batgrbproduct analysis for trigger=937114
batgrbproduct Analysis for Trigger=937114
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 Nov 16 11:07:10 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger937114/GCN5_download_cron
======================================================================
Trigger: 00937114 Segment: 000
BAT Trigger Time: 595510004.736 [s; MET]
Trigger Stop: 595510005.76 [s; MET]
UTC: 2019-11-15T11:26:20.811120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 292.179401558879 Dec: 38.7305888139949 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.59
Image Trigger?: NO
Rate S/N Ratio: 18.3847763108502 [ if not an image trigger ]
Image S/N Ratio: 6.59
Flight Position: [ source = BAT ]
RA: 292.179401558879 Dec: 38.7305888139949 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 292.255024424252 Dec: 38.7743190624712 [deg; J2000]
{ 19h 29m 01.2s , +38d 46' 27.5" }
+/- 4.92162475991867 [arcmin] (estimated 90% radius based on SNR)
+/- 3.10587218499341 [arcmin] (formal 1-sigma fit error)
SNR: 3.12170567092302
Angular difference between Flight and Ground position is 4.405158 arcmin
Partial Coding Fraction: 0.4257812 [ including projection effects ]
Duration
T90: 1.02400004863739 +/-
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
T50: 1.02400004863739 +/-
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400004863739 second)
Measured from: -5.96046447753906e-08
to: 1.02399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400004863739 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.043148 0.016981 0.001644 -0.003182
0.009996 0.010264 0.009114 0.008469 [error]
Peak 0.043148 0.016981 0.001644 -0.003182
0.009996 0.010264 0.009114 0.008469 [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 1.32e-08 1.05e-08 5.59e-09 4.34e-09 3.13e-08 3.37e-08 erg/cm2
Error 5.46e-09 5.41e-09 6.45e-09 1.02e-08 1.55e-08 2.09e-08 erg/cm2
Peak flux Power-law 4.30e-01 1.91e-01 5.10e-02 1.68e-02 6.82e-01 6.89e-01 ph/cm2/s
Error 1.80e-01 9.46e-02 5.71e-02 3.60e-02 2.59e-01 2.64e-01 ph/cm2/s
Fluence Cutoff-PL 1.69e-08 6.52e-09 5.15e-12 6.02e-21 2.34e-08 2.34e-08 erg/cm2
Error 6.18e-09 4.49e-09 4.16e-10 0.00e+00 8.08e-09 8.08e-09 erg/cm2
Peak flux Cutoff-PL 5.34e-01 1.33e-01 5.14e-05 2.43e-14 6.67e-01 6.66e-01 ph/cm2/s
Error 2.01e-01 9.66e-02 4.46e-03 0.00e+00 2.25e-01 2.25e-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 2.907 0.976 - - 2.65e-03 2.03e-03 50.870 57
CPL 1.000 0.000 50.0 0.0 1.27e-02 0.00e+00 56.180 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.907 0.976 - - 2.65e-03 2.03e-03 50.870 57
CPL 1.000 0.000 50.0 0.0 1.27e-02 0.00e+00 56.180 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 -0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
292.2550 +38.7743 0.0618 44.3 -173.3 0.0629 3.1 TRIG_00937114
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.736 -4.736 (delta_t = 56.000 [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 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.90713 ( -0.830965 1.12149 )
Norm@50keV : 2.65067E-03 ( -0.00180468 0.0022561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.8924 for 57 degrees of freedom
# Null hypothesis probability = 7.031140e-01
Photon flux (15-150 keV) in 1.024 sec: 0.681912 ( -0.258064 0.260298 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12958e-08 ( -1.40153e-08 1.69211e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.26654E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.18 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 56 degrees of freedom
# Null hypothesis probability = 4.681094e-01
Photon flux (15-150 keV) in 1.024 sec: 0.667161 0.665598 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23554e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.94724 ( 3.36742 7.94724 )
beta : -2.90687 ( -1.12254 0.831771 )
Epeak [keV] : 55.2488 ( -55.2488 -55.2488 )
Norm@50keV : 0.360337 ( -0.245278 0.30664 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 55 degrees of freedom
# Null hypothesis probability = 6.332248e-01
Photon flux (15-150 keV) in 1.024 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] : 4.82494 (-1.27394 1.91701)
R^2/D10^2 : 7.10718 (-7.10719 25.1545)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.54 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 57 degrees of freedom
# Null hypothesis probability = 7.798766e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.531e-08 9.062e-09
25- 50 9.150e-09 6.144e-09
50-150 3.121e-10 3.462e-10
15-150 2.478e-08 1.491e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7735 (-7.74295 24.5261)
Norm : 11.2953 (-11.2953 22.9964)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.97 using 59 PHA bins.
