batgrbproduct analysis for trigger=832119
batgrbproduct Analysis for Trigger=832119
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): Sun May 13 09:29:23 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger832119/GCN5_download_cron
======================================================================
Trigger: 00832119 Segment: 000
BAT Trigger Time: 547855328 [s; MET]
Trigger Stop: 547855448 [s; MET]
UTC: 2018-05-12T22:01:47.066860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 201.953361498894 Dec: 21.4063155534925 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.5
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.5
Flight Position: [ source = BAT ]
RA: 201.953361498894 Dec: 21.4063155534925 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 201.939697780445 Dec: 21.4043608630045 [deg; J2000]
{ 13h 27m 45.5s , +21d 24' 15.7" }
+/- 1.92726268410446 [arcmin] (estimated 90% radius based on SNR)
+/- 0.847809164373933 [arcmin] (formal 1-sigma fit error)
SNR: 11.9140641281156
Angular difference between Flight and Ground position is 0.772231 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 24 +/- 7.07106781186548
Measured from: 30.0000001192093
to: 54.0000001192093 [s; relative to TRIGTIME]
T50: 9 +/- 3.60555127546399
Measured from: 37.0000001192093
to: 46.0000001192093 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 39
to: 40 [s; relative to TRIGTIME]
Total Fluence
Measured from: 29
to: 55 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.293626 0.354047 0.123740 0.066859
0.039228 0.040506 0.035347 0.031570 [error]
Peak 0.038000 0.018998 0.016557 -0.003145
0.008550 0.007937 0.006863 0.006269 [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 1.03e-07 1.31e-07 1.22e-07 2.01e-07 4.24e-07 5.58e-07 erg/cm2
Error 1.93e-08 1.92e-08 3.24e-08 1.03e-07 7.49e-08 1.42e-07 erg/cm2
Peak flux Power-law 2.41e-01 1.94e-01 1.06e-01 8.40e-02 5.79e-01 6.25e-01 ph/cm2/s
Error 1.08e-01 6.48e-02 5.20e-02 9.23e-02 1.93e-01 2.11e-01 ph/cm2/s
Fluence Cutoff-PL 1.00e-07 1.43e-07 1.09e-07 4.81e-08 3.85e-07 4.01e-07 erg/cm2
Error 2.04e-08 2.90e-08 5.06e-08 1.13e-07 9.69e-08 1.92e-07 erg/cm2
Peak flux Cutoff-PL 1.92e-01 3.01e-01 4.50e-02 1.36e-04 5.38e-01 5.38e-01 ph/cm2/s
Error 1.21e-01 8.08e-02 6.60e-02 1.51e-02 1.82e-01 1.82e-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 2.101 0.273 - - 1.76e-03 3.40e-04 54.840 57
CPL 1.368 1.499 31.7 0.0 5.07e-03 0.00e+00 53.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.878 0.555 - - 4.07e-03 1.60e-03 67.750 57
CPL -3.820 0.572 34.9 12.6 1.82e+01 1.55e+05 63.500 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 26.000 29.000 55.000
T90 24.000 30.000 54.000
T50 9.000 37.000 46.000
Peak 1.000 39.000 40.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
201.9397 +21.4044 0.0161 34.1 10.3 0.9425 11.9 TRIG_00832119
------------------------------------------
Foreground time interval of the image:
29.000 55.000 (delta_t = 26.000 [sec])
Background time interval of the image:
-239.000 -237.640 (delta_t = 1.360 [sec])
-237.000 29.000 (delta_t = 266.000 [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 29.000 sec. to 55.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10057 ( -0.261671 0.283869 )
Norm@50keV : 1.75697E-03 ( -0.000344553 0.000335473 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.84 using 59 PHA bins.
# Reduced chi-squared = 0.9620 for 57 degrees of freedom
# Null hypothesis probability = 5.567131e-01
Photon flux (15-150 keV) in 26 sec: 0.276494 ( -0.0389791 0.0389791 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.2445e-07 ( -7.35184e-08 7.61901e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 29.000 sec. to 55.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.36807 ( -2.28976 0.707466 )
Epeak [keV] : 31.6622 ( )
Norm@50keV : 5.06814E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.97 using 59 PHA bins.
