batgrbproduct Analysis for Trigger=722681
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): Fri Nov 18 17:23:21 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger722681/GCN5_download_cron
======================================================================
Trigger: 00722681 Segment: 000
BAT Trigger Time: 501088456 [s; MET]
Trigger Stop: 501088520 [s; MET]
UTC: 2016-11-17T15:13:58.826660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 140.040455710658 Dec: -51.1443218374962 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.05
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.05
Flight Position: [ source = BAT ]
RA: 140.040455710658 Dec: -51.1443218374962 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.992350207547 Dec: -51.1433483260168 [deg; J2000]
{ 09h 19m 58.2s , -51d 08' 36.1" }
+/- 3.80187382694073 [arcmin] (estimated 90% radius based on SNR)
+/- 2.39615589599296 [arcmin] (formal 1-sigma fit error)
SNR: 4.51388237062608
Angular difference between Flight and Ground position is 1.811731 arcmin
Partial Coding Fraction: 0.2929688 [ 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 0.402132 0.313866 -0.029028 0.054254
0.092388 0.094686 0.081735 0.070337 [error]
Peak 0.402132 0.313866 -0.029028 0.054254
0.092388 0.094686 0.081735 0.070337 [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 1.46e-07 1.34e-07 8.52e-08 8.29e-08 4.00e-07 4.48e-07 erg/cm2
Error 5.42e-08 5.19e-08 6.20e-08 1.30e-07 1.60e-07 2.27e-07 erg/cm2
Peak flux Power-law 7.55e-02 3.87e-02 1.23e-02 5.00e-03 1.29e-01 1.32e-01 ph/cm2/s
Error 2.85e-02 1.45e-02 8.67e-03 7.26e-03 4.20e-02 4.30e-02 ph/cm2/s
Fluence Cutoff-PL 1.63e-07 1.37e-07 4.17e-09 2.45e-13 3.05e-07 3.05e-07 erg/cm2
Error 7.14e-08 1.12e-07 4.17e-08 1.04e-08 1.23e-07 1.23e-07 erg/cm2
Peak flux Cutoff-PL 8.15e-02 4.26e-02 7.26e-04 2.18e-08 1.25e-01 1.25e-01 ph/cm2/s
Error 3.62e-02 3.30e-02 6.25e-03 7.92e-04 4.04e-02 4.04e-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 2.656 0.699 - - 5.96e-04 3.26e-04 64.390 57
CPL -8.806 0.000 22.3 0.0 4.92e+05 0.00e+00 61.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.656 0.699 - - 5.96e-04 3.26e-04 64.390 57
CPL -8.806 0.000 22.3 0.0 4.92e+05 0.00e+00 61.000 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
139.9924 -51.1433 0.0427 47.9 -22.9 0.8673 4.5 TRIG_00722681
------------------------------------------
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: 2.65593 ( -0.623368 0.774255 )
Norm@50keV : 5.96353E-04 ( -0.00031325 0.000339565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.339156e-01
Photon flux (15-150 keV) in 64 sec: 0.129297 ( -0.0419678 0.0420449 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00061e-07 ( -1.51391e-07 1.68838e-07 ) 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: -8.80621 ( )
Epeak [keV] : 22.2829 ( )
Norm@50keV : 4.92373E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.009486e-01
Photon flux (15-150 keV) in 64 sec: 0.124887 ( -0.0407945 0.040034 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04894e-07 ( -1.13108e-07 1.32143e-07 ) 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 : 5.00000 ( -6.57696 -5 )
beta : -3.82457 ( 3.8247 1.32662 )
Epeak [keV] : 21.7829 ( -5.12501 5.44822 )
Norm@50keV : 529.210 ( -158.317 2994.27 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.99 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.996017e-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] : 5.85593 (-1.48705 2.04248)
R^2/D10^2 : 0.563976 (-0.563976 1.56316)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.11 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 57 degrees of freedom
# Null hypothesis probability = 3.306144e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.587e-07 9.776e-08
25- 50 1.500e-07 9.568e-08
50-150 1.242e-08 1.084e-08
