batgrbproduct Analysis for Trigger=583338
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 Jan 10 10:08:43 EST 2014
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger583338/batgroup_hand_proc
======================================================================
Trigger: 00583338 Segment: 000
BAT Trigger Time: 410894334.016 [s; MET]
Trigger Stop: 410894334.528 [s; MET]
UTC: 2014-01-08T17:18:42.521660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 325.177722335241 Dec: 58.7661610684908 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.2
Image Trigger?: NO
Rate S/N Ratio: 16.0312195418814 [ if not an image trigger ]
Image S/N Ratio: 9.2
Flight Position: [ source = BAT ]
RA: 325.177722335241 Dec: 58.7661610684908 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 325.12615565405 Dec: 58.7483580195235 [deg; J2000]
{ 21h 40m 30.3s , +58d 44' 54.1" }
+/- 0.689966927917788 [arcmin] (estimated 90% radius based on SNR)
+/- 0.212485665517042 [arcmin] (formal 1-sigma fit error)
SNR: 51.6849026337537
Angular difference between Flight and Ground position is 1.927754 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 93.9799999594688 +/- 3.25220719968259
Measured from: -1.34799998998642
to: 92.6319999694824 [s; relative to TRIGTIME]
T50: 79.7359999418259 +/- 0.280028589158328
Measured from: 6.43600004911423
to: 86.1719999909401 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.48800003528595
to: 7.48800003528595 [s; relative to TRIGTIME]
Total Fluence
Measured from: -24.9079999923706
to: 103.260000050068 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.484017 4.322648 3.050717 0.683880
0.076755 0.076857 0.067181 0.055832 [error]
Peak 0.196762 0.265986 0.223497 0.047004
0.010662 0.011563 0.010794 0.007361 [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 1.08e-06 1.84e-06 2.40e-06 6.33e-06 7.04e-06 1.16e-05 erg/cm2
Error 5.28e-08 5.10e-08 7.29e-08 4.46e-07 1.75e-07 4.82e-07 erg/cm2
Peak flux Power-law 1.98e+00 2.00e+00 1.43e+00 1.62e+00 6.05e+00 7.03e+00 ph/cm2/s
Error 1.72e-01 1.06e-01 8.84e-02 2.08e-01 3.02e-01 3.46e-01 ph/cm2/s
Fluence Cutoff-PL 1.04e-06 1.86e-06 2.43e-06 5.19e-06 6.97e-06 1.05e-05 erg/cm2
Error 6.58e-08 5.46e-08 8.04e-08 1.23e-06 2.02e-07 1.28e-06 erg/cm2
Peak flux Cutoff-PL 1.85e+00 2.06e+00 1.47e+00 1.14e+00 5.95e+00 6.52e+00 ph/cm2/s
Error 2.13e-01 1.21e-01 1.01e-01 4.89e-01 3.17e-01 5.36e-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 6.60e+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 1.618 0.047 - - 5.89e-03 1.41e-04 35.800 57
CPL 1.471 0.182 195.5 -57.1 6.88e-03 1.31e-03 34.060 56
The chi2 of BB fit is Chi-Squared Chi-Squared 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 1.489 0.086 - - 4.86e-02 2.41e-03 53.640 57
CPL 1.159 0.345 132.5 1697.2 7.05e-02 2.77e-02 50.800 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: 93.440000 sec.
T50 in the 50-300 keV band: 79.488000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 128.168 -24.908 103.260
T90 93.980 -1.348 92.632
T50 79.736 6.436 86.172
Peak 1.000 6.488 7.488
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
325.1262 58.7484 0.0037 25.2360 147.7409 4.9225809 51.685 TRIG_00583338
Foreground time interval of the image:
-24.908 11.485 (delta_t = 36.393 [sec])
Background time interval of the image:
-239.016 -24.908 (delta_t = 214.108 [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 -24.908 sec. to 103.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61803 ( -0.0472305 0.0473237 )
Norm@50keV : 5.88715E-03 ( -0.00014108 0.000141053 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.80 using 59 PHA bins.
# Reduced chi-squared = 0.6280 for 57 degrees of freedom
# Null hypothesis probability = 9.874609e-01
Photon flux (15-150 keV) in 128.2 sec: 0.760813 ( -0.0207816 0.020867 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04338e-06 ( -1.7539e-07 1.75597e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.908 sec. to 103.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47082 ( -0.197062 0.167934 )
Epeak [keV] : 195.531 ( -81.4192 -195.531 )
Norm@50keV : 6.87810E-03 ( -0.00106089 0.00155047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.06 using 59 PHA bins.
# Reduced chi-squared = 0.6081 for 56 degrees of freedom
# Null hypothesis probability = 9.909901e-01
Photon flux (15-150 keV) in 128.2 sec: 0.751056 ( -0.023905 0.024055 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.96886e-06 ( -2.02107e-07 2.01107e-07 ) ergs/cm2
Band function
Time interval is from -24.908 sec. to 103.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27035 ( 1.2099 0.682867 )
beta : -1.69645 ( 1.69634 0.0915236 )
Epeak [keV] : 93.8053 ( -54.84 -85.3771 )
Norm@50keV : 8.93479E-03 ( -0.00285853 0.00477011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 33.05 using 59 PHA bins.
