batgrbproduct analysis for trigger=809217
batgrbproduct Analysis for Trigger=809217
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): Fri Feb 9 18:52:25 EST 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger809217/GCN5_download_cron
======================================================================
Trigger: 00809217 Segment: 000
BAT Trigger Time: 539823560 [s; MET]
Trigger Stop: 539823880 [s; MET]
UTC: 2018-02-08T22:58:59.552340 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 20.7863154928897 Dec: 7.44382135341108 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.46
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.46
Flight Position: [ source = BAT ]
RA: 20.7863154928897 Dec: 7.44382135341108 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 20.8173962484637 Dec: 7.44124385282069 [deg; J2000]
{ 01h 23m 16.2s , +07d 26' 28.5" }
+/- 3.70187226947336 [arcmin] (estimated 90% radius based on SNR)
+/- 2.00815510431641 [arcmin] (formal 1-sigma fit error)
SNR: 4.68908133820469
Angular difference between Flight and Ground position is 1.855590 arcmin
Partial Coding Fraction: 0.8359375 [ including projection effects ]
Duration
T90: 0.115999937057495 +/- 0.0432665872684419
Measured from: 28.3040001392365
to: 28.4200000762939 [s; relative to TRIGTIME]
T50: 0.0559999942779541 +/- 0.0432665872684419
Measured from: 28.3280000686646
to: 28.3840000629425 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 27.8660000562668
to: 28.8660000562668 [s; relative to TRIGTIME]
Total Fluence
Measured from: 28.3040000200272
to: 28.4240000247955 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.005907 0.005234 0.006918 0.002362
0.002228 0.002181 0.002100 0.001895 [error]
Peak 0.017613 0.000063 0.007927 0.010641
0.005990 0.006326 0.005861 0.005355 [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-09 2.53e-09 4.71e-09 2.11e-08 1.28e-08 2.94e-08 erg/cm2
Error 7.15e-10 1.01e-09 1.80e-09 2.04e-08 4.62e-09 2.12e-08 erg/cm2
Peak flux Power-law 1.44e-01 1.59e-02 7.39e-04 3.58e-05 1.61e-01 1.61e-01 ph/cm2/s
Error 1.18e-01 4.62e-02 2.06e-02 1.52e-02 1.32e-01 1.33e-01 ph/cm2/s
Fluence Cutoff-PL 1.07e-09 2.54e-09 4.74e-09 1.95e-08 1.28e-08 2.77e-08 erg/cm2
Error 8.19e-10 1.08e-09 1.97e-09 1.92e-08 4.78e-09 2.31e-08 erg/cm2
Peak flux Cutoff-PL 1.44e-01 1.62e-02 7.70e-04 3.80e-05 1.61e-01 1.61e-01 ph/cm2/s
Error 1.18e-01 4.62e-02 2.06e-02 1.50e-02 1.08e-01 1.20e-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 1.103 0.636 - - 1.02e-02 3.36e-03 32.990 57
CPL 1.098 1.014 9994.5 0.0 1.03e-02 8.11e-02 32.990 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.431 -0.959 - - 6.86e-05 8.41e-04 66.500 57
CPL 1.452 0.000 35.1 0.0 3.07e-03 0.00e+00 69.600 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 0.120 28.304 28.424
T90 0.116 28.304 28.420
T50 0.056 28.328 28.384
Peak 1.000 27.866 28.866
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
20.8174 +7.4412 0.0412 18.4 51.3 0.0196 4.7 TRIG_00809217
------------------------------------------
Foreground time interval of the image:
28.304 28.424 (delta_t = 0.120 [sec])
Background time interval of the image:
-11.399 28.304 (delta_t = 39.703 [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 28.304 sec. to 28.424 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.10349 ( -0.666443 0.606212 )
Norm@50keV : 1.02023E-02 ( -0.00337762 0.00335179 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.99 using 59 PHA bins.
# Reduced chi-squared = 0.5787 for 57 degrees of freedom
# Null hypothesis probability = 9.954893e-01
Photon flux (15-150 keV) in 0.12 sec: 1.18383 ( -0.400585 0.404043 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27859e-08 ( -4.56476e-09 4.68242e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.304 sec. to 28.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09841 ( -2.93077 -0.902685 )
Epeak [keV] : 9994.47 ( -9993.25 -9993.25 )
Norm@50keV : 1.02573E-02 ( -0.00335707 0.158775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.99 using 59 PHA bins.
# Reduced chi-squared = 0.5891 for 56 degrees of freedom
# Null hypothesis probability = 9.939338e-01
Photon flux (15-150 keV) in 0.12 sec: 1.18396 ( -0.412755 0.4026 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27506e-08 ( -4.85116e-09 4.70496e-09 ) ergs/cm2
Band function
Time interval is from 28.304 sec. to 28.424 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.99206 ( 0.822465 1.99203 )
beta : -1.09662 ( -0.606793 0.665594 )
Epeak [keV] : 9992.39 ( -9999.32 -9999.32 )
Norm@50keV : 1.02041E-02 ( 1.64499 -0.0102021 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.99 using 59 PHA bins.
