batgrbproduct analysis for trigger=911609
batgrbproduct Analysis for Trigger=911609
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 Jun 28 17:49:19 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger911609/GCN5_download_cron
======================================================================
Trigger: 00911609 Segment: 000
BAT Trigger Time: 583327134.272 [s; MET]
Trigger Stop: 583327136.32 [s; MET]
UTC: 2019-06-27T11:18:31.127400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.830211321885 Dec: -5.29214903648591 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.64
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 7.64
Flight Position: [ source = BAT ]
RA: 244.830211321885 Dec: -5.29214903648591 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 244.842875811019 Dec: -5.30239162623938 [deg; J2000]
{ 16h 19m 22.3s , -05d 18' 08.6" }
+/- 2.71816356801274 [arcmin] (estimated 90% radius based on SNR)
+/- 1.22662010451541 [arcmin] (formal 1-sigma fit error)
SNR: 7.28995225430999
Angular difference between Flight and Ground position is 0.974761 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 1.60000002384186 +/- 0.284871976186096
Measured from: 0.104000210762024
to: 1.70400023460388 [s; relative to TRIGTIME]
T50: 1.02400004863739 +/- 0.317590980914842
Measured from: 0.360000133514404
to: 1.38400018215179 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.78000009059906
to: 1.78000009059906 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.0400000810623169
to: 1.78400003910065 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.086944 0.083315 0.027948 -0.017240
0.014434 0.013238 0.011008 0.008614 [error]
Peak 0.053906 0.047613 0.017428 -0.014853
0.011066 0.009924 0.008497 0.006386 [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 2.98e-08 3.22e-08 2.48e-08 3.13e-08 9.87e-08 1.18e-07 erg/cm2
Error 6.95e-09 6.51e-09 9.55e-09 2.30e-08 2.25e-08 3.63e-08 erg/cm2
Peak flux Power-law 6.09e-01 3.49e-01 1.26e-01 6.02e-02 1.12e+00 1.14e+00 ph/cm2/s
Error 1.76e-01 8.77e-02 6.01e-02 5.27e-02 2.58e-01 2.66e-01 ph/cm2/s
Fluence Cutoff-PL 2.83e-08 3.63e-08 2.15e-08 5.45e-09 9.03e-08 9.14e-08 erg/cm2
Error 7.68e-09 9.17e-09 1.20e-08 2.86e-08 2.37e-08 3.90e-08 erg/cm2
Peak flux Cutoff-PL 5.55e-01 4.09e-01 1.10e-01 9.24e-03 1.08e+00 1.08e+00 ph/cm2/s
Error 1.99e-01 1.24e-01 7.33e-02 5.08e-02 2.60e-01 2.62e-01 ph/cm2/s
Fluence Band 2.49e-08 2.49e-08 1.30e-08 9.77e-09 6.75e-08 7.28e-08 erg/cm2
Error 5.94e-09 -------- -------- -------- -------- -------- 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 2.376 0.385 - - 5.83e-03 1.65e-03 42.040 57
CPL 1.309 1.520 24.0 17.9 2.68e-02 4.18e-01 40.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.466 0.489 - - 5.80e-03 2.13e-03 42.230 57
CPL 0.961 2.069 25.8 0.0 4.93e-02 0.00e+00 40.780 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 1.744 0.040 1.784
T90 1.600 0.104 1.704
T50 1.024 0.360 1.384
Peak 1.000 0.780 1.780
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
244.8429 -5.3024 0.0264 28.2 -48.2 0.1738 7.3 TRIG_00911609
------------------------------------------
Foreground time interval of the image:
0.040 1.784 (delta_t = 1.744 [sec])
Background time interval of the image:
-239.272 0.040 (delta_t = 239.312 [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 0.040 sec. to 1.784 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.37623 ( -0.356135 0.413127 )
Norm@50keV : 5.83004E-03 ( -0.00167637 0.00163131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.04 using 59 PHA bins.
# Reduced chi-squared = 0.7375 for 57 degrees of freedom
# Null hypothesis probability = 9.309358e-01
Photon flux (15-150 keV) in 1.744 sec: 1.06388 ( -0.196198 0.196199 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.86595e-08 ( -2.19592e-08 2.30081e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.040 sec. to 1.784 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30864 ( -2.34414 0.696705 )
Epeak [keV] : 24.0330 ( -19.8156 16.0116 )
Norm@50keV : 2.67920E-02 ( -0.0267942 0.808266 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7300 for 56 degrees of freedom
# Null hypothesis probability = 9.354781e-01
Photon flux (15-150 keV) in 1.744 sec: 1.03507 ( -0.199337 0.20083 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02839e-08 ( -2.13964e-08 2.6029e-08 ) ergs/cm2
Band function
Time interval is from 0.040 sec. to 1.784 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.31593 ( 1.49696 1.49696 )
beta : -10.00000 ( 10 20 )
Epeak [keV] : 23.9855 ( -8.55032 16.0475 )
Norm@50keV : 2.64688E-02 ( -0.0264688 0.810218 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7433 for 55 degrees of freedom
# Null hypothesis probability = 9.218477e-01
Photon flux (15-150 keV) in 1.744 sec: 0.808046 ( 6.19195 -0.155014 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.74904e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 8.17009 (-1.60854 1.87591)
R^2/D10^2 : 1.07557 (-0.608879 1.54103)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.77 using 59 PHA bins.
