batgrbproduct Analysis for Trigger=725983
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 Dec 10 01:30:20 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger725983/GCN5_download_cron
======================================================================
Trigger: 00725983 Segment: 000
BAT Trigger Time: 502942784 [s; MET]
Trigger Stop: 502943128 [s; MET]
UTC: 2016-12-09T02:19:26.720920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.740009430608 Dec: -40.4094613142785 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.61
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.61
Flight Position: [ source = BAT ]
RA: 135.740009430608 Dec: -40.4094613142785 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.644709058735 Dec: -40.4686271149407 [deg; J2000]
{ 09h 02m 34.7s , -40d 28' 07.1" }
+/- 1.89912563194743 [arcmin] (estimated 90% radius based on SNR)
+/- 0.929198518882787 [arcmin] (formal 1-sigma fit error)
SNR: 12.1670286155891
Angular difference between Flight and Ground position is 5.616203 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
T50: 344 +/-
Measured from: 0
to: 344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 344 second)
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.285433 0.980049 0.170173 0.172205
0.106461 0.108258 0.091909 0.078973 [error]
Peak 1.285433 0.980049 0.170173 0.172205
0.106461 0.108258 0.091909 0.078973 [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 3.63e-07 3.62e-07 2.53e-07 2.81e-07 1.09e-06 1.26e-06 erg/cm2
Error 5.02e-08 5.06e-08 7.04e-08 1.43e-07 1.67e-07 2.51e-07 erg/cm2
Peak flux Power-law 3.47e-02 1.93e-02 6.76e-03 3.09e-03 6.25e-02 6.39e-02 ph/cm2/s
Error 4.91e-03 2.60e-03 1.82e-03 1.48e-03 7.35e-03 7.64e-03 ph/cm2/s
Fluence Cutoff-PL 3.54e-07 4.22e-07 1.33e-07 6.64e-09 9.16e-07 9.16e-07 erg/cm2
Error 5.44e-08 6.85e-08 9.36e-08 3.98e-08 1.52e-07 1.58e-07 erg/cm2
Peak flux Cutoff-PL 3.33e-02 2.28e-02 3.89e-03 1.06e-04 6.00e-02 6.00e-02 ph/cm2/s
Error 5.35e-03 3.61e-03 2.48e-03 5.47e-04 7.23e-03 7.24e-03 ph/cm2/s
Fluence Band 3.52e-07 4.14e-07 1.58e-07 6.67e-08 9.64e-07 9.94e-07 erg/cm2
Error 5.48e-08 7.75e-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 2.515 0.257 - - 3.15e-04 6.49e-05 54.890 57
CPL 0.363 1.803 24.0 0.0 9.04e-03 0.00e+00 48.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.515 0.257 - - 3.15e-04 6.49e-05 54.890 57
CPL 0.363 1.803 24.0 0.0 9.04e-03 0.00e+00 48.840 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 344.000 0.000 344.000
T90 344.000 0.000 344.000
T50 344.000 0.000 344.000
Peak 344.000 0.000 344.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.6447 -40.4686 0.0158 6.2 -177.0 2.8973 12.2 TRIG_00725983
------------------------------------------
Foreground time interval of the image:
0.000 344.000 (delta_t = 344.000 [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 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51516 ( -0.244519 0.269422 )
Norm@50keV : 3.15181E-04 ( -6.45879e-05 6.51388e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.89 using 59 PHA bins.
# Reduced chi-squared = 0.9630 for 57 degrees of freedom
# Null hypothesis probability = 5.546127e-01
Photon flux (15-150 keV) in 344 sec: 6.24951E-02 ( -0.0073494 0.00735395 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08865e-06 ( -1.63311e-07 1.71335e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.362755 ( -2.04957 1.55569 )
Epeak [keV] : 23.9570 ( )
Norm@50keV : 9.04387E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.84 using 59 PHA bins.
# Reduced chi-squared = 0.8722 for 56 degrees of freedom
# Null hypothesis probability = 7.400518e-01
Photon flux (15-150 keV) in 344 sec: 6.00274E-02 ( -0.0071931 0.0072651 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.15855e-07 ( -1.36702e-07 1.67858e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.241544 ( -1.02347 0.57339 )
beta : -3.81177 ( 4.09078 1.46658 )
Epeak [keV] : 23.8301 ( -10.2216 4.98919 )
Norm@50keV : 1.12673E-02 ( -0.0122448 71.558 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.68 using 59 PHA bins.
