batgrbproduct Analysis for Trigger=722642
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 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Fri Nov 18 17:30:46 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger722642/GCN5_download_cron
======================================================================
Trigger: 00722642 Segment: 000
BAT Trigger Time: 501069000.896 [s; MET]
Trigger Stop: 501069001.92 [s; MET]
UTC: 2016-11-17T09:49:43.723760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 298.855450845301 Dec: -67.7066746073387 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.7
Image Trigger?: NO
Rate S/N Ratio: 22.293496809608 [ if not an image trigger ]
Image S/N Ratio: 10.7
Flight Position: [ source = BAT ]
RA: 298.855450845301 Dec: -67.7066746073387 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 298.829596383926 Dec: -67.6810702256895 [deg; J2000]
{ 19h 55m 19.1s , -67d 40' 51.9" }
+/- 1.52752353571841 [arcmin] (estimated 90% radius based on SNR)
+/- 0.590658050811757 [arcmin] (formal 1-sigma fit error)
SNR: 16.606515221008
Angular difference between Flight and Ground position is 1.645229 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 152.507999956608 +/- 3.36858427459504
Measured from: -1.28399991989136
to: 151.224000036716 [s; relative to TRIGTIME]
T50: 34.9479999542236 +/- 0.932857993072994
Measured from: 101.180000066757
to: 136.128000020981 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 133.803999960423
to: 134.803999960423 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.31600004434586
to: 157.443999946117 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.582255 4.753480 2.338403 0.269369
0.089860 0.093336 0.080183 0.069857 [error]
Peak 0.250512 0.279589 0.107483 0.007761
0.009234 0.009866 0.007075 0.004845 [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 1.63e-06 2.03e-06 1.83e-06 2.88e-06 6.48e-06 8.37e-06 erg/cm2
Error 8.18e-08 5.91e-08 8.28e-08 2.77e-07 1.92e-07 3.45e-07 erg/cm2
Peak flux Power-law 3.02e+00 1.95e+00 8.10e-01 4.60e-01 6.01e+00 6.24e+00 ph/cm2/s
Error 2.09e-01 9.04e-02 5.86e-02 6.26e-02 2.93e-01 2.95e-01 ph/cm2/s
Fluence Cutoff-PL 1.43e-06 2.14e-06 1.82e-06 1.07e-06 6.04e-06 6.46e-06 erg/cm2
Error 1.04e-07 7.11e-08 9.17e-08 3.46e-07 2.39e-07 4.34e-07 erg/cm2
Peak flux Cutoff-PL 2.56e+00 2.22e+00 7.95e-01 1.08e-01 5.66e+00 5.68e+00 ph/cm2/s
Error 2.49e-01 1.25e-01 7.33e-02 5.10e-02 3.10e-01 3.15e-01 ph/cm2/s
Fluence Band 1.41e-06 2.13e-06 1.81e-06 1.49e-06 6.04e-06 6.86e-06 erg/cm2
Error 1.07e-07 7.38e-08 1.02e-07 -------- -------- -------- erg/cm2
Peak flux Band 2.48e+00 2.27e+00 7.58e-01 2.15e-01 5.64e+00 5.72e+00 ph/cm2/s
Error 2.65e-01 1.34e-01 7.43e-02 9.91e-02 3.10e-01 3.22e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.144 0.059 - - 4.19e-03 1.35e-04 64.260 57
CPL 1.394 0.280 37.5 5.6 1.02e-02 3.48e-03 39.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.264 0.084 - - 3.51e-02 1.95e-03 89.850 57
CPL 0.865 0.479 34.3 4.1 2.17e-01 1.51e-01 54.530 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: 150.528000 sec.
T50 in the 50-300 keV band: 40.704000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 165.760 -8.316 157.444
T90 152.508 -1.284 151.224
T50 34.948 101.180 136.128
Peak 1.000 133.804 134.804
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
298.8296 -67.6811 0.0116 29.8 -70.0 1.4139 16.6 TRIG_00722642
------------------------------------------
Foreground time interval of the image:
-8.316 11.305 (delta_t = 19.621 [sec])
Background time interval of the image:
-239.896 -8.316 (delta_t = 231.580 [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 -8.316 sec. to 157.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.14364 ( -0.0587373 0.0593981 )
Norm@50keV : 4.18610E-03 ( -0.000135044 0.000134415 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.26 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 57 degrees of freedom
# Null hypothesis probability = 2.372807e-01
Photon flux (15-150 keV) in 165.8 sec: 0.673131 ( -0.0217196 0.0218308 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.47854e-06 ( -1.91973e-07 1.92326e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.316 sec. to 157.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39441 ( -0.288652 0.270807 )
Epeak [keV] : 37.4535 ( -6.64126 4.46472 )
Norm@50keV : 1.02494E-02 ( -0.00279088 0.00417406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.49 using 59 PHA bins.
