batgrbproduct Analysis for Trigger=599954
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): Mon May 26 17:35:38 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger599954/GCN5_download_cron
======================================================================
Trigger: 00599954 Segment: 000
BAT Trigger Time: 422749560 [s; MET]
Trigger Stop: 422749880 [s; MET]
UTC: 2014-05-25T22:25:47.943380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.617221592489 Dec: -26.3388524447144 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.23
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.23
Flight Position: [ source = BAT ]
RA: 268.617221592489 Dec: -26.3388524447144 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.506190001289 Dec: -26.2009753129381 [deg; J2000]
{ 17h 54m 01.5s , -26d 12' 03.5" }
+/- 8.26364864026944 [arcmin] (estimated 90% radius based on SNR)
+/- 4.87158290058136 [arcmin] (formal 1-sigma fit error)
SNR: 1.48892523160506
Angular difference between Flight and Ground position is 10.204078 arcmin
Partial Coding Fraction: 0.2363281 [ including projection effects ]
Duration
T90: 18.5199999213219 +/- 54.004426656286
Measured from: 5.44800013303757
to: 23.9680000543594 [s; relative to TRIGTIME]
T50: 27.6319999098778 +/- 48.3789560884902
Measured from: 16.5680001378059
to: 44.2000000476837 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.2599999904633
to: 13.2599999904633 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.111999988555908
to: 69.6000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.698540 0.302612 0.066242 0.034401
0.116323 0.108018 0.090001 0.078864 [error]
Peak 0.061823 0.026812 0.001768 0.012197
0.014356 0.012959 0.010851 0.009624 [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 2.61e-07 1.47e-07 5.24e-08 2.45e-08 4.74e-07 4.85e-07 erg/cm2
Error 6.41e-08 6.30e-08 4.82e-08 4.66e-08 1.48e-07 1.67e-07 erg/cm2
Peak flux Power-law 6.31e-01 2.18e-01 4.27e-02 9.84e-03 8.98e-01 9.01e-01 ph/cm2/s
Error 2.54e-01 1.24e-01 5.41e-02 2.48e-02 3.44e-01 3.47e-01 ph/cm2/s
Fluence Cutoff-PL 2.64e-07 1.50e-07 3.25e-08 2.65e-09 4.48e-07 4.48e-07 erg/cm2
Error 6.70e-08 7.52e-08 5.37e-08 4.45e-08 1.55e-07 1.72e-07 erg/cm2
Peak flux Cutoff-PL 6.43e-01 2.32e-01 1.59e-02 1.26e-04 8.91e-01 8.91e-01 ph/cm2/s
Error 3.06e-01 1.95e-01 4.98e-02 2.16e-02 3.36e-01 3.36e-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 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 3.491 0.799 - - 4.36e-04 3.02e-04 58.070 57
CPL 1.818 0.000 2.8 0.0 7.80e-03 0.00e+00 57.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.353 1.124 - - 2.50e-03 2.57e-03 56.210 57
CPL 1.000 0.000 50.0 0.0 1.44e-02 0.00e+00 64.200 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 69.488 0.112 69.600
T90 18.520 5.448 23.968
T50 27.632 16.568 44.200
Peak 1.000 12.260 13.260
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.5062 -26.2010 0.1296 36.1 126.0 0.6983 1.5 TRIG_00599954
------------------------------------------
Foreground time interval of the image:
0.112 69.600 (delta_t = 69.488 [sec])
Background time interval of the image:
-16.599 0.112 (delta_t = 16.711 [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 0.112 sec. to 69.600 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.49080 ( -0.677419 0.920258 )
Norm@50keV : 4.35532E-04 ( -0.000263454 0.000341505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.07 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.356551e-01
Photon flux (15-150 keV) in 69.49 sec: 0.174837 ( -0.0418775 0.0420305 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.73554e-07 ( -1.39674e-07 1.57059e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.112 sec. to 69.600 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81826 ( )
Epeak [keV] : 2.79998 ( )
Norm@50keV : 7.80078E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.97 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 56 degrees of freedom
# Null hypothesis probability = 4.026418e-01
Photon flux (15-150 keV) in 69.49 sec: 0.173172 ( -0.041465 0.042311 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.48088e-07 ( -1.33532e-07 1.76833e-07 ) ergs/cm2
Band function
Time interval is from 0.112 sec. to 69.600 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.38844 ( 1.21718 1.21718 )
beta : -4.12487 ( 4.1389 1.29793 )
Epeak [keV] : 7.11777 ( -6.93185 8.92563 )
Norm@50keV : 1.77820E-02 ( -0.0165686 43495.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.703504e-01
Photon flux (15-150 keV) in 69.49 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] : 4.36734 (-1.01896 1.27893)
R^2/D10^2 : 2.84703 (-2.84716 8.64714)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.95 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.040127e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.711e-07 1.559e-07
25- 50 1.249e-07 7.741e-08
50-150 2.522e-09 2.289e-09
15-150 3.985e-07 2.350e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1666 (-4.75117 8.85273)
Norm : 4.17155 (-2.2564 6.98768)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.05 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 57 degrees of freedom
# Null hypothesis probability = 4.365080e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.663e-07 1.246e-07
25- 50 1.463e-07 8.444e-08
50-150 1.647e-08 1.502e-08
15-150 4.291e-07 2.105e-07
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.01 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.96 using 59 PHA bins.
