batgrbproduct analysis for trigger=867743
batgrbproduct Analysis for Trigger=867743
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): Sat Oct 20 14:05:28 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger867743/GCN5_download_cron
======================================================================
Trigger: 00867743 Segment: 000
BAT Trigger Time: 561631760 [s; MET]
Trigger Stop: 561631824 [s; MET]
UTC: 2018-10-19T08:48:58.221740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.967300380166 Dec: -15.848390688462 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.25
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.25
Flight Position: [ source = BAT ]
RA: 244.967300380166 Dec: -15.848390688462 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.976345530826 Dec: -15.7841641870154 [deg; J2000]
{ 16h 19m 54.3s , -15d 47' 03.0" }
+/- 1.22080710192262 [arcmin] (estimated 90% radius based on SNR)
+/- 0.641979049454048 [arcmin] (formal 1-sigma fit error)
SNR: 22.8737244031647
Angular difference between Flight and Ground position is 3.888806 arcmin
Partial Coding Fraction: 0.6875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.889873 0.296908 0.047519 -0.006348
0.078990 0.069348 0.058405 0.052699 [error]
Peak 2.889873 0.296908 0.047519 -0.006348
0.078990 0.069348 0.058405 0.052699 [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 9.43e-07 1.53e-07 1.16e-08 9.40e-10 1.11e-06 1.11e-06 erg/cm2
Error 9.74e-08 3.20e-08 5.91e-09 8.38e-10 1.02e-07 1.02e-07 erg/cm2
Peak flux Power-law 5.17e-01 4.90e-02 1.85e-03 7.28e-05 5.68e-01 5.68e-01 ph/cm2/s
Error 5.53e-02 9.71e-03 9.23e-04 6.27e-05 5.54e-02 5.54e-02 ph/cm2/s
Fluence Cutoff-PL 9.41e-07 1.20e-07 6.86e-10 3.13e-14 1.06e-06 1.06e-06 erg/cm2
Error 1.03e-07 3.86e-08 3.69e-09 7.20e-11 1.08e-07 1.08e-07 erg/cm2
Peak flux Cutoff-PL 5.11e-01 4.03e-02 1.23e-04 2.90e-09 5.51e-01 5.51e-01 ph/cm2/s
Error 5.94e-02 1.17e-02 6.09e-04 6.14e-06 5.96e-02 5.95e-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 5.723 0.436 - - 1.82e-04 7.50e-05 41.700 57
CPL 1.000 0.000 50.0 0.0 3.32e-03 0.00e+00 288.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.723 0.436 - - 1.82e-04 7.50e-05 41.700 57
CPL 1.000 0.000 50.0 0.0 3.32e-03 0.00e+00 288.440 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9763 -15.7842 0.0084 23.7 -64.0 3.5301 22.9 TRIG_00867743
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.72282 ( -0.425998 0.44508 )
Norm@50keV : 1.82066E-04 ( -6.3416e-05 8.66802e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.70 using 59 PHA bins.
# Reduced chi-squared = 0.7315 for 57 degrees of freedom
# Null hypothesis probability = 9.360254e-01
Photon flux (15-150 keV) in 64 sec: 0.568142 ( -0.0552381 0.0554836 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10826e-06 ( -1.01732e-07 1.01809e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.32172E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 288.44 using 59 PHA bins.
# Reduced chi-squared = 5.1507 for 56 degrees of freedom
# Null hypothesis probability = 5.154889e-33
Photon flux (15-150 keV) in 64 sec: 0.551428 ( -0.060148 0.059029 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06145e-06 ( -1.08429e-07 1.07386e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.96879 ( 3.2929 7.96879 )
beta : -5.77332 ( -0.407244 0.469023 )
Epeak [keV] : 374.714 ( -374.714 -374.714 )
Norm@50keV : 2.35631E-02 ( -0.00789637 0.0125775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.74 using 59 PHA bins.
# Reduced chi-squared = 0.7588 for 55 degrees of freedom
# Null hypothesis probability = 9.063451e-01
Photon flux (15-150 keV) in 64 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] : 2.76839 (-0.232541 0.261605)
R^2/D10^2 : 129.632 (-62.9196 124.69)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.41 using 59 PHA bins.
