batgrbproduct analysis for trigger=1053220
batgrbproduct Analysis for Trigger=1053220
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): Thu Jun 3 13:51:48 EDT 2021
Host Name: batproc1
Current Working Dir: /local/data/bat1/prebascript/trigger1053220/batgroup_hand_proc
======================================================================
Trigger: 01053220 Segment: 000
BAT Trigger Time: 644406373.792 [s; MET]
Trigger Stop: 644406373.8 [s; MET]
UTC: 2021-06-03T09:45:46.661040 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 238.818949031945 Dec: -54.0464837942575 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.9
Image Trigger?: NO
Rate S/N Ratio: 29.2232783924049 [ if not an image trigger ]
Image S/N Ratio: 9.9
Flight Position: [ source = BAT ]
RA: 238.818949031945 Dec: -54.0464837942575 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 238.781616415474 Dec: -54.06545780194 [deg; J2000]
{ 15h 55m 07.6s , -54d 03' 55.6" }
+/- 2.19758972362758 [arcmin] (estimated 90% radius based on SNR)
+/- 1.05905853907777 [arcmin] (formal 1-sigma fit error)
SNR: 9.87695817911247
Angular difference between Flight and Ground position is 1.739212 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 0.00799989700317383 +/- 0.0905096828275688
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
T50: 0.00799989700317383 +/- 0.064
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.00799989700317383 second)
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.00799989700317383 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.013467 0.010085 0.002487 0.000022
0.001870 0.001705 0.000886 0.000464 [error]
Peak 0.013467 0.010085 0.002487 0.000022
0.001870 0.001705 0.000886 0.000464 [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 3.01e-09 3.13e-09 2.30e-09 2.71e-09 9.48e-09 1.11e-08 erg/cm2
Error 6.69e-10 6.12e-10 7.47e-10 1.60e-09 1.98e-09 2.84e-09 erg/cm2
Peak flux Power-law 1.24e+01 7.17e+00 2.63e+00 1.27e+00 2.29e+01 2.35e+01 ph/cm2/s
Error 2.80e+00 1.38e+00 8.30e-01 7.05e-01 4.27e+00 4.37e+00 ph/cm2/s
Fluence Cutoff-PL 3.15e-09 4.00e-09 1.45e-09 9.34e-11 8.69e-09 8.70e-09 erg/cm2
Error 7.65e-10 9.90e-10 1.32e-09 8.52e-10 1.81e-09 1.92e-09 erg/cm2
Peak flux Cutoff-PL 1.27e+01 9.22e+00 1.80e+00 6.32e-02 2.38e+01 2.38e+01 ph/cm2/s
Error 3.13e+00 2.31e+00 1.55e+00 4.47e-01 4.40e+00 4.40e+00 ph/cm2/s
Fluence Band 3.55e-09 3.86e-09 1.70e-09 1.02e-09 9.66e-09 1.02e-08 erg/cm2
Error 8.35e-10 8.90e-10 -------- -------- 1.95e-09 -------- 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 2.447 0.309 - - 1.20e-01 3.02e-02 25.370 57
CPL 0.442 2.415 25.4 14.8 2.80e+00 3.22e+02 21.560 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.447 0.309 - - 1.20e-01 3.02e-02 25.370 57
CPL 0.442 2.415 25.4 14.7 2.80e+00 3.22e+02 21.560 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.008 0.000 0.008
T90 0.008 0.000 0.008
T50 0.008 0.000 0.008
Peak 0.008 0.000 0.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
238.7816 -54.0655 0.0195 21.0 160.5 0.0274 9.9 TRIG_01053220
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-239.792 -5.792 (delta_t = 234.000 [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 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.44674 ( -0.296163 0.321524 )
Norm@50keV : 0.120187 ( -0.0304639 0.0299467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 25.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.008 sec: 22.8612 ( -4.26811 4.26813 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.4836e-09 ( -1.96299e-09 1.99337e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.442226 ( -3.20576 1.62478 )
Epeak [keV] : 25.3696 ( -22.6551 6.92358 )
Norm@50keV : 2.79677 ( -2.9504 641.91 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 21.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.008 sec: 23.8084 ( -4.3895 4.4141 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69424e-09 ( -1.7308e-09 1.8868e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98057 ( -4.58872 -4.98057 )
