batgrbproduct analysis for trigger=1093860
batgrbproduct Analysis for Trigger=1093860
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): Sat Feb 19 19:07:31 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1093860/GCN5_download_cron
======================================================================
Trigger: 01093860 Segment: 000
BAT Trigger Time: 666916168 [s; MET]
Trigger Stop: 666916232 [s; MET]
UTC: 2022-02-18T22:28:59.357780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 133.830146896997 Dec: 31.9839890538763 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.61
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.61
Flight Position: [ source = BAT ]
RA: 133.830146896997 Dec: 31.9839890538763 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 133.810849397303 Dec: 31.9664254341173 [deg; J2000]
{ 08h 55m 14.6s , +31d 57' 59.1" }
+/- 1.5534043183762 [arcmin] (estimated 90% radius based on SNR)
+/- 0.568357675215151 [arcmin] (formal 1-sigma fit error)
SNR: 16.2126794810436
Angular difference between Flight and Ground position is 1.440557 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 270.223999977112 +/- 48.3719876288306
Measured from: 42.9160001277924
to: 313.140000104904 [s; relative to TRIGTIME]
T50: 133.927999973297 +/- 15.1976630646457
Measured from: 86.9800001382828
to: 220.90800011158 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 183.240000009537
to: 184.240000009537 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.7519999742508
to: 368.475999951363 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.530787 2.689889 1.810341 0.421297
0.131465 0.135084 0.117521 0.101483 [error]
Peak 0.026679 0.042609 0.019890 0.011786
0.007416 0.007496 0.007051 0.005963 [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 7.06e-07 1.13e-06 1.36e-06 3.20e-06 4.11e-06 6.39e-06 erg/cm2
Error 6.71e-08 6.43e-08 1.17e-07 5.85e-07 2.68e-07 6.81e-07 erg/cm2
Peak flux Power-law 2.79e-01 2.48e-01 1.52e-01 1.42e-01 7.40e-01 8.21e-01 ph/cm2/s
Error 9.58e-02 5.75e-02 5.54e-02 1.03e-01 1.71e-01 2.01e-01 ph/cm2/s
Fluence Cutoff-PL 7.00e-07 1.14e-06 1.36e-06 2.85e-06 4.09e-06 6.01e-06 erg/cm2
Error 7.55e-08 7.42e-08 1.16e-07 1.15e-06 3.00e-07 1.06e-06 erg/cm2
Peak flux Cutoff-PL 2.80e-01 2.48e-01 1.51e-01 1.30e-01 7.39e-01 8.03e-01 ph/cm2/s
Error 7.44e-02 5.75e-02 4.85e-02 1.40e-01 1.71e-01 2.35e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.43e-01 1.64e-01 1.36e-01 1.87e-01 5.10e-01 6.28e-01 ph/cm2/s
Error 8.96e-02 6.11e-02 5.43e-02 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.731 0.109 - - 1.31e-03 8.08e-05 54.090 57
CPL 1.666 0.390 221.2 0.0 1.41e-03 0.00e+00 54.010 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.705 0.435 - - 5.56e-03 1.54e-03 70.030 57
CPL 1.654 3.477 271.5 -1.8 5.97e-03 0.00e+00 70.040 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: 235.200000 sec.
T50 in the 50-300 keV band: 119.296000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 342.724 25.752 368.476
T90 270.224 42.916 313.140
T50 133.928 86.980 220.908
Peak 1.000 183.240 184.240
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
133.8108 +31.9664 0.0119 13.2 19.0 5.9876 16.2 TRIG_01093860
------------------------------------------
Foreground time interval of the image:
25.752 135.570 (delta_t = 109.818 [sec])
137.000 197.130 (delta_t = 60.130 [sec])
198.000 368.476 (delta_t = 170.476 [sec])
Background time interval of the image:
-239.000 25.752 (delta_t = 264.752 [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
25.752000 135.570000
137.000000 197.130000
198.000000 368.476000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.73125 ( -0.108374 0.110036 )
Norm@50keV : 1.30790E-03 ( -8.121e-05 8.04603e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.09 using 59 PHA bins.
# Reduced chi-squared = 0.9489 for 57 degrees of freedom
# Null hypothesis probability = 5.850736e-01
Photon flux (15-150 keV) in 340.4 sec: 0.175643 ( -0.0101039 0.0101242 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11285e-06 ( -2.66537e-07 2.68958e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
25.752000 135.570000
137.000000 197.130000
198.000000 368.476000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66639 ( -0.423139 0.356748 )
Epeak [keV] : 221.176 ( )
Norm@50keV : 1.41352E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.01 using 59 PHA bins.
