batgrbproduct analysis for trigger=814129
batgrbproduct Analysis for Trigger=814129
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): Thu Mar 15 00:26:45 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger814129/GCN5_download_cron
======================================================================
Trigger: 00814129 Segment: 000
BAT Trigger Time: 542681032 [s; MET]
Trigger Stop: 542681112 [s; MET]
UTC: 2018-03-14T00:43:31.380160 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 99.2763679701429 Dec: -24.4913623818303 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 24.03
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 24.03
Flight Position: [ source = BAT ]
RA: 99.2763679701429 Dec: -24.4913623818303 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 99.2082934738553 Dec: -24.5299081511404 [deg; J2000]
{ 06h 36m 50.0s , -24d 31' 47.7" }
+/- 3.10105540177343 [arcmin] (estimated 90% radius based on SNR)
+/- 1.63090902565356 [arcmin] (formal 1-sigma fit error)
SNR: 6.03895669680274
Angular difference between Flight and Ground position is 4.377258 arcmin
Partial Coding Fraction: 0.2480469 [ including projection effects ]
Duration
T90: 51.2320001125336 +/- 22.2996266516377
Measured from: -9.78399991989136
to: 41.4480001926422 [s; relative to TRIGTIME]
T50: 10.7200000286102 +/- 0.622356809418835
Measured from: -1.57599985599518
to: 9.14400017261505 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.05200004577637
to: 4.05200004577637 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.7999999523163
to: 109.751999974251 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.623290 6.050423 5.042901 1.145069
0.150484 0.161926 0.143439 0.115543 [error]
Peak 0.164562 0.399911 0.324899 0.028739
0.018953 0.023835 0.021362 0.012194 [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 1.49e-06 2.73e-06 3.85e-06 1.14e-05 1.10e-05 1.95e-05 erg/cm2
Error 8.85e-08 9.77e-08 1.45e-07 9.42e-07 3.62e-07 1.03e-06 erg/cm2
Peak flux Power-law 2.65e+00 2.62e+00 1.81e+00 1.98e+00 7.86e+00 9.05e+00 ph/cm2/s
Error 2.98e-01 2.02e-01 1.53e-01 3.06e-01 5.87e-01 6.58e-01 ph/cm2/s
Fluence Cutoff-PL 1.28e-06 2.86e-06 4.08e-06 5.25e-06 1.06e-05 1.35e-05 erg/cm2
Error 1.10e-07 1.12e-07 1.71e-07 1.33e-06 3.90e-07 1.35e-06 erg/cm2
Peak flux Cutoff-PL 1.70e+00 3.25e+00 2.35e+00 4.54e-01 7.69e+00 7.75e+00 ph/cm2/s
Error 3.47e-01 2.76e-01 2.20e-01 1.71e-01 5.89e-01 6.08e-01 ph/cm2/s
Fluence Band 1.25e-06 2.88e-06 4.01e-06 7.66e-06 1.06e-05 1.58e-05 erg/cm2
Error 1.43e-07 -------- 2.84e-07 -------- 3.97e-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 1.503 0.055 - - 9.55e-03 3.00e-04 72.570 57
CPL 0.835 0.246 94.9 17.8 1.95e-02 5.10e-03 47.720 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.530 0.101 - - 6.25e-02 4.57e-03 96.580 57
CPL -0.829 0.663 62.6 5.3 9.03e-01 7.43e-01 40.180 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: 20.800000 sec.
T50 in the 50-300 keV band: 9.280000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 121.552 -11.800 109.752
T90 51.232 -9.784 41.448
T50 10.720 -1.576 9.144
Peak 1.000 3.052 4.052
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
99.2083 -24.5299 0.0319 42.3 35.8 17.4726 6.0 TRIG_00814129
------------------------------------------
Foreground time interval of the image:
-11.800 86.101 (delta_t = 97.901 [sec])
Background time interval of the image:
-12.499 -11.800 (delta_t = 0.699 [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 -11.800 sec. to 109.752 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50322 ( -0.0547058 0.0546889 )
Norm@50keV : 9.55048E-03 ( -0.000300238 0.000300233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.57 using 59 PHA bins.
# Reduced chi-squared = 1.273 for 57 degrees of freedom
# Null hypothesis probability = 8.005123e-02
Photon flux (15-150 keV) in 121.6 sec: 1.19331 ( -0.0410497 0.0411528 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10112e-05 ( -3.61474e-07 3.6186e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.800 sec. to 109.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.834537 ( -0.25251 0.239295 )
Epeak [keV] : 94.8514 ( -12.3825 23.1665 )
Norm@50keV : 1.95455E-02 ( -0.00431547 0.00589431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.72 using 59 PHA bins.
# Reduced chi-squared = 0.8522 for 56 degrees of freedom
# Null hypothesis probability = 7.765936e-01
Photon flux (15-150 keV) in 121.6 sec: 1.14755 ( -0.04353 0.04369 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06317e-05 ( -3.90956e-07 3.89631e-07 ) ergs/cm2
Band function
Time interval is from -11.800 sec. to 109.752 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.834295 ( -0.260295 1.84032 )
beta : -8.21351 ( 9.09355 19.0601 )
Epeak [keV] : 94.8609 ( -8.36629 22.8216 )
Norm@50keV : 1.95463E-02 ( -0.00412837 0.00274644 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.72 using 59 PHA bins.
