batgrbproduct analysis for trigger=931484
batgrbproduct Analysis for Trigger=931484
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 Oct 26 20:12:14 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger931484/GCN5_download_cron
======================================================================
Trigger: 00931484 Segment: 000
BAT Trigger Time: 593720196.8 [s; MET]
Trigger Stop: 593720196.864 [s; MET]
UTC: 2019-10-25T18:16:12.990460 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 139.770966566081 Dec: 1.38387357342258 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.56
Image Trigger?: NO
Rate S/N Ratio: 8.42614977317636 [ if not an image trigger ]
Image S/N Ratio: 6.56
Flight Position: [ source = BAT ]
RA: 139.770966566081 Dec: 1.38387357342258 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.780955232271 Dec: 1.38940343655953 [deg; J2000]
{ 09h 19m 07.4s , +01d 23' 21.9" }
+/- 3.14388826421206 [arcmin] (estimated 90% radius based on SNR)
+/- 1.40112652219428 [arcmin] (formal 1-sigma fit error)
SNR: 5.92176393427376
Angular difference between Flight and Ground position is 0.684879 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 5.96046447753906e-08
to: 0.0640000700950623 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.002414 0.001895 0.005366 0.007714
0.001597 0.001660 0.001774 0.001752 [error]
Peak 0.002414 0.001895 0.005366 0.007714
0.001597 0.001660 0.001774 0.001752 [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 6.02e-12 8.78e-11 1.18e-09 1.38e-07 5.82e-09 1.39e-07 erg/cm2
Error 6.73e-11 3.00e-10 1.37e-09 1.05e-07 5.28e-09 1.06e-07 erg/cm2
Peak flux Power-law 2.83e-03 2.15e-02 1.44e-01 5.13e+00 5.15e-01 5.29e+00 ph/cm2/s
Error 3.29e-02 7.83e-02 1.74e-01 3.91e+00 4.99e-01 4.04e+00 ph/cm2/s
Fluence Cutoff-PL 7.90e-11 5.00e-10 8.00e-10 1.31e-10 1.48e-09 1.43e-09 erg/cm2
Error 3.37e-10 8.56e-10 1.39e-09 1.34e-08 2.95e-09 -------- erg/cm2
Peak flux Cutoff-PL 3.81e-02 1.27e-01 1.16e-01 1.51e-02 2.96e-01 2.98e-01 ph/cm2/s
Error 9.80e-02 2.31e-01 1.85e-01 -------- 2.88e-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 -1.756 1.314 - - 1.36e-03 3.14e-03 40.030 57
CPL -2.527 0.000 10000.0 0.0 7.47e-04 0.00e+00 39.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.756 1.314 - - 1.36e-03 3.14e-03 40.030 57
CPL -2.527 0.000 10000.0 0.0 7.47e-04 0.00e+00 39.070 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.7810 +1.3894 0.0326 17.0 156.9 0.0195 5.9 TRIG_00931484
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.800 -52.660 (delta_t = 8.140 [sec])
-51.800 -4.800 (delta_t = 47.000 [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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.75627 ( -0.768004 1.86 )
Norm@50keV : 1.36454E-03 ( -0.00137203 0.00490212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7023 for 57 degrees of freedom
# Null hypothesis probability = 9.570565e-01
Photon flux (15-150 keV) in 0.064 sec: 0.515267 ( -0.515267 0.482217 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.81941e-09 ( -5.81941e-09 4.7367e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.52693 ( )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 7.46513E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.07 using 59 PHA bins.
# Reduced chi-squared = 0.6977 for 56 degrees of freedom
# Null hypothesis probability = 9.583762e-01
Photon flux (15-150 keV) in 0.064 sec: 0.296349 0.254472 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.5178e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.00000 ( 10 10 )
beta : 1.73592 ( -1.85629 0.765086 )
Epeak [keV] : 16.9196 ( -16.9196 -16.9196 )
Norm@50keV : 0.192396 ( -0.189256 0.662627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7278 for 55 degrees of freedom
# Null hypothesis probability = 9.353564e-01
Photon flux (15-150 keV) in 0.064 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] : 200.000 (-198.657 -200)
R^2/D10^2 : 3.94370E-04 (-0.000220372 -0.000394241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.57 using 59 PHA bins.
