batgrbproduct Analysis for Trigger=322109
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 Jul 28 11:14:15 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger322109/SDC
======================================================================
Trigger: 00322109 Segment: 000
BAT Trigger Time: 241385051.648 [s; MET]
Trigger Stop: 241385051.68 [s; MET]
UTC: 2008-08-25T19:24:08.601140 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 75.294160473552 Dec: 45.2449388678845 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.65
Image Trigger?: NO
Rate S/N Ratio: 7.34846922834953 [ if not an image trigger ]
Image S/N Ratio: 6.65
Flight Position: [ source = BAT ]
RA: 75.294160473552 Dec: 45.2449388678845 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 75.2735061355346 Dec: 45.2275120387125 [deg; J2000]
{ 05h 01m 05.6s , +45d 13' 39.0" }
+/- 3.44407779033847 [arcmin] (estimated 90% radius based on SNR)
+/- 1.91837527455203 [arcmin] (formal 1-sigma fit error)
SNR: 5.1984192887907
Angular difference between Flight and Ground position is 1.361929 arcmin
Partial Coding Fraction: 0.765625 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.002002 0.006448 0.003401 0.000083
0.000988 0.001317 0.001144 0.000825 [error]
Peak 0.002002 0.006448 0.003401 0.000083
0.000988 0.001317 0.001144 0.000825 [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 8.76e-10 1.12e-09 1.04e-09 1.71e-09 3.62e-09 4.75e-09 erg/cm2
Error 3.80e-10 3.95e-10 4.42e-10 1.19e-09 1.29e-09 1.95e-09 erg/cm2
Peak flux Power-law 8.94e-01 6.32e-01 2.95e-01 1.93e-01 1.91e+00 2.01e+00 ph/cm2/s
Error 3.92e-01 2.24e-01 1.22e-01 1.26e-01 6.91e-01 7.14e-01 ph/cm2/s
Fluence Cutoff-PL 4.96e-10 2.57e-09 1.58e-09 3.68e-11 4.69e-09 4.69e-09 erg/cm2
Error 3.88e-10 9.28e-10 1.42e-09 2.95e-10 1.62e-09 1.63e-09 erg/cm2
Peak flux Cutoff-PL 4.70e-01 1.38e+00 4.97e-01 6.54e-03 2.36e+00 2.36e+00 ph/cm2/s
Error 3.85e-01 5.01e-01 4.21e-01 4.71e-02 7.30e-01 7.31e-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 2.102 0.410 - - 1.22e-02 4.47e-03 51.400 57
CPL -4.635 -0.143 44.2 10.4 6.43e+01 0.00e+00 38.630 56
The chi2 of BB fit is 39.50 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.102 0.410 - - 1.22e-02 4.47e-03 51.400 57
CPL -4.635 -0.143 44.2 10.4 6.43e+01 0.00e+00 38.630 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
75.2735 +45.2275 0.0367 20.8 -110.6 0.0106 5.2 TRIG_00322109
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-239.648 -3.648 (delta_t = 236.000 [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
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10180 ( -0.378902 0.441465 )
Norm@50keV : 1.21573E-02 ( -0.00450676 0.00443925 )
------------------------------------------------------------
# Chi-Squared = 51.40 using 59 PHA bins.
# Reduced chi-squared = 0.9017 for 57 degrees of freedom
# Null hypothesis probability = 6.843036e-01
Photon flux (15-150 keV) in 0.032 sec: 1.91380 ( -0.689943 0.691982 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6161e-09 ( -1.29248e-09 1.29416e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.63549 ( 3.3757 3.09013 )
Epeak [keV] : 44.1540 ( -9.12718 11.7634 )
Norm@50keV : 64.2850 ( )
------------------------------------------------------------
# Chi-Squared = 38.63 using 59 PHA bins.
# Reduced chi-squared = 0.6898 for 56 degrees of freedom
# Null hypothesis probability = 9.629527e-01
Photon flux (15-150 keV) in 0.032 sec: 2.35566 ( -0.71636 0.74463 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.69184e-09 ( -1.50888e-09 1.73738e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94907 ( -49.4905 -39.4927 )
beta : -4.25406 ( 4.25406 1.42928 )
Epeak [keV] : 42.6494 ( -8.16112 9.1285 )
Norm@50keV : 114.055 ( -114.053 34.2444 )
------------------------------------------------------------
# Chi-Squared = 37.96 using 59 PHA bins.
# Reduced chi-squared = 0.6901 for 55 degrees of freedom
# Null hypothesis probability = 9.613246e-01
Photon flux (15-150 keV) in 0.032 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] : 12.5301 (-2.54077 2.77472)
R^2/D10^2 : 0.630785 (-0.356335 0.788777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.50 using 59 PHA bins.