# Reduced chi-squared = 0.9638 for 56 degrees of freedom
# Null hypothesis probability = 5.520814e-01
Photon flux (15-150 keV) in 26 sec: 0.269863 ( -0.04098 0.040816 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.85107e-07 ( -9.18242e-08 1.02037e-07 ) ergs/cm2
Band function
Time interval is from 29.000 sec. to 55.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.72985 ( -2.27163 -0.397209 )
beta : -2.56430 ( -1.6312 0.517284 )
Epeak [keV] : 27.4270 ( -10.5227 10.695 )
Norm@50keV : 0.901729 ( -0.879342 133.193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.25 using 59 PHA bins.
# Reduced chi-squared = 0.9319 for 55 degrees of freedom
# Null hypothesis probability = 6.185876e-01
Photon flux (15-150 keV) in 26 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] : 8.11676 (-1.15958 1.38265)
R^2/D10^2 : 0.291825 (-0.136021 0.248401)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.08 using 59 PHA bins.
# Reduced chi-squared = 1.019 for 57 degrees of freedom
# Null hypothesis probability = 4.354469e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.135e-08 2.224e-08
25- 50 1.639e-07 3.563e-08
50-150 4.514e-08 2.069e-08
15-150 3.004e-07 7.055e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.0875 (-16.5936 31.6634)
Norm : 1.57346 (-0.357619 0.503703)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.91 using 59 PHA bins.
# Reduced chi-squared = 0.9458 for 57 degrees of freedom
# Null hypothesis probability = 5.916151e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.001e-07 1.764e-08
25- 50 1.438e-07 2.549e-08
50-150 1.399e-07 5.933e-08
15-150 3.837e-07 8.593e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.86076 (-1.53789 1.55644)
R1^2/D10^2 : 0.505607 (-0.24304 0.429972)
kT2 [keV] : 35.7665 (-27.6634 -43.8944)
R2^2/D10^2 : 5.84027E-04 (-0.000338219 0.009918)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.92 using 59 PHA bins.
# Reduced chi-squared = 0.9077 for 55 degrees of freedom
# Null hypothesis probability = 6.684348e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.000e-07 4.406e-08
25- 50 1.460e-07 6.926e-08
50-150 1.672e-07 9.357e-08
15-150 4.132e-07 1.874e-07
Peak spectrum fit
Power-law model
Time interval is from 39.000 sec. to 40.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87836 ( -0.524295 0.585757 )
Norm@50keV : 4.06799E-03 ( -0.00162252 0.00157834 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.75 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.560414e-01
Photon flux (15-150 keV) in 1 sec: 0.578519 ( -0.193205 0.193273 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.73841e-08 ( -1.41884e-08 1.50724e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 39.000 sec. to 40.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -3.81963 ( 2.82249 3.96597 )
Epeak [keV] : 34.9219 ( -7.66399 17.4785 )
Norm@50keV : 18.1950 ( -16.8862 310335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.50 using 59 PHA bins.
# Reduced chi-squared = 1.134 for 56 degrees of freedom
# Null hypothesis probability = 2.290168e-01
Photon flux (15-150 keV) in 1 sec: 0.537945 ( -0.17916 0.184772 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.71906e-08 ( -9.466e-09 1.27481e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.35346 (-2.27732 3.18705)
R^2/D10^2 : 0.395529 (-0.395529 0.749442)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.94 using 59 PHA bins.
# Reduced chi-squared = 1.122 for 57 degrees of freedom
# Null hypothesis probability = 2.459115e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.864e-09 4.096e-09
25- 50 1.548e-08 9.545e-09
50-150 6.635e-09 5.175e-09
15-150 2.898e-08 1.844e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.3473 (-18.9672 69.3852)
Norm : 5.80561 (-3.37051 40.8675)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 79.62 using 59 PHA bins.
# Reduced chi-squared = 1.397 for 57 degrees of freedom
# Null hypothesis probability = 2.556559e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.073e-08 6.516e-09
25- 50 1.109e-08 6.935e-09
50-150 4.813e-09 4.201e-09
15-150 2.663e-08 1.665e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.10372 (-1.27637 1.71692)
R1^2/D10^2 : 48.3946 (-43.8899 1573.11)
kT2 [keV] : 16.6498 (-7.74641 21.8546)
R2^2/D10^2 : 2.61247E-02 (-0.0243921 0.126037)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 55 degrees of freedom
# Null hypothesis probability = 3.434279e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.262e-08 6.830e-09
25- 50 8.278e-09 4.983e-09
50-150 1.269e-08 8.505e-09
15-150 3.359e-08 1.801e-08
Plot creation:
Sun May 13 09:38:01 EDT 2018