batgrbproduct analysis for trigger=1013852
batgrbproduct Analysis for Trigger=1013852
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 Dec 22 11:49:35 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1013852/GCN5_download_cron
======================================================================
Trigger: 01013852 Segment: 000
BAT Trigger Time: 630227367.616 [s; MET]
Trigger Stop: 630227375.808 [s; MET]
UTC: 2020-12-21T07:09:01.425800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 214.477529644785 Dec: -45.4108092626907 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.86
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 7.86
Flight Position: [ source = BAT ]
RA: 214.477529644785 Dec: -45.4108092626907 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 214.487745338249 Dec: -45.4057936092385 [deg; J2000]
{ 14h 17m 57.1s , -45d 24' 20.9" }
+/- 1.63137893139678 [arcmin] (estimated 90% radius based on SNR)
+/- 0.882678147787471 [arcmin] (formal 1-sigma fit error)
SNR: 15.1171038067584
Angular difference between Flight and Ground position is 0.525106 arcmin
Partial Coding Fraction: 0.4296875 [ including projection effects ]
Duration
T90: 44.539999961853 +/- 6.15418558057988
Measured from: -6.13199996948242
to: 38.4079999923706 [s; relative to TRIGTIME]
T50: 14.1999999284744 +/- 4.85803668825188
Measured from: 4.08000004291534
to: 18.2799999713898 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.15599989891052
to: 5.15599989891052 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.63200008869171
to: 41.7199999094009 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.628203 1.029644 0.891269 0.166006
0.082643 0.081071 0.072699 0.065338 [error]
Peak 0.037211 0.039379 0.037314 0.016568
0.011662 0.011823 0.010810 0.008785 [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 2.32e-07 4.54e-07 6.89e-07 2.27e-06 1.93e-06 3.65e-06 erg/cm2
Error 3.67e-08 4.31e-08 7.13e-08 5.20e-07 1.77e-07 5.65e-07 erg/cm2
Peak flux Power-law 3.22e-01 3.34e-01 2.44e-01 2.87e-01 1.01e+00 1.19e+00 ph/cm2/s
Error 1.63e-01 1.07e-01 8.43e-02 2.04e-01 3.03e-01 3.44e-01 ph/cm2/s
Fluence Cutoff-PL 2.07e-07 4.74e-07 7.20e-07 1.15e-06 1.87e-06 2.55e-06 erg/cm2
Error 4.54e-08 5.00e-08 8.18e-08 -------- 1.92e-07 9.52e-07 erg/cm2
Peak flux Cutoff-PL 2.67e-01 3.59e-01 2.66e-01 1.26e-01 9.74e-01 1.02e+00 ph/cm2/s
Error 2.41e-01 1.31e-01 1.05e-01 2.54e-01 3.30e-01 4.30e-01 ph/cm2/s
Fluence Band 1.96e-07 4.60e-07 7.04e-07 1.34e-06 1.82e-06 2.70e-06 erg/cm2
Error 4.43e-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 1.398 0.149 - - 4.05e-03 3.44e-04 44.960 57
CPL 0.869 0.636 114.4 -38.4 7.22e-03 5.53e-03 42.710 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.451 0.497 - - 8.21e-03 2.38e-03 71.530 57
CPL 0.528 3.465 83.2 -23.4 2.31e-02 2.57e+00 71.120 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: 25.216000 sec.
