batgrbproduct analysis for trigger=938899
batgrbproduct Analysis for Trigger=938899
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): Sun Nov 24 01:38:08 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger938899/GCN5_download_cron
======================================================================
Trigger: 00938899 Segment: 000
BAT Trigger Time: 596122400.384 [s; MET]
Trigger Stop: 596122402.432 [s; MET]
UTC: 2019-11-22T13:32:56.419620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 54.2959315816296 Dec: -32.1758874824898 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.61
Image Trigger?: NO
Rate S/N Ratio: 14.4913767461894 [ if not an image trigger ]
Image S/N Ratio: 11.61
Flight Position: [ source = BAT ]
RA: 54.2959315816296 Dec: -32.1758874824898 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 54.2904826018526 Dec: -32.1764969903272 [deg; J2000]
{ 03h 37m 09.7s , -32d 10' 35.4" }
+/- 0.97408028632192 [arcmin] (estimated 90% radius based on SNR)
+/- 0.235208001726352 [arcmin] (formal 1-sigma fit error)
SNR: 31.5799609355995
Angular difference between Flight and Ground position is 0.279132 arcmin
Partial Coding Fraction: 0.2695312 [ including projection effects ]
Duration
T90: 153.375999927521 +/- 35.8836794243642
Measured from: -6.45199978351593
to: 146.924000144005 [s; relative to TRIGTIME]
T50: 35.9319999217987 +/- 4.13941060478775
Measured from: 1.78400015830994
to: 37.7160000801086 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.44400000572205
to: 7.44400000572205 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.1199998855591
to: 245.444000005722 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.034928 4.263014 2.873983 0.567457
0.124484 0.132147 0.114476 0.094374 [error]
Peak 0.093480 0.150163 0.100423 0.023044
0.013263 0.015540 0.013295 0.009813 [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 1.10e-06 1.82e-06 2.29e-06 5.72e-06 6.81e-06 1.09e-05 erg/cm2
Error 7.45e-08 7.36e-08 1.16e-07 6.29e-07 2.78e-07 7.13e-07 erg/cm2
Peak flux Power-law 1.17e+00 1.04e+00 6.38e-01 5.94e-01 3.10e+00 3.44e+00 ph/cm2/s
Error 2.10e-01 1.25e-01 1.06e-01 1.91e-01 3.70e-01 4.14e-01 ph/cm2/s
Fluence Cutoff-PL 1.02e-06 1.89e-06 2.35e-06 3.16e-06 6.60e-06 8.42e-06 erg/cm2
Error 9.04e-08 8.66e-08 1.27e-07 1.17e-06 3.10e-07 1.20e-06 erg/cm2
Peak flux Cutoff-PL 1.10e+00 1.09e+00 6.60e-01 3.68e-01 3.07e+00 3.23e+00 ph/cm2/s
Error 2.35e-01 1.56e-01 1.18e-01 -------- 3.73e-01 4.88e-01 ph/cm2/s
Fluence Band 9.62e-07 1.94e-06 2.26e-06 4.77e-06 6.62e-06 9.94e-06 erg/cm2
Error -------- 1.02e-07 1.22e-07 -------- 2.99e-07 9.22e-07 erg/cm2
Peak flux Band 1.09e+00 1.09e+00 6.66e-01 3.70e-01 3.06e+00 3.22e+00 ph/cm2/s
Error 2.30e-01 -------- -------- -------- 3.71e-01 -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.672 0.069 - - 2.87e-03 1.12e-04 76.480 57
CPL 1.242 0.284 89.2 41.9 4.69e-03 1.53e-03 69.110 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.704 0.199 - - 2.33e-02 3.03e-03 59.150 57
CPL 1.293 0.601 81.6 -23.0 3.87e-02 4.15e-02 58.130 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: 40.576000 sec.
T50 in the 50-300 keV band: 16.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 256.564 -11.120 245.444
T90 153.376 -6.452 146.924
T50 35.932 1.784 37.716
Peak 1.000 6.444 7.444
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
54.2905 -32.1765 0.0061 34.8 114.2 7.6525 31.6 TRIG_00938899
------------------------------------------
Foreground time interval of the image:
-11.120 28.317 (delta_t = 39.437 [sec])
Background time interval of the image:
-239.384 -11.120 (delta_t = 228.264 [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
Multiple GTIs in the spectrum
tstart tstop
-11.120000 106.846000
107.616000 245.444000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67225 ( -0.0690291 0.0694419 )
Norm@50keV : 2.86991E-03 ( -0.000111818 0.000111601 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.48 using 59 PHA bins.
# Reduced chi-squared = 1.342 for 57 degrees of freedom
# Null hypothesis probability = 4.354282e-02
Photon flux (15-150 keV) in 255.8 sec: 0.377535 ( -0.0152633 0.0152994 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.81313e-06 ( -2.77883e-07 2.78648e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-11.120000 106.846000
107.616000 245.444000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.24240 ( -0.293554 0.275271 )
Epeak [keV] : 89.1994 ( -17.9087 65.888 )
Norm@50keV : 4.68508E-03 ( -0.00123416 0.00181735 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.11 using 59 PHA bins.
