batgrbproduct analysis for trigger=758168
batgrbproduct Analysis for Trigger=758168
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 Jun 23 09:06:23 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger758168/GCN5_download_cron
======================================================================
Trigger: 00758168 Segment: 000
BAT Trigger Time: 519820384 [s; MET]
Trigger Stop: 519820704 [s; MET]
UTC: 2017-06-22T10:32:44.744620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 232.220929460489 Dec: 64.8706298535904 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.91
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.91
Flight Position: [ source = BAT ]
RA: 232.220929460489 Dec: 64.8706298535904 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 232.233963900891 Dec: 64.8843871689312 [deg; J2000]
{ 15h 28m 56.2s , +64d 53' 03.8" }
+/- 5.80944618321494 [arcmin] (estimated 90% radius based on SNR)
+/- 3.37059749285958 [arcmin] (formal 1-sigma fit error)
SNR: 2.46318671169568
Angular difference between Flight and Ground position is 0.889715 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.315929 0.179392 -0.107858 0.001830
0.087308 0.090295 0.079723 0.073979 [error]
Peak 0.315929 0.179392 -0.107858 0.001830
0.087308 0.090295 0.079723 0.073979 [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 9.08e-08 5.57e-08 2.17e-08 1.15e-08 1.74e-07 1.78e-07 erg/cm2
Error 3.85e-08 3.81e-08 3.12e-08 3.50e-08 9.97e-08 1.16e-07 erg/cm2
Peak flux Power-law 1.72e-02 6.08e-03 1.18e-03 2.68e-04 2.46e-02 2.44e-02 ph/cm2/s
Error 7.35e-03 3.93e-03 1.63e-03 7.49e-04 1.10e-02 1.12e-02 ph/cm2/s
Fluence Cutoff-PL 1.13e-07 5.50e-08 9.17e-11 6.96e-19 1.68e-07 1.68e-07 erg/cm2
Error 4.56e-08 5.74e-08 7.63e-09 0.00e+00 6.99e-08 7.00e-08 erg/cm2
Peak flux Cutoff-PL 2.05e-02 6.35e-03 4.15e-06 5.91e-15 2.69e-02 2.69e-02 ph/cm2/s
Error 8.60e-03 6.43e-03 4.47e-04 0.00e+00 1.02e-02 1.02e-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 3.399 1.165 - - 6.51e-05 7.69e-05 39.330 57
CPL -9.127 0.000 21.7 0.0 2.72e+05 0.00e+00 34.780 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.399 1.165 - - 6.51e-05 7.69e-05 39.330 57
CPL -9.127 0.000 21.7 0.0 2.72e+05 0.00e+00 34.780 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
232.2340 +64.8844 0.0786 27.3 -169.7 0.5370 2.5 TRIG_00758168
------------------------------------------
Foreground time interval of the image:
0.000 50.560 (delta_t = 50.560 [sec])
57.000 183.133 (delta_t = 126.133 [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
0.000000 50.560000
57.000000 183.132600
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39915 ( -0.880007 1.44987 )
Norm@50keV : 6.51288E-05 ( -6.60876e-05 8.77751e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.33 using 59 PHA bins.
# Reduced chi-squared = 0.6901 for 57 degrees of freedom
# Null hypothesis probability = 9.641342e-01
Photon flux (15-150 keV) in 176.7 sec: 2.46037E-02 ( -0.0107929 0.0112823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74418e-07 ( -8.73405e-08 1.12054e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 50.560000
57.000000 183.132600
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.12707 ( )
Epeak [keV] : 21.6690 ( )
Norm@50keV : 2.72411E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.78 using 59 PHA bins.
# Reduced chi-squared = 0.6211 for 56 degrees of freedom
# Null hypothesis probability = 9.883815e-01
Photon flux (15-150 keV) in 176.7 sec: 2.68923E-02 ( -0.0099771 0.0104246 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67913e-07 ( -6.55075e-08 7.43693e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 50.560000
57.000000 183.132600
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99232 ( -6.92031 -4.99232 )
beta : -9.37167 ( 9.37167 19.3119 )
Epeak [keV] : 21.2140 ( -4.91493 5.21211 )
Norm@50keV : 145.690 ( -54.4456 893.65 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.10 using 59 PHA bins.
# Reduced chi-squared = 0.6381 for 55 degrees of freedom
# Null hypothesis probability = 9.832574e-01
Photon flux (15-150 keV) in 176.7 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] : 4.85942 (-1.42151 1.81195)
R^2/D10^2 : 0.279135 (-0.277296 1.14892)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.78 using 59 PHA bins.
