batgrbproduct Analysis for Trigger=709765
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): Thu Aug 25 17:27:33 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger709765/GCN5_download_cron
======================================================================
Trigger: 00709765 Segment: 000
BAT Trigger Time: 493773762.112 [s; MET]
Trigger Stop: 493773764.16 [s; MET]
UTC: 2016-08-24T23:22:25.352360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 80.0777395894866 Dec: 40.040385833891 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.84
Image Trigger?: NO
Rate S/N Ratio: 18.4390889145858 [ if not an image trigger ]
Image S/N Ratio: 8.84
Flight Position: [ source = BAT ]
RA: 80.0777395894866 Dec: 40.040385833891 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 80.0867206067146 Dec: 40.0393447250267 [deg; J2000]
{ 05h 20m 20.8s , +40d 02' 21.6" }
+/- 1.18594126504943 [arcmin] (estimated 90% radius based on SNR)
+/- 0.489960840670658 [arcmin] (formal 1-sigma fit error)
SNR: 23.84041637645
Angular difference between Flight and Ground position is 0.417253 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 99.3279999494553 +/- 7.84555718933669
Measured from: 1.34000015258789
to: 100.668000102043 [s; relative to TRIGTIME]
T50: 41.7199999690056 +/- 14.7638748129724
Measured from: 8.09200012683868
to: 49.8120000958443 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.88400000333786
to: 5.88400000333786 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.659999966621399
to: 111.576000034809 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.310387 1.484945 1.089975 0.264190
0.075731 0.078538 0.068076 0.057704 [error]
Peak 0.048220 0.050658 0.052499 0.025763
0.008785 0.009812 0.009215 0.007369 [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 4.00e-07 6.76e-07 8.71e-07 2.26e-06 2.57e-06 4.20e-06 erg/cm2
Error 4.01e-08 4.04e-08 6.98e-08 3.92e-07 1.64e-07 4.44e-07 erg/cm2
Peak flux Power-law 3.82e-01 4.31e-01 3.47e-01 4.66e-01 1.33e+00 1.63e+00 ph/cm2/s
Error 1.24e-01 8.44e-02 7.54e-02 2.18e-01 2.36e-01 3.01e-01 ph/cm2/s
Fluence Cutoff-PL 4.01e-07 6.80e-07 8.74e-07 2.08e-06 2.56e-06 4.03e-06 erg/cm2
Error 4.21e-08 4.35e-08 7.18e-08 5.24e-07 1.73e-07 7.15e-07 erg/cm2
Peak flux Cutoff-PL 3.90e-01 4.33e-01 3.44e-01 4.50e-01 1.33e+00 1.62e+00 ph/cm2/s
Error 1.00e-01 7.03e-02 7.57e-02 2.67e-01 2.36e-01 3.24e-01 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 1.635 0.107 - - 2.47e-03 1.48e-04 68.250 57
CPL 1.638 0.108 9999.4 -0.0 2.47e-03 8.85e-04 68.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.310 0.320 - - 1.11e-02 1.96e-03 68.850 57
CPL 1.316 0.322 9999.3 0.0 1.11e-02 8.95e-03 68.860 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: 37.440000 sec.
T50 in the 50-300 keV band: 23.680000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 112.236 -0.660 111.576
T90 99.328 1.340 100.668
T50 41.720 8.092 49.812
Peak 1.000 4.884 5.884
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
80.0867 +40.0393 0.0081 31.1 35.2 2.3474 23.8 TRIG_00709765
------------------------------------------
Foreground time interval of the image:
-0.660 28.689 (delta_t = 29.349 [sec])
Background time interval of the image:
-146.911 -0.660 (delta_t = 146.251 [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
Multiple GTIs in the spectrum
tstart tstop
-0.660000 76.198000
76.888000 111.576000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63529 ( -0.106522 0.107417 )
Norm@50keV : 2.47244E-03 ( -0.000148088 0.000147322 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 57 degrees of freedom
# Null hypothesis probability = 1.461826e-01
Photon flux (15-150 keV) in 111.5 sec: 0.321291 ( -0.0190955 0.019145 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.5678e-06 ( -1.63918e-07 1.64871e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.660000 76.198000
76.888000 111.576000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63765 ( -0.109761 0.105575 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 2.47405E-03 ( -0.000539333 0.00123105 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.26 using 59 PHA bins.
# Reduced chi-squared = 1.219 for 56 degrees of freedom
# Null hypothesis probability = 1.260769e-01
Photon flux (15-150 keV) in 111.5 sec: 0.321277 ( -0.010048 0.018824 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55841e-06 ( -1.68789e-07 1.76248e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.660000 76.198000
76.888000 111.576000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96949 ( -4.96949 -4.96949 )
beta : -1.65338 ( -0.113077 0.110514 )
Epeak [keV] : 19.8578 ( -19.8578 4.70945 )
Norm@50keV : 1183.86 ( -67.5079 1.48774e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.70 using 59 PHA bins.
