batgrbproduct Analysis for Trigger=573667
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Tue Oct 8 09:52:08 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger573667/GCN5_download_cron
======================================================================
Trigger: 00573667 Segment: 000
BAT Trigger Time: 402886672 [s; MET]
Trigger Stop: 402886736 [s; MET]
UTC: 2013-10-08T00:57:40.876060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.333557422165 Dec: 30.2198818589025 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.06
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.06
Flight Position: [ source = BAT ]
RA: 297.333557422165 Dec: 30.2198818589025 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.372358901016 Dec: 30.2773256105108 [deg; J2000]
{ 19h 49m 29.4s , +30d 16' 38.4" }
+/- 3.72043455561074 [arcmin] (estimated 90% radius based on SNR)
+/- 2.63721926448721 [arcmin] (formal 1-sigma fit error)
SNR: 4.6556954825795
Angular difference between Flight and Ground position is 3.990464 arcmin
Partial Coding Fraction: 1 [ 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 0.141993 0.211830 -0.004983 -0.028601
0.040916 0.040701 0.034468 0.029859 [error]
Peak 0.141993 0.211830 -0.004983 -0.028601
0.040916 0.040701 0.034468 0.029859 [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 3.78e-08 5.31e-08 5.51e-08 1.05e-07 1.79e-07 2.52e-07 erg/cm2
Error 1.48e-08 1.71e-08 2.75e-08 1.19e-07 6.80e-08 1.37e-07 erg/cm2
Peak flux Power-law 1.93e-02 1.49e-02 7.74e-03 5.80e-03 4.45e-02 4.76e-02 ph/cm2/s
Error 7.62e-03 4.74e-03 3.75e-03 6.19e-03 1.41e-02 1.53e-02 ph/cm2/s
Fluence Cutoff-PL 2.50e-08 9.70e-08 1.78e-08 1.40e-11 1.40e-07 1.40e-07 erg/cm2
Error 1.67e-08 2.83e-08 2.39e-08 9.81e-10 4.25e-08 4.25e-08 erg/cm2
Peak flux Cutoff-PL 1.18e-02 2.72e-02 3.02e-03 1.29e-06 4.20e-02 4.20e-02 ph/cm2/s
Error 8.34e-03 7.84e-03 3.76e-03 8.50e-05 1.28e-02 1.28e-02 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.938 0.505 - - 3.05e-04 1.18e-04 70.510 57
CPL -6.803 0.000 35.7 5.5 8.40e+01 0.00e+00 58.960 56
The chi2 of BB fit is 61.49 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.938 0.505 - - 3.05e-04 1.18e-04 70.510 57
CPL -6.803 0.000 35.7 5.5 8.40e+01 0.00e+00 58.960 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
297.3724 +30.2773 0.0412 12.2 -42.4 0.3722 4.7 TRIG_00573667
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93834 ( -0.477776 0.53205 )
Norm@50keV : 3.05386E-04 ( -0.000118509 0.000117325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.077716e-01
Photon flux (15-150 keV) in 64 sec: 4.45478E-02 ( -0.0140694 0.0140802 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79253e-07 ( -6.53293e-08 7.05779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.80331 ( )
Epeak [keV] : 35.6732 ( -4.75414 6.21389 )
Norm@50keV : 84.0114 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.96 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 56 degrees of freedom
# Null hypothesis probability = 3.676462e-01
Photon flux (15-150 keV) in 64 sec: 4.20121E-02 ( -0.0125152 0.0130924 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39808e-07 ( -4.05664e-08 4.44557e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.72359 -5 )
beta : -9.37030 ( 9.37167 19.3238 )
Epeak [keV] : 36.2344 ( -5.53135 5.7407 )
Norm@50keV : 6.31738 ( -1.68097 12.7258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.14 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 55 degrees of freedom
# Null hypothesis probability = 3.269621e-01
Photon flux (15-150 keV) in 64 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] : 9.38815 (-1.82807 2.3579)
R^2/D10^2 : 3.20106E-02 (-0.0190346 0.0414543)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.49 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.185886e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.588e-08 2.213e-08
25- 50 8.135e-08 4.938e-08
50-150 3.526e-08 2.396e-08
15-150 1.525e-07 9.146e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.9267 (-25.3399 98.1769)
Norm : 0.254789 (-0.0767799 0.0932454)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.84 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.541684e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.052e-08 2.629e-08
25- 50 5.973e-08 4.589e-08
50-150 6.217e-08 8.755e-08
15-150 1.624e-07 1.581e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.20296 (-9.25625 -9.25625)
R1^2/D10^2 : 2.32511E-03 (-0.00232652 -0.00232652)
kT2 [keV] : 9.42643 (-9.39396 74.1994)
R2^2/D10^2 : 2.94118E-02 (-0.0294535 -0.0294535)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.49 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.550396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.577e-08 2.388e-02
25- 50 8.141e-08 1.972e-01
50-150 3.555e-08 5.498e+00
15-150 1.527e-07 5.270e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93834 ( -0.477776 0.53205 )
Norm@50keV : 3.05386E-04 ( -0.000118509 0.000117325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.51 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.077716e-01
Photon flux (15-150 keV) in 64 sec: 4.45478E-02 ( -0.0140694 0.0140802 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.79253e-07 ( -6.53293e-08 7.05779e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.80331 ( )
Epeak [keV] : 35.6732 ( -4.75414 6.21389 )
Norm@50keV : 84.0114 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.96 using 59 PHA bins.
# Reduced chi-squared = 1.053 for 56 degrees of freedom
# Null hypothesis probability = 3.676462e-01
Photon flux (15-150 keV) in 64 sec: 4.20121E-02 ( -0.0125152 0.0130924 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.39808e-07 ( -4.05664e-08 4.44557e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.72359 -5 )
beta : -9.37030 ( 9.37167 19.3238 )
Epeak [keV] : 36.2344 ( -5.53135 5.7407 )
Norm@50keV : 6.31738 ( -1.68097 12.7258 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.14 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 55 degrees of freedom
# Null hypothesis probability = 3.269621e-01
Photon flux (15-150 keV) in 64 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] : 9.38815 (-1.82807 2.3579)
R^2/D10^2 : 3.20106E-02 (-0.0190346 0.0414543)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.49 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 57 degrees of freedom
# Null hypothesis probability = 3.185886e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.588e-08 2.181e-08
25- 50 8.135e-08 4.680e-08
50-150 3.526e-08 2.460e-08
15-150 1.525e-07 7.857e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.9267 (-25.3399 98.1769)
Norm : 0.254789 (-0.0767799 0.093245)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.84 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.541684e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.052e-08 2.619e-08
25- 50 5.973e-08 4.362e-08
50-150 6.217e-08 8.467e-08
15-150 1.624e-07 1.524e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.20296 (-9.25625 -9.25625)
R1^2/D10^2 : 2.32511E-03 (-0.00232652 -0.00232652)
kT2 [keV] : 9.42643 (-9.39396 74.1994)
R2^2/D10^2 : 2.94118E-02 (-0.0294535 -0.0294535)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.49 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.550396e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.577e-08 2.444e-02
25- 50 8.141e-08 2.291e-01
50-150 3.555e-08 4.995e+00
15-150 1.527e-07 5.139e+00
Plot creation:
Tue Oct 8 11:38:14 EDT 2013