batgrbproduct analysis for trigger=1191188
batgrbproduct Analysis for Trigger=1191188
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 Sep 12 07:22:09 EDT 2023
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1191188/GCN5_download_cron
======================================================================
Trigger: 01191188 Segment: 000
BAT Trigger Time: 716114877.504 [s; MET]
Trigger Stop: 716114883.008 [s; MET]
UTC: 2023-09-11T08:47:25.515160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 226.782406715387 Dec: -41.333950377554 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.76
Image Trigger?: NO
Rate S/N Ratio: 12.0830459735946 [ if not an image trigger ]
Image S/N Ratio: 6.76
Flight Position: [ source = BAT ]
RA: 226.782406715387 Dec: -41.333950377554 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 226.795732402342 Dec: -41.3558447713054 [deg; J2000]
{ 15h 07m 11.0s , -41d 21' 21.0" }
+/- 2.04414928719245 [arcmin] (estimated 90% radius based on SNR)
+/- 1.00332382978128 [arcmin] (formal 1-sigma fit error)
SNR: 10.9528953309954
Angular difference between Flight and Ground position is 1.444305 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 16.2079999446869 +/- 2.89211680744319
Measured from: -7.37199985980988
to: 8.83600008487701 [s; relative to TRIGTIME]
T50: 7.66400003433228 +/- 3.1472000376258
Measured from: -2.64799988269806
to: 5.01600015163422 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.07200002670288
to: 3.07200002670288 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.63199996948242
to: 9.58400011062622 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.175716 0.193503 0.196550 0.060022
0.032977 0.031332 0.026009 0.022406 [error]
Peak 0.034906 0.027410 0.020423 0.010413
0.008132 0.007622 0.006348 0.005364 [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 3.90e-08 8.32e-08 1.39e-07 5.31e-07 3.83e-07 7.92e-07 erg/cm2
Error 1.15e-08 1.43e-08 2.51e-08 2.24e-07 6.28e-08 2.38e-07 erg/cm2
Peak flux Power-law 2.80e-01 2.20e-01 1.17e-01 8.96e-02 6.57e-01 7.06e-01 ph/cm2/s
Error 1.12e-01 5.83e-02 5.29e-02 8.19e-02 1.74e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 3.90e-08 8.32e-08 1.39e-07 5.27e-07 3.83e-07 7.89e-07 erg/cm2
Error 1.00e-08 1.46e-08 2.56e-08 3.28e-07 4.72e-08 2.43e-07 erg/cm2
Peak flux Cutoff-PL 2.83e-01 2.20e-01 1.15e-01 8.59e-02 6.57e-01 7.05e-01 ph/cm2/s
Error 1.12e-01 6.45e-02 5.23e-02 9.64e-02 1.74e-01 1.90e-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 1.257 0.278 - - 2.10e-03 3.11e-04 56.640 57
CPL 1.253 1.389 10000.0 0.0 2.11e-03 -9.00e-04 56.650 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.917 0.556 - - 4.55e-03 1.55e-03 57.950 57
CPL 2.080 1.089 35.5 0.0 3.73e-03 0.00e+00 57.920 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: 9.088000 sec.
T50 in the 50-300 keV band: 3.328000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 18.216 -8.632 9.584
T90 16.208 -7.372 8.836
T50 7.664 -2.648 5.016
Peak 1.000 2.072 3.072
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
226.7957 -41.3558 0.0175 12.8 -53.3 0.7055 11.0 TRIG_01191188
------------------------------------------
Foreground time interval of the image:
-8.632 9.584 (delta_t = 18.216 [sec])
Background time interval of the image:
-60.504 -8.632 (delta_t = 51.872 [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 -8.632 sec. to 9.584 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25717 ( -0.282011 0.273703 )
Norm@50keV : 2.10360E-03 ( -0.00031132 0.000311318 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.64 using 59 PHA bins.
