batgrbproduct analysis for trigger=846299
batgrbproduct Analysis for Trigger=846299
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 Jul 6 20:39:32 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger846299/GCN5_download_cron
======================================================================
Trigger: 00846299 Segment: 000
BAT Trigger Time: 552498096 [s; MET]
Trigger Stop: 552498168 [s; MET]
UTC: 2018-07-05T15:41:14.784440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.594468636216 Dec: -11.6304515042116 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.79
Flight Position: [ source = BAT ]
RA: 212.594468636216 Dec: -11.6304515042116 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 212.6045473945 Dec: -11.6399417809055 [deg; J2000]
{ 14h 10m 25.1s , -11d 38' 23.8" }
+/- 2.14818004538397 [arcmin] (estimated 90% radius based on SNR)
+/- 1.09816253094139 [arcmin] (formal 1-sigma fit error)
SNR: 10.2030895186234
Angular difference between Flight and Ground position is 0.821617 arcmin
Partial Coding Fraction: 0.3632812 [ including projection effects ]
Duration
T90: 123.171999931335 +/- 16.5482582583304
Measured from: 3.86400008201599
to: 127.036000013351 [s; relative to TRIGTIME]
T50: 61.9199999570847 +/- 25.356123485809
Measured from: 27.0200001001358
to: 88.9400000572205 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.59599995613098
to: 4.59599995613098 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.259999990463257
to: 133.695999979973 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.795243 1.077688 1.025370 0.104023
0.142134 0.137146 0.116310 0.097774 [error]
Peak 0.032339 0.024656 0.033872 0.015100
0.012486 0.011946 0.011537 0.009669 [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 3.15e-07 5.34e-07 6.89e-07 1.80e-06 2.03e-06 3.33e-06 erg/cm2
Error 6.94e-08 7.25e-08 1.11e-07 6.18e-07 2.73e-07 7.00e-07 erg/cm2
Peak flux Power-law 2.23e-01 2.41e-01 1.86e-01 2.34e-01 7.37e-01 8.83e-01 ph/cm2/s
Error 1.75e-01 1.79e-01 9.01e-02 2.82e-01 3.27e-01 3.72e-01 ph/cm2/s
Fluence Cutoff-PL 2.82e-07 5.63e-07 7.23e-07 8.78e-07 1.97e-06 2.45e-06 erg/cm2
Error 8.41e-08 8.64e-08 1.27e-07 1.05e-06 2.90e-07 1.02e-06 erg/cm2
Peak flux Cutoff-PL 1.96e-01 2.49e-01 1.96e-01 1.44e-01 7.18e-01 7.85e-01 ph/cm2/s
Error 1.55e-01 1.34e-01 1.07e-01 2.88e-01 3.38e-01 4.24e-01 ph/cm2/s
Fluence Band 2.80e-07 5.60e-07 7.21e-07 8.89e-07 1.97e-06 2.45e-06 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.00e-01 2.46e-01 1.95e-01 1.64e-01 7.22e-01 8.06e-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 1.631 0.218 - - 1.63e-03 2.10e-04 58.830 57
CPL 1.058 0.880 85.6 -17.4 3.11e-03 4.14e-03 57.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.378 0.788 - - 6.08e-03 2.55e-03 56.230 57
CPL 0.856 5.771 120.6 0.0 1.06e-02 2.26e-01 56.110 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: 6.144000 sec.
T50 in the 50-300 keV band: 2.560000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 133.436 0.260 133.696
T90 123.172 3.864 127.036
T50 61.920 27.020 88.940
Peak 1.000 3.596 4.596
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
212.6045 -11.6399 0.0189 47.5 -3.3 3.3780 10.2 TRIG_00846299
------------------------------------------
Foreground time interval of the image:
0.260 133.696 (delta_t = 133.436 [sec])
Background time interval of the image:
-239.000 -112.560 (delta_t = 126.440 [sec])
-111.000 0.260 (delta_t = 111.260 [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 0.260 sec. to 133.696 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63115 ( -0.216668 0.219402 )
Norm@50keV : 1.63395E-03 ( -0.000209899 0.000209144 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.83 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 57 degrees of freedom
# Null hypothesis probability = 4.081339e-01
Photon flux (15-150 keV) in 133.4 sec: 0.212046 ( -0.0285249 0.0286972 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03119e-06 ( -2.71761e-07 2.73262e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 133.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.05794 ( -1.03596 0.724626 )
Epeak [keV] : 85.5772 ( -50.8368 -85.5772 )
Norm@50keV : 3.11234E-03 ( -0.00176559 0.00651896 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.55 using 59 PHA bins.
