batgrbproduct analysis for trigger=1069169
batgrbproduct Analysis for Trigger=1069169
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): Wed Aug 18 16:05:04 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1069169/batgroup_hand_proc
======================================================================
Trigger: 01069169 Segment: 000
BAT Trigger Time: 650941355.764 [s; MET]
Trigger Stop: 650941355.828 [s; MET]
UTC: 2021-08-18T01:02:08.196640 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 149.131388407691 Dec: -87.0315890774405 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.11
Image Trigger?: NO
Rate S/N Ratio: 96.4779767615387 [ if not an image trigger ]
Image S/N Ratio: 9.11
Flight Position: [ source = BAT ]
RA: 149.131388407691 Dec: -87.0315890774405 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 148.948595762004 Dec: -87.0292616276439 [deg; J2000]
{ 09h 55m 47.7s , -87d 01' 45.3" }
+/- 0.479568670434412 [arcmin] (estimated 90% radius based on SNR)
+/- 0.151576974565793 [arcmin] (formal 1-sigma fit error)
SNR: 86.9052080444756
Angular difference between Flight and Ground position is 0.585091 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 73.5599999427795 +/- 1.54805687515991
Measured from: 1.66399991512299
to: 75.2239998579025 [s; relative to TRIGTIME]
T50: 32.2879999876022 +/- 0.515565740328432
Measured from: 9.36799991130829
to: 41.6559998989105 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.19599997997284
to: 2.19599997997284 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.688000082969666
to: 128.971999883652 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.279250 13.660438 12.173122 4.120346
0.086704 0.094955 0.090094 0.076827 [error]
Peak 0.221087 0.463600 0.558387 0.253144
0.010621 0.013963 0.015747 0.014369 [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 2.56e-06 5.58e-06 9.58e-06 3.80e-05 2.62e-05 5.57e-05 erg/cm2
Error 8.46e-08 1.07e-07 1.28e-07 1.28e-06 3.37e-07 1.28e-06 erg/cm2
Peak flux Power-law 1.93e+00 3.07e+00 3.68e+00 8.63e+00 1.12e+01 1.73e+01 ph/cm2/s
Error 1.43e-01 1.34e-01 1.26e-01 6.92e-01 3.62e-01 7.19e-01 ph/cm2/s
Fluence Cutoff-PL 2.57e-06 5.60e-06 9.58e-06 3.75e-05 2.62e-05 5.52e-05 erg/cm2
Error 7.27e-08 1.04e-07 1.24e-07 1.28e-06 3.39e-07 1.19e-06 erg/cm2
Peak flux Cutoff-PL 1.93e+00 3.07e+00 3.68e+00 8.54e+00 1.12e+01 1.72e+01 ph/cm2/s
Error -------- 1.34e-01 -------- -------- 3.62e-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 1.220 0.026 - - 2.01e-02 2.85e-04 48.110 57
CPL 1.216 0.027 10000.0 0.0 2.01e-02 2.72e-04 48.800 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.737 0.061 - - 9.69e-02 3.22e-03 63.300 57
CPL 0.733 0.062 9999.4 0.0 9.75e-02 7.60e-03 63.460 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: 62.848000 sec.
T50 in the 50-300 keV band: 26.752000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 129.660 -0.688 128.972
T90 73.560 1.664 75.224
T50 32.288 9.368 41.656
Peak 1.000 1.196 2.196
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
148.9486 -87.0293 0.0022 17.6 9.4 9.7026 86.9 TRIG_01069169
------------------------------------------
Foreground time interval of the image:
-0.688 9.137 (delta_t = 9.825 [sec])
Background time interval of the image:
-239.764 -201.159 (delta_t = 38.605 [sec])
-198.764 -0.688 (delta_t = 198.076 [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 -0.688 sec. to 128.972 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22048 ( -0.0262442 0.0261409 )
Norm@50keV : 2.00586E-02 ( -0.000285298 0.000283925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.11 using 59 PHA bins.
# Reduced chi-squared = 0.8440 for 57 degrees of freedom
# Null hypothesis probability = 7.931203e-01
Photon flux (15-150 keV) in 129.7 sec: 2.36148 ( -0.0382569 0.0384688 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62441e-05 ( -3.37433e-07 3.37457e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.688 sec. to 128.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21551 ( -0.026297 0.0269858 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.01496E-02 ( -0.000284901 0.000258161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.80 using 59 PHA bins.
