batgrbproduct analysis for trigger=765783
batgrbproduct Analysis for Trigger=765783
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): Wed Aug 2 15:46:35 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger765783/GCN5_download_cron
======================================================================
Trigger: 00765783 Segment: 000
BAT Trigger Time: 523299816 [s; MET]
Trigger Stop: 523299880 [s; MET]
UTC: 2017-08-01T17:03:16.539640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.480824023386 Dec: -17.3077662846383 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.86
Flight Position: [ source = BAT ]
RA: 290.480824023386 Dec: -17.3077662846383 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.527819870746 Dec: -17.3103131935068 [deg; J2000]
{ 19h 22m 06.7s , -17d 18' 37.1" }
+/- 3.53307849719919 [arcmin] (estimated 90% radius based on SNR)
+/- 2.63174399749705 [arcmin] (formal 1-sigma fit error)
SNR: 5.0123600083748
Angular difference between Flight and Ground position is 2.696389 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.224844 0.173830 -0.022248 0.032469
0.056183 0.052939 0.044403 0.039436 [error]
Peak 0.224844 0.173830 -0.022248 0.032469
0.056183 0.052939 0.044403 0.039436 [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 6.24e-08 5.16e-08 2.90e-08 2.41e-08 1.54e-07 1.68e-07 erg/cm2
Error 2.34e-08 2.42e-08 3.01e-08 4.50e-08 7.08e-08 9.42e-08 erg/cm2
Peak flux Power-law 3.24e-02 1.50e-02 4.21e-03 1.48e-03 5.24e-02 5.31e-02 ph/cm2/s
Error 1.23e-02 6.77e-03 4.28e-03 2.56e-03 1.88e-02 1.91e-02 ph/cm2/s
Fluence Cutoff-PL 6.81e-08 6.10e-08 3.13e-10 2.08e-17 1.30e-07 1.30e-07 erg/cm2
Error 2.58e-08 3.24e-08 5.71e-09 5.74e-11 4.27e-08 4.29e-08 erg/cm2
Peak flux Cutoff-PL 3.31e-02 1.97e-02 5.89e-05 2.12e-12 5.29e-02 5.28e-02 ph/cm2/s
Error 1.29e-02 9.63e-03 9.40e-04 5.72e-06 1.65e-02 1.65e-02 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 2.821 0.802 - - 2.17e-04 1.45e-04 48.500 57
CPL -9.889 -0.426 24.8 3.9 4.60e+05 1.51e+06 41.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.821 0.802 - - 2.17e-04 1.45e-04 48.500 57
CPL -9.889 -0.426 24.8 3.9 4.60e+05 1.51e+06 41.450 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.5278 -17.3103 0.0384 15.5 102.8 0.5488 5.0 TRIG_00765783
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.82143 ( -0.691983 0.91301 )
Norm@50keV : 2.16646E-04 ( -0.000132919 0.000157034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.50 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 57 degrees of freedom
# Null hypothesis probability = 7.810469e-01
Photon flux (15-150 keV) in 64 sec: 5.24363E-02 ( -0.0186774 0.0189765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53674e-07 ( -6.52154e-08 7.64314e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.88917 ( 9.91333 9.06093 )
Epeak [keV] : 24.7586 ( -4.14262 3.60843 )
Norm@50keV : 4.59664E+05 ( -501059 2.51748e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.45 using 59 PHA bins.
# Reduced chi-squared = 0.7402 for 56 degrees of freedom
# Null hypothesis probability = 9.266751e-01
Photon flux (15-150 keV) in 64 sec: 5.28582E-02 5.25862E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12272e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97056 ( -4.87986 -4.97056 )
beta : -9.98243 ( 9.98243 19.9404 )
Epeak [keV] : 24.4317 ( -4.35507 4.82133 )
Norm@50keV : 101.569 ( -31.5446 329.652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.25 using 59 PHA bins.
# Reduced chi-squared = 0.7682 for 55 degrees of freedom
# Null hypothesis probability = 8.961521e-01
Photon flux (15-150 keV) in 64 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] : 5.85833 (-1.37547 1.73809)
R^2/D10^2 : 0.244399 (-0.244399 0.54865)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.47 using 59 PHA bins.
