batgrbproduct Analysis for Trigger=615399
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): Wed Oct 15 23:19:24 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger615399/GCN5_download_cron
======================================================================
Trigger: 00615399 Segment: 000
BAT Trigger Time: 435057192 [s; MET]
Trigger Stop: 435057194.048 [s; MET]
UTC: 2014-10-15T09:12:59.342640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 87.5070360636474 Dec: 18.3158336047902 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.99
Image Trigger?: NO
Rate S/N Ratio: 9.79795897113271 [ if not an image trigger ]
Image S/N Ratio: 7.99
Flight Position: [ source = BAT ]
RA: 87.5070360636474 Dec: 18.3158336047902 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 87.5353063401463 Dec: 18.3701339129272 [deg; J2000]
{ 05h 50m 08.5s , +18d 22' 12.5" }
+/- 2.23021472532352 [arcmin] (estimated 90% radius based on SNR)
+/- 0.898234058753995 [arcmin] (formal 1-sigma fit error)
SNR: 9.67119783059439
Angular difference between Flight and Ground position is 3.634128 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 11 +/- 4.12310562561766
Measured from: 1.19209289550781e-07
to: 11.0000001192093 [s; relative to TRIGTIME]
T50: 5 +/- 2.23606797749979
Measured from: 1.00000011920929
to: 6.00000011920929 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1
to: 2 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 13 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.121008 0.108489 0.064829 0.029422
0.021270 0.021499 0.018279 0.015566 [error]
Peak 0.028057 0.033039 0.006965 -0.003508
0.006070 0.006212 0.005168 0.004212 [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 3.21e-08 4.62e-08 4.94e-08 9.83e-08 1.58e-07 2.26e-07 erg/cm2
Error 8.55e-09 9.15e-09 1.69e-08 6.71e-08 3.92e-08 8.60e-08 erg/cm2
Peak flux Power-law 2.51e-01 1.77e-01 8.29e-02 5.43e-02 5.37e-01 5.66e-01 ph/cm2/s
Error 7.69e-02 4.62e-02 3.51e-02 4.14e-02 1.36e-01 1.47e-01 ph/cm2/s
Fluence Cutoff-PL 3.19e-08 4.71e-08 4.88e-08 7.03e-08 1.55e-07 1.95e-07 erg/cm2
Error 8.77e-09 1.17e-08 2.14e-08 6.94e-08 4.60e-08 1.06e-07 erg/cm2
Peak flux Cutoff-PL 2.25e-01 2.73e-01 2.50e-02 2.60e-05 5.23e-01 5.23e-01 ph/cm2/s
Error 8.72e-02 7.29e-02 4.04e-02 2.42e-03 1.28e-01 1.28e-01 ph/cm2/s
Fluence Band 3.98e-08 6.05e-08 4.93e-08 6.74e-08 1.75e-07 2.18e-07 erg/cm2
Error 1.13e-08 1.39e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.902 0.368 - - 1.32e-03 3.32e-04 66.780 57
CPL 1.757 0.000 64.6 0.0 1.63e-03 0.00e+00 66.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.101 0.420 - - 3.41e-03 1.14e-03 51.540 57
CPL -4.014 0.097 31.3 6.1 4.31e+01 0.00e+00 42.270 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 13.000 0.000 13.000
T90 11.000 0.000 11.000
T50 5.000 1.000 6.000
Peak 1.000 1.000 2.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
87.5353 +18.3701 0.0200 10.0 -85.5 0.3690 9.7 TRIG_00615399
------------------------------------------
Foreground time interval of the image:
0.000 13.000 (delta_t = 13.000 [sec])
Background time interval of the image:
-239.000 0.000 (delta_t = 239.000 [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 0.000 sec. to 13.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90213 ( -0.3523 0.382734 )
Norm@50keV : 1.32340E-03 ( -0.000338772 0.000325725 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.78 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 57 degrees of freedom
# Null hypothesis probability = 1.762249e-01
Photon flux (15-150 keV) in 13 sec: 0.190094 ( -0.0370456 0.0370466 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58174e-07 ( -3.82372e-08 4.01496e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 13.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.75693 ( )
Epeak [keV] : 64.5640 ( )
Norm@50keV : 1.62607E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.75 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 56 degrees of freedom
# Null hypothesis probability = 1.540955e-01
Photon flux (15-150 keV) in 13 sec: 0.189162 ( -0.037152 0.037698 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5487e-07 ( -4.90664e-08 4.28506e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 13.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94156 ( -4.94156 -4.94156 )
beta : -2.20057 ( -1.04654 0.481672 )
Epeak [keV] : 23.7848 ( -23.7848 6.39604 )
Norm@50keV : 269.829 ( -51.7772 1.45626e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.58 using 59 PHA bins.
