batgrbproduct analysis for trigger=1062150
batgrbproduct Analysis for Trigger=1062150
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 30 11:14:21 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1062150/batgroup_hand_proc
======================================================================
Trigger: 01062150 Segment: 000
BAT Trigger Time: 649313876.672 [s; MET]
Trigger Stop: 649313877.696 [s; MET]
UTC: 2021-07-30T04:57:29.213460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 149.592469795951 Dec: 69.7052044190183 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 18.82
Image Trigger?: NO
Rate S/N Ratio: 68.6221538571911 [ if not an image trigger ]
Image S/N Ratio: 18.82
Flight Position: [ source = BAT ]
RA: 149.592469795951 Dec: 69.7052044190183 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 149.569858961821 Dec: 69.7034524130317 [deg; J2000]
{ 09h 58m 16.8s , +69d 42' 12.4" }
+/- 1.01438945493361 [arcmin] (estimated 90% radius based on SNR)
+/- 0.382132399199096 [arcmin] (formal 1-sigma fit error)
SNR: 29.8026227836214
Angular difference between Flight and Ground position is 0.482172 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 3.85999989509583 +/- 0.657814625556765
Measured from: 0.0279999971389771
to: 3.8879998922348 [s; relative to TRIGTIME]
T50: 1.67999994754791 +/- 0.268745212913287
Measured from: 0.503999948501587
to: 2.1839998960495 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.171999931335449
to: 1.17199993133545 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.320000052452087
to: 5.01199996471405 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.449499 0.676567 0.585666 0.160058
0.027093 0.030677 0.028361 0.023416 [error]
Peak 0.156166 0.302528 0.288930 0.087175
0.013415 0.016960 0.016916 0.012284 [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 1.54e-07 2.99e-07 4.52e-07 1.48e-06 1.27e-06 2.38e-06 erg/cm2
Error 1.78e-08 1.93e-08 2.85e-08 2.28e-07 6.99e-08 2.38e-07 erg/cm2
Peak flux Power-law 1.77e+00 2.20e+00 2.00e+00 3.16e+00 7.06e+00 9.13e+00 ph/cm2/s
Error 2.58e-01 1.89e-01 1.35e-01 4.95e-01 4.88e-01 5.87e-01 ph/cm2/s
Fluence Cutoff-PL 1.39e-07 3.02e-07 4.65e-07 9.87e-07 1.24e-06 1.89e-06 erg/cm2
Error 2.58e-08 2.00e-08 3.39e-08 6.17e-07 8.14e-08 4.74e-07 erg/cm2
Peak flux Cutoff-PL 1.58e+00 2.20e+00 2.07e+00 2.39e+00 6.88e+00 8.25e+00 ph/cm2/s
Error 3.53e-01 1.94e-01 1.78e-01 9.48e-01 5.50e-01 1.14e+00 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 1.406 0.107 - - 2.47e-02 1.29e-03 54.760 53
CPL 1.060 0.452 158.9 -48.2 3.46e-02 1.64e-02 53.240 52
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.139 0.123 - - 6.06e-02 3.90e-03 44.030 53
CPL 0.808 0.478 223.2 0.0 8.23e-02 4.03e-02 42.900 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: 2.816000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 5.332 -0.320 5.012
T90 3.860 0.028 3.888
T50 1.680 0.504 2.184
Peak 1.000 0.172 1.172
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
149.5699 +69.7035 0.0065 30.1 -55.4 1.8762 29.8 TRIG_01062150
------------------------------------------
Foreground time interval of the image:
-0.320 5.012 (delta_t = 5.332 [sec])
Background time interval of the image:
-239.672 -0.320 (delta_t = 239.352 [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 -0.320 sec. to 5.012 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40618 ( -0.10629 0.107187 )
Norm@50keV : 2.46740E-02 ( -0.00128921 0.00128857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.76 using 55 PHA bins.
# Reduced chi-squared = 1.033 for 53 degrees of freedom
# Null hypothesis probability = 4.077267e-01
Photon flux (15-150 keV) in 5.332 sec: 3.00924 ( -0.177473 0.179184 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.26965e-06 ( -6.97335e-08 6.99782e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.320 sec. to 5.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.06015 ( -0.513859 0.389242 )
Epeak [keV] : 158.928 ( -62.512 -158.928 )
Norm@50keV : 3.45559E-02 ( -0.0106038 0.022164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.24 using 55 PHA bins.
