batgrbproduct Analysis for Trigger=715246
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): Wed Oct 5 16:14:07 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger715246/GCN5_download_cron
======================================================================
Trigger: 00715246 Segment: 000
BAT Trigger Time: 497315296.256 [s; MET]
Trigger Stop: 497315297.28 [s; MET]
UTC: 2016-10-04T23:07:59.296560 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 112.157428447963 Dec: -39.8946229194368 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.22
Image Trigger?: NO
Rate S/N Ratio: 152.833242457261 [ if not an image trigger ]
Image S/N Ratio: 24.22
Flight Position: [ source = BAT ]
RA: 112.157428447963 Dec: -39.8946229194368 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 112.15580223496 Dec: -39.8964732071148 [deg; J2000]
{ 07h 28m 37.4s , -39d 53' 47.3" }
+/- 0.50811802882968 [arcmin] (estimated 90% radius based on SNR)
+/- 0.1420555001686 [arcmin] (formal 1-sigma fit error)
SNR: 80.0145458862058
Angular difference between Flight and Ground position is 0.133898 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 15.8679999709129 +/- 0.716100569843843
Measured from: -2.63599985837936
to: 13.2320001125336 [s; relative to TRIGTIME]
T50: 6.32399994134903 +/- 0.139999985694885
Measured from: 0.332000136375427
to: 6.65600007772446 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.356000006198883
to: 1.35600000619888 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.1599999666214
to: 27.3080000281334 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.314231 5.123240 4.018600 0.947217
0.048648 0.055077 0.049853 0.035997 [error]
Peak 0.216347 0.453260 0.442465 0.128098
0.010660 0.013690 0.013823 0.009367 [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 1.16e-06 2.17e-06 3.14e-06 9.60e-06 8.92e-06 1.61e-05 erg/cm2
Error 4.22e-08 4.61e-08 5.87e-08 4.21e-07 1.50e-07 4.41e-07 erg/cm2
Peak flux Power-law 2.38e+00 3.10e+00 2.95e+00 4.98e+00 1.01e+01 1.34e+01 ph/cm2/s
Error 1.62e-01 1.29e-01 1.12e-01 3.99e-01 3.55e-01 4.97e-01 ph/cm2/s
Fluence Cutoff-PL 1.08e-06 2.19e-06 3.22e-06 7.09e-06 8.80e-06 1.36e-05 erg/cm2
Error 5.68e-08 4.80e-08 7.14e-08 1.02e-06 1.61e-07 1.02e-06 erg/cm2
Peak flux Cutoff-PL 2.11e+00 3.19e+00 3.13e+00 3.11e+00 9.91e+00 1.15e+01 ph/cm2/s
Error 2.02e-01 1.43e-01 1.42e-01 6.91e-01 3.65e-01 7.71e-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 1.471 0.031 - - 2.88e-02 4.87e-04 47.750 57
CPL 1.208 0.130 176.9 73.1 3.73e-02 4.69e-03 35.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.071 0.058 - - 8.72e-02 3.00e-03 50.070 57
CPL 0.578 0.248 164.0 68.1 1.46e-01 3.73e-02 37.270 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: 14.080000 sec.
T50 in the 50-300 keV band: 5.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 32.468 -5.160 27.308
T90 15.868 -2.636 13.232
T50 6.324 0.332 6.656
Peak 1.000 0.356 1.356
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
112.1558 -39.8965 0.0024 26.6 -50.8 13.1741 80.0 TRIG_00715246
------------------------------------------
Foreground time interval of the image:
-5.160 14.345 (delta_t = 19.505 [sec])
Background time interval of the image:
-32.155 -5.160 (delta_t = 26.995 [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 -5.160 sec. to 27.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47134 ( -0.0313794 0.0313212 )
Norm@50keV : 2.88089E-02 ( -0.00048677 0.000486525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.75 using 59 PHA bins.
# Reduced chi-squared = 0.8377 for 57 degrees of freedom
# Null hypothesis probability = 8.037526e-01
Photon flux (15-150 keV) in 32.47 sec: 3.56948 ( -0.0710299 0.0712722 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.91707e-06 ( -1.50093e-07 1.50117e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.160 sec. to 27.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.20783 ( -0.132049 0.128445 )
Epeak [keV] : 176.855 ( -39.4909 106.753 )
Norm@50keV : 3.73445E-02 ( -0.00433644 0.00504122 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 35.21 using 59 PHA bins.
# Reduced chi-squared = 0.6287 for 56 degrees of freedom
# Null hypothesis probability = 9.865966e-01
Photon flux (15-150 keV) in 32.47 sec: 3.49108 ( -0.079 0.07947 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.80194e-06 ( -1.61506e-07 1.60856e-07 ) ergs/cm2
Band function
Time interval is from -5.160 sec. to 27.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.450135 ( -0.520193 1.52384 )
beta : -1.56272 ( -0.0776426 0.0606219 )
Epeak [keV] : 60.6369 ( -25.7088 51.8476 )
Norm@50keV : 0.106373 ( -0.0610094 0.742565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 28.91 using 59 PHA bins.
