batgrbproduct analysis for trigger=911102
batgrbproduct Analysis for Trigger=911102
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): Tue Jun 25 17:09:23 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger911102/GCN5_download_cron
======================================================================
Trigger: 00911102 Segment: 000
BAT Trigger Time: 583101664 [s; MET]
Trigger Stop: 583101760 [s; MET]
UTC: 2019-06-24T20:40:40.869800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 144.523920853963 Dec: 46.4760951265148 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.17
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.17
Flight Position: [ source = BAT ]
RA: 144.523920853963 Dec: 46.4760951265148 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 144.536827372544 Dec: 46.5164751006431 [deg; J2000]
{ 09h 38m 08.8s , +46d 30' 59.3" }
+/- 3.53772664088177 [arcmin] (estimated 90% radius based on SNR)
+/- 2.00343684986174 [arcmin] (formal 1-sigma fit error)
SNR: 5.00295461060855
Angular difference between Flight and Ground position is 2.480754 arcmin
Partial Coding Fraction: 0.4453125 [ including projection effects ]
Duration
T90: 96 +/-
Measured from: 0
to: 96 [s; relative to TRIGTIME]
T50: 96 +/-
Measured from: 0
to: 96 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 96 second)
Measured from: 0
to: 96 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 96 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.462428 0.422833 0.130386 0.171952
0.103600 0.106235 0.092788 0.081209 [error]
Peak 0.462428 0.422833 0.130386 0.171952
0.103600 0.106235 0.092788 0.081209 [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 1.61e-07 1.84e-07 1.51e-07 2.06e-07 5.71e-07 7.03e-07 erg/cm2
Error 5.06e-08 5.28e-08 7.67e-08 2.36e-07 1.87e-07 3.12e-07 erg/cm2
Peak flux Power-law 5.51e-02 3.49e-02 1.43e-02 7.93e-03 1.08e-01 1.12e-01 ph/cm2/s
Error 1.76e-02 9.77e-03 7.05e-03 8.58e-03 2.85e-02 3.01e-02 ph/cm2/s
Fluence Cutoff-PL 1.64e-07 2.30e-07 2.85e-08 5.23e-11 4.24e-07 4.21e-07 erg/cm2
Error 6.15e-08 9.74e-08 8.51e-08 3.84e-08 1.70e-07 1.74e-07 erg/cm2
Peak flux Cutoff-PL 5.41e-02 4.53e-02 3.19e-03 3.09e-06 1.03e-01 1.02e-01 ph/cm2/s
Error 2.04e-02 1.61e-02 8.33e-03 1.81e-03 2.87e-02 2.87e-02 ph/cm2/s
Fluence Band 1.72e-07 2.17e-07 9.05e-08 5.04e-08 5.07e-07 5.32e-07 erg/cm2
Error 5.51e-08 6.98e-08 -------- -------- -------- -------- 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 2.288 0.496 - - 6.24e-04 2.40e-04 51.300 57
CPL -2.252 0.935 27.8 15.3 9.24e-01 1.87e+06 47.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.288 0.496 - - 6.24e-04 2.40e-04 51.300 57
CPL -2.252 0.935 27.8 15.3 9.24e-01 1.87e+06 47.320 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 96.000 0.000 96.000
T90 96.000 0.000 96.000
T50 96.000 0.000 96.000
Peak 96.000 0.000 96.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
144.5368 +46.5165 0.0383 38.4 -49.8 1.3904 5.0 TRIG_00911102
------------------------------------------
Foreground time interval of the image:
0.000 96.000 (delta_t = 96.000 [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 96.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28848 ( -0.455909 0.535144 )
Norm@50keV : 6.24172E-04 ( -0.000239611 0.000239913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.30 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 57 degrees of freedom
# Null hypothesis probability = 6.876893e-01
Photon flux (15-150 keV) in 96 sec: 0.108382 ( -0.028507 0.0285428 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.71286e-07 ( -1.80138e-07 1.9451e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 96.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.25241 ( 1.08182 2.95185 )
Epeak [keV] : 27.7529 ( -20.7108 9.88123 )
Norm@50keV : 0.924461 ( -0.961029 3.74904e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8450 for 56 degrees of freedom
# Null hypothesis probability = 7.890220e-01
Photon flux (15-150 keV) in 96 sec: 0.102657 ( -0.0291366 0.028251 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2392e-07 ( -1.4757e-07 1.92339e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 96.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.25675 -5 )
beta : -3.33723 ( 3.33653 0.989748 )
Epeak [keV] : 25.2757 ( -5.13607 4.97326 )
Norm@50keV : 147.126 ( -36.1421 511.811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.27 using 59 PHA bins.
