batgrbproduct analysis for trigger=1123129
batgrbproduct Analysis for Trigger=1123129
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): Thu Sep 8 15:10:19 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1123129/GCN5_download_cron
======================================================================
Trigger: 01123129 Segment: 000
BAT Trigger Time: 684252355.584 [s; MET]
Trigger Stop: 684252356.608 [s; MET]
UTC: 2022-09-07T14:05:25.767040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 268.870001475522 Dec: -20.3153434089484 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.52
Image Trigger?: NO
Rate S/N Ratio: 13.9642400437689 [ if not an image trigger ]
Image S/N Ratio: 8.52
Flight Position: [ source = BAT ]
RA: 268.870001475522 Dec: -20.3153434089484 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.869083330483 Dec: -20.3030080178047 [deg; J2000]
{ 17h 55m 28.6s , -20d 18' 10.8" }
+/- 1.86829387426196 [arcmin] (estimated 90% radius based on SNR)
+/- 0.915152412644527 [arcmin] (formal 1-sigma fit error)
SNR: 12.4548797071696
Angular difference between Flight and Ground position is 0.741924 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 8.49199998378754 +/- 1.55708059122676
Measured from: 0.368000149726868
to: 8.8600001335144 [s; relative to TRIGTIME]
T50: 4.7039999961853 +/- 1.73486712398648
Measured from: 0.800000071525574
to: 5.50400006771088 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.700000047683716
to: 1.70000004768372 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.595999956130981
to: 10.2920000553131 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.115945 0.159950 0.220947 0.088373
0.027077 0.025928 0.022757 0.019778 [error]
Peak 0.027547 0.041435 0.047568 0.016393
0.008379 0.008336 0.007788 0.006684 [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 3.01e-08 7.58e-08 1.53e-07 7.71e-07 4.12e-07 1.03e-06 erg/cm2
Error 8.76e-09 1.30e-08 2.11e-08 2.57e-07 5.60e-08 2.64e-07 erg/cm2
Peak flux Power-law 2.27e-01 3.01e-01 2.93e-01 5.12e-01 9.89e-01 1.33e+00 ph/cm2/s
Error 8.78e-02 7.21e-02 5.98e-02 2.24e-01 1.95e-01 2.71e-01 ph/cm2/s
Fluence Cutoff-PL 2.56e-08 7.72e-08 1.62e-07 4.16e-07 4.02e-07 6.81e-07 erg/cm2
Error 1.19e-08 1.42e-08 2.77e-08 4.05e-07 6.04e-08 3.71e-07 erg/cm2
Peak flux Cutoff-PL 1.37e-01 3.08e-01 3.45e-01 1.75e-01 9.12e-01 9.66e-01 ph/cm2/s
Error 1.14e-01 9.12e-02 8.22e-02 2.69e-01 2.16e-01 3.35e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.55e-01 3.09e-01 3.36e-01 2.10e-01 9.33e-01 1.01e+00 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 0.990 0.240 - - 3.48e-03 4.72e-04 76.220 57
CPL 0.444 1.039 172.3 0.0 5.88e-03 0.00e+00 75.490 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.036 0.327 - - 8.57e-03 1.65e-03 71.940 57
CPL -0.587 2.336 94.9 1304.3 4.08e-02 2.49e-01 69.160 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: 6.464000 sec.
T50 in the 50-300 keV band: 4.224000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 10.888 -0.596 10.292
T90 8.492 0.368 8.860
T50 4.704 0.800 5.504
Peak 1.000 0.700 1.700
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.8691 -20.3030 0.0154 25.0 174.5 0.6225 12.5 TRIG_01123129
------------------------------------------
Foreground time interval of the image:
-0.596 10.292 (delta_t = 10.888 [sec])
Background time interval of the image:
-239.584 -86.574 (delta_t = 153.010 [sec])
-85.584 -0.596 (delta_t = 84.988 [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 -0.596 sec. to 10.292 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.990472 ( -0.245802 0.234026 )
Norm@50keV : 3.48490E-03 ( -0.000474901 0.000468993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.22 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 57 degrees of freedom
# Null hypothesis probability = 4.537951e-02
Photon flux (15-150 keV) in 10.89 sec: 0.401061 ( -0.0555994 0.0559831 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11557e-07 ( -5.56354e-08 5.63494e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.596 sec. to 10.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.444415 ( -1.42407 0.653428 )
Epeak [keV] : 172.337 ( -172.3 -172.3 )
Norm@50keV : 5.87700E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.49 using 59 PHA bins.
