batgrbproduct analysis for trigger=1014316
batgrbproduct Analysis for Trigger=1014316
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): Wed Dec 23 18:49:20 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger1014316/GCN5_download_cron
======================================================================
Trigger: 01014316 Segment: 000
BAT Trigger Time: 630439133.184 [s; MET]
Trigger Stop: 630439134.208 [s; MET]
UTC: 2020-12-23T17:58:26.979800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 132.848608736818 Dec: 71.1738904183058 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.13
Image Trigger?: NO
Rate S/N Ratio: 15.1986841535707 [ if not an image trigger ]
Image S/N Ratio: 8.13
Flight Position: [ source = BAT ]
RA: 132.848608736818 Dec: 71.1738904183058 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 132.734702333939 Dec: 71.1763691975358 [deg; J2000]
{ 08h 50m 56.3s , +71d 10' 34.9" }
+/- 1.35221546255836 [arcmin] (estimated 90% radius based on SNR)
+/- 0.477933067377817 [arcmin] (formal 1-sigma fit error)
SNR: 19.7655978321549
Angular difference between Flight and Ground position is 2.210305 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 29 +/- 6.70820393249937
Measured from: -23.1839998960495
to: 5.8160001039505 [s; relative to TRIGTIME]
T50: 14 +/- 8.06225774829855
Measured from: -12.1839998960495
to: 1.8160001039505 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.184000015258789
to: 0.815999984741211 [s; relative to TRIGTIME]
Total Fluence
Measured from: -25.1840000152588
to: 7.81599998474121 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.482480 0.725969 0.710125 0.071475
0.051634 0.054380 0.048342 0.040039 [error]
Peak 0.027106 0.072684 0.086293 0.033072
0.009557 0.010632 0.010598 0.008094 [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 1.52e-07 3.08e-07 4.84e-07 1.68e-06 1.35e-06 2.63e-06 erg/cm2
Error 2.09e-08 2.58e-08 4.58e-08 3.46e-07 1.14e-07 3.78e-07 erg/cm2
Peak flux Power-law 3.00e-01 4.39e-01 4.78e-01 9.75e-01 1.52e+00 2.19e+00 ph/cm2/s
Error 9.47e-02 8.80e-02 7.65e-02 3.17e-01 2.43e-01 3.73e-01 ph/cm2/s
Fluence Cutoff-PL 1.31e-07 3.28e-07 5.14e-07 6.70e-07 1.29e-06 1.64e-06 erg/cm2
Error 2.60e-08 3.11e-08 5.31e-08 4.73e-07 1.24e-07 4.80e-07 erg/cm2
Peak flux Cutoff-PL 2.04e-01 4.63e-01 5.63e-01 3.70e-01 1.46e+00 1.60e+00 ph/cm2/s
Error 1.09e-01 1.05e-01 1.03e-01 2.96e-01 2.45e-01 3.74e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.27e-01 4.61e-01 5.47e-01 4.46e-01 1.49e+00 1.68e+00 ph/cm2/s
Error -------- -------- 1.03e-01 -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.347 0.130 - - 4.18e-03 3.21e-04 66.220 57
CPL 0.604 0.607 99.2 79.1 9.50e-03 6.90e-03 61.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.877 0.248 - - 1.32e-02 2.12e-03 57.170 57
CPL -0.478 1.233 109.0 94.0 5.01e-02 7.90e-02 52.110 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: 8.000000 sec.
