batgrbproduct analysis for trigger=760835
batgrbproduct Analysis for Trigger=760835
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): Sun Jul 9 00:15:44 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger760835/GCN5_download_cron
======================================================================
Trigger: 00760835 Segment: 000
BAT Trigger Time: 521174064 [s; MET]
Trigger Stop: 521174760 [s; MET]
UTC: 2017-07-08T02:34:04.665000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 259.916172690703 Dec: -25.0266022608835 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 10.98
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.98
Flight Position: [ source = BAT ]
RA: 259.916172690703 Dec: -25.0266022608835 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 259.872040235476 Dec: -25.0000494121091 [deg; J2000]
{ 17h 19m 29.3s , -25d 00' 00.2" }
+/- 2.55907191806202 [arcmin] (estimated 90% radius based on SNR)
+/- 1.23646064096833 [arcmin] (formal 1-sigma fit error)
SNR: 7.94590544433649
Angular difference between Flight and Ground position is 2.880321 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 696 +/-
Measured from: 0
to: 696 [s; relative to TRIGTIME]
T50: 696 +/-
Measured from: 0
to: 696 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 696 second)
Measured from: 0
to: 696 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 696 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.751091 1.769174 0.902628 0.030033
0.180003 0.165687 0.141475 0.126129 [error]
Peak 1.751091 1.769174 0.902628 0.030033
0.180003 0.165687 0.141475 0.126129 [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 5.15e-07 7.16e-07 7.37e-07 1.39e-06 2.41e-06 3.36e-06 erg/cm2
Error 7.96e-08 7.61e-08 1.34e-07 5.06e-07 3.08e-07 6.48e-07 erg/cm2
Peak flux Power-law 2.66e-02 2.04e-02 1.05e-02 7.79e-03 6.11e-02 6.53e-02 ph/cm2/s
Error 4.19e-03 2.16e-03 1.85e-03 2.64e-03 6.50e-03 6.97e-03 ph/cm2/s
Fluence Cutoff-PL 4.94e-07 7.60e-07 7.13e-07 5.55e-07 2.27e-06 2.52e-06 erg/cm2
Error 8.71e-08 1.02e-07 1.57e-07 6.45e-07 3.68e-07 9.54e-07 erg/cm2
Peak flux Cutoff-PL 2.53e-02 2.16e-02 1.03e-02 3.74e-03 5.97e-02 6.10e-02 ph/cm2/s
Error 4.64e-03 2.86e-03 2.10e-03 4.93e-03 6.81e-03 8.50e-03 ph/cm2/s
Fluence Band 5.01e-07 7.55e-07 6.92e-07 1.11e-06 2.34e-06 3.08e-06 erg/cm2
Error -------- 9.09e-08 -------- -------- -------- -------- erg/cm2
Peak flux Band 2.54e-02 2.15e-02 1.04e-02 4.13e-03 5.99e-02 6.14e-02 ph/cm2/s
Error 4.53e-03 -------- -------- -------- 6.81e-03 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.958 0.203 - - 4.15e-04 5.47e-05 63.800 57
CPL 1.453 0.869 44.3 0.0 8.18e-04 0.00e+00 62.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.958 0.203 - - 4.15e-04 5.47e-05 63.800 57
CPL 1.453 0.869 44.3 -1.8 8.18e-04 1.38e-03 62.590 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 696.000 0.000 696.000
T90 696.000 0.000 696.000
T50 696.000 0.000 696.000
Peak 696.000 0.000 696.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
259.8720 -25.0000 0.0242 17.9 58.9 4.7647 7.9 TRIG_00760835
------------------------------------------
Foreground time interval of the image:
0.000 32.000 (delta_t = 32.000 [sec])
60.000 122.000 (delta_t = 62.000 [sec])
159.000 696.000 (delta_t = 537.000 [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 32.000000
60.000000 122.000000
159.000000 696.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95824 ( -0.198563 0.207387 )
Norm@50keV : 4.14838E-04 ( -5.52853e-05 5.41247e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.80 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.499403e-01
Photon flux (15-150 keV) in 631 sec: 6.10609E-02 ( -0.00650256 0.00650558 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40956e-06 ( -3.04108e-07 3.1135e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 32.000000
60.000000 122.000000
159.000000 696.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45306 ( -0.976852 0.760936 )
Epeak [keV] : 44.3151 ( )
Norm@50keV : 8.18088E-04 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 56 degrees of freedom
# Null hypothesis probability = 2.537914e-01
Photon flux (15-150 keV) in 631 sec: 5.97128E-02 ( -0.0068143 0.0068144 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26814e-06 ( -3.58793e-07 3.7677e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 32.000000
60.000000 122.000000
159.000000 696.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45309 ( -3.78074 0.981353 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 44.3080 ( -17.272 -44.308 )
Norm@50keV : 8.17909E-04 ( -0.000439054 0.00226665 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.247971e-01
Photon flux (15-150 keV) in 631 sec: 5.98849E-02 ( 6.94012 -0.0069866 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.33957e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.71343 (-1.19806 1.40232)
R^2/D10^2 : 3.13075E-02 (-0.0127162 0.020943)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.53 using 59 PHA bins.