# Reduced chi-squared = 0.9937 for 57 degrees of freedom
# Null hypothesis probability = 4.884673e-01
Photon flux (15-150 keV) in 18.22 sec: 0.249093 ( -0.038514 0.0387272 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82861e-07 ( -6.24565e-08 6.31697e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -8.632 sec. to 9.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.25323 ( -0.842692 1.93606 )
Epeak [keV] : 1.00000E+04 ( -10000 -10000 )
Norm@50keV : 2.11288E-03 ( -0.000312713 -0.00211293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.65 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.507230e-01
Photon flux (15-150 keV) in 18.22 sec: 0.249217 ( -0.038904 0.038446 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.82946e-07 ( -3.20654e-08 6.23798e-08 ) ergs/cm2
Band function
Time interval is from -8.632 sec. to 9.584 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.92606 ( -4.92606 -4.92606 )
beta : -1.30545 ( -0.335415 0.303048 )
Epeak [keV] : 23.9707 ( -23.9707 9.62368 )
Norm@50keV : 204.295 ( -30.2074 826567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.42 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 55 degrees of freedom
# Null hypothesis probability = 4.214974e-01
Photon flux (15-150 keV) in 18.22 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] : 19.9427 (-4.12891 5.4584)
R^2/D10^2 : 1.10003E-02 (-0.00592756 0.0127617)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.03 using 59 PHA bins.
# Reduced chi-squared = 1.229 for 57 degrees of freedom
# Null hypothesis probability = 1.152378e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.538e-08 5.499e-09
25- 50 7.648e-08 2.189e-08
50-150 2.254e-07 6.463e-08
15-150 3.173e-07 7.962e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-56.4316 -200)
Norm : 1.03742 (-0.156006 0.156006)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.707e-08 2.683e-08
25- 50 9.055e-08 5.084e-08
50-150 1.986e-07 1.120e-07
15-150 3.362e-07 1.892e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.67069 (-2.23543 3.09455)
R1^2/D10^2 : 0.294007 (-0.214765 0.757593)
kT2 [keV] : 32.6493 (-9.78763 31.6663)
R2^2/D10^2 : 1.97336E-03 (-0.00164987 0.00426239)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.201e-08 2.415e-08
25- 50 8.147e-08 4.324e-08
50-150 2.690e-07 1.481e-07
15-150 3.925e-07 2.073e-07
Peak spectrum fit
Power-law model
Time interval is from 2.072 sec. to 3.072 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91727 ( -0.512199 0.600569 )
Norm@50keV : 4.54590E-03 ( -0.00162332 0.0014845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 57 degrees of freedom
# Null hypothesis probability = 4.400083e-01
Photon flux (15-150 keV) in 1 sec: 0.657219 ( -0.174279 0.174375 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.18021e-08 ( -1.35191e-08 1.41948e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.072 sec. to 3.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08025 ( -2.14368 0.0347536 )
Epeak [keV] : 35.5312 ( )
Norm@50keV : 3.73284E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.92 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.043476e-01
Photon flux (15-150 keV) in 1 sec: 0.657464 ( -0.174224 0.173975 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.16728e-08 ( -1.37732e-08 1.41561e-08 ) ergs/cm2
Band function
Time interval is from 2.072 sec. to 3.072 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -5.24159 ( 8.76958 5.24159 )
beta : -1.91729 ( -0.60059 0.512228 )
Epeak [keV] : 64.1192 ( -64.1192 -64.1192 )
Norm@50keV : 0.617848 ( -0.220628 0.201768 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 59 PHA bins.
# Reduced chi-squared = 1.054 for 55 degrees of freedom
# Null hypothesis probability = 3.670066e-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] : 12.2649 (-4.17843 5.57678)
R^2/D10^2 : 0.139459 (-0.137866 0.504827)
(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 4.444e-09 2.753e-09
25- 50 1.435e-08 8.710e-09
50-150 1.316e-08 8.874e-09
15-150 3.195e-08 1.975e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 87.5569 (-51.8991 -87.5569)
Norm : 2.97397 (-0.970971 1.72537)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.752e-09 4.722e-09
25- 50 1.303e-08 7.884e-09
50-150 1.951e-08 1.559e-08
15-150 4.029e-08 2.653e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.86936 (-1.97819 3.37293)
R1^2/D10^2 : 45.9701 (-44.9099 131321)
kT2 [keV] : 16.6155 (-5.71463 13.2018)
R2^2/D10^2 : 4.06861E-02 (-0.0351544 0.0588735)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.784e-09 4.932e-09
25- 50 1.080e-08 6.360e-09
50-150 1.956e-08 1.273e-08
15-150 3.914e-08 2.129e-08
Plot creation:
Tue Sep 12 07:24:03 EDT 2023