batgrbproduct Analysis for Trigger=690738
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Mon Jun 13 15:47:35 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger690738/GCN5_download_cron
======================================================================
Trigger: 00690738 Segment: 000
BAT Trigger Time: 487441488 [s; MET]
Trigger Stop: 487441552 [s; MET]
UTC: 2016-06-12T16:24:31.593800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.086032320401 Dec: -15.585862654991 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 9.83
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.83
Flight Position: [ source = BAT ]
RA: 245.086032320401 Dec: -15.585862654991 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.980617202047 Dec: -15.6359463753334 [deg; J2000]
{ 16h 19m 55.3s , -15d 38' 09.4" }
+/- 0.769293852450832 [arcmin] (estimated 90% radius based on SNR)
+/- 0.256555448860597 [arcmin] (formal 1-sigma fit error)
SNR: 44.2429136555041
Angular difference between Flight and Ground position is 6.792469 arcmin
Partial Coding Fraction: 0.8046875 [ including projection effects ]
Duration
T90: 600.955999970436 +/- 46.3032199673105
Measured from: -24.6279999017715
to: 576.328000068665 [s; relative to TRIGTIME]
T50: 312.523999929428 +/- 19.0335493615841
Measured from: 63.1800001263618
to: 375.70400005579 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -48.1759999990463
to: -47.1759999990463 [s; relative to TRIGTIME]
Total Fluence
Measured from: -49.6320000290871
to: 771.152000010014 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 42.679796 4.589340 0.418465 -0.354597
0.261934 0.230985 0.202166 0.203367 [error]
Peak 0.046712 0.023184 0.018057 0.026419
0.015811 0.014893 0.013417 0.013873 [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 1.43e-05 1.91e-06 1.12e-07 6.99e-09 1.63e-05 1.63e-05 erg/cm2
Error 1.05e-06 1.38e-07 2.28e-08 2.48e-09 1.03e-06 1.03e-06 erg/cm2
Peak flux Power-law 4.67e-01 2.11e-01 5.73e-02 1.93e-02 7.47e-01 7.55e-01 ph/cm2/s
Error 2.37e-01 1.72e-01 8.20e-02 6.82e-02 3.48e-01 3.59e-01 ph/cm2/s
Fluence Cutoff-PL 1.33e-05 1.64e-06 5.97e-09 6.67e-14 1.49e-05 1.49e-05 erg/cm2
Error 1.25e-06 1.63e-07 8.93e-09 2.49e-12 1.26e-06 1.26e-06 erg/cm2
Peak flux Cutoff-PL 4.77e-01 1.99e-01 4.97e-02 1.52e-02 7.36e-01 7.46e-01 ph/cm2/s
Error -------- -------- -------- -------- -------- -------- 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 6.085 0.204 - - 1.49e-04 2.41e-05 88.390 57
CPL 1.000 0.000 50.0 0.0 1.88e-03 0.00e+00 951.900 56
The chi2 of BB fit is 68.59 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.880 1.815 - - 2.96e-03 3.24e-03 57.410 57
CPL 1.974 0.000 1.0 0.0 1.14e-02 0.00e+00 57.820 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 820.784 -49.632 771.152
T90 600.956 -24.628 576.328
T50 312.524 63.180 375.704
Peak 1.000 -48.176 -47.176
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.9806 -15.6359 0.0043 15.5 69.7 6.2347 44.2 TRIG_00690738
------------------------------------------
Foreground time interval of the image:
-14.799 71.701 (delta_t = 86.500 [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
Multiple GTIs in the spectrum
tstart tstop
-49.632000 463.570000
465.000000 771.152000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.08512 ( -0.204868 0.203581 )
Norm@50keV : 1.48743E-04 ( -2.25804e-05 2.57165e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.39 using 59 PHA bins.
# Reduced chi-squared = 1.551 for 57 degrees of freedom
# Null hypothesis probability = 4.844280e-03
Photon flux (15-150 keV) in 819.4 sec: 0.666853 ( -0.04619 0.046922 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.63432e-05 ( -1.02314e-06 1.03772e-06 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-49.632000 463.570000
465.000000 771.152000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.87574E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 951.90 using 59 PHA bins.
# Reduced chi-squared = 16.998 for 56 degrees of freedom
# Null hypothesis probability = 3.793112e-163
Photon flux (15-150 keV) in 819.4 sec: 0.604671 ( -0.057113 0.056187 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49053e-05 ( -1.26843e-06 1.24598e-06 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-49.632000 463.570000
465.000000 771.152000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.77923 ( 4.60954 8.77923 )
beta : -6.10065 ( -0.193765 0.215515 )
Epeak [keV] : 272.212 ( -272.212 -272.212 )
Norm@50keV : 1.99544E-02 ( -0.00295614 0.00361212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.41 using 59 PHA bins.