# Reduced chi-squared = 1.348 for 56 degrees of freedom
# Null hypothesis probability = 4.228583e-02
Photon flux (15-150 keV) in 10.89 sec: 0.389128 ( -0.061315 0.06064 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.02188e-07 ( -6.11114e-08 5.97523e-08 ) ergs/cm2
Band function
Time interval is from -0.596 sec. to 10.292 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.340895 ( 0.814947 0.814947 )
beta : -1.39608 ( 1.35072 0.561436 )
Epeak [keV] : 149.411 ( -148.846 -148.846 )
Norm@50keV : 6.57851E-03 ( -0.00248363 0.0340954 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.34 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 55 degrees of freedom
# Null hypothesis probability = 3.569284e-02
Photon flux (15-150 keV) in 10.89 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] : 22.9704 (-3.42897 4.52755)
R^2/D10^2 : 1.25604E-02 (-0.00543459 0.00860341)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.36 using 59 PHA bins.
# Reduced chi-squared = 1.392 for 57 degrees of freedom
# Null hypothesis probability = 2.678712e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.309e-08 3.577e-09
25- 50 7.095e-08 1.583e-08
50-150 2.797e-07 6.507e-08
15-150 3.637e-07 7.394e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-30.0163 -200)
Norm : 1.70110 (-0.230777 0.230777)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.615e-08 2.586e-08
25- 50 8.877e-08 4.981e-08
50-150 1.947e-07 1.081e-07
15-150 3.296e-07 1.824e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.87488 (-2.22324 5.15486)
R1^2/D10^2 : 2.44128 (-2.36983 556.14)
kT2 [keV] : 25.3759 (-4.35744 7.72868)
R2^2/D10^2 : 8.84006E-03 (-0.00485398 0.00547793)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.137e-08 1.542e-08
25- 50 6.788e-08 2.128e-08
50-150 2.910e-07 9.790e-08
15-150 3.903e-07 1.060e-07
Peak spectrum fit
Power-law model
Time interval is from 0.700 sec. to 1.700 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.03599 ( -0.334684 0.319578 )
Norm@50keV : 8.57069E-03 ( -0.0016554 0.00164568 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.94 using 59 PHA bins.
# Reduced chi-squared = 1.262 for 57 degrees of freedom
# Null hypothesis probability = 8.782590e-02
Photon flux (15-150 keV) in 1 sec: 0.988774 ( -0.194526 0.196205 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.15204e-08 ( -1.84954e-08 1.87003e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.700 sec. to 1.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.586682 ( -3.02705 1.64467 )
Epeak [keV] : 94.9282 ( -25.4664 2583.09 )
Norm@50keV : 4.08408E-02 ( -0.0409079 0.456408 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.16 using 59 PHA bins.
# Reduced chi-squared = 1.235 for 56 degrees of freedom
# Null hypothesis probability = 1.113437e-01
Photon flux (15-150 keV) in 1 sec: 0.911657 ( -0.217763 0.213573 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.53896e-08 ( -1.96012e-08 2.00234e-08 ) ergs/cm2
Band function
Time interval is from 0.700 sec. to 1.700 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.584650 ( -1.28998 3.03335 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 94.9177 ( -21.7818 151.591 )
Norm@50keV : 4.08063E-02 ( -0.0407962 0.456078 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.16 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.487382e-02
Photon flux (15-150 keV) in 1 sec: 0.933349 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 8.73428e-08 ( 0 0 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 21.6226 (-4.0051 5.5526)
R^2/D10^2 : 3.83706E-02 (-0.0199866 0.0363451)
(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 3.346e-09 1.410e-09
25- 50 1.751e-08 6.104e-09
50-150 6.113e-08 2.398e-08
15-150 8.199e-08 2.881e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-55.6492 -200)
Norm : 4.10179 (-0.810982 0.810982)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.021e-08 6.065e-09
25- 50 1.965e-08 1.126e-08
50-150 4.309e-08 2.431e-08
15-150 7.295e-08 4.230e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.31026 (-4.27158 -4.27158)
R1^2/D10^2 : 2.66135 (-3.16591 -3.16591)
kT2 [keV] : 23.3385 (-4.82914 -23.3376)
R2^2/D10^2 : 2.88516E-02 (-0.0290104 0.0336903)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.264e-09 3.403e-09
25- 50 1.700e-08 9.087e-09
50-150 6.292e-08 3.637e-08
15-150 8.618e-08 4.069e-08
Plot creation:
Thu Sep 8 15:15:18 EDT 2022