batgrbproduct Analysis for Trigger=701668
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): Mon Jun 27 20:40:55 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger701668/GCN5_download_cron
======================================================================
Trigger: 00701668 Segment: 000
BAT Trigger Time: 488676632 [s; MET]
Trigger Stop: 488676952 [s; MET]
UTC: 2016-06-26T23:30:15.525600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 186.443755724593 Dec: 12.7469721198798 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.34
Flight Position: [ source = BAT ]
RA: 186.443755724593 Dec: 12.7469721198798 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 186.57288565159 Dec: 12.7158788103473 [deg; J2000]
{ 12h 26m 17.5s , +12d 42' 57.2" }
+/- 4.1232481759635 [arcmin] (estimated 90% radius based on SNR)
+/- 2.92543544479285 [arcmin] (formal 1-sigma fit error)
SNR: 4.01980368075788
Angular difference between Flight and Ground position is 7.784173 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.391273 0.498306 0.147620 -0.068919
0.087464 0.090486 0.078340 0.068097 [error]
Peak 0.391273 0.498306 0.147620 -0.068919
0.087464 0.090486 0.078340 0.068097 [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 1.19e-07 1.49e-07 1.35e-07 2.14e-07 4.77e-07 6.18e-07 erg/cm2
Error 3.45e-08 3.90e-08 6.27e-08 1.89e-07 1.50e-07 2.75e-07 erg/cm2
Peak flux Power-law 1.22e-02 8.44e-03 3.83e-03 2.42e-03 2.56e-02 2.69e-02 ph/cm2/s
Error 3.59e-03 2.16e-03 1.72e-03 1.99e-03 6.23e-03 6.76e-03 ph/cm2/s
Fluence Cutoff-PL 1.07e-07 2.12e-07 2.37e-08 1.53e-11 3.43e-07 3.43e-07 erg/cm2
Error 4.29e-08 6.21e-08 5.89e-08 9.33e-09 1.01e-07 1.01e-07 erg/cm2
Peak flux Cutoff-PL 1.04e-02 1.24e-02 8.11e-04 2.81e-07 2.36e-02 2.36e-02 ph/cm2/s
Error 4.45e-03 3.51e-03 1.77e-03 1.50e-04 5.89e-03 5.89e-03 ph/cm2/s
Fluence Band 1.10e-07 2.04e-07 6.30e-08 1.89e-08 3.91e-07 4.00e-07 erg/cm2
Error 3.80e-08 -------- 7.46e-08 8.46e-08 -------- -------- 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 2.139 0.449 - - 1.60e-04 5.56e-05 67.920 57
CPL -4.611 0.377 30.5 5.7 5.68e+00 1.54e+04 61.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.139 0.449 - - 1.60e-04 5.56e-05 67.920 57
CPL -4.611 0.377 30.5 5.7 5.68e+00 1.54e+04 61.840 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
186.5729 +12.7159 0.0479 10.7 -18.5 0.8403 4.0 TRIG_00701668
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13917 ( -0.414611 0.484139 )
Norm@50keV : 1.59877E-04 ( -5.58951e-05 5.54018e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.92 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 57 degrees of freedom
# Null hypothesis probability = 1.525744e-01
Photon flux (15-150 keV) in 320 sec: 2.56488E-02 ( -0.00622727 0.00624218 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77149e-07 ( -1.44095e-07 1.56219e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.61143 ( 3.29491 4.04984 )
Epeak [keV] : 30.4980 ( -4.73599 6.66044 )
Norm@50keV : 5.68410 ( -5.81492 30820.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.84 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 56 degrees of freedom
# Null hypothesis probability = 2.755143e-01
Photon flux (15-150 keV) in 320 sec: 2.35744E-02 ( -0.0058603 0.0059211 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4313e-07 ( -8.84621e-08 1.12656e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.86409 ( -5.17205 -4.86409 )
beta : -4.09117 ( 4.09117 1.54079 )
Epeak [keV] : 29.9782 ( -5.50679 4.80801 )
Norm@50keV : 9.18771 ( -2.07192 30.9385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.32 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.597049e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90861e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.91365 (-1.47414 1.88158)
R^2/D10^2 : 3.23445E-02 (-0.0185968 0.0404574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.62 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.837351e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.163e-07 5.058e-08
25- 50 1.997e-07 9.446e-08
50-150 5.058e-08 3.612e-08
15-150 3.665e-07 1.625e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.8110 (-19.0437 48.2562)
Norm : 0.160834 (-0.0542177 0.0874102)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.60 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.033895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.216e-07 4.376e-08
25- 50 1.662e-07 6.955e-08
50-150 1.416e-07 9.549e-08
15-150 4.293e-07 2.000e-07
Double BB
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.52 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Null hypothesis probability = 2.241737e-01
# Null hypothesis probability = 2.244627e-01
# Null hypothesis probability = 2.254758e-01
# Null hypothesis probability = 2.262144e-01
# Null hypothesis probability = 2.266260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.163e-07 6.462e+00
25- 50 1.997e-07 5.406e+01
50-150 5.059e-08 1.369e+03
15-150 3.665e-07 1.360e+03
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13917 ( -0.414611 0.484139 )
Norm@50keV : 1.59877E-04 ( -5.58951e-05 5.54018e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.92 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 57 degrees of freedom
# Null hypothesis probability = 1.525744e-01
Photon flux (15-150 keV) in 320 sec: 2.56488E-02 ( -0.00622727 0.00624218 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.77149e-07 ( -1.44095e-07 1.56219e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.61143 ( 3.29491 4.04984 )
Epeak [keV] : 30.4980 ( -4.73599 6.66044 )
Norm@50keV : 5.68410 ( -5.81492 30837.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.84 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 56 degrees of freedom
# Null hypothesis probability = 2.755143e-01
Photon flux (15-150 keV) in 320 sec: 2.35744E-02 ( -0.0058603 0.0059211 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4313e-07 ( -8.84621e-08 1.12656e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.86409 ( -5.17205 -4.86409 )
beta : -4.09117 ( 4.09117 1.54079 )
Epeak [keV] : 29.9782 ( -5.50679 4.80801 )
Norm@50keV : 9.18771 ( -2.07192 30.9385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.32 using 59 PHA bins.
# Reduced chi-squared = 1.115 for 55 degrees of freedom
# Null hypothesis probability = 2.597049e-01
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90861e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 7.91365 (-1.47414 1.88158)
R^2/D10^2 : 3.23445E-02 (-0.0185968 0.0404574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.62 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.837351e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.163e-07 4.954e-08
25- 50 1.997e-07 9.088e-08
50-150 5.058e-08 3.417e-08
15-150 3.665e-07 1.919e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.8110 (-19.0437 48.2562)
Norm : 0.160834 (-0.0542177 0.0874102)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.60 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 57 degrees of freedom
# Null hypothesis probability = 2.033895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.216e-07 4.418e-08
25- 50 1.662e-07 8.965e-08
50-150 1.416e-07 1.011e-07
15-150 4.293e-07 1.976e-07
Double BB
#Fit statistic : Chi-Squared = 62.57 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.54 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.52 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 55 degrees of freedom
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Null hypothesis probability = 2.241737e-01
# Null hypothesis probability = 2.244627e-01
# Null hypothesis probability = 2.254758e-01
# Null hypothesis probability = 2.262144e-01
# Null hypothesis probability = 2.266260e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.163e-07 6.250e+00
25- 50 1.997e-07 5.827e+01
50-150 5.059e-08 1.335e+03
15-150 3.665e-07 1.455e+03
Plot creation:
Mon Jun 27 20:48:18 EDT 2016