batgrbproduct analysis for trigger=1113743
batgrbproduct Analysis for Trigger=1113743
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 Jun 30 13:21:32 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1113743/GCN5_download_cron
======================================================================
Trigger: 01113743 Segment: 000
BAT Trigger Time: 678205648 [s; MET]
Trigger Stop: 678205712 [s; MET]
UTC: 2022-06-29T14:26:58.593700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 103.786471289097 Dec: -1.49292885263794 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 14.86
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.86
Flight Position: [ source = BAT ]
RA: 103.786471289097 Dec: -1.49292885263794 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 103.781796917968 Dec: -1.50829702627768 [deg; J2000]
{ 06h 55m 07.6s , -01d 30' 29.9" }
+/- 2.61212375190842 [arcmin] (estimated 90% radius based on SNR)
+/- 1.48338028771031 [arcmin] (formal 1-sigma fit error)
SNR: 7.71636967128721
Angular difference between Flight and Ground position is 0.963772 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 113.81199991703 +/- 19.3677452945808
Measured from: 5.47200012207031
to: 119.284000039101 [s; relative to TRIGTIME]
T50: 58.2400000095367 +/- 16.1043627242886
Measured from: 36.4120000600815
to: 94.6520000696182 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 78.4759999513626
to: 79.4759999513626 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.55200004577637
to: 131.396000027657 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.138491 1.518691 0.183877 -0.087873
0.092145 0.094942 0.085242 0.084405 [error]
Peak 0.032606 0.011592 0.020630 0.018879
0.007983 0.007985 0.007158 0.006979 [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 7.14e-07 5.70e-07 3.07e-07 2.41e-07 1.70e-06 1.83e-06 erg/cm2
Error 6.15e-08 5.09e-08 5.67e-08 8.01e-08 1.45e-07 1.83e-07 erg/cm2
Peak flux Power-law 2.07e-01 1.85e-01 1.14e-01 1.07e-01 5.51e-01 6.13e-01 ph/cm2/s
Error 1.66e-01 6.43e-02 8.88e-02 1.49e-01 1.88e-01 2.18e-01 ph/cm2/s
Fluence Cutoff-PL 6.70e-07 6.50e-07 4.20e-08 2.40e-11 1.36e-06 1.36e-06 erg/cm2
Error 7.06e-08 6.94e-08 3.30e-08 2.08e-10 1.14e-07 1.14e-07 erg/cm2
Peak flux Cutoff-PL 2.12e-01 1.86e-01 1.11e-01 9.91e-02 5.52e-01 6.08e-01 ph/cm2/s
Error 1.05e-01 6.31e-02 8.88e-02 1.57e-01 1.87e-01 2.18e-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 2.894 0.170 - - 1.12e-03 1.55e-04 107.820 57
CPL -2.117 2.038 23.4 2.0 3.88e+00 1.56e+02 66.930 56
The chi2 of BB fit is 67.31 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.697 0.805 - - 4.16e-03 1.75e-03 53.840 57
CPL 1.701 0.813 10000.0 -0.0 4.16e-03 0.00e+00 53.850 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 132.948 -1.552 131.396
T90 113.812 5.472 119.284
T50 58.240 36.412 94.652
Peak 1.000 78.476 79.476
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
103.7818 -1.5083 0.0248 25.4 -72.3 1.4411 7.7 TRIG_01113743
------------------------------------------
Foreground time interval of the image:
-1.552 11.130 (delta_t = 12.682 [sec])
12.000 93.301 (delta_t = 81.301 [sec])
Background time interval of the image:
-239.000 -56.360 (delta_t = 182.640 [sec])
-55.000 -1.552 (delta_t = 53.448 [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
-1.552000 11.130000
12.000000 131.396000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.89389 ( -0.165801 0.174615 )
Norm@50keV : 1.12199E-03 ( -0.00015269 0.000156393 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 107.82 using 59 PHA bins.
# Reduced chi-squared = 1.8916 for 57 degrees of freedom
# Null hypothesis probability = 5.550205e-05
Photon flux (15-150 keV) in 132.1 sec: 0.285957 ( -0.0206841 0.0206858 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.6994e-06 ( -1.43618e-07 1.47136e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-1.552000 11.130000
12.000000 131.396000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.11709 ( -2.63667 1.43841 )
Epeak [keV] : 23.3687 ( -2.2754 1.75858 )
Norm@50keV : 3.88453 ( -7.70023 303.327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.93 using 59 PHA bins.
