batgrbproduct analysis for trigger=1102329
batgrbproduct Analysis for Trigger=1102329
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): Fri Apr 15 15:06:47 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1102329/GCN5_download_cron
======================================================================
Trigger: 01102329 Segment: 000
BAT Trigger Time: 671476037.984 [s; MET]
Trigger Stop: 671476038.016 [s; MET]
UTC: 2022-04-12T17:06:49.033660 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 320.794376319468 Dec: -0.223218895688613 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.88
Image Trigger?: NO
Rate S/N Ratio: 46.5617869072913 [ if not an image trigger ]
Image S/N Ratio: 8.88
Flight Position: [ source = BAT ]
RA: 320.794376319468 Dec: -0.223218895688613 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 320.758061648767 Dec: -0.260701126205347 [deg; J2000]
{ 21h 23m 01.9s , -00d 15' 38.5" }
+/- 1.64973449060032 [arcmin] (estimated 90% radius based on SNR)
+/- 0.740195473046486 [arcmin] (formal 1-sigma fit error)
SNR: 14.8773943208062
Angular difference between Flight and Ground position is 3.131316 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 0.139999985694885 +/- 0.0399999856949492
Measured from: -0.0119998455047607
to: 0.128000140190125 [s; relative to TRIGTIME]
T50: 0.059999942779541 +/- 0.020396072630595
Measured from: 0.00800013542175293
to: 0.0680000782012939 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.435999989509583
to: 0.564000010490417 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.031999945640564
to: 0.156000018119812 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.027449 0.049568 0.038460 0.019151
0.004087 0.005170 0.005151 0.004132 [error]
Peak 0.026777 0.044468 0.033937 0.023522
0.007608 0.008415 0.007897 0.006731 [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 8.21e-09 1.85e-08 3.28e-08 1.37e-07 8.94e-08 1.96e-07 erg/cm2
Error 1.69e-09 2.30e-09 4.84e-09 4.47e-08 1.23e-08 4.82e-08 erg/cm2
Peak flux Power-law 2.08e-01 2.96e-01 3.14e-01 6.17e-01 1.01e+00 1.44e+00 ph/cm2/s
Error 9.61e-02 7.90e-02 6.29e-02 3.17e-01 1.96e-01 3.15e-01 ph/cm2/s
Fluence Cutoff-PL 8.22e-09 1.85e-08 3.28e-08 1.35e-07 8.93e-08 1.95e-07 erg/cm2
Error 1.79e-09 2.43e-09 4.93e-09 8.21e-08 1.24e-08 5.61e-08 erg/cm2
Peak flux Cutoff-PL 2.20e-01 3.04e-01 3.11e-01 5.72e-01 1.02e+00 1.41e+00 ph/cm2/s
Error 9.70e-02 8.00e-02 6.36e-02 3.35e-01 1.98e-01 3.29e-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 1.172 0.203 - - 4.65e-02 5.42e-03 62.590 57
CPL 1.167 0.440 10000.0 0.0 4.67e-02 0.00e+00 62.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.915 0.402 - - 8.80e-03 1.71e-03 59.550 57
CPL 0.912 0.455 10000.0 0.0 8.86e-03 -3.56e-03 59.590 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.188 -0.032 0.156
T90 0.140 -0.012 0.128
T50 0.060 0.008 0.068
Peak 1.000 -0.436 0.564
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
320.7581 -0.2607 0.0130 23.1 36.8 0.1406 14.9 TRIG_01102329
------------------------------------------
Foreground time interval of the image:
-0.032 0.156 (delta_t = 0.188 [sec])
Background time interval of the image:
-239.984 -136.694 (delta_t = 103.290 [sec])
-135.984 -56.814 (delta_t = 79.170 [sec])
-55.984 -0.032 (delta_t = 55.952 [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 -0.032 sec. to 0.156 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.17162 ( -0.202607 0.202676 )
Norm@50keV : 4.64891E-02 ( -0.00542394 0.00541019 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.846649e-01
Photon flux (15-150 keV) in 0.188 sec: 5.43607 ( -0.629447 0.629594 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93974e-08 ( -1.22167e-08 1.23643e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16743 ( -0.631807 0.247872 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 4.67203E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.59 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 56 degrees of freedom
# Null hypothesis probability = 2.538146e-01
Photon flux (15-150 keV) in 0.188 sec: 5.43663 ( -0.63124 0.62782 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.93481e-08 ( -1.25185e-08 1.23195e-08 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.156 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.298164 ( 0.691795 0.691795 )
beta : -1.25194 ( 1.23997 0.260232 )
Epeak [keV] : 64.2575 ( -63.809 218.955 )
Norm@50keV : 0.169096 ( -0.176889 1587.93 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.28 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 55 degrees of freedom
# Null hypothesis probability = 2.331606e-01
Photon flux (15-150 keV) in 0.188 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] : 16.6668 (-2.69721 3.49529)
R^2/D10^2 : 0.451280 (-0.206992 0.354086)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.78 using 59 PHA bins.
