batgrbproduct Analysis for Trigger=618134
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 10:06:08 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger618134/GCN5_download_cron
======================================================================
Trigger: 00618134 Segment: 000
BAT Trigger Time: 437283848 [s; MET]
Trigger Stop: 437283912 [s; MET]
UTC: 2014-11-10T03:43:55.232260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 135.603777938225 Dec: -40.3467837768642 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.87
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.87
Flight Position: [ source = BAT ]
RA: 135.603777938225 Dec: -40.3467837768642 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 135.595558841166 Dec: -40.4483807217399 [deg; J2000]
{ 09h 02m 22.9s , -40d 26' 54.2" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.10502046620465 [arcmin] (formal 1-sigma fit error)
SNR: -8.70931041810645
Angular difference between Flight and Ground position is 6.107375 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: 53.1840000152588 +/- 7.93064334482733
Measured from: 44.7040001153946
to: 97.8880001306534 [s; relative to TRIGTIME]
T50: 25.3440000414848 +/- 10.0651064131196
Measured from: 57.0560001134872
to: 82.4000001549721 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 61.4520000219345
to: 62.4520000219345 [s; relative to TRIGTIME]
Total Fluence
Measured from: 41.3759999871254
to: 99.2960000038147 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.123746 0.145661 -0.065341 0.006621
0.044595 0.044860 0.037639 0.032299 [error]
Peak 0.014298 0.008926 0.010057 0.004048
0.005832 0.005893 0.005108 0.004299 [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 4.58e-08 2.82e-08 1.12e-08 5.97e-09 8.83e-08 9.14e-08 erg/cm2
Error 1.92e-08 2.10e-08 1.73e-08 2.15e-08 5.37e-08 6.42e-08 erg/cm2
Peak flux Power-law 1.16e-01 8.03e-02 3.64e-02 2.30e-02 2.44e-01 2.56e-01 ph/cm2/s
Error 8.14e-02 6.33e-02 3.88e-02 5.22e-02 1.36e-01 1.47e-01 ph/cm2/s
Fluence Cutoff-PL 4.77e-08 3.60e-08 4.77e-09 4.59e-11 8.79e-08 8.81e-08 erg/cm2
Error 2.15e-08 2.97e-08 -------- 5.00e-09 4.52e-08 5.24e-08 erg/cm2
Peak flux Cutoff-PL 1.12e-01 8.61e-02 3.63e-02 1.12e-02 2.42e-01 2.45e-01 ph/cm2/s
Error 1.00e-01 6.39e-02 4.09e-02 5.14e-02 1.36e-01 1.47e-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 3.332 1.432 - - 1.07e-04 1.26e-04 51.090 57
CPL 0.870 0.000 13.6 0.0 5.95e-03 0.00e+00 50.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.141 1.448 - - 1.52e-03 1.24e-03 48.820 57
CPL 1.569 0.000 32.2 0.0 3.21e-03 0.00e+00 48.780 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 57.920 41.376 99.296
T90 53.184 44.704 97.888
T50 25.344 57.056 82.400
Peak 1.000 61.452 62.452
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
135.5956 -40.4484 0.0221 19.2 176.3 -0.6233 -8.7 TRIG_00618134
------------------------------------------
Foreground time interval of the image:
41.376 73.501 (delta_t = 32.125 [sec])
Background time interval of the image:
-18.499 41.376 (delta_t = 59.875 [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 41.376 sec. to 99.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.33179 ( -0.994242 1.86992 )
Norm@50keV : 1.07082E-04 ( -0.000106793 0.000145506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.09 using 59 PHA bins.
# Reduced chi-squared = 0.8963 for 57 degrees of freedom
# Null hypothesis probability = 6.953611e-01
Photon flux (15-150 keV) in 57.92 sec: 3.78435E-02 ( -0.0168574 0.017264 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.82585e-08 ( -4.73358e-08 6.01268e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.376 sec. to 99.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.870416 ( )
Epeak [keV] : 13.6061 ( )
Norm@50keV : 5.94684E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.24 using 59 PHA bins.
# Reduced chi-squared = 0.8971 for 56 degrees of freedom
# Null hypothesis probability = 6.916828e-01
Photon flux (15-150 keV) in 57.92 sec: 3.97196E-02 ( -0.0165302 0.0165334 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.78531e-08 ( -4.19125e-08 4.84906e-08 ) ergs/cm2
Band function
Time interval is from 41.376 sec. to 99.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.976004 ( -6.95603 0.943279 )
beta : -9.37167 ( 9.37167 19.371 )
Epeak [keV] : 12.9442 ( -10.5505 16.4302 )
Norm@50keV : 4.97783E-03 ( -0.00611701 609711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.25 using 59 PHA bins.
