batgrbproduct Analysis for Trigger=663074
Analysis Summary
Special note:
- During this time when the CZT bias voltage is at -150v (not the normal -200v; GCN Circ. 18562),
the energy scale in the plots below and in the data from the Quicklook and HEASARC sites
is somewhat off from the proper calibration.
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): Thu Nov 12 10:26:51 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger663074/GCN5_download_cron
======================================================================
Trigger: 00663074 Segment: 000
BAT Trigger Time: 468923618.816 [s; MET]
Trigger Stop: 468923619.84 [s; MET]
UTC: 2015-11-11T08:33:23.417180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 56.8281970680934 Dec: -44.1639820922363 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.94
Image Trigger?: NO
Rate S/N Ratio: 17.2916164657906 [ if not an image trigger ]
Image S/N Ratio: 8.94
Flight Position: [ source = BAT ]
RA: 56.8281970680934 Dec: -44.1639820922363 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 56.8500855836094 Dec: -44.1535682577631 [deg; J2000]
{ 03h 47m 24.0s , -44d 09' 12.8" }
+/- 1.00017237727643 [arcmin] (estimated 90% radius based on SNR)
+/- 0.343741372698032 [arcmin] (formal 1-sigma fit error)
SNR: 30.4096514785593
Angular difference between Flight and Ground position is 1.130542 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 76.9359999299049 +/- 12.5860780084967
Measured from: -3.07599985599518
to: 73.8600000739098 [s; relative to TRIGTIME]
T50: 30.067999958992 +/- 3.20557761218053
Measured from: 3.02400010824203
to: 33.092000067234 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.516000032424927
to: 1.51600003242493 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.61599999666214
to: 91.3479999899864 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.967676 1.347942 0.744979 0.117792
0.053047 0.054710 0.046415 0.039035 [error]
Peak 0.015460 0.056714 0.046219 0.016329
0.005901 0.006392 0.005847 0.004446 [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 3.30e-07 5.16e-07 6.08e-07 1.39e-06 1.86e-06 2.84e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 2.42e-01 3.11e-01 2.91e-01 4.80e-01 1.01e+00 1.32e+00 ph/cm2/s
Error 6.46e-02 5.26e-02 4.39e-02 1.47e-01 1.46e-01 1.95e-01 ph/cm2/s
Fluence Cutoff-PL 2.90e-07 5.72e-07 6.10e-07 3.65e-07 1.71e-06 1.84e-06 erg/cm2
Error 3.15e-08 3.65e-08 5.22e-08 1.97e-07 1.22e-07 2.28e-07 erg/cm2
Peak flux Cutoff-PL 1.67e-01 3.57e-01 3.38e-01 1.14e-01 9.50e-01 9.75e-01 ph/cm2/s
Error 7.58e-02 6.83e-02 5.67e-02 -------- 1.52e-01 1.86e-01 ph/cm2/s
Fluence Band 2.76e-07 5.90e-07 5.78e-07 7.76e-07 1.73e-06 2.23e-06 erg/cm2
Error 3.31e-08 3.94e-08 5.19e-08 -------- 1.16e-07 3.57e-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 1.764 0.000 - - 2.08e-03 0.00e+00 115.460 57
CPL 0.786 0.453 56.4 9.1 7.00e-03 4.25e-03 98.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.095 0.222 - - 8.68e-03 1.22e-03 70.520 57
CPL -0.711 1.514 78.4 38.8 6.45e-02 2.24e-01 63.600 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: 32.384000 sec.
T50 in the 50-300 keV band: 12.160000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 96.964 -5.616 91.348
T90 76.936 -3.076 73.860
T50 30.068 3.024 33.092
Peak 1.000 0.516 1.516
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
56.8501 -44.1536 0.0063 27.5 170.3 1.5541 30.4 TRIG_00663074
------------------------------------------
Foreground time interval of the image:
-5.616 12.385 (delta_t = 18.001 [sec])
Background time interval of the image:
-239.816 -5.616 (delta_t = 234.200 [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 -5.616 sec. to 91.348 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76385 ( )
Norm@50keV : 2.07852E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 115.46 using 59 PHA bins.
# Reduced chi-squared = 2.0256 for 57 degrees of freedom
# Null hypothesis probability = 7.548650e-06
Photon flux (15-150 keV) in 96.96 sec: 0.282500 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85824e-06 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.616 sec. to 91.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.786231 ( -0.478363 0.427797 )
Epeak [keV] : 56.4196 ( -6.55571 11.5767 )
Norm@50keV : 7.00314E-03 ( -0.00285565 0.00565158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.20 using 59 PHA bins.
