batgrbproduct Analysis for Trigger=605612
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): Sat Jul 19 22:07:14 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/trigger605612
======================================================================
Trigger: 00605612 Segment: 000
BAT Trigger Time: 427442047.488 [s; MET]
Trigger Stop: 427442048.512 [s; MET]
UTC: 2014-07-19T05:53:55.204500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 171.592074083928 Dec: -50.1345189156071 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.92
Image Trigger?: NO
Rate S/N Ratio: 7.14142842854285 [ if not an image trigger ]
Image S/N Ratio: 6.92
Flight Position: [ source = BAT ]
RA: 171.592074083928 Dec: -50.1345189156071 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 171.57124258296 Dec: -50.1153193404698 [deg; J2000]
{ 11h 26m 17.1s , -50d 06' 55.1" }
+/- 2.42349151941687 [arcmin] (estimated 90% radius based on SNR)
+/- 1.53918923445099 [arcmin] (formal 1-sigma fit error)
SNR: 8.5884784635106
Angular difference between Flight and Ground position is 1.403270 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -31.4879999756813
to: 16.5120000243187 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: -15.4879999756813
to: 0.512000024318695 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.0120000243187
to: 9.0120000243187 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.4879999756813
to: 16.5120000243187 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.238728 0.314772 0.196743 0.036398
0.043527 0.043318 0.038236 0.034547 [error]
Peak 0.017079 0.002540 0.004581 0.001430
0.006216 0.006279 0.005524 0.005292 [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 8.64e-08 1.25e-07 1.34e-07 2.69e-07 4.29e-07 6.15e-07 erg/cm2
Error 1.96e-08 2.02e-08 3.55e-08 1.41e-07 8.33e-08 1.80e-07 erg/cm2
Peak flux Power-law 1.23e-01 5.23e-02 1.32e-02 4.07e-03 1.91e-01 1.94e-01 ph/cm2/s
Error 9.40e-02 5.30e-02 2.58e-02 2.53e-02 1.45e-01 1.48e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.78e-01 3.72e-02 9.49e-06 1.88e-15 2.15e-01 2.15e-01 ph/cm2/s
Error 1.08e-01 3.73e-02 7.15e-03 0.00e+00 1.27e-01 1.27e-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 1.895 0.291 - - 9.72e-04 1.90e-04 51.100 57
CPL 0.843 1.356 47.6 -14.7 3.80e-03 1.44e-02 48.750 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 2.985 2.211 - - 7.03e-04 1.00e-03 56.840 57
CPL -9.984 0.979 20.2 4.9 2.49e+07 2.83e+08 54.010 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 48.000 -31.488 16.512
T90 48.000 -31.488 16.512
T50 16.000 -15.488 0.512
Peak 1.000 8.012 9.012
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
171.5712 -50.1153 0.0224 32.4546 -12.8879 0.7241110 8.588 TRIG_00605612
Foreground time interval of the image:
-31.488 11.213 (delta_t = 42.701 [sec])
Background time interval of the image:
-239.488 -31.488 (delta_t = 208.000 [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 -31.488 sec. to 16.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89505 ( -0.27924 0.301785 )
Norm@50keV : 9.71748E-04 ( -0.00019316 0.000187543 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.8965 for 57 degrees of freedom
# Null hypothesis probability = 6.949758e-01
Photon flux (15-150 keV) in 48 sec: 0.139164 ( -0.022518 0.0225236 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.28822e-07 ( -8.20258e-08 8.45227e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.488 sec. to 16.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.843370 ( -1.55527 1.15726 )
Epeak [keV] : 47.6396 ( -18.1728 -47.6396 )
Norm@50keV : 3.79885E-03 ( -0.00379886 0.0250415 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.75 using 59 PHA bins.
# Reduced chi-squared = 0.8706 for 56 degrees of freedom
# Null hypothesis probability = 7.431854e-01
Photon flux (15-150 keV) in 48 sec: 0.134509 ( -0.022341 0.023053 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -31.488 sec. to 16.512 sec.
