batgrbproduct Analysis for Trigger=718655
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 Oct 23 08:35:17 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger718655/GCN5_download_cron
======================================================================
Trigger: 00718655 Segment: 000
BAT Trigger Time: 498797037.184 [s; MET]
Trigger Stop: 498797045.376 [s; MET]
UTC: 2016-10-22T02:43:40.140580 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 128.967479986496 Dec: 54.3649243512647 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.95
Image Trigger?: NO
Rate S/N Ratio: 15.6524758424985 [ if not an image trigger ]
Image S/N Ratio: 7.95
Flight Position: [ source = BAT ]
RA: 128.967479986496 Dec: 54.3649243512647 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 128.9882231592 Dec: 54.3651301779582 [deg; J2000]
{ 08h 35m 57.2s , +54d 21' 54.5" }
+/- 2.07105726666589 [arcmin] (estimated 90% radius based on SNR)
+/- 1.15817608840771 [arcmin] (formal 1-sigma fit error)
SNR: 10.7501709125608
Angular difference between Flight and Ground position is 0.725227 arcmin
Partial Coding Fraction: 0.1445312 [ including projection effects ]
Duration
T90: 7.24800002574921 +/- 1.04000002145767
Measured from: 0.784000098705292
to: 8.0320001244545 [s; relative to TRIGTIME]
T50: 4.16000002622604 +/- 0.857606003391192
Measured from: 2.14400011301041
to: 6.30400013923645 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.13199996948242
to: 3.13199996948242 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.527999997138977
to: 8.24000000953674 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.167439 0.337747 0.388989 0.082792
0.043350 0.046292 0.041637 0.034719 [error]
Peak 0.040171 0.040095 0.106013 0.022777
0.015421 0.016928 0.016261 0.012814 [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 6.61e-08 1.51e-07 2.75e-07 1.19e-06 7.48e-07 1.68e-06 erg/cm2
Error 1.73e-08 2.47e-08 3.82e-08 3.58e-07 1.00e-07 3.76e-07 erg/cm2
Peak flux Power-law 4.65e-01 5.12e-01 4.03e-01 5.22e-01 1.57e+00 1.90e+00 ph/cm2/s
Error 2.11e-01 1.55e-01 1.02e-01 2.44e-01 4.30e-01 4.67e-01 ph/cm2/s
Fluence Cutoff-PL 4.66e-08 1.65e-07 3.16e-07 3.14e-07 7.09e-07 8.42e-07 erg/cm2
Error 2.08e-08 2.98e-08 4.98e-08 3.24e-07 1.08e-07 3.29e-07 erg/cm2
Peak flux Cutoff-PL 1.30e-01 4.77e-01 6.16e-01 1.73e-01 1.37e+00 1.40e+00 ph/cm2/s
Error 2.24e-01 2.12e-01 1.98e-01 1.72e-01 4.46e-01 4.33e-01 ph/cm2/s
Fluence Band 4.00e-08 1.72e-07 3.01e-07 6.62e-07 7.12e-07 1.18e-06 erg/cm2
Error 2.09e-08 3.54e-08 -------- -------- 1.04e-07 -------- erg/cm2
Peak flux Band -------- -------- -------- 1.74e-01 -------- 1.40e+00 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 1.140 0.213 - - 9.39e-03 1.26e-03 65.220 57
CPL -0.260 1.221 92.0 60.1 3.94e-02 7.54e-02 59.630 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.348 0.361 - - 1.31e-02 3.27e-03 58.460 57
CPL -2.091 4.288 78.9 33.4 2.54e-01 1.01e+01 53.620 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: 11.200000 sec.
T50 in the 50-300 keV band: 4.032000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 7.712 0.528 8.240
T90 7.248 0.784 8.032
T50 4.160 2.144 6.304
Peak 1.000 2.132 3.132
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
128.9882 +54.3651 0.0178 45.2 144.0 1.0892 10.8 TRIG_00718655
------------------------------------------
Foreground time interval of the image:
0.528 8.240 (delta_t = 7.712 [sec])
Background time interval of the image:
-123.683 0.528 (delta_t = 124.211 [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 0.528 sec. to 8.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13988 ( -0.217675 0.208489 )
Norm@50keV : 9.38996E-03 ( -0.00126389 0.00125617 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.22 using 59 PHA bins.
# Reduced chi-squared = 1.144 for 57 degrees of freedom
# Null hypothesis probability = 2.124811e-01
Photon flux (15-150 keV) in 7.712 sec: 1.09381 ( -0.154451 0.155744 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.47754e-07 ( -1.0014e-07 1.00379e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.528 sec. to 8.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.260185 ( -1.3957 1.04699 )
Epeak [keV] : 92.0245 ( -20.919 99.2056 )
Norm@50keV : 3.93894E-02 ( -0.0393899 0.111335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.63 using 59 PHA bins.
