batgrbproduct Analysis for Trigger=709907
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): Sat Aug 27 11:46:31 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger709907/GCN5_download_cron
======================================================================
Trigger: 00709907 Segment: 000
BAT Trigger Time: 493884775.04 [s; MET]
Trigger Stop: 493884787.2 [s; MET]
UTC: 2016-08-26T06:12:38.274100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 183.073929859613 Dec: -67.6888587210817 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.26
Image Trigger?: NO
Rate S/N Ratio: 10.4403065089106 [ if not an image trigger ]
Image S/N Ratio: 9.26
Flight Position: [ source = BAT ]
RA: 183.073929859613 Dec: -67.6888587210817 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 183.11924102827 Dec: -67.6639201652418 [deg; J2000]
{ 12h 12m 28.6s , -67d 39' 50.1" }
+/- 2.63689595465282 [arcmin] (estimated 90% radius based on SNR)
+/- 1.32069877700961 [arcmin] (formal 1-sigma fit error)
SNR: 7.61301981302141
Angular difference between Flight and Ground position is 1.818055 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 52.5959998965263 +/- 14.4391317781664
Measured from: 4.76800012588501
to: 57.3640000224113 [s; relative to TRIGTIME]
T50: 24.9519999623299 +/- 12.6997454824912
Measured from: 8.92800009250641
to: 33.8800000548363 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.63999998569489
to: 5.63999998569489 [s; relative to TRIGTIME]
Total Fluence
Measured from: 3.84799998998642
to: 61.5759999752045 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.280432 0.292229 0.208210 0.114745
0.046594 0.046858 0.040124 0.035570 [error]
Peak -0.000102 0.029095 0.024788 0.003568
0.006198 0.006314 0.005428 0.004777 [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 6.81e-08 1.22e-07 1.69e-07 4.84e-07 4.86e-07 8.43e-07 erg/cm2
Error 1.77e-08 2.00e-08 3.86e-08 2.36e-07 9.22e-08 2.69e-07 erg/cm2
Peak flux Power-law 1.07e-01 1.38e-01 1.30e-01 2.16e-01 4.47e-01 5.91e-01 ph/cm2/s
Error 5.92e-02 4.87e-02 4.10e-02 1.42e-01 1.35e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 6.73e-08 1.24e-07 1.70e-07 3.90e-07 4.82e-07 7.45e-07 erg/cm2
Error 1.91e-08 2.33e-08 3.98e-08 4.22e-07 9.98e-08 3.61e-07 erg/cm2
Peak flux Cutoff-PL 7.75e-02 1.58e-01 1.47e-01 5.13e-02 4.22e-01 4.34e-01 ph/cm2/s
Error 6.32e-02 6.40e-02 5.32e-02 -------- 1.36e-01 2.01e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 7.10e-02 1.93e-01 1.37e-01 1.27e-01 4.55e-01 5.28e-01 ph/cm2/s
Error -------- 6.67e-02 4.58e-02 -------- 1.26e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.537 0.289 - - 8.93e-04 1.53e-04 71.710 57
CPL 1.434 0.000 260.0 0.0 1.01e-03 0.00e+00 71.680 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.086 0.481 - - 3.86e-03 1.13e-03 69.210 57
CPL -0.590 3.199 78.8 -27.4 2.59e-02 9.34e-01 67.360 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: 16.320000 sec.
T50 in the 50-300 keV band: 8.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 57.728 3.848 61.576
T90 52.596 4.768 57.364
T50 24.952 8.928 33.880
Peak 1.000 4.640 5.640
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
183.1192 -67.6639 0.0252 8.0 -174.4 0.7525 7.6 TRIG_00709907
------------------------------------------
Foreground time interval of the image:
3.848 56.061 (delta_t = 52.213 [sec])
Background time interval of the image:
-186.539 3.848 (delta_t = 190.387 [sec])
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 3.848 sec. to 61.576 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53664 ( -0.285695 0.291498 )
Norm@50keV : 8.93241E-04 ( -0.000154174 0.000151292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.71 using 59 PHA bins.
# Reduced chi-squared = 1.258 for 57 degrees of freedom
# Null hypothesis probability = 9.078227e-02
Photon flux (15-150 keV) in 57.73 sec: 0.112647 ( -0.0181115 0.0181284 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86403e-07 ( -9.10858e-08 9.3257e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.848 sec. to 61.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.43403 ( )
Epeak [keV] : 259.976 ( )
Norm@50keV : 1.01359E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.68 using 59 PHA bins.
# Reduced chi-squared = 1.280 for 56 degrees of freedom
# Null hypothesis probability = 7.721093e-02
Photon flux (15-150 keV) in 57.73 sec: 0.112159 ( -0.018654 0.018468 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.81642e-07 ( -1.02674e-07 9.70031e-08 ) ergs/cm2
Band function
Time interval is from 3.848 sec. to 61.576 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.44286 ( -2.18354 0.552626 )
beta : -9.25173 ( 8.99601 18.996 )
Epeak [keV] : 250.811 ( -250.811 -250.811 )
Norm@50keV : 1.00065E-03 ( -0.00016169 0.000916372 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.70 using 59 PHA bins.
