batgrbproduct analysis for trigger=1061223
batgrbproduct Analysis for Trigger=1061223
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): Fri Jul 23 15:10:49 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061223/batgroup_hand_proc
======================================================================
Trigger: 01061223 Segment: 000
BAT Trigger Time: 648680109.44 [s; MET]
Trigger Stop: 648680110.464 [s; MET]
UTC: 2021-07-22T20:54:42.023740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 27.0233922800566 Dec: -6.35436196120301 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.11
Image Trigger?: NO
Rate S/N Ratio: 17.1172427686237 [ if not an image trigger ]
Image S/N Ratio: 9.11
Flight Position: [ source = BAT ]
RA: 27.0233922800566 Dec: -6.35436196120301 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 27.0307024613127 Dec: -6.34720816819843 [deg; J2000]
{ 01h 48m 07.4s , -06d 20' 49.9" }
+/- 1.15498673382668 [arcmin] (estimated 90% radius based on SNR)
+/- 0.441155837178855 [arcmin] (formal 1-sigma fit error)
SNR: 24.7584054902602
Angular difference between Flight and Ground position is 0.611769 arcmin
Partial Coding Fraction: 0.4335938 [ including projection effects ]
Duration
T90: 50.2039999961853 +/- 10.5383053075307
Measured from: -2.19600009918213
to: 48.0079998970032 [s; relative to TRIGTIME]
T50: 15.691999912262 +/- 4.34619642913954
Measured from: 1.07999992370605
to: 16.771999835968 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1
to: 2 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.40400004386902
to: 59.5919998884201 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.983806 1.383867 1.153502 0.293659
0.080542 0.085029 0.076557 0.066799 [error]
Peak 0.058315 0.095743 0.088971 0.028062
0.012788 0.014390 0.013523 0.010439 [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 3.80e-07 6.49e-07 8.45e-07 2.23e-06 2.48e-06 4.10e-06 erg/cm2
Error 5.66e-08 5.41e-08 7.43e-08 4.64e-07 1.80e-07 4.95e-07 erg/cm2
Peak flux Power-law 7.84e-01 7.50e-01 5.00e-01 5.19e-01 2.24e+00 2.55e+00 ph/cm2/s
Error 3.01e-01 1.63e-01 1.07e-01 2.52e-01 4.60e-01 4.56e-01 ph/cm2/s
Fluence Cutoff-PL 3.13e-07 6.60e-07 8.90e-07 1.11e-06 2.37e-06 2.97e-06 erg/cm2
Error 7.84e-08 5.70e-08 8.77e-08 7.87e-07 2.10e-07 8.25e-07 erg/cm2
Peak flux Cutoff-PL 7.12e-01 7.51e-01 5.15e-01 4.05e-01 2.18e+00 2.38e+00 ph/cm2/s
Error 3.78e-01 1.67e-01 1.28e-01 3.95e-01 5.20e-01 6.35e-01 ph/cm2/s
Fluence Band 3.13e-07 6.55e-07 8.87e-07 1.17e-06 2.38e-06 3.03e-06 erg/cm2
Error 7.70e-08 -------- -------- -------- -------- -------- 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 1.619 0.142 - - 4.16e-03 2.92e-04 61.030 53
CPL 0.953 0.684 90.1 277.5 8.05e-03 6.04e-03 57.950 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.585 0.362 - - 1.75e-02 3.10e-03 48.950 53
CPL 1.283 1.497 140.4 0.0 2.35e-02 6.40e-02 48.830 52
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: 24.576000 sec.
T50 in the 50-300 keV band: 10.816000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 63.996 -4.404 59.592
T90 50.204 -2.196 48.008
T50 15.692 1.080 16.772
Peak 1.000 1.000 2.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
27.0307 -6.3472 0.0078 41.5 -0.5 2.8098 24.8 TRIG_01061223
------------------------------------------
Foreground time interval of the image:
-4.404 13.861 (delta_t = 18.265 [sec])
Background time interval of the image:
-239.440 -4.404 (delta_t = 235.036 [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 -4.404 sec. to 59.592 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.61940 ( -0.140424 0.143134 )
Norm@50keV : 4.15870E-03 ( -0.000291886 0.00029186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.03 using 55 PHA bins.
# Reduced chi-squared = 1.152 for 53 degrees of freedom
# Null hypothesis probability = 2.095748e-01
Photon flux (15-150 keV) in 64 sec: 0.537674 ( -0.0438308 0.0446864 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.48346e-06 ( -1.79503e-07 1.80058e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.404 sec. to 59.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.952765 ( -0.724275 0.64373 )
Epeak [keV] : 90.1342 ( -21.2487 533.677 )
Norm@50keV : 8.04592E-03 ( -0.00374044 0.00834317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 55 PHA bins.
