batgrbproduct Analysis for Trigger=680017
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 Mar 22 21:09:36 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger680017/GCN5_download_cron
======================================================================
Trigger: 00680017 Segment: 000
BAT Trigger Time: 480268543.232 [s; MET]
Trigger Stop: 480268551.424 [s; MET]
UTC: 2016-03-21T15:55:27.220500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 99.4143335524643 Dec: 5.71469069735744 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.2
Image Trigger?: NO
Rate S/N Ratio: 13.3041346956501 [ if not an image trigger ]
Image S/N Ratio: 9.2
Flight Position: [ source = BAT ]
RA: 99.4143335524643 Dec: 5.71469069735744 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 99.4197094006799 Dec: 5.75258363263773 [deg; J2000]
{ 06h 37m 40.7s , +05d 45' 09.3" }
+/- 1.62935265542373 [arcmin] (estimated 90% radius based on SNR)
+/- 0.693986501025112 [arcmin] (formal 1-sigma fit error)
SNR: 15.1439677492139
Angular difference between Flight and Ground position is 2.296116 arcmin
Partial Coding Fraction: 0.9609375 [ including projection effects ]
Duration
T90: 33.6039999723434 +/- 4.84319604035154
Measured from: -18.2719998955727
to: 15.3320000767708 [s; relative to TRIGTIME]
T50: 16.9959999322891 +/- 5.29215723533949
Measured from: -9.7519998550415
to: 7.24400007724762 [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: -20.8840000033379
to: 19 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.349492 0.416880 0.195051 0.016880
0.034552 0.036219 0.032219 0.030305 [error]
Peak 0.024017 0.023468 0.013421 -0.001330
0.005460 0.005801 0.005128 0.004746 [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 1.07e-07 1.55e-07 1.68e-07 3.37e-07 5.34e-07 7.67e-07 erg/cm2
Error 1.54e-08 1.61e-08 2.99e-08 1.19e-07 6.91e-08 1.51e-07 erg/cm2
Peak flux Power-law 1.99e-01 1.50e-01 7.61e-02 5.51e-02 4.51e-01 4.80e-01 ph/cm2/s
Error 7.50e-02 4.44e-02 3.94e-02 6.40e-02 1.30e-01 1.45e-01 ph/cm2/s
Fluence Cutoff-PL 1.01e-07 1.72e-07 1.56e-07 7.80e-08 4.82e-07 5.07e-07 erg/cm2
Error 1.70e-08 2.31e-08 3.77e-08 1.49e-07 7.99e-08 1.65e-07 erg/cm2
Peak flux Cutoff-PL 1.97e-01 1.58e-01 7.18e-02 2.59e-02 4.44e-01 4.53e-01 ph/cm2/s
Error 7.66e-02 7.48e-02 5.84e-02 3.55e-02 1.59e-01 1.81e-01 ph/cm2/s
Fluence Band 9.88e-08 1.75e-07 1.50e-07 2.08e-07 5.01e-07 6.34e-07 erg/cm2
Error 1.77e-08 1.82e-08 3.55e-08 -------- -------- -------- erg/cm2
Peak flux Band 1.33e-01 1.07e-01 5.21e-02 2.53e-02 3.06e-01 3.18e-01 ph/cm2/s
Error -------- -------- -------- -------- 1.31e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.890 0.192 - - 1.46e-03 1.89e-04 49.880 57
CPL 1.012 0.942 45.2 36.8 4.81e-03 1.05e-02 46.500 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.984 0.567 - - 3.03e-03 1.20e-03 68.480 57
CPL -9.434 0.000 26.7 0.0 6.30e+05 0.00e+00 68.110 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 39.884 -20.884 19.000
T90 33.604 -18.272 15.332
T50 16.996 -9.752 7.244
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
99.4197 +5.7526 0.0127 17.2 -141.8 1.0937 15.1 TRIG_00680017
------------------------------------------
Foreground time interval of the image:
-20.884 19.000 (delta_t = 39.884 [sec])
Background time interval of the image:
-239.232 -20.884 (delta_t = 218.348 [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 -20.884 sec. to 19.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.89024 ( -0.187263 0.19659 )
Norm@50keV : 1.45677E-03 ( -0.000191328 0.000187609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.88 using 59 PHA bins.
# Reduced chi-squared = 0.8751 for 57 degrees of freedom
# Null hypothesis probability = 7.367580e-01
Photon flux (15-150 keV) in 39.88 sec: 0.208201 ( -0.0214349 0.021435 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.34081e-07 ( -6.81761e-08 7.0046e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.884 sec. to 19.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.01216 ( -1.06433 0.820238 )
Epeak [keV] : 45.2441 ( -11.1911 62.4695 )
Norm@50keV : 4.81182E-03 ( -0.00481223 0.016232 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.50 using 59 PHA bins.