# Reduced chi-squared = 1.452 for 57 degrees of freedom
# Null hypothesis probability = 1.445548e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.825e-09 1.042e-09
25- 50 2.101e-08 3.688e-09
50-150 4.140e-08 9.917e-09
15-150 6.723e-08 1.188e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-35.9359 -200)
Norm : 21.5929 (-2.56188 2.56188)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.015e-08 5.644e-09
25- 50 1.953e-08 1.086e-08
50-150 4.284e-08 2.356e-08
15-150 7.253e-08 3.996e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.36381 (-2.80964 3.15834)
R1^2/D10^2 : 2.13326 (-0.9732 2.30879)
kT2 [keV] : 50.0625 (-39.5228 -71.594)
R2^2/D10^2 : 1.16115E-02 (-0.0046372 0.0385305)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.575e-09 4.238e-09
25- 50 2.008e-08 9.823e-09
50-150 5.956e-08 3.386e-08
15-150 8.721e-08 4.492e-08
Peak spectrum fit
Power-law model
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.915266 ( -0.423876 0.380573 )
Norm@50keV : 8.80486E-03 ( -0.00174156 0.001674 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.830984e-01
Photon flux (15-150 keV) in 1 sec: 1.01077 ( -0.195743 0.196345 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.82305e-08 ( -2.0033e-08 2.01792e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.912471 ( -0.562967 0.34668 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 8.86441E-03 ( -0.00174596 -0.00886434 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.59 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 56 degrees of freedom
# Null hypothesis probability = 3.465230e-01
Photon flux (15-150 keV) in 1 sec: 1.01848 ( -0.20586 0.18974 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.75552e-08 ( -1.94541e-08 1.91778e-08 ) ergs/cm2
Band function
Time interval is from -0.436 sec. to 0.564 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.99999 ( 9.99999 9.99999 )
beta : -0.915186 ( -0.380498 0.423836 )
Epeak [keV] : 13.8158 ( -13.8158 -13.8158 )
Norm@50keV : 1.19669 ( -0.236728 0.227525 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 55 degrees of freedom
# Null hypothesis probability = 3.137189e-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] : 30.7979 (-11.7383 27.9989)
R^2/D10^2 : 1.27810E-02 (-0.00994354 0.0392992)
(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 1.866e-09 9.480e-10
25- 50 1.163e-08 5.883e-09
50-150 7.711e-08 3.416e-08
15-150 9.061e-08 3.703e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-56.6158 -200)
Norm : 4.12018 (-0.800931 0.800931)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.026e-08 5.965e-09
25- 50 1.974e-08 1.148e-08
50-150 4.328e-08 2.528e-08
15-150 7.328e-08 4.235e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.15610 (-2.77798 3.47527)
R1^2/D10^2 : 0.430840 (-0.255086 1.37663)
kT2 [keV] : 199.363 (-199.363 -199.363)
R2^2/D10^2 : 2.65333E-04 (-7.2894e-05 0.00163907)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.433e-09 4.468e-09
25- 50 1.837e-08 1.045e-08
50-150 7.648e-08 3.616e-08
15-150 1.023e-07 3.942e-08
Plot creation:
Fri Apr 15 15:22:30 EDT 2022