# Reduced chi-squared = 1.065 for 56 degrees of freedom
# Null hypothesis probability = 3.449443e-01
Photon flux (15-150 keV) in 7.712 sec: 1.03739 ( -0.159571 0.16119 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.08937e-07 ( -1.08165e-07 1.07494e-07 ) ergs/cm2
Band function
Time interval is from 0.528 sec. to 8.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.994083 ( -1.64229 -1.01881 )
beta : -1.81968 ( 1.81767 0.578012 )
Epeak [keV] : 71.2395 ( -27.5171 81.2425 )
Norm@50keV : 9.85132E-02 ( -0.108679 10.531 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.79 using 59 PHA bins.
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Null hypothesis probability = 3.383518e-01
Photon flux (15-150 keV) in 7.712 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.12476e-07 ( -7.12422e-07 -1.04134e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.8297 (-2.64431 3.28806)
R^2/D10^2 : 5.52951E-02 (-0.0225672 0.0350355)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.84 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.073594e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.243e-08 8.263e-09
25- 50 1.606e-07 3.474e-08
50-150 4.677e-07 9.841e-08
15-150 6.608e-07 1.140e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.6997 -200)
Norm : 4.73418 (-0.634858 0.634858)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.31 using 59 PHA bins.
# Reduced chi-squared = 1.304 for 57 degrees of freedom
# Null hypothesis probability = 6.151122e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.089e-08 5.105e-08
25- 50 1.748e-07 9.713e-08
50-150 3.834e-07 2.119e-07
15-150 6.491e-07 3.593e-07
Double BB
R1^2/D10^2 : 9.30193E-02 (-0.0541888 2.67891)
kT2 [keV] : 199.782 (-199.782 -199.782)
R2^2/D10^2 : 9.00151E-05 (-8.15136e-05 -9.00151e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.70 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.68 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.64 using 59 PHA bins.
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.067 for 55 degrees of freedom
# Reduced chi-squared = 1.066 for 55 degrees of freedom
# Null hypothesis probability = 3.415208e-01
# Null hypothesis probability = 3.422653e-01
# Null hypothesis probability = 3.436247e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.094e-08 2.459e-08
25- 50 1.727e-07 1.026e-07
50-150 4.954e-07 2.663e-07
15-150 7.091e-07 3.703e-07
Peak spectrum fit
Power-law model
Time interval is from 2.132 sec. to 3.132 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34754 ( -0.367183 0.355311 )
Norm@50keV : 1.30686E-02 ( -0.00328738 0.00326024 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.215354e-01
Photon flux (15-150 keV) in 1 sec: 1.57362 ( -0.427185 0.432872 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27709e-07 ( -3.15006e-08 3.15083e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.132 sec. to 3.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.09127 ( -5.75383 2.82249 )
Epeak [keV] : 78.8787 ( -13.445 53.4039 )
Norm@50keV : 0.253845 ( -0.257828 19.9148 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.62 using 59 PHA bins.
# Reduced chi-squared = 0.9576 for 56 degrees of freedom
# Null hypothesis probability = 5.653644e-01
Photon flux (15-150 keV) in 1 sec: 1.36946 ( -0.413586 0.47742 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30411e-07 ( -3.37178e-08 3.2837e-08 ) ergs/cm2
Band function
Time interval is from 2.132 sec. to 3.132 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.02275 ( -2.61944 -2.02527 )
beta : -9.37167 ( 9.37167 19.3715 )
Epeak [keV] : 79.2359 ( -22.0708 46.6531 )
Norm@50keV : 0.239305 ( -0.240983 5.64808 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.63 using 59 PHA bins.
# Reduced chi-squared = 0.9750 for 55 degrees of freedom
# Null hypothesis probability = 5.272749e-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] : 20.6810 (-3.68082 4.76211)
R^2/D10^2 : 7.30036E-02 (-0.0393992 0.0728066)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.54 using 59 PHA bins.
# Reduced chi-squared = 0.9393 for 57 degrees of freedom
# Null hypothesis probability = 6.057511e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.937e-09 2.876e-09
25- 50 3.023e-08 1.264e-08
50-150 9.622e-08 3.907e-08
15-150 1.324e-07 4.740e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-79.8247 -199.363)
Norm : 6.91038 (-1.70239 1.70247)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.93 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.046195e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.721e-08 1.047e-08
25- 50 3.310e-08 1.967e-08
50-150 7.260e-08 4.322e-08
15-150 1.229e-07 7.295e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.35406 (-2.33311 8.05199)
R1^2/D10^2 : 233.087 (-343.629 3.7446e+06)
kT2 [keV] : 21.5568 (-3.97941 5.34513)
R2^2/D10^2 : 6.10274E-02 (-0.0355897 0.0528883)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.93 using 59 PHA bins.
# Reduced chi-squared = 0.9260 for 55 degrees of freedom
# Null hypothesis probability = 6.308908e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.346e-08 6.449e-09
25- 50 2.814e-08 1.420e-08
50-150 9.599e-08 4.886e-08
15-150 1.376e-07 5.897e-08
Plot creation:
Sun Oct 23 08:41:31 EDT 2016