batgrbproduct Analysis for Trigger=729293
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): Sun Jan 1 18:34:56 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger729293/batgroup_hand_proc
======================================================================
Trigger: 00729293 Segment: 000
BAT Trigger Time: 504930379.344 [s; MET]
Trigger Stop: 504930379.408 [s; MET]
UTC: 2017-01-01T02:26:00.951240 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 267.102656576912 Dec: 11.6542661795857 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.24
Image Trigger?: NO
Rate S/N Ratio: 98.9595877113481 [ if not an image trigger ]
Image S/N Ratio: 14.24
Flight Position: [ source = BAT ]
RA: 267.102656576912 Dec: 11.6542661795857 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 267.088750536453 Dec: 11.6416457988852 [deg; J2000]
{ 17h 48m 21.3s , +11d 38' 29.9" }
+/- 1.0954388252419 [arcmin] (estimated 90% radius based on SNR)
+/- 0.381983507121152 [arcmin] (formal 1-sigma fit error)
SNR: 26.7032369461833
Angular difference between Flight and Ground position is 1.114078 arcmin
Partial Coding Fraction: 0.1464844 [ including projection effects ]
Duration
T90: 3.18400001525879 +/- 0.93089203857794
Measured from: -0.271999955177307
to: 2.91200006008148 [s; relative to TRIGTIME]
T50: 0.976000010967255 +/- 0.0715541870086366
Measured from: 0.0640000104904175
to: 1.04000002145767 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.219999969005585
to: 0.780000030994415 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.63199996948242
to: 8.5120000243187 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.412552 3.862893 2.556562 0.456481
0.092896 0.097980 0.083931 0.053560 [error]
Peak 1.672874 2.364919 1.796812 0.398269
0.055897 0.067873 0.060617 0.034577 [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 1.18e-06 1.74e-06 1.91e-06 3.94e-06 6.03e-06 8.76e-06 erg/cm2
Error 6.82e-08 5.90e-08 8.34e-08 3.73e-07 2.00e-07 4.33e-07 erg/cm2
Peak flux Power-law 1.92e+01 1.82e+01 1.20e+01 1.23e+01 5.44e+01 6.17e+01 ph/cm2/s
Error 1.20e+00 6.92e-01 4.97e-01 1.05e+00 1.99e+00 2.09e+00 ph/cm2/s
Fluence Cutoff-PL 1.13e-06 1.77e-06 1.94e-06 2.99e-06 5.95e-06 7.83e-06 erg/cm2
Error 8.68e-08 6.65e-08 9.08e-08 9.11e-07 2.19e-07 8.53e-07 erg/cm2
Peak flux Cutoff-PL 1.80e+01 1.85e+01 1.24e+01 9.49e+00 5.36e+01 5.84e+01 ph/cm2/s
Error 1.51e+00 7.62e-01 5.93e-01 2.20e+00 1.57e+00 3.16e+00 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 1.865 0.060 - - 6.47e-02 2.13e-03 55.110 57
CPL 1.661 0.234 86.6 -32.0 8.12e-02 2.09e-02 52.830 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.599 0.060 - - 4.23e-01 1.45e-02 57.890 57
CPL 1.331 0.239 135.5 237.9 5.66e-01 1.46e-01 54.020 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: 1.920000 sec.
T50 in the 50-300 keV band: 0.576000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 10.144 -1.632 8.512
T90 3.184 -0.272 2.912
T50 0.976 0.064 1.040
Peak 1.000 -0.220 0.780
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
267.0888 11.6416 0.0071 37.1337 -92.6038 11.1299933 26.703 TRIG_00729293
Foreground time interval of the image:
-1.632 8.512 (delta_t = 10.144 [sec])
Background time interval of the image:
-82.043 -1.632 (delta_t = 80.411 [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 -1.632 sec. to 8.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86520 ( -0.0600444 0.0606258 )
Norm@50keV : 6.46806E-02 ( -0.00213844 0.00213067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.11 using 59 PHA bins.
# Reduced chi-squared = 0.9668 for 57 degrees of freedom
# Null hypothesis probability = 5.464399e-01
Photon flux (15-150 keV) in 10.14 sec: 9.14822 ( -0.325309 0.32659 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.0296e-06 ( -1.99375e-07 1.99627e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.632 sec. to 8.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66065 ( -0.242928 0.225666 )
Epeak [keV] : 86.5694 ( -22.4906 -86.5694 )
Norm@50keV : 8.11733E-02 ( -0.0172959 0.0244393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.83 using 59 PHA bins.
