batgrbproduct Analysis for Trigger=670800
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 Jan 18 12:32:28 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger670800/GCN5_download_cron
======================================================================
Trigger: 00670800 Segment: 000
BAT Trigger Time: 474731983.36 [s; MET]
Trigger Stop: 474731984.384 [s; MET]
UTC: 2016-01-17T13:59:27.649320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 132.190488716105 Dec: -16.3400348873399 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.06
Image Trigger?: NO
Rate S/N Ratio: 11.4455231422596 [ if not an image trigger ]
Image S/N Ratio: 7.06
Flight Position: [ source = BAT ]
RA: 132.190488716105 Dec: -16.3400348873399 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 132.176285607351 Dec: -16.3468653119552 [deg; J2000]
{ 08h 48m 42.3s , -16d 20' 48.7" }
+/- 1.45826126879486 [arcmin] (estimated 90% radius based on SNR)
+/- 0.468400445577219 [arcmin] (formal 1-sigma fit error)
SNR: 17.7446685905304
Angular difference between Flight and Ground position is 0.914699 arcmin
Partial Coding Fraction: 0.9375 [ including projection effects ]
Duration
T90: 11.2679999470711 +/- 2.4614955105327
Measured from: 0.368000090122223
to: 11.6360000371933 [s; relative to TRIGTIME]
T50: 2.8759999871254 +/- 2.35184014631322
Measured from: 2.04000008106232
to: 4.91600006818771 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.17199999094009
to: 3.17199999094009 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0199999809265137
to: 14.055999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.325035 0.278081 0.117563 0.006471
0.024768 0.025159 0.020900 0.017777 [error]
Peak 0.085902 0.087159 0.036298 0.007327
0.007563 0.007834 0.006087 0.004574 [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 9.57e-08 1.09e-07 8.88e-08 1.21e-07 3.38e-07 4.15e-07 erg/cm2
Error 1.25e-08 1.15e-08 1.85e-08 4.84e-08 4.20e-08 7.20e-08 erg/cm2
Peak flux Power-law 7.98e-01 5.84e-01 2.84e-01 1.96e-01 1.76e+00 1.86e+00 ph/cm2/s
Error 1.14e-01 5.92e-02 4.84e-02 6.27e-02 1.78e-01 1.89e-01 ph/cm2/s
Fluence Cutoff-PL 9.42e-08 1.13e-07 8.44e-08 5.80e-08 3.23e-07 3.50e-07 erg/cm2
Error 1.31e-08 1.52e-08 2.29e-08 7.14e-08 5.12e-08 1.02e-07 erg/cm2
Peak flux Cutoff-PL 7.65e-01 6.28e-01 2.76e-01 8.23e-02 1.73e+00 1.75e+00 ph/cm2/s
Error 1.25e-01 8.79e-02 5.96e-02 8.30e-02 1.82e-01 2.21e-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 2.294 0.211 - - 2.52e-03 3.80e-04 51.230 57
CPL 1.970 0.000 3.4 0.0 4.01e-03 0.00e+00 50.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.041 0.188 - - 1.15e-02 1.49e-03 67.610 57
CPL 1.446 0.915 37.0 0.0 2.61e-02 0.00e+00 66.190 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: 0.640000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 14.036 0.020 14.056
T90 11.268 0.368 11.636
T50 2.876 2.040 4.916
Peak 1.000 2.172 3.172
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
132.1763 -16.3469 0.0108 12.3 124.4 0.6727 17.7 TRIG_00670800
------------------------------------------
Foreground time interval of the image:
0.020 9.141 (delta_t = 9.121 [sec])
Background time interval of the image:
-239.360 0.020 (delta_t = 239.380 [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 0.020 sec. to 14.056 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.29398 ( -0.203349 0.218549 )
Norm@50keV : 2.51924E-03 ( -0.000383609 0.000376857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.23 using 59 PHA bins.
# Reduced chi-squared = 0.8987 for 57 degrees of freedom
# Null hypothesis probability = 6.904574e-01
Photon flux (15-150 keV) in 14.04 sec: 0.438790 ( -0.0430789 0.0430793 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37631e-07 ( -4.13941e-08 4.2649e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.020 sec. to 14.056 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96994 ( )
Epeak [keV] : 3.43122 ( )
Norm@50keV : 4.01081E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.69 using 59 PHA bins.
# Reduced chi-squared = 0.9053 for 56 degrees of freedom
# Null hypothesis probability = 6.752802e-01
Photon flux (15-150 keV) in 14.04 sec: 0.432991 ( -0.04488 0.045 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23319e-07 ( -4.97929e-08 5.25545e-08 ) ergs/cm2
Band function
Time interval is from 0.020 sec. to 14.056 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.11803 ( 1.0055 1.0055 )
beta : -2.48149 ( 2.50411 0.357727 )
Epeak [keV] : 21.6703 ( -22.3487 8.36538 )
Norm@50keV : 1.67566E-02 ( -0.023724 803.082 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.91 using 59 PHA bins.