# Reduced chi-squared = 0.8231 for 55 degrees of freedom
# Null hypothesis probability = 8.223035e-01
Photon flux (15-150 keV) in 96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.07441e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.16215 (-1.57817 2.12165)
R^2/D10^2 : 0.200912 (-0.131789 0.359867)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8327 for 57 degrees of freedom
# Null hypothesis probability = 8.119851e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.627e-07 8.248e-08
25- 50 2.328e-07 1.266e-07
50-150 4.188e-08 3.249e-08
15-150 4.373e-07 2.255e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.1076 (-15.1756 36.5479)
Norm : 0.790340 (-0.307792 0.540883)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.16 using 59 PHA bins.
# Reduced chi-squared = 0.8625 for 57 degrees of freedom
# Null hypothesis probability = 7.603411e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.660e-07 6.852e-08
25- 50 2.057e-07 1.059e-07
50-150 1.371e-07 1.058e-07
15-150 5.088e-07 2.617e-07
Double BB
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.90 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.86 using 59 PHA bins.
# Reduced chi-squared = 0.8553 for 55 degrees of freedom
# Reduced chi-squared = 0.8541 for 55 degrees of freedom
# Reduced chi-squared = 0.8531 for 55 degrees of freedom
# Reduced chi-squared = 0.8528 for 55 degrees of freedom
# Reduced chi-squared = 0.8520 for 55 degrees of freedom
# Null hypothesis probability = 7.686976e-01
# Null hypothesis probability = 7.708313e-01
# Null hypothesis probability = 7.725645e-01
# Null hypothesis probability = 7.731498e-01
# Null hypothesis probability = 7.745061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.666e-07 1.669e-07
25- 50 2.248e-07 2.757e-07
50-150 8.565e-08 1.280e-07
15-150 4.771e-07 5.184e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 96.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.28848 ( -0.455909 0.535144 )
Norm@50keV : 6.24172E-04 ( -0.000239611 0.000239913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.30 using 59 PHA bins.
# Reduced chi-squared = 0.9001 for 57 degrees of freedom
# Null hypothesis probability = 6.876893e-01
Photon flux (15-150 keV) in 96 sec: 0.108382 ( -0.028507 0.0285428 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.71286e-07 ( -1.80138e-07 1.9451e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 96.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.25241 ( 1.08182 2.95185 )
Epeak [keV] : 27.7529 ( -20.7108 9.90261 )
Norm@50keV : 0.924461 ( -0.961029 3.74904e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.32 using 59 PHA bins.
# Reduced chi-squared = 0.8450 for 56 degrees of freedom
# Null hypothesis probability = 7.890220e-01
Photon flux (15-150 keV) in 96 sec: 0.102657 ( -0.0291366 0.028251 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2392e-07 ( -1.4757e-07 1.92339e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 96.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.25675 -5 )
beta : -3.33723 ( 3.33653 0.989748 )
Epeak [keV] : 25.2757 ( -5.13607 4.97326 )
Norm@50keV : 147.126 ( -36.1421 511.811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.27 using 59 PHA bins.
# Reduced chi-squared = 0.8231 for 55 degrees of freedom
# Null hypothesis probability = 8.223035e-01
Photon flux (15-150 keV) in 96 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.07441e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.16215 (-1.57817 2.12165)
R^2/D10^2 : 0.200912 (-0.131789 0.359867)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.46 using 59 PHA bins.
# Reduced chi-squared = 0.8327 for 57 degrees of freedom
# Null hypothesis probability = 8.119851e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.627e-07 9.515e-08
25- 50 2.328e-07 1.413e-07
50-150 4.188e-08 3.391e-08
15-150 4.373e-07 2.542e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 35.1076 (-15.1756 36.5479)
Norm : 0.790340 (-0.307792 0.540883)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.16 using 59 PHA bins.
# Reduced chi-squared = 0.8625 for 57 degrees of freedom
# Null hypothesis probability = 7.603411e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.660e-07 6.984e-08
25- 50 2.057e-07 9.871e-08
50-150 1.371e-07 1.006e-07
15-150 5.088e-07 2.638e-07
Double BB
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.90 using 59 PHA bins.
#Fit statistic : Chi-Squared = 46.86 using 59 PHA bins.
# Reduced chi-squared = 0.8553 for 55 degrees of freedom
# Reduced chi-squared = 0.8541 for 55 degrees of freedom
# Reduced chi-squared = 0.8531 for 55 degrees of freedom
# Reduced chi-squared = 0.8528 for 55 degrees of freedom
# Reduced chi-squared = 0.8520 for 55 degrees of freedom
# Null hypothesis probability = 7.686976e-01
# Null hypothesis probability = 7.708313e-01
# Null hypothesis probability = 7.725645e-01
# Null hypothesis probability = 7.731498e-01
# Null hypothesis probability = 7.745061e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.666e-07 1.519e-07
25- 50 2.248e-07 2.564e-07
50-150 8.565e-08 1.214e-07
15-150 4.771e-07 5.314e-07
Plot creation:
Tue Jun 25 17:15:59 EDT 2019