batgrbproduct analysis for trigger=890732
batgrbproduct Analysis for Trigger=890732
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): Wed Feb 27 11:24:20 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger890732/GCN5_download_cron
======================================================================
Trigger: 00890732 Segment: 000
BAT Trigger Time: 572854392 [s; MET]
Trigger Stop: 572854776 [s; MET]
UTC: 2019-02-26T06:12:49.519860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 247.820750208511 Dec: -47.792067693141 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.43
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.43
Flight Position: [ source = BAT ]
RA: 247.820750208511 Dec: -47.792067693141 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 247.77763381804 Dec: -47.7993425912266 [deg; J2000]
{ 16h 31m 06.6s , -47d 47' 57.6" }
+/- 3.01665761119949 [arcmin] (estimated 90% radius based on SNR)
+/- 1.74983158113715 [arcmin] (formal 1-sigma fit error)
SNR: 6.28175808504914
Angular difference between Flight and Ground position is 1.791851 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
T50: 384 +/-
Measured from: 0
to: 384 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 384 second)
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 384 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.127519 2.152097 0.348207 -0.019127
0.211491 0.179663 0.146720 0.125423 [error]
Peak 3.127519 2.152097 0.348207 -0.019127
0.211491 0.179663 0.146720 0.125423 [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 1.02e-06 8.26e-07 4.50e-07 3.59e-07 2.46e-06 2.66e-06 erg/cm2
Error 1.24e-07 9.50e-08 1.11e-07 1.64e-07 2.72e-07 3.48e-07 erg/cm2
Peak flux Power-law 8.86e-02 4.01e-02 1.09e-02 3.70e-03 1.42e-01 1.43e-01 ph/cm2/s
Error 1.10e-02 4.42e-03 2.61e-03 1.59e-03 1.36e-02 1.37e-02 ph/cm2/s
Fluence Cutoff-PL 9.65e-07 9.09e-07 3.51e-07 4.94e-08 2.27e-06 2.27e-06 erg/cm2
Error 1.39e-07 1.22e-07 1.40e-07 1.31e-07 2.83e-07 3.16e-07 erg/cm2
Peak flux Cutoff-PL 8.25e-02 4.41e-02 8.87e-03 6.61e-04 1.36e-01 1.36e-01 ph/cm2/s
Error 1.25e-02 5.74e-03 3.26e-03 1.46e-03 1.43e-02 1.44e-02 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 2.876 0.239 - - 5.63e-04 1.02e-04 55.340 57
CPL 1.680 0.803 9.2 0.0 3.27e-03 0.00e+00 51.430 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.876 0.239 - - 5.63e-04 1.02e-04 55.340 57
CPL 1.680 0.803 9.2 0.0 3.27e-03 0.00e+00 51.430 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 384.000 0.000 384.000
T90 384.000 0.000 384.000
T50 384.000 0.000 384.000
Peak 384.000 0.000 384.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
247.7776 -47.7993 0.0304 20.7 -97.5 4.8675 6.3 TRIG_00890732
------------------------------------------
Foreground time interval of the image:
0.000 384.000 (delta_t = 384.000 [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 0.000 sec. to 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.87642 ( -0.228312 0.249269 )
Norm@50keV : 5.63231E-04 ( -0.000101484 0.00010269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.34 using 59 PHA bins.
# Reduced chi-squared = 0.9709 for 57 degrees of freedom
# Null hypothesis probability = 5.375742e-01
Photon flux (15-150 keV) in 384 sec: 0.141794 ( -0.0136008 0.0136121 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46167e-06 ( -2.68361e-07 2.7545e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68002 ( -1.28176 0.32515 )
Epeak [keV] : 9.23399 ( )
Norm@50keV : 3.27234E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.43 using 59 PHA bins.
# Reduced chi-squared = 0.9184 for 56 degrees of freedom
# Null hypothesis probability = 6.482289e-01
Photon flux (15-150 keV) in 384 sec: 0.136102 ( -0.014301 0.01435 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26764e-06 ( -2.67341e-07 2.99374e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.71112 ( -0.327765 0.623134 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 8.64618 ( -5.49571 14.1276 )
Norm@50keV : 3.09627E-03 ( -0.00144645 0.0161016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.44 using 59 PHA bins.
