batgrbproduct analysis for trigger=814259
batgrbproduct Analysis for Trigger=814259
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): Thu Mar 15 21:28:46 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger814259/GCN5_download_cron
======================================================================
Trigger: 00814259 Segment: 000
BAT Trigger Time: 542747512 [s; MET]
Trigger Stop: 542747576 [s; MET]
UTC: 2018-03-14T19:11:31.376140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.089270979342 Dec: 7.18088078146362 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 14.47
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 14.47
Flight Position: [ source = BAT ]
RA: 275.089270979342 Dec: 7.18088078146362 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.140962974864 Dec: 7.21525148550732 [deg; J2000]
{ 18h 20m 33.8s , +07d 12' 54.9" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 1.74425654071277 [arcmin] (formal 1-sigma fit error)
SNR: -7.01920240763034
Angular difference between Flight and Ground position is 3.704220 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 1035.58399999142 +/- 517.284443132238
Measured from: -122.359999895096
to: 913.224000096321 [s; relative to TRIGTIME]
T50: 1035.58399999142 +/- 1033.38630794233
Measured from: -122.359999895096
to: 913.224000096321 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 318.94000005722
to: 319.94000005722 [s; relative to TRIGTIME]
Total Fluence
Measured from: -122.360000014305
to: 913.223999977112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 11.307782 15.729050 11.715128 2.284292
0.257996 0.244755 0.206459 0.172987 [error]
Peak 0.038401 0.051539 0.029470 0.008845
0.007438 0.007307 0.006108 0.004921 [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 4.15e-06 6.90e-06 8.71e-06 2.19e-05 2.59e-05 4.17e-05 erg/cm2
Error 1.81e-07 1.74e-07 2.23e-07 1.29e-06 5.57e-07 1.39e-06 erg/cm2
Peak flux Power-law 4.02e-01 3.74e-01 2.42e-01 2.41e-01 1.12e+00 1.26e+00 ph/cm2/s
Error 1.10e-01 6.34e-02 5.02e-02 1.03e-01 1.84e-01 2.00e-01 ph/cm2/s
Fluence Cutoff-PL 3.66e-06 7.05e-06 9.07e-06 1.28e-05 2.51e-05 3.25e-05 erg/cm2
Error 2.40e-07 1.87e-07 2.59e-07 2.32e-06 6.21e-07 2.40e-06 erg/cm2
Peak flux Cutoff-PL 4.03e-01 3.75e-01 2.42e-01 2.38e-01 1.12e+00 1.26e+00 ph/cm2/s
Error 1.15e-01 6.64e-02 5.10e-02 1.50e-01 1.84e-01 2.01e-01 ph/cm2/s
Fluence Band 3.63e-06 7.02e-06 9.05e-06 1.28e-05 2.51e-05 3.26e-05 erg/cm2
Error 1.68e-07 -------- -------- -------- 6.08e-07 -------- erg/cm2
Peak flux Band 3.18e-01 3.22e-01 2.03e-01 1.31e-01 9.14e-01 9.75e-01 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 1.664 0.040 - - 2.70e-03 5.72e-05 54.820 57
CPL 1.187 0.175 95.5 17.2 4.40e-03 7.78e-04 31.030 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.630 0.284 - - 8.62e-03 1.42e-03 45.180 57
CPL 1.636 0.391 9999.4 -0.0 8.61e-03 0.00e+00 45.180 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: 77.888000 sec.
T50 in the 50-300 keV band: 44.800000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 1035.580 -122.360 913.224
T90 1035.580 -122.360 913.224
T50 1035.580 -122.360 913.224
Peak 1.000 318.940 319.940
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.1410 +7.2153 0.0272 37.2 -171.5 -5.9561 -7.0 TRIG_00814259
------------------------------------------
Foreground time interval of the image:
-122.360 73.801 (delta_t = 196.161 [sec])
Background time interval of the image:
-142.299 -122.360 (delta_t = 19.939 [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
-122.360000 270.140000
271.000000 588.510000
590.000000 913.224000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66441 ( -0.0402995 0.0403322 )
Norm@50keV : 2.69867E-03 ( -5.72346e-05 5.72346e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.82 using 59 PHA bins.
# Reduced chi-squared = 0.9617 for 57 degrees of freedom
# Null hypothesis probability = 5.573517e-01
Photon flux (15-150 keV) in 1033 sec: 0.354073 ( -0.00892157 0.0089626 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58906e-05 ( -5.56812e-07 5.56998e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-122.360000 270.140000
271.000000 588.510000
590.000000 913.224000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18656 ( -0.178666 0.172182 )
Epeak [keV] : 95.4669 ( -11.8392 22.5729 )
Norm@50keV : 4.40372E-03 ( -0.000695762 0.000859698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.03 using 59 PHA bins.
