batgrbproduct analysis for trigger=949361
batgrbproduct Analysis for Trigger=949361
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 Jan 16 12:28:09 EST 2020
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger949361/GCN5_download_cron
======================================================================
Trigger: 00949361 Segment: 000
BAT Trigger Time: 600781848 [s; MET]
Trigger Stop: 600781912 [s; MET]
UTC: 2020-01-15T11:50:23.734140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 56.4539329277401 Dec: 5.61281785041262 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 15.01
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 15.01
Flight Position: [ source = BAT ]
RA: 56.4539329277401 Dec: 5.61281785041262 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 56.4527410373152 Dec: 5.60722094734897 [deg; J2000]
{ 03h 45m 48.7s , +05d 36' 26.0" }
+/- 1.10721526079835 [arcmin] (estimated 90% radius based on SNR)
+/- 0.378576351395143 [arcmin] (formal 1-sigma fit error)
SNR: 26.2984237222309
Angular difference between Flight and Ground position is 0.343273 arcmin
Partial Coding Fraction: 0.828125 [ including projection effects ]
Duration
T90: 158.399999976158 +/- 32.6469502971637
Measured from: -8.90399992465973
to: 149.496000051498 [s; relative to TRIGTIME]
T50: 38.3479999303818 +/- 4.37639124653527
Measured from: 78.1840001344681
to: 116.53200006485 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 99.7480000257492
to: 100.748000025749 [s; relative to TRIGTIME]
Total Fluence
Measured from: -40.2920000553131
to: 233.12399995327 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 5.438962 6.948384 4.410557 0.827763
0.146498 0.151746 0.130300 0.110040 [error]
Peak 0.117124 0.152227 0.149964 0.029235
0.010460 0.011822 0.010493 0.007583 [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 1.86e-06 2.90e-06 3.41e-06 7.74e-06 1.04e-05 1.59e-05 erg/cm2
Error 9.99e-08 9.08e-08 1.34e-07 6.71e-07 3.19e-07 7.62e-07 erg/cm2
Peak flux Power-law 1.10e+00 1.17e+00 8.92e-01 1.10e+00 3.58e+00 4.27e+00 ph/cm2/s
Error 1.49e-01 9.97e-02 8.23e-02 2.07e-01 2.83e-01 3.34e-01 ph/cm2/s
Fluence Cutoff-PL 1.69e-06 3.01e-06 3.49e-06 4.08e-06 1.00e-05 1.23e-05 erg/cm2
Error 1.25e-07 1.05e-07 1.46e-07 1.20e-06 3.71e-07 1.26e-06 erg/cm2
Peak flux Cutoff-PL 9.70e-01 1.23e+00 9.52e-01 6.48e-01 3.51e+00 3.80e+00 ph/cm2/s
Error 1.85e-01 1.15e-01 1.01e-01 -------- 2.91e-01 4.39e-01 ph/cm2/s
Fluence Band 1.66e-06 3.01e-06 3.45e-06 5.46e-06 1.00e-05 1.36e-05 erg/cm2
Error 1.56e-07 1.32e-07 -------- -------- 3.71e-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 1.768 0.055 - - 4.14e-03 1.24e-04 53.760 57
CPL 1.293 0.239 75.0 17.5 7.09e-03 1.91e-03 40.880 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.396 0.128 - - 2.94e-02 2.27e-03 66.850 57
CPL 0.826 0.552 111.1 231.2 5.51e-02 3.53e-02 63.300 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: 73.920000 sec.
T50 in the 50-300 keV band: 23.296000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 273.416 -40.292 233.124
T90 158.400 -8.904 149.496
T50 38.348 78.184 116.532
Peak 1.000 99.748 100.748
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
56.4527 +5.6072 0.0073 30.1 -165.2 4.6846 26.3 TRIG_00949361
------------------------------------------
Foreground time interval of the image:
-10.999 84.701 (delta_t = 95.700 [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 -40.292 sec. to 233.124 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.76823 ( -0.0552131 0.0554767 )
Norm@50keV : 4.14231E-03 ( -0.000123694 0.000123506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.76 using 59 PHA bins.
# Reduced chi-squared = 0.9432 for 57 degrees of freedom
# Null hypothesis probability = 5.972244e-01
Photon flux (15-150 keV) in 273.4 sec: 0.563923 ( -0.0180682 0.0181292 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04399e-05 ( -3.19088e-07 3.19687e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.292 sec. to 233.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.29264 ( -0.245143 0.232155 )
Epeak [keV] : 75.0341 ( -10.4635 24.5339 )
Norm@50keV : 7.09312E-03 ( -0.0016017 0.00221159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.88 using 59 PHA bins.
