batgrbproduct analysis for trigger=871103
batgrbproduct Analysis for Trigger=871103
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): Fri Nov 9 16:41:18 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger871103/GCN5_download_cron
======================================================================
Trigger: 00871103 Segment: 000
BAT Trigger Time: 563398656 [s; MET]
Trigger Stop: 563398776 [s; MET]
UTC: 2018-11-08T19:37:14.111960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 188.035299334174 Dec: 13.3378483340587 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.03
Flight Position: [ source = BAT ]
RA: 188.035299334174 Dec: 13.3378483340587 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 188.046548069363 Dec: 13.3319705262153 [deg; J2000]
{ 12h 32m 11.2s , +13d 19' 55.1" }
+/- 4.13559434067084 [arcmin] (estimated 90% radius based on SNR)
+/- 2.15690792200982 [arcmin] (formal 1-sigma fit error)
SNR: 4.00267109693741
Angular difference between Flight and Ground position is 0.745430 arcmin
Partial Coding Fraction: 0.7109375 [ including projection effects ]
Duration
T90: 120 +/-
Measured from: 0
to: 120 [s; relative to TRIGTIME]
T50: 120 +/-
Measured from: 0
to: 120 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 120 second)
Measured from: 0
to: 120 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 120 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.375401 0.291039 0.110562 0.007951
0.090833 0.093791 0.081025 0.069266 [error]
Peak 0.375401 0.291039 0.110562 0.007951
0.090833 0.093791 0.081025 0.069266 [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 9.76e-08 1.28e-07 1.23e-07 2.11e-07 4.19e-07 5.59e-07 erg/cm2
Error 4.00e-08 4.33e-08 6.73e-08 2.57e-07 1.65e-07 3.15e-07 erg/cm2
Peak flux Power-law 2.65e-02 1.93e-02 9.27e-03 6.31e-03 5.81e-02 6.14e-02 ph/cm2/s
Error 1.11e-02 6.43e-03 4.91e-03 7.22e-03 1.91e-02 2.04e-02 ph/cm2/s
Fluence Cutoff-PL 8.78e-08 1.77e-07 7.66e-08 3.37e-09 3.45e-07 3.45e-07 erg/cm2
Error 4.51e-08 6.38e-08 8.64e-08 6.57e-08 1.39e-07 1.51e-07 erg/cm2
Peak flux Cutoff-PL 2.31e-02 2.66e-02 6.37e-03 1.55e-04 5.63e-02 5.63e-02 ph/cm2/s
Error 1.23e-02 9.54e-03 6.70e-03 2.25e-03 1.83e-02 1.83e-02 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 2.052 0.565 - - 3.78e-04 1.58e-04 69.170 57
CPL -0.863 4.325 35.4 0.0 2.61e-02 0.00e+00 65.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.052 0.565 - - 3.78e-04 1.58e-04 69.170 57
CPL -0.863 4.325 35.4 0.0 2.61e-02 0.00e+00 65.670 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 120.000 0.000 120.000
T90 120.000 0.000 120.000
T50 120.000 0.000 120.000
Peak 120.000 0.000 120.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
188.0465 +13.3320 0.0479 33.4 -161.3 0.7911 4.0 TRIG_00871103
------------------------------------------
Foreground time interval of the image:
0.000 120.000 (delta_t = 120.000 [sec])
Background time interval of the image:
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 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05244 ( -0.523455 0.606132 )
Norm@50keV : 3.77826E-04 ( -0.000159349 0.000157161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.17 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.294930e-01
Photon flux (15-150 keV) in 120 sec: 5.80827E-02 ( -0.0191138 0.0191159 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19026e-07 ( -1.59052e-07 1.7174e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.863347 ( -5.94352 2.70724 )
Epeak [keV] : 35.4285 ( )
Norm@50keV : 2.60532E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.67 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 56 degrees of freedom
# Null hypothesis probability = 1.767956e-01
Photon flux (15-150 keV) in 120 sec: 5.62547E-02 ( -0.0180953 0.0184116 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44857e-07 ( -1.23715e-07 1.54024e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.830363 ( -2.31848 2.52275 )
beta : -10.00000 ( 10 8.65512e-11 )
Epeak [keV] : 35.4446 ( -10.3951 17.89 )
Norm@50keV : 2.48995E-02 ( -0.00767434 9.59516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.67 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 55 degrees of freedom