# Reduced chi-squared = 0.8304 for 56 degrees of freedom
# Null hypothesis probability = 8.131851e-01
Photon flux (15-150 keV) in 39.88 sec: 0.201305 ( -0.022188 0.022288 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81583e-07 ( -7.62865e-08 8.3425e-08 ) ergs/cm2
Band function
Time interval is from -20.884 sec. to 19.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.01210 ( -0.476281 1.05036 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 45.2356 ( -11.1893 62.1742 )
Norm@50keV : 4.81185E-03 ( -0.00307464 0.0163203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.50 using 59 PHA bins.
# Reduced chi-squared = 0.8455 for 55 degrees of freedom
# Null hypothesis probability = 7.856738e-01
Photon flux (15-150 keV) in 39.88 sec: 0.201912 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.00761e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.84625 (-1.1125 1.28819)
R^2/D10^2 : 0.104698 (-0.0390559 0.0604996)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.435366e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.199e-08 1.525e-08
25- 50 1.994e-07 2.937e-08
50-150 9.949e-08 2.724e-08
15-150 3.809e-07 5.141e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.5409 (-21.8036 38.2492)
Norm : 1.00549 (-0.149669 0.184508)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.77 using 59 PHA bins.
# Reduced chi-squared = 0.8205 for 57 degrees of freedom
# Null hypothesis probability = 8.312393e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.035e-07 1.438e-08
25- 50 1.674e-07 1.906e-08
50-150 2.251e-07 9.238e-08
15-150 4.960e-07 8.600e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.81076 (-2.15631 1.8882)
R1^2/D10^2 : 0.304065 (-0.162195 0.68774)
kT2 [keV] : 21.2476 (-7.82565 25.4697)
R2^2/D10^2 : 3.46755E-03 (-0.00323707 0.0214422)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.54 using 59 PHA bins.
# Reduced chi-squared = 0.8281 for 55 degrees of freedom
# Null hypothesis probability = 8.144735e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.949e-08 4.700e-08
25- 50 1.747e-07 8.160e-08
50-150 2.217e-07 1.253e-07
15-150 4.958e-07 2.245e-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: 1.98398 ( -0.524355 0.609787 )
Norm@50keV : 3.02842E-03 ( -0.001224 0.00117427 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.48 using 59 PHA bins.
# Reduced chi-squared = 1.201 for 57 degrees of freedom
# Null hypothesis probability = 1.419208e-01
Photon flux (15-150 keV) in 1 sec: 0.450950 ( -0.129556 0.129677 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79058e-08 ( -1.00656e-08 1.10565e-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: -9.43410 ( )
Epeak [keV] : 26.7362 ( )
Norm@50keV : 6.30140E+05 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.11 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 56 degrees of freedom
# Null hypothesis probability = 1.285521e-01
Photon flux (15-150 keV) in 1 sec: 0.444233 0.383711 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.1708e-16 ( 0 0 ) 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 : 5.00000 ( -5 -5 )
beta : -2.81554 ( 2.81399 0.991379 )
Epeak [keV] : 26.4240 ( -13.3307 5.91634 )
Norm@50keV : 409.837 ( -112.399 28492.8 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.76 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 55 degrees of freedom
# Null hypothesis probability = 1.519344e-01
Photon flux (15-150 keV) in 1 sec: 0.306471 0.300695 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.75263e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.31496 (-1.78385 2.65713)
R^2/D10^2 : 0.720882 (-0.720882 1.48348)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.58 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.399911e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.472e-09 3.934e-09
25- 50 9.638e-09 5.990e-09
50-150 1.868e-09 1.527e-09
15-150 1.798e-08 1.044e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.7221 (-33.1404 -56.7221)
Norm : 2.43154 (-0.955068 1.91279)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.38 using 59 PHA bins.
# Reduced chi-squared = 1.200 for 57 degrees of freedom
# Null hypothesis probability = 1.436777e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.052e-09 3.740e-09
25- 50 9.050e-09 5.546e-09
50-150 9.818e-09 7.885e-09
15-150 2.492e-08 1.595e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.37230 (-1.83242 2.35161)
R1^2/D10^2 : 1.10465 (-0.553982 2.98965)
kT2 [keV] : 38.3477 (-38.1146 -38.1154)
R2^2/D10^2 : 1.14010E-03 (-0.0011553 0.0604482)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.43 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Null hypothesis probability = 1.584591e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.689e-09 3.934e-09
25- 50 8.832e-09 5.470e-09
50-150 1.446e-08 9.545e-09
15-150 2.998e-08 1.451e-08
Plot creation:
Tue Mar 22 21:15:01 EDT 2016