batgrbproduct analysis for trigger=873433
batgrbproduct Analysis for Trigger=873433
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): Mon Nov 26 04:18:16 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger873433/GCN5_download_cron
======================================================================
Trigger: 00873433 Segment: 000
BAT Trigger Time: 564828901.888 [s; MET]
Trigger Stop: 564828902.912 [s; MET]
UTC: 2018-11-25T08:54:39.910800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.412921582668 Dec: -2.61324691311512 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.18
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 8.18
Flight Position: [ source = BAT ]
RA: 268.412921582668 Dec: -2.61324691311512 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.390739547673 Dec: -2.63367247228719 [deg; J2000]
{ 17h 53m 33.8s , -02d 38' 01.2" }
+/- 2.19771914770796 [arcmin] (estimated 90% radius based on SNR)
+/- 0.921432316240202 [arcmin] (formal 1-sigma fit error)
SNR: 9.87612725265013
Angular difference between Flight and Ground position is 1.808197 arcmin
Partial Coding Fraction: 0.6953125 [ including projection effects ]
Duration
T90: 10.5119999647141 +/- 5.04191239937837
Measured from: 0.0720001459121704
to: 10.5840001106262 [s; relative to TRIGTIME]
T50: 3.21599996089935 +/- 2.02033268314815
Measured from: 0.716000080108643
to: 3.932000041008 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.240000009536743
to: 1.24000000953674 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.180000066757202
to: 11.2400000095367 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.157131 0.199555 0.175659 0.019805
0.032492 0.032294 0.027307 0.023599 [error]
Peak 0.055968 0.078036 0.047186 0.017672
0.010356 0.010853 0.009204 0.007184 [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 4.75e-08 8.36e-08 1.13e-07 3.12e-07 3.27e-07 5.56e-07 erg/cm2
Error 1.33e-08 1.46e-08 2.68e-08 1.59e-07 6.42e-08 1.81e-07 erg/cm2
Peak flux Power-law 6.24e-01 5.16e-01 2.90e-01 2.41e-01 1.54e+00 1.67e+00 ph/cm2/s
Error 1.56e-01 8.50e-02 7.74e-02 1.27e-01 2.53e-01 2.81e-01 ph/cm2/s
Fluence Cutoff-PL 4.20e-08 8.88e-08 1.18e-07 1.37e-07 3.15e-07 3.85e-07 erg/cm2
Error 1.68e-08 1.76e-08 3.03e-08 2.53e-07 6.70e-08 2.35e-07 erg/cm2
Peak flux Cutoff-PL 6.27e-01 5.16e-01 2.88e-01 2.35e-01 1.54e+00 1.67e+00 ph/cm2/s
Error 1.22e-01 8.67e-02 7.74e-02 1.93e-01 2.54e-01 2.40e-01 ph/cm2/s
Fluence Band 4.12e-08 8.79e-08 1.19e-07 1.50e-07 3.18e-07 4.01e-07 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 1.569 0.305 - - 3.05e-03 5.49e-04 98.220 57
CPL 0.916 1.094 85.4 -26.6 6.39e-03 1.51e-02 97.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.831 0.319 - - 1.10e-02 2.21e-03 61.000 57
CPL 1.845 0.521 9999.4 0.0 1.09e-02 0.00e+00 61.010 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: 2.176000 sec.
T50 in the 50-300 keV band: 1.472000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 11.420 -0.180 11.240
T90 10.512 0.072 10.584
T50 3.216 0.716 3.932
Peak 1.000 0.240 1.240
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.3907 -2.6337 0.0194 23.9 -63.1 0.6409 9.9 TRIG_00873433
------------------------------------------
Foreground time interval of the image:
-0.180 11.240 (delta_t = 11.420 [sec])
Background time interval of the image:
-38.787 -0.180 (delta_t = 38.607 [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 -0.180 sec. to 11.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.56943 ( -0.299705 0.311277 )
Norm@50keV : 3.04983E-03 ( -0.000553596 0.000544303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 98.22 using 59 PHA bins.
# Reduced chi-squared = 1.723 for 57 degrees of freedom
# Null hypothesis probability = 5.699974e-04
Photon flux (15-150 keV) in 11.42 sec: 0.388297 ( -0.0670702 0.0671982 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.27004e-07 ( -6.35337e-08 6.47819e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.180 sec. to 11.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.916248 ( -1.54524 0.643624 )
Epeak [keV] : 85.3836 ( -32.0857 -85.3528 )
Norm@50keV : 6.39399E-03 ( -0.00380612 0.0264659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.37 using 59 PHA bins.
