batgrbproduct Analysis for Trigger=547918
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): Thu Feb 7 16:51:45 EST 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger547918/GCN5_download_cron
======================================================================
Trigger: 00547918 Segment: 000
BAT Trigger Time: 381872198.784 [s; MET]
Trigger Stop: 381872200.832 [s; MET]
UTC: 2013-02-06T19:36:28.596780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 140.374791824771 Dec: -58.1604827693569 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.15
Image Trigger?: NO
Rate S/N Ratio: 14.3527000944073 [ if not an image trigger ]
Image S/N Ratio: 8.15
Flight Position: [ source = BAT ]
RA: 140.374791824771 Dec: -58.1604827693569 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 140.378554701087 Dec: -58.1997107090987 [deg; J2000]
{ 09h 21m 30.9s , -58d 11' 59.0" }
+/- 1.54423195343065 [arcmin] (estimated 90% radius based on SNR)
+/- 0.533789429047596 [arcmin] (formal 1-sigma fit error)
SNR: 16.3504249575885
Angular difference between Flight and Ground position is 2.356685 arcmin
Partial Coding Fraction: 0.5234375 [ including projection effects ]
Duration
T90: 121 +/- 32.3882694814033
Measured from: -4.78399986028671
to: 116.216000139713 [s; relative to TRIGTIME]
T50: 44 +/- 8.06225774829855
Measured from: 6.21600013971329
to: 50.2160001397133 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.216000020504
to: 2.216000020504 [s; relative to TRIGTIME]
Total Fluence
Measured from: -8.783999979496
to: 147.216000020504 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.002387 1.061719 0.941292 0.144792
0.094267 0.094693 0.083463 0.075620 [error]
Peak 0.034055 0.042922 0.024422 0.012193
0.007978 0.008371 0.007583 0.006586 [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 2.87e-07 5.03e-07 6.73e-07 1.85e-06 1.96e-06 3.31e-06 erg/cm2
Error 4.44e-08 4.67e-08 8.50e-08 5.05e-07 2.01e-07 5.70e-07 erg/cm2
Peak flux Power-law 3.20e-01 2.94e-01 1.87e-01 1.82e-01 8.76e-01 9.82e-01 ph/cm2/s
Error 1.12e-01 6.89e-02 6.05e-02 1.17e-01 2.03e-01 2.33e-01 ph/cm2/s
Fluence Cutoff-PL 2.88e-07 5.04e-07 6.72e-07 1.82e-06 1.96e-06 0.00e+00 erg/cm2
Error 4.66e-08 4.97e-08 8.62e-08 7.06e-07 1.56e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 3.06e-01 3.19e-01 1.85e-01 1.17e-03 8.59e-01 8.84e-01 ph/cm2/s
Error 1.19e-01 9.22e-02 4.13e-02 2.06e-01 2.63e-01 0.00e+00 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 1.41e-01 8.87e-01 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 1.580 0.166 - - 1.35e-03 1.27e-04 0.000 57
CPL 1.581 0.568 9999.1 0.0 1.35e-03 9.40e-04 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.655 0.397 - - 6.70e-03 1.71e-03 0.000 57
CPL 1.045 1.926 64.9 -7.2 1.53e-02 3.70e-01 0.000 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: 59.776000 sec.
T50 in the 50-300 keV band: 37.632000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 156.000 -8.784 147.216
T90 121.000 -4.784 116.216
T50 44.000 6.216 50.216
Peak 1.000 1.216 2.216
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
140.3786 -58.1997 0.0118 30.6 36.8 3.7668 16.4 TRIG_00547918
------------------------------------------
Foreground time interval of the image:
-8.784 110.816 (delta_t = 119.600 [sec])
112.216 147.216 (delta_t = 35.000 [sec])
Background time interval of the image:
-239.784 -8.784 (delta_t = 231.000 [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
Multiple GTIs in the spectrum
tstart tstop
-8.784000 110.816000
112.216000 147.216000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.57989 ( -0.165462 0.167298 )
Norm@50keV : 1.35115E-03 ( -0.000127579 0.00012643 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 58.46 using 59 PHA bins.
# Reduced chi-squared = 1.026 for 57 degrees of freedom
# Null hypothesis probability = 4.214477e-01
Photon flux (15-150 keV) in 154.6 sec: 0.172565 ( -0.0158039 0.0158367 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95849e-06 ( -2.0002e-07 2.02144e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-8.784000 110.816000
112.216000 147.216000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58148 ( -0.550202 0.586367 )
Epeak [keV] : 9999.07 ( -9999.35 -9999.35 )
Norm@50keV : 1.34810E-03 ( -0.000717776 0.00116169 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 58.47 using 59 PHA bins.
