batgrbproduct Analysis for Trigger=707545
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): Sun Aug 7 14:44:22 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger707545/GCN5_download_cron
======================================================================
Trigger: 00707545 Segment: 000
BAT Trigger Time: 492173920 [s; MET]
Trigger Stop: 492174296 [s; MET]
UTC: 2016-08-06T10:58:23.330340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 282.076704186416 Dec: -2.44587266154937 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.06
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.06
Flight Position: [ source = BAT ]
RA: 282.076704186416 Dec: -2.44587266154937 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 282.073119278501 Dec: -2.4210529902485 [deg; J2000]
{ 18h 48m 17.5s , -02d 25' 15.8" }
+/- 3.75265071326052 [arcmin] (estimated 90% radius based on SNR)
+/- 2.20367396817654 [arcmin] (formal 1-sigma fit error)
SNR: 4.59870253247304
Angular difference between Flight and Ground position is 1.504606 arcmin
Partial Coding Fraction: 0.8203125 [ 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 0.818507 0.833005 -0.047799 -0.184584
0.131188 0.133220 0.115919 0.106694 [error]
Peak 0.818507 0.833005 -0.047799 -0.184584
0.131188 0.133220 0.115919 0.106694 [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 3.07e-07 2.40e-07 1.26e-07 9.61e-08 7.17e-07 7.69e-07 erg/cm2
Error 6.51e-08 6.84e-08 7.28e-08 1.17e-07 1.92e-07 2.45e-07 erg/cm2
Peak flux Power-law 2.72e-02 1.20e-02 3.14e-03 1.02e-03 4.29e-02 4.33e-02 ph/cm2/s
Error 5.89e-03 3.25e-03 1.76e-03 1.18e-03 8.62e-03 8.81e-03 ph/cm2/s
Fluence Cutoff-PL 3.00e-07 2.91e-07 6.46e-08 1.78e-09 6.58e-07 6.56e-07 erg/cm2
Error 7.17e-08 9.25e-08 7.97e-08 -------- 1.58e-07 1.60e-07 erg/cm2
Peak flux Cutoff-PL 2.61e-02 1.46e-02 1.76e-03 2.67e-05 4.25e-02 4.25e-02 ph/cm2/s
Error 6.54e-03 4.47e-03 2.02e-03 4.63e-04 8.23e-03 8.31e-03 ph/cm2/s
Fluence Band 2.98e-07 2.89e-07 6.45e-08 2.00e-09 6.56e-07 6.56e-07 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 3.29e-02 1.44e-02 1.77e-03 4.78e-05 4.91e-02 4.90e-02 ph/cm2/s
Error 9.13e-03 -------- 2.28e-03 -------- 1.20e-02 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.928 0.508 - - 1.64e-04 7.17e-05 59.920 57
CPL 0.838 0.000 17.5 0.0 4.37e-03 0.00e+00 56.960 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.928 0.508 - - 1.64e-04 7.17e-05 59.920 57
CPL 0.838 0.000 17.5 0.0 4.37e-03 0.00e+00 56.960 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
282.0731 -2.4211 0.0418 28.1 -179.2 1.7117 4.6 TRIG_00707545
------------------------------------------
Foreground time interval of the image:
0.000 174.050 (delta_t = 174.050 [sec])
175.000 376.000 (delta_t = 201.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 174.050000
175.000000 376.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.92806 ( -0.450211 0.565415 )
Norm@50keV : 1.64280E-04 ( -6.86813e-05 7.47095e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.92 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.701226e-01
Photon flux (15-150 keV) in 375 sec: 4.28973E-02 ( -0.00860447 0.00863848 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16786e-07 ( -1.82561e-07 2.00451e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 174.050000
175.000000 376.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.838283 ( )
Epeak [keV] : 17.4670 ( )
Norm@50keV : 4.36788E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.392953e-01
Photon flux (15-150 keV) in 375 sec: 4.25077E-02 ( -0.0082907 0.0081597 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58324e-07 ( -1.48316e-07 1.6794e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 174.050000
175.000000 376.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.536069 ( -1.73368 2.41992 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 19.2706 ( -10.9664 8.87654 )
Norm@50keV : 6.94771E-03 ( -0.00746296 1.61355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.038989e-01
Photon flux (15-150 keV) in 375 sec: 4.90783E-02 ( 6.95092 -0.0119334 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.5649e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.31019 (-1.21817 1.33904)
