batgrbproduct analysis for trigger=1036227
batgrbproduct Analysis for Trigger=1036227
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): Tue Mar 9 07:14:12 EST 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1036227/GCN5_download_cron
======================================================================
Trigger: 01036227 Segment: 000
BAT Trigger Time: 636878303.488 [s; MET]
Trigger Stop: 636878304 [s; MET]
UTC: 2021-03-08T06:37:56.857840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 67.0882570427199 Dec: 37.410718238673 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.39
Image Trigger?: NO
Rate S/N Ratio: 19.3390796058137 [ if not an image trigger ]
Image S/N Ratio: 8.39
Flight Position: [ source = BAT ]
RA: 67.0882570427199 Dec: 37.410718238673 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 67.0830911499629 Dec: 37.4285767295481 [deg; J2000]
{ 04h 28m 19.9s , +37d 25' 42.9" }
+/- 0.88444808691623 [arcmin] (estimated 90% radius based on SNR)
+/- 0.267440103464741 [arcmin] (formal 1-sigma fit error)
SNR: 36.2493932441492
Angular difference between Flight and Ground position is 1.099423 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 5.29599988460541 +/- 0.642112200397981
Measured from: 0.584000110626221
to: 5.87999999523163 [s; relative to TRIGTIME]
T50: 1.5239999294281 +/- 0.145602278348915
Measured from: 1.98400008678436
to: 3.50800001621246 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.12399995326996
to: 3.12399995326996 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0400000810623169
to: 7.36000001430511 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.985176 1.616737 1.653052 0.358997
0.046499 0.054584 0.052127 0.038036 [error]
Peak 0.290662 0.512718 0.636032 0.190308
0.020581 0.026439 0.028581 0.018691 [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 3.87e-07 7.68e-07 1.18e-06 3.99e-06 3.31e-06 6.33e-06 erg/cm2
Error 2.68e-08 3.23e-08 5.05e-08 3.73e-07 1.27e-07 4.04e-07 erg/cm2
Peak flux Power-law 3.55e+00 4.29e+00 3.75e+00 5.61e+00 1.36e+01 1.72e+01 ph/cm2/s
Error 3.44e-01 2.60e-01 2.16e-01 6.60e-01 7.24e-01 9.25e-01 ph/cm2/s
Fluence Cutoff-PL 3.34e-07 8.01e-07 1.26e-06 1.99e-06 3.23e-06 4.39e-06 erg/cm2
Error 3.40e-08 3.65e-08 6.22e-08 5.56e-07 1.34e-07 5.58e-07 erg/cm2
Peak flux Cutoff-PL 2.98e+00 4.46e+00 4.11e+00 3.26e+00 1.33e+01 1.48e+01 ph/cm2/s
Error 4.37e-01 2.90e-01 2.91e-01 9.18e-01 7.36e-01 1.18e+00 ph/cm2/s
Fluence Band 3.31e-07 7.98e-07 1.26e-06 2.02e-06 3.23e-06 4.43e-06 erg/cm2
Error 3.09e-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 1.377 0.062 - - 4.60e-02 1.68e-03 69.630 57
CPL 0.757 0.276 113.6 31.0 8.77e-02 2.49e-02 52.890 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.195 0.084 - - 1.16e-01 5.97e-03 68.770 57
CPL 0.520 0.374 128.3 51.8 2.30e-01 8.80e-02 57.820 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: 4.800000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 7.400 -0.040 7.360
T90 5.296 0.584 5.880
T50 1.524 1.984 3.508
Peak 1.000 2.124 3.124
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
67.0831 +37.4286 0.0053 44.9 -147.1 4.8482 36.2 TRIG_01036227
------------------------------------------
Foreground time interval of the image:
-0.040 7.360 (delta_t = 7.400 [sec])
Background time interval of the image:
-60.488 -0.040 (delta_t = 60.448 [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
Time interval is from -0.040 sec. to 7.360 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37673 ( -0.0621683 0.0621381 )
Norm@50keV : 4.60259E-02 ( -0.00167992 0.00167988 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 69.63 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.22e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 7.4 sec: 5.57622 ( -0.21836 0.218766 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30707e-06 ( -1.27414e-07 1.2756e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 7.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.757297 ( -0.284402 0.267767 )
Epeak [keV] : 113.591 ( -19.1222 42.8626 )
Norm@50keV : 8.76606E-02 ( -0.0207774 0.0290121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.89 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.93e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 7.4 sec: 5.40605 ( -0.22807 0.22918 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.2312e-06 ( -1.33873e-07 1.33518e-07 ) ergs/cm2