# Reduced chi-squared = 0.8676 for 55 degrees of freedom
# Null hypothesis probability = 7.463203e-01
Photon flux (15-150 keV) in 121.6 sec: 1.14558 ( 5.85442 -0.04647 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.06138e-05 ( -1.06129e-05 -4.06302e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 16.5223 ( )
R^2/D10^2 : 9.66616E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 195.98 using 59 PHA bins.
# Reduced chi-squared = 3.4383 for 57 degrees of freedom
# Null hypothesis probability = 3.825839e-17
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.584e-07 4.183e-08
25- 50 2.846e-06 1.210e-07
50-150 5.495e-06 2.876e-07
15-150 9.000e-06 3.089e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-13.16 -200)
Norm : 4.92985 (-0.154583 0.154583)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.78 using 59 PHA bins.
# Reduced chi-squared = 1.049 for 57 degrees of freedom
# Null hypothesis probability = 3.752160e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.493e-06 5.350e-08
25- 50 2.872e-06 9.971e-08
50-150 6.299e-06 2.146e-07
15-150 1.066e-05 3.520e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.21550 (-1.03568 1.11928)
R1^2/D10^2 : 0.639558 (-0.200976 0.335067)
kT2 [keV] : 26.3549 (-2.83816 4.08281)
R2^2/D10^2 : 1.41324E-02 (-0.00602855 0.00810108)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.79 using 59 PHA bins.
# Reduced chi-squared = 0.8508 for 55 degrees of freedom
# Null hypothesis probability = 7.766186e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.169e-06 1.505e-07
25- 50 2.946e-06 2.432e-07
50-150 6.494e-06 7.874e-07
15-150 1.061e-05 9.807e-07
Peak spectrum fit
Power-law model
Time interval is from 3.052 sec. to 4.052 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53017 ( -0.100616 0.101744 )
Norm@50keV : 6.24658E-02 ( -0.00457689 0.00457204 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 96.58 using 59 PHA bins.
# Reduced chi-squared = 1.694 for 57 degrees of freedom
# Null hypothesis probability = 8.284275e-04
Photon flux (15-150 keV) in 1 sec: 7.86318 ( -0.586668 0.58724 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.89786e-07 ( -4.53098e-08 4.53931e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.052 sec. to 4.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.828970 ( -0.707165 0.618303 )
Epeak [keV] : 62.5755 ( -4.69648 5.93848 )
Norm@50keV : 0.902762 ( -0.443309 1.04281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.18 using 59 PHA bins.
# Reduced chi-squared = 0.7175 for 56 degrees of freedom
# Null hypothesis probability = 9.452084e-01
Photon flux (15-150 keV) in 1 sec: 7.69152 ( -0.58778 0.59057 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75008e-07 ( -4.5993e-08 4.6305e-08 ) ergs/cm2
Band function
Time interval is from 3.052 sec. to 4.052 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.866313 ( -0.552348 1.39796 )
beta : -4.13931 ( 9.77966 19.7795 )
Epeak [keV] : 62.1400 ( -6.39155 5.93019 )
Norm@50keV : 0.947126 ( -0.477592 2.16482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.01 using 59 PHA bins.
# Reduced chi-squared = 0.7274 for 55 degrees of freedom
# Null hypothesis probability = 9.357415e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 5.75647e-07 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.5304 (-0.950037 1.00845)
R^2/D10^2 : 0.931355 (-0.191924 0.237467)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.64 using 59 PHA bins.
# Reduced chi-squared = 0.7481 for 57 degrees of freedom
# Null hypothesis probability = 9.212702e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.674e-08 5.650e-09
25- 50 1.916e-07 1.830e-08
50-150 3.193e-07 3.615e-08
15-150 5.576e-07 4.415e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 188.066 (-47.5188 -188.104)
Norm : 33.2488 (-2.47775 2.62075)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 80.64 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 57 degrees of freedom
# Null hypothesis probability = 2.138270e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.341e-08 8.435e-09
25- 50 1.593e-07 2.760e-08
50-150 3.426e-07 1.450e-07
15-150 5.854e-07 1.857e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 8.38016 (-8.38514 -8.38514)
R1^2/D10^2 : 1.61235 (-1.61086 -1.61086)
kT2 [keV] : 17.2553 (-2.06127 -17.2588)
R2^2/D10^2 : 0.550043 (-0.549369 0.456423)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.25 using 59 PHA bins.
# Reduced chi-squared = 0.7317 for 55 degrees of freedom
# Null hypothesis probability = 9.321081e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.436e-08 2.953e-08
25- 50 1.888e-07 9.950e-08
50-150 3.298e-07 1.792e-07
15-150 5.730e-07 2.997e-07
Plot creation:
Thu Mar 15 00:34:01 EDT 2018