R^2/D10^2 : 0.132244 (-0.0741609 0.201382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.330846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.811e-07 1.076e-07
25- 50 3.122e-07 1.289e-07
50-150 3.500e-08 2.552e-08
15-150 6.283e-07 2.519e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.5555 (-6.78571 10.6665)
Norm : 0.515537 (-0.188435 0.349262)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.663538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.068e-07 9.000e-08
25- 50 2.743e-07 1.144e-07
50-150 8.600e-08 6.373e-08
15-150 6.671e-07 2.325e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.93879 (-2.18867 3.1248)
R1^2/D10^2 : 30.6289 (-13.1887 -13.2631)
kT2 [keV] : 7.30195 (-1.6979 1.8281)
R2^2/D10^2 : 6.21243E-02 (-0.0523555 0.050367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.07 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.688151e-01
# Null hypothesis probability = 4.719242e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.920e-07 1.391e-07
25- 50 3.079e-07 1.825e-07
50-150 6.245e-08 4.267e-08
15-150 6.623e-07 3.439e-07
Peak spectrum fit
Power-law model
Time interval is from 175.000 sec. to 376.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.92806 ( -0.450211 0.565415 )
Norm@50keV : 1.64280E-04 ( -6.86813e-05 7.47095e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.92 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 57 degrees of freedom
# Null hypothesis probability = 3.701226e-01
Photon flux (15-150 keV) in 375 sec: 4.28973E-02 ( -0.00860447 0.00863848 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16786e-07 ( -1.82561e-07 2.00451e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 175.000 sec. to 376.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.838283 ( )
Epeak [keV] : 17.4670 ( )
Norm@50keV : 4.36788E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.96 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 56 degrees of freedom
# Null hypothesis probability = 4.392953e-01
Photon flux (15-150 keV) in 375 sec: 4.25077E-02 ( -0.0082907 0.0081597 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.58324e-07 ( -1.48316e-07 1.6794e-07 ) ergs/cm2
Band function
Time interval is from 175.000 sec. to 376.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.536069 ( -1.73368 2.41992 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 19.2706 ( -10.9664 8.87546 )
Norm@50keV : 6.94771E-03 ( -0.00746296 1.61355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.91 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.038989e-01
Photon flux (15-150 keV) in 375 sec: 4.90783E-02 ( 6.95092 -0.0119334 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.5649e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.31019 (-1.21817 1.33904)
R^2/D10^2 : 0.132244 (-0.0741609 0.201382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.14 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.330846e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.811e-07 1.031e-07
25- 50 3.122e-07 1.179e-07
50-150 3.500e-08 2.409e-08
15-150 6.283e-07 2.181e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.5555 (-6.78571 10.6665)
Norm : 0.515537 (-0.188435 0.349262)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.23 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.663538e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.068e-07 1.027e-07
25- 50 2.743e-07 1.088e-07
50-150 8.600e-08 6.569e-08
15-150 6.671e-07 2.572e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.93879 (-1.98867 3.14727)
R1^2/D10^2 : 30.6289 (-13.1887 -13.2631)
kT2 [keV] : 7.30195 (-1.6979 1.8281)
R2^2/D10^2 : 6.21243E-02 (-0.0523555 0.050367)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.07 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Reduced chi-squared = 1.001 for 55 degrees of freedom
# Null hypothesis probability = 4.688151e-01
# Null hypothesis probability = 4.719242e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.920e-07 1.427e-07
25- 50 3.079e-07 1.899e-07
50-150 6.245e-08 4.629e-08
15-150 6.623e-07 3.484e-07
Plot creation:
Sun Aug 7 14:50:50 EDT 2016