batgrbproduct analysis for trigger=814090
batgrbproduct Analysis for Trigger=814090
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): Wed Mar 14 19:41:41 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger814090/GCN5_download_cron
======================================================================
Trigger: 00814090 Segment: 000
BAT Trigger Time: 542656155.52 [s; MET]
Trigger Stop: 542656157.568 [s; MET]
UTC: 2018-03-13T17:48:54.901660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.091196628569 Dec: 7.18817513469049 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.73
Image Trigger?: NO
Rate S/N Ratio: 11.4017542509914 [ if not an image trigger ]
Image S/N Ratio: 6.73
Flight Position: [ source = BAT ]
RA: 275.091196628569 Dec: 7.18817513469049 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.030121569964 Dec: 7.29963485299302 [deg; J2000]
{ 18h 20m 07.2s , +07d 17' 58.7" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.86635689967769 [arcmin] (formal 1-sigma fit error)
SNR: -5.49488717520607
Angular difference between Flight and Ground position is 7.611757 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 134.143999934196 +/- 495.839016969263
Measured from: 284.256000161171
to: 418.400000095367 [s; relative to TRIGTIME]
T50: 54.8680000305176 +/- 57.9801002239824
Measured from: 308.788000106812
to: 363.656000137329 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 374.463999986649
to: 375.463999986649 [s; relative to TRIGTIME]
Total Fluence
Measured from: -209.916000008583
to: 422.128000020981 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.655833 6.703685 4.910962 1.000848
0.201240 0.185547 0.158055 0.138452 [error]
Peak 0.033636 0.038028 0.029298 0.004144
0.011073 0.009780 0.008060 0.006958 [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 1.57e-06 2.74e-06 3.65e-06 9.97e-06 1.06e-05 1.79e-05 erg/cm2
Error 1.03e-07 1.01e-07 1.60e-07 1.01e-06 3.79e-07 1.09e-06 erg/cm2
Peak flux Power-law 3.27e-01 2.89e-01 1.75e-01 1.60e-01 8.59e-01 9.51e-01 ph/cm2/s
Error 1.45e-01 7.75e-02 6.72e-02 1.32e-01 2.28e-01 2.48e-01 ph/cm2/s
Fluence Cutoff-PL 1.57e-06 2.75e-06 3.67e-06 9.22e-06 1.06e-05 1.72e-05 erg/cm2
Error 1.10e-07 1.09e-07 1.63e-07 1.92e-06 4.12e-07 1.70e-06 erg/cm2
Peak flux Cutoff-PL 3.40e-01 2.90e-01 1.69e-01 1.47e-01 8.63e-01 9.52e-01 ph/cm2/s
Error 1.46e-01 7.69e-02 6.38e-02 1.63e-01 1.70e-01 2.46e-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 1.584 0.066 - - 1.80e-03 6.00e-05 59.960 57
CPL 1.584 0.137 9999.4 0.0 1.80e-03 2.52e-04 59.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.723 0.529 - - 6.42e-03 1.87e-03 39.670 57
CPL 1.719 0.856 9999.3 -0.0 6.43e-03 1.16e-02 39.670 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: 8.832000 sec.
T50 in the 50-300 keV band: 5.568000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 632.044 -209.916 422.128
T90 134.144 284.256 418.400
T50 54.868 308.788 363.656
Peak 1.000 374.464 375.464
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.0301 +7.2996 0.0349 0.1 158.6 -6.5470 -5.5 TRIG_00814090
------------------------------------------
Foreground time interval of the image:
-209.916 292.181 (delta_t = 502.097 [sec])
Background time interval of the image:
-239.520 -209.916 (delta_t = 29.604 [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
-209.916000 350.562700
351.480000 422.128000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58417 ( -0.0657469 0.0658571 )
Norm@50keV : 1.79939E-03 ( -6.00058e-05 5.99274e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.96 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 57 degrees of freedom
# Null hypothesis probability = 3.689336e-01
Photon flux (15-150 keV) in 631.1 sec: 0.230111 ( -0.00831353 0.00835922 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06413e-05 ( -3.77865e-07 3.79528e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-209.916000 350.562700
351.480000 422.128000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58440 ( -0.209275 0.0648253 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 1.80197E-03 ( -5.96005e-05 0.000443984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.97 using 59 PHA bins.
# Reduced chi-squared = 1.071 for 56 degrees of freedom
# Null hypothesis probability = 3.337109e-01
Photon flux (15-150 keV) in 631.1 sec: 0.230138 ( -0.008459 0.008196 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.83065e-16 ( 0 0 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-209.916000 350.562700
351.480000 422.128000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.30053 ( 1.30153 1.30153 )
beta : -1.58415 ( -0.065939 0.0657031 )
Epeak [keV] : 32.4672 ( -31.8089 -31.8089 )
Norm@50keV : 3.48879E-03 ( -0.00124275 0.249213 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.96 using 59 PHA bins.