# Reduced chi-squared = 0.5257 for 55 degrees of freedom
# Null hypothesis probability = 9.985576e-01
Photon flux (15-150 keV) in 32.47 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] : 18.3910 ( )
R^2/D10^2 : 0.194265 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 702.26 using 59 PHA bins.
# Reduced chi-squared = 12.320 for 57 degrees of freedom
# Null hypothesis probability = 6.066232e-112
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.242e-07 1.542e-08
25- 50 1.993e-06 5.098e-08
50-150 4.919e-06 1.185e-07
15-150 7.336e-06 1.331e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-2.8515 -200)
Norm : 14.9061 (-0.248461 0.248461)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 84.57 using 59 PHA bins.
# Reduced chi-squared = 1.484 for 57 degrees of freedom
# Null hypothesis probability = 1.032122e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.206e-06 2.322e-08
25- 50 2.319e-06 4.741e-08
50-150 5.086e-06 9.741e-08
15-150 8.611e-06 1.705e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.73270 (-0.570817 0.593982)
R1^2/D10^2 : 1.64015 (-0.308813 0.404758)
kT2 [keV] : 31.8387 (-2.21815 2.75285)
R2^2/D10^2 : 2.28302E-02 (-0.00577586 0.00682625)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.58 using 59 PHA bins.
# Reduced chi-squared = 0.7015 for 55 degrees of freedom
# Null hypothesis probability = 9.545046e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.911e-07 5.406e-08
25- 50 2.291e-06 6.949e-08
50-150 5.540e-06 2.159e-07
15-150 8.723e-06 2.614e-07
Peak spectrum fit
Power-law model
Time interval is from 0.356 sec. to 1.356 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07064 ( -0.0584454 0.0581585 )
Norm@50keV : 8.71704E-02 ( -0.00299634 0.00299518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.07 using 59 PHA bins.
# Reduced chi-squared = 0.8784 for 57 degrees of freedom
# Null hypothesis probability = 7.305988e-01
Photon flux (15-150 keV) in 1 sec: 10.0844 ( -0.355142 0.355381 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.20109e-07 ( -3.44855e-08 3.45516e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.356 sec. to 1.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.578382 ( -0.254933 0.241205 )
Epeak [keV] : 163.964 ( -37.313 98.8756 )
Norm@50keV : 0.145624 ( -0.0316166 0.0429016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.27 using 59 PHA bins.
# Reduced chi-squared = 0.6656 for 56 degrees of freedom
# Null hypothesis probability = 9.745630e-01
Photon flux (15-150 keV) in 1 sec: 9.90592 ( -0.36469 0.36488 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.00921e-07 ( -3.665e-08 3.648e-08 ) ergs/cm2
Band function
Time interval is from 0.356 sec. to 1.356 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.448598 ( -0.789135 2.39419 )
beta : -1.26624 ( -0.133941 0.109559 )
Epeak [keV] : 64.8704 ( -23.7366 44.8327 )
Norm@50keV : 0.622671 ( -0.650568 27.4656 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.92 using 59 PHA bins.
# Reduced chi-squared = 0.5803 for 55 degrees of freedom
# Null hypothesis probability = 9.946224e-01
Photon flux (15-150 keV) in 1 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] : 20.5439 ( )
R^2/D10^2 : 0.447650 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 150.08 using 59 PHA bins.
# Reduced chi-squared = 2.6331 for 57 degrees of freedom
# Null hypothesis probability = 2.601356e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.603e-08 2.350e-09
25- 50 1.826e-07 9.300e-09
50-150 5.733e-07 3.310e-08
15-150 7.919e-07 3.460e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 41.2319 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 223.68 using 59 PHA bins.
# Reduced chi-squared = 3.9242 for 57 degrees of freedom
# Null hypothesis probability = 1.339558e-21
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.027e-07 3.865e-09
25- 50 1.975e-07 7.500e-09
50-150 4.332e-07 1.545e-08
15-150 7.333e-07 2.790e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.3082 (-1.47963 1.6236)
R1^2/D10^2 : 2.30264 (-0.698918 1.14796)
kT2 [keV] : 37.5720 (-6.06317 11.257)
R2^2/D10^2 : 5.13033E-02 (-0.0283579 0.0413873)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.14 using 59 PHA bins.
# Reduced chi-squared = 0.5844 for 55 degrees of freedom
# Null hypothesis probability = 9.941253e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.008e-08 8.500e-09
25- 50 1.959e-07 2.510e-08
50-150 6.514e-07 1.356e-07
15-150 9.073e-07 1.294e-07
Plot creation:
Wed Oct 5 16:17:11 EDT 2016