batgrbproduct analysis for trigger=927345
batgrbproduct Analysis for Trigger=927345
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): Wed Oct 2 19:58:29 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger927345/GCN5_download_cron
======================================================================
Trigger: 00927345 Segment: 000
BAT Trigger Time: 591643184 [s; MET]
Trigger Stop: 591643264 [s; MET]
UTC: 2019-10-01T17:19:20.323880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 86.3680994408955 Dec: -15.907114841062 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.15
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.15
Flight Position: [ source = BAT ]
RA: 86.3680994408955 Dec: -15.907114841062 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 86.4227486298145 Dec: -15.8800823916 [deg; J2000]
{ 05h 45m 41.5s , -15d 52' 48.3" }
+/- 3.59626149120592 [arcmin] (estimated 90% radius based on SNR)
+/- 2.07388691356744 [arcmin] (formal 1-sigma fit error)
SNR: 4.88703160518075
Angular difference between Flight and Ground position is 3.546255 arcmin
Partial Coding Fraction: 0.3398438 [ including projection effects ]
Duration
T90: 108.915999889374 +/- 15.1391017264422
Measured from: 5.4960001707077
to: 114.412000060081 [s; relative to TRIGTIME]
T50: 64.1959999799728 +/- 9.63714891659396
Measured from: 30.5400000810623
to: 94.7360000610352 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 20.4359999895096
to: 21.4359999895096 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.77199995517731
to: 126.111999988556 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.878345 2.440237 2.170828 0.436102
0.141611 0.146932 0.127152 0.109093 [error]
Peak 0.049810 0.063929 0.074314 0.032082
0.013085 0.014221 0.013141 0.010169 [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 6.79e-07 1.19e-06 1.59e-06 4.38e-06 4.64e-06 7.84e-06 erg/cm2
Error 7.51e-08 7.94e-08 1.24e-07 7.38e-07 3.03e-07 8.24e-07 erg/cm2
Peak flux Power-law 4.35e-01 5.48e-01 5.03e-01 8.08e-01 1.76e+00 2.29e+00 ph/cm2/s
Error 1.81e-01 1.39e-01 9.88e-02 3.53e-01 3.62e-01 4.35e-01 ph/cm2/s
Fluence Cutoff-PL 6.16e-07 1.23e-06 1.66e-06 2.49e-06 4.53e-06 6.00e-06 erg/cm2
Error 9.35e-08 9.12e-08 1.42e-07 1.34e-06 3.20e-07 1.36e-06 erg/cm2
Peak flux Cutoff-PL 4.46e-01 5.54e-01 5.02e-01 7.85e-01 1.77e+00 2.29e+00 ph/cm2/s
Error 1.85e-01 -------- 1.04e-01 4.18e-01 3.63e-01 4.34e-01 ph/cm2/s
Fluence Band 6.31e-07 1.32e-06 1.83e-06 2.68e-06 4.92e-06 6.48e-06 erg/cm2
Error 9.77e-08 -------- -------- -------- 3.33e-07 -------- 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 1.578 0.108 - - 3.66e-03 2.27e-04 48.140 57
CPL 1.121 0.446 103.5 233.1 6.03e-03 3.01e-03 44.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.122 0.346 - - 1.51e-02 2.93e-03 48.480 57
CPL 1.117 0.366 9999.3 0.0 1.52e-02 1.15e-02 48.490 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: 98.048000 sec.
T50 in the 50-300 keV band: 56.128000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 134.884 -8.772 126.112
T90 108.916 5.496 114.412
T50 64.196 30.540 94.736
Peak 1.000 20.436 21.436
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
86.4227 -15.8801 0.0392 45.7 9.1 4.3274 4.9 TRIG_00927345
------------------------------------------
Foreground time interval of the image:
-8.772 83.201 (delta_t = 91.973 [sec])
Background time interval of the image:
-14.499 -8.772 (delta_t = 5.727 [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 -8.772 sec. to 126.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57761 ( -0.107445 0.108145 )
Norm@50keV : 3.66469E-03 ( -0.000226821 0.000226328 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.14 using 59 PHA bins.
# Reduced chi-squared = 0.8446 for 57 degrees of freedom
# Null hypothesis probability = 7.920690e-01
Photon flux (15-150 keV) in 134.9 sec: 0.467722 ( -0.0305895 0.0306873 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.63647e-06 ( -3.02409e-07 3.03279e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.772 sec. to 126.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12105 ( -0.467573 0.42366 )
Epeak [keV] : 103.545 ( -28.0613 438.208 )
Norm@50keV : 6.02813E-03 ( -0.00218395 0.00383827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.73 using 59 PHA bins.
# Reduced chi-squared = 0.7988 for 56 degrees of freedom
# Null hypothesis probability = 8.603019e-01
Photon flux (15-150 keV) in 134.9 sec: 0.455911 ( -0.032337 0.032478 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.53234e-06 ( -3.20522e-07 3.20064e-07 ) ergs/cm2
Band function
Time interval is from -8.772 sec. to 126.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12088 ( -0.525332 0.33205 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 103.496 ( -28.0164 434.26 )
Norm@50keV : 6.02902E-03 ( -0.00218353 0.00383815 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.73 using 59 PHA bins.
