batgrbproduct Analysis for Trigger=715209
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 16:21:21 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger715209/GCN5_download_cron
======================================================================
Trigger: 00715209 Segment: 000
BAT Trigger Time: 497305960 [s; MET]
Trigger Stop: 497306336 [s; MET]
UTC: 2016-10-04T20:32:23.041100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.004510881698 Dec: -15.7181996033977 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 15.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.79
Flight Position: [ source = BAT ]
RA: 245.004510881698 Dec: -15.7181996033977 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.994039880721 Dec: -15.6403998307287 [deg; J2000]
{ 16h 19m 58.6s , -15d 38' 25.4" }
+/- 0.944428046717676 [arcmin] (estimated 90% radius based on SNR)
+/- 0.25730438725679 [arcmin] (formal 1-sigma fit error)
SNR: 33.0058874561715
Angular difference between Flight and Ground position is 4.707014 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
T50: 376 +/-
Measured from: 0
to: 376 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 376 second)
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 376 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 7.623509 0.698320 0.055667 0.026858
0.108290 0.096172 0.081263 0.071473 [error]
Peak 7.623509 0.698320 0.055667 0.026858
0.108290 0.096172 0.081263 0.071473 [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 2.50e-06 3.20e-07 1.79e-08 1.05e-09 2.84e-06 2.84e-06 erg/cm2
Error 2.28e-07 4.66e-08 6.75e-09 6.88e-10 2.23e-07 2.23e-07 erg/cm2
Peak flux Power-law 4.86e-01 3.65e-02 1.02e-03 2.93e-05 5.24e-01 5.24e-01 ph/cm2/s
Error 4.61e-02 5.04e-03 3.75e-04 1.86e-05 4.53e-02 4.53e-02 ph/cm2/s
Fluence Cutoff-PL 2.44e-06 2.42e-07 5.46e-10 2.45e-15 2.68e-06 2.68e-06 erg/cm2
Error 2.53e-07 5.79e-08 2.40e-09 3.79e-12 2.58e-07 2.58e-07 erg/cm2
Peak flux Cutoff-PL 4.69e-01 2.90e-02 3.48e-05 8.09e-11 4.98e-01 4.98e-01 ph/cm2/s
Error 5.22e-02 6.26e-03 1.46e-04 1.20e-07 5.23e-02 5.22e-02 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 6.159 0.342 - - 1.08e-04 3.32e-05 48.480 57
CPL 1.000 0.000 50.0 0.0 2.16e-03 0.00e+00 452.330 56
The chi2 of BB fit is 42.31 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 6.159 0.342 - - 1.08e-04 3.32e-05 48.480 57
CPL 1.000 0.000 50.0 0.0 2.16e-03 0.00e+00 452.330 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 376.000 0.000 376.000
T90 376.000 0.000 376.000
T50 376.000 0.000 376.000
Peak 376.000 0.000 376.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9940 -15.6404 0.0058 23.2 -120.2 9.2782 33.0 TRIG_00715209
------------------------------------------
Foreground time interval of the image:
0.000 82.650 (delta_t = 82.650 [sec])
84.000 183.088 (delta_t = 99.088 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.650000
84.000000 183.088400
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.15944 ( -0.339908 0.34347 )
Norm@50keV : 1.08391E-04 ( -2.90951e-05 3.7379e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 57 degrees of freedom
# Null hypothesis probability = 7.819000e-01
Photon flux (15-150 keV) in 181.7 sec: 0.523769 ( -0.0451071 0.0455693 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8365e-06 ( -2.22266e-07 2.24094e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.650000
84.000000 183.088400
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.15947E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 452.33 using 59 PHA bins.
# Reduced chi-squared = 8.0774 for 56 degrees of freedom
# Null hypothesis probability = 2.313728e-63
Photon flux (15-150 keV) in 181.7 sec: 0.497872 ( -0.052944 0.051597 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68091e-06 ( -2.61793e-07 2.54089e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 82.650000
84.000000 183.088400
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.57776 ( 4.5336 7.57776 )
beta : -6.19834 ( -0.31504 0.371993 )
Epeak [keV] : 301.176 ( -301.176 -301.176 )
Norm@50keV : 1.42115E-02 ( -0.00365158 0.00540977 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.51 using 59 PHA bins.
# Reduced chi-squared = 0.8821 for 55 degrees of freedom
# Null hypothesis probability = 7.191347e-01
Photon flux (15-150 keV) in 181.7 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] : 2.64321 (-0.160462 0.177107)
R^2/D10^2 : 160.699 (-65.5404 109.912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.31 using 59 PHA bins.