# Reduced chi-squared = 0.5998 for 55 degrees of freedom
# Null hypothesis probability = 9.919035e-01
Photon flux (15-150 keV) in 0.12 sec: 1.17422 ( ) 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] : 22.3815 (-8.51791 17.611)
R^2/D10^2 : 3.83315E-02 (-0.0382213 0.139537)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.97 using 59 PHA bins.
# Reduced chi-squared = 0.6134 for 57 degrees of freedom
# Null hypothesis probability = 9.905588e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.230e-10 2.735e-10
25- 50 2.260e-09 1.392e-09
50-150 8.459e-09 5.649e-09
15-150 1.114e-08 7.044e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 (-114.87 -199.363)
Norm : 4.89468 (-1.65381 1.65387)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 34.57 using 59 PHA bins.
# Reduced chi-squared = 0.6065 for 57 degrees of freedom
# Null hypothesis probability = 9.917953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.463e-09 9.096e-10
25- 50 2.814e-09 1.741e-09
50-150 6.171e-09 3.805e-09
15-150 1.045e-08 6.432e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.83776 (-5.79598 18.8507)
R1^2/D10^2 : 1.99296 (-1.99812 8.14576)
kT2 [keV] : 31.0313 (-30.9377 -30.9377)
R2^2/D10^2 : 1.25050E-02 (-0.0125276 0.0707911)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 32.35 using 59 PHA bins.
# Reduced chi-squared = 0.5883 for 55 degrees of freedom
# Null hypothesis probability = 9.936230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.261e-09 8.826e-10
25- 50 2.361e-09 1.348e-09
50-150 9.365e-09 5.773e-09
15-150 1.299e-08 7.122e-09
Peak spectrum fit
Power-law model
Time interval is from 27.866 sec. to 28.866 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.43074 ( -3.51325 -5.43074 )
Norm@50keV : 6.86446E-05 ( -6.86446e-05 0.00161433 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.824211e-01
Photon flux (15-150 keV) in 1 sec: 0.160632 ( -0.115347 0.148498 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.98345e-09 ( -4.98345e-09 1.07189e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 27.866 sec. to 28.866 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45160 ( )
Epeak [keV] : 35.0878 ( )
Norm@50keV : 3.07482E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.60 using 59 PHA bins.
# Reduced chi-squared = 1.243 for 56 degrees of freedom
# Null hypothesis probability = 1.046483e-01
Photon flux (15-150 keV) in 1 sec: 0.161168 ( -0.124076 0.09215 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.02043e-09 ( -5.02043e-09 1.06601e-08 ) ergs/cm2
Band function
Time interval is from 27.866 sec. to 28.866 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.91606 ( 9.91606 9.91606 )
beta : -5.58261 ( 5.57263 3.65899 )
Epeak [keV] : 4.99120 ( -4.9912 -4.9912 )
Norm@50keV : 7.83794E-03 ( -0.00801433 0.220781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.50 using 59 PHA bins.
# Reduced chi-squared = 1.209 for 55 degrees of freedom
# Null hypothesis probability = 1.376400e-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] : 2.42749 (-1.34629 2.06845)
R^2/D10^2 : 98.8253 (-109.858 300672)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.28 using 59 PHA bins.
# Reduced chi-squared = 1.163 for 57 degrees of freedom
# Null hypothesis probability = 1.872493e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.365e-09 2.601e-09
25- 50 2.845e-10 2.029e-10
50-150 6.707e-14 1.449e-13
15-150 4.650e-09 2.749e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.28556 (-4.28793 17.9732)
Norm : 65.4789 (-65.3247 114083)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.39 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.848246e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.217e-09 2.572e-09
25- 50 3.679e-10 2.421e-10
50-150 8.242e-13 1.091e-12
15-150 4.586e-09 2.746e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.27953 (-1.45852 1.90484)
R1^2/D10^2 : 147.652 (-142.217 1.1016e+06)
kT2 [keV] : 32.5807 (-32.5432 -32.5432)
R2^2/D10^2 : 1.23574E-03 (-0.00123956 -0.00123956)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.68 using 59 PHA bins.
# Reduced chi-squared = 1.176 for 55 degrees of freedom
# Null hypothesis probability = 1.744691e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.225e-09 2.376e-09
25- 50 1.442e-09 1.084e-09
50-150 8.969e-09 7.790e-09
15-150 1.464e-08 9.215e-09
Plot creation:
Fri Feb 9 18:57:52 EST 2018