batgrbproduct analysis for trigger=01061223000
batgrbproduct Analysis for Trigger=01061223000
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 12:17:28 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1061223/GCN5_download_cron
======================================================================
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: 27.0290740577579 Dec: -6.34646627209709 [deg; J2000]
{ 01h 48m 07.0s , -06d 20' 47.3" }
+/- 1.35434683865669 [arcmin] (estimated 90% radius based on SNR)
+/- 0.580052993726683 [arcmin] (formal 1-sigma fit error)
SNR: 19.7211760904422
Angular difference between Flight and Ground position is 0.582431 arcmin
Partial Coding Fraction: 0.4335938 [ including projection effects ]
Duration
T90: 64 +/- 35.7770876399966
Measured from: -15.4399999380112
to: 48.5600000619888 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 0.560000061988831
to: 16.5600000619888 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.05999994277954
to: 9.05999994277954 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.4400000572205
to: 64.5599999427795 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.020179 1.289643 1.124459 0.282006
0.090214 0.094311 0.084802 0.074714 [error]
Peak 0.047450 0.042124 0.027468 0.014088
0.012159 0.012744 0.011485 0.009983 [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 3.58e-07 6.20e-07 8.20e-07 2.21e-06 2.40e-06 4.01e-06 erg/cm2
Error 6.13e-08 5.97e-08 8.19e-08 5.24e-07 1.99e-07 5.57e-07 erg/cm2
Peak flux Power-law 7.29e-01 4.33e-01 1.64e-01 8.23e-02 1.37e+00 1.41e+00 ph/cm2/s
Error 5.10e-01 1.42e-01 1.32e-01 1.20e-01 5.51e-01 5.31e-01 ph/cm2/s
Fluence Cutoff-PL 2.80e-07 6.30e-07 8.75e-07 9.87e-07 2.27e-06 2.77e-06 erg/cm2
Error 8.39e-08 6.33e-08 9.82e-08 7.77e-07 2.31e-07 8.22e-07 erg/cm2
Peak flux Cutoff-PL 7.70e-01 4.33e-01 1.56e-01 7.22e-02 1.39e+00 1.43e+00 ph/cm2/s
Error 5.32e-01 1.42e-01 1.01e-01 1.20e-01 5.71e-01 5.65e-01 ph/cm2/s
Fluence Band 2.79e-07 6.27e-07 8.72e-07 1.01e-06 2.27e-06 2.79e-06 erg/cm2
Error 8.18e-08 5.96e-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 1.596 0.162 - - 3.20e-03 2.58e-04 55.670 53
CPL 0.776 0.808 86.5 135.5 7.14e-03 6.52e-03 52.240 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.403 0.965 - - 7.38e-03 3.28e-03 59.140 53
CPL 2.679 0.501 253.2 0.0 5.60e-03 0.00e+00 59.040 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: 24.448000 sec.
T50 in the 50-300 keV band: 10.816000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.000 -15.440 64.560
T90 64.000 -15.440 48.560
T50 16.000 0.560 16.560
Peak 1.000 8.060 9.060
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
27.0291 -6.3465 0.0098 41.5 -0.5 2.5811 19.7 TRIG_01061223
------------------------------------------
Foreground time interval of the image:
-15.440 12.761 (delta_t = 28.201 [sec])
Background time interval of the image:
-239.440 -225.880 (delta_t = 13.560 [sec])
-224.440 -15.440 (delta_t = 209.000 [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 -15.440 sec. to 64.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59553 ( -0.160121 0.163497 )
Norm@50keV : 3.20070E-03 ( -0.000257875 0.000257874 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.67 using 55 PHA bins.
# Reduced chi-squared = 1.050 for 53 degrees of freedom
# Null hypothesis probability = 3.747727e-01
Photon flux (15-150 keV) in 80 sec: 0.410738 ( -0.038357 0.0392196 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39598e-06 ( -1.98708e-07 1.99383e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.440 sec. to 64.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.775627 ( -0.863855 0.752488 )
Epeak [keV] : 86.5381 ( -19.185 251.802 )
Norm@50keV : 7.14054E-03 ( -0.00367406 0.00937515 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.24 using 55 PHA bins.