# Reduced chi-squared = 0.8767 for 57 degrees of freedom
# Null hypothesis probability = 7.338180e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-08 8.550e-09
25- 50 1.018e-08 7.045e-09
50-150 1.982e-09 2.087e-09
15-150 2.640e-08 1.651e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.73942 (-4.73807 1.86103)
R1^2/D10^2 : 7.61116 (-7.61567 28.61)
kT2 [keV] : 83.9747 (-83.5 -83.5)
R2^2/D10^2 : 1.28526E-04 (-0.000130067 -0.000130067)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.92 using 59 PHA bins.
# Reduced chi-squared = 0.8713 for 55 degrees of freedom
# Null hypothesis probability = 7.395855e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.529e-08 9.211e-09
25- 50 9.214e-09 5.996e-09
50-150 9.637e-09 3.460e-09
15-150 3.414e-08 1.627e-08
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.90713 ( -0.830965 1.12149 )
Norm@50keV : 2.65067E-03 ( -0.00180468 0.0022561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.8924 for 57 degrees of freedom
# Null hypothesis probability = 7.031140e-01
Photon flux (15-150 keV) in 1.024 sec: 0.681912 ( -0.258064 0.260298 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12958e-08 ( -1.40153e-08 1.69211e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.26654E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.18 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 56 degrees of freedom
# Null hypothesis probability = 4.681094e-01
Photon flux (15-150 keV) in 1.024 sec: 0.667161 0.665598 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.23554e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.94724 ( 3.36742 7.94724 )
beta : -2.90687 ( -1.12254 0.831771 )
Epeak [keV] : 55.2488 ( -55.2488 -55.2488 )
Norm@50keV : 0.360337 ( -0.245278 0.30664 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.87 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 55 degrees of freedom
# Null hypothesis probability = 6.332248e-01
Photon flux (15-150 keV) in 1.024 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] : 4.82494 (-1.27394 1.91701)
R^2/D10^2 : 7.10718 (-7.10719 25.1545)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.54 using 59 PHA bins.
# Reduced chi-squared = 0.8516 for 57 degrees of freedom
# Null hypothesis probability = 7.798766e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.531e-08 9.231e-09
25- 50 9.150e-09 6.328e-09
50-150 3.121e-10 3.185e-10
15-150 2.478e-08 1.478e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.7735 (-7.74295 24.5261)
Norm : 11.2953 (-11.2953 22.9964)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.97 using 59 PHA bins.
# Reduced chi-squared = 0.8767 for 57 degrees of freedom
# Null hypothesis probability = 7.338180e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.423e-08 8.832e-09
25- 50 1.018e-08 6.548e-09
50-150 1.982e-09 2.177e-09
15-150 2.640e-08 1.677e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.73942 (-4.73807 1.86103)
R1^2/D10^2 : 7.61116 (-7.61567 28.61)
kT2 [keV] : 83.9747 (-83.5 -83.5)
R2^2/D10^2 : 1.28526E-04 (-0.000130067 -0.000130067)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.92 using 59 PHA bins.
# Reduced chi-squared = 0.8713 for 55 degrees of freedom
# Null hypothesis probability = 7.395855e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.529e-08 9.190e-09
25- 50 9.214e-09 6.328e-09
50-150 9.637e-09 7.450e-10
15-150 3.414e-08 1.576e-08
Plot creation:
Sat Nov 16 11:09:32 EST 2019