batgrbproduct Analysis for Trigger=633173
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 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Mon Mar 2 10:16:03 EST 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger633173/GCN5_download_cron
======================================================================
Trigger: 00633173 Segment: 000
BAT Trigger Time: 446925544 [s; MET]
Trigger Stop: 446925608 [s; MET]
UTC: 2015-03-01T17:58:50.747880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 139.479621092628 Dec: -22.4372801335003 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.16
Flight Position: [ source = BAT ]
RA: 139.479621092628 Dec: -22.4372801335003 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 139.475785120604 Dec: -22.4887246121291 [deg; J2000]
{ 09h 17m 54.2s , -22d 29' 19.4" }
+/- 5.80148190758344 [arcmin] (estimated 90% radius based on SNR)
+/- 3.70320604988726 [arcmin] (formal 1-sigma fit error)
SNR: 2.46801879416222
Angular difference between Flight and Ground position is 3.093988 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.142392 0.084984 -0.029118 -0.054358
0.040490 0.041751 0.036934 0.033375 [error]
Peak 0.142392 0.084984 -0.029118 -0.054358
0.040490 0.041751 0.036934 0.033375 [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 3.46e-08 3.38e-08 2.31e-08 2.49e-08 1.02e-07 1.18e-07 erg/cm2
Error 1.75e-08 1.92e-08 2.57e-08 5.46e-08 6.17e-08 9.37e-08 erg/cm2
Peak flux Power-law 1.78e-02 9.76e-03 3.35e-03 1.49e-03 3.17e-02 3.24e-02 ph/cm2/s
Error 9.12e-03 5.35e-03 3.61e-03 2.96e-03 1.51e-02 1.57e-02 ph/cm2/s
Fluence Cutoff-PL 3.39e-08 5.22e-08 6.84e-09 1.36e-11 9.29e-08 9.28e-08 erg/cm2
Error 2.03e-08 4.11e-08 1.63e-08 4.74e-09 4.45e-08 4.46e-08 erg/cm2
Peak flux Cutoff-PL 1.67e-02 1.53e-02 1.15e-03 1.25e-06 3.31e-02 3.31e-02 ph/cm2/s
Error 1.04e-02 1.18e-02 2.46e-03 3.49e-04 1.40e-02 1.40e-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 2.527 0.993 - - 1.59e-04 1.21e-04 86.770 57
CPL -2.404 0.000 28.4 19.4 3.47e-01 1.12e+06 83.300 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.527 0.993 - - 1.59e-04 1.21e-04 86.770 57
CPL -2.404 0.000 28.4 19.4 3.47e-01 1.12e+06 83.300 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
139.4758 -22.4887 0.0779 28.1 -10.4 0.3137 2.5 TRIG_00633173
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52727 ( -0.820224 1.16658 )
Norm@50keV : 1.59068E-04 ( -0.000112962 0.000128284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.77 using 59 PHA bins.
# Reduced chi-squared = 1.522 for 57 degrees of freedom
# Null hypothesis probability = 6.717154e-03
Photon flux (15-150 keV) in 64 sec: 3.17323E-02 ( -0.0149962 0.0151793 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01559e-07 ( -5.57464e-08 6.76461e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.40432 ( )
Epeak [keV] : 28.4050 ( -28.428 10.3448 )
Norm@50keV : 0.347004 ( -0.406405 2.2461e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.30 using 59 PHA bins.
# Reduced chi-squared = 1.488 for 56 degrees of freedom
# Null hypothesis probability = 1.041295e-02
Photon flux (15-150 keV) in 64 sec: 3.31406E-02 ( -0.0138945 0.0140505 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.29472e-08 ( -4.35137e-08 4.55437e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.62143 ( -2.97537 -4.62143 )
beta : -9.99030 ( 9.9903 19.953 )
Epeak [keV] : 28.5504 ( -8.16114 9.75536 )
Norm@50keV : 11.8608 ( -4.91344 195.594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.46 using 59 PHA bins.
# Reduced chi-squared = 1.517 for 55 degrees of freedom
# Null hypothesis probability = 7.951609e-03
Photon flux (15-150 keV) in 64 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] : 7.17403 (-2.31732 2.88996)
R^2/D10^2 : 6.46113E-02 (-0.0646073 0.249627)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.42 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 57 degrees of freedom
# Null hypothesis probability = 1.284480e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.505e-08 2.225e-08
25- 50 5.031e-08 3.312e-08
50-150 9.105e-09 7.642e-09
15-150 9.446e-08 6.314e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1524 (-14.4496 48.9768)
Norm : 0.305939 (-0.17945 0.44919)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.24 using 59 PHA bins.
