batgrbproduct analysis for trigger=895503
batgrbproduct Analysis for Trigger=895503
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 Mar 28 17:15:23 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger895503/GCN5_download_cron
======================================================================
Trigger: 00895503 Segment: 000
BAT Trigger Time: 575421396.544 [s; MET]
Trigger Stop: 575421397.056 [s; MET]
UTC: 2019-03-27T23:16:13.901880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.816485815913 Dec: 39.0700161966286 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.64
Image Trigger?: NO
Rate S/N Ratio: 6.16441400296898 [ if not an image trigger ]
Image S/N Ratio: 6.64
Flight Position: [ source = BAT ]
RA: 297.816485815913 Dec: 39.0700161966286 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.881345537845 Dec: 39.0726623847708 [deg; J2000]
{ 19h 51m 31.5s , +39d 04' 21.6" }
+/- 3.5839808001825 [arcmin] (estimated 90% radius based on SNR)
+/- 1.88034716204977 [arcmin] (formal 1-sigma fit error)
SNR: 4.91097153091417
Angular difference between Flight and Ground position is 3.025445 arcmin
Partial Coding Fraction: 0.9296875 [ including projection effects ]
Duration
T90: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
T50: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.51199996471405 second)
Measured from: -5.96046447753906e-08
to: 0.511999905109406 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001722 0.008134 0.021840 0.011023
0.004782 0.005251 0.004560 0.003870 [error]
Peak 0.001722 0.008134 0.021840 0.011023
0.004782 0.005251 0.004560 0.003870 [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 6.04e-10 2.85e-09 1.15e-08 1.74e-07 3.41e-08 1.88e-07 erg/cm2
Error 8.33e-10 2.22e-09 7.65e-09 1.75e-07 1.00e-08 1.72e-07 erg/cm2
Peak flux Power-law 3.67e-02 9.26e-02 1.86e-01 9.41e-01 5.03e-01 1.26e+00 ph/cm2/s
Error 5.15e-02 7.45e-02 1.26e-01 8.19e-01 1.90e-01 7.33e-01 ph/cm2/s
Fluence Cutoff-PL 6.06e-10 2.86e-09 1.15e-08 1.72e-07 3.41e-08 1.87e-07 erg/cm2
Error 8.24e-10 1.85e-09 4.81e-09 -------- 1.00e-08 -------- erg/cm2
Peak flux Cutoff-PL 3.70e-02 9.29e-02 1.87e-01 9.32e-01 5.03e-01 1.25e+00 ph/cm2/s
Error 5.12e-02 -------- 8.23e-02 -------- 1.89e-01 1.59e+00 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 -0.009 0.765 - - 3.71e-03 2.93e-03 41.440 57
CPL -0.017 0.341 9999.4 0.0 3.76e-03 3.06e-02 41.440 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.009 0.765 - - 3.71e-03 2.93e-03 41.440 57
CPL -0.017 0.341 9999.4 0.0 3.76e-03 3.06e-02 41.440 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.512 0.000 0.512
T90 0.512 0.000 0.512
T50 0.512 0.000 0.512
Peak 0.512 -0.000 0.512
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.8813 +39.0727 0.0392 13.1 58.3 0.0441 4.9 TRIG_00895503
------------------------------------------
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-239.544 -67.694 (delta_t = 171.850 [sec])
-66.544 -45.644 (delta_t = 20.900 [sec])
-44.544 -4.544 (delta_t = 40.000 [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 0.000 sec. to 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.48285E-03 ( -0.831409 0.699561 )
Norm@50keV : 3.71142E-03 ( -0.00371142 0.00215732 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7270 for 57 degrees of freedom
# Null hypothesis probability = 9.396958e-01
Photon flux (15-150 keV) in 0.512 sec: 0.502760 ( -0.183176 0.196662 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41053e-08 ( -1.00317e-08 1.00337e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.68087E-02 ( 0.0177616 0.699694 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.75939E-03 ( -0.00136468 0.0598407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7400 for 56 degrees of freedom
# Null hypothesis probability = 9.268393e-01
Photon flux (15-150 keV) in 0.512 sec: 0.503178 ( -0.181904 0.195437 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41345e-08 ( -1.0025e-08 1.00242e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.375233 ( 0.375445 0.375445 )
beta : 9.40393E-03 ( -0.698848 -0.00936119 )
Epeak [keV] : 17.5512 ( -17.5486 -17.5486 )
Norm@50keV : 5.84851E-03 ( -0.00373349 19891.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7534 for 55 degrees of freedom
