batgrbproduct analysis for trigger=886266
batgrbproduct Analysis for Trigger=886266
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 Jan 29 16:03:18 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger886266/GCN5_download_cron
======================================================================
Trigger: 00886266 Segment: 000
BAT Trigger Time: 570376472 [s; MET]
Trigger Stop: 570376560 [s; MET]
UTC: 2019-01-28T13:54:09.675680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 207.044837738202 Dec: -63.2653848182754 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 25.53
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 25.53
Flight Position: [ source = BAT ]
RA: 207.044837738202 Dec: -63.2653848182754 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 207.045247629028 Dec: -63.2680327180202 [deg; J2000]
{ 13h 48m 10.9s , -63d 16' 04.9" }
+/- 0.612264601316149 [arcmin] (estimated 90% radius based on SNR)
+/- 0.193491554602822 [arcmin] (formal 1-sigma fit error)
SNR: 61.3043118000177
Angular difference between Flight and Ground position is 0.159259 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 283.399999976158 +/- 4.68848127495012
Measured from: -76.4999998807907
to: 206.900000095367 [s; relative to TRIGTIME]
T50: 156.927999973297 +/- 3.5211815863461
Measured from: -11.8719998598099
to: 145.056000113487 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 204.944000005722
to: 205.944000005722 [s; relative to TRIGTIME]
Total Fluence
Measured from: -94.2560000419617
to: 225.77999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 13.084392 15.816540 8.409155 1.256197
0.173666 0.172060 0.145395 0.129950 [error]
Peak 0.040841 0.110503 0.035296 0.025844
0.013307 0.013012 0.010901 0.010318 [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 4.42e-06 6.17e-06 6.37e-06 1.20e-05 2.08e-05 2.90e-05 erg/cm2
Error 1.67e-07 1.32e-07 1.64e-07 6.96e-07 4.02e-07 7.91e-07 erg/cm2
Peak flux Power-law 5.05e-01 4.99e-01 3.46e-01 3.79e-01 1.50e+00 1.73e+00 ph/cm2/s
Error 1.57e-01 9.96e-02 8.68e-02 1.91e-01 2.90e-01 3.39e-01 ph/cm2/s
Fluence Cutoff-PL 3.90e-06 6.37e-06 6.51e-06 5.89e-06 1.98e-05 2.27e-05 erg/cm2
Error 2.17e-07 1.47e-07 1.77e-07 1.14e-06 4.92e-07 1.27e-06 erg/cm2
Peak flux Cutoff-PL 4.27e-01 5.87e-01 3.39e-01 6.80e-02 1.41e+00 1.42e+00 ph/cm2/s
Error 2.02e-01 2.04e-01 1.50e-01 2.20e-01 3.28e-01 4.22e-01 ph/cm2/s
Fluence Band 3.67e-06 6.46e-06 6.31e-06 9.21e-06 1.98e-05 2.57e-05 erg/cm2
Error 2.65e-07 1.73e-07 1.93e-07 1.30e-06 4.75e-07 1.32e-06 erg/cm2
Peak flux Band 5.64e-01 5.36e-01 3.23e-01 2.09e-01 1.53e+00 1.63e+00 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 1.954 0.038 - - 7.12e-03 1.39e-04 90.910 57
CPL 1.379 0.176 54.8 4.3 1.35e-02 2.60e-03 55.570 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.529 0.325 - - 1.19e-02 2.39e-03 90.630 57
CPL 0.063 3.892 56.8 -19.6 7.95e-02 1.80e+02 88.730 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 320.036 -94.256 225.780
T90 283.400 -76.500 206.900
T50 156.928 -11.872 145.056
Peak 1.000 204.944 205.944
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
207.0452 -63.2680 0.0031 3.4 104.4 14.1038 61.3 TRIG_00886266
------------------------------------------
Foreground time interval of the image:
-18.499 35.590 (delta_t = 54.089 [sec])
37.000 98.101 (delta_t = 61.101 [sec])
Background time interval of the image:
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
-94.256000 -56.479300
-55.000000 35.590000
37.000000 225.780000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95433 ( -0.0382937 0.0383873 )
Norm@50keV : 7.12184E-03 ( -0.000139255 0.000139163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.91 using 59 PHA bins.
# Reduced chi-squared = 1.595 for 57 degrees of freedom
# Null hypothesis probability = 2.872442e-03
Photon flux (15-150 keV) in 317.1 sec: 1.04646 ( -0.0243721 0.0244982 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07856e-05 ( -4.02118e-07 4.02225e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-94.256000 -56.479300
-55.000000 35.590000
37.000000 225.780000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37929 ( -0.178977 0.172078 )
Epeak [keV] : 54.7880 ( -3.87369 4.72129 )
Norm@50keV : 1.34792E-02 ( -0.00229631 0.00290048 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.57 using 59 PHA bins.
# Reduced chi-squared = 0.9923 for 56 degrees of freedom
# Null hypothesis probability = 4.911205e-01
Photon flux (15-150 keV) in 317.1 sec: 0.990144 ( -0.028456 0.028686 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.9776e-05 ( -4.91917e-07 4.92583e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-94.256000 -56.479300
-55.000000 35.590000
37.000000 225.780000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.951520 ( -0.397055 0.712319 )
beta : -2.22503 ( -0.221595 0.119782 )
Epeak [keV] : 46.0649 ( -7.35596 7.35649 )
Norm@50keV : 2.40340E-02 ( -0.00991656 0.045281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.50 using 59 PHA bins.