# Reduced chi-squared = 1.174 for 55 degrees of freedom
# Null hypothesis probability = 1.767676e-01
Photon flux (15-150 keV) in 13 sec: 0.221377 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74504e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.18947 (-1.64276 2.31558)
R^2/D10^2 : 0.191240 (-0.118708 0.26954)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.41 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.488581e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.066e-08 1.285e-08
25- 50 5.587e-08 1.986e-08
50-150 1.584e-08 1.058e-08
15-150 1.024e-07 4.068e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 71.5249 (-34.3687 117.027)
Norm : 0.930035 (-0.241685 0.382918)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.96 using 59 PHA bins.
# Reduced chi-squared = 1.175 for 57 degrees of freedom
# Null hypothesis probability = 1.722550e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.109e-08 8.639e-09
25- 50 4.975e-08 1.615e-08
50-150 6.492e-08 5.041e-08
15-150 1.458e-07 5.700e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53387 (-1.6711 1.00742)
R1^2/D10^2 : 0.395361 (-0.24991 0.781038)
kT2 [keV] : 36.1935 (-19.8552 -36.2109)
R2^2/D10^2 : 6.10744E-04 (-0.000597899 0.00617451)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.42 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 55 degrees of freedom
# Null hypothesis probability = 2.039508e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.407e-08 1.952e-08
25- 50 4.847e-08 2.692e-08
50-150 8.493e-08 4.950e-08
15-150 1.675e-07 8.489e-08
Peak spectrum fit
Power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10106 ( -0.391937 0.448957 )
Norm@50keV : 3.41151E-03 ( -0.00114409 0.00114349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 0.9042 for 57 degrees of freedom
# Null hypothesis probability = 6.793957e-01
Photon flux (15-150 keV) in 1 sec: 0.537065 ( -0.135968 0.136222 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17503e-08 ( -9.54071e-09 1.01873e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.01363 ( 2.87038 3.06518 )
Epeak [keV] : 31.2571 ( -5.18479 7.02617 )
Norm@50keV : 43.0599 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.27 using 59 PHA bins.
# Reduced chi-squared = 0.7549 for 56 degrees of freedom
# Null hypothesis probability = 9.125774e-01
Photon flux (15-150 keV) in 1 sec: 0.523108 ( -0.128115 0.12859 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43434e-08 ( -6.8574e-09 7.7151e-09 ) ergs/cm2
Band function
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -4.4102 -5 )
beta : -3.61265 ( 3.61126 1.09468 )
Epeak [keV] : 29.1679 ( -4.49325 4.77205 )
Norm@50keV : 295.006 ( -66.7818 568.486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.07 using 59 PHA bins.
# Reduced chi-squared = 0.7467 for 55 degrees of freedom
# Null hypothesis probability = 9.186013e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93813e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.33575 (-1.54216 1.94549)
R^2/D10^2 : 0.581083 (-0.331911 0.714187)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.98 using 59 PHA bins.
# Reduced chi-squared = 0.7540 for 57 degrees of freedom
# Null hypothesis probability = 9.155904e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.515e-09 3.442e-09
25- 50 1.411e-08 5.735e-09
50-150 4.233e-09 2.926e-09
15-150 2.586e-08 1.096e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 45.2803 (-18.6754 45.0509)
Norm : 3.36750 (-1.12166 1.66838)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.96 using 59 PHA bins.
# Reduced chi-squared = 0.8415 for 57 degrees of freedom
# Null hypothesis probability = 7.974226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.031e-09 2.878e-09
25- 50 1.112e-08 4.866e-09
50-150 9.798e-09 7.098e-09
15-150 2.894e-08 1.502e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.33870 (-8.33605 -8.33605)
R1^2/D10^2 : 0.309702 (-0.309692 -0.309692)
kT2 [keV] : 8.33223 (-8.33605 -8.33605)
R2^2/D10^2 : 0.271398 (-0.27139 -0.27139)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.98 using 59 PHA bins.
# Reduced chi-squared = 0.7814 for 55 degrees of freedom
# Null hypothesis probability = 8.805426e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.515e-09 1.806e+00
25- 50 1.411e-08 1.591e+01
50-150 4.233e-09 3.995e+02
15-150 2.586e-08 4.026e+02
Plot creation:
Wed Oct 15 23:24:16 EDT 2014