batgrbproduct Analysis for Trigger=618391
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 Nov 12 19:17:17 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger618391/GCN5_download_cron
======================================================================
Trigger: 00618391 Segment: 000
BAT Trigger Time: 437458928 [s; MET]
Trigger Stop: 437458992 [s; MET]
UTC: 2014-11-12T04:21:55.223560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.919706335918 Dec: -15.8391561040742 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.03
Flight Position: [ source = BAT ]
RA: 244.919706335918 Dec: -15.8391561040742 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.97977296664 Dec: -15.6474098177276 [deg; J2000]
{ 16h 19m 55.1s , -15d 38' 50.7" }
+/- 0.928163707099892 [arcmin] (estimated 90% radius based on SNR)
+/- 0.334088175478463 [arcmin] (formal 1-sigma fit error)
SNR: 33.8352177769846
Angular difference between Flight and Ground position is 12.016342 arcmin
Partial Coding Fraction: 0.390625 [ including projection effects ]
Duration
T90: 386.655999958515 +/- 33.434647019577
Measured from: -48.6279999017715
to: 338.028000056744 [s; relative to TRIGTIME]
T50: 192.323999941349 +/- 30.1117487599837
Measured from: 30.6360000967979
to: 222.960000038147 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 127.804000020027
to: 128.804000020027 [s; relative to TRIGTIME]
Total Fluence
Measured from: -69.2039999961853
to: 374.948000013828 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.076437 1.431241 0.050282 0.261021
0.239596 0.210660 0.173943 0.145599 [error]
Peak 0.037827 0.028651 0.015923 0.009253
0.011123 0.009790 0.008269 0.007242 [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 3.12e-06 6.35e-07 6.41e-08 7.09e-09 3.82e-06 3.82e-06 erg/cm2
Error 3.17e-07 1.15e-07 2.88e-08 5.57e-09 3.28e-07 3.28e-07 erg/cm2
Peak flux Power-law 3.79e-01 2.38e-01 9.65e-02 5.29e-02 7.40e-01 7.66e-01 ph/cm2/s
Error 1.79e-01 8.47e-02 6.39e-02 7.46e-02 2.53e-01 2.61e-01 ph/cm2/s
Fluence Cutoff-PL 3.11e-06 5.80e-07 2.07e-08 1.11e-10 3.71e-06 3.71e-06 erg/cm2
Error 3.26e-07 1.52e-07 4.51e-08 6.25e-09 3.62e-07 3.62e-07 erg/cm2
Peak flux Cutoff-PL 3.61e-01 2.50e-01 9.69e-02 3.13e-02 7.29e-01 7.41e-01 ph/cm2/s
Error 2.81e-01 1.05e-01 6.90e-02 5.42e-02 2.63e-01 2.78e-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 5.307 0.394 - - 1.33e-04 4.74e-05 65.540 57
CPL 1.000 0.000 50.0 0.0 1.82e-03 0.00e+00 323.060 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.303 0.792 - - 4.23e-03 3.14e-03 65.740 57
CPL 1.842 0.000 14.6 0.0 7.73e-03 0.00e+00 65.680 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 444.152 -69.204 374.948
T90 386.656 -48.628 338.028
T50 192.324 30.636 222.960
Peak 1.000 127.804 128.804
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9798 -15.6474 0.0057 31.9 -77.5 17.5445 33.8 TRIG_00618391
------------------------------------------
Foreground time interval of the image:
-12.799 353.301 (delta_t = 366.100 [sec])
Background time interval of the image:
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 -69.204 sec. to 374.948 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.30708 ( -0.38552 0.401657 )
Norm@50keV : 1.32630E-04 ( -4.12125e-05 5.34914e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.54 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 57 degrees of freedom
# Null hypothesis probability = 2.048364e-01
Photon flux (15-150 keV) in 444.2 sec: 0.275101 ( -0.0255081 0.0256773 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82267e-06 ( -3.27637e-07 3.28019e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -69.204 sec. to 374.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.81621E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 323.06 using 59 PHA bins.
# Reduced chi-squared = 5.7690 for 56 degrees of freedom
# Null hypothesis probability = 3.255457e-39
Photon flux (15-150 keV) in 444.2 sec: 0.270318 ( -0.02726 0.026932 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.71132e-06 ( -3.6061e-07 3.63347e-07 ) ergs/cm2
Band function
Time interval is from -69.204 sec. to 374.948 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.80192 ( )
beta : -8.18082 ( )
Epeak [keV] : 3.85635 ( )
Norm@50keV : 5.32293E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.41 using 59 PHA bins.