# Reduced chi-squared = 0.6915 for 57 degrees of freedom
# Null hypothesis probability = 9.633762e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.251e-07 1.836e-07
25- 50 1.010e-07 2.538e-08
50-150 8.237e-11 6.021e-11
15-150 1.026e-06 1.862e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.00186 (-0.602926 0.729564)
Norm : 127.208 (-51.9527 90.8879)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.66 using 59 PHA bins.
# Reduced chi-squared = 0.6608 for 57 degrees of freedom
# Null hypothesis probability = 9.775123e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.412e-07 1.795e-07
25- 50 1.191e-07 3.088e-08
50-150 6.183e-10 4.327e-10
15-150 1.061e-06 1.904e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.47925 (-0.234351 0.261825)
R1^2/D10^2 : 8218.19 (-8837.09 -8853.9)
kT2 [keV] : 3.17513 (-0.391793 0.748285)
R2^2/D10^2 : 41.3209 (-43.2629 111.112)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.30 using 59 PHA bins.
#Fit statistic : Chi-Squared = 36.66 using 59 PHA bins.
# Reduced chi-squared = 0.7146 for 55 degrees of freedom
# Reduced chi-squared = 0.6665 for 55 degrees of freedom
# Null hypothesis probability = 9.455706e-01
# Null hypothesis probability = 9.730420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.254e-07 1.752e-07
25- 50 1.012e-07 2.995e-08
50-150 1.588e-08 5.906e-11
15-150 1.042e-06 2.189e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.72282 ( -0.425998 0.44508 )
Norm@50keV : 1.82066E-04 ( -6.3416e-05 8.66802e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.70 using 59 PHA bins.
# Reduced chi-squared = 0.7315 for 57 degrees of freedom
# Null hypothesis probability = 9.360254e-01
Photon flux (15-150 keV) in 64 sec: 0.568142 ( -0.0552381 0.0554836 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10826e-06 ( -1.01732e-07 1.01809e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 3.32172E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 288.44 using 59 PHA bins.
# Reduced chi-squared = 5.1507 for 56 degrees of freedom
# Null hypothesis probability = 5.154889e-33
Photon flux (15-150 keV) in 64 sec: 0.551428 ( -0.060148 0.059029 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06145e-06 ( -1.08429e-07 1.07386e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -7.96879 ( 3.2929 7.96879 )
beta : -5.77332 ( -0.407244 0.469023 )
Epeak [keV] : 374.714 ( -374.714 -374.714 )
Norm@50keV : 2.35631E-02 ( -0.00789637 0.0125775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.74 using 59 PHA bins.
# Reduced chi-squared = 0.7588 for 55 degrees of freedom
# Null hypothesis probability = 9.063451e-01
Photon flux (15-150 keV) in 64 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] : 2.76839 (-0.232541 0.261605)
R^2/D10^2 : 129.632 (-62.9196 124.69)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.41 using 59 PHA bins.
# Reduced chi-squared = 0.6915 for 57 degrees of freedom
# Null hypothesis probability = 9.633762e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.251e-07 1.927e-07
25- 50 1.010e-07 3.087e-08
50-150 8.237e-11 5.956e-11
15-150 1.026e-06 1.942e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.00186 (-0.602926 0.729564)
Norm : 127.208 (-51.9527 90.8879)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.66 using 59 PHA bins.
# Reduced chi-squared = 0.6608 for 57 degrees of freedom
# Null hypothesis probability = 9.775123e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.412e-07 1.699e-07
25- 50 1.191e-07 3.139e-08
50-150 6.183e-10 4.288e-10
15-150 1.061e-06 1.834e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.47925 (-0.234351 0.261825)
R1^2/D10^2 : 8218.19 (-8837.09 -8853.9)
kT2 [keV] : 3.17513 (-0.391525 0.748288)
R2^2/D10^2 : 41.3209 (-43.2629 111.11)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.30 using 59 PHA bins.
#Fit statistic : Chi-Squared = 36.66 using 59 PHA bins.
# Reduced chi-squared = 0.7146 for 55 degrees of freedom
# Reduced chi-squared = 0.6665 for 55 degrees of freedom
# Null hypothesis probability = 9.455706e-01
# Null hypothesis probability = 9.730420e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.254e-07 2.035e-07
25- 50 1.012e-07 2.754e-08
50-150 1.588e-08 6.150e-11
15-150 1.042e-06 1.824e-07
Plot creation:
Sat Oct 20 14:09:42 EDT 2018