batgrbproduct analysis for trigger=912239
batgrbproduct Analysis for Trigger=912239
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): Tue Jul 2 17:06:19 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger912239/GCN5_download_cron
======================================================================
Trigger: 00912239 Segment: 000
BAT Trigger Time: 583631602.688 [s; MET]
Trigger Stop: 583631603.712 [s; MET]
UTC: 2019-06-30T23:52:59.523940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 293.908248688796 Dec: -32.7512118392696 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.75
Image Trigger?: NO
Rate S/N Ratio: 16.0934769394311 [ if not an image trigger ]
Image S/N Ratio: 9.75
Flight Position: [ source = BAT ]
RA: 293.908248688796 Dec: -32.7512118392696 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 293.890352283333 Dec: -32.7593041843985 [deg; J2000]
{ 19h 35m 33.7s , -32d 45' 33.5" }
+/- 1.10869190271374 [arcmin] (estimated 90% radius based on SNR)
+/- 0.340748320667936 [arcmin] (formal 1-sigma fit error)
SNR: 26.2484004615651
Angular difference between Flight and Ground position is 1.025297 arcmin
Partial Coding Fraction: 0.59375 [ including projection effects ]
Duration
T90: 357.5 +/- 48.6727915127113
Measured from: 0.100000143051147
to: 357.600000143051 [s; relative to TRIGTIME]
T50: 127.963999867439 +/- 70.9658157410561
Measured from: 7.18800020217896
to: 135.152000069618 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.120000004768372
to: 0.879999995231628 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.91999995708466
to: 407.111999988556 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.786106 1.893850 0.999682 0.292962
0.158053 0.155895 0.137736 0.131907 [error]
Peak 0.059837 0.075989 0.074562 0.025923
0.011244 0.011593 0.010972 0.009377 [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 5.40e-07 7.76e-07 8.30e-07 1.65e-06 2.66e-06 3.79e-06 erg/cm2
Error 7.46e-08 7.40e-08 1.34e-07 5.30e-07 3.07e-07 6.70e-07 erg/cm2
Peak flux Power-law 5.13e-01 5.80e-01 4.69e-01 6.33e-01 1.79e+00 2.19e+00 ph/cm2/s
Error 1.42e-01 9.82e-02 8.75e-02 2.49e-01 2.77e-01 3.52e-01 ph/cm2/s
Fluence Cutoff-PL 5.11e-07 8.43e-07 7.87e-07 4.82e-07 2.44e-06 2.62e-06 erg/cm2
Error 8.29e-08 1.06e-07 1.65e-07 1.10e-06 3.75e-07 1.23e-06 erg/cm2
Peak flux Cutoff-PL 4.92e-01 5.91e-01 4.79e-01 4.93e-01 1.78e+00 2.05e+00 ph/cm2/s
Error 1.68e-01 1.12e-01 1.00e-01 3.89e-01 2.87e-01 4.71e-01 ph/cm2/s
Fluence Band 4.96e-07 8.63e-07 7.53e-07 1.03e-06 2.50e-06 3.15e-06 erg/cm2
Error 8.56e-08 1.40e-07 1.58e-07 -------- 2.55e-07 -------- 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 1.904 0.179 - - 7.07e-04 8.26e-05 63.610 57
CPL 1.195 0.876 46.1 -16.0 1.84e-03 3.17e-03 61.270 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.305 0.268 - - 1.50e-02 2.30e-03 50.470 57
CPL 1.090 1.152 221.2 0.0 1.91e-02 3.16e-02 50.350 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: 11.584000 sec.
T50 in the 50-300 keV band: 5.568000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 409.032 -1.920 407.112
T90 357.500 0.100 357.600
T50 127.964 7.188 135.152
Peak 1.000 -0.120 0.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
293.8904 -32.7593 0.0073 23.2 136.1 2.7848 26.2 TRIG_00912239
------------------------------------------
Foreground time interval of the image:
-1.920 16.913 (delta_t = 18.833 [sec])
Background time interval of the image:
-239.688 -1.920 (delta_t = 237.768 [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 -1.920 sec. to 407.112 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90359 ( -0.175419 0.182236 )
Norm@50keV : 7.06691E-04 ( -8.33296e-05 8.18223e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.61 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 57 degrees of freedom
# Null hypothesis probability = 2.550311e-01
Photon flux (15-150 keV) in 409 sec: 0.101572 ( -0.00968434 0.00968676 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.65751e-06 ( -3.04179e-07 3.10653e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.920 sec. to 407.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19517 ( -0.980749 0.770691 )
Epeak [keV] : 46.1129 ( -14.1104 -46.1128 )
Norm@50keV : 1.83916E-03 ( -0.00116146 0.00517038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.27 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 56 degrees of freedom
# Null hypothesis probability = 2.926301e-01
Photon flux (15-150 keV) in 409 sec: 9.84950E-02 ( -0.0102314 0.010245 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.43652e-06 ( -3.60656e-07 3.90313e-07 ) ergs/cm2
Band function
Time interval is from -1.920 sec. to 407.112 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.511425 ( -1.25412 0.495078 )
beta : -2.27696 ( 2.27766 0.403276 )
Epeak [keV] : 36.9868 ( -14.733 24.3745 )
Norm@50keV : 5.40777E-03 ( -0.00593407 52.8091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.83 using 59 PHA bins.