# Reduced chi-squared = 1.753 for 56 degrees of freedom
# Null hypothesis probability = 4.221871e-04
Photon flux (15-150 keV) in 96.96 sec: 0.270141 ( -0.015708 0.015724 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.7062e-06 ( -1.21016e-07 1.23159e-07 ) ergs/cm2
Band function
Time interval is from -5.616 sec. to 91.348 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.201639 ( -0.702338 5.11663 )
beta : -2.30947 ( -0.449685 0.381491 )
Epeak [keV] : 46.5979 ( -17.2286 9.74141 )
Norm@50keV : 1.63747E-02 ( -0.0113393 42.3151 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.39 using 59 PHA bins.
# Reduced chi-squared = 1.716 for 55 degrees of freedom
# Null hypothesis probability = 7.557852e-04
Photon flux (15-150 keV) in 96.96 sec: 0.269189 ( 6.73081 -0.015545 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73412e-06 ( -1.73344e-06 -1.15741e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.0345 ( )
R^2/D10^2 : 6.81609E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 141.42 using 59 PHA bins.
# Reduced chi-squared = 2.4811 for 57 degrees of freedom
# Null hypothesis probability = 3.987362e-09
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.025e-07 1.833e-08
25- 50 6.394e-07 3.748e-08
50-150 5.579e-07 6.395e-08
15-150 1.400e-06 8.387e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 107.594 (-20.3014 24.1535)
Norm : 1.22541 (-0.0830523 0.102981)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 101.93 using 59 PHA bins.
# Reduced chi-squared = 1.7882 for 57 degrees of freedom
# Null hypothesis probability = 2.379338e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.104e-07 2.725e-08
25- 50 5.445e-07 3.238e-08
50-150 9.187e-07 2.654e-07
15-150 1.773e-06 2.691e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.23489 (-1.42699 1.29894)
R1^2/D10^2 : 0.198704 (-0.0689276 0.142512)
kT2 [keV] : 25.4631 (-6.36225 13.4189)
R2^2/D10^2 : 2.52018E-03 (-0.00196521 0.00588606)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.71 using 59 PHA bins.
# Reduced chi-squared = 1.722 for 55 degrees of freedom
# Null hypothesis probability = 7.017748e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.684e-07 3.592e-08
25- 50 5.997e-07 1.080e-07
50-150 8.761e-07 3.590e-07
15-150 1.744e-06 4.413e-07
Peak spectrum fit
Power-law model
Time interval is from 0.516 sec. to 1.516 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09468 ( -0.226362 0.218163 )
Norm@50keV : 8.67632E-03 ( -0.00122427 0.00122185 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.52 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 57 degrees of freedom
# Null hypothesis probability = 1.075497e-01
Photon flux (15-150 keV) in 1 sec: 1.00588 ( -0.145693 0.146243 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.08686e-08 ( -1.35016e-08 1.35926e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.516 sec. to 1.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.710947 ( -1.7833 1.24526 )
Epeak [keV] : 78.3728 ( -17.1418 60.5376 )
Norm@50keV : 6.45056E-02 ( -0.064504 0.383445 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.60 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 56 degrees of freedom
# Null hypothesis probability = 2.264669e-01
Photon flux (15-150 keV) in 1 sec: 0.950059 ( -0.152119 0.152061 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.11939e-08 ( -1.54608e-08 1.56619e-08 ) ergs/cm2
Band function
Time interval is from 0.516 sec. to 1.516 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96467 ( -4.51751 -4.96467 )
beta : -1.72805 ( -0.700064 0.396879 )
Epeak [keV] : 44.7972 ( -7.92765 7.86957 )
Norm@50keV : 24.7172 ( -3.32741 53.3818 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.82 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 55 degrees of freedom
# Null hypothesis probability = 3.050428e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72085e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.0935 (-2.5309 3.19149)
R^2/D10^2 : 6.99379E-02 (-0.0296356 0.0465741)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.57 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 57 degrees of freedom
# Null hypothesis probability = 2.291357e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.577e-09 1.244e-09
25- 50 2.125e-08 4.260e-09
50-150 5.056e-08 1.228e-08
15-150 7.638e-08 1.461e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-36.6271 -200)
Norm : 4.18443 (-0.605274 0.605274)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.74 using 59 PHA bins.
# Reduced chi-squared = 1.399 for 57 degrees of freedom
# Null hypothesis probability = 2.506805e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.042e-08 5.925e-09
25- 50 2.005e-08 1.148e-08
50-150 4.397e-08 2.434e-08
15-150 7.444e-08 4.189e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 14.8950 (-2.59791 3.02611)
R1^2/D10^2 : 0.114405 (-0.0571706 0.112146)
kT2 [keV] : 200.000 (-200 -200)
R2^2/D10^2 : 9.76614E-05 (-7.6549e-05 9.28765e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.52 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.40 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 55 degrees of freedom
# Reduced chi-squared = 1.098 for 55 degrees of freedom
# Null hypothesis probability = 2.834637e-01
# Null hypothesis probability = 2.871115e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.479e-09 3.139e-09
25- 50 2.201e-08 1.140e-08
50-150 5.785e-08 2.849e-08
15-150 8.534e-08 4.124e-08
Plot creation:
Thu Nov 12 10:31:24 EST 2015