15-150 3.211e-07 1.956e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7349 (-9.82514 23.8037)
Norm : 1.45970 (-0.766128 1.68552)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.71 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.810358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.550e-07 8.881e-08
25- 50 1.444e-07 8.942e-08
50-150 4.956e-08 4.506e-08
15-150 3.489e-07 2.195e-07
Double BB
R1^2/D10^2 : 7.32791E-06 (-7.35321e-06 -7.35321e-06)
kT2 [keV] : 5.66971 (-1.41961 1.94616)
R2^2/D10^2 : 0.637123 (-0.455995 1.74801)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.76 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 55 degrees of freedom
# Reduced chi-squared = 1.110 for 55 degrees of freedom
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Null hypothesis probability = 2.661572e-01
# Null hypothesis probability = 2.670881e-01
# Null hypothesis probability = 3.070525e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.593e-07 4.925e-07
25- 50 1.496e-07 1.900e-06
50-150 1.733e-08 1.882e-06
15-150 3.263e-07 5.744e-06
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: 2.65593 ( -0.623368 0.774255 )
Norm@50keV : 5.96353E-04 ( -0.00031325 0.000339565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.39 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 57 degrees of freedom
# Null hypothesis probability = 2.339156e-01
Photon flux (15-150 keV) in 64 sec: 0.129297 ( -0.0419678 0.0420449 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.00061e-07 ( -1.51391e-07 1.68838e-07 ) 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: -8.80621 ( )
Epeak [keV] : 22.2829 ( )
Norm@50keV : 4.92373E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.009486e-01
Photon flux (15-150 keV) in 64 sec: 0.124887 ( -0.0407945 0.040034 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04894e-07 ( -1.13108e-07 1.32143e-07 ) 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 : 5.00000 ( -6.55429 -5 )
beta : -3.82457 ( 3.8247 1.32662 )
Epeak [keV] : 21.7829 ( -5.12501 5.44822 )
Norm@50keV : 529.210 ( -158.317 2994.27 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.99 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 55 degrees of freedom
# Null hypothesis probability = 2.996017e-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] : 5.85593 (-1.48705 2.04248)
R^2/D10^2 : 0.563976 (-0.563976 1.56316)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.11 using 59 PHA bins.
# Reduced chi-squared = 1.072 for 57 degrees of freedom
# Null hypothesis probability = 3.306144e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.587e-07 9.696e-08
25- 50 1.500e-07 9.453e-08
50-150 1.242e-08 1.058e-08
15-150 3.211e-07 1.944e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.7349 (-9.82514 23.8037)
Norm : 1.45970 (-0.766128 1.68552)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.71 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 57 degrees of freedom
# Null hypothesis probability = 2.810358e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.550e-07 9.607e-08
25- 50 1.444e-07 8.844e-08
50-150 4.956e-08 4.566e-08
15-150 3.489e-07 2.133e-07
Double BB
R1^2/D10^2 : 7.32791E-06 (-7.35321e-06 -7.35321e-06)
kT2 [keV] : 5.66971 (-1.41961 1.94616)
R2^2/D10^2 : 0.637123 (-0.455995 1.74801)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.76 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 55 degrees of freedom
# Reduced chi-squared = 1.110 for 55 degrees of freedom
# Reduced chi-squared = 1.086 for 55 degrees of freedom
# Null hypothesis probability = 2.661572e-01
# Null hypothesis probability = 2.670881e-01
# Null hypothesis probability = 3.070525e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.593e-07 6.198e-07
25- 50 1.496e-07 2.386e-06
50-150 1.733e-08 2.222e-06
15-150 3.263e-07 4.512e-06
Plot creation:
Fri Nov 18 17:29:44 EST 2016