batgrbproduct analysis for trigger=751253
batgrbproduct Analysis for Trigger=751253
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): Thu May 4 21:10:43 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger751253/GCN5_download_cron
======================================================================
Trigger: 00751253 Segment: 000
BAT Trigger Time: 515536392 [s; MET]
Trigger Stop: 515536456 [s; MET]
UTC: 2017-05-03T20:32:52.995080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.8483631818705 Dec: 21.9569700762437 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.96
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 20.96
Flight Position: [ source = BAT ]
RA: 83.8483631818705 Dec: 21.9569700762437 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.8456218791933 Dec: 21.9728414927745 [deg; J2000]
{ 05h 35m 22.9s , +21d 58' 22.2" }
+/- 1.03706584524598 [arcmin] (estimated 90% radius based on SNR)
+/- 0.373433271378834 [arcmin] (formal 1-sigma fit error)
SNR: 28.876058070054
Angular difference between Flight and Ground position is 0.964425 arcmin
Partial Coding Fraction: 0.875 [ 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 1.050775 1.062318 0.536321 0.027020
0.046695 0.047660 0.040761 0.034897 [error]
Peak 1.050775 1.062318 0.536321 0.027020
0.046695 0.047660 0.040761 0.034897 [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 3.20e-07 4.20e-07 4.05e-07 6.94e-07 1.37e-06 1.84e-06 erg/cm2
Error 2.78e-08 2.32e-08 3.97e-08 1.39e-07 8.84e-08 1.78e-07 erg/cm2
Peak flux Power-law 1.66e-01 1.21e-01 5.83e-02 3.97e-02 3.65e-01 3.85e-01 ph/cm2/s
Error 1.48e-02 6.68e-03 5.50e-03 7.39e-03 2.07e-02 2.13e-02 ph/cm2/s
Fluence Cutoff-PL 3.14e-07 4.28e-07 4.02e-07 5.07e-07 1.35e-06 1.65e-06 erg/cm2
Error 3.13e-08 2.90e-08 4.18e-08 2.39e-07 1.08e-07 3.22e-07 erg/cm2
Peak flux Cutoff-PL 1.63e-01 1.23e-01 5.81e-02 3.10e-02 3.61e-01 3.75e-01 ph/cm2/s
Error 1.70e-02 8.18e-03 5.69e-03 1.49e-02 2.24e-02 2.89e-02 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.56e-01 1.24e-01 5.54e-02 3.37e-02 3.51e-01 3.68e-01 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 2.054 0.115 - - 2.37e-03 1.64e-04 53.430 57
CPL 1.888 0.353 28.9 -2.1 2.94e-03 0.00e+00 52.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.054 0.115 - - 2.37e-03 1.64e-04 53.430 57
CPL 1.888 0.353 28.9 -2.1 2.94e-03 0.00e+00 52.970 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
83.8456 +21.9728 0.0067 15.5 -117.7 2.6995 28.9 TRIG_00751253
------------------------------------------
Foreground time interval of the image:
0.000 54.700 (delta_t = 54.700 [sec])
56.000 64.000 (delta_t = 8.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 54.700000
56.000000 64.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05423 ( -0.11322 0.116217 )
Norm@50keV : 2.36935E-03 ( -0.000165163 0.000162943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.43 using 59 PHA bins.
# Reduced chi-squared = 0.9373 for 57 degrees of freedom
# Null hypothesis probability = 6.099684e-01
Photon flux (15-150 keV) in 62.7 sec: 0.364560 ( -0.0206438 0.0206757 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37479e-06 ( -8.78784e-08 8.88904e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 54.700000
56.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88798 ( -0.458192 0.24856 )
Epeak [keV] : 28.8549 ( -24.7199 -28.8549 )
Norm@50keV : 2.93729E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.97 using 59 PHA bins.
# Reduced chi-squared = 0.9459 for 56 degrees of freedom
# Null hypothesis probability = 5.903453e-01
Photon flux (15-150 keV) in 62.7 sec: 0.360869 ( -0.022474 0.022323 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34893e-06 ( -1.08672e-07 1.07041e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 54.700000
56.000000 64.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19445 ( 1.1743 1.1743 )
beta : -2.14038 ( 2.14093 0.169355 )
Epeak [keV] : 28.2254 ( -28.0979 -28.0979 )
Norm@50keV : 9.02434E-03 ( -0.00594687 700.716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.13 using 59 PHA bins.
