batgrbproduct analysis for trigger=1036024
batgrbproduct Analysis for Trigger=1036024
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): Sun Mar 7 05:39:59 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1036024/GCN5_download_cron
======================================================================
Trigger: 01036024 Segment: 000
BAT Trigger Time: 636715960.896 [s; MET]
Trigger Stop: 636715962.944 [s; MET]
UTC: 2021-03-06T09:32:14.276600 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 331.84758020164 Dec: 10.1749633736152 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.4
Image Trigger?: NO
Rate S/N Ratio: 10.0498756211209 [ if not an image trigger ]
Image S/N Ratio: 8.4
Flight Position: [ source = BAT ]
RA: 331.84758020164 Dec: 10.1749633736152 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 331.81309277612 Dec: 10.1518933543646 [deg; J2000]
{ 22h 07m 15.1s , +10d 09' 06.8" }
+/- 1.90074751330162 [arcmin] (estimated 90% radius based on SNR)
+/- 0.953510582875102 [arcmin] (formal 1-sigma fit error)
SNR: 12.152199962339
Angular difference between Flight and Ground position is 2.462614 arcmin
Partial Coding Fraction: 0.2148438 [ including projection effects ]
Duration
T90: 24.3200000524521 +/- 2.44590759811478
Measured from: -1.67199993133545
to: 22.6480001211166 [s; relative to TRIGTIME]
T50: 15.5040000677109 +/- 3.69430261002183
Measured from: 1.14400005340576
to: 16.6480001211166 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.03600001335144
to: 2.03600001335144 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.42400002479553
to: 24.6319999694824 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.593143 0.941082 0.634876 0.264173
0.088295 0.093771 0.089753 0.098463 [error]
Peak 0.020354 0.128792 0.114091 0.049372
0.018317 0.020103 0.019681 0.019744 [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 1.97e-07 3.88e-07 5.95e-07 1.99e-06 1.67e-06 3.18e-06 erg/cm2
Error 3.93e-08 4.66e-08 8.92e-08 6.58e-07 2.18e-07 7.23e-07 erg/cm2
Peak flux Power-law 4.21e-01 6.69e-01 8.01e-01 1.87e+00 2.43e+00 3.76e+00 ph/cm2/s
Error 1.86e-01 1.83e-01 1.45e-01 7.61e-01 4.73e-01 7.80e-01 ph/cm2/s
Fluence Cutoff-PL 1.95e-07 3.91e-07 5.97e-07 1.83e-06 1.66e-06 2.99e-06 erg/cm2
Error 4.27e-08 5.02e-08 9.20e-08 -------- 2.42e-07 1.13e-06 erg/cm2
Peak flux Cutoff-PL 4.01e-01 6.84e-01 8.25e-01 1.41e+00 2.42e+00 3.30e+00 ph/cm2/s
Error 1.64e-01 2.05e-01 1.79e-01 1.45e+00 4.74e-01 9.99e-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 1.383 0.204 - - 6.35e-03 7.32e-04 56.240 57
CPL 1.353 1.129 1141.1 0.0 6.57e-03 9.88e-03 56.240 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.739 0.339 - - 2.11e-02 4.32e-03 59.060 57
CPL 0.504 1.041 349.8 0.0 2.73e-02 6.52e-02 58.950 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: 2.304000 sec.
