batgrbproduct analysis for trigger=954520
batgrbproduct Analysis for Trigger=954520
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): Thu Feb 6 20:08:26 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger954520/GCN5_download_cron
======================================================================
Trigger: 00954520 Segment: 000
BAT Trigger Time: 602623727.936 [s; MET]
Trigger Stop: 602623728.448 [s; MET]
UTC: 2020-02-05T19:28:23.550920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 107.860794319598 Dec: -56.5061613716509 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.62
Image Trigger?: NO
Rate S/N Ratio: 10.5356537528527 [ if not an image trigger ]
Image S/N Ratio: 7.62
Flight Position: [ source = BAT ]
RA: 107.860794319598 Dec: -56.5061613716509 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 107.781314784248 Dec: -56.4874228272812 [deg; J2000]
{ 07h 11m 07.5s , -56d 29' 14.7" }
+/- 0.742846176876626 [arcmin] (estimated 90% radius based on SNR)
+/- 0.237632063822854 [arcmin] (formal 1-sigma fit error)
SNR: 46.5102349585135
Angular difference between Flight and Ground position is 2.862341 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 116.295999884605 +/- 2.32044827038101
Measured from: -7.53999984264374
to: 108.756000041962 [s; relative to TRIGTIME]
T50: 52.6959998607635 +/- 3.34212926721292
Measured from: 4.87600016593933
to: 57.5720000267029 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 37.9559999704361
to: 38.9559999704361 [s; relative to TRIGTIME]
Total Fluence
Measured from: -12.9279999732971
to: 120.460000038147 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.362787 4.071702 2.406200 0.430827
0.068145 0.070083 0.059867 0.050989 [error]
Peak 0.078602 0.102536 0.068682 0.013508
0.006739 0.007219 0.006343 0.004723 [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 1.08e-06 1.61e-06 1.79e-06 3.77e-06 5.62e-06 8.24e-06 erg/cm2
Error 5.03e-08 4.29e-08 6.22e-08 2.89e-07 1.46e-07 3.30e-07 erg/cm2
Peak flux Power-law 7.20e-01 6.84e-01 4.52e-01 4.64e-01 2.05e+00 2.32e+00 ph/cm2/s
Error 9.31e-02 5.64e-02 5.01e-02 1.02e-01 1.65e-01 1.91e-01 ph/cm2/s
Fluence Cutoff-PL 9.78e-07 1.66e-06 1.82e-06 1.95e-06 5.38e-06 6.40e-06 erg/cm2
Error 6.44e-08 4.93e-08 6.66e-08 5.24e-07 1.77e-07 5.59e-07 erg/cm2
Peak flux Cutoff-PL 6.74e-01 7.17e-01 4.64e-01 2.72e-01 2.01e+00 2.13e+00 ph/cm2/s
Error 1.07e-01 6.96e-02 5.48e-02 1.79e-01 1.70e-01 2.49e-01 ph/cm2/s
Fluence Band 9.46e-07 1.67e-06 1.78e-06 2.76e-06 5.37e-06 7.18e-06 erg/cm2
Error 6.91e-08 5.33e-08 7.11e-08 -------- 1.72e-07 -------- erg/cm2
Peak flux Band 6.68e-01 7.17e-01 4.68e-01 2.76e-01 2.01e+00 2.13e+00 ph/cm2/s
Error 1.05e-01 -------- -------- -------- 1.68e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.845 0.049 - - 4.58e-03 1.18e-04 58.000 57
CPL 1.357 0.219 65.6 10.8 7.96e-03 1.97e-03 41.920 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.599 0.139 - - 1.59e-02 1.37e-03 58.380 57
CPL 1.155 0.546 90.6 -30.8 2.73e-02 2.01e-02 56.260 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: 117.056000 sec.
T50 in the 50-300 keV band: 48.384000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 133.388 -12.928 120.460
T90 116.296 -7.540 108.756
T50 52.696 4.876 57.572
Peak 1.000 37.956 38.956
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
107.7813 -56.4874 0.0042 0.0 -11.2 10.4757 46.5 TRIG_00954520
------------------------------------------
Foreground time interval of the image:
-12.928 120.460 (delta_t = 133.388 [sec])
Background time interval of the image:
-68.035 -12.928 (delta_t = 55.107 [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 -12.928 sec. to 120.460 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.84497 ( -0.0489831 0.049235 )
Norm@50keV : 4.57807E-03 ( -0.000118254 0.000118057 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.00 using 59 PHA bins.
# Reduced chi-squared = 1.018 for 57 degrees of freedom
# Null hypothesis probability = 4.381806e-01
Photon flux (15-150 keV) in 133.4 sec: 0.642184 ( -0.0179527 0.0180229 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.61581e-06 ( -1.46036e-07 1.46268e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -12.928 sec. to 120.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35711 ( -0.224206 0.213386 )
Epeak [keV] : 65.6362 ( -7.28499 14.2346 )
Norm@50keV : 7.96293E-03 ( -0.00167791 0.00226254 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.92 using 59 PHA bins.