T50 in the 50-300 keV band: 4.800000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 33.000 -25.184 7.816
T90 29.000 -23.184 5.816
T50 14.000 -12.184 1.816
Peak 1.000 -0.184 0.816
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
132.7347 +71.1764 0.0097 25.1 91.8 2.1223 19.8 TRIG_01014316
------------------------------------------
Foreground time interval of the image:
-25.184 7.816 (delta_t = 33.000 [sec])
Background time interval of the image:
-239.184 -217.824 (delta_t = 21.360 [sec])
-216.184 -30.114 (delta_t = 186.070 [sec])
-29.184 -25.184 (delta_t = 4.000 [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 -25.184 sec. to 7.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.34661 ( -0.130608 0.130389 )
Norm@50keV : 4.17793E-03 ( -0.000320964 0.000320759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 66.22 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.89e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 33 sec: 0.502970 ( -0.0396297 0.0396962 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.34759e-06 ( -1.13861e-07 1.14534e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -25.184 sec. to 7.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.603868 ( -0.650237 0.564273 )
Epeak [keV] : 99.2305 ( -24.2141 133.938 )
Norm@50keV : 9.49970E-03 ( -0.00433092 0.0094688 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 61.00 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 3.01e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 33 sec: 0.486261 ( -0.041873 0.041678 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.28724e-06 ( -1.23836e-07 1.24205e-07 ) ergs/cm2
Band function
Time interval is from -25.184 sec. to 7.816 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.578256 ( -0.58305 0.763946 )
beta : -2.19502 ( 2.20166 0.741251 )
Epeak [keV] : 96.6630 ( -32.177 94.0507 )
Norm@50keV : 9.82052E-03 ( -0.00463878 0.0146688 )
------------------------------------------------------------
Photon flux (15-150 keV) in 33 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] : 17.1867 (-1.49839 1.681)
R^2/D10^2 : 3.76116E-02 (-0.010324 0.0138543)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 80.30 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.27e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.444e-08 1.158e-08
25- 50 3.322e-07 3.729e-08
50-150 7.031e-07 9.471e-08
15-150 1.110e-06 1.137e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-25.8453 -200)
Norm : 2.09078 (-0.160559 0.160559)
------------------------------------------------------------
#Fit statistic : Chi-Squared 70.18 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 1.13e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.718e-07 1.554e-08
25- 50 3.306e-07 3.226e-08
50-150 7.250e-07 2.273e-07
15-150 1.227e-06 2.836e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.05744 (-1.89454 2.93692)
R1^2/D10^2 : 1.10246 (-0.875702 4.45778)
kT2 [keV] : 20.8922 (-2.72415 4.69272)
R2^2/D10^2 : 1.75017E-02 (-0.00955408 0.0118268)
------------------------------------------------------------
#Fit statistic : Chi-Squared 60.23 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 2.92e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.403e-07 5.996e-08
25- 50 3.068e-07 8.169e-08
50-150 7.979e-07 1.601e-07
15-150 1.245e-06 2.237e-07
Peak spectrum fit
Power-law model
Time interval is from -0.184 sec. to 0.816 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.876725 ( -0.254274 0.241427 )
Norm@50keV : 1.32136E-02 ( -0.00213362 0.002115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 57.17 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 4.69e-01 with 57 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.51649 ( -0.242779 0.243833 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49656e-07 ( -2.43297e-08 2.44569e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.184 sec. to 0.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.477919 ( -1.40364 1.06198 )
Epeak [keV] : 108.951 ( -28.8583 159.073 )
Norm@50keV : 5.01423E-02 ( -0.03195 0.126007 )
------------------------------------------------------------
#Fit statistic : Chi-Squared 52.11 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.23e-01 with 56 degrees of freedom
Photon flux (15-150 keV) in 1 sec: 1.46354 ( -0.24435 0.2465 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44077e-07 ( -2.5717e-08 2.5627e-08 ) ergs/cm2
Band function
Time interval is from -0.184 sec. to 0.816 sec.
XSPEC12>exit
XSPEC: quit
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.479695 ( -0.81371 1.78753 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 108.877 ( -22.8044 158.542 )
Norm@50keV : 5.02298E-02 ( -0.0320386 0.126001 )
------------------------------------------------------------
Photon flux (15-150 keV) in 1 sec: 1.48738 ( ) 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] : 23.5832 (-3.98387 5.16073)
R^2/D10^2 : 4.74941E-02 (-0.021779 0.0372922)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared 53.37 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.12e-01 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.728e-09 1.361e-09
25- 50 2.601e-08 7.340e-09
50-150 1.079e-07 2.901e-08
15-150 1.387e-07 3.014e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-33.2704 -200)
Norm : 6.01961 (-1.01494 1.01494)
------------------------------------------------------------
#Fit statistic : Chi-Squared 75.52 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 5.08e-02 with 57 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.499e-08 8.715e-09
25- 50 2.884e-08 1.670e-08
50-150 6.325e-08 3.617e-08
15-150 1.071e-07 6.140e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.1259 (-10.1279 -10.1279)
R1^2/D10^2 : 0.198444 (-0.199005 -0.199005)
kT2 [keV] : 29.1751 (-29.2073 -29.2073)
R2^2/D10^2 : 2.09916E-02 (-0.0209142 0.0454833)
------------------------------------------------------------
#Fit statistic : Chi-Squared 51.55 using 59 bins.
Reduced chi-squared =
# Null hypothesis probability of 6.07e-01 with 55 degrees of freedom
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.004e-09 3.917e-09
25- 50 2.786e-08 1.567e-08
50-150 1.110e-07 6.170e-08
15-150 1.459e-07 8.005e-08
Plot creation:
Wed Dec 23 18:51:51 EST 2020