batgrbproduct Analysis for Trigger=423958
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 page will be updated for up to 8 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Sun Jun 6 09:10:55 EDT 2010
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger423958/SDC
======================================================================
Trigger: 00423958 Segment: 000
BAT Trigger Time: 297451416 [s; MET]
Trigger Stop: 297452760 [s; MET]
UTC: 2010-06-05T17:23:30.135280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 280.266527698273 Dec: -5.61501892311769 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.87
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.87
Flight Position: [ source = BAT ]
RA: 280.266527698273 Dec: -5.61501892311769 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 280.248127190951 Dec: -5.59496745890764 [deg; J2000]
{ 18h 40m 59.6s , -05d 35' 41.9" }
+/- 3.78488979107545 [arcmin] (estimated 90% radius based on SNR)
+/- 1.74020299223046 [arcmin] (formal 1-sigma fit error)
SNR: 4.54284626168947
Angular difference between Flight and Ground position is 1.629318 arcmin
Partial Coding Fraction: 0.6015625 [ including projection effects ]
Duration
T90: 1344 +/-
Measured from: 0
to: 1344 [s; relative to TRIGTIME]
T50: 1344 +/-
Measured from: 0
to: 1344 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1344 second)
Measured from: 0
to: 1344 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1344 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.283679 1.291367 0.204290 -0.104136
0.223654 0.216766 0.190126 0.166848 [error]
Peak 1.283679 1.291367 0.204290 -0.104136
0.223654 0.216766 0.190126 0.166848 [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 4.82e-07 4.70e-07 3.20e-07 3.42e-07 1.41e-06 1.61e-06 erg/cm2
Error 1.11e-07 1.12e-07 1.52e-07 3.07e-07 3.63e-07 5.43e-07 erg/cm2
Peak flux Power-law 1.70e-02 9.07e-03 3.02e-03 1.30e-03 2.98e-02 3.04e-02 ph/cm2/s
Error 3.55e-03 2.06e-03 1.38e-03 1.32e-03 5.51e-03 5.75e-03 ph/cm2/s
Fluence Cutoff-PL 4.54e-07 5.47e-07 2.59e-07 3.92e-08 1.29e-06 1.30e-06 erg/cm2
Error 1.26e-07 1.55e-07 1.76e-07 2.81e-07 3.44e-07 4.94e-07 erg/cm2
Peak flux Cutoff-PL 1.64e-02 1.03e-02 2.60e-03 2.62e-04 2.95e-02 2.95e-02 ph/cm2/s
Error 3.86e-03 2.80e-03 2.13e-03 1.10e-03 5.41e-03 5.46e-03 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 2.554 0.451 - - 1.44e-04 5.09e-05 63.060 57
CPL 1.141 1.781 22.0 13.6 1.12e-03 3.03e-02 61.410 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.584 0.431 - - 1.44e-04 5.08e-05 64.500 57
CPL 1.359 1.375 18.4 0.0 8.85e-04 0.00e+00 63.240 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 1344.000 0.000 1344.000
T90 1344.000 0.000 1344.000
T50 1344.000 0.000 1344.000
Peak 1344.000 0.000 1344.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
280.2481 -5.5950 0.0424 27.4 40.3 2.9779 4.5 TRIG_00423958
------------------------------------------
Foreground time interval of the image:
0.000 963.123 (delta_t = 963.123 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) 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.
- 4) 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.
- 5) 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 963.123 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55362 ( -0.406477 0.495388 )
Norm@50keV : 1.44093E-04 ( -5.07869e-05 5.09632e-05 )
------------------------------------------------------------
# Chi-Squared = 63.06 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.708782e-01
Photon flux (15-150 keV) in 963.1 sec: 2.92629E-02 ( -0.00574185 0.00574743 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40881e-06 ( -3.50331e-07 3.76442e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 963.123 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14080 ( -2.7063 0.856194 )
Epeak [keV] : 22.0250 ( -13.3685 13.7785 )
Norm@50keV : 1.11758E-03 ( -0.00111761 0.0595515 )
------------------------------------------------------------
# Chi-Squared = 61.41 using 59 PHA bins.
# Reduced chi-squared = 1.097 for 56 degrees of freedom
# Null hypothesis probability = 2.885143e-01
Photon flux (15-150 keV) in 963.1 sec: 2.85416E-02 ( -0.0056887 0.005732 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29411e-06 ( -3.09184e-07 3.78075e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 963.123 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.36884 ( 1.36875 5.34006 )
beta : -9.37167 ( 9.99999 20 )
Epeak [keV] : 19.3783 ( -8.88497 16.4451 )
Norm@50keV : 8.03511E-04 ( -0.000805207 187911 )
------------------------------------------------------------
# Chi-Squared = 61.44 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.563844e-01
Photon flux (15-150 keV) in 963.1 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] : 7.76608 (-1.54227 1.79299)
R^2/D10^2 : 3.67858E-02 (-0.0209529 0.0537139)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 64.13 using 59 PHA bins.
