batgrbproduct Analysis for Trigger=558271
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): Sat Jun 15 19:39:11 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger558271/GCN5_download_cron
======================================================================
Trigger: 00558271 Segment: 000
BAT Trigger Time: 392982296 [s; MET]
Trigger Stop: 392982360 [s; MET]
UTC: 2013-06-15T09:44:45.323280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 274.845688282276 Dec: -68.1660059730103 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7
Flight Position: [ source = BAT ]
RA: 274.845688282276 Dec: -68.1660059730103 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.963412511099 Dec: -68.1610181378146 [deg; J2000]
{ 18h 19m 51.2s , -68d 09' 39.7" }
+/- 2.92715273194432 [arcmin] (estimated 90% radius based on SNR)
+/- 1.77770771515029 [arcmin] (formal 1-sigma fit error)
SNR: 6.55794593810714
Angular difference between Flight and Ground position is 2.644305 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 304.259999930859 +/- 30.1397197553089
Measured from: 32.740000128746
to: 337.000000059605 [s; relative to TRIGTIME]
T50: 161.13999992609 +/- 98.4624022521186
Measured from: 82.5000001192093
to: 243.6400000453 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 31.8439999818802
to: 32.8439999818802 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.5720000267029
to: 386.864000022411 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.652232 1.865056 0.752911 0.202766
0.133666 0.128944 0.108800 0.093942 [error]
Peak 0.018999 0.048000 0.007990 0.006990
0.009784 0.009431 0.007746 0.006369 [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 6.21e-07 7.56e-07 6.68e-07 1.02e-06 2.40e-06 3.06e-06 erg/cm2
Error 7.27e-08 6.51e-08 1.00e-07 2.94e-07 2.35e-07 4.16e-07 erg/cm2
Peak flux Power-law 3.35e-01 2.45e-01 1.19e-01 8.19e-02 7.38e-01 7.81e-01 ph/cm2/s
Error 1.50e-01 7.99e-02 5.94e-02 9.13e-02 2.42e-01 2.55e-01 ph/cm2/s
Fluence Cutoff-PL 5.70e-07 8.69e-07 5.76e-07 2.13e-06 0.00e+00 0.00e+00 erg/cm2
Error 8.15e-08 9.47e-08 1.41e-07 2.61e-07 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.43e-01 3.65e-01 3.65e-02 3.12e-05 6.45e-01 6.46e-01 ph/cm2/s
Error 1.72e-01 1.38e-01 8.13e-02 2.77e-02 2.49e-01 2.49e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.178 0.159 - - 7.09e-04 7.79e-05 70.230 57
CPL 0.870 0.921 33.2 8.6 4.37e-03 9.40e-03 61.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.043 0.580 - - 4.82e-03 1.90e-03 52.640 57
CPL -6.851 0.000 32.4 115.4 2.87e+03 0.00e+00 50.310 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: 80.768000 sec.
T50 in the 50-300 keV band: 70.016000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 361.292 25.572 386.864
T90 304.260 32.740 337.000
T50 161.140 82.500 243.640
Peak 1.000 31.844 32.844
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.9634 -68.1610 0.0293 39.4 -12.8 1.1569 6.6 TRIG_00558271
------------------------------------------
Foreground time interval of the image:
25.572 73.301 (delta_t = 47.729 [sec])
Background time interval of the image:
-13.599 25.572 (delta_t = 39.171 [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 25.572 sec. to 386.864 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.17838 ( -0.155417 0.162702 )
Norm@50keV : 7.08527E-04 ( -7.8515e-05 7.73768e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 70.23 using 59 PHA bins.
# Reduced chi-squared = 1.232 for 57 degrees of freedom
# Null hypothesis probability = 1.121064e-01
Photon flux (15-150 keV) in 361.3 sec: 0.115982 ( -0.00994355 0.00995047 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.39978e-06 ( -2.33592e-07 2.37016e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.572 sec. to 386.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.869507 ( -1.02312 0.818942 )
Epeak [keV] : 33.2255 ( -10.8289 6.29142 )
Norm@50keV : 4.37087E-03 ( -0.00437247 0.014428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.91 using 59 PHA bins.
# Reduced chi-squared = 1.105 for 56 degrees of freedom
# Null hypothesis probability = 2.735255e-01
Photon flux (15-150 keV) in 361.3 sec: 0.110979 ( -0.010304 0.010351 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.12797e-06 ( -2.50135e-07 2.72576e-07 ) ergs/cm2
Band function
Time interval is from 25.572 sec. to 386.864 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.19462 ( -4.83804 -3.74853 )
beta : -2.56272 ( -0.410507 0.278133 )
Epeak [keV] : 26.3702 ( -3.57449 9.61211 )
Norm@50keV : 4.89477 ( -4.89401 43.0463 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.84 using 59 PHA bins.
