batgrbproduct Analysis for Trigger=500093
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): Fri Aug 12 13:38:25 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger500093/GCN5_download_cron
======================================================================
Trigger: 00500093 Segment: 000
BAT Trigger Time: 334820440 [s; MET]
Trigger Stop: 334820760 [s; MET]
UTC: 2011-08-12T05:40:32.748180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 274.024187016048 Dec: -14.0027441116707 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.08
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.08
Flight Position: [ source = BAT ]
RA: 274.024187016048 Dec: -14.0027441116707 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 274.004997233551 Dec: -14.02853418967 [deg; J2000]
{ 18h 16m 01.2s , -14d 01' 42.7" }
+/- 2.66241286688693 [arcmin] (estimated 90% radius based on SNR)
+/- 1.40537587115644 [arcmin] (formal 1-sigma fit error)
SNR: 7.50899974041741
Angular difference between Flight and Ground position is 1.908506 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.323153 0.110145 0.125377 0.022261
0.092016 0.086181 0.073970 0.064265 [error]
Peak 1.323153 0.110145 0.125377 0.022261
0.092016 0.086181 0.073970 0.064265 [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 3.64e-07 8.67e-08 1.07e-08 1.47e-09 4.62e-07 4.63e-07 erg/cm2
Error 5.48e-08 3.72e-08 1.08e-08 3.00e-09 8.07e-08 8.12e-08 erg/cm2
Peak flux Power-law 3.95e-02 5.46e-03 3.37e-04 2.20e-05 4.53e-02 4.53e-02 ph/cm2/s
Error 6.04e-03 2.22e-03 3.29e-04 4.27e-05 6.91e-03 6.91e-03 ph/cm2/s
Fluence Cutoff-PL 3.75e-07 6.58e-08 6.66e-10 7.95e-14 4.41e-07 4.41e-07 erg/cm2
Error 5.73e-08 4.49e-08 1.07e-08 7.72e-10 5.81e-08 5.77e-08 erg/cm2
Peak flux Cutoff-PL 3.95e-02 5.45e-03 3.35e-04 1.37e-05 1.27e-05 4.53e-02 ph/cm2/s
Error 6.03e-03 2.22e-03 3.28e-04 6.91e-03 6.91e-03 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 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 5.019 0.769 - - 2.88e-05 2.27e-05 56.840 57
CPL 1.000 0.000 50.0 0.0 5.48e-04 0.00e+00 135.320 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.019 0.769 - - 2.88e-05 2.27e-05 56.840 57
CPL 1.000 0.000 50.0 0.0 5.48e-04 0.00e+00 135.320 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
274.0050 -14.0285 0.0257 7.0 -141.7 1.5186 7.5 TRIG_00500093
------------------------------------------
Foreground time interval of the image:
0.000 311.010 (delta_t = 311.010 [sec])
312.000 320.000 (delta_t = 8.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 311.010000
312.000000 320.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.01928 ( -0.710382 0.828597 )
Norm@50keV : 2.88370E-05 ( -1.67578e-05 2.86309e-05 )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 0.9972 for 57 degrees of freedom
# Null hypothesis probability = 4.810211e-01
Photon flux (15-150 keV) in 319 sec: 4.53237E-02 ( -0.00690659 0.0069191 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.621e-07 ( -7.88029e-08 8.25744e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 311.010000
312.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.48469E-04 ( )
------------------------------------------------------------
# Chi-Squared = 135.32 using 59 PHA bins.
# Reduced chi-squared = 2.4164 for 56 degrees of freedom
# Null hypothesis probability = 1.632382e-08
Photon flux (15-150 keV) in 319 sec: 4.52812E-02 ( -0.0069007 0.006916 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41333e-07 ( -7.1137e-08 4.51034e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 311.010000
312.000000 320.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.86019 ( 1.638 6.82409 )
beta : -5.01400 ( -0.842388 0.69586 )
Epeak [keV] : 462.727 ( -462.727 -462.727 )
Norm@50keV : 3.93971E-03 ( -0.00229834 0.00386849 )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.063053e-01
Photon flux (15-150 keV) in 319 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] : 2.96791 (-0.445214 0.515409)
R^2/D10^2 : 6.79565 (-4.30833 13.7567)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.29 using 59 PHA bins.