# Reduced chi-squared = 1.044 for 56 degrees of freedom
# Null hypothesis probability = 3.847660e-01
Photon flux (15-150 keV) in 154.6 sec: 0.172582 ( -0.015866 0.015743 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.95628e-06 ( -1.09472e-07 2.0299e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
-8.784000 110.816000
112.216000 147.216000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.88740 ( -4.8874 -4.8874 )
beta : -1.61708 ( -0.192367 0.17606 )
Epeak [keV] : 20.6209 ( -20.6209 5.26531 )
Norm@50keV : 417.516 ( -37.2336 792032 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 57.75 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.741137e-01
Photon flux (15-150 keV) in 154.6 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] : 15.0783 (-1.95468 2.2626)
R^2/D10^2 : 1.81617E-02 (-0.00697986 0.0115085)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 100.45 using 59 PHA bins.
# Reduced chi-squared = 1.7624 for 57 degrees of freedom
# Null hypothesis probability = 3.379697e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.335e-07 2.407e-08
25- 50 5.331e-07 7.367e-08
50-150 8.268e-07 1.476e-07
15-150 1.493e-06 1.819e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 198.837 (-76.3537 -198.873)
Norm : 0.697209 (-0.0622956 0.0712438)
------------------------------------------------------------
#Test statistic : Chi-Squared = 59.58 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.820596e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.685e-07 1.009e-07
25- 50 5.163e-07 2.634e-07
50-150 1.131e-06 6.055e-07
15-150 1.916e-06 9.284e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.38579 (-1.08461 1.36301)
R1^2/D10^2 : 0.525296 (-0.30784 0.82631)
kT2 [keV] : 24.6724 (-4.4034 6.80917)
R2^2/D10^2 : 2.80131E-03 (-0.00156816 0.00278362)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.54 using 59 PHA bins.
#Test statistic : Chi-Squared = 54.54 using 59 PHA bins.
# Reduced chi-squared = 0.9917 for 55 degrees of freedom
# Null hypothesis probability = 4.920733e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.096e-07 1.326e-07
25- 50 4.657e-07 1.561e-07
50-150 1.187e-06 4.646e-07
15-150 1.962e-06 6.038e-07
Peak spectrum fit
Power-law model
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65541 ( -0.390442 0.403464 )
Norm@50keV : 6.70008E-03 ( -0.0017286 0.00168682 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9816 for 57 degrees of freedom
# Null hypothesis probability = 5.144203e-01
Photon flux (15-150 keV) in 1 sec: 0.876430 ( -0.203287 0.203442 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.22807e-08 ( -1.65621e-08 1.7245e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.04510 ( -2.5098 1.34169 )
Epeak [keV] : 64.8904 ( -50.5784 -64.952 )
Norm@50keV : 1.52837E-02 ( -0.0152992 0.725644 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 55.37 using 59 PHA bins.
# Reduced chi-squared = 0.9888 for 56 degrees of freedom
# Null hypothesis probability = 4.985552e-01
Photon flux (15-150 keV) in 1 sec: 0.858605 ( -0.205374 0.206875 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.62043e-08 ( -9.85937e-09 2.84063e-08 ) ergs/cm2
Band function
Time interval is from 1.216 sec. to 2.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.34942 ( -4.35639 1.24841 )
beta : -2.24771 ( 9.37167 19.3717 )
Epeak [keV] : 29.2597 ( -33.7923 -67.3905 )
Norm@50keV : 134.313 ( -133.802 77.3798 )
------------------------------------------------------------
#Test statistic : Chi-Squared = 50.71 using 59 PHA bins.
# Reduced chi-squared = 0.9219 for 55 degrees of freedom
# Null hypothesis probability = 6.392647e-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] : 9.45849 (-2.26951 4.06448)
R^2/D10^2 : 0.517684 (-0.380009 0.958324)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared = 58.52 using 59 PHA bins.
# Reduced chi-squared = 1.027 for 57 degrees of freedom
# Null hypothesis probability = 4.194590e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.232e-09 4.479e-09
25- 50 2.117e-08 1.017e-08
50-150 9.383e-09 5.830e-09
15-150 3.979e-08 1.634e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 132.406 (-77.7851 -129.439)
Norm : 3.67408 (-0.932439 1.48866)
------------------------------------------------------------
#Test statistic : Chi-Squared = 55.41 using 59 PHA bins.
# Reduced chi-squared = 0.9722 for 57 degrees of freedom
# Null hypothesis probability = 5.347517e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.522e-09 5.575e-09
25- 50 1.732e-08 9.965e-09
50-150 3.238e-08 2.089e-08
15-150 5.922e-08 3.555e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 6.95544 (-1.83539 2.56466)
R1^2/D10^2 : 1.31629 (-0.901524 2.66358)
kT2 [keV] : 31.6967 (-15.4148 -31.6839)
R2^2/D10^2 : 4.80471E-03 (-0.00456156 0.0146289)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.61 using 59 PHA bins.
#Test statistic : Chi-Squared = 51.61 using 59 PHA bins.
# Reduced chi-squared = 0.9384 for 55 degrees of freedom
# Null hypothesis probability = 6.049309e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.089e-08 6.470e-09
25- 50 1.834e-08 1.052e-08
50-150 3.411e-08 1.979e-08
15-150 6.335e-08 3.365e-08
Plot creation:
Thu Feb 7 17:16:45 EST 2013