# Reduced chi-squared = 0.6278 for 57 degrees of freedom
# Null hypothesis probability = 9.875219e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-07 6.404e-08
25- 50 6.501e-08 4.717e-08
50-150 2.298e-09 2.587e-09
15-150 1.742e-07 1.098e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5040 (-6.55894 14.1047)
Norm : 0.532000 (-0.213038 0.213136)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.37 using 59 PHA bins.
# Reduced chi-squared = 0.6557 for 57 degrees of freedom
# Null hypothesis probability = 9.793608e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.952e-08 1.691e-07
25- 50 6.133e-08 1.803e-07
50-150 8.741e-09 1.020e-07
15-150 1.696e-07 5.024e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.83748 (-4.85081 -4.85081)
R1^2/D10^2 : 0.160479 (-0.160237 -0.160237)
kT2 [keV] : 4.90326 (-4.87437 -4.87437)
R2^2/D10^2 : 0.117295 (-0.116977 -0.116977)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.78 using 59 PHA bins.
# Reduced chi-squared = 0.6506 for 55 degrees of freedom
# Null hypothesis probability = 9.792227e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-07 1.685e+00
25- 50 6.526e-08 1.642e+01
50-150 2.325e-09 4.263e+02
15-150 1.745e-07 4.343e+02
Peak spectrum fit
Power-law model
Time interval is from 57.000 sec. to 183.133 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.39915 ( -0.880007 1.44987 )
Norm@50keV : 6.51288E-05 ( -6.60876e-05 8.77751e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.33 using 59 PHA bins.
# Reduced chi-squared = 0.6901 for 57 degrees of freedom
# Null hypothesis probability = 9.641342e-01
Photon flux (15-150 keV) in 176.7 sec: 2.46037E-02 ( -0.0107929 0.0112823 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74418e-07 ( -8.73405e-08 1.12054e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 57.000 sec. to 183.133 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.12707 ( )
Epeak [keV] : 21.6690 ( )
Norm@50keV : 2.72411E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.78 using 59 PHA bins.
# Reduced chi-squared = 0.6211 for 56 degrees of freedom
# Null hypothesis probability = 9.883815e-01
Photon flux (15-150 keV) in 176.7 sec: 2.68923E-02 ( -0.0099771 0.0104246 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.67913e-07 ( -6.55075e-08 7.43693e-08 ) ergs/cm2
Band function
Time interval is from 57.000 sec. to 183.133 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99232 ( -6.91715 -4.99232 )
beta : -9.37167 ( 9.37167 19.3119 )
Epeak [keV] : 21.2140 ( -4.91493 5.21211 )
Norm@50keV : 145.690 ( -54.4456 893.65 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.10 using 59 PHA bins.
# Reduced chi-squared = 0.6381 for 55 degrees of freedom
# Null hypothesis probability = 9.832574e-01
Photon flux (15-150 keV) in 176.7 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] : 4.85942 (-1.42151 1.81195)
R^2/D10^2 : 0.279135 (-0.277296 1.14892)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.78 using 59 PHA bins.
# Reduced chi-squared = 0.6278 for 57 degrees of freedom
# Null hypothesis probability = 9.875219e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-07 6.548e-08
25- 50 6.501e-08 4.433e-08
50-150 2.298e-09 2.746e-09
15-150 1.742e-07 1.083e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5040 (-6.55894 14.1047)
Norm : 0.532000 (-0.213038 0.213136)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.37 using 59 PHA bins.
# Reduced chi-squared = 0.6557 for 57 degrees of freedom
# Null hypothesis probability = 9.793608e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.952e-08 1.742e-07
25- 50 6.133e-08 1.809e-07
50-150 8.741e-09 1.082e-07
15-150 1.696e-07 4.618e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.83748 (-4.85081 -4.85081)
R1^2/D10^2 : 0.160479 (-0.160237 -0.160237)
kT2 [keV] : 4.90326 (-4.87437 -4.87437)
R2^2/D10^2 : 0.117295 (-0.116977 -0.116977)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.78 using 59 PHA bins.
# Reduced chi-squared = 0.6506 for 55 degrees of freedom
# Null hypothesis probability = 9.792227e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.069e-07 1.986e+00
25- 50 6.526e-08 1.661e+01
50-150 2.325e-09 3.788e+02
15-150 1.745e-07 4.122e+02
Plot creation:
Fri Jun 23 09:12:35 EDT 2017