batgrbproduct Analysis for Trigger=582184
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): Fri Dec 27 22:45:02 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger582184/GCN5_download_cron
======================================================================
Trigger: 00582184 Segment: 000
BAT Trigger Time: 409812302.656 [s; MET]
Trigger Stop: 409812303.168 [s; MET]
UTC: 2013-12-27T04:44:51.212140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 67.3857857931921 Dec: 28.8645303957545 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.87
Image Trigger?: NO
Rate S/N Ratio: 13.5646599662505 [ if not an image trigger ]
Image S/N Ratio: 7.87
Flight Position: [ source = BAT ]
RA: 67.3857857931921 Dec: 28.8645303957545 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 67.368697355537 Dec: 28.8789911261734 [deg; J2000]
{ 04h 29m 28.5s , +28d 52' 44.4" }
+/- 1.29613581128519 [arcmin] (estimated 90% radius based on SNR)
+/- 0.43229961029682 [arcmin] (formal 1-sigma fit error)
SNR: 20.9985390366466
Angular difference between Flight and Ground position is 1.248585 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 17.9799999594688 +/- 1.558157845848
Measured from: -0.339999914169312
to: 17.6400000452995 [s; relative to TRIGTIME]
T50: 10.4159999489784 +/- 1.68434196592419
Measured from: 2.00000011920929
to: 12.4160000681877 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.60799998044968
to: 2.60799998044968 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.18800002336502
to: 19.227999985218 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.371685 0.475053 0.405222 0.091788
0.028105 0.029712 0.026496 0.022319 [error]
Peak 0.046229 0.049616 0.044014 0.006649
0.006513 0.006989 0.006195 0.005377 [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 9.61e-08 1.93e-07 3.01e-07 1.04e-06 8.40e-07 1.63e-06 erg/cm2
Error 1.18e-08 1.39e-08 2.59e-08 2.00e-07 6.34e-08 2.17e-07 erg/cm2
Peak flux Power-law 3.88e-01 3.83e-01 2.64e-01 2.88e-01 1.15e+00 1.32e+00 ph/cm2/s
Error 8.65e-02 5.38e-02 5.10e-02 1.12e-01 1.58e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 9.64e-08 1.93e-07 3.01e-07 1.03e-06 8.40e-07 1.62e-06 erg/cm2
Error 1.17e-08 1.45e-08 2.66e-08 2.95e-07 6.48e-08 3.66e-07 erg/cm2
Peak flux Cutoff-PL 3.71e-01 3.94e-01 2.71e-01 2.06e-01 1.14e+00 1.24e+00 ph/cm2/s
Error 1.01e-01 6.37e-02 5.57e-02 1.25e-01 1.62e-01 2.45e-01 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 1.24e+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 1.356 0.122 - - 4.22e-03 2.81e-04 60.170 57
CPL 1.352 0.269 9997.2 0.0 4.24e-03 1.34e-03 60.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.534 0.246 - - 9.13e-03 1.36e-03 31.880 57
CPL 1.255 0.752 131.9 0.0 1.27e-02 1.97e-02 31.570 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: 19.712000 sec.
T50 in the 50-300 keV band: 12.352000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.416 -1.188 19.228
T90 17.980 -0.340 17.640
T50 10.416 2.000 12.416
Peak 1.000 1.608 2.608
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
67.3687 +28.8790 0.0091 14.1 -70.6 0.8825 21.0 TRIG_00582184
------------------------------------------
Foreground time interval of the image:
-1.188 9.445 (delta_t = 10.633 [sec])
Background time interval of the image:
-239.656 -26.578 (delta_t = 213.078 [sec])
-25.656 -1.188 (delta_t = 24.468 [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 -1.188 sec. to 19.228 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35622 ( -0.121924 0.122028 )
Norm@50keV : 4.21859E-03 ( -0.000281579 0.00028076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.617725e-01
Photon flux (15-150 keV) in 20.42 sec: 0.508874 ( -0.0344087 0.0344688 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.40181e-07 ( -6.31858e-08 6.36299e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.188 sec. to 19.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35245 ( -0.415092 0.122833 )
Epeak [keV] : 9997.22 ( -9998.82 -9998.82 )
Norm@50keV : 4.23567E-03 ( -0.0002825 0.00239484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 56 degrees of freedom
# Null hypothesis probability = 3.272087e-01
Photon flux (15-150 keV) in 20.42 sec: 0.508817 ( -0.034171 0.033985 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.39611e-07 ( -6.59321e-08 6.37349e-08 ) ergs/cm2
Band function
Time interval is from -1.188 sec. to 19.228 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11283 ( 1.11303 1.11303 )
beta : -1.35545 ( -0.122087 0.121988 )
Epeak [keV] : 33.2830 ( -33.3431 -33.3431 )
Norm@50keV : 8.14569E-03 ( -0.00419324 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.17 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.940429e-01
Photon flux (15-150 keV) in 20.42 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] : 17.2742 ( )
R^2/D10^2 : 3.57219E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 122.05 using 59 PHA bins.