# Reduced chi-squared = 1.114 for 52 degrees of freedom
# Null hypothesis probability = 2.651474e-01
Photon flux (15-150 keV) in 64 sec: 0.502659 ( -0.051251 0.054309 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3735e-06 ( -2.11181e-07 2.0969e-07 ) ergs/cm2
Band function
Time interval is from -4.404 sec. to 59.592 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.952698 ( -0.548702 0.788117 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 90.1157 ( -17.9861 527.005 )
Norm@50keV : 8.04592E-03 ( -0.00374029 0.00834848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.95 using 55 PHA bins.
# Reduced chi-squared = 1.136 for 51 degrees of freedom
# Null hypothesis probability = 2.343248e-01
Photon flux (15-150 keV) in 64 sec: 0.504326 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.38227e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.3393 (-1.31705 1.45344)
R^2/D10^2 : 4.20980E-02 (-0.0111031 0.0148538)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.38 using 55 PHA bins.
# Reduced chi-squared = 1.536 for 53 degrees of freedom
# Null hypothesis probability = 7.344230e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.480e-07 2.099e-08
25- 50 6.339e-07 7.184e-08
50-150 1.192e-06 1.530e-07
15-150 1.974e-06 1.677e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.408 (-56.1386 -198.462)
Norm : 2.11613 (-0.139483 0.155623)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.375e-07 2.976e-08
25- 50 6.488e-07 9.651e-08
50-150 1.421e-06 4.903e-07
15-150 2.407e-06 5.936e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.29639 (-1.76923 2.28454)
R1^2/D10^2 : 0.684251 (-0.429977 1.70949)
kT2 [keV] : 22.0366 (-3.51509 6.66244)
R2^2/D10^2 : 1.22316E-02 (-0.00792842 0.0121838)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.167e-07 1.311e-07
25- 50 6.445e-07 1.784e-07
50-150 1.380e-06 3.926e-07
15-150 2.342e-06 5.248e-07
Peak spectrum fit
Power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58526 ( -0.351833 0.372888 )
Norm@50keV : 1.75470E-02 ( -0.00309875 0.0030981 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.95 using 55 PHA bins.
# Reduced chi-squared = 0.9235 for 53 degrees of freedom
# Null hypothesis probability = 6.326678e-01
Photon flux (15-150 keV) in 1 sec: 2.24465 ( -0.449691 0.470189 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.64403e-07 ( -3.00083e-08 3.02531e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28284 ( -1.76657 1.22827 )
Epeak [keV] : 140.392 ( -140.266 -140.266 )
Norm@50keV : 2.35205E-02 ( -0.0235315 0.104438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.83 using 55 PHA bins.
# Reduced chi-squared = 0.9390 for 52 degrees of freedom
# Null hypothesis probability = 5.994228e-01
Photon flux (15-150 keV) in 1 sec: 2.17636 ( -0.51784 0.52207 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.61546e-07 ( -3.4019e-08 3.2499e-08 ) ergs/cm2
Band function
Time interval is from 1.000 sec. to 2.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.27678 ( 1.29566 1.32806 )
beta : -2.07991 ( 9.19356 18.7409 )
Epeak [keV] : 134.321 ( -86.436 -144.812 )
Norm@50keV : 2.35565E-02 ( -0.00859579 0.0232518 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.85 using 55 PHA bins.
# Reduced chi-squared = 0.9578 for 51 degrees of freedom
# Null hypothesis probability = 5.596456e-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] : 15.1701 (-3.23553 3.92788)
R^2/D10^2 : 0.239135 (-0.131468 0.311849)
(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 1.150e-08 3.997e-09
25- 50 4.617e-08 1.174e-08
50-150 7.267e-08 2.562e-08
15-150 1.303e-07 3.495e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-104.032 -199.363)
Norm : 9.06649 (-1.44348 1.6905)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.258e-08 1.291e-08
25- 50 4.343e-08 2.449e-08
50-150 9.525e-08 5.425e-08
15-150 1.612e-07 8.950e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.59734 (-2.4138 3.63697)
R1^2/D10^2 : 5.26064 (-4.31062 58.2474)
kT2 [keV] : 23.4858 (-6.49963 17.9657)
R2^2/D10^2 : 4.32695E-02 (-0.0374285 0.0999129)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.396e-08 1.307e-08
25- 50 4.031e-08 2.107e-08
50-150 9.787e-08 5.850e-08
15-150 1.621e-07 8.405e-08
Plot creation:
Fri Jul 23 15:19:56 EDT 2021