# Reduced chi-squared = 0.8851 for 55 degrees of freedom
# Null hypothesis probability = 7.132486e-01
Photon flux (15-150 keV) in 344 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.64229e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.80398 (-0.783389 0.873613)
R^2/D10^2 : 0.136381 (-0.0542043 0.0920651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9060 for 57 degrees of freedom
# Null hypothesis probability = 6.756759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.385e-07 6.675e-08
25- 50 4.384e-07 8.509e-08
50-150 6.548e-08 2.871e-08
15-150 8.424e-07 1.428e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.3595 (-6.64918 9.51176)
Norm : 0.532079 (-0.120153 0.164049)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.81 using 59 PHA bins.
# Reduced chi-squared = 0.8738 for 57 degrees of freedom
# Null hypothesis probability = 7.392669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.615e-07 5.308e-08
25- 50 4.002e-07 6.811e-08
50-150 2.033e-07 9.131e-08
15-150 9.650e-07 1.655e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.81248 (-4.81156 -4.81248)
R1^2/D10^2 : 0.353622 (-0.314678 -0.353622)
kT2 [keV] : 10.1327 (-9.92483 -10.1327)
R2^2/D10^2 : 1.44706E-02 (-0.0144313 0.124242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.65 using 59 PHA bins.
# Reduced chi-squared = 0.8846 for 55 degrees of freedom
# Null hypothesis probability = 7.143092e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-07 2.030e-07
25- 50 4.151e-07 2.190e-07
50-150 1.486e-07 8.777e-08
15-150 9.215e-07 4.715e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51516 ( -0.244519 0.269422 )
Norm@50keV : 3.15181E-04 ( -6.45879e-05 6.51388e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.89 using 59 PHA bins.
# Reduced chi-squared = 0.9630 for 57 degrees of freedom
# Null hypothesis probability = 5.546127e-01
Photon flux (15-150 keV) in 344 sec: 6.24951E-02 ( -0.0073494 0.00735395 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08865e-06 ( -1.63311e-07 1.71335e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.362755 ( -2.04957 1.55569 )
Epeak [keV] : 23.9570 ( )
Norm@50keV : 9.04387E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.84 using 59 PHA bins.
# Reduced chi-squared = 0.8722 for 56 degrees of freedom
# Null hypothesis probability = 7.400518e-01
Photon flux (15-150 keV) in 344 sec: 6.00274E-02 ( -0.0071931 0.0072651 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.15855e-07 ( -1.36702e-07 1.67858e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 344.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.241544 ( -1.02347 0.57339 )
beta : -3.81177 ( 4.09078 1.46658 )
Epeak [keV] : 23.8301 ( -10.2216 4.98919 )
Norm@50keV : 1.12673E-02 ( -0.0122448 71.5614 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.68 using 59 PHA bins.
# Reduced chi-squared = 0.8851 for 55 degrees of freedom
# Null hypothesis probability = 7.132486e-01
Photon flux (15-150 keV) in 344 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.64229e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.80398 (-0.783389 0.873613)
R^2/D10^2 : 0.136381 (-0.0542043 0.0920651)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.64 using 59 PHA bins.
# Reduced chi-squared = 0.9060 for 57 degrees of freedom
# Null hypothesis probability = 6.756759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.385e-07 6.156e-08
25- 50 4.384e-07 8.495e-08
50-150 6.548e-08 2.844e-08
15-150 8.424e-07 1.422e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 28.3595 (-6.64918 9.51176)
Norm : 0.532079 (-0.120153 0.164049)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.81 using 59 PHA bins.
# Reduced chi-squared = 0.8738 for 57 degrees of freedom
# Null hypothesis probability = 7.392669e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.615e-07 5.550e-08
25- 50 4.002e-07 6.792e-08
50-150 2.033e-07 8.937e-08
15-150 9.650e-07 1.705e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.81248 (-4.81171 -4.81248)
R1^2/D10^2 : 0.353622 (-0.314678 -0.353622)
kT2 [keV] : 10.1327 (-9.85757 -10.1327)
R2^2/D10^2 : 1.44706E-02 (-0.0144313 0.124242)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.65 using 59 PHA bins.
# Reduced chi-squared = 0.8846 for 55 degrees of freedom
# Null hypothesis probability = 7.143092e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.578e-07 2.083e-07
25- 50 4.151e-07 2.188e-07
50-150 1.486e-07 8.421e-08
15-150 9.215e-07 4.790e-07
Plot creation:
Sat Dec 10 01:38:04 EST 2016