# Reduced chi-squared = 1.195 for 56 degrees of freedom
# Null hypothesis probability = 1.503839e-01
Photon flux (15-150 keV) in 132.1 sec: 0.261385 ( -0.021005 0.021047 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.36186e-06 ( -1.11642e-07 1.1605e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-1.552000 11.130000
12.000000 131.396000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.49437 ( -1.57033 -2.49255 )
beta : -5.27746 ( 5.37387 1.3011 )
Epeak [keV] : 23.7045 ( -1.47993 1.42203 )
Norm@50keV : 7.11411 ( -7.32959 207.711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.78 using 59 PHA bins.
# Reduced chi-squared = 1.196 for 55 degrees of freedom
# Null hypothesis probability = 1.514509e-01
Photon flux (15-150 keV) in 132.1 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] : 5.88724 (-0.365402 0.390745)
R^2/D10^2 : 1.15100 (-0.295381 0.40024)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.31 using 59 PHA bins.
# Reduced chi-squared = 1.181 for 57 degrees of freedom
# Null hypothesis probability = 1.649782e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.811e-07 7.166e-08
25- 50 6.515e-07 7.279e-08
50-150 5.516e-08 1.832e-08
15-150 1.388e-06 1.109e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.6040 (-2.53982 3.07187)
Norm : 3.56243 (-0.605237 0.746228)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.175e-07 6.697e-08
25- 50 6.186e-07 6.433e-08
50-150 1.791e-07 6.063e-08
15-150 1.515e-06 1.420e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.78450 (-0.365439 0.390706)
R1^2/D10^2 : 1.22803 (-0.295347 0.400273)
kT2 [keV] : 29.5625 (-28.2824 -28.2824)
R2^2/D10^2 : 1.49424E-04 (-0.000152605 1.47874)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Peak spectrum fit
Power-law model
Time interval is from 78.476 sec. to 79.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69711 ( -0.761244 0.848767 )
Norm@50keV : 4.15670E-03 ( -0.00188395 0.00161846 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.84 using 59 PHA bins.
# Reduced chi-squared = 0.9446 for 57 degrees of freedom
# Null hypothesis probability = 5.942048e-01
Photon flux (15-150 keV) in 1 sec: 0.551499 ( -0.187981 0.187846 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.84893e-08 ( -1.64262e-08 1.74528e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 78.476 sec. to 79.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70086 ( -0.81766 0.808432 )
Epeak [keV] : 1.00000E+04 ( -9999.99 -10000 )
Norm@50keV : 4.15586E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.85 using 59 PHA bins.
# Reduced chi-squared = 0.9616 for 56 degrees of freedom
# Null hypothesis probability = 5.567711e-01
Photon flux (15-150 keV) in 1 sec: 0.551932 ( -0.187516 0.187369 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.78514e-08 ( -1.58259e-08 1.81133e-08 ) ergs/cm2
Band function
Time interval is from 78.476 sec. to 79.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.32603 ( 1.32471 1.32471 )
beta : -1.69621 ( 1.69738 0.761563 )
Epeak [keV] : 24.4395 ( -25.4374 -25.4374 )
Norm@50keV : 9.79645E-03 ( -0.00974462 2443.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.84 using 59 PHA bins.
# Reduced chi-squared = 0.9790 for 55 degrees of freedom
# Null hypothesis probability = 5.188249e-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] : 14.0399 (-9.6403 23.836)
R^2/D10^2 : 6.82104E-02 (-0.0663725 10.7037)
(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 7.217e-09 4.611e-09
25- 50 9.426e-09 6.345e-09
50-150 1.430e-09 1.386e-09
15-150 1.807e-08 1.122e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.849 (-165.21 -198.966)
Norm : 2.18815 (-0.754349 1.71869)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.450e-09 3.540e-09
25- 50 1.048e-08 6.685e-09
50-150 2.297e-08 1.436e-08
15-150 3.890e-08 2.461e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.66123 (-2.04702 2.51807)
R1^2/D10^2 : 4.22889 (-3.85139 70.1183)
kT2 [keV] : 42.4713 (-26.6151 -42.6848)
R2^2/D10^2 : 1.91938E-03 (-0.00176904 0.0113501)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.129e-09 5.085e-09
25- 50 7.181e-09 3.916e-09
50-150 3.059e-08 1.917e-08
15-150 4.590e-08 2.332e-08
Plot creation:
Thu Jun 30 13:28:25 EDT 2022