# Reduced chi-squared = 0.7293 for 57 degrees of freedom
# Null hypothesis probability = 9.378535e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.917e-10 5.802e-10
25- 50 3.985e-10 2.978e-10
50-150 9.638e-12 1.437e-11
15-150 1.200e-09 8.848e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 3.07980 (-2.20283 2.20289)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.93 using 59 PHA bins.
# Reduced chi-squared = 0.7883 for 57 degrees of freedom
# Null hypothesis probability = 8.765431e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.908e-10 3.658e-10
25- 50 9.441e-10 7.322e-10
50-150 2.071e-09 1.533e-09
15-150 3.506e-09 2.575e-09
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.93003 (-3.63276 3.37404)
R1^2/D10^2 : 13.5037 (-10.7097 51.3842)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 3.77351E-04 (-0.000220775 0.000220941)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.70 using 59 PHA bins.
# Reduced chi-squared = 0.7039 for 55 degrees of freedom
# Reduced chi-squared = 0.7036 for 55 degrees of freedom
# Null hypothesis probability = 9.529835e-01
# Null hypothesis probability = 9.531790e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.475e-10 4.838e-10
25- 50 5.460e-10 2.725e-10
50-150 6.353e-09 1.826e-09
15-150 7.647e-09 2.356e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.75627 ( -0.768004 1.86 )
Norm@50keV : 1.36454E-03 ( -0.00137203 0.00490212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7023 for 57 degrees of freedom
# Null hypothesis probability = 9.570565e-01
Photon flux (15-150 keV) in 0.064 sec: 0.515267 ( -0.515267 0.482217 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.81941e-09 ( -5.81941e-09 4.7367e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.52693 ( )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 7.46513E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.07 using 59 PHA bins.
# Reduced chi-squared = 0.6977 for 56 degrees of freedom
# Null hypothesis probability = 9.583762e-01
Photon flux (15-150 keV) in 0.064 sec: 0.296349 0.254472 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.5178e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -10.00000 ( 10 10 )
beta : 1.73592 ( -1.85629 0.765086 )
Epeak [keV] : 16.9196 ( -16.9196 -16.9196 )
Norm@50keV : 0.192396 ( -0.189256 0.662627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7278 for 55 degrees of freedom
# Null hypothesis probability = 9.353564e-01
Photon flux (15-150 keV) in 0.064 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] : 200.000 (-198.657 -200)
R^2/D10^2 : 3.94370E-04 (-0.000220372 -0.000394241)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.57 using 59 PHA bins.
# Reduced chi-squared = 0.7293 for 57 degrees of freedom
# Null hypothesis probability = 9.378535e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.917e-10 5.142e-10
25- 50 3.985e-10 2.865e-10
50-150 9.638e-12 1.166e-11
15-150 1.200e-09 9.306e-10
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 3.07980 (-2.20283 2.20289)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.93 using 59 PHA bins.
# Reduced chi-squared = 0.7883 for 57 degrees of freedom
# Null hypothesis probability = 8.765431e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.908e-10 3.744e-10
25- 50 9.441e-10 6.995e-10
50-150 2.071e-09 1.536e-09
15-150 3.506e-09 2.589e-09
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.93003 (-3.64186 3.3748)
R1^2/D10^2 : 13.5037 (-10.7097 48.1502)
kT2 [keV] : 200.000 (-142.561 -200)
R2^2/D10^2 : 3.77351E-04 (-0.000220775 0.000220941)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 38.70 using 59 PHA bins.
# Reduced chi-squared = 0.7039 for 55 degrees of freedom
# Reduced chi-squared = 0.7036 for 55 degrees of freedom
# Null hypothesis probability = 9.529835e-01
# Null hypothesis probability = 9.531790e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.475e-10 4.925e-10
25- 50 5.460e-10 2.121e-10
50-150 6.353e-09 1.827e-09
15-150 7.647e-09 1.966e-09
Plot creation:
Sat Oct 26 20:14:59 EDT 2019