batgrbproduct Analysis for Trigger=618024
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 Nov 10 01:17:56 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger618024/GCN5_download_cron
======================================================================
Trigger: 00618024 Segment: 000
BAT Trigger Time: 437205008 [s; MET]
Trigger Stop: 437205072 [s; MET]
UTC: 2014-11-09T05:49:55.236180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 144.507384595436 Dec: -0.601526628868278 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.73
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.73
Flight Position: [ source = BAT ]
RA: 144.507384595436 Dec: -0.601526628868278 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 144.561979494116 Dec: -0.580896440151201 [deg; J2000]
{ 09h 38m 14.9s , -00d 34' 51.2" }
+/- 2.99365400469306 [arcmin] (estimated 90% radius based on SNR)
+/- 1.60996763664346 [arcmin] (formal 1-sigma fit error)
SNR: 6.35082832601307
Angular difference between Flight and Ground position is 3.501600 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 197.627999961376 +/- 45.80826427794
Measured from: 16.8200001120567
to: 214.448000073433 [s; relative to TRIGTIME]
T50: 48.3879999518394 +/- 11.462992989462
Measured from: 96.1360000967979
to: 144.524000048637 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 117.39200001955
to: 118.39200001955 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.596000015735626
to: 323.152000010014 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.975844 4.145259 3.176070 0.754909
0.114217 0.118791 0.103512 0.091622 [error]
Peak 0.071119 0.111348 0.099801 0.035819
0.006949 0.007942 0.007226 0.005971 [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 9.38e-07 1.70e-06 2.38e-06 6.94e-06 6.83e-06 1.20e-05 erg/cm2
Error 6.25e-08 6.50e-08 1.06e-07 7.06e-07 2.55e-07 7.69e-07 erg/cm2
Peak flux Power-law 6.48e-01 7.83e-01 6.84e-01 1.03e+00 2.47e+00 3.14e+00 ph/cm2/s
Error 9.26e-02 6.68e-02 5.90e-02 1.92e-01 1.85e-01 2.47e-01 ph/cm2/s
Fluence Cutoff-PL 9.23e-07 1.72e-06 2.39e-06 6.17e-06 6.79e-06 1.12e-05 erg/cm2
Error 7.56e-08 5.39e-08 1.13e-07 1.30e-06 2.84e-07 1.29e-06 erg/cm2
Peak flux Cutoff-PL 6.48e-01 7.83e-01 6.84e-01 1.02e+00 2.47e+00 3.13e+00 ph/cm2/s
Error 9.32e-02 6.61e-02 5.12e-02 2.11e-01 1.84e-01 2.96e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.519 0.066 - - 2.24e-03 7.72e-05 51.850 57
CPL 1.440 0.192 374.3 0.0 2.44e-03 5.07e-04 51.540 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.194 0.132 - - 2.11e-02 1.54e-03 50.880 57
CPL 1.190 0.239 10000.0 0.0 2.12e-02 1.54e-03 50.910 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: 140.224000 sec.
T50 in the 50-300 keV band: 46.656000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 322.556 0.596 323.152
T90 197.628 16.820 214.448
T50 48.388 96.136 144.524
Peak 1.000 117.392 118.392
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
144.5620 -0.5809 0.0302 22.3 70.1 1.6620 6.4 TRIG_00618024
------------------------------------------
Foreground time interval of the image:
0.596 73.501 (delta_t = 72.905 [sec])
Background time interval of the image:
-17.699 0.596 (delta_t = 18.295 [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 0.596 sec. to 323.152 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.51872 ( -0.0659599 0.066041 )
Norm@50keV : 2.23823E-03 ( -7.72052e-05 7.71196e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.85 using 59 PHA bins.
# Reduced chi-squared = 0.9097 for 57 degrees of freedom
# Null hypothesis probability = 6.679908e-01
Photon flux (15-150 keV) in 322.6 sec: 0.280849 ( -0.0103051 0.0103451 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.82931e-06 ( -2.54179e-07 2.55353e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.596 sec. to 323.152 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44016 ( -0.249872 0.133222 )
Epeak [keV] : 374.324 ( -374.324 -374.324 )
Norm@50keV : 2.44041E-03 ( -0.000268163 0.000745498 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.54 using 59 PHA bins.
# Reduced chi-squared = 0.9204 for 56 degrees of freedom
# Null hypothesis probability = 6.441681e-01
Photon flux (15-150 keV) in 322.6 sec: 0.279257 ( -0.01128 0.011242 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.78896e-06 ( -2.86727e-07 2.8221e-07 ) ergs/cm2
Band function
Time interval is from 0.596 sec. to 323.152 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.113701 ( 0.805637 0.805637 )
beta : -1.55915 ( -0.0958541 0.0790018 )
Epeak [keV] : 37.6154 ( -37.6453 261.731 )
Norm@50keV : 2.12600E-02 ( -0.0216494 141.619 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.80 using 59 PHA bins.