# Reduced chi-squared = 0.6010 for 55 degrees of freedom
# Null hypothesis probability = 9.917001e-01
Photon flux (15-150 keV) in 128.2 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] : 15.6252 ( )
R^2/D10^2 : 6.90593E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 380.46 using 59 PHA bins.
# Reduced chi-squared = 6.6747 for 57 degrees of freedom
# Null hypothesis probability = 2.361985e-49
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.492e-07 2.256e-08
25- 50 1.852e-06 5.961e-08
50-150 3.131e-06 1.346e-07
15-150 5.431e-06 1.474e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 189.806 (-24.0406 -188.285)
Norm : 3.03994 (-0.0841678 0.090893)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 36.85 using 59 PHA bins.
# Reduced chi-squared = 0.6464 for 57 degrees of freedom
# Null hypothesis probability = 9.824381e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.766e-07 4.750e-08
25- 50 1.868e-06 1.154e-07
50-150 4.029e-06 9.134e-07
15-150 6.873e-06 9.666e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.87499 (-0.755671 0.785762)
R1^2/D10^2 : 0.532366 (-0.141395 0.218328)
kT2 [keV] : 28.7129 (-2.99792 4.05697)
R2^2/D10^2 : 6.15287E-03 (-0.00229277 0.00309509)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.43 using 59 PHA bins.
# Reduced chi-squared = 0.9168 for 55 degrees of freedom
# Null hypothesis probability = 6.498163e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.608e-07 7.589e-08
25- 50 1.920e-06 9.743e-08
50-150 4.064e-06 3.372e-07
15-150 6.845e-06 4.269e-07
Peak spectrum fit
Power-law model
Time interval is from 6.488 sec. to 7.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48922 ( -0.0858266 0.086513 )
Norm@50keV : 4.85863E-02 ( -0.00241258 0.00240413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.64 using 59 PHA bins.
# Reduced chi-squared = 0.9411 for 57 degrees of freedom
# Null hypothesis probability = 6.017429e-01
Photon flux (15-150 keV) in 1 sec: 6.04807 ( -0.302196 0.302547 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61736e-07 ( -2.50722e-08 2.51771e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.488 sec. to 7.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15860 ( -0.361052 0.32878 )
Epeak [keV] : 132.534 ( -43.9647 3350.39 )
Norm@50keV : 7.04764E-02 ( -0.0212948 0.0341707 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.80 using 59 PHA bins.
# Reduced chi-squared = 0.9071 for 56 degrees of freedom
# Null hypothesis probability = 6.715423e-01
Photon flux (15-150 keV) in 1 sec: 5.95042 ( -0.31706 0.31725 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.52304e-07 ( -2.7185e-08 2.7094e-08 ) ergs/cm2
Band function
Time interval is from 6.488 sec. to 7.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.15314 ( -0.216323 1.05014 )
beta : -2.00512 ( 2.01955 0.553745 )
Epeak [keV] : 130.673 ( -102.371 370.759 )
Norm@50keV : 7.09631E-02 ( -0.0214509 0.339724 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.80 using 59 PHA bins.
# Reduced chi-squared = 0.9236 for 55 degrees of freedom
# Null hypothesis probability = 6.358928e-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] : 15.8277 ( )
R^2/D10^2 : 0.570830 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 137.31 using 59 PHA bins.
# Reduced chi-squared = 2.4090 for 57 degrees of freedom
# Null hypothesis probability = 1.409065e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.964e-08 2.780e-09
25- 50 1.236e-07 7.800e-09
50-150 2.154e-07 2.105e-08
15-150 3.686e-07 2.225e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 24.8045 (-1.20114 1.20113)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.12 using 59 PHA bins.
# Reduced chi-squared = 0.9319 for 57 degrees of freedom
# Null hypothesis probability = 6.213983e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.177e-08 3.655e-09
25- 50 1.188e-07 6.300e-09
50-150 2.606e-07 1.470e-08
15-150 4.412e-07 2.665e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.24546 (-1.10485 1.35182)
R1^2/D10^2 : 8.48033 (-4.13177 9.12151)
kT2 [keV] : 23.8495 (-2.90907 4.33572)
R2^2/D10^2 : 0.113148 (-0.052463 0.0717597)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.98 using 59 PHA bins.
# Reduced chi-squared = 0.9451 for 55 degrees of freedom
# Null hypothesis probability = 5.907871e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.791e-08 1.218e-08
25- 50 1.139e-07 1.537e-08
50-150 2.743e-07 4.310e-08
15-150 4.461e-07 5.850e-08
Plot creation:
Fri Jan 10 10:57:20 EST 2014