# Reduced chi-squared = 0.8714 for 56 degrees of freedom
# Null hypothesis probability = 7.415674e-01
Photon flux (15-150 keV) in 129.7 sec: 2.35982 ( -0.03644 0.0384 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.62462e-05 ( -3.36442e-07 3.40852e-07 ) ergs/cm2
Band function
Time interval is from -0.688 sec. to 128.972 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.909358 ( 0.911229 5.90479 )
beta : -1.22047 ( -0.0261544 0.0262439 )
Epeak [keV] : 57.1839 ( -55.6886 -55.6886 )
Norm@50keV : 3.87939E-02 ( -0.0120792 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.11 using 59 PHA bins.
# Reduced chi-squared = 0.8747 for 55 degrees of freedom
# Null hypothesis probability = 7.331173e-01
Photon flux (15-150 keV) in 129.7 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] : 23.3702 ( )
R^2/D10^2 : 6.20473E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 1327.19 using 59 PHA bins.
# Reduced chi-squared = 23.2840 for 57 degrees of freedom
# Null hypothesis probability = 4.647463e-240
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.904e-07 2.192e-08
25- 50 4.326e-06 1.051e-07
50-150 1.764e-05 2.853e-07
15-150 2.275e-05 3.048e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 10.5949 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.422e-06 5.642e-08
25- 50 6.582e-06 9.598e-08
50-150 1.444e-05 2.205e-07
15-150 2.444e-05 3.826e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.99240 (-0.46806 0.4887)
R1^2/D10^2 : 0.950497 (-0.154079 0.190822)
kT2 [keV] : 40.8825 (-2.39765 2.86706)
R2^2/D10^2 : 9.04433E-03 (-0.00165718 0.00184486)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.189e-06 1.115e-07
25- 50 5.828e-06 1.388e-07
50-150 1.835e-05 4.086e-07
15-150 2.636e-05 5.447e-07
Peak spectrum fit
Power-law model
Time interval is from 1.196 sec. to 2.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.736924 ( -0.0615724 0.0609651 )
Norm@50keV : 9.68852E-02 ( -0.00323207 0.00321675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.111 for 57 degrees of freedom
# Null hypothesis probability = 2.637560e-01
Photon flux (15-150 keV) in 1 sec: 11.1698 ( -0.361521 0.361752 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16332e-06 ( -4.227e-08 4.24811e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.196 sec. to 2.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.733203 ( -0.0654256 0.058628 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 9.74779E-02 ( -0.00327907 0.0119158 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.46 using 59 PHA bins.
# Reduced chi-squared = 1.133 for 56 degrees of freedom
# Null hypothesis probability = 2.303146e-01
Photon flux (15-150 keV) in 1 sec: 11.1686 ( -0.3637 0.3597 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.16323e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 1.196 sec. to 2.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.905406 ( 0.905406 0.905406 )
beta : -0.736922 ( -0.0609408 0.0616156 )
Epeak [keV] : 15.7833 ( -15.7833 -15.7833 )
Norm@50keV : 0.136208 ( -0.0425016 1.72502e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Null hypothesis probability = 2.067201e-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] : 26.3917 ( )
R^2/D10^2 : 0.242021 ( )
(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 2.843e-08 1.940e-09
25- 50 1.657e-07 7.850e-09
50-150 8.475e-07 4.555e-08
15-150 1.042e-06 4.665e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 41.9179 ( )
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.044e-07 3.850e-09
25- 50 2.008e-07 7.850e-09
50-150 4.404e-07 1.695e-08
15-150 7.455e-07 2.535e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.7482 (-1.71525 1.91371)
R1^2/D10^2 : 1.93775 (-0.650006 1.15767)
kT2 [keV] : 58.1661 (-12.8317 30.7595)
R2^2/D10^2 : 2.50890E-02 (-0.0150617 0.0221849)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.476e-08 7.465e-09
25- 50 1.890e-07 1.870e-08
50-150 9.403e-07 1.983e-07
15-150 1.184e-06 2.484e-07
Plot creation:
Wed Aug 18 16:18:30 EDT 2021