batgrbproduct analysis for trigger=944091
batgrbproduct Analysis for Trigger=944091
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 v2.46
Process Start Time (local time): Sat Dec 14 16:52:19 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger944091/GCN5_download_cron
======================================================================
Trigger: 00944091 Segment: 000
BAT Trigger Time: 597902808 [s; MET]
Trigger Stop: 597902872 [s; MET]
UTC: 2019-12-13T04:06:23.920500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 224.506862496787 Dec: -9.72629906539117 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.12
Flight Position: [ source = BAT ]
RA: 224.506862496787 Dec: -9.72629906539117 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 224.530131870234 Dec: -9.74496329278295 [deg; J2000]
{ 14h 58m 07.2s , -09d 44' 41.9" }
+/- 2.19473822877006 [arcmin] (estimated 90% radius based on SNR)
+/- 1.19429736491049 [arcmin] (formal 1-sigma fit error)
SNR: 9.89529550080383
Angular difference between Flight and Ground position is 1.774148 arcmin
Partial Coding Fraction: 0.5625 [ including projection effects ]
Duration
T90: 119.199999928474 +/- 16.1194572965608
Measured from: -19.9239999055862
to: 99.2760000228882 [s; relative to TRIGTIME]
T50: 58.6159999370575 +/- 15.5144642302503
Measured from: 13.4680001735687
to: 72.0840001106262 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 99.9479999542236
to: 100.947999954224 [s; relative to TRIGTIME]
Total Fluence
Measured from: -33.5240000486374
to: 104.008000016212 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.901278 1.393634 0.794222 0.345876
0.098523 0.102559 0.090947 0.081925 [error]
Peak 0.010975 0.027744 0.029611 0.009279
0.008714 0.008884 0.008146 0.006882 [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 2.83e-07 5.22e-07 7.41e-07 2.21e-06 2.12e-06 3.76e-06 erg/cm2
Error 4.40e-08 4.84e-08 9.05e-08 5.92e-07 2.16e-07 6.59e-07 erg/cm2
Peak flux Power-law 1.65e-01 1.79e-01 1.38e-01 1.73e-01 5.47e-01 6.55e-01 ph/cm2/s
Error 9.81e-02 7.17e-02 5.89e-02 1.45e-01 2.06e-01 2.45e-01 ph/cm2/s
Fluence Cutoff-PL 2.84e-07 5.23e-07 7.39e-07 2.18e-06 2.11e-06 3.72e-06 erg/cm2
Error 4.41e-08 4.82e-08 9.02e-08 8.52e-07 2.14e-07 6.93e-07 erg/cm2
Peak flux Cutoff-PL 9.77e-02 2.16e-01 1.71e-01 3.21e-02 5.13e-01 5.16e-01 ph/cm2/s
Error 1.12e-01 1.23e-01 8.29e-02 9.99e-02 2.08e-01 2.18e-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 1.495 0.164 - - 1.62e-03 1.48e-04 72.340 57
CPL 2.385 0.165 133.2 0.0 5.49e-04 3.09e-04 71.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.376 0.573 - - 4.51e-03 1.67e-03 52.180 57
CPL -1.192 5.339 64.4 -22.5 7.95e-02 2.06e+01 49.510 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 137.532 -33.524 104.008
T90 119.200 -19.924 99.276
T50 58.616 13.468 72.084
Peak 1.000 99.948 100.948
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
224.5301 -9.7450 0.0194 26.1 -100.9 2.0037 9.9 TRIG_00944091
------------------------------------------
Foreground time interval of the image:
-33.524 72.801 (delta_t = 106.325 [sec])
Background time interval of the image:
-203.799 -33.524 (delta_t = 170.275 [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 -33.524 sec. to 104.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49452 ( -0.163292 0.164568 )
Norm@50keV : 1.62034E-03 ( -0.000148912 0.000147859 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.34 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 57 degrees of freedom
# Null hypothesis probability = 8.288370e-02
Photon flux (15-150 keV) in 137.5 sec: 0.201985 ( -0.0181883 0.0182181 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11546e-06 ( -2.15029e-07 2.1728e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -33.524 sec. to 104.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.38475 ( -0.168467 0.1617 )
Epeak [keV] : 133.170 ( -9999.36 -9999.36 )
Norm@50keV : 5.49083E-04 ( -0.00023545 0.00038219 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.39 using 59 PHA bins.
# Reduced chi-squared = 1.275 for 56 degrees of freedom
# Null hypothesis probability = 8.062534e-02
Photon flux (15-150 keV) in 137.5 sec: 0.202184 ( -0.018445 0.017975 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11119e-06 ( -2.11241e-07 2.16989e-07 ) ergs/cm2
Band function
Time interval is from -33.524 sec. to 104.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.966297 ( 0.953139 0.953139 )
beta : -1.54014 ( 1.54087 0.197391 )
Epeak [keV] : 62.0776 ( -59.9341 -59.9341 )
Norm@50keV : 3.59745E-03 ( -0.00236004 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.17 using 59 PHA bins.