# Reduced chi-squared = 1.739 for 56 degrees of freedom
# Null hypothesis probability = 5.129614e-04
Photon flux (15-150 keV) in 11.42 sec: 0.376367 ( -0.071445 0.070612 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.14716e-07 ( -6.56673e-08 6.84218e-08 ) ergs/cm2
Band function
Time interval is from -0.180 sec. to 11.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.951727 ( -6.31763 1.57734 )
beta : -9.37166 ( 9.3714 19.3714 )
Epeak [keV] : 89.4063 ( -36.1474 -89.3884 )
Norm@50keV : 6.06374E-03 ( -0.00346756 2246.45 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.37 using 59 PHA bins.
# Reduced chi-squared = 1.770 for 55 degrees of freedom
# Null hypothesis probability = 3.753728e-04
Photon flux (15-150 keV) in 11.42 sec: 0.377514 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17515e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.0902 (-2.84071 3.49893)
R^2/D10^2 : 3.46876E-02 (-0.0173361 0.0337934)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 102.32 using 59 PHA bins.
# Reduced chi-squared = 1.7951 for 57 degrees of freedom
# Null hypothesis probability = 2.165575e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.118e-08 8.407e-09
25- 50 8.955e-08 2.613e-08
50-150 1.624e-07 5.440e-08
15-150 2.731e-07 7.383e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 196.593 (-106.377 -194.576)
Norm : 1.58548 (-0.271981 0.3243)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.64 using 59 PHA bins.
# Reduced chi-squared = 1.713 for 57 degrees of freedom
# Null hypothesis probability = 6.518274e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.517e-08 2.566e-08
25- 50 8.675e-08 4.892e-08
50-150 1.894e-07 1.069e-07
15-150 3.213e-07 1.804e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.48021 (-2.43182 2.54741)
R1^2/D10^2 : 6.69350 (-6.19764 30886)
kT2 [keV] : 19.0045 (-3.92385 5.70426)
R2^2/D10^2 : 1.77495E-02 (-0.0109219 0.0165679)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 93.23 using 59 PHA bins.
# Reduced chi-squared = 1.695 for 55 degrees of freedom
# Null hypothesis probability = 9.853201e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.835e-08 2.652e-08
25- 50 7.731e-08 3.682e-08
50-150 1.838e-07 1.031e-07
15-150 3.094e-07 1.374e-07
Peak spectrum fit
Power-law model
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.83148 ( -0.306255 0.331519 )
Norm@50keV : 1.10114E-02 ( -0.00225479 0.00215871 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 57 degrees of freedom
# Null hypothesis probability = 3.341254e-01
Photon flux (15-150 keV) in 1 sec: 1.53626 ( -0.253447 0.25352 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01281e-07 ( -2.02856e-08 2.08873e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84464 ( -0.317553 0.72513 )
Epeak [keV] : 9999.36 ( )
Norm@50keV : 1.09321E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.01 using 59 PHA bins.
# Reduced chi-squared = 1.089 for 56 degrees of freedom
# Null hypothesis probability = 3.007749e-01
Photon flux (15-150 keV) in 1 sec: 1.53626 ( -0.25416 0.25304 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01215e-07 ( -2.18031e-08 2.0721e-08 ) ergs/cm2
Band function
Time interval is from 0.240 sec. to 1.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.40971 ( 3.08266 9.40971 )
beta : -1.83148 ( -0.331519 0.306299 )
Epeak [keV] : 116.118 ( -116.118 -116.118 )
Norm@50keV : 1.49660 ( -0.306458 0.293399 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.00 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 55 degrees of freedom
# Null hypothesis probability = 2.690237e-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] : 9.99630 (-2.2038 3.18375)
R^2/D10^2 : 0.700217 (-0.693073 1.08836)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.99 using 59 PHA bins.
# Reduced chi-squared = 1.298 for 57 degrees of freedom
# Null hypothesis probability = 6.462825e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.425e-08 5.180e-09
25- 50 3.541e-08 1.050e-08
50-150 1.846e-08 8.307e-09
15-150 6.811e-08 1.798e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.7117 (-45.3062 -97.7223)
Norm : 6.78957 (-1.33175 2.06703)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.86 using 59 PHA bins.
# Reduced chi-squared = 1.085 for 57 degrees of freedom
# Null hypothesis probability = 3.066563e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.774e-08 4.110e-09
25- 50 3.054e-08 8.395e-09
50-150 4.884e-08 3.247e-08
15-150 9.712e-08 3.884e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.05062 (-1.68826 2.03574)
R1^2/D10^2 : 3.60128 (-2.37509 9.40897)
kT2 [keV] : 26.8029 (-9.73005 30.4147)
R2^2/D10^2 : 1.47316E-02 (-0.0131413 0.0589784)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.60 using 59 PHA bins.
# Reduced chi-squared = 1.084 for 55 degrees of freedom
# Null hypothesis probability = 3.119891e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.950e-08 1.087e-08
25- 50 2.839e-08 1.499e-08
50-150 5.632e-08 3.551e-08
15-150 1.042e-07 5.550e-08
Plot creation:
Mon Nov 26 04:23:07 EST 2018