beta : -3.18110 ( -0.995958 0.545255 )
Epeak [keV] : 23.0310 ( -3.58514 3.27419 )
Norm@50keV : 6.17177E+04 ( -10916.2 134376 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.66152e-09 ( -9.66144e-09 -1.91181e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.90762 (-1.05752 1.28316)
R^2/D10^2 : 53.0882 (-28.2628 55.2676)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 23.26 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.210e-09 1.047e-09
25- 50 4.284e-09 1.232e-09
50-150 6.765e-10 3.656e-10
15-150 8.171e-09 2.142e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.5468 (-8.99197 14.6074)
Norm : 187.722 (-57.9936 78.977)
------------------------------------------------------------
#Fit statistic : Chi-Squared 22.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.133e-09 7.024e-10
25- 50 3.679e-09 9.500e-10
50-150 2.150e-09 1.048e-09
15-150 8.962e-09 2.274e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.82062 (-1.42668 1.35104)
R1^2/D10^2 : 95.1280 (-47.5613 88.6903)
kT2 [keV] : 20.4473 (-10.4984 132.656)
R2^2/D10^2 : 0.229813 (-0.222108 1.61504)
------------------------------------------------------------
#Fit statistic : Chi-Squared 18.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.422e-09 1.736e-09
25- 50 3.797e-09 1.946e-09
50-150 2.553e-09 1.663e-09
15-150 9.773e-09 4.138e-09
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.44674 ( -0.296163 0.321524 )
Norm@50keV : 0.120187 ( -0.0304639 0.0299467 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 25.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Photon flux (15-150 keV) in 0.008 sec: 22.8612 ( -4.26811 4.26813 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.4836e-09 ( -1.96299e-09 1.99337e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.442226 ( -3.20576 1.62478 )
Epeak [keV] : 25.3696 ( -22.4916 6.92157 )
Norm@50keV : 2.79677 ( -2.9504 641.91 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 21.56 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 56 degrees of freedom
Photon flux (15-150 keV) in 0.008 sec: 23.8084 ( -4.3895 4.4141 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.69424e-09 ( -1.7308e-09 1.8868e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98057 ( -4.58459 -4.98057 )
beta : -3.18110 ( -0.995958 0.545255 )
Epeak [keV] : 23.0310 ( -3.58514 3.27419 )
Norm@50keV : 6.17177E+04 ( -10916.2 134376 )
------------------------------------------------------------
Photon flux (15-150 keV) in 0.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.66152e-09 ( -9.66144e-09 -1.91181e-09 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 6.90762 (-1.05752 1.28316)
R^2/D10^2 : 53.0882 (-28.2628 55.2676)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 23.26 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.210e-09 1.003e-09
25- 50 4.284e-09 1.352e-09
50-150 6.765e-10 3.745e-10
15-150 8.171e-09 2.152e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.5468 (-8.99197 14.6074)
Norm : 187.722 (-57.9936 78.977)
------------------------------------------------------------
#Fit statistic : Chi-Squared 22.08 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.133e-09 7.144e-10
25- 50 3.679e-09 8.700e-10
50-150 2.150e-09 9.904e-10
15-150 8.962e-09 2.081e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.82062 (-1.42668 1.35104)
R1^2/D10^2 : 95.1280 (-47.5613 88.6886)
kT2 [keV] : 20.4473 (-10.4984 132.656)
R2^2/D10^2 : 0.229813 (-0.222108 1.48391)
------------------------------------------------------------
#Fit statistic : Chi-Squared 18.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.00e+00 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.422e-09 1.807e-09
25- 50 3.797e-09 1.983e-09
50-150 2.553e-09 1.609e-09
15-150 9.773e-09 4.387e-09
Plot creation:
Thu Jun 3 14:06:22 EDT 2021