batgrbproduct Analysis for Trigger=556344
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): Wed May 22 17:10:33 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger556344/GCN5_download_cron
======================================================================
Trigger: 00556344 Segment: 000
BAT Trigger Time: 390869367.36 [s; MET]
Trigger Stop: 390869368.384 [s; MET]
UTC: 2013-05-21T22:49:16.777540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 87.5593927071589 Dec: 14.4524334755583 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.11
Image Trigger?: NO
Rate S/N Ratio: 24.5153013442625 [ if not an image trigger ]
Image S/N Ratio: 12.11
Flight Position: [ source = BAT ]
RA: 87.5593927071589 Dec: 14.4524334755583 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 87.5678350931291 Dec: 14.4696619060158 [deg; J2000]
{ 05h 50m 16.3s , +14d 28' 10.8" }
+/- 1.61915254661936 [arcmin] (estimated 90% radius based on SNR)
+/- 0.757419530948479 [arcmin] (formal 1-sigma fit error)
SNR: 15.2804398393015
Angular difference between Flight and Ground position is 1.144173 arcmin
Partial Coding Fraction: 0.671875 [ including projection effects ]
Duration
T90: 10.9839999675751 +/- 2.40934512009871
Measured from: -0.327999889850616
to: 10.6560000777245 [s; relative to TRIGTIME]
T50: 3.58799993991852 +/- 1.83736331763402
Measured from: 0.468000113964081
to: 4.0560000538826 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.136000037193298
to: 0.863999962806702 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.643999993801117
to: 12.6399999856949 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.356053 0.305023 0.157603 0.035719
0.027638 0.028139 0.023729 0.019525 [error]
Peak 0.091867 0.084108 0.042991 0.011146
0.008791 0.009225 0.007477 0.005251 [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-07 1.30e-07 1.20e-07 1.95e-07 4.19e-07 5.48e-07 erg/cm2
Error 1.39e-08 1.31e-08 2.23e-08 7.06e-08 5.08e-08 9.66e-08 erg/cm2
Peak flux Power-law 9.13e-01 6.20e-01 2.76e-01 1.70e-01 1.89e+00 1.98e+00 ph/cm2/s
Error 1.43e-01 7.38e-02 5.84e-02 6.61e-02 2.20e-01 2.32e-01 ph/cm2/s
Fluence Cutoff-PL 1.01e-07 1.34e-07 1.19e-07 1.28e-07 4.09e-07 4.82e-07 erg/cm2
Error 1.47e-08 1.66e-08 2.43e-08 1.21e-07 5.82e-08 1.38e-07 erg/cm2
Peak flux Cutoff-PL 8.73e-01 6.66e-01 2.73e-01 7.95e-02 1.87e+00 1.89e+00 ph/cm2/s
Error 1.58e-01 1.01e-01 6.56e-02 1.18e-01 2.23e-01 2.45e-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 1.91e+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 2.111 0.196 - - 3.39e-03 4.55e-04 44.680 57
CPL 1.902 0.610 18.9 0.0 4.51e-03 0.00e+00 44.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.170 0.224 - - 1.16e-02 1.87e-03 42.640 57
CPL 1.603 0.708 28.7 0.0 2.51e-02 0.00e+00 41.360 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: 2.368000 sec.
T50 in the 50-300 keV band: 1.280000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 13.284 -0.644 12.640
T90 10.984 -0.328 10.656
T50 3.588 0.468 4.056
Peak 1.000 -0.136 0.864
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
87.5678 +14.4697 0.0125 23.0 -82.7 0.8196 15.3 TRIG_00556344
------------------------------------------
Foreground time interval of the image:
-0.644 12.640 (delta_t = 13.284 [sec])
Background time interval of the image:
-210.959 -0.644 (delta_t = 210.315 [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 -0.644 sec. to 12.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11103 ( -0.190025 0.201418 )
Norm@50keV : 3.39250E-03 ( -0.000460157 0.000449323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.68 using 59 PHA bins.
# Reduced chi-squared = 0.7838 for 57 degrees of freedom
# Null hypothesis probability = 8.821745e-01
Photon flux (15-150 keV) in 13.28 sec: 0.536653 ( -0.0527383 0.0527437 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.19042e-07 ( -5.026e-08 5.13868e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.644 sec. to 12.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90193 ( -0.782016 0.437789 )
Epeak [keV] : 18.9412 ( )
Norm@50keV : 4.51368E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 44.40 using 59 PHA bins.
# Reduced chi-squared = 0.7929 for 56 degrees of freedom
# Null hypothesis probability = 8.682734e-01
Photon flux (15-150 keV) in 13.28 sec: 0.532461 ( -0.054263 0.053998 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.0947e-07 ( -5.80708e-08 5.82448e-08 ) ergs/cm2
Band function
Time interval is from -0.644 sec. to 12.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.95067 ( -4.95067 -4.95067 )
beta : -2.22168 ( -0.286672 0.223747 )
Epeak [keV] : 20.5932 ( -20.5932 3.44747 )
Norm@50keV : 2025.27 ( -198.085 6.29256e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.90 using 59 PHA bins.