# Reduced chi-squared = 1.312 for 55 degrees of freedom
# Null hypothesis probability = 6.005761e-02
Photon flux (15-150 keV) in 137.5 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] : 13.5031 ( )
R^2/D10^2 : 3.19343E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 114.05 using 59 PHA bins.
# Reduced chi-squared = 2.0009 for 57 degrees of freedom
# Null hypothesis probability = 1.099176e-05
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.696e-07 3.209e-08
25- 50 6.080e-07 7.721e-08
50-150 7.161e-07 1.386e-07
15-150 1.494e-06 1.788e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-56.2756 -200)
Norm : 0.823456 (-0.072788 0.072788)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.42 using 59 PHA bins.
# Reduced chi-squared = 1.306 for 57 degrees of freedom
# Null hypothesis probability = 6.044797e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.820e-07 4.125e-08
25- 50 5.424e-07 2.164e-07
50-150 1.190e-06 5.537e-07
15-150 2.014e-06 6.443e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.26268 (-1.36031 1.49972)
R1^2/D10^2 : 0.143383 (-0.0618846 0.121433)
kT2 [keV] : 48.0646 (-17.0201 77.237)
R2^2/D10^2 : 4.15682E-04 (-0.000343326 0.00102844)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.35 using 59 PHA bins.
# Reduced chi-squared = 1.225 for 55 degrees of freedom
# Null hypothesis probability = 1.226191e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.639e-07 7.157e-08
25- 50 5.671e-07 1.479e-07
50-150 1.385e-06 6.892e-07
15-150 2.216e-06 8.104e-07
Peak spectrum fit
Power-law model
Time interval is from 99.948 sec. to 100.948 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37642 ( -0.574963 0.571323 )
Norm@50keV : 4.51282E-03 ( -0.00167734 0.00167248 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.18 using 59 PHA bins.
# Reduced chi-squared = 0.9154 for 57 degrees of freedom
# Null hypothesis probability = 6.561851e-01
Photon flux (15-150 keV) in 1 sec: 0.546765 ( -0.205013 0.206658 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.38065e-08 ( -1.72255e-08 1.77097e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 99.948 sec. to 100.948 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.19214 ( -8.02564 2.65325 )
Epeak [keV] : 64.3518 ( -19.4395 -64.3739 )
Norm@50keV : 7.94919E-02 ( -0.0792835 41.1066 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.51 using 59 PHA bins.
# Reduced chi-squared = 0.8842 for 56 degrees of freedom
# Null hypothesis probability = 7.171976e-01
Photon flux (15-150 keV) in 1 sec: 0.512581 ( -0.207647 0.20897 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.9822e-08 ( -1.55302e-08 1.75499e-08 ) ergs/cm2
Band function
Time interval is from 99.948 sec. to 100.948 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.19902 ( -1.03237 5.42614 )
beta : -10.00000 ( 10 7.3026e-11 )
Epeak [keV] : 64.1100 ( -19.1888 -64.11 )
Norm@50keV : 8.07433E-02 ( -0.0279771 2.90137 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.52 using 59 PHA bins.
# Reduced chi-squared = 0.9003 for 55 degrees of freedom
# Null hypothesis probability = 6.834178e-01
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] : 16.3999 (-4.70574 6.71733)
R^2/D10^2 : 5.29421E-02 (-0.0529426 0.115073)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.46 using 59 PHA bins.
# Reduced chi-squared = 0.8678 for 57 degrees of freedom
# Null hypothesis probability = 7.506309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.927e-09 1.929e-09
25- 50 1.258e-08 7.675e-09
50-150 2.386e-08 1.651e-08
15-150 3.937e-08 2.559e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-199.363 -199.363)
Norm : 2.30286 (-0.841799 0.84204)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.80 using 59 PHA bins.
# Reduced chi-squared = 0.9088 for 57 degrees of freedom
# Null hypothesis probability = 6.698075e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.734e-09 3.727e-09
25- 50 1.103e-08 6.950e-09
50-150 2.419e-08 1.510e-08
15-150 4.096e-08 2.604e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.10366 (-6.09117 -6.09117)
R1^2/D10^2 : 0.245244 (-0.246957 -0.246957)
kT2 [keV] : 17.4418 (-10.013 -17.4436)
R2^2/D10^2 : 3.99440E-02 (-0.0399324 0.122794)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8969 for 55 degrees of freedom
# Null hypothesis probability = 6.901898e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.701e-09 2.192e-09
25- 50 1.238e-08 8.275e-09
50-150 2.441e-08 1.711e-08
15-150 4.049e-08 2.861e-08
Plot creation:
Sat Dec 14 16:55:25 EST 2019