# Reduced chi-squared = 1.304 for 55 degrees of freedom
# Null hypothesis probability = 6.462132e-02
Photon flux (15-150 keV) in 57.73 sec: 0.111674 ( ) 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] : 13.3240 (-2.77094 3.79495)
R^2/D10^2 : 1.88115E-02 (-0.0109467 0.0244409)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.92 using 59 PHA bins.
# Reduced chi-squared = 1.455 for 57 degrees of freedom
# Null hypothesis probability = 1.410249e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.086e-08 1.241e-08
25- 50 1.445e-07 4.136e-08
50-150 1.645e-07 5.652e-08
15-150 3.498e-07 9.243e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-107.203 -199.363)
Norm : 0.458544 (-0.0732252 0.0733001)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.77 using 59 PHA bins.
# Reduced chi-squared = 1.259 for 57 degrees of freedom
# Null hypothesis probability = 9.005715e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.592e-08 3.845e-08
25- 50 1.268e-07 7.159e-08
50-150 2.781e-07 1.591e-07
15-150 4.708e-07 2.683e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.80784 (-2.69683 3.41085)
R1^2/D10^2 : 0.143615 (-0.105837 0.768664)
kT2 [keV] : 28.8988 (-11.4628 66.0691)
R2^2/D10^2 : 1.01865E-03 (-0.000978113 0.00435724)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.25 using 59 PHA bins.
# Reduced chi-squared = 1.296 for 55 degrees of freedom
# Null hypothesis probability = 6.927940e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.778e-08 3.827e-08
25- 50 1.254e-07 6.691e-08
50-150 2.971e-07 1.654e-07
15-150 4.903e-07 2.599e-07
Peak spectrum fit
Power-law model
Time interval is from 4.640 sec. to 5.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08647 ( -0.501799 0.460439 )
Norm@50keV : 3.86010E-03 ( -0.0011362 0.00113184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.21 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.287732e-01
Photon flux (15-150 keV) in 1 sec: 0.447168 ( -0.134228 0.135539 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.05365e-08 ( -1.25029e-08 1.27433e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.640 sec. to 5.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.590371 ( -3.54529 2.85301 )
Epeak [keV] : 78.7921 ( -23.9909 -78.7681 )
Norm@50keV : 2.58574E-02 ( -0.0258742 1.84273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.36 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 56 degrees of freedom
# Null hypothesis probability = 1.422779e-01
Photon flux (15-150 keV) in 1 sec: 0.422113 ( -0.134177 0.138593 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.57871e-08 ( -1.34598e-08 1.43306e-08 ) ergs/cm2
Band function
Time interval is from 4.640 sec. to 5.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5.97821 -5 )
beta : -1.77764 ( -1.13625 0.75966 )
Epeak [keV] : 41.1988 ( -10.5012 11.7518 )
Norm@50keV : 19.8837 ( -5.42218 84.3805 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.75 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 55 degrees of freedom
# Null hypothesis probability = 1.728774e-01
Photon flux (15-150 keV) in 1 sec: 0.455360 ( 6.54464 -0.124147 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.9251e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.8622 (-5.13718 8.55248)
R^2/D10^2 : 3.18935E-02 (-0.0318657 0.0687106)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.76 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.556680e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.042e-09 1.294e-09
25- 50 9.391e-09 5.650e-09
50-150 2.171e-08 1.350e-08
15-150 3.314e-08 2.082e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-96.5535 -199.363)
Norm : 1.86259 (-0.560653 0.560653)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.26 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 57 degrees of freedom
# Null hypothesis probability = 9.696486e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.638e-09 2.917e-09
25- 50 8.922e-09 5.430e-09
50-150 1.957e-08 1.184e-08
15-150 3.313e-08 1.986e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.00000E-04 (-0.0001 -0.0001)
R1^2/D10^2 : 1.16223E+08 (-1.16223e+08 -1.16223e+08)
kT2 [keV] : 17.8679 (-5.13877 8.55084)
R2^2/D10^2 : 3.18605E-02 (-0.0318563 0.0687179)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.92 using 59 PHA bins.
#Fit statistic : Chi-Squared = 67.76 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 55 degrees of freedom
# Reduced chi-squared = 1.232 for 55 degrees of freedom
# Null hypothesis probability = 1.132962e-01
# Null hypothesis probability = 1.157872e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.326e-09 3.357e+03
25- 50 1.002e-08 3.245e+04
50-150 1.912e-08 7.150e+05
15-150 3.146e-08 7.680e+05
Plot creation:
Sat Aug 27 11:51:09 EDT 2016