batgrbproduct Analysis for Trigger=616061
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 22 09:57:34 EDT 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger616061/GCN5_download_cron
======================================================================
Trigger: 00616061 Segment: 000
BAT Trigger Time: 435634075.456 [s; MET]
Trigger Stop: 435634083.648 [s; MET]
UTC: 2014-10-22T01:27:42.770160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 241.90130639089 Dec: -72.1292547480145 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.94
Image Trigger?: NO
Rate S/N Ratio: 14.0356688476182 [ if not an image trigger ]
Image S/N Ratio: 7.94
Flight Position: [ source = BAT ]
RA: 241.90130639089 Dec: -72.1292547480145 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 241.929523331205 Dec: -72.1518734226555 [deg; J2000]
{ 16h 07m 43.1s , -72d 09' 06.7" }
+/- 2.2129106957427 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05282590687888 [arcmin] (formal 1-sigma fit error)
SNR: 9.7794138648759
Angular difference between Flight and Ground position is 1.453053 arcmin
Partial Coding Fraction: 0.3984375 [ including projection effects ]
Duration
T90: 8.71599990129471 +/- 1.5595947757381
Measured from: -0.0599998235702515
to: 8.65600007772446 [s; relative to TRIGTIME]
T50: 4.79199993610382 +/- 1.58170035497258
Measured from: 1.98400014638901
to: 6.77600008249283 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.19600003957748
to: 7.19600003957748 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.383999943733215
to: 9.17200005054474 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.111320 0.252006 0.225848 0.096334
0.038793 0.036355 0.031049 0.027722 [error]
Peak 0.021502 0.035654 0.035720 0.021691
0.012582 0.011784 0.010102 0.008802 [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 5.14e-08 1.06e-07 1.71e-07 6.20e-07 4.75e-07 9.49e-07 erg/cm2
Error 1.57e-08 1.95e-08 2.90e-08 2.39e-07 7.42e-08 2.52e-07 erg/cm2
Peak flux Power-law 2.24e-01 2.85e-01 2.65e-01 4.31e-01 9.20e-01 1.21e+00 ph/cm2/s
Error 1.63e-01 1.24e-01 7.80e-02 3.14e-01 3.12e-01 3.46e-01 ph/cm2/s
Fluence Cutoff-PL 4.64e-08 1.11e-07 1.79e-07 3.29e-07 4.62e-07 6.64e-07 erg/cm2
Error 1.90e-08 2.29e-08 3.47e-08 3.43e-07 8.28e-08 3.16e-07 erg/cm2
Peak flux Cutoff-PL 2.40e-01 2.95e-01 2.63e-01 4.05e-01 9.36e-01 1.21e+00 ph/cm2/s
Error 1.66e-01 1.25e-01 8.00e-02 4.11e-01 2.96e-01 7.70e-01 ph/cm2/s
Fluence Band 4.18e-08 1.14e-07 1.78e-07 4.18e-07 4.56e-07 7.51e-07 erg/cm2
Error -------- 2.89e-08 -------- -------- 8.96e-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 1.309 0.266 - - 5.04e-03 7.67e-04 73.150 57
CPL 0.823 1.106 130.5 0.0 8.56e-03 1.86e-02 72.660 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.108 0.614 - - 7.93e-03 2.53e-03 57.850 57
CPL 1.126 0.763 9999.4 0.0 8.01e-03 1.05e-02 57.860 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: 8.448000 sec.
T50 in the 50-300 keV band: 4.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 9.556 -0.384 9.172
T90 8.716 -0.060 8.656
T50 4.792 1.984 6.776
Peak 1.000 6.196 7.196
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
241.9295 -72.1519 0.0197 45.2 -174.6 0.6937 9.8 TRIG_00616061
------------------------------------------
Foreground time interval of the image:
-0.384 9.172 (delta_t = 9.556 [sec])
Background time interval of the image:
-107.955 -0.384 (delta_t = 107.571 [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 -0.384 sec. to 9.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30918 ( -0.271063 0.260406 )
Norm@50keV : 5.03885E-03 ( -0.00076819 0.000765855 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.15 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.345069e-02
Photon flux (15-150 keV) in 9.556 sec: 0.602181 ( -0.099565 0.100729 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.74767e-07 ( -7.40709e-08 7.43797e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.384 sec. to 9.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.823333 ( -1.50256 0.708885 )
Epeak [keV] : 130.477 ( -130.537 -130.537 )
Norm@50keV : 8.55659E-03 ( -0.00416999 0.0329621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.66 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 56 degrees of freedom
# Null hypothesis probability = 6.651097e-02
Photon flux (15-150 keV) in 9.556 sec: 0.588883 ( -0.10489 0.10548 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.61695e-07 ( -8.45352e-08 8.09804e-08 ) ergs/cm2
Band function
Time interval is from -0.384 sec. to 9.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95450 ( -13.1459 -4.9545 )
beta : -1.49156 ( -0.349045 0.324051 )
Epeak [keV] : 31.7402 ( -12.9201 23.314 )
Norm@50keV : 103.516 ( -15.4101 2617.37 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.25 using 59 PHA bins.
