batgrbproduct Analysis for Trigger=667392
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 Dec 16 02:49:50 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger667392/GCN5_download_cron
======================================================================
Trigger: 00667392 Segment: 000
BAT Trigger Time: 471841304.512 [s; MET]
Trigger Stop: 471841305.024 [s; MET]
UTC: 2015-12-15T03:01:28.957040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 93.5948780255951 Dec: 35.5094452220509 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.38
Image Trigger?: NO
Rate S/N Ratio: 13.4164078649987 [ if not an image trigger ]
Image S/N Ratio: 8.38
Flight Position: [ source = BAT ]
RA: 93.5948780255951 Dec: 35.5094452220509 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 93.6221801039915 Dec: 35.5291573090333 [deg; J2000]
{ 06h 14m 29.3s , +35d 31' 45.0" }
+/- 2.77465100981796 [arcmin] (estimated 90% radius based on SNR)
+/- 1.2410891382952 [arcmin] (formal 1-sigma fit error)
SNR: 7.07886404016671
Angular difference between Flight and Ground position is 1.782283 arcmin
Partial Coding Fraction: 0.515625 [ including projection effects ]
Duration
T90: 17.8479999899864 +/- 1.00345011433835
Measured from: -15.0799999237061
to: 2.76800006628036 [s; relative to TRIGTIME]
T50: 14.227999985218 +/- 12.6568040487343
Measured from: -12.7879999279976
to: 1.44000005722046 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.164000034332275
to: 0.835999965667725 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.460000038147
to: 3.12799996137619 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.234377 0.214781 0.109414 0.022240
0.035331 0.036591 0.031903 0.026485 [error]
Peak 0.038058 0.087738 0.067300 0.008601
0.008975 0.009910 0.009064 0.006775 [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 6.78e-08 9.26e-08 9.34e-08 1.71e-07 3.09e-07 4.24e-07 erg/cm2
Error 1.61e-08 1.70e-08 2.94e-08 1.05e-07 6.89e-08 1.40e-07 erg/cm2
Peak flux Power-law 4.98e-01 5.24e-01 3.90e-01 4.70e-01 1.59e+00 1.88e+00 ph/cm2/s
Error 1.13e-01 7.99e-02 6.84e-02 1.56e-01 2.33e-01 2.80e-01 ph/cm2/s
Fluence Cutoff-PL 6.51e-08 1.03e-07 8.54e-08 3.74e-08 2.80e-07 2.91e-07 erg/cm2
Error 1.72e-08 2.40e-08 4.00e-08 1.28e-07 7.75e-08 1.63e-07 erg/cm2
Peak flux Cutoff-PL 3.61e-01 6.28e-01 4.56e-01 1.10e-01 1.54e+00 1.56e+00 ph/cm2/s
Error 1.32e-01 1.06e-01 8.89e-02 9.74e-02 2.34e-01 2.49e-01 ph/cm2/s
Fluence Band 6.76e-08 1.03e-07 8.05e-08 1.03e-07 2.91e-07 3.55e-07 erg/cm2
Error 1.81e-08 2.18e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 3.61e-01 6.28e-01 4.56e-01 1.10e-01 1.54e+00 1.56e+00 ph/cm2/s
Error 1.26e-01 1.03e-01 8.46e-02 -------- 2.32e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.988 0.328 - - 1.80e-03 4.20e-04 69.130 57
CPL 1.113 1.622 39.2 0.0 6.16e-03 0.00e+00 67.870 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.426 0.216 - - 1.30e-02 1.92e-03 65.450 57
CPL -0.444 1.232 65.3 18.0 1.15e-01 2.75e-01 55.140 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: 1.152000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.588 -15.460 3.128
T90 17.848 -15.080 2.768
T50 14.228 -12.788 1.440
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
93.6222 +35.5292 0.0271 28.6 47.7 0.5447 7.1 TRIG_00667392
------------------------------------------
Foreground time interval of the image:
-15.460 3.128 (delta_t = 18.588 [sec])
Background time interval of the image:
-60.111 -15.460 (delta_t = 44.651 [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 -15.460 sec. to 3.128 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98816 ( -0.312442 0.343583 )
Norm@50keV : 1.80175E-03 ( -0.000427056 0.000413699 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.13 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.300976e-01
Photon flux (15-150 keV) in 18.59 sec: 0.268802 ( -0.0481861 0.0481866 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08702e-07 ( -6.74486e-08 7.03141e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.460 sec. to 3.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11345 ( -2.05655 1.18806 )
Epeak [keV] : 39.1708 ( )
Norm@50keV : 6.16378E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.87 using 59 PHA bins.