# Reduced chi-squared = 1.607 for 55 degrees of freedom
# Null hypothesis probability = 2.859815e-03
Photon flux (15-150 keV) in 819.4 sec: 0.606362 ( ) 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] : 2.86570 (-0.113345 0.122442)
R^2/D10^2 : 109.516 (-32.0853 44.6592)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.59 using 59 PHA bins.
# Reduced chi-squared = 1.203 for 57 degrees of freedom
# Null hypothesis probability = 1.398009e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.255e-05 1.135e-06
25- 50 1.555e-06 1.393e-07
50-150 1.711e-09 6.076e-10
15-150 1.411e-05 1.327e-06
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.96800 (-0.279269 0.310351)
Norm : 145.359 (-35.588 46.5893)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.67 using 59 PHA bins.
# Reduced chi-squared = 1.152 for 57 degrees of freedom
# Null hypothesis probability = 2.017103e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.344e-05 1.270e-06
25- 50 1.675e-06 1.377e-07
50-150 8.403e-09 2.904e-09
15-150 1.513e-05 1.131e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.80172 (-1.6433 0.132717)
R1^2/D10^2 : 129.371 (-40.8423 183.944)
kT2 [keV] : 15.3729 (-14.4214 31.8101)
R2^2/D10^2 : 1.08517E-03 (-0.00102413 0.105286)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.69 using 59 PHA bins.
# Reduced chi-squared = 1.158 for 55 degrees of freedom
# Null hypothesis probability = 1.973066e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.284e-05 1.340e-06
25- 50 1.638e-06 2.102e-07
50-150 2.907e-07 2.329e-07
15-150 1.477e-05 1.725e-06
Peak spectrum fit
Power-law model
Time interval is from -48.176 sec. to -47.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.88038 ( -1.13994 2.48934 )
Norm@50keV : 2.95904E-03 ( -0.00295819 0.00352413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.41 using 59 PHA bins.
# Reduced chi-squared = 1.007 for 57 degrees of freedom
# Null hypothesis probability = 4.599532e-01
Photon flux (15-150 keV) in 1 sec: 0.746992 ( -0.349506 0.346448 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.37311e-08 ( -2.04515e-08 2.62299e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -48.176 sec. to -47.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97377 ( )
Epeak [keV] : 1.00576 ( )
Norm@50keV : 1.13549E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.82 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 56 degrees of freedom
# Null hypothesis probability = 4.076987e-01
Photon flux (15-150 keV) in 1 sec: 0.735965 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30047e-08 ( -1.97361e-08 2.69595e-08 ) ergs/cm2
Band function
Time interval is from -48.176 sec. to -47.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.83754 ( 8.83754 8.83754 )
beta : -2.88089 ( -2.48568 1.13943 )
Epeak [keV] : 16.1121 ( -16.1121 -16.1121 )
Norm@50keV : 0.402009 ( -0.402053 0.478986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.41 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 55 degrees of freedom
# Null hypothesis probability = 3.860255e-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] : 5.05355 (-2.97865 4.07585)
R^2/D10^2 : 5.64765 (-5.64014 851.91)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.98 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 57 degrees of freedom
# Null hypothesis probability = 4.029113e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.433e-08 9.090e-09
25- 50 9.608e-09 7.055e-09
50-150 4.112e-10 4.958e-10
15-150 2.435e-08 1.513e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 18.6363 (-18.8129 120.466)
Norm : 9.58162 (-9.42875 156.822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.13 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.335476e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.396e-08 8.755e-09
25- 50 1.156e-08 8.350e-09
50-150 3.067e-09 3.660e-09
15-150 2.859e-08 1.909e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.28818 (-3.24315 4.10456)
R1^2/D10^2 : 39.0646 (-44.8979 -44.8979)
kT2 [keV] : 17.6427 (-17.3115 -17.3115)
R2^2/D10^2 : 2.36464E-02 (-0.0262099 44.7928)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.30 using 59 PHA bins.
# Reduced chi-squared = 1.042 for 55 degrees of freedom
# Null hypothesis probability = 3.899978e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.411e-08 8.260e-09
25- 50 9.263e-09 5.190e-09
50-150 1.519e-08 1.298e-08
15-150 3.856e-08 2.409e-08
Plot creation:
Mon Jun 13 15:55:22 EDT 2016