batgrbproduct analysis for trigger=1129775
batgrbproduct Analysis for Trigger=1129775
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 v2.48
Process Start Time (local time): Mon Oct 17 19:56:19 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1129775/GCN5_download_cron
======================================================================
Trigger: 01129775 Segment: 000
BAT Trigger Time: 687656394.24 [s; MET]
Trigger Stop: 687656395.264 [s; MET]
UTC: 2022-10-16T23:39:24.191840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 38.9491080216353 Dec: -34.6241149888059 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.3
Image Trigger?: NO
Rate S/N Ratio: 44.2944691807002 [ if not an image trigger ]
Image S/N Ratio: 15.3
Flight Position: [ source = BAT ]
RA: 38.9491080216353 Dec: -34.6241149888059 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 38.9400721291375 Dec: -34.6157206612603 [deg; J2000]
{ 02h 35m 45.6s , -34d 36' 56.6" }
+/- 0.908120129903186 [arcmin] (estimated 90% radius based on SNR)
+/- 0.262286834705552 [arcmin] (formal 1-sigma fit error)
SNR: 34.9070913066005
Angular difference between Flight and Ground position is 0.672853 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 226.815999865532 +/- 72.9441736956848
Measured from: -1.54399991035461
to: 225.271999955177 [s; relative to TRIGTIME]
T50: 48.191999912262 +/- 29.1884910184574
Measured from: 1.14400005340576
to: 49.3359999656677 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.0360000133514404
to: 1.03600001335144 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.20800006389618
to: 354.360000014305 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.695667 1.181592 1.046215 0.269610
0.109515 0.114483 0.102746 0.091687 [error]
Peak 0.072455 0.153957 0.162053 0.032475
0.010054 0.011967 0.011824 0.008562 [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 2.22e-07 4.79e-07 8.11e-07 3.15e-06 2.23e-06 4.67e-06 erg/cm2
Error 4.23e-08 5.42e-08 9.94e-08 8.73e-07 2.50e-07 9.34e-07 erg/cm2
Peak flux Power-law 7.32e-01 9.93e-01 9.92e-01 1.79e+00 3.30e+00 4.51e+00 ph/cm2/s
Error 1.14e-01 9.70e-02 8.79e-02 3.32e-01 2.69e-01 4.04e-01 ph/cm2/s
Fluence Cutoff-PL 2.15e-07 4.86e-07 8.23e-07 2.47e-06 2.20e-06 3.99e-06 erg/cm2
Error 4.97e-08 6.15e-08 1.10e-07 1.36e-06 2.70e-07 1.71e-06 erg/cm2
Peak flux Cutoff-PL 6.18e-01 1.04e+00 1.08e+00 9.58e-01 3.23e+00 3.69e+00 ph/cm2/s
Error 1.44e-01 1.11e-01 1.15e-01 5.02e-01 2.80e-01 5.64e-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 1.240 0.179 - - 6.21e-04 6.21e-05 75.250 57
CPL 1.077 0.593 302.4 0.0 7.43e-04 8.13e-04 75.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.000 0.135 - - 2.86e-02 2.35e-03 50.310 57
CPL 0.312 0.611 139.2 183.3 5.88e-02 4.01e-02 45.850 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: 9.792000 sec.
T50 in the 50-300 keV band: 3.648000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 357.568 -3.208 354.360
T90 226.816 -1.544 225.272
T50 48.192 1.144 49.336
Peak 1.000 0.036 1.036
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
38.9401 -34.6157 0.0056 24.3 -69.2 3.3199 34.9 TRIG_01129775
------------------------------------------
Foreground time interval of the image:
-3.208 15.061 (delta_t = 18.269 [sec])
Background time interval of the image:
-201.839 -159.330 (delta_t = 42.509 [sec])
-158.240 -3.208 (delta_t = 155.032 [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 -3.208 sec. to 354.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23952 ( -0.180145 0.177985 )
Norm@50keV : 6.20706E-04 ( -6.21284e-05 6.21095e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.25 using 59 PHA bins.
# Reduced chi-squared = 1.320 for 57 degrees of freedom
# Null hypothesis probability = 5.308242e-02
Photon flux (15-150 keV) in 357.6 sec: 7.32893E-02 ( -0.00753822 0.00755851 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.22762e-06 ( -2.49183e-07 2.51268e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.208 sec. to 354.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.07718 ( -0.729808 0.456681 )
Epeak [keV] : 302.357 ( -302.358 -302.358 )
Norm@50keV : 7.42955E-04 ( -0.000742954 0.000882132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.07 using 59 PHA bins.