# Reduced chi-squared = 0.9352 for 55 degrees of freedom
# Null hypothesis probability = 6.115528e-01
Photon flux (15-150 keV) in 384 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] : 6.82631 (-0.71772 0.769546)
R^2/D10^2 : 0.277801 (-0.103763 0.176817)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.99 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.182634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.774e-07 1.277e-07
25- 50 1.014e-06 1.551e-07
50-150 1.532e-07 5.374e-08
15-150 1.944e-06 2.690e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4226 (-4.39537 5.6453)
Norm : 1.40369 (-0.304497 0.416065)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.70 using 59 PHA bins.
# Reduced chi-squared = 0.9070 for 57 degrees of freedom
# Null hypothesis probability = 6.736555e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.446e-07 1.279e-07
25- 50 9.275e-07 1.131e-07
50-150 3.578e-07 1.407e-07
15-150 2.230e-06 2.690e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.58052 (-0.898857 1.0471)
R1^2/D10^2 : 19.7111 (-16.9508 71.5625)
kT2 [keV] : 8.66841 (-1.25362 1.73237)
R2^2/D10^2 : 8.19393E-02 (-0.0487215 0.0917823)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.97 using 59 PHA bins.
# Reduced chi-squared = 0.8541 for 55 degrees of freedom
# Null hypothesis probability = 7.708540e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.720e-07 4.344e-07
25- 50 9.463e-07 3.940e-07
50-150 3.067e-07 1.748e-07
15-150 2.225e-06 8.056e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.87642 ( -0.228312 0.249269 )
Norm@50keV : 5.63231E-04 ( -0.000101484 0.00010269 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.34 using 59 PHA bins.
# Reduced chi-squared = 0.9709 for 57 degrees of freedom
# Null hypothesis probability = 5.375742e-01
Photon flux (15-150 keV) in 384 sec: 0.141794 ( -0.0136008 0.0136121 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.46167e-06 ( -2.68361e-07 2.7545e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68002 ( -1.28176 0.32515 )
Epeak [keV] : 9.23399 ( )
Norm@50keV : 3.27234E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.43 using 59 PHA bins.
# Reduced chi-squared = 0.9184 for 56 degrees of freedom
# Null hypothesis probability = 6.482289e-01
Photon flux (15-150 keV) in 384 sec: 0.136102 ( -0.014301 0.01435 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.26764e-06 ( -2.67341e-07 2.99374e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 384.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.71112 ( -0.327765 0.623134 )
beta : -9.37167 ( 9.37167 19.3717 )
Epeak [keV] : 8.64618 ( -5.49571 14.1276 )
Norm@50keV : 3.09627E-03 ( -0.00144645 0.0161016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.44 using 59 PHA bins.
# Reduced chi-squared = 0.9352 for 55 degrees of freedom
# Null hypothesis probability = 6.115528e-01
Photon flux (15-150 keV) in 384 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] : 6.82631 (-0.71772 0.769546)
R^2/D10^2 : 0.277801 (-0.103763 0.176817)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.99 using 59 PHA bins.
# Reduced chi-squared = 1.140 for 57 degrees of freedom
# Null hypothesis probability = 2.182634e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.774e-07 1.213e-07
25- 50 1.014e-06 1.448e-07
50-150 1.532e-07 5.685e-08
15-150 1.944e-06 2.316e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 23.4226 (-4.39537 5.6453)
Norm : 1.40369 (-0.304497 0.416065)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.70 using 59 PHA bins.
# Reduced chi-squared = 0.9070 for 57 degrees of freedom
# Null hypothesis probability = 6.736555e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.446e-07 1.181e-07
25- 50 9.275e-07 1.283e-07
50-150 3.578e-07 1.358e-07
15-150 2.230e-06 2.763e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.58052 (-0.898857 1.0471)
R1^2/D10^2 : 19.7111 (-16.9508 68.6582)
kT2 [keV] : 8.66841 (-1.25362 1.73237)
R2^2/D10^2 : 8.19393E-02 (-0.0487215 0.0917823)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.97 using 59 PHA bins.
# Reduced chi-squared = 0.8541 for 55 degrees of freedom
# Null hypothesis probability = 7.708540e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.720e-07 4.234e-07
25- 50 9.463e-07 3.276e-07
50-150 3.067e-07 1.712e-07
15-150 2.225e-06 1.074e-06
Plot creation:
Wed Feb 27 11:28:20 EST 2019