T50 in the 50-300 keV band: 15.808000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 49.352 -7.632 41.720
T90 44.540 -6.132 38.408
T50 14.200 4.080 18.280
Peak 1.000 4.156 5.156
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
214.4877 -45.4058 0.0127 40.4 -33.9 2.7501 15.1 TRIG_01013852
------------------------------------------
Foreground time interval of the image:
-7.632 41.720 (delta_t = 49.352 [sec])
Background time interval of the image:
-239.616 -213.656 (delta_t = 25.960 [sec])
-212.616 -7.632 (delta_t = 204.984 [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 -7.632 sec. to 41.720 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39761 ( -0.148978 0.148386 )
Norm@50keV : 4.05216E-03 ( -0.000343674 0.000343506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 44.96 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.76e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 49.35 sec: 0.493210 ( -0.0440346 0.0441935 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93325e-06 ( -1.76625e-07 1.77504e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.632 sec. to 41.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.868735 ( -0.692914 0.579869 )
Epeak [keV] : 114.362 ( -37.6527 -114.362 )
Norm@50keV : 7.22034E-03 ( -0.00329553 0.00775507 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 42.71 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.04e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 49.35 sec: 0.479792 ( -0.046608 0.046672 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.87228e-06 ( -1.92564e-07 1.91971e-07 ) ergs/cm2
Band function
Time interval is from -7.632 sec. to 41.720 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.896834 ( -0.285504 0.381257 )
beta : -9.37094 ( 9.37163 19.3716 )
Epeak [keV] : 117.876 ( -117.766 -117.766 )
Norm@50keV : 7.00036E-03 ( -0.00209988 0.00185999 )
------------------------------------------------------------
Photon flux (15-150 keV) in 49.35 sec: 0.483515 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81808e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.1077 (-1.72549 1.96838)
R^2/D10^2 : 3.63167E-02 (-0.01145 0.0162924)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 63.93 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.46e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.066e-07 1.922e-08
25- 50 4.742e-07 6.420e-08
50-150 9.929e-07 1.537e-07
15-150 1.574e-06 1.782e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-35.0774 -200)
Norm : 2.05604 (-0.174489 0.174489)
------------------------------------------------------------
#Fit statistic : Chi-Squared 46.73 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.32e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.527e-07 3.092e-08
25- 50 4.862e-07 1.585e-07
50-150 1.066e-06 5.453e-07
15-150 1.805e-06 4.676e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.91927 (-2.49452 3.38329)
R1^2/D10^2 : 0.423167 (-0.29376 1.7962)
kT2 [keV] : 24.4632 (-4.89702 12.3535)
R2^2/D10^2 : 8.83375E-03 (-0.00685257 0.0118458)
------------------------------------------------------------
#Fit statistic : Chi-Squared 43.20 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.76e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.045e-07 1.002e-07
25- 50 4.696e-07 1.825e-07
50-150 1.178e-06 5.584e-07
15-150 1.852e-06 7.210e-07
Peak spectrum fit
Power-law model
Time interval is from 4.156 sec. to 5.156 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45081 ( -0.493504 0.499969 )
Norm@50keV : 8.20505E-03 ( -0.00238097 0.00237265 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.53 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.32e-02 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.01136 ( -0.301718 0.303924 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.85036e-08 ( -2.42725e-08 2.46314e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.156 sec. to 5.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.528493 ( -5.1719 1.75805 )
Epeak [keV] : 83.1944 ( -36.3891 -83.1224 )
Norm@50keV : 2.30818E-02 ( -0.0231417 5.10816 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.12 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.40e-02 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 0.974162 ( -0.339712 0.320088 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.47168e-08 ( -2.7146e-08 2.66842e-08 ) ergs/cm2
Band function
Time interval is from 4.156 sec. to 5.156 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.173495 ( 0.65243 0.65243 )
beta : -2.09436 ( 1.94401 0.931758 )
Epeak [keV] : 70.6596 ( -70.7223 115.762 )
Norm@50keV : 3.56567E-02 ( -0.0225082 800.402 )
------------------------------------------------------------
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] : 15.8502 (-4.16505 6.30209)
R^2/D10^2 : 9.98442E-02 (-0.0998419 0.190367)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.91 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 8.82e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.197e-09 3.343e-09
25- 50 2.169e-08 1.222e-08
50-150 3.795e-08 2.398e-08
15-150 6.484e-08 3.993e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.359 (-125.526 -199.362)
Norm : 4.20261 (-1.2066 1.20896)
------------------------------------------------------------
#Fit statistic : Chi-Squared 71.46 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 9.42e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.046e-08 6.365e-09
25- 50 2.013e-08 1.223e-08
50-150 4.415e-08 2.707e-08
15-150 7.475e-08 4.530e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.35245 (-3.31656 -3.31656)
R1^2/D10^2 : 14.2604 (-19.0111 1.3986e+06)
kT2 [keV] : 17.6578 (-5.10854 -17.5648)
R2^2/D10^2 : 6.43584E-02 (-0.0664493 0.160779)
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.64 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 7.61e-02 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.189e-09 5.060e-09
25- 50 1.951e-08 1.148e-08
50-150 4.149e-08 2.653e-08
15-150 7.019e-08 3.764e-08
Plot creation:
Tue Dec 22 11:53:05 EST 2020