# Reduced chi-squared = 0.9075 for 55 degrees of freedom
# Null hypothesis probability = 6.687746e-01
Photon flux (15-150 keV) in 14.04 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] : 7.64458 (-0.867592 0.985217)
R^2/D10^2 : 0.565786 (-0.220168 0.362425)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.73 using 59 PHA bins.
# Reduced chi-squared = 1.206 for 57 degrees of freedom
# Null hypothesis probability = 1.373081e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.099e-08 1.386e-08
25- 50 1.308e-07 1.926e-08
50-150 2.950e-08 1.012e-08
15-150 2.413e-07 3.201e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 40.3307 (-9.66404 14.6187)
Norm : 2.80363 (-0.527439 0.685429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.79 using 59 PHA bins.
# Reduced chi-squared = 0.9085 for 57 degrees of freedom
# Null hypothesis probability = 6.704632e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.064e-08 1.227e-08
25- 50 1.197e-07 1.490e-08
50-150 9.342e-08 3.210e-08
15-150 3.037e-07 4.254e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.36394 (-1.275 1.25313)
R1^2/D10^2 : 1.90651 (-1.03438 3.50199)
kT2 [keV] : 18.8348 (-6.42287 14.883)
R2^2/D10^2 : 9.45009E-03 (-0.00830336 0.0325281)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.84 using 59 PHA bins.
# Reduced chi-squared = 0.9063 for 55 degrees of freedom
# Null hypothesis probability = 6.713853e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.481e-08 3.873e-08
25- 50 1.105e-07 4.357e-08
50-150 1.192e-07 6.665e-08
15-150 3.245e-07 1.391e-07
Peak spectrum fit
Power-law model
Time interval is from 2.172 sec. to 3.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04066 ( -0.183339 0.193386 )
Norm@50keV : 1.15045E-02 ( -0.00150362 0.00147077 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.61 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 57 degrees of freedom
# Null hypothesis probability = 1.588076e-01
Photon flux (15-150 keV) in 1 sec: 1.75874 ( -0.178075 0.178107 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06358e-07 ( -1.27844e-08 1.30188e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.172 sec. to 3.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.44626 ( -1.14225 0.688149 )
Epeak [keV] : 36.9771 ( )
Norm@50keV : 2.61420E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.19 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 56 degrees of freedom
# Null hypothesis probability = 1.654917e-01
Photon flux (15-150 keV) in 1 sec: 1.72636 ( -0.18104 0.18392 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.96661e-08 ( -1.55613e-08 1.60639e-08 ) ergs/cm2
Band function
Time interval is from 2.172 sec. to 3.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.112920 ( -1.61128 0.0939654 )
beta : -2.40360 ( -0.824881 0.37705 )
Epeak [keV] : 31.1423 ( -9.14252 11.1821 )
Norm@50keV : 0.220507 ( -0.246843 911.484 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Null hypothesis probability = 2.067015e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00652e-07 ( -1.00645e-07 -1.32723e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.00401 (-0.941496 1.06692)
R^2/D10^2 : 1.24529 (-0.445324 0.678714)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.42 using 59 PHA bins.
# Reduced chi-squared = 1.376 for 57 degrees of freedom
# Null hypothesis probability = 3.146348e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.966e-08 3.465e-09
25- 50 4.182e-08 5.485e-09
50-150 1.597e-08 4.720e-09
15-150 7.745e-08 1.065e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.0120 (-15.4042 24.159)
Norm : 9.32736 (-1.53475 1.80143)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.15 using 59 PHA bins.
# Reduced chi-squared = 1.161 for 57 degrees of freedom
# Null hypothesis probability = 1.902841e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.338e-08 3.335e-09
25- 50 3.540e-08 3.945e-09
50-150 3.972e-08 1.087e-08
15-150 9.850e-08 1.360e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.33130 (-1.48818 1.35145)
R1^2/D10^2 : 2.40065 (-0.983705 2.57553)
kT2 [keV] : 34.3469 (-17.8156 -35.7358)
R2^2/D10^2 : 4.47488E-03 (-0.0039915 0.0223727)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.45 using 59 PHA bins.
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.287053e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.245e-08 6.345e-09
25- 50 3.736e-08 1.054e-08
50-150 4.473e-08 2.275e-08
15-150 1.045e-07 3.315e-08
Plot creation:
Mon Jan 18 12:37:09 EST 2016