batgrbproduct analysis for trigger=810300
batgrbproduct Analysis for Trigger=810300
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 Feb 17 09:13:22 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger810300/GCN5_download_cron
======================================================================
Trigger: 00810300 Segment: 000
BAT Trigger Time: 540452264 [s; MET]
Trigger Stop: 540453928 [s; MET]
UTC: 2018-02-16T05:37:23.514500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.544985834946 Dec: -42.7088023980622 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.08
Flight Position: [ source = BAT ]
RA: 254.544985834946 Dec: -42.7088023980622 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 254.536759259037 Dec: -42.7117042188434 [deg; J2000]
{ 16h 58m 08.8s , -42d 42' 42.1" }
+/- 3.0189136159941 [arcmin] (estimated 90% radius based on SNR)
+/- 2.07836877815969 [arcmin] (formal 1-sigma fit error)
SNR: 6.27505302087435
Angular difference between Flight and Ground position is 0.402316 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 1664 +/-
Measured from: 0
to: 1664 [s; relative to TRIGTIME]
T50: 1664 +/-
Measured from: 0
to: 1664 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1664 second)
Measured from: 0
to: 1664 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1664 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.352258 1.840449 0.762000 -0.019211
0.223966 0.208614 0.184408 0.184233 [error]
Peak 1.352258 1.840449 0.762000 -0.019211
0.223966 0.208614 0.184408 0.184233 [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 4.87e-07 6.69e-07 6.78e-07 1.25e-06 2.23e-06 3.08e-06 erg/cm2
Error 9.97e-08 9.82e-08 1.72e-07 6.28e-07 3.96e-07 8.18e-07 erg/cm2
Peak flux Power-law 2.11e-02 1.60e-02 8.10e-03 5.89e-03 4.79e-02 5.10e-02 ph/cm2/s
Error 4.40e-03 2.33e-03 1.98e-03 2.75e-03 6.98e-03 7.52e-03 ph/cm2/s
Fluence Cutoff-PL 4.48e-07 7.56e-07 6.14e-07 2.20e-07 1.98e-06 2.04e-06 erg/cm2
Error 1.13e-07 1.39e-07 2.18e-07 5.01e-07 4.37e-07 8.85e-07 erg/cm2
Peak flux Cutoff-PL 1.91e-02 1.80e-02 7.58e-03 1.41e-03 4.58e-02 4.61e-02 ph/cm2/s
Error 5.03e-03 3.25e-03 2.47e-03 3.39e-03 7.27e-03 7.81e-03 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 1.980 0.275 - - 3.22e-04 5.95e-05 53.030 57
CPL 0.866 1.425 40.6 0.0 1.47e-03 0.00e+00 50.610 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.980 0.275 - - 3.22e-04 5.95e-05 53.030 57
CPL 0.866 1.425 40.6 0.0 1.47e-03 0.00e+00 50.610 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 1664.000 0.000 1664.000
T90 1664.000 0.000 1664.000
T50 1664.000 0.000 1664.000
Peak 1664.000 0.000 1664.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
254.5368 -42.7117 0.0308 24.9 30.5 4.5810 6.3 TRIG_00810300
------------------------------------------
Foreground time interval of the image:
210.000 963.016 (delta_t = 753.016 [sec])
Background time interval of the image:
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 210.000 sec. to 963.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98029 ( -0.266264 0.284288 )
Norm@50keV : 3.22138E-04 ( -6.0278e-05 5.87928e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.03 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 57 degrees of freedom
# Null hypothesis probability = 6.249048e-01
Photon flux (15-150 keV) in 753 sec: 4.78879E-02 ( -0.00698142 0.00698326 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23487e-06 ( -3.89254e-07 4.03335e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 210.000 sec. to 963.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.865847 ( -1.66498 1.18575 )
Epeak [keV] : 40.5752 ( )
Norm@50keV : 1.46673E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9037 for 56 degrees of freedom
# Null hypothesis probability = 6.784181e-01
Photon flux (15-150 keV) in 753 sec: 4.58131E-02 ( -0.0072434 0.0072965 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9811e-06 ( -4.01469e-07 4.73306e-07 ) ergs/cm2
Band function
Time interval is from 210.000 sec. to 963.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.916600 ( 1.22113 1.22113 )
beta : -9.92600 ( 7.30316 17.3032 )
Epeak [keV] : 40.6274 ( -11.0028 20.8742 )
Norm@50keV : 1.36965E-03 ( -0.000197539 106767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9202 for 55 degrees of freedom