# Null hypothesis probability = 1.536394e-01
Photon flux (15-150 keV) in 120 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] : 9.03591 (-2.45977 3.28258)
R^2/D10^2 : 4.43338E-02 (-0.0443345 0.107153)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.77 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 57 degrees of freedom
# Null hypothesis probability = 1.993102e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.474e-08 5.241e-08
25- 50 1.812e-07 1.121e-07
50-150 6.999e-08 5.101e-08
15-150 3.360e-07 2.146e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 49.6371 (-25.4409 95.094)
Norm : 0.343302 (-0.143116 0.244568)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.40 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.630076e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.006e-07 6.231e-08
25- 50 1.440e-07 8.856e-08
50-150 1.389e-07 1.106e-07
15-150 3.835e-07 2.519e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23820 (-6.25745 -6.25745)
R1^2/D10^2 : 7.41566E-02 (-0.0744252 -0.0744252)
kT2 [keV] : 11.0477 (-11.1318 -11.1318)
R2^2/D10^2 : 1.37799E-02 (-0.0130907 0.132155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.59 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.552045e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.076e-08 2.150e-07
25- 50 1.727e-07 7.914e-07
50-150 8.865e-08 1.460e-06
15-150 3.521e-07 2.641e-06
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05244 ( -0.523455 0.606132 )
Norm@50keV : 3.77826E-04 ( -0.000159349 0.000157161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.17 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.294930e-01
Photon flux (15-150 keV) in 120 sec: 5.80827E-02 ( -0.0191138 0.0191159 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19026e-07 ( -1.59052e-07 1.7174e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.863347 ( -5.94352 2.70724 )
Epeak [keV] : 35.4285 ( )
Norm@50keV : 2.60532E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.67 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 56 degrees of freedom
# Null hypothesis probability = 1.767956e-01
Photon flux (15-150 keV) in 120 sec: 5.62547E-02 ( -0.0180953 0.0184116 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.44857e-07 ( -1.23715e-07 1.54024e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 120.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.830363 ( -2.31848 2.52275 )
beta : -10.00000 ( 10 1.01181e-11 )
Epeak [keV] : 35.4446 ( -10.3951 17.89 )
Norm@50keV : 2.48995E-02 ( -0.00767434 9.59516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.67 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 55 degrees of freedom
# Null hypothesis probability = 1.536394e-01
Photon flux (15-150 keV) in 120 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] : 9.03591 (-2.45977 3.28258)
R^2/D10^2 : 4.43338E-02 (-0.0443345 0.107153)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.77 using 59 PHA bins.
# Reduced chi-squared = 1.154 for 57 degrees of freedom
# Null hypothesis probability = 1.993102e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.474e-08 5.257e-08
25- 50 1.812e-07 1.096e-07
50-150 6.999e-08 5.254e-08
15-150 3.360e-07 2.090e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 49.6371 (-25.4409 95.094)
Norm : 0.343302 (-0.143116 0.244568)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.40 using 59 PHA bins.
# Reduced chi-squared = 1.182 for 57 degrees of freedom
# Null hypothesis probability = 1.630076e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.006e-07 6.294e-08
25- 50 1.440e-07 8.802e-08
50-150 1.389e-07 1.101e-07
15-150 3.835e-07 2.483e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.23820 (-6.25745 -6.25745)
R1^2/D10^2 : 7.41566E-02 (-0.0744252 -0.0744252)
kT2 [keV] : 11.0477 (-11.1318 -11.1318)
R2^2/D10^2 : 1.37799E-02 (-0.0130907 0.132155)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.59 using 59 PHA bins.
# Reduced chi-squared = 1.193 for 55 degrees of freedom
# Null hypothesis probability = 1.552045e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.076e-08 2.026e-07
25- 50 1.727e-07 7.848e-07
50-150 8.865e-08 5.768e-07
15-150 3.521e-07 2.040e-06
Plot creation:
Fri Nov 9 16:44:24 EST 2018