# Reduced chi-squared = 0.9478 for 55 degrees of freedom
# Null hypothesis probability = 5.850489e-01
Photon flux (15-150 keV) in 62.7 sec: 0.351169 ( ) 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] : 9.71707 ( )
R^2/D10^2 : 0.177799 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 127.06 using 59 PHA bins.
# Reduced chi-squared = 2.2291 for 57 degrees of freedom
# Null hypothesis probability = 2.955022e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.122e-07 2.085e-08
25- 50 5.062e-07 3.292e-08
50-150 2.430e-07 4.166e-08
15-150 9.613e-07 6.333e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.6897 (-10.9121 14.3494)
Norm : 1.81970 (-0.181989 0.207394)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.00 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.749705e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.893e-07 2.474e-08
25- 50 4.483e-07 2.436e-08
50-150 5.355e-07 7.643e-08
15-150 1.273e-06 8.402e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.88654 (-0.85298 0.888366)
R1^2/D10^2 : 0.958074 (-0.389401 0.795545)
kT2 [keV] : 21.4808 (-4.00773 6.15929)
R2^2/D10^2 : 6.00662E-03 (-0.00365158 0.00761949)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9537 for 55 degrees of freedom
# Null hypothesis probability = 5.725973e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-07 4.668e-08
25- 50 4.267e-07 6.471e-08
50-150 6.054e-07 2.284e-07
15-150 1.334e-06 2.869e-07
Peak spectrum fit
Power-law model
Time interval is from 56.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05423 ( -0.11322 0.116217 )
Norm@50keV : 2.36935E-03 ( -0.000165163 0.000162943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.43 using 59 PHA bins.
# Reduced chi-squared = 0.9373 for 57 degrees of freedom
# Null hypothesis probability = 6.099684e-01
Photon flux (15-150 keV) in 62.7 sec: 0.364560 ( -0.0206438 0.0206757 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.37479e-06 ( -8.78784e-08 8.88904e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 56.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.88798 ( -0.458192 0.24856 )
Epeak [keV] : 28.8549 ( -24.7183 -28.8549 )
Norm@50keV : 2.93729E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.97 using 59 PHA bins.
# Reduced chi-squared = 0.9459 for 56 degrees of freedom
# Null hypothesis probability = 5.903453e-01
Photon flux (15-150 keV) in 62.7 sec: 0.360869 ( -0.022474 0.022323 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34893e-06 ( -1.08672e-07 1.07041e-07 ) ergs/cm2
Band function
Time interval is from 56.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.19445 ( 1.1743 1.1743 )
beta : -2.14038 ( 2.14093 0.169355 )
Epeak [keV] : 28.2254 ( -28.0979 -28.0979 )
Norm@50keV : 9.02434E-03 ( -0.00594687 700.685 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.13 using 59 PHA bins.
# Reduced chi-squared = 0.9478 for 55 degrees of freedom
# Null hypothesis probability = 5.850489e-01
Photon flux (15-150 keV) in 62.7 sec: 0.351169 ( ) 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] : 9.71707 ( )
R^2/D10^2 : 0.177799 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 127.06 using 59 PHA bins.
# Reduced chi-squared = 2.2291 for 57 degrees of freedom
# Null hypothesis probability = 2.955022e-07
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.122e-07 2.270e-08
25- 50 5.062e-07 3.110e-08
50-150 2.430e-07 3.847e-08
15-150 9.613e-07 6.427e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.6897 (-10.9121 14.3494)
Norm : 1.81970 (-0.181989 0.207394)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.00 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 57 degrees of freedom
# Null hypothesis probability = 4.749705e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.893e-07 2.530e-08
25- 50 4.483e-07 2.477e-08
50-150 5.355e-07 7.756e-08
15-150 1.273e-06 8.370e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.88654 (-0.85298 0.888366)
R1^2/D10^2 : 0.958074 (-0.389401 0.795545)
kT2 [keV] : 21.4808 (-4.00773 6.15929)
R2^2/D10^2 : 6.00662E-03 (-0.00365158 0.00761949)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.45 using 59 PHA bins.
# Reduced chi-squared = 0.9537 for 55 degrees of freedom
# Null hypothesis probability = 5.725973e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.015e-07 5.439e-08
25- 50 4.267e-07 6.712e-08
50-150 6.054e-07 1.984e-07
15-150 1.334e-06 3.311e-07
Plot creation:
Thu May 4 21:37:51 EDT 2017