# Reduced chi-squared = 1.495 for 57 degrees of freedom
# Null hypothesis probability = 9.060830e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.689e-08 2.297e-08
25- 50 3.890e-08 2.586e-08
50-150 1.766e-08 1.639e-08
15-150 9.345e-08 6.502e-08
Double BB
R1^2/D10^2 : 3.91812E+07 ( )
kT2 [keV] : 7.23385 (-2.35249 3.06688)
R2^2/D10^2 : 6.18116E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.42 using 59 PHA bins.
#Fit statistic : Chi-Squared = 83.40 using 59 PHA bins.
#Fit statistic : Chi-Squared = 83.38 using 59 PHA bins.
# Reduced chi-squared = 1.517 for 55 degrees of freedom
# Reduced chi-squared = 1.516 for 55 degrees of freedom
# Reduced chi-squared = 1.516 for 55 degrees of freedom
# Null hypothesis probability = 8.014113e-03
# Null hypothesis probability = 8.036128e-03
# Null hypothesis probability = 8.069741e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.510e-08 2.789e-02
25- 50 5.029e-08 2.425e-01
50-150 9.086e-09 6.323e+00
15-150 9.447e-08 5.917e+00
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.52727 ( -0.820224 1.16658 )
Norm@50keV : 1.59068E-04 ( -0.000112962 0.000128284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 86.77 using 59 PHA bins.
# Reduced chi-squared = 1.522 for 57 degrees of freedom
# Null hypothesis probability = 6.717154e-03
Photon flux (15-150 keV) in 64 sec: 3.17323E-02 ( -0.0149962 0.0151793 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.01559e-07 ( -5.57464e-08 6.76461e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.40432 ( )
Epeak [keV] : 28.4050 ( -28.428 10.3448 )
Norm@50keV : 0.347004 ( -0.406405 2.2461e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.30 using 59 PHA bins.
# Reduced chi-squared = 1.488 for 56 degrees of freedom
# Null hypothesis probability = 1.041295e-02
Photon flux (15-150 keV) in 64 sec: 3.31406E-02 ( -0.0138945 0.0140505 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.29472e-08 ( -4.35137e-08 4.55437e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.62143 ( -2.97537 -4.62143 )
beta : -9.99030 ( 9.9903 19.953 )
Epeak [keV] : 28.5504 ( -8.16114 9.75536 )
Norm@50keV : 11.8608 ( -4.91344 195.594 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.46 using 59 PHA bins.
# Reduced chi-squared = 1.517 for 55 degrees of freedom
# Null hypothesis probability = 7.951609e-03
Photon flux (15-150 keV) in 64 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] : 7.17403 (-2.31732 2.88996)
R^2/D10^2 : 6.46113E-02 (-0.0646073 0.249627)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.42 using 59 PHA bins.
# Reduced chi-squared = 1.463 for 57 degrees of freedom
# Null hypothesis probability = 1.284480e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.505e-08 2.218e-08
25- 50 5.031e-08 3.235e-08
50-150 9.105e-09 8.816e-09
15-150 9.446e-08 5.939e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.1524 (-14.4496 48.9768)
Norm : 0.305939 (-0.17945 0.44919)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 85.24 using 59 PHA bins.
# Reduced chi-squared = 1.495 for 57 degrees of freedom
# Null hypothesis probability = 9.060830e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.689e-08 2.432e-08
25- 50 3.890e-08 2.602e-08
50-150 1.766e-08 1.745e-08
15-150 9.345e-08 6.458e-08
Double BB
R1^2/D10^2 : 3.91812E+07 ( )
kT2 [keV] : 7.23385 (-2.35249 3.06688)
R2^2/D10^2 : 6.18116E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.42 using 59 PHA bins.
#Fit statistic : Chi-Squared = 83.40 using 59 PHA bins.
#Fit statistic : Chi-Squared = 83.38 using 59 PHA bins.
# Reduced chi-squared = 1.517 for 55 degrees of freedom
# Reduced chi-squared = 1.516 for 55 degrees of freedom
# Reduced chi-squared = 1.516 for 55 degrees of freedom
# Null hypothesis probability = 8.014113e-03
# Null hypothesis probability = 8.036128e-03
# Null hypothesis probability = 8.069741e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.510e-08 2.614e-02
25- 50 5.029e-08 2.294e-01
50-150 9.086e-09 5.939e+00
15-150 9.447e-08 5.827e+00
Plot creation:
Mon Mar 2 10:19:47 EST 2015