batgrbproduct analysis for trigger=889443
batgrbproduct Analysis for Trigger=889443
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): Mon Feb 18 20:32:58 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger889443/GCN5_download_cron
======================================================================
Trigger: 00889443 Segment: 000
BAT Trigger Time: 572139264 [s; MET]
Trigger Stop: 572139328 [s; MET]
UTC: 2019-02-17T23:34:01.564880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.811509908117 Dec: 35.084398485743 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.19
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.19
Flight Position: [ source = BAT ]
RA: 299.811509908117 Dec: 35.084398485743 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 299.710416895183 Dec: 35.1411305584615 [deg; J2000]
{ 19h 58m 50.5s , +35d 08' 28.1" }
+/- 1.21521504173327 [arcmin] (estimated 90% radius based on SNR)
+/- 0.382408379636345 [arcmin] (formal 1-sigma fit error)
SNR: 23.0242412835006
Angular difference between Flight and Ground position is 6.017135 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 197.503999948502 +/- 29.7686240801893
Measured from: -78.9799998998642
to: 118.524000048637 [s; relative to TRIGTIME]
T50: 98.3639998435974 +/- 14.8436027856423
Measured from: -36.827999830246
to: 61.5360000133514 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -91.3639999628067
to: -90.3639999628067 [s; relative to TRIGTIME]
Total Fluence
Measured from: -92.0160000324249
to: 145.620000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.867103 2.435636 1.421965 0.069597
0.119483 0.121751 0.106466 0.097758 [error]
Peak 0.054880 0.004154 0.016526 0.002260
0.014579 0.013324 0.012373 0.010421 [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 5.75e-07 9.11e-07 1.09e-06 2.52e-06 3.30e-06 5.09e-06 erg/cm2
Error 5.56e-08 5.59e-08 1.02e-07 4.87e-07 2.36e-07 5.80e-07 erg/cm2
Peak flux Power-law 3.82e-01 1.60e-01 3.94e-02 1.19e-02 5.88e-01 5.93e-01 ph/cm2/s
Error 2.91e-01 1.21e-01 6.69e-02 5.68e-02 3.02e-01 3.11e-01 ph/cm2/s
Fluence Cutoff-PL 5.18e-07 9.88e-07 1.08e-06 7.88e-07 3.05e-06 3.38e-06 erg/cm2
Error 6.54e-08 7.34e-08 1.14e-07 5.50e-07 2.72e-07 6.14e-07 erg/cm2
Peak flux Cutoff-PL 3.86e-01 1.54e-01 3.60e-02 1.01e-02 5.83e-01 5.90e-01 ph/cm2/s
Error 1.98e-01 1.33e-01 6.69e-02 5.64e-02 3.01e-01 3.05e-01 ph/cm2/s
Fluence Band 5.14e-07 9.82e-07 1.08e-06 8.79e-07 3.06e-06 3.49e-06 erg/cm2
Error 6.16e-08 -------- 1.08e-07 -------- -------- -------- erg/cm2
Peak flux Band 9.04e-02 8.17e-02 4.29e-02 1.88e-02 2.27e-01 2.34e-01 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 1.746 0.113 - - 1.51e-03 1.03e-04 63.030 57
CPL 0.950 0.517 59.7 17.6 4.05e-03 2.86e-03 54.640 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.019 1.762 - - 2.11e-03 2.63e-03 55.190 57
CPL -9.869 1.031 18.9 4.4 1.19e+08 1.92e+09 54.370 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 237.636 -92.016 145.620
T90 197.504 -78.980 118.524
T50 98.364 -36.828 61.536
Peak 1.000 -91.364 -90.364
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
299.7104 +35.1411 0.0083 9.1 -5.4 3.0392 23.0 TRIG_00889443
------------------------------------------
Foreground time interval of the image:
-16.599 71.001 (delta_t = 87.600 [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
Time interval is from -92.016 sec. to 145.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74554 ( -0.111529 0.11361 )
Norm@50keV : 1.50595E-03 ( -0.000103424 0.000102497 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.03 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.715407e-01
Photon flux (15-150 keV) in 237.6 sec: 0.203296 ( -0.01257 0.0125799 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.30254e-06 ( -2.35081e-07 2.37705e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -92.016 sec. to 145.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.950105 ( -0.548975 0.485429 )
Epeak [keV] : 59.7271 ( -9.6297 25.5469 )
Norm@50keV : 4.04762E-03 ( -0.00180473 0.00390535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.64 using 59 PHA bins.
# Reduced chi-squared = 0.9757 for 56 degrees of freedom
# Null hypothesis probability = 5.265469e-01
Photon flux (15-150 keV) in 237.6 sec: 0.195006 ( -0.013442 0.013451 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.05076e-06 ( -2.67989e-07 2.75925e-07 ) ergs/cm2
Band function
Time interval is from -92.016 sec. to 145.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.950039 ( -0.364113 0.696644 )
beta : -10.0000 ( 10 1.77636e-15 )
Epeak [keV] : 59.7152 ( -9.63303 25.5439 )
Norm@50keV : 4.04771E-03 ( -0.00180473 0.00390757 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.64 using 59 PHA bins.
