batgrbproduct analysis for trigger=1093592
batgrbproduct Analysis for Trigger=1093592
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): Tue Jan 18 19:58:08 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1093592/GCN5_download_cron
======================================================================
Trigger: 01093592 Segment: 000
BAT Trigger Time: 664129160 [s; MET]
Trigger Stop: 664129240 [s; MET]
UTC: 2022-01-17T16:18:51.546080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 91.5781045785567 Dec: -28.409970599826 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.06
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.06
Flight Position: [ source = BAT ]
RA: 91.5781045785567 Dec: -28.409970599826 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 91.5916391330291 Dec: -28.4023800518058 [deg; J2000]
{ 06h 06m 22.0s , -28d 24' 08.6" }
+/- 1.65567021126537 [arcmin] (estimated 90% radius based on SNR)
+/- 1.14324380078147 [arcmin] (formal 1-sigma fit error)
SNR: 14.801257549145
Angular difference between Flight and Ground position is 0.847136 arcmin
Partial Coding Fraction: 0.2695312 [ including projection effects ]
Duration
T90: 51.7440000772476 +/- 3.43109539251823
Measured from: 15.3520001173019
to: 67.0960001945496 [s; relative to TRIGTIME]
T50: 24.3040001392365 +/- 13.6805356181616
Measured from: 25.9760000705719
to: 50.2800002098083 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 14.8120000362396
to: 15.8120000362396 [s; relative to TRIGTIME]
Total Fluence
Measured from: 14.7920000553131
to: 69.9759999513626 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.019964 1.152974 0.683236 0.146788
0.101828 0.105057 0.090697 0.077331 [error]
Peak 0.049910 0.100442 0.078544 0.014155
0.015936 0.016983 0.014528 0.011386 [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 3.28e-07 4.83e-07 5.31e-07 1.10e-06 1.68e-06 2.44e-06 erg/cm2
Error 4.81e-08 4.90e-08 8.53e-08 3.50e-07 2.01e-07 4.40e-07 erg/cm2
Peak flux Power-law 6.77e-01 6.27e-01 4.02e-01 3.97e-01 1.87e+00 2.10e+00 ph/cm2/s
Error 2.11e-01 1.34e-01 1.05e-01 1.95e-01 3.94e-01 4.38e-01 ph/cm2/s
Fluence Cutoff-PL 3.07e-07 5.29e-07 5.23e-07 3.49e-07 1.57e-06 1.71e-06 erg/cm2
Error 5.35e-08 6.77e-08 9.86e-08 5.41e-07 2.23e-07 5.36e-07 erg/cm2
Peak flux Cutoff-PL 4.75e-01 7.33e-01 4.88e-01 1.17e-01 1.79e+00 1.81e+00 ph/cm2/s
Error 3.74e-01 1.71e-01 1.41e-01 1.61e-01 4.07e-01 4.29e-01 ph/cm2/s
Fluence Band 3.03e-07 5.30e-07 5.14e-07 5.37e-07 1.57e-06 1.89e-06 erg/cm2
Error 5.33e-08 5.56e-08 1.11e-07 -------- -------- -------- erg/cm2
Peak flux Band 5.09e-01 7.18e-01 4.84e-01 -------- 1.82e+00 1.86e+00 ph/cm2/s
Error -------- -------- 1.38e-01 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.863 0.179 - - 3.36e-03 4.00e-04 64.940 57
CPL 1.137 0.796 51.0 111.2 8.71e-03 1.19e-02 61.980 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.641 0.315 - - 1.44e-02 3.11e-03 61.460 57
CPL -0.162 1.859 62.6 32.4 1.10e-01 5.99e-01 56.830 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: 32.512000 sec.
T50 in the 50-300 keV band: 27.648000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 55.184 14.792 69.976
T90 51.744 15.352 67.096
T50 24.304 25.976 50.280
Peak 1.000 14.812 15.812
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
91.5916 -28.4024 0.0130 32.7 84.7 3.2215 14.8 TRIG_01093592
------------------------------------------
Foreground time interval of the image:
14.792 68.050 (delta_t = 53.258 [sec])
69.000 69.976 (delta_t = 0.976 [sec])
Background time interval of the image:
-239.000 14.792 (delta_t = 253.792 [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
Multiple GTIs in the spectrum
tstart tstop
14.792000 68.050000
69.000000 69.976000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86309 ( -0.175572 0.182651 )
Norm@50keV : 3.36144E-03 ( -0.000404032 0.000396932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.94 using 59 PHA bins.
