batgrbproduct Analysis for Trigger=669319
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): Tue Jan 5 13:34:47 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger669319/GCN5_download_cron
======================================================================
Trigger: 00669319 Segment: 000
BAT Trigger Time: 473599466.496 [s; MET]
Trigger Stop: 473599467.52 [s; MET]
UTC: 2016-01-04T11:24:10.846420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 76.8038165818516 Dec: 11.3540862276317 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.69
Image Trigger?: NO
Rate S/N Ratio: 15.7162336455017 [ if not an image trigger ]
Image S/N Ratio: 8.69
Flight Position: [ source = BAT ]
RA: 76.8038165818516 Dec: 11.3540862276317 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 76.8077992306578 Dec: 11.3335068546747 [deg; J2000]
{ 05h 07m 13.9s , +11d 20' 00.6" }
+/- 1.66516505506603 [arcmin] (estimated 90% radius based on SNR)
+/- 0.581474323670543 [arcmin] (formal 1-sigma fit error)
SNR: 14.6808372895094
Angular difference between Flight and Ground position is 1.256794 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 13.811999976635 +/- 2.46732650047342
Measured from: -0.939999878406525
to: 12.8720000982285 [s; relative to TRIGTIME]
T50: 9.81599998474121 +/- 4.09995953679261
Measured from: 0.820000112056732
to: 10.6360000967979 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.163999974727631
to: 0.836000025272369 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.31199997663498
to: 17.6480000019073 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.250178 0.308081 0.168464 0.015127
0.027399 0.028541 0.024137 0.020357 [error]
Peak 0.034378 0.057688 0.035026 0.007783
0.006720 0.007213 0.006286 0.004777 [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 7.15e-08 1.12e-07 1.32e-07 3.03e-07 4.04e-07 6.19e-07 erg/cm2
Error 1.12e-08 1.20e-08 2.25e-08 1.03e-07 5.28e-08 1.26e-07 erg/cm2
Peak flux Power-law 3.31e-01 3.37e-01 2.41e-01 2.76e-01 1.02e+00 1.18e+00 ph/cm2/s
Error 8.06e-02 5.33e-02 4.91e-02 1.11e-01 1.56e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 6.66e-08 1.23e-07 1.31e-07 9.53e-08 3.76e-07 4.16e-07 erg/cm2
Error 1.25e-08 1.63e-08 2.57e-08 1.48e-07 5.83e-08 1.46e-07 erg/cm2
Peak flux Cutoff-PL 2.99e-01 3.70e-01 2.50e-01 1.07e-01 9.91e-01 1.03e+00 ph/cm2/s
Error 9.13e-02 7.14e-02 5.65e-02 1.67e-01 1.60e-01 1.60e-01 ph/cm2/s
Fluence Band 6.59e-08 1.23e-07 1.27e-07 1.66e-07 3.79e-07 4.83e-07 erg/cm2
Error 1.30e-08 1.88e-08 2.87e-08 -------- -------- 1.22e-07 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 1.760 0.190 - - 2.31e-03 2.90e-04 61.390 57
CPL 1.024 0.806 57.7 152.9 6.01e-03 8.46e-03 58.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.482 0.255 - - 8.19e-03 1.32e-03 55.410 57
CPL 0.667 1.162 75.3 -26.2 2.27e-02 6.60e-02 53.680 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: 5.504000 sec.
T50 in the 50-300 keV band: 2.240000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.960 -1.312 17.648
T90 13.812 -0.940 12.872
T50 9.816 0.820 10.636
Peak 1.000 -0.164 0.836
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
76.8078 +11.3335 0.0131 6.2 -63.8 0.7555 14.7 TRIG_00669319
------------------------------------------
Foreground time interval of the image:
-1.312 17.648 (delta_t = 18.960 [sec])
Background time interval of the image:
-239.496 -1.312 (delta_t = 238.184 [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 -1.312 sec. to 17.648 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76028 ( -0.186649 0.194061 )
Norm@50keV : 2.31159E-03 ( -0.000292514 0.000287228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.39 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.215024e-01
Photon flux (15-150 keV) in 18.96 sec: 0.313759 ( -0.0337781 0.033783 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.04189e-07 ( -5.22416e-08 5.33254e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.312 sec. to 17.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.02422 ( -0.897508 0.715133 )
Epeak [keV] : 57.6715 ( -14.6484 291.173 )
Norm@50keV : 6.00652E-03 ( -0.00360677 0.0133181 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 56 degrees of freedom
# Null hypothesis probability = 3.883695e-01
Photon flux (15-150 keV) in 18.96 sec: 0.305762 ( -0.034585 0.034613 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.76022e-07 ( -5.69445e-08 5.95647e-08 ) ergs/cm2
Band function
Time interval is from -1.312 sec. to 17.648 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.02416 ( -0.43921 1.01913 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 57.6608 ( -14.5744 284.603 )
Norm@50keV : 6.00654E-03 ( -0.0036073 0.0133211 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.061 for 55 degrees of freedom
# Null hypothesis probability = 3.526548e-01
Photon flux (15-150 keV) in 18.96 sec: 0.310285 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.79014e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.2340 (-1.40747 1.65614)
R^2/D10^2 : 9.77643E-02 (-0.0389818 0.0627757)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.16 using 59 PHA bins.