# Reduced chi-squared = 0.7485 for 56 degrees of freedom
# Null hypothesis probability = 9.189243e-01
Photon flux (15-150 keV) in 133.4 sec: 0.616417 ( -0.020662 0.020776 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37659e-06 ( -1.77369e-07 1.77555e-07 ) ergs/cm2
Band function
Time interval is from -12.928 sec. to 120.460 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17398 ( -0.293766 0.421354 )
beta : -2.16778 ( 2.1688 0.176498 )
Epeak [keV] : 57.1868 ( -10.957 13.0157 )
Norm@50keV : 1.01280E-02 ( -0.00303936 0.00783337 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.45 using 59 PHA bins.
# Reduced chi-squared = 0.7172 for 55 degrees of freedom
# Null hypothesis probability = 9.436659e-01
Photon flux (15-150 keV) in 133.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37446e-06 ( -5.37353e-06 -1.72166e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.1253 ( )
R^2/D10^2 : 0.103157 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 302.65 using 59 PHA bins.
# Reduced chi-squared = 5.3096 for 57 degrees of freedom
# Null hypothesis probability = 3.598737e-35
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.027e-07 2.495e-08
25- 50 1.749e-06 5.736e-08
50-150 1.916e-06 9.738e-08
15-150 4.168e-06 1.061e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.9369 (-8.15522 12.6286)
Norm : 2.76957 (-0.124294 0.106066)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.97 using 59 PHA bins.
# Reduced chi-squared = 0.7364 for 57 degrees of freedom
# Null hypothesis probability = 9.319286e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.657e-07 5.756e-08
25- 50 1.670e-06 6.337e-08
50-150 2.705e-06 6.276e-07
15-150 5.340e-06 6.303e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.74471 (-0.754351 0.84059)
R1^2/D10^2 : 0.792522 (-0.254073 0.416634)
kT2 [keV] : 21.4569 (-2.11622 3.00121)
R2^2/D10^2 : 1.22775E-02 (-0.00505874 0.00666936)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.544384e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.833e-07 7.144e-08
25- 50 1.680e-06 9.538e-08
50-150 2.663e-06 2.068e-07
15-150 5.226e-06 2.928e-07
Peak spectrum fit
Power-law model
Time interval is from 37.956 sec. to 38.956 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59855 ( -0.13795 0.140653 )
Norm@50keV : 1.59263E-02 ( -0.00138115 0.00136841 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.38 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.245952e-01
Photon flux (15-150 keV) in 1 sec: 2.04568 ( -0.165374 0.165445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48971e-07 ( -1.39135e-08 1.4055e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 37.956 sec. to 38.956 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.15464 ( -0.592686 0.498734 )
Epeak [keV] : 90.6220 ( -28.9869 -90.622 )
Norm@50keV : 2.73439E-02 ( -0.012034 0.0280784 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 56 degrees of freedom
# Null hypothesis probability = 4.652289e-01
Photon flux (15-150 keV) in 1 sec: 2.01085 ( -0.17053 0.17032 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43668e-07 ( -1.5356e-08 1.5414e-08 ) ergs/cm2
Band function
Time interval is from 37.956 sec. to 38.956 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.15462 ( -0.33779 0.645972 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 90.6054 ( -28.5064 -90.6054 )
Norm@50keV : 2.73417E-02 ( -0.0120349 0.028161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.26 using 59 PHA bins.
# Reduced chi-squared = 1.023 for 55 degrees of freedom
# Null hypothesis probability = 4.276191e-01
Photon flux (15-150 keV) in 1 sec: 2.00886 ( 4.99114 -0.16698 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.44196e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.3549 (-1.34609 1.5188)
R^2/D10^2 : 0.343706 (-0.109286 0.158385)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.43 using 59 PHA bins.
# Reduced chi-squared = 1.569 for 57 degrees of freedom
# Null hypothesis probability = 3.915241e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.299e-08 1.915e-09
25- 50 4.604e-08 4.470e-09
50-150 5.272e-08 9.290e-09
15-150 1.118e-07 1.190e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 166.999 (-54.0634 -167.266)
Norm : 8.40889 (-0.722477 0.807273)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.37 using 59 PHA bins.
# Reduced chi-squared = 0.9890 for 57 degrees of freedom
# Null hypothesis probability = 4.986621e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.138e-08 3.810e-09
25- 50 4.023e-08 1.072e-08
50-150 8.285e-08 4.393e-08
15-150 1.445e-07 5.957e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.65527 (-1.86845 2.09265)
R1^2/D10^2 : 2.56052 (-1.47185 5.51636)
kT2 [keV] : 23.4174 (-5.3397 10.8664)
R2^2/D10^2 : 3.56766E-02 (-0.026839 0.0625173)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.92 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Null hypothesis probability = 4.033492e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.075e-08 7.057e-09
25- 50 4.062e-08 1.354e-08
50-150 8.177e-08 4.123e-08
15-150 1.431e-07 5.579e-08
Plot creation:
Thu Feb 6 20:13:19 EST 2020