# Reduced chi-squared = 1.139 for 57 degrees of freedom
# Null hypothesis probability = 2.196167e-01
Photon flux (15-150 keV) in 54.23 sec: 0.475019 ( -0.0484843 0.0485012 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6759e-06 ( -1.9904e-07 2.02172e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
14.792000 68.050000
69.000000 69.976000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13685 ( -0.870013 0.721578 )
Epeak [keV] : 50.9541 ( -12.8723 209.54 )
Norm@50keV : 8.71286E-03 ( -0.00525189 0.0185097 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.98 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 56 degrees of freedom
# Null hypothesis probability = 2.713934e-01
Photon flux (15-150 keV) in 54.23 sec: 0.463914 ( -0.049712 0.049714 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.56669e-06 ( -2.18612e-07 2.27712e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
14.792000 68.050000
69.000000 69.976000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98881 ( -6.30855 -4.98881 )
beta : -2.06221 ( -0.290616 0.225678 )
Epeak [keV] : 24.2209 ( -4.41605 3.53265 )
Norm@50keV : 610.435 ( -61.3081 1671.14 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.38 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 55 degrees of freedom
# Null hypothesis probability = 3.191811e-01
Photon flux (15-150 keV) in 54.23 sec: 0.468122 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.57288e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 10.9172 (-1.31451 1.48228)
R^2/D10^2 : 0.162557 (-0.0619437 0.100937)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.82 using 59 PHA bins.
# Reduced chi-squared = 1.400 for 57 degrees of freedom
# Null hypothesis probability = 2.471228e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.192e-07 3.997e-08
25- 50 6.138e-07 7.801e-08
50-150 4.108e-07 1.085e-07
15-150 1.244e-06 1.714e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 83.2279 (-23.5519 41.341)
Norm : 2.22025 (-0.317174 0.382202)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.132e-07 4.520e-08
25- 50 5.204e-07 5.719e-08
50-150 7.541e-07 3.425e-07
15-150 1.588e-06 3.270e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.61908 (-1.44553 1.9364)
R1^2/D10^2 : 1.24096 (-0.777959 1.97951)
kT2 [keV] : 18.0746 (-4.08535 8.97157)
R2^2/D10^2 : 1.79064E-02 (-0.0144136 0.022641)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.188e-07 1.630e-07
25- 50 5.143e-07 2.193e-07
50-150 7.138e-07 4.021e-07
15-150 1.547e-06 6.024e-07
Peak spectrum fit
Power-law model
Time interval is from 14.812 sec. to 15.812 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.64099 ( -0.305509 0.324469 )
Norm@50keV : 1.43595E-02 ( -0.00313297 0.00309395 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.46 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.194045e-01
Photon flux (15-150 keV) in 1 sec: 1.86944 ( -0.393556 0.394375 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.33677e-07 ( -3.02405e-08 3.05797e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 14.812 sec. to 15.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.162086 ( -2.24564 1.4729 )
Epeak [keV] : 62.6052 ( -14.4058 50.3766 )
Norm@50keV : 0.109883 ( -0.109878 1.08858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.83 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.439728e-01
Photon flux (15-150 keV) in 1 sec: 1.79092 ( -0.40892 0.40547 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28937e-07 ( -3.02339e-08 3.1247e-08 ) ergs/cm2
Band function
Time interval is from 14.812 sec. to 15.812 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.161889 ( -1.1789 2.66884 )
beta : -10.0000 ( 10 1.06581e-14 )
Epeak [keV] : 62.5811 ( -14.3751 50.5335 )
Norm@50keV : 0.109919 ( -0.109919 1.13591 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.83 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.067364e-01
Photon flux (15-150 keV) in 1 sec: 1.82322 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28881e-07 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.1154 (-2.81284 3.43366)
R^2/D10^2 : 0.224131 (-0.118202 0.241716)
(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 1.071e-08 4.177e-09
25- 50 4.284e-08 1.485e-08
50-150 6.685e-08 2.657e-08
15-150 1.204e-07 3.941e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 149.726 (-74.7795 -147.482)
Norm : 7.89673 (-1.73364 2.21121)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.028e-08 1.176e-08
25- 50 3.759e-08 2.086e-08
50-150 7.414e-08 4.566e-08
15-150 1.320e-07 7.655e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.07432 (-3.08044 12.9534)
R1^2/D10^2 : 39.1848 (-38.9396 447.416)
kT2 [keV] : 16.5083 (-3.36585 -16.5107)
R2^2/D10^2 : 0.154462 (-0.154365 0.205174)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.715e-08 8.317e-09
25- 50 3.868e-08 2.163e-08
50-150 7.192e-08 4.376e-08
15-150 1.277e-07 7.080e-08
Plot creation:
Tue Jan 18 20:04:31 EST 2022