# Reduced chi-squared = 1.125 for 57 degrees of freedom
# Null hypothesis probability = 2.408127e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.776e-07 1.691e-07
25- 50 6.273e-07 2.315e-07
50-150 1.493e-07 9.139e-08
15-150 1.154e-06 3.866e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.1612 (-11.3203 19.8891)
Norm : 0.230267 (-0.0759052 0.128953)
------------------------------------------------------------
# Chi-Squared = 61.46 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 57 degrees of freedom
# Null hypothesis probability = 3.192844e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.600e-07 1.227e-07
25- 50 5.366e-07 1.948e-07
50-150 3.087e-07 2.048e-07
15-150 1.305e-06 4.665e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.07345 (-1.1863 1.95369)
R1^2/D10^2 : 13.6372 (-19.2077 73691.3)
kT2 [keV] : 9.29500 (-1.98723 2.91195)
R2^2/D10^2 : 1.56374E-02 (-0.0113541 0.0292931)
------------------------------------------------------------
# Chi-Squared = 58.51 using 59 PHA bins.
# Reduced chi-squared = 1.064 for 55 degrees of freedom
# Null hypothesis probability = 3.477452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.223e-07 2.033e-07
25- 50 5.802e-07 3.343e-07
50-150 2.418e-07 1.798e-07
15-150 1.244e-06 6.939e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 963.123 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.58450 ( -0.386524 0.475231 )
Norm@50keV : 1.43738E-04 ( -5.04923e-05 5.10185e-05 )
------------------------------------------------------------
# Chi-Squared = 64.50 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 57 degrees of freedom
# Null hypothesis probability = 2.309037e-01
Photon flux (15-150 keV) in 963.1 sec: 2.97630E-02 ( -0.00550372 0.00551677 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41813e-06 ( -3.46642e-07 3.73506e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 963.123 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35915 ( -2.10025 0.649382 )
Epeak [keV] : 18.3817 ( )
Norm@50keV : 8.85048E-04 ( )
------------------------------------------------------------
# Chi-Squared = 63.24 using 59 PHA bins.
# Reduced chi-squared = 1.129 for 56 degrees of freedom
# Null hypothesis probability = 2.361724e-01
Photon flux (15-150 keV) in 963.1 sec: 2.94777E-02 ( -0.0053794 0.0054331 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32288e-06 ( -3.10966e-07 3.78084e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 963.123 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.58370 ( 1.5837 1.5837 )
beta : -9.37166 ( 9.99998 20 )
Epeak [keV] : 14.4138 ( -14.4138 17.0302 )
Norm@50keV : 6.44386E-04 ( -0.000644386 1986.11 )
------------------------------------------------------------
# Chi-Squared = 63.23 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 55 degrees of freedom
# Null hypothesis probability = 2.084529e-01
Photon flux (15-150 keV) in 963.1 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] : 7.33874 (-1.46017 1.6637)
R^2/D10^2 : 4.77824E-02 (-0.0268496 0.069912)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 67.77 using 59 PHA bins.
# Reduced chi-squared = 1.189 for 57 degrees of freedom
# Null hypothesis probability = 1.555489e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.171e-07 1.586e-07
25- 50 6.249e-07 1.963e-07
50-150 1.225e-07 7.809e-08
15-150 1.164e-06 3.478e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 29.5036 (-10.368 17.3632)
Norm : 0.247272 (-0.0777526 0.131048)
------------------------------------------------------------
# Chi-Squared = 63.27 using 59 PHA bins.
# Reduced chi-squared = 1.110 for 57 degrees of freedom
# Null hypothesis probability = 2.645667e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.805e-07 1.211e-07
25- 50 5.440e-07 1.585e-07
50-150 2.914e-07 1.889e-07
15-150 1.316e-06 4.214e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.23299 (-1.04687 1.67005)
R1^2/D10^2 : 8.46468 (-12.9761 5183.92)
kT2 [keV] : 9.39496 (-2.04935 2.97025)
R2^2/D10^2 : 1.47954E-02 (-0.0111885 0.0291624)
------------------------------------------------------------
# Chi-Squared = 60.18 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.939450e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.389e-07 2.319e-07
25- 50 5.761e-07 3.384e-07
50-150 2.465e-07 1.847e-07
15-150 1.261e-06 6.775e-07
Plot creation:
Sun Jun 6 10:30:05 EDT 2010