# Reduced chi-squared = 0.9645 for 56 degrees of freedom
# Null hypothesis probability = 5.504216e-01
Photon flux (15-150 keV) in 340.4 sec: 0.174964 ( -0.010885 0.010567 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.08899e-06 ( -3.10955e-07 2.89102e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
25.752000 135.570000
137.000000 197.130000
198.000000 368.476000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.780461 ( 1.44779 1.44779 )
beta : -1.74973 ( 1.73798 0.113262 )
Epeak [keV] : 23.1118 ( -31.6554 134.494 )
Norm@50keV : 0.147132 ( -0.147048 271.471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.85 using 59 PHA bins.
# Reduced chi-squared = 0.9791 for 55 degrees of freedom
# Null hypothesis probability = 5.185140e-01
Photon flux (15-150 keV) in 340.4 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] : 12.8882 ( )
R^2/D10^2 : 3.13683E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 137.86 using 59 PHA bins.
# Reduced chi-squared = 2.4186 for 57 degrees of freedom
# Null hypothesis probability = 1.192597e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.762e-07 4.012e-08
25- 50 1.284e-06 9.276e-08
50-150 1.341e-06 1.741e-07
15-150 3.001e-06 2.083e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 133.786 (-33.8244 43.8101)
Norm : 0.717566 (-0.0496314 0.0638914)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.327e-07 5.412e-08
25- 50 1.152e-06 1.011e-07
50-150 2.165e-06 7.150e-07
15-150 3.950e-06 8.166e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.37826 (-0.886523 1.04532)
R1^2/D10^2 : 0.538513 (-0.26517 0.594979)
kT2 [keV] : 21.3474 (-2.94051 4.24297)
R2^2/D10^2 : 4.14873E-03 (-0.00202836 0.00311697)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.124e-07 1.544e-07
25- 50 1.087e-06 1.450e-07
50-150 2.158e-06 4.578e-07
15-150 3.958e-06 6.878e-07
Peak spectrum fit
Power-law model
Time interval is from 183.240 sec. to 184.240 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70492 ( -0.419786 0.450336 )
Norm@50keV : 5.55933E-03 ( -0.00157538 0.00150394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.03 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.151522e-01
Photon flux (15-150 keV) in 1 sec: 0.739613 ( -0.171093 0.171093 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.14533e-08 ( -1.46715e-08 1.55224e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 183.240 sec. to 184.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65376 ( -5.4216 1.53261 )
Epeak [keV] : 271.495 ( -340.187 -343.857 )
Norm@50keV : 5.96887E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.04 using 59 PHA bins.
# Reduced chi-squared = 1.251 for 56 degrees of freedom
# Null hypothesis probability = 9.828322e-02
Photon flux (15-150 keV) in 1 sec: 0.739401 ( -0.171088 0.171033 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.1388e-08 ( -2.32096e-08 1.11806e-08 ) ergs/cm2
Band function
Time interval is from 183.240 sec. to 184.240 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.64843 ( -4.64843 -4.64843 )
beta : -2.35299 ( -1.63594 0.772897 )
Epeak [keV] : 31.0119 ( -7.93492 6.96489 )
Norm@50keV : 122.781 ( -28.0537 5.35059e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.77 using 59 PHA bins.
# Reduced chi-squared = 1.250 for 55 degrees of freedom
# Null hypothesis probability = 1.004054e-01
Photon flux (15-150 keV) in 1 sec: 0.510298 ( ) 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] : 9.49705 (-2.07343 3.005)
R^2/D10^2 : 0.428228 (-0.276685 0.655678)
(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 7.713e-09 3.648e-09
25- 50 1.779e-08 8.721e-09
50-150 7.982e-09 5.212e-09
15-150 3.349e-08 1.501e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8789 (-55.8472 -99.9194)
Norm : 3.27121 (-0.914196 1.31013)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.550e-09 4.045e-09
25- 50 1.478e-08 8.965e-09
50-150 2.394e-08 1.872e-08
15-150 4.727e-08 3.108e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.20817 (-1.92662 2.1707)
R1^2/D10^2 : 0.672714 (-0.412767 1.07685)
kT2 [keV] : 199.360 (-199.363 -199.363)
R2^2/D10^2 : 9.04117E-05 (-6.19945e-05 0.00411934)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.464e-09 5.028e-09
25- 50 1.625e-08 9.615e-09
50-150 2.830e-08 6.215e-09
15-150 5.302e-08 2.124e-08
Plot creation:
Sat Feb 19 19:16:23 EST 2022