batgrbproduct Analysis for Trigger=713782
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): Wed Sep 28 18:34:24 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger713782/GCN5_download_cron
======================================================================
Trigger: 00713782 Segment: 000
BAT Trigger Time: 496692306.816 [s; MET]
Trigger Stop: 496692307.328 [s; MET]
UTC: 2016-09-27T18:04:49.891880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 256.263779819621 Dec: 17.3105803857182 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.56
Image Trigger?: NO
Rate S/N Ratio: 35.4400902933387 [ if not an image trigger ]
Image S/N Ratio: 7.56
Flight Position: [ source = BAT ]
RA: 256.263779819621 Dec: 17.3105803857182 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 256.267508228521 Dec: 17.333168601808 [deg; J2000]
{ 17h 05m 04.2s , +17d 19' 59.4" }
+/- 1.75676706486871 [arcmin] (estimated 90% radius based on SNR)
+/- 0.712040806272954 [arcmin] (formal 1-sigma fit error)
SNR: 13.5996174798082
Angular difference between Flight and Ground position is 1.372015 arcmin
Partial Coding Fraction: 0.5078125 [ including projection effects ]
Duration
T90: 0.483999967575073 +/- 0.0999999880790718
Measured from: 0.0400001406669617
to: 0.524000108242035 [s; relative to TRIGTIME]
T50: 0.231999933719635 +/- 0.0512249301536146
Measured from: 0.168000161647797
to: 0.400000095367432 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.226000010967255
to: 0.773999989032745 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.544000029563904 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.054969 0.056121 0.073777 0.041848
0.009027 0.008662 0.009208 0.007747 [error]
Peak 0.065906 0.076106 0.073945 0.041096
0.011752 0.010926 0.010692 0.009165 [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-08 2.77e-08 5.10e-08 2.25e-07 1.39e-07 3.15e-07 erg/cm2
Error 3.27e-09 4.43e-09 8.46e-09 8.77e-08 2.17e-08 9.25e-08 erg/cm2
Peak flux Power-law 5.31e-01 6.05e-01 4.94e-01 6.75e-01 1.88e+00 2.31e+00 ph/cm2/s
Error 1.47e-01 9.87e-02 8.64e-02 2.60e-01 2.73e-01 3.45e-01 ph/cm2/s
Fluence Cutoff-PL 1.20e-08 2.78e-08 5.09e-08 2.21e-07 1.38e-07 3.12e-07 erg/cm2
Error 2.79e-09 4.51e-09 8.79e-09 1.41e-07 2.17e-08 9.87e-08 erg/cm2
Peak flux Cutoff-PL 5.36e-01 6.07e-01 4.93e-01 6.62e-01 1.88e+00 2.30e+00 ph/cm2/s
Error 1.48e-01 9.81e-02 8.59e-02 2.42e-01 2.73e-01 3.99e-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 1.120 0.256 - - 2.45e-02 3.36e-03 37.580 57
CPL 1.115 0.564 10000.0 0.0 2.46e-02 0.00e+00 37.580 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.292 0.268 - - 1.58e-02 2.24e-03 44.950 57
CPL 1.288 0.500 9999.3 0.0 1.58e-02 0.00e+00 44.960 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: 0.448000 sec.
T50 in the 50-300 keV band: 0.256000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.544 0.000 0.544
T90 0.484 0.040 0.524
T50 0.232 0.168 0.400
Peak 1.000 -0.226 0.774
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
256.2675 +17.3332 0.0141 26.8 68.5 0.2432 13.6 TRIG_00713782
------------------------------------------
Foreground time interval of the image:
0.000 0.544 (delta_t = 0.544 [sec])
Background time interval of the image:
-239.816 0.000 (delta_t = 239.816 [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 0.000 sec. to 0.544 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11995 ( -0.257037 0.255187 )
Norm@50keV : 2.45137E-02 ( -0.0033599 0.00335957 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.58 using 59 PHA bins.
# Reduced chi-squared = 0.6593 for 57 degrees of freedom
# Null hypothesis probability = 9.780726e-01
Photon flux (15-150 keV) in 0.544 sec: 2.84919 ( -0.398843 0.399938 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38551e-07 ( -2.16058e-08 2.18634e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11510 ( -0.816133 0.312648 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.46422E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.58 using 59 PHA bins.
# Reduced chi-squared = 0.6711 for 56 degrees of freedom
# Null hypothesis probability = 9.721733e-01
Photon flux (15-150 keV) in 0.544 sec: 2.85043 ( -0.40093 0.39729 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38319e-07 ( -2.13373e-08 2.19716e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.544 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.845081 ( 0.841298 5.8255 )
beta : -1.12065 ( 1.12079 0.258034 )
Epeak [keV] : 81.0955 ( -81.9759 -81.9759 )
Norm@50keV : 4.19562E-02 ( -0.0208393 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.57 using 59 PHA bins.