# Reduced chi-squared = 1.231 for 55 degrees of freedom
# Null hypothesis probability = 1.169013e-01
Photon flux (15-150 keV) in 111.5 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] : 13.9578 ( )
R^2/D10^2 : 4.39597E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 159.61 using 59 PHA bins.
# Reduced chi-squared = 2.8002 for 57 degrees of freedom
# Null hypothesis probability = 1.169027e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.018e-07 2.275e-08
25- 50 7.482e-07 5.659e-08
50-150 9.583e-07 1.153e-07
15-150 1.908e-06 1.433e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 170.647 (-44.5012 -169.868)
Norm : 1.29971 (-0.0841308 0.0950144)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.08 using 59 PHA bins.
# Reduced chi-squared = 1.247 for 57 degrees of freedom
# Null hypothesis probability = 9.936273e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.676e-07 2.888e-08
25- 50 6.937e-07 1.234e-07
50-150 1.440e-06 5.746e-07
15-150 2.502e-06 6.969e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.32972 (-1.07592 1.25065)
R1^2/D10^2 : 0.538555 (-0.25303 0.552435)
kT2 [keV] : 26.2715 (-4.46776 7.28128)
R2^2/D10^2 : 3.77784E-03 (-0.00212878 0.00362042)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.15 using 59 PHA bins.
# Reduced chi-squared = 1.275 for 55 degrees of freedom
# Null hypothesis probability = 8.200193e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.930e-07 7.855e-08
25- 50 6.703e-07 1.092e-07
50-150 1.494e-06 3.201e-07
15-150 2.557e-06 4.404e-07
Peak spectrum fit
Power-law model
Time interval is from 4.884 sec. to 5.884 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30993 ( -0.320365 0.319784 )
Norm@50keV : 1.11399E-02 ( -0.00196382 0.00195509 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.85 using 59 PHA bins.
# Reduced chi-squared = 1.208 for 57 degrees of freedom
# Null hypothesis probability = 1.350617e-01
Photon flux (15-150 keV) in 1 sec: 1.33148 ( -0.236083 0.23667 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09818e-07 ( -2.18565e-08 2.21462e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.884 sec. to 5.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31608 ( -0.331554 0.312672 )
Epeak [keV] : 9999.34 ( -9999.36 -9999.36 )
Norm@50keV : 1.11348E-02 ( -0.0019672 0.0159248 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.86 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 56 degrees of freedom
# Null hypothesis probability = 1.160016e-01
Photon flux (15-150 keV) in 1 sec: 1.33403 ( -0.23754 0.23401 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.09911e-07 ( -2.19207e-08 2.1689e-08 ) ergs/cm2
Band function
Time interval is from 4.884 sec. to 5.884 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98961 ( -4.98961 -4.98961 )
beta : -1.34761 ( -0.378572 0.339153 )
Epeak [keV] : 21.7316 ( -21.7316 10.4109 )
Norm@50keV : 2315.31 ( -402.76 5.19073e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.71 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 55 degrees of freedom
# Null hypothesis probability = 1.012849e-01
Photon flux (15-150 keV) in 1 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] : 17.0897 (-3.97608 5.61986)
R^2/D10^2 : 9.80416E-02 (-0.0597591 0.140449)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.74 using 59 PHA bins.
# Reduced chi-squared = 1.416 for 57 degrees of freedom
# Null hypothesis probability = 2.098489e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.823e-09 2.231e-09
25- 50 2.587e-08 8.880e-09
50-150 5.404e-08 2.035e-08
15-150 8.574e-08 2.508e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.8693 -200)
Norm : 5.46222 (-0.963799 0.963799)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.17 using 59 PHA bins.
# Reduced chi-squared = 1.249 for 57 degrees of freedom
# Null hypothesis probability = 9.816435e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-08 7.885e-09
25- 50 2.616e-08 1.495e-08
50-150 5.739e-08 3.278e-08
15-150 9.715e-08 5.545e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.99184 (-3.3072 8.8694)
R1^2/D10^2 : 1.44156 (-1.23042 15.1734)
kT2 [keV] : 37.7911 (-18.434 -38.5314)
R2^2/D10^2 : 6.52161E-03 (-0.00583684 0.0444365)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.46 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.082694e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.256e-08 7.305e-09
25- 50 2.384e-08 1.295e-08
50-150 7.716e-08 4.386e-08
15-150 1.136e-07 5.930e-08
Plot creation:
Thu Aug 25 17:33:29 EDT 2016