# Reduced chi-squared = 1.005 for 52 degrees of freedom
# Null hypothesis probability = 4.647370e-01
Photon flux (15-150 keV) in 80 sec: 0.378374 ( -0.044234 0.047312 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27109e-06 ( -2.318e-07 2.30632e-07 ) ergs/cm2
Band function
Time interval is from -15.440 sec. to 64.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.775532 ( -0.578772 1.12962 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 86.5185 ( -18.0356 250.367 )
Norm@50keV : 7.14109E-03 ( -0.00367704 0.00938207 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.24 using 55 PHA bins.
# Reduced chi-squared = 1.024 for 51 degrees of freedom
# Null hypothesis probability = 4.256938e-01
Photon flux (15-150 keV) in 80 sec: 0.383085 ( 6.61691 -0.049679 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27389e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.7337 (-1.50406 1.68446)
R^2/D10^2 : 2.99578E-02 (-0.00869053 0.0120112)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.13 using 55 PHA bins.
# Reduced chi-squared = 1.267 for 53 degrees of freedom
# Null hypothesis probability = 9.180628e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.373e-07 2.312e-08
25- 50 5.996e-07 7.168e-08
50-150 1.193e-06 1.820e-07
15-150 1.929e-06 1.936e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.105 (-63.1523 -199.113)
Norm : 1.64275 (-0.12293 0.139309)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.273e-07 3.120e-08
25- 50 6.295e-07 1.469e-07
50-150 1.380e-06 5.518e-07
15-150 2.337e-06 6.224e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.14564 (-1.50614 2.23673)
R1^2/D10^2 : 1.12188 (-0.820036 4.06122)
kT2 [keV] : 20.4689 (-2.85662 4.83898)
R2^2/D10^2 : 1.31166E-02 (-0.00746873 0.0103065)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.285e-07 1.471e-07
25- 50 5.959e-07 1.484e-07
50-150 1.331e-06 2.992e-07
15-150 2.255e-06 4.896e-07
Peak spectrum fit
Power-law model
Time interval is from 8.060 sec. to 9.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.40339 ( -0.780324 1.14915 )
Norm@50keV : 7.38474E-03 ( -0.00355698 0.0030007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.14 using 55 PHA bins.
# Reduced chi-squared = 1.116 for 53 degrees of freedom
# Null hypothesis probability = 2.614899e-01
Photon flux (15-150 keV) in 1 sec: 1.36909 ( -0.498897 0.603177 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.2091e-08 ( -2.36105e-08 2.43843e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.060 sec. to 9.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.67938 ( -0.98578 0.0159603 )
Epeak [keV] : 253.243 ( )
Norm@50keV : 5.59751E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.04 using 55 PHA bins.
# Reduced chi-squared = 1.135 for 52 degrees of freedom
# Null hypothesis probability = 2.338672e-01
Photon flux (15-150 keV) in 1 sec: 1.39019 ( -0.558562 0.58341 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.18841e-08 ( -2.7541e-08 2.31438e-08 ) ergs/cm2
Band function
Time interval is from 8.060 sec. to 9.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.24487 ( 8.24487 8.24487 )
beta : -2.40345 ( -1.14928 0.780448 )
Epeak [keV] : 64.4179 ( -64.4179 -64.4179 )
Norm@50keV : 1.00367 ( -0.483442 0.407842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.14 using 55 PHA bins.
# Reduced chi-squared = 1.160 for 51 degrees of freedom
# Null hypothesis probability = 2.027879e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.25299e-08 ( -6.25229e-08 -2.42406e-08 ) ergs/cm2
Single BB
XSPEC: quit
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.32581 (-2.33729 4.23248)
R^2/D10^2 : 1.05013 (-1.05153 2.82629)
(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 1.354e-08 8.395e-09
25- 50 2.536e-08 1.540e-08
50-150 7.582e-09 6.125e-09
15-150 4.648e-08 2.840e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 67.6100 (-38.9017 -67.61)
Norm : 5.53081 (-2.06069 3.79994)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.413e-08 8.915e-09
25- 50 2.227e-08 1.361e-08
50-150 2.787e-08 2.353e-08
15-150 6.428e-08 4.325e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.67706 (-1.75557 3.43487)
R1^2/D10^2 : 2.08731 (-1.6165 8.82664)
kT2 [keV] : 28.1337 (-21.9989 -28.3509)
R2^2/D10^2 : 6.30588E-03 (-0.00619085 0.35072)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.501e-08 8.865e-09
25- 50 2.258e-08 1.333e-08
50-150 3.031e-08 1.780e-08
15-150 6.790e-08 3.540e-08
Plot creation:
Fri Jul 23 13:19:41 EDT 2021