# Reduced chi-squared = 0.9934 for 55 degrees of freedom
# Null hypothesis probability = 4.884075e-01
Photon flux (15-150 keV) in 237.6 sec: 0.196310 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 3.06007e-06 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.1524 (-0.86702 0.944882)
R^2/D10^2 : 4.65646E-02 (-0.011239 0.0146639)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 90.89 using 59 PHA bins.
# Reduced chi-squared = 1.595 for 57 degrees of freedom
# Null hypothesis probability = 2.886921e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.459e-07 3.635e-08
25- 50 1.105e-06 8.078e-08
50-150 9.892e-07 1.428e-07
15-150 2.440e-06 1.797e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 99.8785 (-15.9084 47.4527)
Norm : 0.900055 (-0.0934297 0.0673139)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.21 using 59 PHA bins.
# Reduced chi-squared = 0.9862 for 57 degrees of freedom
# Null hypothesis probability = 5.046452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.590e-07 5.548e-08
25- 50 9.663e-07 7.271e-08
50-150 1.565e-06 4.682e-07
15-150 3.090e-06 5.346e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.11403 (-1.78713 1.96318)
R1^2/D10^2 : 0.323466 (-0.183613 0.801924)
kT2 [keV] : 18.6818 (-3.47492 6.61117)
R2^2/D10^2 : 7.31457E-03 (-0.00521133 0.0101528)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.93 using 59 PHA bins.
# Reduced chi-squared = 1.017 for 55 degrees of freedom
# Null hypothesis probability = 4.398235e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.120e-07 1.950e-07
25- 50 9.772e-07 2.591e-07
50-150 1.497e-06 5.332e-07
15-150 2.986e-06 9.113e-07
Peak spectrum fit
Power-law model
Time interval is from -91.364 sec. to -90.364 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.01853 ( -1.30401 2.22039 )
Norm@50keV : 2.11107E-03 ( -0.00211107 0.00315461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.19 using 59 PHA bins.
# Reduced chi-squared = 0.9683 for 57 degrees of freedom
# Null hypothesis probability = 5.432265e-01
Photon flux (15-150 keV) in 1 sec: 0.588440 ( -0.29948 0.304912 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.55825e-08 ( -1.57187e-08 2.30959e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -91.364 sec. to -90.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.86866 ( 9.89981 11.9609 )
Epeak [keV] : 18.8867 ( -4.24808 4.49848 )
Norm@50keV : 1.18682E+08 ( -1.40715e+08 3.70583e+09 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.37 using 59 PHA bins.
# Reduced chi-squared = 0.9709 for 56 degrees of freedom
# Null hypothesis probability = 5.367105e-01
Photon flux (15-150 keV) in 1 sec: 0.582788 ( -0.294497 0.307398 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3843e-16 ( 0 0 ) ergs/cm2
Band function
Time interval is from -91.364 sec. to -90.364 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.32852 ( 1.76306 1.76306 )
beta : -4.79218 ( 3.17773 1.44089 )
Epeak [keV] : 17.7636 ( -5.71306 -5.71306 )
Norm@50keV : 2817.08 ( -2816.57 7.19929e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 55 degrees of freedom
# Null hypothesis probability = 4.875245e-01
Photon flux (15-150 keV) in 1 sec: 0.226692 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.43875e-08 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 3.94539 (-1.47722 2.76678)
R^2/D10^2 : 15.4293 (-15.4351 195.48)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.15 using 59 PHA bins.
# Reduced chi-squared = 0.9676 for 57 degrees of freedom
# Null hypothesis probability = 5.447364e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.312e-08 8.075e-09
25- 50 4.555e-09 3.328e-09
50-150 5.093e-11 7.535e-11
15-150 1.773e-08 1.110e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 12.2329 (-7.75995 91.1818)
Norm : 13.1688 (-13.1644 118.481)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.45 using 59 PHA bins.
# Reduced chi-squared = 0.9729 for 57 degrees of freedom
# Null hypothesis probability = 5.332446e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.219e-08 7.450e-09
25- 50 6.740e-09 4.906e-09
50-150 7.687e-10 8.750e-10
15-150 1.970e-08 1.278e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.68878 (-3.64498 2.45014)
R1^2/D10^2 : 20.0863 (-20.6038 551.638)
kT2 [keV] : 25.6547 (-25.3625 -25.3625)
R2^2/D10^2 : 4.48504E-03 (-0.00462541 -0.00462541)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.92 using 59 PHA bins.
# Reduced chi-squared = 0.9803 for 55 degrees of freedom
# Null hypothesis probability = 5.160721e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.267e-08 8.305e-09
25- 50 6.371e-09 3.450e-09
50-150 1.415e-08 1.114e-08
15-150 3.320e-08 1.982e-08
Plot creation:
Mon Feb 18 20:37:36 EST 2019