T50 in the 50-300 keV band: 1.408000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 27.056 -2.424 24.632
T90 24.320 -1.672 22.648
T50 15.504 1.144 16.648
Peak 1.000 1.036 2.036
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
331.8131 +10.1519 0.0159 37.8 -72.6 2.5577 12.2 TRIG_01036024
------------------------------------------
Foreground time interval of the image:
-2.424 24.632 (delta_t = 27.056 [sec])
Background time interval of the image:
-93.995 -2.424 (delta_t = 91.571 [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 -2.424 sec. to 24.632 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.38338 ( -0.203856 0.203346 )
Norm@50keV : 6.35329E-03 ( -0.000733659 0.000729991 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.04e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 27.06 sec: 0.770844 ( -0.0882393 0.0883853 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66695e-06 ( -2.16302e-07 2.19468e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.424 sec. to 24.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35333 ( -0.927499 1.32954 )
Epeak [keV] : 1141.08 ( -1119.66 -1119.66 )
Norm@50keV : 6.56691E-03 ( -0.00657295 0.013191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 56.24 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.66e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 27.06 sec: 0.769205 ( -0.092169 0.089714 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.65926e-06 ( -2.58023e-07 2.25745e-07 ) ergs/cm2
Band function
Time interval is from -2.424 sec. to 24.632 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96370 ( -4.9637 -4.9637 )
beta : -1.44568 ( -0.259417 0.223581 )
Epeak [keV] : 23.8320 ( -23.832 6.84316 )
Norm@50keV : 768.366 ( -86.4006 2.65877e+06 )
------------------------------------------------------------
Photon flux (15-150 keV) in 27.06 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] : 14.5361 (-1.95698 2.40321)
R^2/D10^2 : 9.81314E-02 (-0.0406409 0.0648924)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.41e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.180e-07 2.318e-08
25- 50 4.553e-07 7.942e-08
50-150 6.454e-07 1.545e-07
15-150 1.219e-06 2.001e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-56.2572 -200)
Norm : 3.16509 (-0.358105 0.358105)
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.01 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.38e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.133e-07 1.178e-07
25- 50 4.103e-07 2.255e-07
50-150 8.998e-07 4.895e-07
15-150 1.523e-06 8.349e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.7353 (-2.12417 2.22097)
R1^2/D10^2 : 0.237767 (-0.130296 0.188089)
kT2 [keV] : 200.000 (-165.199 -200)
R2^2/D10^2 : 1.10615E-04 (-3.29818e-05 0.000436368)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.53e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.611e-07 6.325e-08
25- 50 4.497e-07 1.645e-07
50-150 1.038e-06 7.032e-07
15-150 1.649e-06 8.436e-07
Peak spectrum fit
Power-law model
Time interval is from 1.036 sec. to 2.036 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.739350 ( -0.362454 0.314791 )
Norm@50keV : 2.10826E-02 ( -0.00440402 0.00423359 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 59.06 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.00e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 2.43020 ( -0.471024 0.475781 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.52875e-07 ( -4.71597e-08 4.74006e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.036 sec. to 2.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.504110 ( -1.55436 0.527489 )
Epeak [keV] : 349.798 ( -352.2 -352.2 )
Norm@50keV : 2.72838E-02 ( -0.0100561 0.120388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 58.95 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.68e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 2.41998 ( -0.47109 0.4766 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49563e-07 ( -5.4042e-08 4.926e-08 ) ergs/cm2
Band function
Time interval is from 1.036 sec. to 2.036 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96668 ( -13.7423 -4.96668 )
beta : -1.24020 ( -0.661381 0.508816 )
Epeak [keV] : 44.3234 ( -14.0911 11.3801 )
Norm@50keV : 56.4767 ( -9.84907 407.661 )
------------------------------------------------------------
Photon flux (15-150 keV) in 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] : 22.5905 (-5.55824 10.3164)
R^2/D10^2 : 8.40039E-02 (-0.0566138 0.124861)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.13 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.69e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.836e-09 3.006e-09
25- 50 4.208e-08 1.633e-08
50-150 1.605e-07 5.914e-08
15-150 2.104e-07 7.323e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-40.8844 -200)
Norm : 9.89771 (-2.00448 2.00448)
------------------------------------------------------------
#Fit statistic : Chi-Squared 76.39 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.42e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.464e-08 1.470e-08
25- 50 4.740e-08 2.725e-08
50-150 1.040e-07 5.955e-08
15-150 1.760e-07 1.040e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 12.9950 (-2.88597 3.79785)
R1^2/D10^2 : 0.356362 (-0.215295 0.311148)
kT2 [keV] : 199.363 (-148.709 -199.363)
R2^2/D10^2 : 5.31883E-04 (-0.000232361 0.00611726)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.69e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.344e-08 8.140e-09
25- 50 4.972e-08 2.831e-08
50-150 1.877e-07 5.520e-08
15-150 2.509e-07 1.002e-07
Plot creation:
Sun Mar 7 05:42:56 EST 2021