batgrbproduct analysis for trigger=906654
batgrbproduct Analysis for Trigger=906654
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): Wed Jun 5 16:59:24 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger906654/GCN5_download_cron
======================================================================
Trigger: 00906654 Segment: 000
BAT Trigger Time: 581353058.816 [s; MET]
Trigger Stop: 581353059.84 [s; MET]
UTC: 2019-06-04T14:57:15.797140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.586711289614 Dec: -32.9325616929355 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.22
Image Trigger?: NO
Rate S/N Ratio: 15 [ if not an image trigger ]
Image S/N Ratio: 9.22
Flight Position: [ source = BAT ]
RA: 297.586711289614 Dec: -32.9325616929355 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.545136902244 Dec: -32.9751913340303 [deg; J2000]
{ 19h 50m 10.8s , -32d 58' 30.7" }
+/- 1.0065138191961 [arcmin] (estimated 90% radius based on SNR)
+/- 0.338614574008438 [arcmin] (formal 1-sigma fit error)
SNR: 30.1363171100636
Angular difference between Flight and Ground position is 3.305058 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 220.135999917984 +/- 4.735231816739
Measured from: -4.65999984741211
to: 215.476000070572 [s; relative to TRIGTIME]
T50: 132.219999909401 +/- 2.80710525974179
Measured from: 30.5640001296997
to: 162.784000039101 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 157.536000013351
to: 158.536000013351 [s; relative to TRIGTIME]
Total Fluence
Measured from: -39.7760000228882
to: 239.504000067711 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 9.735660 11.350293 7.473311 1.553702
0.172894 0.168135 0.146012 0.127369 [error]
Peak 0.261474 0.315395 0.233951 0.043573
0.013197 0.014414 0.012962 0.008780 [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 3.28e-06 4.99e-06 5.69e-06 1.24e-05 1.77e-05 2.63e-05 erg/cm2
Error 1.45e-07 1.24e-07 1.61e-07 8.06e-07 3.88e-07 8.84e-07 erg/cm2
Peak flux Power-law 2.71e+00 2.43e+00 1.50e+00 1.41e+00 7.25e+00 8.06e+00 ph/cm2/s
Error 2.40e-01 1.33e-01 1.06e-01 2.01e-01 3.90e-01 4.19e-01 ph/cm2/s
Fluence Cutoff-PL 3.14e-06 5.04e-06 5.76e-06 9.78e-06 1.74e-05 2.37e-05 erg/cm2
Error 1.96e-07 1.31e-07 1.75e-07 2.22e-06 4.56e-07 2.67e-06 erg/cm2
Peak flux Cutoff-PL 2.48e+00 2.52e+00 1.57e+00 9.18e-01 7.08e+00 7.49e+00 ph/cm2/s
Error 2.96e-01 1.52e-01 1.21e-01 3.34e-01 4.10e-01 5.46e-01 ph/cm2/s
Fluence Band 3.12e-06 5.01e-06 5.74e-06 1.03e-05 1.74e-05 2.43e-05 erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band 2.44e+00 2.52e+00 1.58e+00 9.06e-01 7.06e+00 7.45e+00 ph/cm2/s
Error 2.87e-01 -------- -------- 2.12e-01 3.97e-01 5.12e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.812 0.044 - - 6.89e-03 1.50e-04 42.040 57
CPL 1.632 0.178 110.3 428.5 8.34e-03 1.54e-03 38.940 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.695 0.093 - - 5.47e-02 3.00e-03 58.660 57
CPL 1.261 0.368 88.0 79.9 8.93e-02 3.79e-02 54.190 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: 195.136000 sec.
T50 in the 50-300 keV band: 140.736000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 279.280 -39.776 239.504
T90 220.136 -4.660 215.476
T50 132.220 30.564 162.784
Peak 1.000 157.536 158.536
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.5451 -32.9752 0.0064 33.4 176.2 6.6270 30.1 TRIG_00906654
------------------------------------------
Foreground time interval of the image:
-39.776 18.085 (delta_t = 57.861 [sec])
Background time interval of the image:
-239.816 -39.776 (delta_t = 200.040 [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
-39.776000 233.134000
234.184000 239.504000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81157 ( -0.0436918 0.0438349 )
Norm@50keV : 6.89438E-03 ( -0.000150142 0.00015009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.04 using 59 PHA bins.
# Reduced chi-squared = 0.7375 for 57 degrees of freedom
# Null hypothesis probability = 9.310038e-01
Photon flux (15-150 keV) in 278.2 sec: 0.954327 ( -0.0247406 0.024881 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.76506e-05 ( -3.87814e-07 3.87992e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-39.776000 233.134000
234.184000 239.504000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63184 ( -0.181004 0.174071 )
Epeak [keV] : 110.320 ( -30.131 826.878 )
Norm@50keV : 8.34104E-03 ( -0.00137192 0.00171654 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.94 using 59 PHA bins.