# Reduced chi-squared = 0.5542 for 56 degrees of freedom
# Null hypothesis probability = 9.972671e-01
Photon flux (15-150 keV) in 1033 sec: 0.339081 ( -0.010101 0.010179 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51281e-05 ( -6.2135e-07 6.20007e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-122.360000 270.140000
271.000000 588.510000
590.000000 913.224000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.18655 ( -0.174749 0.16842 )
beta : -10.0000 ( 10 0 )
Epeak [keV] : 95.4504 ( -11.8289 22.5707 )
Norm@50keV : 4.40328E-03 ( -0.000695703 0.00086006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.03 using 59 PHA bins.
# Reduced chi-squared = 0.5643 for 55 degrees of freedom
# Null hypothesis probability = 9.962480e-01
Photon flux (15-150 keV) in 1033 sec: 0.340893 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51104e-05 ( -2.51031e-05 -6.22176e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.2796 ( )
R^2/D10^2 : 2.75659E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 402.45 using 59 PHA bins.
# Reduced chi-squared = 7.0605 for 57 degrees of freedom
# Null hypothesis probability = 1.844367e-53
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.554e-06 7.179e-08
25- 50 6.637e-06 2.071e-07
50-150 1.237e-05 4.494e-07
15-150 2.056e-05 4.494e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 165.725 (-16.6913 20.1489)
Norm : 1.42514 (-0.0395713 0.0415585)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.95 using 59 PHA bins.
# Reduced chi-squared = 0.5605 for 57 degrees of freedom
# Null hypothesis probability = 9.970593e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.731e-06 1.823e-07
25- 50 7.019e-06 3.419e-07
50-150 1.445e-05 3.095e-06
15-150 2.520e-05 3.238e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.89393 (-0.598283 0.643448)
R1^2/D10^2 : 0.366159 (-0.100458 0.149456)
kT2 [keV] : 23.7979 (-1.42265 1.71269)
R2^2/D10^2 : 5.65496E-03 (-0.0013686 0.00158858)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 31.44 using 59 PHA bins.
# Reduced chi-squared = 0.5717 for 55 degrees of freedom
# Null hypothesis probability = 9.955574e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.431e-06 2.949e-07
25- 50 7.037e-06 2.991e-07
50-150 1.435e-05 6.921e-07
15-150 2.482e-05 9.504e-07
Peak spectrum fit
Power-law model
Time interval is from 318.940 sec. to 319.940 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.62986 ( -0.281451 0.286576 )
Norm@50keV : 8.61653E-03 ( -0.00142632 0.00140851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.18 using 59 PHA bins.
# Reduced chi-squared = 0.7926 for 57 degrees of freedom
# Null hypothesis probability = 8.708996e-01
Photon flux (15-150 keV) in 1 sec: 1.11775 ( -0.183712 0.184412 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.03061e-08 ( -1.39675e-08 1.41121e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 318.940 sec. to 319.940 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63592 ( -0.500361 0.282571 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 8.60571E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.18 using 59 PHA bins.
# Reduced chi-squared = 0.8069 for 56 degrees of freedom
# Null hypothesis probability = 8.490305e-01
Photon flux (15-150 keV) in 1 sec: 1.11812 ( -0.184147 0.18346 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.0084e-08 ( -1.40672e-08 1.4198e-08 ) ergs/cm2
Band function
Time interval is from 318.940 sec. to 319.940 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.96824 ( -4.96824 -4.96824 )
beta : -1.69484 ( -0.336242 0.30794 )
Epeak [keV] : 22.4383 ( -22.4383 8.45653 )
Norm@50keV : 1913.49 ( -301.858 6.81261e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.66 using 59 PHA bins.
# Reduced chi-squared = 0.8121 for 55 degrees of freedom
# Null hypothesis probability = 8.390089e-01
Photon flux (15-150 keV) in 1 sec: 0.914061 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 6.46671e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.5546 (-2.46529 3.37475)
R^2/D10^2 : 0.228809 (-0.133106 0.284075)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.37 using 59 PHA bins.
# Reduced chi-squared = 1.024 for 57 degrees of freedom
# Null hypothesis probability = 4.249038e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.647e-09 2.441e-09
25- 50 2.535e-08 6.865e-09
50-150 2.473e-08 9.365e-09
15-150 5.773e-08 1.525e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 173.445 (-89.302 -172.818)
Norm : 4.53972 (-0.764336 1.03811)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.83 using 59 PHA bins.
# Reduced chi-squared = 0.8040 for 57 degrees of freedom
# Null hypothesis probability = 8.555076e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.133e-08 6.445e-09
25- 50 2.160e-08 1.163e-08
50-150 4.620e-08 2.556e-08
15-150 7.912e-08 4.274e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.32647 (-2.41074 2.66409)
R1^2/D10^2 : 0.834022 (-0.458693 1.52259)
kT2 [keV] : 48.6670 (-32.917 -58.5766)
R2^2/D10^2 : 1.73001E-03 (-0.00108073 0.011834)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.37 using 59 PHA bins.
# Reduced chi-squared = 0.7886 for 55 degrees of freedom
# Null hypothesis probability = 8.714190e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.121e-08 6.554e-09
25- 50 2.343e-08 1.314e-08
50-150 4.506e-08 2.609e-08
15-150 7.970e-08 3.878e-08
Plot creation:
Thu Mar 15 21:36:03 EDT 2018