# Reduced chi-squared = 0.7423 for 57 degrees of freedom
# Null hypothesis probability = 9.266723e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-06 3.626e-07
25- 50 2.178e-07 4.067e-08
50-150 1.170e-10 6.931e-11
15-150 2.596e-06 4.324e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.55307 (-0.395137 0.460227)
Norm : 165.073 (-57.9279 89.3646)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.18 using 59 PHA bins.
# Reduced chi-squared = 0.7225 for 57 degrees of freedom
# Null hypothesis probability = 9.431649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.455e-06 3.561e-07
25- 50 2.491e-07 4.225e-08
50-150 7.877e-10 4.815e-10
15-150 2.705e-06 3.334e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.23859 (-0.180664 0.19846)
R1^2/D10^2 : 3.83131E+04 (-43174.3 -43265)
kT2 [keV] : 2.82533 (-0.24483 64.6333)
R2^2/D10^2 : 88.7842 (-91.9213 116.841)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 40.11 using 59 PHA bins.
# Reduced chi-squared = 0.7655 for 55 degrees of freedom
# Reduced chi-squared = 0.7292 for 55 degrees of freedom
# Null hypothesis probability = 8.991370e-01
# Null hypothesis probability = 9.342090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.380e-06 3.778e-07
25- 50 2.171e-07 4.199e-08
50-150 1.388e-08 6.724e-11
15-150 2.611e-06 3.770e-07
Peak spectrum fit
Power-law model
Time interval is from 84.000 sec. to 183.088 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.15944 ( -0.339908 0.34347 )
Norm@50keV : 1.08391E-04 ( -2.90951e-05 3.7379e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8505 for 57 degrees of freedom
# Null hypothesis probability = 7.819000e-01
Photon flux (15-150 keV) in 181.7 sec: 0.523769 ( -0.0451071 0.0455693 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.8365e-06 ( -2.22266e-07 2.24094e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 84.000 sec. to 183.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.15947E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 452.33 using 59 PHA bins.
# Reduced chi-squared = 8.0774 for 56 degrees of freedom
# Null hypothesis probability = 2.313728e-63
Photon flux (15-150 keV) in 181.7 sec: 0.497872 ( -0.052944 0.051597 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.68091e-06 ( -2.61793e-07 2.54089e-07 ) ergs/cm2
Band function
Time interval is from 84.000 sec. to 183.088 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.57776 ( 4.5336 7.57776 )
beta : -6.19834 ( -0.31504 0.371993 )
Epeak [keV] : 301.176 ( -301.176 -301.176 )
Norm@50keV : 1.42115E-02 ( -0.00365158 0.00540977 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.51 using 59 PHA bins.
# Reduced chi-squared = 0.8821 for 55 degrees of freedom
# Null hypothesis probability = 7.191347e-01
Photon flux (15-150 keV) in 181.7 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] : 2.64321 (-0.160462 0.177107)
R^2/D10^2 : 160.699 (-65.5404 109.912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.31 using 59 PHA bins.
# Reduced chi-squared = 0.7423 for 57 degrees of freedom
# Null hypothesis probability = 9.266723e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.378e-06 3.719e-07
25- 50 2.178e-07 4.079e-08
50-150 1.170e-10 7.237e-11
15-150 2.596e-06 3.897e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.55307 (-0.395137 0.460227)
Norm : 165.073 (-57.9279 89.3646)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.18 using 59 PHA bins.
# Reduced chi-squared = 0.7225 for 57 degrees of freedom
# Null hypothesis probability = 9.431649e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.455e-06 3.616e-07
25- 50 2.491e-07 4.903e-08
50-150 7.877e-10 4.546e-10
15-150 2.705e-06 3.470e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.23859 (-0.180664 0.19846)
R1^2/D10^2 : 3.83131E+04 (-43174.3 -43265)
kT2 [keV] : 2.82533 (-0.24483 64.6333)
R2^2/D10^2 : 88.7842 (-91.9213 116.841)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.10 using 59 PHA bins.
#Fit statistic : Chi-Squared = 40.11 using 59 PHA bins.
# Reduced chi-squared = 0.7655 for 55 degrees of freedom
# Reduced chi-squared = 0.7292 for 55 degrees of freedom
# Null hypothesis probability = 8.991370e-01
# Null hypothesis probability = 9.342090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.380e-06 4.046e-07
25- 50 2.171e-07 4.007e-08
50-150 1.388e-08 6.933e-11
15-150 2.611e-06 4.461e-07
Plot creation:
Wed Oct 5 16:25:19 EDT 2016