# Reduced chi-squared = 0.6832 for 55 degrees of freedom
# Null hypothesis probability = 9.651098e-01
Photon flux (15-150 keV) in 0.544 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] : 20.2641 (-3.68215 4.85398)
R^2/D10^2 : 0.126421 (-0.0617646 0.112959)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.93 using 59 PHA bins.
# Reduced chi-squared = 0.8760 for 57 degrees of freedom
# Null hypothesis probability = 7.351086e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.415e-09 1.543e-09
25- 50 2.721e-08 6.343e-09
50-150 8.297e-08 2.094e-08
15-150 1.156e-07 2.783e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-43.3256 -200)
Norm : 11.5885 (-1.63606 1.63606)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.82 using 59 PHA bins.
# Reduced chi-squared = 0.8039 for 57 degrees of freedom
# Null hypothesis probability = 8.556435e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.570e-08 8.903e-09
25- 50 3.021e-08 1.691e-08
50-150 6.625e-08 3.664e-08
15-150 1.122e-07 6.215e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65791 (-3.0081 4.13862)
R1^2/D10^2 : 2.79416 (-2.48196 27.492)
kT2 [keV] : 32.1453 (-10.3292 -32.2282)
R2^2/D10^2 : 2.61279E-02 (-0.0255386 0.0647214)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.58 using 59 PHA bins.
# Reduced chi-squared = 0.7014 for 55 degrees of freedom
# Null hypothesis probability = 9.545616e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.245e-08 7.094e-09
25- 50 2.665e-08 1.422e-08
50-150 1.005e-07 5.718e-08
15-150 1.396e-07 7.450e-08
Peak spectrum fit
Power-law model
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29162 ( -0.268048 0.267408 )
Norm@50keV : 1.57567E-02 ( -0.00223887 0.00223488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.95 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 57 degrees of freedom
# Null hypothesis probability = 8.762095e-01
Photon flux (15-150 keV) in 1 sec: 1.87695 ( -0.272216 0.273198 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56026e-07 ( -2.50834e-08 2.54492e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28776 ( -0.730139 0.268978 )
Epeak [keV] : 9999.31 ( -9999.35 -9999.35 )
Norm@50keV : 1.58224E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.96 using 59 PHA bins.
# Reduced chi-squared = 0.8028 for 56 degrees of freedom
# Null hypothesis probability = 8.547652e-01
Photon flux (15-150 keV) in 1 sec: 1.87856 ( -0.27437 0.27079 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.55248e-07 ( -2.4313e-08 2.6264e-08 ) ergs/cm2
Band function
Time interval is from -0.226 sec. to 0.774 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.870287 ( 0.873608 5.80933 )
beta : -1.30522 ( 1.30428 0.279891 )
Epeak [keV] : 73.5037 ( -72.1489 -72.1489 )
Norm@50keV : 3.12915E-02 ( -0.0184285 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.93 using 59 PHA bins.
# Reduced chi-squared = 0.8169 for 55 degrees of freedom
# Null hypothesis probability = 8.317450e-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] : 16.4085 (-3.09541 4.16467)
R^2/D10^2 : 0.156851 (-0.0829117 0.161862)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.88 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 57 degrees of freedom
# Null hypothesis probability = 4.064840e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.680e-09 2.359e-09
25- 50 3.731e-08 8.955e-09
50-150 7.088e-08 2.109e-08
15-150 1.169e-07 2.670e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-59.4922 -200)
Norm : 7.72476 (-1.10501 1.10501)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.28 using 59 PHA bins.
# Reduced chi-squared = 0.8471 for 57 degrees of freedom
# Null hypothesis probability = 7.878230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.924e-08 1.099e-08
25- 50 3.700e-08 2.056e-08
50-150 8.116e-08 4.523e-08
15-150 1.374e-07 7.650e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.8595 (-3.63933 3.60168)
R1^2/D10^2 : 0.523918 (-0.373362 0.759246)
kT2 [keV] : 199.220 (-199.22 -199.22)
R2^2/D10^2 : 3.00665E-04 (-9.79563e-05 0.00169006)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.39 using 59 PHA bins.
#Fit statistic : Chi-Squared = 43.84 using 59 PHA bins.
# Reduced chi-squared = 0.8071 for 55 degrees of freedom
# Reduced chi-squared = 0.7970 for 55 degrees of freedom
# Null hypothesis probability = 8.462721e-01
# Null hypothesis probability = 8.602753e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.415e-08 8.380e-09
25- 50 3.790e-08 2.076e-08
50-150 1.011e-07 5.530e-08
15-150 1.532e-07 7.905e-08
Plot creation:
Wed Sep 28 18:39:41 EDT 2016