batgrbproduct analysis for trigger=892607
batgrbproduct Analysis for Trigger=892607
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 Mar 12 20:53:11 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger892607/GCN5_download_cron
======================================================================
Trigger: 00892607 Segment: 000
BAT Trigger Time: 574007036.224 [s; MET]
Trigger Stop: 574007037.248 [s; MET]
UTC: 2019-03-11T14:23:33.671280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.102032655211 Dec: 53.5194678294132 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.45
Image Trigger?: NO
Rate S/N Ratio: 13.4164078649987 [ if not an image trigger ]
Image S/N Ratio: 8.45
Flight Position: [ source = BAT ]
RA: 212.102032655211 Dec: 53.5194678294132 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 212.067150632998 Dec: 53.4858758187463 [deg; J2000]
{ 14h 08m 16.1s , +53d 29' 09.2" }
+/- 1.32083804833539 [arcmin] (estimated 90% radius based on SNR)
+/- 0.44189791795208 [arcmin] (formal 1-sigma fit error)
SNR: 20.4397761847003
Angular difference between Flight and Ground position is 2.368955 arcmin
Partial Coding Fraction: 0.796875 [ including projection effects ]
Duration
T90: 17 +/- 6.80073525436772
Measured from: -1.22399985790253
to: 15.7760001420975 [s; relative to TRIGTIME]
T50: 5 +/- 1.4142135623731
Measured from: 0.776000142097473
to: 5.77600014209747 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.776000022888184
to: 1.77600002288818 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.22399997711182
to: 20.7760000228882 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.563585 0.562942 0.389564 0.104287
0.043653 0.045156 0.040899 0.038108 [error]
Peak 0.074217 0.079119 0.046256 0.012925
0.010195 0.010601 0.009844 0.008470 [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 1.68e-07 2.58e-07 2.95e-07 6.49e-07 9.14e-07 1.37e-06 erg/cm2
Error 2.28e-08 2.19e-08 4.06e-08 1.86e-07 9.26e-08 2.23e-07 erg/cm2
Peak flux Power-law 7.59e-01 6.13e-01 3.34e-01 2.67e-01 1.83e+00 1.97e+00 ph/cm2/s
Error 1.71e-01 8.91e-02 8.26e-02 1.30e-01 2.66e-01 2.93e-01 ph/cm2/s
Fluence Cutoff-PL 1.69e-07 2.58e-07 2.95e-07 6.38e-07 9.12e-07 1.36e-06 erg/cm2
Error 2.30e-08 2.19e-08 4.06e-08 2.36e-07 9.32e-08 2.70e-07 erg/cm2
Peak flux Cutoff-PL 7.67e-01 6.13e-01 3.30e-01 2.58e-01 1.83e+00 1.97e+00 ph/cm2/s
Error 1.74e-01 9.41e-02 -------- 2.07e-01 2.66e-01 3.14e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- 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 1.802 0.166 - - 4.32e-03 4.25e-04 61.570 57
CPL 1.808 0.268 9999.3 -0.0 4.29e-03 2.39e-03 61.590 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.874 0.295 - - 1.29e-02 2.35e-03 59.760 57
CPL 2.008 0.000 3.5 0.0 1.05e-02 0.00e+00 59.440 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: 8.448000 sec.
T50 in the 50-300 keV band: 3.584000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 23.000 -2.224 20.776
T90 17.000 -1.224 15.776
T50 5.000 0.776 5.776
Peak 1.000 0.776 1.776
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
212.0672 +53.4859 0.0094 33.0 -13.4 1.4591 20.4 TRIG_00892607
------------------------------------------
Foreground time interval of the image:
-2.224 9.677 (delta_t = 11.901 [sec])
Background time interval of the image:
-60.224 -2.224 (delta_t = 58.000 [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 -2.224 sec. to 20.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80199 ( -0.163371 0.168012 )
Norm@50keV : 4.31720E-03 ( -0.000429208 0.000421012 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.57 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.160018e-01
Photon flux (15-150 keV) in 23 sec: 0.595360 ( -0.0511609 0.0512169 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.14054e-07 ( -9.19496e-08 9.33188e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.224 sec. to 20.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.80760 ( -0.371105 0.164969 )
Epeak [keV] : 9999.26 ( -9999.35 -9999.36 )
Norm@50keV : 4.28875E-03 ( -0.00151328 0.00326014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.59 using 59 PHA bins.