# Reduced chi-squared = 0.7627 for 57 degrees of freedom
# Null hypothesis probability = 9.065573e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.886e-08 4.147e-08
25- 50 6.516e-08 3.987e-08
50-150 5.405e-09 5.059e-09
15-150 1.394e-07 8.294e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.0864 (-8.58375 18.7732)
Norm : 0.703988 (-0.373734 0.817013)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8104 for 57 degrees of freedom
# Null hypothesis probability = 8.462952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.709e-08 4.029e-08
25- 50 5.663e-08 3.670e-08
50-150 1.566e-08 1.673e-08
15-150 1.394e-07 8.790e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.89732 (-5.88134 43.5805)
R1^2/D10^2 : 0.188892 (-0.190475 -0.190475)
kT2 [keV] : 5.83689 (-5.85342 -5.85342)
R2^2/D10^2 : 5.07170E-02 (-0.0528035 -0.0528035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.48 using 59 PHA bins.
# Reduced chi-squared = 0.7905 for 55 degrees of freedom
# Null hypothesis probability = 8.690251e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.858e-08 1.600e+00
25- 50 6.555e-08 1.324e+01
50-150 5.542e-09 3.096e+02
15-150 1.397e-07 3.498e+02
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.82143 ( -0.691983 0.91301 )
Norm@50keV : 2.16646E-04 ( -0.000132919 0.000157034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.50 using 59 PHA bins.
# Reduced chi-squared = 0.8510 for 57 degrees of freedom
# Null hypothesis probability = 7.810469e-01
Photon flux (15-150 keV) in 64 sec: 5.24363E-02 ( -0.0186774 0.0189765 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.53674e-07 ( -6.52154e-08 7.64314e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.88917 ( 9.91333 9.06093 )
Epeak [keV] : 24.7586 ( -4.09033 3.61381 )
Norm@50keV : 4.59664E+05 ( -501059 2.51748e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.45 using 59 PHA bins.
# Reduced chi-squared = 0.7402 for 56 degrees of freedom
# Null hypothesis probability = 9.266751e-01
Photon flux (15-150 keV) in 64 sec: 5.28582E-02 5.25862E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.12272e-18 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97056 ( -4.84323 -4.97056 )
beta : -9.98243 ( 9.98243 19.9404 )
Epeak [keV] : 24.4317 ( -4.35507 4.82133 )
Norm@50keV : 101.569 ( -31.5446 329.652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.25 using 59 PHA bins.
# Reduced chi-squared = 0.7682 for 55 degrees of freedom
# Null hypothesis probability = 8.961521e-01
Photon flux (15-150 keV) in 64 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] : 5.85833 (-1.37547 1.73809)
R^2/D10^2 : 0.244399 (-0.244399 0.54865)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.47 using 59 PHA bins.
# Reduced chi-squared = 0.7627 for 57 degrees of freedom
# Null hypothesis probability = 9.065573e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.886e-08 4.109e-08
25- 50 6.516e-08 4.115e-08
50-150 5.405e-09 5.117e-09
15-150 1.394e-07 8.502e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.0864 (-8.58375 18.7732)
Norm : 0.703988 (-0.373734 0.817013)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8104 for 57 degrees of freedom
# Null hypothesis probability = 8.462952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.709e-08 4.101e-08
25- 50 5.663e-08 3.654e-08
50-150 1.566e-08 1.540e-08
15-150 1.394e-07 8.981e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.89732 (-5.88134 43.5805)
R1^2/D10^2 : 0.188892 (-0.190475 -0.190475)
kT2 [keV] : 5.83689 (-5.85342 -5.85342)
R2^2/D10^2 : 5.07170E-02 (-0.0528035 -0.0528035)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.48 using 59 PHA bins.
# Reduced chi-squared = 0.7905 for 55 degrees of freedom
# Null hypothesis probability = 8.690251e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.858e-08 1.617e+00
25- 50 6.555e-08 1.335e+01
50-150 5.542e-09 3.357e+02
15-150 1.397e-07 3.309e+02
Plot creation:
Wed Aug 2 15:52:15 EDT 2017