# Reduced chi-squared = 0.9875 for 57 degrees of freedom
# Null hypothesis probability = 5.017928e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.790e-07 2.059e-07
25- 50 5.319e-08 3.174e-08
50-150 7.848e-11 7.748e-11
15-150 4.322e-07 2.162e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.84848 (-1.32057 1.80725)
Norm : 6.11411 (-3.30781 8.68327)
------------------------------------------------------------
# Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9796 for 57 degrees of freedom
# Null hypothesis probability = 5.188169e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.750e-07 1.833e-07
25- 50 6.627e-08 3.429e-08
50-150 7.156e-10 6.923e-10
15-150 4.420e-07 1.820e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.93111 (-0.449919 0.509477)
R1^2/D10^2 : 7.30125 (-4.73118 15.6185)
kT2 [keV] : 52.3460 (-49.0074 -49.0074)
R2^2/D10^2 : 1.63231E-05 (-1.82677e-05 12.578)
------------------------------------------------------------
# Chi-Squared = 54.46 using 59 PHA bins.
# Reduced chi-squared = 0.9903 for 55 degrees of freedom
# Null hypothesis probability = 4.950460e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.779e-07 2.059e-07
25- 50 6.152e-08 2.916e-08
50-150 1.401e-07 9.910e-08
15-150 5.795e-07 2.866e-07
Peak spectrum fit
Power-law model
Time interval is from 312.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.01928 ( -0.710382 0.828597 )
Norm@50keV : 2.88370E-05 ( -1.67578e-05 2.86309e-05 )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 0.9972 for 57 degrees of freedom
# Null hypothesis probability = 4.810211e-01
Photon flux (15-150 keV) in 319 sec: 4.53237E-02 ( -0.00690659 0.0069191 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.621e-07 ( -7.88029e-08 8.25744e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 312.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 5.48469E-04 ( )
------------------------------------------------------------
# Chi-Squared = 135.32 using 59 PHA bins.
# Reduced chi-squared = 2.4164 for 56 degrees of freedom
# Null hypothesis probability = 1.632382e-08
Photon flux (15-150 keV) in 319 sec: 4.52812E-02 ( -0.0069007 0.006916 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41333e-07 ( -7.1137e-08 4.51034e-08 ) ergs/cm2
Band function
Time interval is from 312.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -8.86019 ( 1.638 6.82409 )
beta : -5.01400 ( -0.842388 0.69586 )
Epeak [keV] : 462.727 ( -462.727 -462.727 )
Norm@50keV : 3.93971E-03 ( -0.00229834 0.00386849 )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.033 for 55 degrees of freedom
# Null hypothesis probability = 4.063053e-01
Photon flux (15-150 keV) in 319 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] : 2.96791 (-0.445214 0.515409)
R^2/D10^2 : 6.79565 (-4.30833 13.7567)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 56.29 using 59 PHA bins.
# Reduced chi-squared = 0.9875 for 57 degrees of freedom
# Null hypothesis probability = 5.017928e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.790e-07 1.726e-07
25- 50 5.319e-08 3.195e-08
50-150 7.848e-11 7.755e-11
15-150 4.322e-07 1.863e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.84848 (-1.32057 1.80725)
Norm : 6.11411 (-3.30781 8.68327)
------------------------------------------------------------
# Chi-Squared = 55.84 using 59 PHA bins.
# Reduced chi-squared = 0.9796 for 57 degrees of freedom
# Null hypothesis probability = 5.188169e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.750e-07 1.700e-07
25- 50 6.627e-08 3.520e-08
50-150 7.156e-10 7.194e-10
15-150 4.420e-07 2.048e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.93111 (-0.449919 0.509477)
R1^2/D10^2 : 7.30125 (-4.73118 15.6185)
kT2 [keV] : 52.3460 (-49.0074 -49.0074)
R2^2/D10^2 : 1.63231E-05 (-1.82677e-05 12.578)
------------------------------------------------------------
# Chi-Squared = 54.46 using 59 PHA bins.
# Reduced chi-squared = 0.9903 for 55 degrees of freedom
# Null hypothesis probability = 4.950460e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.779e-07 1.653e-07
25- 50 6.152e-08 2.907e-08
50-150 1.401e-07 1.011e-07
15-150 5.795e-07 2.608e-07
Plot creation:
Fri Aug 12 13:52:12 EDT 2011