# Reduced chi-squared = 0.6954 for 56 degrees of freedom
# Null hypothesis probability = 9.597421e-01
Photon flux (15-150 keV) in 278.2 sec: 0.937166 ( -0.029206 0.029451 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74067e-05 ( -4.57277e-07 4.55135e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-39.776000 233.134000
234.184000 239.504000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.63211 ( -0.173551 0.154627 )
beta : -10.0000 ( 10 1.59872e-14 )
Epeak [keV] : 110.360 ( -22.1233 848.585 )
Norm@50keV : 8.33729E-03 ( -0.00136981 0.0017218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 38.94 using 59 PHA bins.
# Reduced chi-squared = 0.7081 for 55 degrees of freedom
# Null hypothesis probability = 9.501879e-01
Photon flux (15-150 keV) in 278.2 sec: 0.938746 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.74009e-05 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.5655 ( )
R^2/D10^2 : 0.103284 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 488.32 using 59 PHA bins.
# Reduced chi-squared = 8.5671 for 57 degrees of freedom
# Null hypothesis probability = 8.239153e-70
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.282e-06 6.023e-08
25- 50 4.955e-06 1.502e-07
50-150 7.058e-06 2.865e-07
15-150 1.330e-05 3.005e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 117.631 (-9.47563 14.1229)
Norm : 3.94346 (-0.148288 0.129892)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.40 using 59 PHA bins.
# Reduced chi-squared = 0.8492 for 57 degrees of freedom
# Null hypothesis probability = 7.841381e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.771e-06 1.497e-07
25- 50 4.995e-06 2.017e-07
50-150 9.107e-06 1.942e-06
15-150 1.687e-05 2.036e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.66047 (-0.560851 0.595006)
R1^2/D10^2 : 1.28494 (-0.350667 0.525718)
kT2 [keV] : 23.7606 (-1.71116 2.10096)
R2^2/D10^2 : 1.33597E-02 (-0.00376714 0.0046247)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.51 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.553756e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.786e-06 2.157e-07
25- 50 5.061e-06 2.226e-07
50-150 9.115e-06 4.521e-07
15-150 1.696e-05 6.858e-07
Peak spectrum fit
Power-law model
Time interval is from 157.536 sec. to 158.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.69457 ( -0.0922822 0.0939953 )
Norm@50keV : 5.46638E-02 ( -0.00300273 0.00298731 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.66 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 57 degrees of freedom
# Null hypothesis probability = 4.144031e-01
Photon flux (15-150 keV) in 1 sec: 7.24628 ( -0.390036 0.390573 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.06341e-07 ( -2.91314e-08 2.92534e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 157.536 sec. to 158.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.26078 ( -0.382264 0.354156 )
Epeak [keV] : 88.0447 ( -20.4336 139.41 )
Norm@50keV : 8.93343E-02 ( -0.0288494 0.0470392 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.19 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 56 degrees of freedom
# Null hypothesis probability = 5.437061e-01
Photon flux (15-150 keV) in 1 sec: 7.08348 ( -0.40935 0.4105 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.94619e-07 ( -3.0995e-08 3.0972e-08 ) ergs/cm2
Band function
Time interval is from 157.536 sec. to 158.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.26103 ( -0.388198 0.274685 )
beta : -10.0000 ( 10 20 )
Epeak [keV] : 88.0775 ( -20.4949 139.356 )
Norm@50keV : 8.92866E-02 ( -0.0287997 0.0470788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.19 using 59 PHA bins.
# Reduced chi-squared = 0.9853 for 55 degrees of freedom
# Null hypothesis probability = 5.055761e-01
Photon flux (15-150 keV) in 1 sec: 7.05849 ( -0.05849 -0.36525 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.95615e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 14.2484 ( )
R^2/D10^2 : 0.944252 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 138.38 using 59 PHA bins.
# Reduced chi-squared = 2.4277 for 57 degrees of freedom
# Null hypothesis probability = 1.017972e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.042e-08 4.085e-09
25- 50 1.530e-07 1.030e-08
50-150 2.063e-07 2.115e-08
15-150 3.997e-07 2.470e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 148.662 (-32.8967 41.589)
Norm : 29.5431 (-1.78091 2.17767)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.54 using 59 PHA bins.
# Reduced chi-squared = 0.9569 for 57 degrees of freedom
# Null hypothesis probability = 5.678635e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.593e-08 6.150e-09
25- 50 1.406e-07 1.370e-08
50-150 2.764e-07 9.165e-08
15-150 4.929e-07 1.007e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.74640 (-1.1173 1.28421)
R1^2/D10^2 : 15.4463 (-8.08951 21.9411)
kT2 [keV] : 21.7199 (-2.59814 3.51344)
R2^2/D10^2 : 0.168602 (-0.075315 0.11033)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.29 using 59 PHA bins.
# Reduced chi-squared = 0.9689 for 55 degrees of freedom
# Null hypothesis probability = 5.403228e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.833e-08 2.150e-08
25- 50 1.353e-07 1.765e-08
50-150 2.781e-07 4.575e-08
15-150 4.917e-07 7.860e-08
Plot creation:
Wed Jun 5 17:04:43 EDT 2019