# Reduced chi-squared = 1.070 for 55 degrees of freedom
# Null hypothesis probability = 3.367926e-01
Photon flux (15-150 keV) in 361.3 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] : 8.78136 (-0.784427 0.868841)
R^2/D10^2 : 8.90083E-02 (-0.0281981 0.0409865)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 74.22 using 59 PHA bins.
# Reduced chi-squared = 1.302 for 57 degrees of freedom
# Null hypothesis probability = 6.233288e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.764e-07 6.811e-08
25- 50 9.741e-07 9.629e-08
50-150 3.445e-07 8.543e-08
15-150 1.795e-06 1.812e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 47.8679 (-9.41524 13.2978)
Norm : 0.676725 (-0.0959703 0.119561)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.848257e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.916e-07 6.413e-08
25- 50 8.364e-07 7.876e-08
50-150 7.789e-07 1.718e-07
15-150 2.207e-06 2.363e-07
Double BB
R1^2/D10^2 : 0.219142 ( )
kT2 [keV] : 19.0620 (-6.49852 27.8121)
R2^2/D10^2 : 2.07196E-03 (-0.00196069 0.0121421)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 60.73 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.07 using 59 PHA bins.
#Fit statistic : Chi-Squared = 59.01 using 59 PHA bins.
# Reduced chi-squared = 1.104 for 55 degrees of freedom
# Reduced chi-squared = 1.074 for 55 degrees of freedom
# Reduced chi-squared = 1.073 for 55 degrees of freedom
# Null hypothesis probability = 2.771209e-01
# Null hypothesis probability = 3.291313e-01
# Null hypothesis probability = 3.310549e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.590e-07 3.082e-07
25- 50 8.314e-07 4.437e-07
50-150 6.175e-07 3.685e-07
15-150 2.008e-06 1.058e-06
Peak spectrum fit
Power-law model
Time interval is from 31.844 sec. to 32.844 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.04259 ( -0.539387 0.620554 )
Norm@50keV : 4.82252E-03 ( -0.00194399 0.00186236 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.64 using 59 PHA bins.
# Reduced chi-squared = 0.9235 for 57 degrees of freedom
# Null hypothesis probability = 6.392878e-01
Photon flux (15-150 keV) in 1 sec: 0.737904 ( -0.241907 0.24236 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.45935e-08 ( -1.61908e-08 1.69246e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 31.844 sec. to 32.844 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -6.85100 ( )
Epeak [keV] : 32.4325 ( -5.17229 225.659 )
Norm@50keV : 2870.25 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.31 using 59 PHA bins.
# Reduced chi-squared = 0.8984 for 56 degrees of freedom
# Null hypothesis probability = 6.890603e-01
Photon flux (15-150 keV) in 1 sec: 0.645341 ( -0.234743 0.26291 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.13642e-08 ( -1.16808e-08 2.10513e-08 ) ergs/cm2
Band function
Time interval is from 31.844 sec. to 32.844 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -5 -5 )
beta : -3.26923 ( 3.26923 1.2556 )
Epeak [keV] : 31.5459 ( -9.3512 7.88016 )
Norm@50keV : 217.678 ( -66.5201 1685.04 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.16 using 59 PHA bins.
# Reduced chi-squared = 0.8937 for 55 degrees of freedom
# Null hypothesis probability = 6.964035e-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] : 8.84185 (-2.21806 3.21796)
R^2/D10^2 : 0.596446 (-0.596446 1.27612)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
# Reduced chi-squared = 0.8861 for 57 degrees of freedom
# Null hypothesis probability = 7.154760e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.993e-09 5.515e-09
25- 50 1.859e-08 1.174e-08
50-150 6.715e-09 5.035e-09
15-150 3.430e-08 2.124e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 54.3089 (-29.1977 135.152)
Norm : 4.11239 (-1.76813 3.22885)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.76 using 59 PHA bins.
# Reduced chi-squared = 0.9081 for 57 degrees of freedom
# Null hypothesis probability = 6.713644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-08 6.650e-09
25- 50 1.512e-08 1.114e-08
50-150 1.584e-08 1.951e-08
15-150 4.119e-08 3.751e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 198.079 ( )
R1^2/D10^2 : 4.26358E-05 (-4.20373e-05 -4.20373e-05)
kT2 [keV] : 8.34019 (-8.33906 2.96828)
R2^2/D10^2 : 0.718204 (-0.719651 1.79607)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 50.51 using 59 PHA bins.
#Fit statistic : Chi-Squared = 49.27 using 59 PHA bins.
# Reduced chi-squared = 0.9184 for 55 degrees of freedom
# Reduced chi-squared = 0.8958 for 55 degrees of freedom
# Null hypothesis probability = 6.466383e-01
# Null hypothesis probability = 6.922878e-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:
Sat Jun 15 19:59:14 EDT 2013