batgrbproduct analysis for trigger=779351
batgrbproduct Analysis for Trigger=779351
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): Tue Oct 17 07:13:30 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger779351/GCN5_download_cron
======================================================================
Trigger: 00779351 Segment: 000
BAT Trigger Time: 529833229.376 [s; MET]
Trigger Stop: 529833229.888 [s; MET]
UTC: 2017-10-16T07:53:29.527620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 40.9080325801543 Dec: 61.4331455489146 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.31
Image Trigger?: NO
Rate S/N Ratio: 12 [ if not an image trigger ]
Image S/N Ratio: 7.31
Flight Position: [ source = BAT ]
RA: 40.9080325801543 Dec: 61.4331455489146 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 41.0110812245185 Dec: 61.4280419149056 [deg; J2000]
{ 02h 44m 02.7s , +61d 25' 41.0" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 2.19398296311025 [arcmin] (formal 1-sigma fit error)
SNR: -5.28811288657065
Angular difference between Flight and Ground position is 2.972628 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 1061 +/- 668.434738774101
Measured from: -182.375999867916
to: 878.624000132084 [s; relative to TRIGTIME]
T50: 634 +/- 611.032732347458
Measured from: 47.6240001320839
to: 681.624000132084 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 173.624000012875
to: 174.624000012875 [s; relative to TRIGTIME]
Total Fluence
Measured from: -236.375999987125
to: 960.624000012875 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 48.891690 39.088252 9.065133 0.641169
0.206523 0.207254 0.167909 0.142578 [error]
Peak 0.082555 0.078767 0.019465 -0.001864
0.006663 0.006775 0.005303 0.004189 [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 1.99e-05 1.47e-05 7.25e-06 5.08e-06 4.42e-05 4.69e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Power-law 8.54e-01 4.93e-01 1.80e-01 8.70e-02 1.57e+00 1.61e+00 ph/cm2/s
Error 1.13e-01 5.47e-02 3.90e-02 3.40e-02 1.62e-01 1.67e-01 ph/cm2/s
Fluence Cutoff-PL 1.50e-05 1.59e-05 6.75e-06 9.68e-07 3.85e-05 3.87e-05 erg/cm2
Error 8.14e-07 3.20e-07 2.33e-07 1.89e-07 1.05e-06 1.08e-06 erg/cm2
Peak flux Cutoff-PL 7.88e-01 5.66e-01 1.50e-01 1.29e-02 1.52e+00 1.52e+00 ph/cm2/s
Error 1.28e-01 7.94e-02 5.08e-02 2.73e-02 1.66e-01 1.67e-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 3.021 0.000 - - 3.05e-03 0.00e+00 241.750 57
CPL 1.413 0.225 15.9 4.0 2.21e-02 6.20e-03 38.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.452 0.218 - - 8.24e-03 1.36e-03 62.290 57
CPL 1.040 1.179 24.5 0.0 6.35e-02 0.00e+00 57.240 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: 17.728000 sec.
T50 in the 50-300 keV band: 8.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1197.000 -236.376 960.624
T90 1061.000 -182.376 878.624
T50 634.000 47.624 681.624
Peak 1.000 173.624 174.624
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
41.0111 +61.4280 0.0364 0.5 -39.3 -8.5112 -5.3 TRIG_00779351
------------------------------------------
Foreground time interval of the image:
-236.376 15.225 (delta_t = 251.601 [sec])
Background time interval of the image:
-239.376 -236.376 (delta_t = 3.000 [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
-236.376000 284.574000
285.624000 960.624000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.02113 ( )
Norm@50keV : 3.04760E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 241.75 using 59 PHA bins.
# Reduced chi-squared = 4.2412 for 57 degrees of freedom
# Null hypothesis probability = 1.321452e-24
Photon flux (15-150 keV) in 1196 sec: 0.851138 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.42252e-05 ( 0 0 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-236.376000 284.574000
285.624000 960.624000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.41306 ( -0.230505 0.220296 )
Epeak [keV] : 15.8534 ( -4.42112 3.5189 )
Norm@50keV : 2.20921E-02 ( -0.00519789 0.00720535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.99 using 59 PHA bins.
# Reduced chi-squared = 0.6963 for 56 degrees of freedom
# Null hypothesis probability = 9.592160e-01
Photon flux (15-150 keV) in 1196 sec: 0.714814 ( -0.025388 0.025767 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85193e-05 ( -1.04303e-06 1.05332e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-236.376000 284.574000
285.624000 960.624000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.36217 ( -0.132896 0.284019 )
beta : -4.54907 ( 4.57555 0.611457 )
Epeak [keV] : 16.6039 ( -4.47887 3.69223 )
Norm@50keV : 2.36734E-02 ( -0.00603206 0.0105801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.03 using 59 PHA bins.
