batgrbproduct analysis for trigger=1093742
batgrbproduct Analysis for Trigger=1093742
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 Jan 19 20:00:38 EST 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1093742/GCN5_download_cron
======================================================================
Trigger: 01093742 Segment: 000
BAT Trigger Time: 664222866.56 [s; MET]
Trigger Stop: 664222867.584 [s; MET]
UTC: 2022-01-18T18:20:38.099740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 192.274400418694 Dec: 22.9093590537508 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.36
Image Trigger?: NO
Rate S/N Ratio: 16.4012194668567 [ if not an image trigger ]
Image S/N Ratio: 7.36
Flight Position: [ source = BAT ]
RA: 192.274400418694 Dec: 22.9093590537508 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 192.276730995512 Dec: 22.9105064112356 [deg; J2000]
{ 12h 49m 06.4s , +22d 54' 37.8" }
+/- 1.3567016119643 [arcmin] (estimated 90% radius based on SNR)
+/- 0.668373527232074 [arcmin] (formal 1-sigma fit error)
SNR: 19.6722953332571
Angular difference between Flight and Ground position is 0.146047 arcmin
Partial Coding Fraction: 0.2265625 [ including projection effects ]
Duration
T90: 10.6080000400543 +/- 1.77952803014474
Measured from: -2.31199979782104
to: 8.29600024223328 [s; relative to TRIGTIME]
T50: 4.8639999628067 +/- 0.823222982186274
Measured from: -0.119999766349792
to: 4.74400019645691 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.684000015258789
to: 1.68400001525879 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.89599990844727
to: 9.5440000295639 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.711082 1.096103 0.783147 0.182871
0.061531 0.065725 0.060413 0.047587 [error]
Peak 0.094596 0.126581 0.134230 0.025602
0.017911 0.019123 0.018821 0.013362 [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 2.87e-07 4.77e-07 6.01e-07 1.51e-06 1.79e-06 2.87e-06 erg/cm2
Error 3.29e-08 3.46e-08 5.86e-08 3.05e-07 1.41e-07 3.56e-07 erg/cm2
Peak flux Power-law 1.12e+00 1.09e+00 7.45e-01 7.99e-01 3.28e+00 3.75e+00 ph/cm2/s
Error 2.80e-01 1.75e-01 1.42e-01 3.01e-01 5.07e-01 5.70e-01 ph/cm2/s
Fluence Cutoff-PL 2.64e-07 5.07e-07 6.20e-07 6.98e-07 1.72e-06 2.09e-06 erg/cm2
Error 3.86e-08 4.39e-08 6.48e-08 4.97e-07 1.53e-07 5.12e-07 erg/cm2
Peak flux Cutoff-PL 1.07e+00 1.12e+00 7.71e-01 6.34e-01 3.26e+00 3.59e+00 ph/cm2/s
Error 3.31e-01 2.00e-01 1.71e-01 3.33e-01 5.10e-01 6.85e-01 ph/cm2/s
Fluence Band 2.61e-07 5.06e-07 6.16e-07 9.03e-07 1.72e-06 2.30e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 1.12e+00 1.10e+00 7.45e-01 7.95e-01 3.28e+00 3.75e+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 1.667 0.122 - - 1.43e-02 1.07e-03 44.920 57
CPL 1.117 0.516 78.3 98.5 2.76e-02 1.82e-02 41.130 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.551 0.250 - - 2.59e-02 4.01e-03 46.400 57
CPL 1.311 0.769 156.3 0.0 3.38e-02 0.00e+00 46.190 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: 8.640000 sec.
T50 in the 50-300 keV band: 3.712000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.440 -3.896 9.544
T90 10.608 -2.312 8.296
T50 4.864 -0.120 4.744
Peak 1.000 0.684 1.684
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
192.2767 +22.9105 0.0097 42.8 37.1 2.8212 19.7 TRIG_01093742
------------------------------------------
Foreground time interval of the image:
-3.896 9.544 (delta_t = 13.440 [sec])
Background time interval of the image:
-115.159 -3.896 (delta_t = 111.263 [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 -3.896 sec. to 9.544 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66665 ( -0.1206 0.122584 )
Norm@50keV : 1.43104E-02 ( -0.00106979 0.00106314 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.92 using 59 PHA bins.
# Reduced chi-squared = 0.7881 for 57 degrees of freedom
# Null hypothesis probability = 8.767975e-01
Photon flux (15-150 keV) in 13.44 sec: 1.87897 ( -0.136393 0.136567 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.78588e-06 ( -1.40347e-07 1.4117e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.896 sec. to 9.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.11650 ( -0.545337 0.485948 )
Epeak [keV] : 78.3392 ( -18.7186 178.329 )
Norm@50keV : 2.75646E-02 ( -0.0118862 0.0244576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.13 using 59 PHA bins.