# Reduced chi-squared = 0.9182 for 55 degrees of freedom
# Null hypothesis probability = 6.468859e-01
Photon flux (15-150 keV) in 317.1 sec: 0.974719 ( 6.02528 -0.031308 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.97702e-05 ( -1.9768e-05 -4.74382e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.0279 ( )
R^2/D10^2 : 0.165238 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 477.27 using 59 PHA bins.
# Reduced chi-squared = 8.3731 for 57 degrees of freedom
# Null hypothesis probability = 1.107500e-67
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.886e-06 7.864e-08
25- 50 6.511e-06 1.601e-07
50-150 6.995e-06 2.616e-07
15-150 1.539e-05 3.044e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 86.0307 (-5.53942 6.18462)
Norm : 4.61588 (-0.161921 0.169012)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.54 using 59 PHA bins.
# Reduced chi-squared = 0.9744 for 57 degrees of freedom
# Null hypothesis probability = 5.300428e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.813e-06 1.268e-07
25- 50 6.384e-06 1.395e-07
50-150 9.451e-06 3.520e-07
15-150 1.965e-05 4.059e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.32282 (-0.556583 0.570512)
R1^2/D10^2 : 1.01208 (-0.225981 0.321249)
kT2 [keV] : 22.6491 (-1.86792 2.37118)
R2^2/D10^2 : 1.40295E-02 (-0.00473583 0.00619472)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.16 using 59 PHA bins.
# Reduced chi-squared = 1.148 for 55 degrees of freedom
# Null hypothesis probability = 2.104068e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.307e-06 2.345e-07
25- 50 6.554e-06 2.236e-07
50-150 9.429e-06 5.850e-07
15-150 1.929e-05 7.626e-07
Peak spectrum fit
Power-law model
Time interval is from 204.944 sec. to 205.944 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.52864 ( -0.323181 0.326438 )
Norm@50keV : 1.19307E-02 ( -0.00240175 0.00237206 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.63 using 59 PHA bins.
# Reduced chi-squared = 1.590 for 57 degrees of freedom
# Null hypothesis probability = 3.045944e-03
Photon flux (15-150 keV) in 1 sec: 1.50118 ( -0.289318 0.289836 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.12666e-07 ( -2.43154e-08 2.49935e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 204.944 sec. to 205.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 6.25114E-02 ( -6.16809 1.61598 )
Epeak [keV] : 56.8202 ( -17.2025 -56.3569 )
Norm@50keV : 7.94689E-02 ( -0.0845079 360.833 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 88.73 using 59 PHA bins.
# Reduced chi-squared = 1.585 for 56 degrees of freedom
# Null hypothesis probability = 3.486558e-03
Photon flux (15-150 keV) in 1 sec: 1.40891 ( -0.3401 0.31494 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.46127e-08 ( -3.21163e-08 2.56513e-08 ) ergs/cm2
Band function
Time interval is from 204.944 sec. to 205.944 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.57228 ( -4.99149 -4.57228 )
beta : -2.54471 ( -1.57993 0.772173 )
Epeak [keV] : 39.4215 ( -8.61361 6.23532 )
Norm@50keV : 54.8177 ( -10.0924 350.461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.28 using 59 PHA bins.
# Reduced chi-squared = 1.551 for 55 degrees of freedom
# Null hypothesis probability = 5.499608e-03
Photon flux (15-150 keV) in 1 sec: 1.53246 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 9.68919e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.0386 (-2.11495 2.90771)
R^2/D10^2 : 0.382077 (-0.210559 0.396605)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.49 using 59 PHA bins.
# Reduced chi-squared = 1.570 for 57 degrees of freedom
# Null hypothesis probability = 3.865817e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.171e-08 3.937e-09
25- 50 3.701e-08 1.134e-08
50-150 3.232e-08 1.429e-08
15-150 8.104e-08 2.516e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 183.840 (-105.32 -182.413)
Norm : 6.17703 (-1.19334 1.54891)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.80 using 59 PHA bins.
# Reduced chi-squared = 1.575 for 57 degrees of freedom
# Null hypothesis probability = 3.623541e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.554e-08 8.960e-09
25- 50 2.960e-08 1.655e-08
50-150 6.315e-08 3.605e-08
15-150 1.083e-07 6.225e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 89.49 using 59 PHA bins.
#Fit statistic : Chi-Squared = 89.44 using 59 PHA bins.
#Fit statistic : Chi-Squared = 85.38 using 59 PHA bins.
#Fit statistic : Chi-Squared = 85.29 using 59 PHA bins.
# Reduced chi-squared = 1.627 for 55 degrees of freedom
# Reduced chi-squared = 1.626 for 55 degrees of freedom
# Reduced chi-squared = 1.552 for 55 degrees of freedom
# Reduced chi-squared = 1.551 for 55 degrees of freedom
# Null hypothesis probability = 2.265096e-03
# Null hypothesis probability = 2.288830e-03
# Null hypothesis probability = 5.389281e-03
# Null hypothesis probability = 5.492670e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Tue Jan 29 16:08:44 EST 2019