# Reduced chi-squared = 0.8133 for 55 degrees of freedom
# Null hypothesis probability = 8.371554e-01
Photon flux (15-150 keV) in 134.9 sec: 0.491046 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 4.92056e-06 ( -4.91961e-06 -3.10513e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.2069 (-1.17349 1.27608)
R^2/D10^2 : 3.96313E-02 (-0.00945891 0.012283)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.78 using 59 PHA bins.
# Reduced chi-squared = 1.698 for 57 degrees of freedom
# Null hypothesis probability = 7.918563e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.895e-07 3.494e-08
25- 50 1.232e-06 1.042e-07
50-150 2.272e-06 2.570e-07
15-150 3.793e-06 2.718e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.982 (-53.1327 -198.996)
Norm : 1.89876 (-0.115901 0.133843)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.16 using 59 PHA bins.
# Reduced chi-squared = 0.7922 for 57 degrees of freedom
# Null hypothesis probability = 8.714878e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.380e-07 4.944e-08
25- 50 1.227e-06 1.151e-07
50-150 2.689e-06 8.926e-07
15-150 4.554e-06 8.229e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.29020 (-1.13741 1.46406)
R1^2/D10^2 : 1.26278 (-0.772247 2.36981)
kT2 [keV] : 21.6442 (-2.44692 3.40474)
R2^2/D10^2 : 1.22673E-02 (-0.00528326 0.00716069)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.86 using 59 PHA bins.
# Reduced chi-squared = 0.7611 for 55 degrees of freedom
# Null hypothesis probability = 9.039880e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.610e-07 2.100e-07
25- 50 1.144e-06 2.475e-07
50-150 2.668e-06 4.270e-07
15-150 4.473e-06 7.446e-07
Peak spectrum fit
Power-law model
Time interval is from 20.436 sec. to 21.436 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.12232 ( -0.356966 0.334697 )
Norm@50keV : 1.51496E-02 ( -0.00296008 0.00290349 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.48 using 59 PHA bins.
# Reduced chi-squared = 0.8506 for 57 degrees of freedom
# Null hypothesis probability = 7.817304e-01
Photon flux (15-150 keV) in 1 sec: 1.76124 ( -0.360965 0.363319 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57283e-07 ( -3.02648e-08 3.0324e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.436 sec. to 21.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11719 ( -0.394735 0.337047 )
Epeak [keV] : 9999.28 ( -9999.33 -9999.33 )
Norm@50keV : 1.52302E-02 ( -0.00291086 0.0201419 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.49 using 59 PHA bins.
# Reduced chi-squared = 0.8659 for 56 degrees of freedom
# Null hypothesis probability = 7.517628e-01
Photon flux (15-150 keV) in 1 sec: 1.77093 ( -0.37199 0.35362 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57421e-07 ( -3.0226e-08 2.9934e-08 ) ergs/cm2
Band function
Time interval is from 20.436 sec. to 21.436 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.833566 ( 0.802853 0.802853 )
beta : -1.12367 ( 1.12314 0.357234 )
Epeak [keV] : 81.1607 ( -75.785 -75.785 )
Norm@50keV : 2.63557E-02 ( -0.0156562 633179 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.47 using 59 PHA bins.
# Reduced chi-squared = 0.8814 for 55 degrees of freedom
# Null hypothesis probability = 7.205047e-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] : 25.1757 (-5.86545 9.1389)
R^2/D10^2 : 3.91450E-02 (-0.0242019 0.0536198)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.25 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 57 degrees of freedom
# Null hypothesis probability = 4.657325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.294e-09 2.020e-09
25- 50 2.445e-08 9.460e-09
50-150 1.148e-07 4.190e-08
15-150 1.435e-07 4.927e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-55.788 -200)
Norm : 7.54989 (-1.45678 1.45678)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9535 for 57 degrees of freedom
# Null hypothesis probability = 5.751307e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.881e-08 1.087e-08
25- 50 3.619e-08 2.091e-08
50-150 7.937e-08 4.468e-08
15-150 1.344e-07 7.790e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.53977 (-2.32155 4.67077)
R1^2/D10^2 : 4.19855 (-3.74316 46.3095)
kT2 [keV] : 35.0977 (-10.6159 36.0859)
R2^2/D10^2 : 1.27321E-02 (-0.010728 0.0149707)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.08 using 59 PHA bins.
# Reduced chi-squared = 0.8560 for 55 degrees of freedom
# Null hypothesis probability = 7.674325e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.734e-08 9.725e-09
25- 50 2.712e-08 1.465e-08
50-150 1.176e-07 6.620e-08
15-150 1.621e-07 7.947e-08
Plot creation:
Wed Oct 2 20:02:59 EDT 2019