# Reduced chi-squared = 0.7800 for 55 degrees of freedom
# Null hypothesis probability = 8.822728e-01
Photon flux (15-150 keV) in 13.28 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] : 8.64455 (-1.09115 1.26918)
R^2/D10^2 : 0.422846 (-0.174957 0.298936)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.32 using 59 PHA bins.
# Reduced chi-squared = 1.251 for 57 degrees of freedom
# Null hypothesis probability = 9.601651e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.990e-08 1.452e-08
25- 50 1.593e-07 1.965e-08
50-150 5.363e-08 1.575e-08
15-150 2.928e-07 3.984e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 55.3986 (-14.5224 22.455)
Norm : 2.90044 (-0.486954 0.58454)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.96 using 59 PHA bins.
# Reduced chi-squared = 0.8062 for 57 degrees of freedom
# Null hypothesis probability = 8.522977e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.545e-08 1.276e-08
25- 50 1.416e-07 1.633e-08
50-150 1.505e-07 4.074e-08
15-150 3.876e-07 4.854e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.25499 (-1.11708 1.26513)
R1^2/D10^2 : 2.33856 (-1.31026 3.80102)
kT2 [keV] : 19.6908 (-5.22271 9.67822)
R2^2/D10^2 : 1.22213E-02 (-0.00945476 0.029965)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.78 using 59 PHA bins.
# Reduced chi-squared = 0.7779 for 55 degrees of freedom
# Null hypothesis probability = 8.847952e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.040e-07 3.998e-08
25- 50 1.278e-07 4.398e-08
50-150 1.760e-07 1.013e-07
15-150 4.078e-07 1.518e-07
Peak spectrum fit
Power-law model
Time interval is from -0.136 sec. to 0.864 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.17035 ( -0.213856 0.233163 )
Norm@50keV : 1.16099E-02 ( -0.00189755 0.00184169 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.64 using 59 PHA bins.
# Reduced chi-squared = 0.7481 for 57 degrees of freedom
# Null hypothesis probability = 9.213624e-01
Photon flux (15-150 keV) in 1 sec: 1.89261 ( -0.220379 0.220384 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08725e-07 ( -1.53614e-08 1.56757e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.136 sec. to 0.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.60293 ( -1.03206 0.384147 )
Epeak [keV] : 28.7088 ( )
Norm@50keV : 2.50899E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.36 using 59 PHA bins.
# Reduced chi-squared = 0.7385 for 56 degrees of freedom
# Null hypothesis probability = 9.281596e-01
Photon flux (15-150 keV) in 1 sec: 1.86835 ( -0.22312 0.22314 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04135e-07 ( -1.62948e-08 1.7036e-08 ) ergs/cm2
Band function
Time interval is from -0.136 sec. to 0.864 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.99353 ( 1.99353 1.99353 )
beta : -9.36773 ( 9.37074 19.3707 )
Epeak [keV] : 1.36824 ( -0.837633 -1.36824 )
Norm@50keV : 1.50140E-02 ( -0.00287319 0.00174437 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.90 using 59 PHA bins.
# Reduced chi-squared = 0.7618 for 55 degrees of freedom
# Null hypothesis probability = 9.031962e-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] : 9.18084 (-1.29844 1.44946)
R^2/D10^2 : 1.21994 (-0.528118 0.982151)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.85 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.437015e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.022e-08 4.440e-09
25- 50 4.432e-08 6.895e-09
50-150 1.796e-08 6.080e-09
15-150 8.251e-08 1.235e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 51.7342 (-14.0891 22.2233)
Norm : 10.6152 (-1.92893 2.54462)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.61 using 59 PHA bins.
# Reduced chi-squared = 0.7301 for 57 degrees of freedom
# Null hypothesis probability = 9.372154e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.615e-08 3.895e-09
25- 50 3.801e-08 5.220e-09
50-150 3.810e-08 1.169e-08
15-150 1.023e-07 1.910e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.17899 (-1.35928 1.79119)
R1^2/D10^2 : 18.1339 (-13.6109 101.965)
kT2 [keV] : 14.2022 (-3.09909 5.72675)
R2^2/D10^2 : 0.169948 (-0.131982 0.195859)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 40.85 using 59 PHA bins.
# Reduced chi-squared = 0.7427 for 55 degrees of freedom
# Null hypothesis probability = 9.223667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.754e-08 1.451e-08
25- 50 3.557e-08 1.856e-08
50-150 3.662e-08 2.182e-08
15-150 9.973e-08 4.684e-08
Plot creation:
Wed May 22 17:23:09 EDT 2013