# Reduced chi-squared = 0.7345 for 56 degrees of freedom
# Null hypothesis probability = 9.316327e-01
Photon flux (15-150 keV) in 13.44 sec: 1.83772 ( -0.14124 0.14123 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.72166e-06 ( -1.52692e-07 1.52961e-07 ) ergs/cm2
Band function
Time interval is from -3.896 sec. to 9.544 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.07625 ( -0.516146 6.06244 )
beta : -2.34538 ( 2.3392 0.696948 )
Epeak [keV] : 75.4789 ( -37.7749 76.0185 )
Norm@50keV : 2.90313E-02 ( -0.0128814 0.307997 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.03 using 59 PHA bins.
# Reduced chi-squared = 0.7459 for 55 degrees of freedom
# Null hypothesis probability = 9.193021e-01
Photon flux (15-150 keV) in 13.44 sec: 1.48392 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.71887e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.6738 (-1.17271 1.27839)
R^2/D10^2 : 0.288992 (-0.0801005 0.110896)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.26 using 59 PHA bins.
# Reduced chi-squared = 1.426 for 57 degrees of freedom
# Null hypothesis probability = 1.911551e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.537e-07 2.052e-08
25- 50 5.582e-07 4.482e-08
50-150 6.788e-07 9.811e-08
15-150 1.391e-06 1.298e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 149.551 (-41.681 -145.877)
Norm : 7.70415 (-0.626788 0.780292)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.660e-07 2.722e-08
25- 50 4.928e-07 7.217e-08
50-150 9.716e-07 3.566e-07
15-150 1.730e-06 4.344e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.44804 (-1.41824 1.71324)
R1^2/D10^2 : 2.64333 (-1.41857 3.82116)
kT2 [keV] : 21.9821 (-3.81378 6.7827)
R2^2/D10^2 : 3.96286E-02 (-0.0257326 0.0455841)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.638e-07 8.701e-08
25- 50 5.029e-07 1.286e-07
50-150 9.398e-07 3.349e-07
15-150 1.706e-06 5.081e-07
Peak spectrum fit
Power-law model
Time interval is from 0.684 sec. to 1.684 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.55079 ( -0.244551 0.255536 )
Norm@50keV : 2.58668E-02 ( -0.00402377 0.00398876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.40 using 59 PHA bins.
# Reduced chi-squared = 0.8140 for 57 degrees of freedom
# Null hypothesis probability = 8.410947e-01
Photon flux (15-150 keV) in 1 sec: 3.27534 ( -0.506203 0.506961 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43486e-07 ( -4.04014e-08 4.05866e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.684 sec. to 1.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31099 ( -1.05474 0.483128 )
Epeak [keV] : 156.301 ( -156.299 -156.299 )
Norm@50keV : 3.37923E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8248 for 56 degrees of freedom
# Null hypothesis probability = 8.220680e-01
Photon flux (15-150 keV) in 1 sec: 3.25589 ( -0.50905 0.51181 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.42591e-07 ( -4.1238e-08 4.1031e-08 ) ergs/cm2
Band function
Time interval is from 0.684 sec. to 1.684 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29223 ( 1.29234 1.72886 )
beta : -1.86230 ( 1.83822 2.44629 )
Epeak [keV] : 147.962 ( -147.607 -147.607 )
Norm@50keV : 3.44210E-02 ( -0.0124094 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.19 using 59 PHA bins.
# Reduced chi-squared = 0.8398 for 55 degrees of freedom
# Null hypothesis probability = 7.954302e-01
Photon flux (15-150 keV) in 1 sec: 3.27545 ( ) 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] : 16.2221 (-2.93561 3.5011)
R^2/D10^2 : 0.288949 (-0.142546 0.284762)
(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 1.567e-08 4.939e-09
25- 50 6.673e-08 1.681e-08
50-150 1.234e-07 3.446e-08
15-150 2.058e-07 4.370e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-89.4738 -199.363)
Norm : 13.4462 (-2.02284 2.02408)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.348e-08 1.938e-08
25- 50 6.441e-08 3.618e-08
50-150 1.413e-07 7.870e-08
15-150 2.392e-07 1.323e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.20401 (-2.09528 3.61273)
R1^2/D10^2 : 9.94702 (-8.463 93.2989)
kT2 [keV] : 22.9598 (-5.57545 12.1738)
R2^2/D10^2 : 7.27694E-02 (-0.0579063 0.132074)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.527e-08 1.811e-08
25- 50 5.809e-08 2.741e-08
50-150 1.495e-07 8.655e-08
15-150 2.429e-07 9.575e-08
Plot creation:
Wed Jan 19 20:11:26 EST 2022