batgrbproduct Analysis for Trigger=718919
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): Mon Oct 24 21:43:10 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger718919/GCN5_download_cron
======================================================================
Trigger: 00718919 Segment: 000
BAT Trigger Time: 498935480 [s; MET]
Trigger Stop: 498935544 [s; MET]
UTC: 2016-10-23T17:11:02.948720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.821885912884 Dec: 43.9359283194799 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.8
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.8
Flight Position: [ source = BAT ]
RA: 197.821885912884 Dec: 43.9359283194799 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.834469551701 Dec: 43.9269073767043 [deg; J2000]
{ 13h 11m 20.3s , +43d 55' 36.9" }
+/- 3.64152518995643 [arcmin] (estimated 90% radius based on SNR)
+/- 2.17189236612661 [arcmin] (formal 1-sigma fit error)
SNR: 4.80048445671971
Angular difference between Flight and Ground position is 0.767212 arcmin
Partial Coding Fraction: 0.796875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.118046 0.209568 0.117359 0.000722
0.046249 0.047902 0.042125 0.038000 [error]
Peak 0.118046 0.209568 0.117359 0.000722
0.046249 0.047902 0.042125 0.038000 [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 4.03e-08 6.79e-08 8.69e-08 2.24e-07 2.57e-07 4.18e-07 erg/cm2
Error 1.74e-08 2.09e-08 3.82e-08 2.01e-07 9.32e-08 2.40e-07 erg/cm2
Peak flux Power-law 2.04e-02 1.88e-02 1.21e-02 1.19e-02 5.62e-02 6.31e-02 ph/cm2/s
Error 8.96e-03 5.82e-03 5.14e-03 9.82e-03 1.73e-02 2.01e-02 ph/cm2/s
Fluence Cutoff-PL 3.26e-08 8.66e-08 8.27e-08 1.87e-08 2.18e-07 2.21e-07 erg/cm2
Error 2.01e-08 3.00e-08 5.02e-08 1.31e-07 8.87e-08 1.65e-07 erg/cm2
Peak flux Cutoff-PL 1.61e-02 2.37e-02 1.21e-02 1.49e-03 5.32e-02 5.33e-02 ph/cm2/s
Error 1.03e-02 8.21e-03 9.35e-03 4.93e-03 1.71e-02 1.76e-02 ph/cm2/s
Fluence Band 3.23e-08 8.63e-08 8.26e-08 1.87e-08 2.18e-07 2.21e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.61e-02 2.37e-02 1.21e-02 1.51e-03 5.32e-02 5.33e-02 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 1.644 0.505 - - 4.31e-04 1.47e-04 61.390 57
CPL -0.497 3.123 50.3 -17.4 6.80e-03 6.51e-01 58.790 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.644 0.505 - - 4.31e-04 1.47e-04 61.390 57
CPL -0.497 3.123 50.3 -17.4 6.80e-03 6.51e-01 58.790 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.8345 +43.9269 0.0403 20.3 -120.7 0.4395 4.8 TRIG_00718919
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
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 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64364 ( -0.485604 0.52423 )
Norm@50keV : 4.31009E-04 ( -0.000149 0.000145191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.39 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.217240e-01
Photon flux (15-150 keV) in 64 sec: 5.61607E-02 ( -0.0172638 0.0172711 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56799e-07 ( -9.05786e-08 9.57427e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.497471 ( -4.0034 2.24214 )
Epeak [keV] : 50.3297 ( -15.5523 -50.366 )
Norm@50keV : 6.79779E-03 ( -0.00685213 1.29499 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.79 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 56 degrees of freedom
# Null hypothesis probability = 3.736826e-01
Photon flux (15-150 keV) in 64 sec: 5.31530E-02 ( -0.0169816 0.0173058 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17987e-07 ( -7.88314e-08 9.8583e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.440933 ( -1.80662 4.09992 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 50.8368 ( -50.8288 193.505 )
Norm@50keV : 6.17631E-03 ( -0.00631835 7.54342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380017e-01
Photon flux (15-150 keV) in 64 sec: 5.31816E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17939e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.3356 (-3.37815 4.73591)
R^2/D10^2 : 1.35188E-02 (-0.013519 0.0292339)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.11 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.984522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.790e-08 1.742e-08
25- 50 9.064e-08 5.283e-08
50-150 8.445e-08 5.494e-08
15-150 2.030e-07 1.285e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.500 (-67.1095 -111.562)
Norm : 0.253931 (-0.0822681 0.114429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.38 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.548289e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.682e-08 2.280e-08
25- 50 7.074e-08 4.291e-08
50-150 1.546e-07 9.382e-08
15-150 2.622e-07 1.626e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53374 (-6.49381 -6.49381)
R1^2/D10^2 : 4.50880E-02 (-0.0457048 -0.0457048)
kT2 [keV] : 15.1731 (-15.0788 -15.0788)
R2^2/D10^2 : 5.07807E-03 (-0.00524814 0.0334343)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.67 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Null hypothesis probability = 3.424074e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.395e-08 2.674e-08
25- 50 8.465e-08 5.334e-08
50-150 1.017e-07 7.373e-08
15-150 2.203e-07 1.406e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64364 ( -0.485604 0.52423 )
Norm@50keV : 4.31009E-04 ( -0.000149 0.000145191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.39 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.217240e-01
Photon flux (15-150 keV) in 64 sec: 5.61607E-02 ( -0.0172638 0.0172711 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56799e-07 ( -9.05786e-08 9.57427e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.497471 ( -4.0034 2.24214 )
Epeak [keV] : 50.3297 ( -15.5523 -50.366 )
Norm@50keV : 6.79779E-03 ( -0.00685213 1.29499 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.79 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 56 degrees of freedom
# Null hypothesis probability = 3.736826e-01
Photon flux (15-150 keV) in 64 sec: 5.31530E-02 ( -0.0169816 0.0173058 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17987e-07 ( -7.88314e-08 9.8583e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.440933 ( -1.80662 4.09992 )
beta : -9.37167 ( 9.37167 19.3716 )
Epeak [keV] : 50.8368 ( -50.8288 200.263 )
Norm@50keV : 6.17631E-03 ( -0.00631835 7.54342 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.80 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.380017e-01
Photon flux (15-150 keV) in 64 sec: 5.31816E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.17939e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.3356 (-3.37815 4.73591)
R^2/D10^2 : 1.35188E-02 (-0.013519 0.0292339)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.11 using 59 PHA bins.
# Reduced chi-squared = 1.037 for 57 degrees of freedom
# Null hypothesis probability = 3.984522e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.790e-08 1.749e-08
25- 50 9.064e-08 5.565e-08
50-150 8.445e-08 5.904e-08
15-150 2.030e-07 1.206e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 108.500 (-67.1095 -111.562)
Norm : 0.253931 (-0.0822681 0.114429)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.38 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 57 degrees of freedom
# Null hypothesis probability = 3.548289e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.682e-08 2.218e-08
25- 50 7.074e-08 4.317e-08
50-150 1.546e-07 9.549e-08
15-150 2.622e-07 1.549e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.53374 (-6.49381 -6.49381)
R1^2/D10^2 : 4.50880E-02 (-0.0457048 -0.0457048)
kT2 [keV] : 15.1731 (-15.0788 -15.0788)
R2^2/D10^2 : 5.07807E-03 (-0.00524814 0.0334343)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.67 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Null hypothesis probability = 3.424074e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.395e-08 2.134e-08
25- 50 8.465e-08 5.344e-08
50-150 1.017e-07 7.578e-08
15-150 2.203e-07 1.461e-07
Plot creation:
Mon Oct 24 21:46:42 EDT 2016