#Fit statistic : Chi-Squared = 57.66 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 55 degrees of freedom
# Reduced chi-squared = 1.055 for 55 degrees of freedom
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Reduced chi-squared = 1.048 for 55 degrees of freedom
# Null hypothesis probability = 3.629565e-01
# Null hypothesis probability = 3.649289e-01
# Null hypothesis probability = 3.668413e-01
# Null hypothesis probability = 3.770844e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.704e-07 1.605e-07
25- 50 1.384e-07 7.627e-08
50-150 5.116e-08 4.965e-08
15-150 4.600e-07 2.312e-07
Peak spectrum fit
Power-law model
Time interval is from 12.260 sec. to 13.260 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.35313 ( -0.896938 1.35182 )
Norm@50keV : 2.49642E-03 ( -0.00249659 0.00264959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.21 using 59 PHA bins.
# Reduced chi-squared = 0.9861 for 57 degrees of freedom
# Null hypothesis probability = 5.046797e-01
Photon flux (15-150 keV) in 1 sec: 0.897659 ( -0.342959 0.344834 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.60077e-08 ( -1.5948e-08 1.85475e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.260 sec. to 13.260 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.43845E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.20 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 56 degrees of freedom
# Null hypothesis probability = 2.111745e-01
Photon flux (15-150 keV) in 1 sec: 0.890739 ( -0.334127 0.338491 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.28896e-08 ( -1.53014e-08 1.94462e-08 ) ergs/cm2
Band function
Time interval is from 12.260 sec. to 13.260 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.61680 ( -6.34156 1.58898 )
beta : -9.37167 ( 9.37167 19.3713 )
Epeak [keV] : 5.92825 ( -4.96885 41.8823 )
Norm@50keV : 4.77057E-02 ( -0.0571056 1.4359e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.71 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 55 degrees of freedom
# Null hypothesis probability = 4.480212e-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] : 4.39574 (-1.43544 2.49965)
R^2/D10^2 : 14.3926 (-14.3926 104.625)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.96 using 59 PHA bins.
# Reduced chi-squared = 0.9818 for 57 degrees of freedom
# Null hypothesis probability = 5.140649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.030e-08 1.235e-08
25- 50 9.518e-09 6.295e-09
50-150 1.992e-10 2.036e-10
15-150 3.002e-08 1.896e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.5508 (-7.11571 18.0446)
Norm : 18.2208 (-6.77264 7.59126)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.69 using 59 PHA bins.
# Reduced chi-squared = 0.9771 for 57 degrees of freedom
# Null hypothesis probability = 5.241532e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.938e-08 2.737e-08
25- 50 1.198e-08 3.178e-08
50-150 1.721e-09 1.346e-08
15-150 3.308e-08 7.700e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.51927 (-3.52131 3.01253)
R1^2/D10^2 : 33.9552 (-33.9019 -33.9019)
kT2 [keV] : 8.55519 (-8.55729 -8.55729)
R2^2/D10^2 : 0.282227 (-0.281699 92.0083)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.39 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 55 degrees of freedom
# Null hypothesis probability = 4.597413e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.994e-08 1.168e-08
25- 50 1.161e-08 8.120e-09
50-150 2.518e-09 1.690e-09
15-150 3.407e-08 1.864e-08
Plot creation:
Mon May 26 17:38:43 EDT 2014