# Reduced chi-squared = 0.7300 for 56 degrees of freedom
# Null hypothesis probability = 9.354322e-01
Photon flux (15-150 keV) in 273.4 sec: 0.544124 ( -0.020131 0.020214 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00459e-05 ( -3.71223e-07 3.70566e-07 ) ergs/cm2
Band function
Time interval is from -40.292 sec. to 233.124 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21797 ( -0.282486 2.20769 )
beta : -2.16874 ( 2.16874 0.337006 )
Epeak [keV] : 69.2495 ( -36.0043 25.8833 )
Norm@50keV : 7.82081E-03 ( -0.00217841 0.283051 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.33 using 59 PHA bins.
# Reduced chi-squared = 0.7333 for 55 degrees of freedom
# Null hypothesis probability = 9.307715e-01
Photon flux (15-150 keV) in 273.4 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00374e-05 ( -1.00355e-05 -3.7166e-07 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 13.7053 ( )
R^2/D10^2 : 7.98511E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 249.18 using 59 PHA bins.
# Reduced chi-squared = 4.3715 for 57 degrees of freedom
# Null hypothesis probability = 7.349867e-26
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.677e-07 4.757e-08
25- 50 3.159e-06 1.107e-07
50-150 3.864e-06 2.351e-07
15-150 7.891e-06 2.474e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 124.081 (-18.0695 15.585)
Norm : 2.32068 (-0.0881812 0.127327)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.28 using 59 PHA bins.
# Reduced chi-squared = 0.7242 for 57 degrees of freedom
# Null hypothesis probability = 9.418839e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.650e-06 1.003e-07
25- 50 2.969e-06 1.353e-07
50-150 5.385e-06 1.228e-06
15-150 1.000e-05 1.352e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.83974 (-0.744251 0.80479)
R1^2/D10^2 : 0.660316 (-0.207016 0.336732)
kT2 [keV] : 22.6126 (-2.1982 2.96323)
R2^2/D10^2 : 9.54522E-03 (-0.00370752 0.00494079)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.57 using 59 PHA bins.
# Reduced chi-squared = 0.7923 for 55 degrees of freedom
# Null hypothesis probability = 8.666640e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.568e-06 1.459e-07
25- 50 3.042e-06 2.115e-07
50-150 5.270e-06 4.730e-07
15-150 9.880e-06 6.890e-07
Peak spectrum fit
Power-law model
Time interval is from 99.748 sec. to 100.748 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.39622 ( -0.127407 0.128103 )
Norm@50keV : 2.94317E-02 ( -0.00227331 0.00226872 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.85 using 59 PHA bins.
# Reduced chi-squared = 1.173 for 57 degrees of freedom
# Null hypothesis probability = 1.746754e-01
Photon flux (15-150 keV) in 1 sec: 3.58117 ( -0.282469 0.282833 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.84609e-07 ( -2.3978e-08 2.40769e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 99.748 sec. to 100.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.826236 ( -0.585435 0.518409 )
Epeak [keV] : 111.147 ( -31.6861 430.757 )
Norm@50keV : 5.50526E-02 ( -0.0234668 0.0470469 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.130 for 56 degrees of freedom
# Null hypothesis probability = 2.344694e-01
Photon flux (15-150 keV) in 1 sec: 3.50788 ( -0.29126 0.29077 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78047e-07 ( -2.5082e-08 2.5065e-08 ) ergs/cm2
Band function
Time interval is from 99.748 sec. to 100.748 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.826918 ( -0.234291 0.650188 )
beta : -10.0000 ( 10 3.55271e-15 )
Epeak [keV] : 111.187 ( -23.2697 422.159 )
Norm@50keV : 5.50125E-02 ( -0.0234356 0.0470386 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.30 using 59 PHA bins.
# Reduced chi-squared = 1.151 for 55 degrees of freedom
# Null hypothesis probability = 2.068143e-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] : 17.4161 (-1.54047 1.70816)
R^2/D10^2 : 0.256835 (-0.0710128 0.0963985)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 91.05 using 59 PHA bins.
# Reduced chi-squared = 1.597 for 57 degrees of freedom
# Null hypothesis probability = 2.788326e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.576e-08 2.380e-09
25- 50 7.106e-08 7.990e-09
50-150 1.550e-07 2.115e-08
15-150 2.419e-07 2.475e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-28.1867 -200)
Norm : 14.8799 (-1.1419 1.1419)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.15 using 59 PHA bins.
# Reduced chi-squared = 1.213 for 57 degrees of freedom
# Null hypothesis probability = 1.297249e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.705e-08 3.535e-09
25- 50 7.127e-08 7.745e-09
50-150 1.563e-07 4.591e-08
15-150 2.646e-07 6.760e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.18840 (-1.61667 2.24544)
R1^2/D10^2 : 8.43994 (-6.16786 35.3067)
kT2 [keV] : 22.1733 (-2.90868 4.41073)
R2^2/D10^2 : 9.91987E-02 (-0.0494253 0.0681276)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.38 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 55 degrees of freedom
# Null hypothesis probability = 2.580054e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.274e-08 1.442e-08
25- 50 6.475e-08 1.503e-08
50-150 1.763e-07 3.315e-08
15-150 2.738e-07 5.105e-08
Plot creation:
Thu Jan 16 12:31:39 EST 2020