# Reduced chi-squared = 0.7051 for 56 degrees of freedom
# Null hypothesis probability = 9.537485e-01
Photon flux (15-150 keV) in 165.8 sec: 0.632066 ( -0.025332 0.025516 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0429e-06 ( -2.37906e-07 2.39813e-07 ) ergs/cm2
Band function
Time interval is from -8.316 sec. to 157.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.35652 ( -0.308793 0.378036 )
beta : -2.95859 ( 2.9481 0.480752 )
Epeak [keV] : 37.4959 ( -6.41374 4.38931 )
Norm@50keV : 1.07813E-02 ( -0.00333116 0.00687961 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.40 using 59 PHA bins.
# Reduced chi-squared = 0.7164 for 55 degrees of freedom
# Null hypothesis probability = 9.442714e-01
Photon flux (15-150 keV) in 165.8 sec: 0.631220 ( 6.36878 -0.025484 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.04467e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 11.0844 ( )
R^2/D10^2 : 0.189896 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 208.27 using 59 PHA bins.
# Reduced chi-squared = 3.6539 for 57 degrees of freedom
# Null hypothesis probability = 4.278510e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.095e-07 4.278e-08
25- 50 2.311e-06 7.461e-08
50-150 1.614e-06 1.122e-07
15-150 4.734e-06 1.467e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 60.5283 (-4.91418 5.59085)
Norm : 3.36593 (-0.187851 0.201127)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.71 using 59 PHA bins.
# Reduced chi-squared = 0.6967 for 57 degrees of freedom
# Null hypothesis probability = 9.603941e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.405e-06 6.325e-08
25- 50 2.143e-06 6.881e-08
50-150 2.457e-06 1.666e-07
15-150 6.005e-06 1.791e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.25130 (-0.65235 0.752246)
R1^2/D10^2 : 2.25186 (-0.907448 1.68793)
kT2 [keV] : 15.9458 (-1.28757 1.71457)
R2^2/D10^2 : 3.51631E-02 (-0.0131397 0.0163681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.58 using 59 PHA bins.
# Reduced chi-squared = 0.8105 for 55 degrees of freedom
# Null hypothesis probability = 8.413421e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.407e-06 1.954e-07
25- 50 2.097e-06 1.898e-07
50-150 2.326e-06 2.197e-07
15-150 5.830e-06 4.667e-07
Peak spectrum fit
Power-law model
Time interval is from 133.804 sec. to 134.804 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.26374 ( -0.082963 0.0849268 )
Norm@50keV : 3.50976E-02 ( -0.00195753 0.00194236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.85 using 59 PHA bins.
# Reduced chi-squared = 1.576 for 57 degrees of freedom
# Null hypothesis probability = 3.590795e-03
Photon flux (15-150 keV) in 1 sec: 6.01235 ( -0.293126 0.293697 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.33258e-07 ( -1.63747e-08 1.64241e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 133.804 sec. to 134.804 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.865355 ( -0.507829 0.45052 )
Epeak [keV] : 34.2804 ( -4.75109 3.4769 )
Norm@50keV : 0.216764 ( -0.0958151 0.205639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.53 using 59 PHA bins.
# Reduced chi-squared = 0.9738 for 56 degrees of freedom
# Null hypothesis probability = 5.305874e-01
Photon flux (15-150 keV) in 1 sec: 5.66357 ( -0.30903 0.3101 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.04261e-07 ( -1.7647e-08 1.7972e-08 ) ergs/cm2
Band function
Time interval is from 133.804 sec. to 134.804 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.393643 ( -0.327606 0.452735 )
beta : -3.09516 ( 10 0.00147864 )
Epeak [keV] : 33.8357 ( -2.72627 3.48052 )
Norm@50keV : 0.436778 ( -0.279208 1.61068 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.30 using 59 PHA bins.
# Reduced chi-squared = 0.9509 for 55 degrees of freedom
# Null hypothesis probability = 5.783652e-01
Photon flux (15-150 keV) in 1 sec: 5.63677 ( 1.36323 -0.30925 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.08742e-07 ( -3.08735e-07 -1.7723e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.60154 (-0.442498 0.463242)
R^2/D10^2 : 3.18462 (-0.562822 0.681573)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.61 using 59 PHA bins.
# Reduced chi-squared = 1.712 for 57 degrees of freedom
# Null hypothesis probability = 6.553804e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.889e-08 4.635e-09
25- 50 1.381e-07 6.550e-09
50-150 6.399e-08 8.020e-09
15-150 2.610e-07 1.300e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.6804 (-4.91316 5.73072)
Norm : 34.8291 (-2.93252 3.20393)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.27 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 57 degrees of freedom
# Null hypothesis probability = 4.650413e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.420e-08 5.140e-09
25- 50 1.188e-07 5.700e-09
50-150 1.102e-07 1.266e-08
15-150 3.133e-07 1.540e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.86058 (-1.4424 1.11586)
R1^2/D10^2 : 8.71518 (-3.18481 10.242)
kT2 [keV] : 17.5024 (-4.07943 7.15457)
R2^2/D10^2 : 0.147228 (-0.116187 0.421355)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.44 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 55 degrees of freedom
# Null hypothesis probability = 4.578743e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.362e-08 9.915e-09
25- 50 1.262e-07 1.975e-08
50-150 1.041e-07 4.353e-08
15-150 3.039e-07 6.615e-08
Plot creation:
Fri Nov 18 17:35:37 EST 2016