# Reduced chi-squared = 1.340 for 56 degrees of freedom
# Null hypothesis probability = 4.535740e-02
Photon flux (15-150 keV) in 357.6 sec: 7.27461E-02 ( -0.0078415 0.0078314 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20358e-06 ( -2.72391e-07 2.67488e-07 ) ergs/cm2
Band function
Time interval is from -3.208 sec. to 354.360 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.368642 ( 0.649487 0.649487 )
beta : -1.33252 ( 1.3165 0.239847 )
Epeak [keV] : 67.0134 ( -67.8846 652.259 )
Norm@50keV : 2.10637E-03 ( -0.00211486 34611.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.74 using 59 PHA bins.
# Reduced chi-squared = 1.359 for 55 degrees of freedom
# Null hypothesis probability = 3.950515e-02
Photon flux (15-150 keV) in 357.6 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] : 17.8750 (-2.41932 2.96023)
R^2/D10^2 : 4.76410E-03 (-0.00189105 0.00300132)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.25 using 59 PHA bins.
# Reduced chi-squared = 1.689 for 57 degrees of freedom
# Null hypothesis probability = 8.939692e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.092e-07 2.362e-08
25- 50 5.025e-07 7.831e-08
50-150 1.163e-06 2.178e-07
15-150 1.775e-06 2.560e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-30.9255 -200)
Norm : 0.303116 (-0.0307888 0.0307888)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.699e-07 1.492e-07
25- 50 5.191e-07 2.743e-07
50-150 1.139e-06 5.798e-07
15-150 1.928e-06 8.513e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.02116 (-2.63394 2.82599)
R1^2/D10^2 : 3.04173E-02 (-0.0172375 0.0576433)
kT2 [keV] : 38.1968 (-12.7221 55.8344)
R2^2/D10^2 : 3.27294E-04 (-0.000290842 0.000912228)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.953e-07 9.502e-08
25- 50 5.213e-07 2.607e-07
50-150 1.523e-06 8.014e-07
15-150 2.239e-06 1.041e-06
Peak spectrum fit
Power-law model
Time interval is from 0.036 sec. to 1.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00027 ( -0.135873 0.133824 )
Norm@50keV : 2.86368E-02 ( -0.0023518 0.00234951 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.31 using 59 PHA bins.
# Reduced chi-squared = 0.8826 for 57 degrees of freedom
# Null hypothesis probability = 7.224631e-01
Photon flux (15-150 keV) in 1 sec: 3.29741 ( -0.269315 0.269665 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.09641e-07 ( -2.75946e-08 2.75909e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.036 sec. to 1.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.312028 ( -0.656928 0.564202 )
Epeak [keV] : 139.238 ( -42.3636 324.209 )
Norm@50keV : 5.88018E-02 ( -0.025733 0.0545663 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.85 using 59 PHA bins.
# Reduced chi-squared = 0.8188 for 56 degrees of freedom
# Null hypothesis probability = 8.313549e-01
Photon flux (15-150 keV) in 1 sec: 3.23322 ( -0.28064 0.27996 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.01354e-07 ( -2.9731e-08 2.9478e-08 ) ergs/cm2
Band function
Time interval is from 0.036 sec. to 1.036 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99996 ( -4.99996 -4.99996 )
beta : -1.10724 ( -0.244707 0.16049 )
Epeak [keV] : 31.4014 ( -31.4014 7.62288 )
Norm@50keV : 530.228 ( -43.1701 4.73072e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.83 using 59 PHA bins.
# Reduced chi-squared = 0.8879 for 55 degrees of freedom
# Null hypothesis probability = 7.079510e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.2389 (-2.10651 2.43689)
R^2/D10^2 : 0.135972 (-0.0395395 0.0534525)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.153e-08 1.879e-09
25- 50 5.969e-08 6.950e-09
50-150 2.009e-07 2.805e-08
15-150 2.721e-07 3.165e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.7138 -200)
Norm : 13.0982 (-1.1263 1.1263)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.261e-08 3.825e-09
25- 50 6.273e-08 1.391e-08
50-150 1.376e-07 6.478e-08
15-150 2.329e-07 8.114e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.44961 (-4.40361 6.46537)
R1^2/D10^2 : 0.774077 (-0.519055 4.28115)
kT2 [keV] : 31.3444 (-7.84779 83.1801)
R2^2/D10^2 : 3.24834E-02 (-0.0308375 0.0588033)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.863e-08 9.868e-09
25- 50 6.204e-08 2.820e-08
50-150 2.217e-07 1.106e-07
15-150 3.024e-07 1.281e-07
Plot creation:
Mon Oct 17 20:00:30 EDT 2022