# Reduced chi-squared = 1.100 for 56 degrees of freedom
# Null hypothesis probability = 2.830421e-01
Photon flux (15-150 keV) in 23 sec: 0.595233 ( -0.05124 0.05106 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.1241e-07 ( -9.34904e-08 9.28303e-08 ) ergs/cm2
Band function
Time interval is from -2.224 sec. to 20.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95100 ( -4.951 -4.951 )
beta : -1.83539 ( -0.18415 0.172915 )
Epeak [keV] : 19.3982 ( -19.3982 4.13685 )
Norm@50keV : 2779.63 ( -235.455 3.88626e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.91 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.717143e-01
Photon flux (15-150 keV) in 23 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] : 11.6524 (-1.33024 1.50667)
R^2/D10^2 : 0.152451 (-0.0549508 0.0868144)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 104.82 using 59 PHA bins.
# Reduced chi-squared = 1.8389 for 57 degrees of freedom
# Null hypothesis probability = 1.177501e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.004e-07 1.708e-08
25- 50 3.050e-07 3.254e-08
50-150 2.441e-07 4.940e-08
15-150 6.495e-07 7.027e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 102.690 (-29.5653 61.933)
Norm : 2.59202 (-0.312468 0.356795)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.72 using 59 PHA bins.
# Reduced chi-squared = 1.136 for 57 degrees of freedom
# Null hypothesis probability = 2.251434e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.558e-07 2.039e-08
25- 50 2.708e-07 2.748e-08
50-150 4.455e-07 1.749e-07
15-150 8.722e-07 1.931e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.07178 (-1.17071 1.65301)
R1^2/D10^2 : 2.50372 (-1.61902 4.7659)
kT2 [keV] : 20.7327 (-4.46914 9.88801)
R2^2/D10^2 : 1.48444E-02 (-0.0111118 0.0139106)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.18 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 55 degrees of freedom
# Null hypothesis probability = 1.857133e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.761e-07 8.298e-08
25- 50 2.424e-07 6.761e-08
50-150 4.592e-07 1.901e-07
15-150 8.777e-07 2.842e-07
Peak spectrum fit
Power-law model
Time interval is from 0.776 sec. to 1.776 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87396 ( -0.282512 0.307855 )
Norm@50keV : 1.28679E-02 ( -0.00240719 0.0022972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.76 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 57 degrees of freedom
# Null hypothesis probability = 3.755992e-01
Photon flux (15-150 keV) in 1 sec: 1.82660 ( -0.266203 0.266324 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18295e-07 ( -2.12822e-08 2.18808e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.776 sec. to 1.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00779 ( -2.00779 -2.00779 )
Epeak [keV] : 3.52843 ( )
Norm@50keV : 1.05037E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.44 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 56 degrees of freedom
# Null hypothesis probability = 3.513121e-01
Photon flux (15-150 keV) in 1 sec: 1.82703 ( -0.26746 0.26553 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.17683e-07 ( -2.12445e-08 2.2193e-08 ) ergs/cm2
Band function
Time interval is from 0.776 sec. to 1.776 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -2.83755 ( 6.84248 2.83755 )
beta : -1.87396 ( -0.307855 0.282523 )
Epeak [keV] : 101.447 ( -101.447 -101.447 )
Norm@50keV : 1.74893 ( -0.327172 0.312222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.76 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 55 degrees of freedom
# Null hypothesis probability = 3.068049e-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] : 10.5767 (-1.94953 2.48909)
R^2/D10^2 : 0.669180 (-0.361686 0.763773)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 75.19 using 59 PHA bins.
# Reduced chi-squared = 1.319 for 57 degrees of freedom
# Null hypothesis probability = 5.356787e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.550e-08 4.009e-09
25- 50 4.164e-08 1.138e-08
50-150 2.550e-08 1.094e-08
15-150 8.264e-08 1.851e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 93.0064 (-39.9188 -93.006)
Norm : 8.13032 (-1.57861 2.23559)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.33 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 57 degrees of freedom
# Null hypothesis probability = 3.236230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.123e-08 4.420e-09
25- 50 3.617e-08 7.345e-09
50-150 5.618e-08 3.633e-08
15-150 1.136e-07 3.769e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.45662 (-1.22712 6.36054)
R1^2/D10^2 : 3.26259 (-154.094 16514.3)
kT2 [keV] : 27.5829 (-16.1072 73.8873)
R2^2/D10^2 : 1.49777E-02 (-0.0147338 0.0801619)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.60 using 59 PHA bins.
#Fit statistic : Chi-Squared = 62.44 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Reduced chi-squared = 1.135 for 55 degrees of freedom
# Null hypothesis probability = 2.247604e-01
# Null hypothesis probability = 2.289289e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.332e-08 1.095e-08
25- 50 3.291e-08 1.525e-08
50-150 4.554e-08 2.360e-08
15-150 1.018e-07 3.769e-08
Plot creation:
Tue Mar 12 20:56:50 EDT 2019