# Reduced chi-squared = 1.234 for 56 degrees of freedom
# Null hypothesis probability = 1.120671e-01
Photon flux (15-150 keV) in 255.8 sec: 0.367668 ( -0.016358 0.016403 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.60217e-06 ( -3.10644e-07 3.10004e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-11.120000 106.846000
107.616000 245.444000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.25398 ( -0.251702 0.303936 )
beta : -9.37157 ( 9.37166 19.3717 )
Epeak [keV] : 90.6885 ( -19.427 68.2221 )
Norm@50keV : 4.61461E-03 ( -0.00106928 0.00188664 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.12 using 59 PHA bins.
# Reduced chi-squared = 1.257 for 55 degrees of freedom
# Null hypothesis probability = 9.541004e-02
Photon flux (15-150 keV) in 255.8 sec: 0.366529 ( 6.63347 -0.014144 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.6167e-06 ( -6.61491e-06 -2.9834e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.9885 ( )
R^2/D10^2 : 5.16966E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 208.07 using 59 PHA bins.
# Reduced chi-squared = 3.6504 for 57 degrees of freedom
# Null hypothesis probability = 4.603681e-19
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.466e-07 4.170e-08
25- 50 2.031e-06 9.746e-08
50-150 2.616e-06 1.967e-07
15-150 5.195e-06 2.136e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 151.340 (-27.0524 30.8108)
Norm : 1.54132 (-0.0693987 0.0852219)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.14 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.300024e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.005e-06 6.651e-08
25- 50 1.870e-06 1.264e-07
50-150 3.724e-06 1.006e-06
15-150 6.599e-06 1.088e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.58708 (-0.866669 0.895986)
R1^2/D10^2 : 0.316830 (-0.0968121 0.159383)
kT2 [keV] : 26.4276 (-3.42095 4.79043)
R2^2/D10^2 : 3.82183E-03 (-0.00174498 0.00269138)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.56 using 59 PHA bins.
# Reduced chi-squared = 1.192 for 55 degrees of freedom
# Null hypothesis probability = 1.559156e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.238e-07 1.010e-07
25- 50 1.959e-06 1.947e-07
50-150 3.724e-06 6.293e-07
15-150 6.607e-06 9.030e-07
Peak spectrum fit
Power-law model
Time interval is from 6.444 sec. to 7.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70436 ( -0.195071 0.203421 )
Norm@50keV : 2.32753E-02 ( -0.00306032 0.00300877 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.15 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 57 degrees of freedom
# Null hypothesis probability = 3.970538e-01
Photon flux (15-150 keV) in 1 sec: 3.09595 ( -0.369481 0.369575 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.15428e-07 ( -2.93916e-08 2.97027e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.444 sec. to 7.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29254 ( -0.809254 0.393397 )
Epeak [keV] : 81.6122 ( -35.6309 -81.6126 )
Norm@50keV : 3.87220E-02 ( -0.0178322 0.065257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.13 using 59 PHA bins.
# Reduced chi-squared = 1.038 for 56 degrees of freedom
# Null hypothesis probability = 3.968345e-01
Photon flux (15-150 keV) in 1 sec: 3.06757 ( -0.37277 0.37267 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.10343e-07 ( -3.117e-08 3.1141e-08 ) ergs/cm2
Band function
Time interval is from 6.444 sec. to 7.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29291 ( -0.385832 0.849467 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 81.6247 ( -30.1711 -81.6247 )
Norm@50keV : 3.87004E-02 ( -0.0178162 0.0653036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.13 using 59 PHA bins.
# Reduced chi-squared = 1.057 for 55 degrees of freedom
# Null hypothesis probability = 3.608455e-01
Photon flux (15-150 keV) in 1 sec: 3.06375 ( 3.93625 -0.36855 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11471e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.2954 (-1.90076 2.2956)
R^2/D10^2 : 0.699489 (-0.322007 0.586404)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.05 using 59 PHA bins.
# Reduced chi-squared = 1.369 for 57 degrees of freedom
# Null hypothesis probability = 3.351946e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.240e-08 4.895e-09
25- 50 7.252e-08 1.257e-08
50-150 6.698e-08 1.880e-08
15-150 1.619e-07 2.530e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 133.764 (-51.1567 -132.018)
Norm : 12.9712 (-1.752 2.25509)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.15 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.328820e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.360e-08 5.440e-09
25- 50 6.120e-08 1.716e-08
50-150 1.150e-07 6.137e-08
15-150 2.098e-07 8.528e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.36240 (-1.64192 2.01691)
R1^2/D10^2 : 5.26128 (-3.22474 6.01236)
kT2 [keV] : 24.1710 (-6.19152 12.0111)
R2^2/D10^2 : 4.53351E-02 (-0.0347576 0.0954547)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.11 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 55 degrees of freedom
# Null hypothesis probability = 4.330038e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.532e-08 1.606e-08
25- 50 6.073e-08 2.433e-08
50-150 1.176e-07 6.450e-08
15-150 2.136e-07 9.820e-08
Plot creation:
Sun Nov 24 01:41:47 EST 2019