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0971 (-1.98388 2.36679)
R^2/D10^2 : 4.53384E-02 (-0.0233502 0.0491099)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.21 using 59 PHA bins.
# Reduced chi-squared = 0.9511 for 57 degrees of freedom
# Null hypothesis probability = 5.803208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.609e-08 1.648e-08
25- 50 1.604e-07 4.085e-08
50-150 1.123e-07 4.421e-08
15-150 3.288e-07 8.938e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 78.1853 (-30.3484 71.0017)
Norm : 0.664973 (-0.142896 0.184538)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.13 using 59 PHA bins.
# Reduced chi-squared = 0.8620 for 57 degrees of freedom
# Null hypothesis probability = 7.612772e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.269e-08 1.838e-08
25- 50 1.354e-07 2.957e-08
50-150 1.881e-07 1.233e-07
15-150 4.062e-07 1.413e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27475 (-3.45793 3.9511)
R1^2/D10^2 : 0.393233 (-0.325703 94.935)
kT2 [keV] : 16.0388 (-4.88868 15.3334)
R2^2/D10^2 : 8.73331E-03 (-0.0079467 0.0324146)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.47 using 59 PHA bins.
# Reduced chi-squared = 0.8813 for 55 degrees of freedom
# Null hypothesis probability = 7.206978e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.887e-08 4.344e-08
25- 50 1.360e-07 6.780e-08
50-150 1.713e-07 1.059e-07
15-150 3.862e-07 1.960e-07
Peak spectrum fit
Power-law model
Time interval is from 8.012 sec. to 9.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.98467 ( -1.58447 2.83764 )
Norm@50keV : 7.03170E-04 ( -0.000701459 0.00129849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 0.9973 for 57 degrees of freedom
# Null hypothesis probability = 4.808983e-01
Photon flux (15-150 keV) in 1 sec: 0.191127 ( -0.142113 0.147898 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.37432e-09 ( -8.37432e-09 1.00723e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.012 sec. to 9.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.98365 ( 9.99531 11.954 )
Epeak [keV] : 20.2223 ( -4.51697 5.25747 )
Norm@50keV : 2.48571E+07 ( -2.60466e+07 5.39846e+08 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9644 for 56 degrees of freedom
# Null hypothesis probability = 5.506177e-01
Photon flux (15-150 keV) in 1 sec: 0.214786 ( -0.126433 0.126732 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.13396e-09 ( -4.24964e-09 4.58524e-09 ) ergs/cm2
Band function
Time interval is from 8.012 sec. to 9.012 sec.
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.37836 (-1.85528 3.90866)
R^2/D10^2 : 3.33135 (-3.28364 45.0813)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
# Reduced chi-squared = 0.9758 for 57 degrees of freedom
# Null hypothesis probability = 5.269732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.617e-09 2.790e-09
25- 50 2.141e-09 1.512e-09
50-150 4.385e-11 6.665e-11
15-150 6.802e-09 5.010e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3847 (-13.4661 157.569)
Norm : 3.93746 (-3.89884 2.72867)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.40 using 59 PHA bins.
# Reduced chi-squared = 0.9894 for 57 degrees of freedom
# Null hypothesis probability = 4.977274e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.121e-09 2.716e-09
25- 50 2.516e-09 1.782e-09
50-150 3.517e-10 3.999e-10
15-150 6.989e-09 4.738e-09
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.34668 (-1.83155 3.92962)
R1^2/D10^2 : 3.41021 (-3.04707 45.1661)
kT2 [keV] : 27.6999 ( )
R2^2/D10^2 : 2.89593E-04 (-0.000309393 0.0252846)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.62 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.512980e-01
# Null hypothesis probability = 4.525769e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Sat Jul 19 22:12:44 EDT 2014