batgrbproduct analysis for trigger=799669
batgrbproduct Analysis for Trigger=799669
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 23 17:41:00 EST 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger799669/GCN5_download_cron
======================================================================
Trigger: 00799669 Segment: 000
BAT Trigger Time: 535652720 [s; MET]
Trigger Stop: 535652800 [s; MET]
UTC: 2017-12-22T16:24:59.803520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 148.293325459001 Dec: 35.6217756112652 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.49
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.49
Flight Position: [ source = BAT ]
RA: 148.293325459001 Dec: 35.6217756112652 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 148.272658852583 Dec: 35.6235850172316 [deg; J2000]
{ 09h 53m 05.4s , +35d 37' 24.9" }
+/- 1.65266244282649 [arcmin] (estimated 90% radius based on SNR)
+/- 0.590368139500006 [arcmin] (formal 1-sigma fit error)
SNR: 14.8397548334684
Angular difference between Flight and Ground position is 1.013786 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 174.835999965668 +/- 22.6645693378338
Measured from: 12.8480001091957
to: 187.684000074863 [s; relative to TRIGTIME]
T50: 89.2599999308586 +/- 18.8045735956071
Measured from: 43.0040001273155
to: 132.264000058174 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 61.3439999818802
to: 62.3439999818802 [s; relative to TRIGTIME]
Total Fluence
Measured from: 8.00400000810623
to: 209.819999992847 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.378929 1.349065 0.665131 0.113123
0.102798 0.105259 0.088136 0.074727 [error]
Peak 0.032806 0.031061 0.012850 -0.001667
0.008585 0.008905 0.007149 0.005774 [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 4.57e-07 5.95e-07 5.67e-07 9.57e-07 1.94e-06 2.58e-06 erg/cm2
Error 5.80e-08 5.17e-08 8.54e-08 2.87e-07 1.96e-07 3.79e-07 erg/cm2
Peak flux Power-law 3.17e-01 2.20e-01 1.01e-01 6.41e-02 6.69e-01 7.02e-01 ph/cm2/s
Error 1.40e-01 7.29e-02 5.74e-02 7.81e-02 2.18e-01 2.30e-01 ph/cm2/s
Fluence Cutoff-PL 4.53e-07 6.03e-07 5.65e-07 7.74e-07 1.92e-06 2.39e-06 erg/cm2
Error 6.28e-08 6.49e-08 8.89e-08 6.03e-07 2.21e-07 5.67e-07 erg/cm2
Peak flux Cutoff-PL 3.09e-01 2.28e-01 1.01e-01 4.48e-02 6.65e-01 6.83e-01 ph/cm2/s
Error 1.53e-01 8.96e-02 8.24e-02 7.62e-02 2.18e-01 2.39e-01 ph/cm2/s
Fluence Band 4.91e-07 6.55e-07 5.96e-07 9.46e-07 2.07e-06 2.69e-06 erg/cm2
Error -------- -------- 9.97e-08 -------- -------- 4.41e-07 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 2.070 0.168 - - 1.04e-03 1.13e-04 56.780 57
CPL 1.966 0.403 13.9 -1.0 1.19e-03 0.00e+00 56.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.130 0.668 - - 4.19e-03 1.86e-03 39.690 57
CPL 1.861 1.657 22.4 0.0 5.98e-03 0.00e+00 39.650 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: 152.320000 sec.
T50 in the 50-300 keV band: 98.624000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 201.816 8.004 209.820
T90 174.836 12.848 187.684
T50 89.260 43.004 132.264
Peak 1.000 61.344 62.344
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
148.2727 +35.6236 0.0129 37.6 4.2 2.3181 14.8 TRIG_00799669
------------------------------------------
Foreground time interval of the image:
8.004 88.401 (delta_t = 80.397 [sec])
Background time interval of the image:
-239.000 8.004 (delta_t = 247.004 [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 8.004 sec. to 209.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07003 ( -0.164404 0.171696 )
Norm@50keV : 1.03623E-03 ( -0.00011414 0.000111692 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 57 degrees of freedom
# Null hypothesis probability = 4.834058e-01
Photon flux (15-150 keV) in 201.8 sec: 0.160655 ( -0.0141016 0.0141124 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.93761e-06 ( -1.94371e-07 1.969e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.004 sec. to 209.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.96570 ( -0.728969 0.0762693 )
Epeak [keV] : 13.9094 ( -11.9526 -13.9094 )
Norm@50keV : 1.18986E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.69 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 56 degrees of freedom
# Null hypothesis probability = 4.489790e-01
Photon flux (15-150 keV) in 201.8 sec: 0.159927 ( -0.014707 0.014546 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.91721e-06 ( -2.29305e-07 2.13418e-07 ) ergs/cm2
Band function
Time interval is from 8.004 sec. to 209.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96052 ( -4.96052 -4.96052 )
beta : -2.13018 ( -0.220028 0.181302 )
Epeak [keV] : 19.7595 ( -19.7595 3.76116 )
Norm@50keV : 787.197 ( -68.0083 1.51125e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.57 using 59 PHA bins.