# Reduced chi-squared = 0.9433 for 56 degrees of freedom
# Null hypothesis probability = 5.957196e-01
Photon flux (15-150 keV) in 10.14 sec: 9.00554 ( -0.3586 0.36061 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.95294e-06 ( -2.19338e-07 2.18385e-07 ) ergs/cm2
Band function
Time interval is from -1.632 sec. to 8.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.64778 ( 1.6533 1.6533 )
beta : -2.06823 ( 2.08288 0.244507 )
Epeak [keV] : 83.1292 ( -85.2028 -85.2028 )
Norm@50keV : 8.25205E-02 ( -0.0175215 6.56736 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.84 using 59 PHA bins.
# Reduced chi-squared = 0.9607 for 55 degrees of freedom
# Null hypothesis probability = 5.576743e-01
Photon flux (15-150 keV) in 10.14 sec: 9.01759 ( ) 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] : 13.5288 ( )
R^2/D10^2 : 1.32083 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 300.53 using 59 PHA bins.
# Reduced chi-squared = 5.2725 for 57 degrees of freedom
# Null hypothesis probability = 8.565659e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.192e-07 3.260e-08
25- 50 1.865e-06 7.605e-08
50-150 2.207e-06 1.450e-07
15-150 4.591e-06 1.764e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 111.200 (-17.5493 13.2316)
Norm : 37.6888 (-1.59159 2.63653)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.79 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.747887e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.978e-07 6.885e-08
25- 50 1.761e-06 8.619e-08
50-150 3.023e-06 7.037e-07
15-150 5.782e-06 7.230e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.13569 (-0.665283 0.733125)
R1^2/D10^2 : 17.5167 (-6.10251 10.2903)
kT2 [keV] : 22.3771 (-1.98483 2.5252)
R2^2/D10^2 : 0.157460 (-0.0547707 0.0717364)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.48 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.552405e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.064e-06 1.264e-07
25- 50 1.744e-06 1.197e-07
50-150 3.030e-06 2.459e-07
15-150 5.837e-06 3.777e-07
Peak spectrum fit
Power-law model
Time interval is from -0.220 sec. to 0.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59870 ( -0.0593914 0.0597407 )
Norm@50keV : 0.423347 ( -0.0144626 0.0144534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.89 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 57 degrees of freedom
# Null hypothesis probability = 4.423921e-01
Photon flux (15-150 keV) in 1 sec: 54.3801 ( -1.98492 1.98916 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.95982e-06 ( -1.41925e-07 1.42099e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.220 sec. to 0.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.33110 ( -0.245112 0.233057 )
Epeak [keV] : 135.495 ( -40.4014 435.463 )
Norm@50keV : 0.566496 ( -0.124114 0.168382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.02 using 59 PHA bins.
# Reduced chi-squared = 0.9647 for 56 degrees of freedom
# Null hypothesis probability = 5.500903e-01
Photon flux (15-150 keV) in 1 sec: 53.5808 ( -1.0476 2.0933 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.91325e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.220 sec. to 0.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.950056 ( -0.487124 1.59034 )
beta : -1.71873 ( 1.71859 0.116704 )
Epeak [keV] : 67.2194 ( -34.259 193.369 )
Norm@50keV : 0.969139 ( -0.515103 13.9037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.09 using 59 PHA bins.
# Reduced chi-squared = 0.9653 for 55 degrees of freedom
# Null hypothesis probability = 5.478651e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.89946e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.4355 ( )
R^2/D10^2 : 5.42393 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 260.17 using 59 PHA bins.
# Reduced chi-squared = 4.5645 for 57 degrees of freedom
# Null hypothesis probability = 9.743642e-28
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.692e-07 1.770e-08
25- 50 1.098e-06 4.950e-08
50-150 1.802e-06 1.160e-07
15-150 3.169e-06 1.240e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 195.921 (-32.6369 -195.808)
Norm : 220.003 (-7.7732 8.63651)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.13 using 59 PHA bins.
# Reduced chi-squared = 0.9496 for 57 degrees of freedom
# Null hypothesis probability = 5.835526e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.475e-07 2.280e-08
25- 50 1.053e-06 4.890e-08
50-150 2.306e-06 1.035e-07
15-150 3.906e-06 3.955e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.69217 (-0.908065 0.964834)
R1^2/D10^2 : 41.8088 (-13.2607 22.2643)
kT2 [keV] : 28.0703 (-3.23315 4.56197)
R2^2/D10^2 : 0.489750 (-0.208049 0.291262)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.64 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.106341e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.966e-07 5.235e-08
25- 50 1.085e-06 8.620e-08
50-150 2.309e-06 2.580e-07
15-150 3.890e-06 3.345e-07
Plot creation:
Sun Jan 1 21:08:39 EST 2017