# Reduced chi-squared = 1.212 for 56 degrees of freedom
# Null hypothesis probability = 1.328623e-01
Photon flux (15-150 keV) in 18.59 sec: 0.262641 ( -0.048691 0.048983 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79878e-07 ( -7.30345e-08 8.19577e-08 ) ergs/cm2
Band function
Time interval is from -15.460 sec. to 3.128 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94551 ( -6.52009 -4.94551 )
beta : -2.36182 ( -0.727973 0.459184 )
Epeak [keV] : 24.8314 ( -6.25629 4.78697 )
Norm@50keV : 303.308 ( -53.2207 1852.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.46 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.579103e-01
Photon flux (15-150 keV) in 18.59 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.91268e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.68828 (-1.64961 2.17892)
R^2/D10^2 : 0.219233 (-0.126943 0.278305)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.00 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 57 degrees of freedom
# Null hypothesis probability = 8.706263e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.875e-08 1.857e-08
25- 50 1.181e-07 3.496e-08
50-150 4.039e-08 1.937e-08
15-150 2.172e-07 7.045e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 61.7670 (-25.223 59.4311)
Norm : 1.40647 (-0.361657 0.503237)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.89 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.531334e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.601e-08 1.515e-08
25- 50 1.014e-07 2.813e-08
50-150 1.181e-07 6.752e-08
15-150 2.855e-07 8.945e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.35528 (-2.07872 2.32283)
R1^2/D10^2 : 0.571248 (-0.380629 1.69217)
kT2 [keV] : 21.9339 (-17.5227 108.157)
R2^2/D10^2 : 3.70528E-03 (-0.00378867 0.0466791)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.04 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 55 degrees of freedom
# Null hypothesis probability = 1.463892e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.776e-08 3.963e-08
25- 50 1.019e-07 5.518e-08
50-150 1.245e-07 8.121e-08
15-150 2.942e-07 1.583e-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: 1.42596 ( -0.214175 0.216958 )
Norm@50keV : 1.29973E-02 ( -0.00191919 0.00191228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.45 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 57 degrees of freedom
# Null hypothesis probability = 2.068789e-01
Photon flux (15-150 keV) in 1 sec: 1.59241 ( -0.232463 0.232762 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24936e-07 ( -1.99502e-08 2.01723e-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: -0.443619 ( -1.39358 1.07034 )
Epeak [keV] : 65.3316 ( -11.3909 24.6596 )
Norm@50keV : 0.115076 ( -0.115076 0.435023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 0.9846 for 56 degrees of freedom
# Null hypothesis probability = 5.075519e-01
Photon flux (15-150 keV) in 1 sec: 1.53563 ( -0.2341 0.23487 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15334e-07 ( -1.99583e-08 2.0782e-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 : 0.444061 ( -0.792398 1.38227 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 65.3164 ( -10.4016 24.6613 )
Norm@50keV : 0.115158 ( -0.115158 0.436166 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.14 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 55 degrees of freedom
# Null hypothesis probability = 4.694789e-01
Photon flux (15-150 keV) in 1 sec: 1.53568 ( 5.46432 -0.23376 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15341e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4826 (-2.0825 2.43431)
R^2/D10^2 : 0.182917 (-0.0740504 0.119326)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.75 using 59 PHA bins.
# Reduced chi-squared = 0.9957 for 57 degrees of freedom
# Null hypothesis probability = 4.842736e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.128e-09 2.250e-09
25- 50 3.732e-08 8.490e-09
50-150 6.173e-08 1.825e-08
15-150 1.082e-07 2.273e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-76.3201 -199.362)
Norm : 6.65122 (-0.951428 0.952704)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.02 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.718906e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.656e-08 9.380e-09
25- 50 3.186e-08 1.782e-08
50-150 6.987e-08 3.969e-08
15-150 1.183e-07 6.520e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.06646 (-7.16147 -7.16147)
R1^2/D10^2 : 0.764207 (-0.757697 -0.757697)
kT2 [keV] : 18.3005 (-4.05782 -18.3495)
R2^2/D10^2 : 8.67470E-02 (-0.0860768 0.152076)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 55 degrees of freedom
# Null hypothesis probability = 4.828256e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.198e-08 6.860e-09
25- 50 3.572e-08 1.915e-08
50-150 6.760e-08 3.829e-08
15-150 1.153e-07 5.940e-08
Plot creation:
Wed Dec 16 02:55:38 EST 2015