# Reduced chi-squared = 2.7712 for 55 degrees of freedom
# Null hypothesis probability = 4.350058e-11
Photon flux (15-150 keV) in 444.2 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] : 2.95350 (-0.242599 0.2757)
R^2/D10^2 : 40.4488 (-18.9509 35.7234)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.14 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 57 degrees of freedom
# Null hypothesis probability = 1.134919e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.046e-06 5.806e-07
25- 50 4.203e-07 1.066e-07
50-150 5.958e-10 3.967e-10
15-150 3.467e-06 6.010e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.64594 (-0.691782 0.854017)
Norm : 40.2630 (-15.6861 26.1877)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.85 using 59 PHA bins.
# Reduced chi-squared = 1.155 for 57 degrees of freedom
# Null hypothesis probability = 1.973976e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.087e-06 5.115e-07
25- 50 5.076e-07 1.125e-07
50-150 4.692e-09 2.996e-09
15-150 3.599e-06 5.293e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.33283 (-0.239548 0.261782)
R1^2/D10^2 : 170.173 (-18.8836 36.2148)
kT2 [keV] : 5.04200 (-199.363 -199.363)
R2^2/D10^2 : 0.607398 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.62 using 59 PHA bins.
#Fit statistic : Chi-Squared = 64.41 using 59 PHA bins.
# Reduced chi-squared = 1.248 for 55 degrees of freedom
# Reduced chi-squared = 1.171 for 55 degrees of freedom
# Null hypothesis probability = 1.024978e-01
# Null hypothesis probability = 1.804136e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.052e-06 5.428e-07
25- 50 4.261e-07 8.460e-08
50-150 2.704e-07 4.113e-10
15-150 3.748e-06 6.667e-07
Peak spectrum fit
Power-law model
Time interval is from 127.804 sec. to 128.804 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.30268 ( -0.669259 0.914989 )
Norm@50keV : 4.22992E-03 ( -0.00422992 0.00204541 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 1.999689e-01
Photon flux (15-150 keV) in 1 sec: 0.740316 ( -0.252526 0.252788 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04417e-08 ( -1.61606e-08 1.73131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 127.804 sec. to 128.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84210 ( )
Epeak [keV] : 14.6161 ( )
Norm@50keV : 7.72953E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.68 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 56 degrees of freedom
# Null hypothesis probability = 1.765767e-01
Photon flux (15-150 keV) in 1 sec: 0.728569 ( -0.266533 0.260188 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95022e-08 ( -1.6005e-08 1.79247e-08 ) ergs/cm2
Band function
Time interval is from 127.804 sec. to 128.804 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.17216 ( 6.10369 7.17216 )
beta : -2.30268 ( -0.914989 0.67043 )
Epeak [keV] : 59.3718 ( -59.3718 -59.3718 )
Norm@50keV : 0.574905 ( -0.574905 0.278006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 55 degrees of freedom
# Null hypothesis probability = 1.523082e-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] : 10.8195 (-4.22645 4.95212)
R^2/D10^2 : 0.241916 (-0.24083 1.41143)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.85 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.538874e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.896e-09 3.861e-09
25- 50 1.632e-08 1.012e-08
50-150 1.065e-08 7.475e-09
15-150 3.287e-08 2.117e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.9629 (-28.1372 122.072)
Norm : 4.23486 (-1.9879 4.73756)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.78 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 57 degrees of freedom
# Null hypothesis probability = 1.988969e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.025e-08 6.550e-09
25- 50 1.450e-08 8.897e-09
50-150 1.353e-08 1.069e-08
15-150 3.829e-08 2.525e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.06289 (-1.88098 3.79584)
R1^2/D10^2 : 556.969 (-769.067 -770.416)
kT2 [keV] : 12.8784 (-4.44625 7.59042)
R2^2/D10^2 : 0.111219 (-0.0986837 0.388381)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.58 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 55 degrees of freedom
# Null hypothesis probability = 2.000373e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.061e-08 5.230e-09
25- 50 1.355e-08 8.095e-09
50-150 1.391e-08 1.012e-08
15-150 3.807e-08 2.143e-08
Plot creation:
Wed Nov 12 19:20:53 EST 2014