Band function
Time interval is from -0.040 sec. to 7.360 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.757357 ( -0.169802 0.306709 )
beta : -10.0000 ( 10 7.10543e-15 )
Epeak [keV] : 113.580 ( -14.8283 42.8559 )
Norm@50keV : 8.76517E-02 ( -0.0208035 0.0290299 )
------------------------------------------------------------
Photon flux (15-150 keV) in 7.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.22935e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.3045 ( )
R^2/D10^2 : 0.334874 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 160.21 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.58e-12 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.653e-07 1.184e-08
25- 50 7.742e-07 4.107e-08
50-150 1.891e-06 1.140e-07
15-150 2.830e-06 1.195e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-7.08354 -200)
Norm : 23.4670 (-0.860047 0.860047)
------------------------------------------------------------
#Fit statistic : Chi-Squared 86.81 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.67e-03 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.325e-07 1.898e-08
25- 50 8.321e-07 3.145e-08
50-150 1.825e-06 6.993e-08
15-150 3.089e-06 1.243e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.78754 (-1.12275 1.32265)
R1^2/D10^2 : 4.83219 (-2.15035 4.50659)
kT2 [keV] : 24.6952 (-2.10802 2.87807)
R2^2/D10^2 : 0.101695 (-0.035117 0.0414478)
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.81e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.363e-07 6.308e-08
25- 50 7.824e-07 8.029e-08
50-150 2.098e-06 1.791e-07
15-150 3.217e-06 2.531e-07
Peak spectrum fit
Power-law model
Time interval is from 2.124 sec. to 3.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19462 ( -0.0835927 0.0835933 )
Norm@50keV : 0.115578 ( -0.00596642 0.0059657 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 68.77 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.37e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.5563 ( -0.723652 0.724286 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17436e-06 ( -6.54874e-08 6.56127e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.124 sec. to 3.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.520376 ( -0.388755 0.358558 )
Epeak [keV] : 128.255 ( -26.9076 76.5935 )
Norm@50keV : 0.230330 ( -0.0690675 0.106996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.82 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.08e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 13.2904 ( -0.7359 0.7371 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.1609e-06 ( 0 0 ) ergs/cm2
Band function
Time interval is from 2.124 sec. to 3.124 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.520356 ( -0.270975 0.468553 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 128.235 ( -20.6794 76.5899 )
Norm@50keV : 0.230333 ( -0.0690826 0.106966 )
------------------------------------------------------------
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] : 20.3611 (-1.22104 1.31079)
R^2/D10^2 : 0.621819 (-0.115452 0.139841)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 104.43 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.30e-04 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.934e-08 4.715e-09
25- 50 2.487e-07 1.660e-08
50-150 7.660e-07 6.250e-08
15-150 1.064e-06 6.870e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 56.3180 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared 115.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.39e-06 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.402e-07 8.300e-09
25- 50 2.698e-07 1.630e-08
50-150 5.916e-07 4.435e-08
15-150 1.002e-06 7.250e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.15142 (-1.52721 2.03486)
R1^2/D10^2 : 13.6371 (-8.41502 28.0011)
kT2 [keV] : 25.4930 (-2.4781 3.55523)
R2^2/D10^2 : 0.263955 (-0.101515 0.118024)
------------------------------------------------------------
#Fit statistic : Chi-Squared 55.54 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.54e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.005e-07 3.524e-08
25- 50 2.437e-07 4.225e-08
50-150 8.193e-07 9.265e-08
15-150 1.163e-06 1.393e-07
Plot creation:
Tue Mar 9 07:16:45 EST 2021