )
Norm@50keV : 6.69067E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.07 using 59 PHA bins.
# Reduced chi-squared = 1.394 for 56 degrees of freedom
# Null hypothesis probability = 2.728231e-02
Photon flux (15-150 keV) in 1 sec: 0.900467 ( -0.178807 0.178263 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.39984e-08 ( -2.1938e-08 1.38538e-08 ) ergs/cm2
Band function
Time interval is from 25.100 sec. to 26.100 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.51713 ( -4.51713 -4.51713 )
beta : -2.34455 ( -0.756826 0.504686 )
Epeak [keV] : 22.7688 ( -22.7688 6.42553 )
Norm@50keV : 832.625 ( -163.634 1.05241e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.72 using 59 PHA bins.
# Reduced chi-squared = 1.395 for 55 degrees of freedom
# Null hypothesis probability = 2.810789e-02
Photon flux (15-150 keV) in 1 sec: 0.577862 ( 6.42214 -0.171665 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2316e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.04304 (-1.58166 1.93198)
R^2/D10^2 : 0.995686 (-0.572371 1.36524)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.79 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 57 degrees of freedom
# Null hypothesis probability = 2.485182e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-08 4.188e-09
25- 50 2.066e-08 6.910e-09
50-150 5.521e-09 3.565e-09
15-150 3.787e-08 1.447e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.9322 (-20.7694 57.9215)
Norm : 5.23421 (-1.63513 2.61443)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.24 using 59 PHA bins.
# Reduced chi-squared = 1.373 for 57 degrees of freedom
# Null hypothesis probability = 3.244477e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.267e-08 3.555e-09
25- 50 1.792e-08 5.644e-09
50-150 1.671e-08 9.644e-09
15-150 4.730e-08 1.684e-08
Double BB
R1^2/D10^2 : 9.64328E-05 (-5.49369e-05 0.000310358)
kT2 [keV] : 7.20656 (-1.21914 1.71666)
R2^2/D10^2 : 1.44000 (-0.83135 2.0872)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.24 using 59 PHA bins.
#Fit statistic : Chi-Squared = 72.84 using 59 PHA bins.
#Fit statistic : Chi-Squared = 72.15 using 59 PHA bins.
# Reduced chi-squared = 1.423 for 55 degrees of freedom
# Reduced chi-squared = 1.324 for 55 degrees of freedom
# Reduced chi-squared = 1.312 for 55 degrees of freedom
# Null hypothesis probability = 2.141315e-02
# Null hypothesis probability = 5.393091e-02
# Null hypothesis probability = 6.025277e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.282e-08 9.105e-09
25- 50 1.858e-08 1.097e-08
50-150 1.140e-08 7.050e-09
15-150 4.280e-08 2.157e-08
Plot creation:
Sat Aug 5 05:17:51 EDT 2017