# Reduced chi-squared = 2.1413 for 57 degrees of freedom
# Null hypothesis probability = 1.230543e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.413e-08 6.636e-09
25- 50 1.977e-07 1.812e-08
50-150 4.234e-07 5.350e-08
15-150 6.653e-07 6.003e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.09500 (-0.139007 0.138997)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.315688e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.065e-07 8.760e-09
25- 50 2.050e-07 2.135e-08
50-150 4.495e-07 1.354e-07
15-150 7.610e-07 1.379e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.60654 (-1.31058 1.5311)
R1^2/D10^2 : 0.607611 (-0.310027 0.768043)
kT2 [keV] : 29.0792 (-4.98407 8.31911)
R2^2/D10^2 : 5.36595E-03 (-0.0029629 0.00478899)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.23 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 55 degrees of freedom
# Null hypothesis probability = 3.240133e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.637e-08 3.046e-08
25- 50 1.896e-07 4.332e-08
50-150 5.568e-07 1.584e-07
15-150 8.428e-07 1.965e-07
Peak spectrum fit
Power-law model
Time interval is from 1.608 sec. to 2.608 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53402 ( -0.241461 0.250604 )
Norm@50keV : 9.13064E-03 ( -0.0013682 0.00134187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.88 using 59 PHA bins.
# Reduced chi-squared = 0.5593 for 57 degrees of freedom
# Null hypothesis probability = 9.971426e-01
Photon flux (15-150 keV) in 1 sec: 1.15061 ( -0.157771 0.157826 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.61577e-08 ( -1.41137e-08 1.43922e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.608 sec. to 2.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25489 ( -0.991154 0.513633 )
Epeak [keV] : 131.859 ( -131.86 -131.86 )
Norm@50keV : 1.27142E-02 ( -0.0127142 0.026687 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.57 using 59 PHA bins.
# Reduced chi-squared = 0.5638 for 56 degrees of freedom
# Null hypothesis probability = 9.965615e-01
Photon flux (15-150 keV) in 1 sec: 1.13833 ( -0.162237 0.16143 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.44587e-08 ( -1.49842e-08 1.52993e-08 ) ergs/cm2
Band function
Time interval is from 1.608 sec. to 2.608 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.20513 ( -0.439368 0.943271 )
beta : -9.37166 ( 9.37167 19.3717 )
Epeak [keV] : 121.894 ( -61.9109 -122.28 )
Norm@50keV : 1.34226E-02 ( -0.00547976 0.0152487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.58 using 59 PHA bins.
# Reduced chi-squared = 0.5742 for 55 degrees of freedom
# Null hypothesis probability = 9.952986e-01
Photon flux (15-150 keV) in 1 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] : 15.3498 (-2.68258 3.19483)
R^2/D10^2 : 0.120594 (-0.0573501 0.113077)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.43 using 59 PHA bins.
# Reduced chi-squared = 0.7971 for 57 degrees of freedom
# Null hypothesis probability = 8.650397e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.925e-09 1.606e-09
25- 50 2.404e-08 4.970e-09
50-150 3.894e-08 1.141e-08
15-150 6.890e-08 1.438e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-94.1991 -199.363)
Norm : 4.69535 (-0.641073 0.641244)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.65 using 59 PHA bins.
# Reduced chi-squared = 0.5553 for 57 degrees of freedom
# Null hypothesis probability = 9.974076e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-08 6.640e-09
25- 50 2.249e-08 1.241e-08
50-150 4.933e-08 2.740e-08
15-150 8.351e-08 4.601e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.47732 (-1.55961 2.32053)
R1^2/D10^2 : 6.29567 (-5.12016 44.2281)
kT2 [keV] : 21.2903 (-4.45631 7.22594)
R2^2/D10^2 : 3.40846E-02 (-0.0219794 0.0494805)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.77 using 59 PHA bins.
# Reduced chi-squared = 0.5231 for 55 degrees of freedom
# Null hypothesis probability = 9.986538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.254e-08 6.749e-09
25- 50 1.979e-08 7.553e-09
50-150 5.098e-08 2.812e-08
15-150 8.330e-08 3.305e-08
Plot creation:
Fri Dec 27 23:09:09 EST 2013