# Reduced chi-squared = 0.9137 for 55 degrees of freedom
# Null hypothesis probability = 6.563149e-01
Photon flux (15-150 keV) in 57.92 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] : 5.63471 (-2.44313 2.48385)
R^2/D10^2 : 0.206817 (-0.206817 2.79436)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.43 using 59 PHA bins.
# Reduced chi-squared = 0.8847 for 57 degrees of freedom
# Null hypothesis probability = 7.183864e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.591e-08 2.720e-08
25- 50 3.981e-08 2.710e-08
50-150 2.798e-09 2.832e-09
15-150 8.852e-08 5.809e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.3161 (-8.9944 19.6453)
Norm : 0.692050 (-0.43991 2.51916)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.32 using 59 PHA bins.
# Reduced chi-squared = 0.8827 for 57 degrees of freedom
# Null hypothesis probability = 7.221556e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.771e-08 2.948e-08
25- 50 3.319e-08 2.228e-08
50-150 6.098e-09 7.060e-09
15-150 8.700e-08 5.917e-08
Double BB
R1^2/D10^2 : 94.7827 ( )
kT2 [keV] : 6.52625 (-2.75975 -6.44598)
R2^2/D10^2 : 9.21429E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.53 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.50 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.47 using 59 PHA bins.
# Reduced chi-squared = 0.9006 for 55 degrees of freedom
# Reduced chi-squared = 0.8999 for 55 degrees of freedom
# Reduced chi-squared = 0.8995 for 55 degrees of freedom
# Null hypothesis probability = 6.827609e-01
# Null hypothesis probability = 6.841413e-01
# Null hypothesis probability = 6.850198e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.538e-08 2.319e-08
25- 50 3.960e-08 2.474e-08
50-150 5.297e-09 3.718e-09
15-150 9.029e-08 5.780e-08
Peak spectrum fit
Power-law model
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14090 ( -1.04914 1.84705 )
Norm@50keV : 1.51988E-03 ( -0.00127559 0.00119772 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.82 using 59 PHA bins.
# Reduced chi-squared = 0.8565 for 57 degrees of freedom
# Null hypothesis probability = 7.711496e-01
Photon flux (15-150 keV) in 1 sec: 0.244059 ( -0.135933 0.136142 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41827e-08 ( -9.50236e-09 1.11223e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56859 ( )
Epeak [keV] : 32.1650 ( )
Norm@50keV : 3.21085E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.78 using 59 PHA bins.
# Reduced chi-squared = 0.8710 for 56 degrees of freedom
# Null hypothesis probability = 7.423129e-01
Photon flux (15-150 keV) in 1 sec: 0.241695 ( -0.134844 0.136993 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36364e-08 ( -8.99106e-09 9.0283e-09 ) ergs/cm2
Band function
Time interval is from 61.452 sec. to 62.452 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -2.19863 ( -3.06902 1.08525 )
Epeak [keV] : 16.7397 ( -16.3074 31.3098 )
Norm@50keV : 4317.19 ( -2367.39 1.09809e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.76 using 59 PHA bins.
# Reduced chi-squared = 0.8865 for 55 degrees of freedom
# Null hypothesis probability = 7.105596e-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] : 10.4812 (-10.4864 9.85815)
R^2/D10^2 : 9.77978E-02 (-0.0975889 9.75267)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.49 using 59 PHA bins.
# Reduced chi-squared = 0.8683 for 57 degrees of freedom
# Null hypothesis probability = 7.495905e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.220e-09 1.554e-09
25- 50 5.889e-09 4.032e-09
50-150 3.516e-09 3.038e-09
15-150 1.162e-08 8.580e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.1853 (-54.1853 -54.1853)
Norm : 1.34354 (-0.743209 0.75669)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.79 using 59 PHA bins.
# Reduced chi-squared = 0.8560 for 57 degrees of freedom
# Null hypothesis probability = 7.721169e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.342e-09 2.553e-09
25- 50 4.934e-09 4.431e-09
50-150 5.157e-09 9.360e-09
15-150 1.343e-08 1.580e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.74908 (-2.64534 14.9406)
R1^2/D10^2 : 20.3941 (-22.1194 -22.1194)
kT2 [keV] : 13.2111 (-7.06427 -13.2032)
R2^2/D10^2 : 3.44052E-02 (-0.0344206 0.604295)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.99 using 59 PHA bins.
# Reduced chi-squared = 0.8725 for 55 degrees of freedom
# Null hypothesis probability = 7.372822e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.443e-09 1.664e-09
25- 50 4.692e-09 3.146e-09
50-150 4.969e-09 4.113e-09
15-150 1.310e-08 8.210e-09
Plot creation:
Mon Nov 10 10:08:28 EST 2014