# Reduced chi-squared = 1.010 for 55 degrees of freedom
# Null hypothesis probability = 4.533225e-01
Photon flux (15-150 keV) in 201.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.06948e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.76255 (-1.04568 1.16144)
R^2/D10^2 : 7.91460E-02 (-0.0280716 0.0442043)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.90 using 59 PHA bins.
# Reduced chi-squared = 1.595 for 57 degrees of freedom
# Null hypothesis probability = 2.878198e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.073e-07 5.247e-08
25- 50 7.383e-07 7.739e-08
50-150 3.593e-07 8.798e-08
15-150 1.405e-06 1.524e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 61.5028 (-14.5187 21.5869)
Norm : 0.824217 (-0.121291 0.138821)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.85 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.077009e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.197e-07 5.106e-08
25- 50 6.435e-07 6.276e-08
50-150 7.473e-07 1.702e-07
15-150 1.810e-06 1.974e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.91262 (-1.24123 1.79165)
R1^2/D10^2 : 0.827689 (-0.555582 1.50973)
kT2 [keV] : 17.1381 (-3.84998 10.2064)
R2^2/D10^2 : 6.59686E-03 (-0.00552246 0.0126637)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.16 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.261379e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.578e-07 1.906e-07
25- 50 5.903e-07 1.856e-07
50-150 7.527e-07 3.886e-07
15-150 1.801e-06 7.025e-07
Peak spectrum fit
Power-law model
Time interval is from 61.344 sec. to 62.344 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13037 ( -0.582891 0.753318 )
Norm@50keV : 4.18775E-03 ( -0.00194121 0.00176889 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.69 using 59 PHA bins.
# Reduced chi-squared = 0.6963 for 57 degrees of freedom
# Null hypothesis probability = 9.606260e-01
Photon flux (15-150 keV) in 1 sec: 0.668893 ( -0.217706 0.217747 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.90312e-08 ( -1.50125e-08 1.57379e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 61.344 sec. to 62.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86084 ( -3.10613 0.208681 )
Epeak [keV] : 22.3724 ( )
Norm@50keV : 5.97727E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.65 using 59 PHA bins.
# Reduced chi-squared = 0.7080 for 56 degrees of freedom
# Null hypothesis probability = 9.518762e-01
Photon flux (15-150 keV) in 1 sec: 0.665069 ( -0.216761 0.219282 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.83926e-08 ( -1.53302e-08 1.62245e-08 ) ergs/cm2
Band function
Time interval is from 61.344 sec. to 62.344 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.90293 ( -1.46563 1.0721 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 20.6152 ( -17.1091 -20.6136 )
Norm@50keV : 5.54233E-03 ( -0.00180037 0.00532702 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.65 using 59 PHA bins.
# Reduced chi-squared = 0.7209 for 55 degrees of freedom
# Null hypothesis probability = 9.408463e-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] : 9.35829 (-3.59117 5.90391)
R^2/D10^2 : 0.395284 (-0.390001 2.21312)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.75 using 59 PHA bins.
# Reduced chi-squared = 0.7501 for 57 degrees of freedom
# Null hypothesis probability = 9.194211e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.868e-09 4.310e-09
25- 50 1.550e-08 9.740e-09
50-150 6.655e-09 5.050e-09
15-150 2.902e-08 1.892e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 58.6107 (-35.068 -58.6107)
Norm : 3.55158 (-1.51414 3.15786)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.80 using 59 PHA bins.
# Reduced chi-squared = 0.6982 for 57 degrees of freedom
# Null hypothesis probability = 9.595162e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.891e-09 5.516e-09
25- 50 1.343e-08 8.380e-09
50-150 1.499e-08 1.221e-08
15-150 3.732e-08 2.351e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.27586 (-4.28845 6.02124)
R1^2/D10^2 : 6.29055 (-5.95176 -6.16394)
kT2 [keV] : 16.6882 (-11.4591 -16.7346)
R2^2/D10^2 : 3.29810E-02 (-0.0323147 0.554812)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 39.64 using 59 PHA bins.
# Reduced chi-squared = 0.7207 for 55 degrees of freedom
# Null hypothesis probability = 9.410292e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.711e-09 5.705e-09
25- 50 1.160e-08 6.430e-09
50-150 1.626e-08 1.087e-08
15-150 3.757e-08 2.158e-08
Plot creation:
Sat Dec 23 18:08:36 EST 2017