# Reduced chi-squared = 0.7855 for 57 degrees of freedom
# Null hypothesis probability = 8.801363e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.299e-08 8.456e-09
25- 50 4.172e-08 1.432e-08
50-150 1.173e-08 6.548e-09
15-150 7.644e-08 2.367e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 37.4683 (-13.5046 25.1973)
Norm : 7.23368 (-2.19442 3.51822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.89 using 59 PHA bins.
# Reduced chi-squared = 0.7173 for 57 degrees of freedom
# Null hypothesis probability = 9.469953e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.831e-08 7.586e-09
25- 50 3.617e-08 1.136e-08
50-150 2.601e-08 1.412e-08
15-150 9.049e-08 2.571e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.43734 (-2.6557 3.63854)
R1^2/D10^2 : 23.0035 (-21.5032 4.68482e+07)
kT2 [keV] : 10.8240 (-2.95891 12.9319)
R2^2/D10^2 : 0.278041 (-0.272402 0.900015)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.37 using 59 PHA bins.
# Reduced chi-squared = 0.7341 for 55 degrees of freedom
# Null hypothesis probability = 9.300987e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.848e-08 1.533e-08
25- 50 3.657e-08 1.974e-08
50-150 2.143e-08 1.357e-08
15-150 8.648e-08 4.398e-08
Peak spectrum fit
Power-law model
Time interval is from 0.780 sec. to 1.780 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46593 ( -0.437986 0.540544 )
Norm@50keV : 5.80180E-03 ( -0.00215407 0.00210325 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.23 using 59 PHA bins.
# Reduced chi-squared = 0.7408 for 57 degrees of freedom
# Null hypothesis probability = 9.280166e-01
Photon flux (15-150 keV) in 1 sec: 1.11637 ( -0.257552 0.257557 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75002e-08 ( -1.58921e-08 1.68113e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.780 sec. to 1.780 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.961058 ( -3.10061 1.03686 )
Epeak [keV] : 25.7592 ( )
Norm@50keV : 4.93457E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.78 using 59 PHA bins.
# Reduced chi-squared = 0.7282 for 56 degrees of freedom
# Null hypothesis probability = 9.369717e-01
Photon flux (15-150 keV) in 1 sec: 1.08238 ( -0.258754 0.26032 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.25117e-08 ( -1.4443e-08 1.75106e-08 ) ergs/cm2
Band function
Time interval is from 0.780 sec. to 1.780 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.959616 ( 1.37805 1.37805 )
beta : -10.00000 ( 10 1.99251e-07 )
Epeak [keV] : 25.7547 ( -9.14215 15.1218 )
Norm@50keV : 4.94673E-02 ( -0.0112521 4.65056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.78 using 59 PHA bins.
# Reduced chi-squared = 0.7414 for 55 degrees of freedom
# Null hypothesis probability = 9.235737e-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] : 8.15302 (-1.93486 2.31264)
R^2/D10^2 : 1.14980 (-0.732248 2.3149)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.80 using 59 PHA bins.
# Reduced chi-squared = 0.7509 for 57 degrees of freedom
# Null hypothesis probability = 9.186278e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.401e-08 7.485e-09
25- 50 2.534e-08 1.211e-08
50-150 7.078e-09 4.610e-09
15-150 4.643e-08 2.509e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.6230 (-14.1501 28.238)
Norm : 8.09071 (-2.92425 5.26063)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.86 using 59 PHA bins.
# Reduced chi-squared = 0.7169 for 57 degrees of freedom
# Null hypothesis probability = 9.473458e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.760e-08 6.008e-09
25- 50 2.166e-08 7.862e-09
50-150 1.420e-08 9.777e-09
15-150 5.346e-08 2.333e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.88097 (-2.48422 5.35646)
R1^2/D10^2 : 58.8267 (-58.7091 -58.8851)
kT2 [keV] : 10.0854 (-2.78779 8.40612)
R2^2/D10^2 : 0.414971 (-0.415113 0.802285)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.03 using 59 PHA bins.
# Reduced chi-squared = 0.7278 for 55 degrees of freedom
# Null hypothesis probability = 9.354214e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.714e-08 8.300e-09
25- 50 2.277e-08 1.319e-08
50-150 1.160e-08 7.735e-09
15-150 5.151e-08 2.719e-08
Plot creation:
Fri Jun 28 17:55:13 EDT 2019