# Reduced chi-squared = 0.6914 for 55 degrees of freedom
# Null hypothesis probability = 9.606090e-01
Photon flux (15-150 keV) in 1196 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] : 8.59656 ( )
R^2/D10^2 : 0.499386 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 358.51 using 59 PHA bins.
# Reduced chi-squared = 6.2896 for 57 degrees of freedom
# Null hypothesis probability = 2.721676e-45
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.376e-06 3.140e-07
25- 50 1.655e-05 3.289e-07
50-150 5.475e-06 2.057e-07
15-150 3.040e-05 5.980e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.9608 (-0.797164 0.832198)
Norm : 6.46597 (-0.30111 0.315204)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.84 using 59 PHA bins.
# Reduced chi-squared = 0.6815 for 57 degrees of freedom
# Null hypothesis probability = 9.685673e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.484e-05 4.605e-07
25- 50 1.594e-05 3.050e-07
50-150 7.554e-06 2.924e-07
15-150 3.834e-05 6.937e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.40377 (-0.383764 0.385617)
R1^2/D10^2 : 2.88758 (-0.695743 1.03365)
kT2 [keV] : 12.5516 (-0.769807 0.939532)
R2^2/D10^2 : 5.39368E-02 (-0.0184821 0.0242045)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.43 using 59 PHA bins.
# Reduced chi-squared = 0.6806 for 55 degrees of freedom
# Null hypothesis probability = 9.664336e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.350e-05 9.149e-07
25- 50 1.607e-05 6.997e-07
50-150 7.485e-06 5.406e-07
15-150 3.706e-05 1.680e-06
Peak spectrum fit
Power-law model
Time interval is from 173.624 sec. to 174.624 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.45176 ( -0.208242 0.226769 )
Norm@50keV : 8.24419E-03 ( -0.00136406 0.00134853 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.29 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.935834e-01
Photon flux (15-150 keV) in 1 sec: 1.57287 ( -0.16177 0.161771 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.14151e-08 ( -1.02045e-08 1.04972e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 173.624 sec. to 174.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03965 ( -1.4018 0.955633 )
Epeak [keV] : 24.5437 ( )
Norm@50keV : 6.34586E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.24 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 56 degrees of freedom
# Null hypothesis probability = 4.287579e-01
Photon flux (15-150 keV) in 1 sec: 1.51525 ( -0.16509 0.16595 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.29706e-08 ( -9.7814e-09 1.12923e-08 ) ergs/cm2
Band function
Time interval is from 173.624 sec. to 174.624 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.07124 ( -0.949074 0.99643 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 24.3630 ( -4.87997 7.66066 )
Norm@50keV : 6.04120E-02 ( -0.0604362 0.650797 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.25 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 55 degrees of freedom
# Null hypothesis probability = 3.917814e-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] : 7.89295 (-0.80374 0.875092)
R^2/D10^2 : 1.83108 (-0.641727 1.01225)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.32 using 59 PHA bins.
# Reduced chi-squared = 1.146 for 57 degrees of freedom
# Null hypothesis probability = 2.101121e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.042e-08 3.240e-09
25- 50 3.491e-08 4.865e-09
50-150 8.766e-09 3.023e-09
15-150 6.409e-08 8.800e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.0271 (-7.24071 9.94343)
Norm : 11.4566 (-2.18493 2.81038)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.45 using 59 PHA bins.
# Reduced chi-squared = 1.008 for 57 degrees of freedom
# Null hypothesis probability = 4.585394e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.473e-08 3.215e-09
25- 50 3.019e-08 3.955e-09
50-150 1.938e-08 6.790e-09
15-150 7.431e-08 1.123e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.41327 (-1.18054 1.93409)
R1^2/D10^2 : 220.517 (-212.326 68470.6)
kT2 [keV] : 9.19347 (-1.26866 2.11519)
R2^2/D10^2 : 0.872934 (-0.562738 0.827017)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.02 using 59 PHA bins.
# Reduced chi-squared = 1.000 for 55 degrees of freedom
# Null hypothesis probability = 4.740286e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.384e-08 9.843e-09
25- 50 3.248e-08 1.152e-08
50-150 1.298e-08 5.586e-09
15-150 6.930e-08 2.276e-08
Plot creation:
Tue Oct 17 07:18:47 EDT 2017