# Null hypothesis probability = 6.428336e-01
Photon flux (15-150 keV) in 753 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] : 9.87607 (-1.5031 1.80691)
R^2/D10^2 : 2.35557E-02 (-0.0112451 0.0210335)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.67 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 57 degrees of freedom
# Null hypothesis probability = 5.250795e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.508e-07 8.784e-08
25- 50 8.569e-07 1.878e-07
50-150 4.313e-07 1.652e-07
15-150 1.639e-06 3.494e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.8320 (-22.3595 45.9353)
Norm : 0.245069 (-0.0531666 0.0688516)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014707e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.681e-07 9.529e-08
25- 50 7.258e-07 1.292e-07
50-150 8.684e-07 3.925e-07
15-150 2.062e-06 5.448e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.10049 (-3.01697 87.2253)
R1^2/D10^2 : 0.158922 (-0.132481 10.7533)
kT2 [keV] : 14.3015 (-4.39786 78.8093)
R2^2/D10^2 : 4.27676E-03 (-0.00426632 0.0175578)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9215 for 55 degrees of freedom
# Null hypothesis probability = 6.401895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.538e-07 2.372e-07
25- 50 7.432e-07 3.825e-07
50-150 7.274e-07 4.420e-07
15-150 1.924e-06 9.928e-07
Peak spectrum fit
Power-law model
Time interval is from 210.000 sec. to 963.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98029 ( -0.266264 0.284288 )
Norm@50keV : 3.22138E-04 ( -6.0278e-05 5.87928e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.03 using 59 PHA bins.
# Reduced chi-squared = 0.9303 for 57 degrees of freedom
# Null hypothesis probability = 6.249048e-01
Photon flux (15-150 keV) in 753 sec: 4.78879E-02 ( -0.00698142 0.00698326 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.23487e-06 ( -3.89254e-07 4.03335e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 210.000 sec. to 963.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.865847 ( -1.66498 1.18575 )
Epeak [keV] : 40.5752 ( )
Norm@50keV : 1.46673E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9037 for 56 degrees of freedom
# Null hypothesis probability = 6.784181e-01
Photon flux (15-150 keV) in 753 sec: 4.58131E-02 ( -0.0072434 0.0072965 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9811e-06 ( -4.01469e-07 4.73306e-07 ) ergs/cm2
Band function
Time interval is from 210.000 sec. to 963.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.916600 ( 1.22113 1.22113 )
beta : -9.92600 ( 7.30316 17.3032 )
Epeak [keV] : 40.6274 ( -11.0028 20.8742 )
Norm@50keV : 1.36965E-03 ( -0.000197539 106767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.61 using 59 PHA bins.
# Reduced chi-squared = 0.9202 for 55 degrees of freedom
# Null hypothesis probability = 6.428336e-01
Photon flux (15-150 keV) in 753 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] : 9.87607 (-1.5031 1.80691)
R^2/D10^2 : 2.35557E-02 (-0.0112451 0.0210335)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.67 using 59 PHA bins.
# Reduced chi-squared = 0.9767 for 57 degrees of freedom
# Null hypothesis probability = 5.250795e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.508e-07 1.046e-07
25- 50 8.569e-07 2.010e-07
50-150 4.313e-07 1.498e-07
15-150 1.639e-06 3.328e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 63.8320 (-22.3595 45.9353)
Norm : 0.245069 (-0.0531666 0.0688516)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.91 using 59 PHA bins.
# Reduced chi-squared = 0.8932 for 57 degrees of freedom
# Null hypothesis probability = 7.014707e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.681e-07 9.213e-08
25- 50 7.258e-07 1.258e-07
50-150 8.684e-07 4.094e-07
15-150 2.062e-06 4.748e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.10049 (-3.01697 87.2253)
R1^2/D10^2 : 0.158922 (-0.132481 10.7533)
kT2 [keV] : 14.3015 (-4.39786 78.8093)
R2^2/D10^2 : 4.27676E-03 (-0.00426632 0.0175578)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.68 using 59 PHA bins.
# Reduced chi-squared = 0.9215 for 55 degrees of freedom
# Null hypothesis probability = 6.401895e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.538e-07 2.587e-07
25- 50 7.432e-07 3.776e-07
50-150 7.274e-07 4.507e-07
15-150 1.924e-06 9.733e-07
Plot creation:
Sat Feb 17 09:17:15 EST 2018