# Reduced chi-squared = 1.283 for 57 degrees of freedom
# Null hypothesis probability = 7.336252e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.907e-08 9.480e-09
25- 50 1.425e-07 2.138e-08
50-150 1.032e-07 2.640e-08
15-150 2.948e-07 4.323e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8927 (-31.5338 69.1213)
Norm : 1.39744 (-0.195238 0.225952)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.69 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.133840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.925e-08 1.060e-08
25- 50 1.197e-07 1.683e-08
50-150 1.939e-07 9.226e-08
15-150 3.829e-07 9.158e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.45039 (-2.00838 2.1687)
R1^2/D10^2 : 0.487979 (-0.294772 1.27689)
kT2 [keV] : 20.9199 (-5.96404 12.8395)
R2^2/D10^2 : 7.00414E-03 (-0.0058638 0.0206121)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.37 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.875380e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.735e-08 3.480e-08
25- 50 1.219e-07 5.970e-08
50-150 1.919e-07 1.072e-07
15-150 3.812e-07 1.959e-07
Peak spectrum fit
Power-law model
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.48195 ( -0.25256 0.258251 )
Norm@50keV : 8.18576E-03 ( -0.0013326 0.00131627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 0.9721 for 57 degrees of freedom
# Null hypothesis probability = 5.348555e-01
Photon flux (15-150 keV) in 1 sec: 1.01702 ( -0.156249 0.156305 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.789e-08 ( -1.38703e-08 1.41564e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.666961 ( -1.39478 0.928792 )
Epeak [keV] : 75.3413 ( -22.9235 -75.3421 )
Norm@50keV : 2.26723E-02 ( -0.0226719 0.109333 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.68 using 59 PHA bins.
# Reduced chi-squared = 0.9585 for 56 degrees of freedom
# Null hypothesis probability = 5.633130e-01
Photon flux (15-150 keV) in 1 sec: 0.990916 ( -0.160283 0.160104 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.22127e-08 ( -1.55723e-08 1.60107e-08 ) ergs/cm2
Band function
Time interval is from -0.164 sec. to 0.836 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.89571 ( -5.9342 -4.89571 )
beta : -1.77382 ( -0.5433 0.348359 )
Epeak [keV] : 29.9110 ( -11.226 6.74413 )
Norm@50keV : 262.931 ( -39.6898 3459.12 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.22 using 59 PHA bins.
# Reduced chi-squared = 0.9494 for 55 degrees of freedom
# Null hypothesis probability = 5.816671e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.46253e-08 ( -7.46183e-08 -1.42535e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.2404 (-2.27366 2.89512)
R^2/D10^2 : 0.184424 (-0.0927426 0.174192)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.34 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.904430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.854e-09 2.002e-09
25- 50 2.407e-08 5.750e-09
50-150 2.696e-08 8.540e-09
15-150 5.789e-08 1.251e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-97.3573 -199.363)
Norm : 4.18134 (-0.637291 0.637375)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.47 using 59 PHA bins.
# Reduced chi-squared = 0.9557 for 57 degrees of freedom
# Null hypothesis probability = 5.704588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.041e-08 5.945e-09
25- 50 2.003e-08 1.117e-08
50-150 4.393e-08 2.459e-08
15-150 7.437e-08 4.146e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.24795 (-3.62403 3.8711)
R1^2/D10^2 : 0.631818 (-0.353265 1.68507)
kT2 [keV] : 26.3335 (-14.3837 -30.999)
R2^2/D10^2 : 1.01634E-02 (-0.00576428 0.0614114)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.55 using 59 PHA bins.
# Reduced chi-squared = 0.9555 for 55 degrees of freedom
# Null hypothesis probability = 5.687969e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.133e-09 5.400e-09
25- 50 2.158e-08 1.177e-08
50-150 3.955e-08 2.346e-08
15-150 7.026e-08 3.746e-08
Plot creation:
Tue Jan 5 13:39:14 EST 2016