# Reduced chi-squared = 1.378 for 57 degrees of freedom
# Null hypothesis probability = 3.087933e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.756e-07 6.878e-08
25- 50 8.957e-07 1.230e-07
50-150 4.295e-07 1.340e-07
15-150 1.701e-06 2.549e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 68.9239 (-20.2287 35.4781)
Norm : 0.301059 (-0.0498735 0.060211)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.63 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.834634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.866e-07 7.051e-08
25- 50 7.709e-07 9.844e-08
50-150 9.787e-07 3.301e-07
15-150 2.236e-06 3.370e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27142 (-2.2538 2.41834)
R1^2/D10^2 : 0.203267 (-0.0793402 0.322243)
kT2 [keV] : 16.4028 (-7.4193 21.9034)
R2^2/D10^2 : 2.85983E-03 (-0.000959163 0.00508259)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.26 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.077567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.834e-07 2.770e-07
25- 50 7.137e-07 3.821e-07
50-150 8.289e-07 4.934e-07
15-150 2.026e-06 1.098e-06
Peak spectrum fit
Power-law model
Time interval is from 159.000 sec. to 696.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95824 ( -0.198563 0.207387 )
Norm@50keV : 4.14838E-04 ( -5.52853e-05 5.41247e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.80 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 57 degrees of freedom
# Null hypothesis probability = 2.499403e-01
Photon flux (15-150 keV) in 631 sec: 6.10609E-02 ( -0.00650256 0.00650558 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.40956e-06 ( -3.04108e-07 3.1135e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 159.000 sec. to 696.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45306 ( -0.976852 0.760936 )
Epeak [keV] : 44.3151 ( -40.6939 -44.3153 )
Norm@50keV : 8.18088E-04 ( -0.00050079 0.00226411 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 56 degrees of freedom
# Null hypothesis probability = 2.537914e-01
Photon flux (15-150 keV) in 631 sec: 5.97128E-02 ( -0.0068143 0.0068144 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26814e-06 ( -3.58793e-07 3.7677e-07 ) ergs/cm2
Band function
Time interval is from 159.000 sec. to 696.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.45309 ( -3.78074 0.981353 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 44.3080 ( -17.1474 -44.308 )
Norm@50keV : 8.17909E-04 ( -0.000439054 0.00226665 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.247971e-01
Photon flux (15-150 keV) in 631 sec: 5.98849E-02 ( 6.94012 -0.0069866 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.33957e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.71343 (-1.19806 1.40232)
R^2/D10^2 : 3.13075E-02 (-0.0127162 0.020943)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.53 using 59 PHA bins.
# Reduced chi-squared = 1.378 for 57 degrees of freedom
# Null hypothesis probability = 3.087933e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.756e-07 7.238e-08
25- 50 8.957e-07 1.205e-07
50-150 4.295e-07 1.200e-07
15-150 1.701e-06 2.590e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 68.9239 (-20.2287 35.4781)
Norm : 0.301059 (-0.0498735 0.060211)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.63 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.834634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.866e-07 7.203e-08
25- 50 7.709e-07 1.013e-07
50-150 9.787e-07 2.999e-07
15-150 2.236e-06 3.373e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27142 (-2.2538 2.41834)
R1^2/D10^2 : 0.203267 (-0.0793402 0.322243)
kT2 [keV] : 16.4028 (-7.4193 21.9034)
R2^2/D10^2 : 2.85983E-03 (-0.000959163 0.00508259)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.26 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.077567e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.834e-07 2.758e-07
25- 50 7.137e-07 3.919e-07
50-150 8.289e-07 4.953e-07
15-150 2.026e-06 1.077e-06
Plot creation:
Sun Jul 9 00:24:18 EDT 2017