# Null hypothesis probability = 9.119353e-01
Photon flux (15-150 keV) in 0.512 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] : 57.6825 (-27.9447 -57.745)
R^2/D10^2 : 1.82134E-03 (-0.00181633 0.0077285)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
# Reduced chi-squared = 0.7325 for 57 degrees of freedom
# Null hypothesis probability = 9.351996e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.024e-10 1.832e-10
25- 50 2.252e-09 1.317e-09
50-150 3.132e-08 1.736e-08
15-150 3.388e-08 1.917e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.1875 -200)
Norm : 2.11504 (-0.880401 0.880401)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.17 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.686304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.696e-09 1.771e-09
25- 50 5.186e-09 3.241e-09
50-150 1.137e-08 7.457e-09
15-150 1.925e-08 1.257e-08
Double BB
R1^2/D10^2 : 1.86498E-04 (-0.000185778 0.00813194)
kT2 [keV] : 19.7062 (-19.6347 -19.6347)
R2^2/D10^2 : 1.08686E-02 (-0.0110352 1.81793)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.34 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7592 for 55 degrees of freedom
# Reduced chi-squared = 0.7517 for 55 degrees of freedom
# Reduced chi-squared = 0.7501 for 55 degrees of freedom
# Null hypothesis probability = 9.059906e-01
# Null hypothesis probability = 9.136728e-01
# Null hypothesis probability = 9.153095e-01
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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -9.48285E-03 ( -0.831409 0.699561 )
Norm@50keV : 3.71142E-03 ( -0.00371142 0.00215732 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7270 for 57 degrees of freedom
# Null hypothesis probability = 9.396958e-01
Photon flux (15-150 keV) in 0.512 sec: 0.502760 ( -0.183176 0.196662 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41053e-08 ( -1.00317e-08 1.00337e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.68087E-02 ( 0.0177616 0.699694 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.75939E-03 ( -0.00136468 0.0598407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7400 for 56 degrees of freedom
# Null hypothesis probability = 9.268393e-01
Photon flux (15-150 keV) in 0.512 sec: 0.503178 ( -0.181904 0.195437 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.41345e-08 ( -1.0025e-08 1.00242e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.375233 ( 0.375445 0.375445 )
beta : 9.40393E-03 ( -0.698848 -0.00936119 )
Epeak [keV] : 17.5512 ( -17.5486 -17.5486 )
Norm@50keV : 5.84851E-03 ( -0.00373349 19891.9 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.44 using 59 PHA bins.
# Reduced chi-squared = 0.7534 for 55 degrees of freedom
# Null hypothesis probability = 9.119353e-01
Photon flux (15-150 keV) in 0.512 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] : 57.6825 (-27.9447 -57.745)
R^2/D10^2 : 1.82134E-03 (-0.00181633 0.0077285)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
# Reduced chi-squared = 0.7325 for 57 degrees of freedom
# Null hypothesis probability = 9.351996e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.024e-10 1.791e-10
25- 50 2.252e-09 1.284e-09
50-150 3.132e-08 1.745e-08
15-150 3.388e-08 1.910e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-74.1875 -200)
Norm : 2.11504 (-0.880401 0.880401)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.17 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 57 degrees of freedom
# Null hypothesis probability = 4.686304e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.696e-09 1.800e-09
25- 50 5.186e-09 3.325e-09
50-150 1.137e-08 7.311e-09
15-150 1.925e-08 1.250e-08
Double BB
R1^2/D10^2 : 1.86498E-04 (-0.000185778 0.00813194)
kT2 [keV] : 19.7062 (-19.6347 -19.6347)
R2^2/D10^2 : 1.08686E-02 (-0.0110352 1.79634)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.75 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.34 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.25 using 59 PHA bins.
# Reduced chi-squared = 0.7592 for 55 degrees of freedom
# Reduced chi-squared = 0.7517 for 55 degrees of freedom
# Reduced chi-squared = 0.7501 for 55 degrees of freedom
# Null hypothesis probability = 9.059906e-01
# Null hypothesis probability = 9.136728e-01
# Null hypothesis probability = 9.153095e-01
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:
Thu Mar 28 17:18:44 EDT 2019