# Reduced chi-squared = 1.024 for 52 degrees of freedom
# Null hypothesis probability = 4.261272e-01
Photon flux (15-150 keV) in 5.332 sec: 2.91226 ( -0.21234 0.21956 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.24071e-06 ( -8.21075e-08 8.07798e-08 ) ergs/cm2
Band function
Time interval is from -0.320 sec. to 5.012 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.805517 ( 0.80058 5.52184 )
beta : -1.59355 ( 1.59492 0.243249 )
Epeak [keV] : 102.855 ( -102.119 666.806 )
Norm@50keV : 4.66457E-02 ( -0.0231009 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.81 using 55 PHA bins.
# Reduced chi-squared = 1.036 for 51 degrees of freedom
# Null hypothesis probability = 4.038792e-01
Photon flux (15-150 keV) in 5.332 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] : 17.8631 (-1.16611 1.27507)
R^2/D10^2 : 0.184059 (-0.0387004 0.0481793)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 99.49 using 55 PHA bins.
# Reduced chi-squared = 1.877 for 53 degrees of freedom
# Null hypothesis probability = 1.156305e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.285e-08 6.718e-09
25- 50 2.890e-07 2.170e-08
50-150 6.681e-07 5.759e-08
15-150 1.020e-06 6.185e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-12.9828 -200)
Norm : 12.1596 (-0.604092 0.604092)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.614e-07 9.038e-09
25- 50 3.105e-07 1.773e-08
50-150 6.811e-07 3.786e-08
15-150 1.153e-06 1.248e-07
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.07063 (-1.85639 2.11654)
R1^2/D10^2 : 1.63883 (-0.774753 2.06403)
kT2 [keV] : 28.8465 (-5.58897 11.9939)
R2^2/D10^2 : 2.90831E-02 (-0.0197676 0.0319359)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.243e-07 2.765e-08
25- 50 3.095e-07 5.815e-08
50-150 7.977e-07 2.366e-07
15-150 1.231e-06 2.501e-07
Peak spectrum fit
Power-law model
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.13919 ( -0.122658 0.122636 )
Norm@50keV : 6.05874E-02 ( -0.00390448 0.00389009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.03 using 55 PHA bins.
# Reduced chi-squared = 0.8307 for 53 degrees of freedom
# Null hypothesis probability = 8.052162e-01
Photon flux (15-150 keV) in 1 sec: 7.05666 ( -0.485265 0.48976 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.25754e-07 ( -4.11796e-08 4.1311e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.808230 ( -0.572541 0.383272 )
Epeak [keV] : 223.175 ( -223.176 -223.176 )
Norm@50keV : 8.22868E-02 ( -0.0243074 0.0562503 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.90 using 55 PHA bins.
# Reduced chi-squared = 0.8251 for 52 degrees of freedom
# Null hypothesis probability = 8.115397e-01
Photon flux (15-150 keV) in 1 sec: 6.88056 ( -0.54159 0.55801 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.1661e-07 ( -4.4865e-08 4.4205e-08 ) ergs/cm2
Band function
Time interval is from 0.172 sec. to 1.172 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.931973 ( -0.17063 -0.17063 )
beta : -1.27417 ( 1.26623 0.188554 )
Epeak [keV] : 57.8651 ( -57.7682 100.022 )
Norm@50keV : 0.795280 ( -0.811921 149.807 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.40 using 55 PHA bins.
# Reduced chi-squared = 0.8117 for 51 degrees of freedom
# Null hypothesis probability = 8.291527e-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] : 20.2348 (-1.56333 1.74359)
R^2/D10^2 : 0.319064 (-0.074474 0.0945152)
(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 2.507e-08 2.780e-09
25- 50 1.258e-07 1.015e-08
50-150 3.825e-07 3.685e-08
15-150 5.334e-07 3.895e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
XSPEC: quit
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-8.58085 -200)
Norm : 27.3800 (-1.70038 1.70038)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.815e-08 4.765e-09
25- 50 1.311e-07 9.550e-09
50-150 2.875e-07 7.015e-08
15-150 4.868e-07 8.235e-08
Double BB
XSPEC12>exit
XSPEC: quit
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.1145 (-2.29166 2.65868)
R1^2/D10^2 : 1.69133 (-0.744454 1.67292)
kT2 [keV] : 38.2260 (-9.20864 27.6388)
R2^2/D10^2 : 3.32865E-02 (-0.0260106 0.0503943)
------------------------------------------------------------
Reduced chi-squared =
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.185e-08 9.705e-09
25- 50 1.330e-07 3.102e-08
50-150 4.419e-07 1.874e-07
15-150 6.167e-07 2.087e-07
Plot creation:
Fri Jul 30 11:19:46 EDT 2021