# Reduced chi-squared = 1.277 for 55 degrees of freedom
# Null hypothesis probability = 8.075971e-02
Photon flux (15-150 keV) in 9.556 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.56353e-07 ( -4.56287e-07 -7.92517e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.5269 (-2.85284 3.72958)
R^2/D10^2 : 4.20209E-02 (-0.0207113 0.0367423)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.00 using 59 PHA bins.
# Reduced chi-squared = 1.368 for 57 degrees of freedom
# Null hypothesis probability = 3.379843e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.490e-08 8.715e-09
25- 50 1.129e-07 2.939e-08
50-150 2.498e-07 7.124e-08
15-150 3.876e-07 8.084e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.57624 (-0.39198 0.391871)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.30 using 59 PHA bins.
# Reduced chi-squared = 1.321 for 57 degrees of freedom
# Null hypothesis probability = 5.265761e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.134e-08 3.493e-08
25- 50 1.180e-07 6.536e-08
50-150 2.588e-07 1.437e-07
15-150 4.381e-07 2.446e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.9531 (-2.45253 3.43006)
R1^2/D10^2 : 9.89665E-02 (-0.053991 0.0820984)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 6.92705E-05 (-3.68569e-05 0.000476677)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 69.64 using 59 PHA bins.
# Reduced chi-squared = 1.267 for 55 degrees of freedom
# Reduced chi-squared = 1.266 for 55 degrees of freedom
# Null hypothesis probability = 8.816625e-02
# Null hypothesis probability = 8.836567e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.500e-08 2.021e-08
25- 50 1.231e-07 6.976e-08
50-150 2.966e-07 1.061e-07
15-150 4.547e-07 1.796e-07
Peak spectrum fit
Power-law model
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10834 ( -0.662542 0.564939 )
Norm@50keV : 7.92706E-03 ( -0.00264647 0.00242077 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.438599e-01
Photon flux (15-150 keV) in 1 sec: 0.920215 ( -0.307335 0.316359 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26597e-08 ( -2.39129e-08 2.39418e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12645 ( -0.977859 0.547456 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 8.00763E-03 ( -0.00234063 0.0186716 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.86 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 56 degrees of freedom
# Null hypothesis probability = 4.064978e-01
Photon flux (15-150 keV) in 1 sec: 0.935855 ( -0.298863 0.293955 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.26123e-08 ( -2.38618e-08 2.35217e-08 ) ergs/cm2
Band function
Time interval is from 6.196 sec. to 7.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.888637 ( 0.88854 0.88854 )
beta : -1.10837 ( 1.10829 0.66283 )
Epeak [keV] : 47.7134 ( -47.7951 -47.7951 )
Norm@50keV : 1.42460E-02 ( -0.00858997 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.706655e-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] : 27.6923 (-11.4316 31.3905)
R^2/D10^2 : 1.45669E-02 (-0.0142768 0.0657694)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.852598e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.833e-09 1.223e-09
25- 50 1.093e-08 6.930e-09
50-150 6.079e-08 3.764e-08
15-150 7.355e-08 4.459e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-81.4737 -199.363)
Norm : 4.08163 (-1.20621 1.20629)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.34 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.560520e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.016e-08 6.275e-09
25- 50 1.955e-08 1.182e-08
50-150 4.288e-08 2.630e-08
15-150 7.259e-08 4.339e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.86807 (-4.49595 7.03832)
R1^2/D10^2 : 0.702218 (-0.640139 20.7658)
kT2 [keV] : 59.1833 (-57.1766 -60.6115)
R2^2/D10^2 : 1.58942E-03 (-0.00129662 0.0116848)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.94 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.028472e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.294e-09 5.575e-09
25- 50 1.717e-08 1.082e-08
50-150 5.978e-08 3.387e-08
15-150 8.524e-08 4.294e-08
Plot creation:
Wed Oct 22 10:02:50 EDT 2014