# Reduced chi-squared = 1.028 for 56 degrees of freedom
# Null hypothesis probability = 4.176045e-01
Photon flux (15-150 keV) in 133.4 sec: 0.206108 ( -0.029895 0.030023 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97149e-06 ( -2.89905e-07 2.89211e-07 ) ergs/cm2
Band function
Time interval is from 0.260 sec. to 133.696 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.05267 ( -0.604751 0.91418 )
beta : -9.35629 ( 9.36913 19.3691 )
Epeak [keV] : 87.0326 ( -86.9665 -86.9665 )
Norm@50keV : 3.09345E-03 ( -0.00134606 0.00285335 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.56 using 59 PHA bins.
# Reduced chi-squared = 1.046 for 55 degrees of freedom
# Null hypothesis probability = 3.807922e-01
Photon flux (15-150 keV) in 133.4 sec: 0.205764 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97124e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.2044 (-2.17049 2.55936)
R^2/D10^2 : 2.23408E-02 (-0.00969092 0.0168092)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.39 using 59 PHA bins.
# Reduced chi-squared = 1.217 for 57 degrees of freedom
# Null hypothesis probability = 1.256732e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.439e-07 4.063e-08
25- 50 5.789e-07 1.103e-07
50-150 9.163e-07 2.158e-07
15-150 1.639e-06 2.837e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 164.781 (-67.8063 -164.781)
Norm : 0.871013 (-0.122168 0.150509)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.71 using 59 PHA bins.
# Reduced chi-squared = 1.012 for 57 degrees of freedom
# Null hypothesis probability = 4.488452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.958e-07 1.653e-07
25- 50 5.556e-07 2.939e-07
50-150 1.139e-06 6.560e-07
15-150 1.990e-06 1.103e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.25584 (-2.48671 3.83593)
R1^2/D10^2 : 0.309588 (-0.254195 0.826682)
kT2 [keV] : 21.9625 (-5.22929 15.4196)
R2^2/D10^2 : 4.80317E-03 (-0.00417934 0.0093816)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.38 using 59 PHA bins.
# Reduced chi-squared = 1.043 for 55 degrees of freedom
# Null hypothesis probability = 3.869905e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.847e-07 1.620e-07
25- 50 5.505e-07 2.863e-07
50-150 1.117e-06 6.143e-07
15-150 1.952e-06 9.905e-07
Peak spectrum fit
Power-law model
Time interval is from 3.596 sec. to 4.596 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37762 ( -0.796004 0.779361 )
Norm@50keV : 6.08479E-03 ( -0.00254829 0.00254736 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.23 using 59 PHA bins.
# Reduced chi-squared = 0.9864 for 57 degrees of freedom
# Null hypothesis probability = 5.040419e-01
Photon flux (15-150 keV) in 1 sec: 0.737339 ( -0.323713 0.331044 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.90708e-08 ( -2.60401e-08 2.66408e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.596 sec. to 4.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.855640 ( -5.0293 6.51306 )
Epeak [keV] : 120.602 ( -120.625 -120.625 )
Norm@50keV : 1.06221E-02 ( -0.0106201 0.441221 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.11 using 59 PHA bins.
# Reduced chi-squared = 1.002 for 56 degrees of freedom
# Null hypothesis probability = 4.708119e-01
Photon flux (15-150 keV) in 1 sec: 0.718161 ( -0.334028 0.342019 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75837e-08 ( -2.74962e-08 2.75775e-08 ) ergs/cm2
Band function
Time interval is from 3.596 sec. to 4.596 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.97652 ( -8.72045 -4.97652 )
beta : -1.49060 ( -1.95682 0.848519 )
Epeak [keV] : 26.7978 ( -26.7978 52.6474 )
Norm@50keV : 373.039 ( -154.377 6.35935e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.87 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 55 degrees of freedom
# Null hypothesis probability = 4.420218e-01
Photon flux (15-150 keV) in 1 sec: 0.722456 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35402e-08 ( -2.35332e-08 -2.35402e-08 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.9761 (-7.98029 17.0276)
R^2/D10^2 : 4.60039E-02 (-0.0457948 0.300982)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.18 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.684615e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.978e-09 2.012e-09
25- 50 1.376e-08 8.895e-09
50-150 3.226e-08 2.175e-08
15-150 4.899e-08 3.190e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.363 -199.363)
Norm : 3.09083 (-1.2986 1.62355)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.33 using 59 PHA bins.
# Reduced chi-squared = 0.9882 for 57 degrees of freedom
# Null hypothesis probability = 5.002667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.696e-09 5.100e-09
25- 50 1.480e-08 9.515e-09
50-150 3.247e-08 1.987e-08
15-150 5.497e-08 3.606e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.16591 (-6.16591 -6.16591)
R1^2/D10^2 : 1.06975 (-1.06975 -1.06975)
kT2 [keV] : 25.7634 (-25.7634 -25.7634)
R2^2/D10^2 : 1.16843E-02 (-0.0116843 0.184563)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.94 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Null hypothesis probability = 4.391980e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.940e-09 5.420e-09
25- 50 1.357e-08 7.435e-09
50-150 3.800e-08 2.456e-08
15-150 5.851e-08 3.113e-08
Plot creation:
Fri Jul 6 20:43:53 EDT 2018