# Reduced chi-squared = 1.088 for 55 degrees of freedom
# Null hypothesis probability = 3.047912e-01
Photon flux (15-150 keV) in 409 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 2.49755e-06 ( -2.49469e-06 -3.37499e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 9.95690 (-1.0529 1.20477)
R^2/D10^2 : 4.82623E-02 (-0.0171014 0.0259216)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.97 using 59 PHA bins.
# Reduced chi-squared = 1.333 for 57 degrees of freedom
# Null hypothesis probability = 4.727221e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.980e-07 6.505e-08
25- 50 9.834e-07 1.076e-07
50-150 5.069e-07 1.492e-07
15-150 1.888e-06 2.325e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 74.0665 (-20.3792 34.4045)
Norm : 0.489529 (-0.0703165 0.0858533)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.26 using 59 PHA bins.
# Reduced chi-squared = 1.075 for 57 degrees of freedom
# Null hypothesis probability = 3.259487e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.165e-07 7.158e-08
25- 50 8.341e-07 8.589e-08
50-150 1.116e-06 3.143e-07
15-150 2.467e-06 3.732e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.09594 (-2.12253 1.92059)
R1^2/D10^2 : 0.133965 (-0.0706635 0.268405)
kT2 [keV] : 24.2181 (-9.88031 110.662)
R2^2/D10^2 : 1.01035E-03 (-0.000970478 0.00777174)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.34 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 55 degrees of freedom
# Null hypothesis probability = 2.887364e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.922e-07 1.739e-07
25- 50 8.707e-07 3.238e-07
50-150 1.153e-06 6.152e-07
15-150 2.516e-06 9.937e-07
Peak spectrum fit
Power-law model
Time interval is from -0.120 sec. to 0.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.30476 ( -0.267913 0.268326 )
Norm@50keV : 1.50210E-02 ( -0.00230069 0.00229394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.47 using 59 PHA bins.
# Reduced chi-squared = 0.8854 for 57 degrees of freedom
# Null hypothesis probability = 7.169868e-01
Photon flux (15-150 keV) in 1 sec: 1.79362 ( -0.276623 0.277225 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48263e-07 ( -2.55052e-08 2.58567e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.120 sec. to 0.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08995 ( -1.26624 1.037 )
Epeak [keV] : 221.221 ( -221.226 -221.226 )
Norm@50keV : 1.91494E-02 ( -0.00630892 0.0569194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.35 using 59 PHA bins.
# Reduced chi-squared = 0.8991 for 56 degrees of freedom
# Null hypothesis probability = 6.877925e-01
Photon flux (15-150 keV) in 1 sec: 1.77803 ( -0.28805 0.28593 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.46185e-07 ( -2.7627e-08 2.7422e-08 ) ergs/cm2
Band function
Time interval is from -0.120 sec. to 0.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.11275 ( 0.916821 2.40853 )
beta : -1.33166 ( 1.51625 0.470179 )
Epeak [keV] : 22.6422 ( -148.082 -148.082 )
Norm@50keV : 490.932 ( -491.032 1222.41 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.19 using 59 PHA bins.
# Reduced chi-squared = 0.9126 for 55 degrees of freedom
# Null hypothesis probability = 6.584429e-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] : 17.2261 (-3.04788 3.877)
R^2/D10^2 : 0.133037 (-0.0658041 0.122642)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.41 using 59 PHA bins.
# Reduced chi-squared = 1.025 for 57 degrees of freedom
# Null hypothesis probability = 4.234226e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.010e-09 2.804e-09
25- 50 3.582e-08 9.350e-09
50-150 7.620e-08 2.471e-08
15-150 1.200e-07 3.203e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-63.4821 -200)
Norm : 7.37899 (-1.12946 1.12946)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.71 using 59 PHA bins.
# Reduced chi-squared = 0.9248 for 57 degrees of freedom
# Null hypothesis probability = 6.365354e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.838e-08 1.046e-08
25- 50 3.535e-08 1.965e-08
50-150 7.752e-08 4.398e-08
15-150 1.312e-07 7.355e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.29087 (-2.80967 9.29992)
R1^2/D10^2 : 3.84144 (-3.55662 18.7079)
kT2 [keV] : 22.9876 (-6.15425 -23.0776)
R2^2/D10^2 : 4.45361E-02 (-0.0429031 0.0564641)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.10 using 59 PHA bins.
# Reduced chi-squared = 0.9290 for 55 degrees of freedom
# Null hypothesis probability = 6.245153e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.592e-08 9.035e-09
25- 50 3.187e-08 1.632e-08
50-150 9.180e-08 5.386e-08
15-150 1.396e-07 7.355e-08
Plot creation:
Tue Jul 2 17:12:40 EDT 2019