# Reduced chi-squared = 1.090 for 55 degrees of freedom
# Null hypothesis probability = 3.006755e-01
Photon flux (15-150 keV) in 631.1 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] : 15.3635 ( )
R^2/D10^2 : 2.21303E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 280.37 using 59 PHA bins.
# Reduced chi-squared = 4.9187 for 57 degrees of freedom
# Null hypothesis probability = 3.078795e-31
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.873e-07 5.058e-08
25- 50 2.791e-06 1.231e-07
50-150 4.530e-06 3.042e-07
15-150 8.009e-06 3.124e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-32.2007 -200)
Norm : 0.921290 (-0.0304018 0.0304018)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.64 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.023278e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.448e-06 5.901e-08
25- 50 2.785e-06 1.149e-07
50-150 6.107e-06 2.262e-07
15-150 1.034e-05 4.355e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.00308 (-0.857857 0.936606)
R1^2/D10^2 : 0.248282 (-0.0871274 0.152129)
kT2 [keV] : 27.5989 (-3.36829 4.88186)
R2^2/D10^2 : 2.31292E-03 (-0.000993318 0.00138593)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.76 using 59 PHA bins.
# Reduced chi-squared = 1.305 for 55 degrees of freedom
# Null hypothesis probability = 6.402076e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.418e-06 1.521e-07
25- 50 2.781e-06 2.054e-07
50-150 6.299e-06 7.718e-07
15-150 1.050e-05 8.835e-07
Peak spectrum fit
Power-law model
Time interval is from 374.464 sec. to 375.464 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.72346 ( -0.520698 0.537064 )
Norm@50keV : 6.41721E-03 ( -0.00191943 0.00181381 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.67 using 59 PHA bins.
# Reduced chi-squared = 0.6959 for 57 degrees of freedom
# Null hypothesis probability = 9.608871e-01
Photon flux (15-150 keV) in 1 sec: 0.859387 ( -0.227308 0.227813 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.9312e-08 ( -1.76971e-08 1.83847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 374.464 sec. to 375.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.71909 ( -1.16806 0.543069 )
Epeak [keV] : 9999.32 ( -9999.35 -9999.36 )
Norm@50keV : 6.43231E-03 ( -0.00193841 0.0213493 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.67 using 59 PHA bins.
# Reduced chi-squared = 0.7084 for 56 degrees of freedom
# Null hypothesis probability = 9.516107e-01
Photon flux (15-150 keV) in 1 sec: 0.863254 ( -0.115969 0.224456 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.91276e-08 ( -1.76242e-08 1.91354e-08 ) ergs/cm2
Band function
Time interval is from 374.464 sec. to 375.464 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96089 ( -4.96089 -4.96089 )
beta : -1.81009 ( -0.813483 0.570027 )
Epeak [keV] : 21.7727 ( -21.7727 46.9511 )
Norm@50keV : 1887.22 ( -486.724 8.60533e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.37 using 59 PHA bins.
# Reduced chi-squared = 0.7158 for 55 degrees of freedom
# Null hypothesis probability = 9.447473e-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] : 10.2186 (-3.99075 10.3775)
R^2/D10^2 : 0.345141 (-0.332221 2.00624)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.89 using 59 PHA bins.
# Reduced chi-squared = 0.8402 for 57 degrees of freedom
# Null hypothesis probability = 7.995364e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.392e-09 4.573e-09
25- 50 1.894e-08 1.126e-08
50-150 1.052e-08 7.661e-09
15-150 3.686e-08 2.250e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 160.180 (-158.382 -158.382)
Norm : 3.43935 (-0.946179 1.90898)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.52 using 59 PHA bins.
# Reduced chi-squared = 0.7109 for 57 degrees of freedom
# Null hypothesis probability = 9.515263e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.781e-09 5.160e-09
25- 50 1.643e-08 9.525e-09
50-150 3.330e-08 2.030e-08
15-150 5.851e-08 3.474e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.71862 (-1.93905 3.47778)
R1^2/D10^2 : 2.75457 (-2.24844 7.14655)
kT2 [keV] : 36.2914 (-32.5159 -36.2961)
R2^2/D10^2 : 3.83157E-03 (-0.0036438 0.0193591)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 37.78 using 59 PHA bins.
# Reduced chi-squared = 0.6868 for 55 degrees of freedom
# Null hypothesis probability = 9.631638e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.183e-08 6.895e-09
25- 50 1.460e-08 8.060e-09
50-150 3.964e-08 2.372e-08
15-150 6.607e-08 3.609e-08
Plot creation:
Wed Mar 14 19:47:42 EDT 2018