# Reduced chi-squared = 0.9055 for 55 degrees of freedom
# Null hypothesis probability = 6.729276e-01
Photon flux (15-150 keV) in 322.6 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] : 15.9786 ( )
R^2/D10^2 : 2.42575E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 256.18 using 59 PHA bins.
# Reduced chi-squared = 4.4944 for 57 degrees of freedom
# Null hypothesis probability = 4.707610e-27
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.132e-07 3.032e-08
25- 50 1.737e-06 8.130e-08
50-150 3.098e-06 2.019e-07
15-150 5.248e-06 2.065e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 1.14301 (-0.039064 0.0390637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.79 using 59 PHA bins.
# Reduced chi-squared = 0.9787 for 57 degrees of freedom
# Null hypothesis probability = 5.207376e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.184e-07 3.791e-08
25- 50 1.767e-06 6.758e-08
50-150 3.874e-06 1.323e-07
15-150 6.559e-06 2.452e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.84617 (-0.706506 0.771534)
R1^2/D10^2 : 0.322073 (-0.101771 0.159585)
kT2 [keV] : 27.6752 (-2.84142 3.74496)
R2^2/D10^2 : 2.98986E-03 (-0.00105107 0.0013949)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.51 using 59 PHA bins.
# Reduced chi-squared = 0.8274 for 55 degrees of freedom
# Null hypothesis probability = 8.154945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.853e-07 1.050e-07
25- 50 1.724e-06 1.224e-07
50-150 4.170e-06 4.904e-07
15-150 6.779e-06 6.242e-07
Peak spectrum fit
Power-law model
Time interval is from 117.392 sec. to 118.392 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19414 ( -0.132192 0.130926 )
Norm@50keV : 2.11022E-02 ( -0.00153606 0.00153592 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.88 using 59 PHA bins.
# Reduced chi-squared = 0.8927 for 57 degrees of freedom
# Null hypothesis probability = 7.025906e-01
Photon flux (15-150 keV) in 1 sec: 2.47494 ( -0.18434 0.184668 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.14446e-07 ( -1.76689e-08 1.77701e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 117.392 sec. to 118.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18996 ( -0.298222 0.180147 )
Epeak [keV] : 1.00000E+04 ( )
Norm@50keV : 2.12035E-02 ( -0.0015433 0.00154292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.9090 for 56 degrees of freedom
# Null hypothesis probability = 6.675611e-01
Photon flux (15-150 keV) in 1 sec: 2.47445 ( -0.18391 0.18426 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.13894e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from 117.392 sec. to 118.392 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.515085 ( 0.81182 5.63538 )
beta : -1.21469 ( 1.2049 0.140533 )
Epeak [keV] : 59.1901 ( -58.318 389.206 )
Norm@50keV : 6.43402E-02 ( -0.0658452 1.23485e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.75 using 59 PHA bins.
# Reduced chi-squared = 0.9227 for 55 degrees of freedom
# Null hypothesis probability = 6.376396e-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] : 18.4910 (-1.94798 2.2773)
R^2/D10^2 : 0.144331 (-0.0455015 0.0643052)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 103.43 using 59 PHA bins.
# Reduced chi-squared = 1.8146 for 57 degrees of freedom
# Null hypothesis probability = 1.653280e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.793e-09 1.522e-09
25- 50 4.620e-08 4.865e-09
50-150 1.154e-07 1.514e-08
15-150 1.714e-07 1.700e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 10.1538 (-0.755213 0.755163)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.58 using 59 PHA bins.
# Reduced chi-squared = 1.273 for 57 degrees of freedom
# Null hypothesis probability = 7.995466e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.529e-08 2.365e-09
25- 50 4.865e-08 6.980e-09
50-150 1.067e-07 4.176e-08
15-150 1.806e-07 4.983e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.19450 ( )
R1^2/D10^2 : 1.02348 (-0.572495 1.10475)
kT2 [keV] : 50.5914 (-16.5799 124.925)
R2^2/D10^2 : 5.44903E-03 (-0.00526194 0.0124474)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.47 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.37 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Reduced chi-squared = 0.9340 for 55 degrees of freedom
# Null hypothesis probability = 4.568182e-01
# Null hypothesis probability = 6.140654e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.929e-08 1.071e-08
25- 50 4.267e-08 1.944e-08
50-150 1.382e-07 7.379e-08
15-150 2.002e-07 8.562e-08
Plot creation:
Mon Nov 10 01:22:54 EST 2014