# Reduced chi-squared = 0.6930 for 57 degrees of freedom
# Null hypothesis probability = 9.625160e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.719e-10 3.289e-10
25- 50 2.222e-09 1.116e-09
50-150 2.157e-09 1.330e-09
15-150 5.052e-09 2.276e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.1980 (-25.8771 49.7106)
Norm : 11.5267 (-4.43549 5.16211)
------------------------------------------------------------
# Chi-Squared = 47.13 using 59 PHA bins.
# Reduced chi-squared = 0.8269 for 57 degrees of freedom
# Null hypothesis probability = 8.212452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.384e-10 3.869e-10
25- 50 1.464e-09 5.765e-10
50-150 1.781e-09 1.043e-09
15-150 4.183e-09 1.668e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.50786E-02 (13.1599 -0.0950786)
R1^2/D10^2 : 289.398 (-289.398 -289.398)
kT2 [keV] : 12.5300 (-2.54077 2.77471)
R2^2/D10^2 : 0.630807 (-0.356336 0.788778)
------------------------------------------------------------
# Chi-Squared = 39.50 using 59 PHA bins.
# Reduced chi-squared = 0.7182 for 55 degrees of freedom
# Null hypothesis probability = 9.429113e-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
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.10180 ( -0.378902 0.441465 )
Norm@50keV : 1.21573E-02 ( -0.00450676 0.00443925 )
------------------------------------------------------------
# Chi-Squared = 51.40 using 59 PHA bins.
# Reduced chi-squared = 0.9017 for 57 degrees of freedom
# Null hypothesis probability = 6.843036e-01
Photon flux (15-150 keV) in 0.032 sec: 1.91380 ( -0.689943 0.691982 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.6161e-09 ( -1.29248e-09 1.29416e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.63549 ( 3.3757 3.09013 )
Epeak [keV] : 44.1540 ( -9.12718 11.7634 )
Norm@50keV : 64.2850 ( )
------------------------------------------------------------
# Chi-Squared = 38.63 using 59 PHA bins.
# Reduced chi-squared = 0.6898 for 56 degrees of freedom
# Null hypothesis probability = 9.629527e-01
Photon flux (15-150 keV) in 0.032 sec: 2.35566 ( -0.71636 0.74463 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.69184e-09 ( -1.50888e-09 1.73738e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.94907 ( -49.4918 -39.4927 )
beta : -4.25406 ( 4.25406 1.42928 )
Epeak [keV] : 42.6494 ( -8.16112 9.1285 )
Norm@50keV : 114.055 ( -114.053 34.2444 )
------------------------------------------------------------
# Chi-Squared = 37.96 using 59 PHA bins.
# Reduced chi-squared = 0.6901 for 55 degrees of freedom
# Null hypothesis probability = 9.613246e-01
Photon flux (15-150 keV) in 0.032 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] : 12.5301 (-2.54077 2.77472)
R^2/D10^2 : 0.630785 (-0.356335 0.788777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 39.50 using 59 PHA bins.
# Reduced chi-squared = 0.6930 for 57 degrees of freedom
# Null hypothesis probability = 9.625160e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.719e-10 3.258e-10
25- 50 2.222e-09 1.171e-09
50-150 2.157e-09 1.316e-09
15-150 5.052e-09 2.420e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 65.1980 (-25.8771 49.7106)
Norm : 11.5267 (-4.43549 5.16211)
------------------------------------------------------------
# Chi-Squared = 47.13 using 59 PHA bins.
# Reduced chi-squared = 0.8269 for 57 degrees of freedom
# Null hypothesis probability = 8.212452e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.384e-10 3.754e-10
25- 50 1.464e-09 5.658e-10
50-150 1.781e-09 9.720e-10
15-150 4.183e-09 1.769e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.50786E-02 (13.1599 -0.0950786)
R1^2/D10^2 : 289.398 (-289.398 -289.398)
kT2 [keV] : 12.5300 (-2.54077 2.77471)
R2^2/D10^2 : 0.630807 (-0.356336 0.788778)
------------------------------------------------------------
# Chi-Squared = 39.50 using 59 PHA bins.
# Reduced chi-squared = 0.7182 for 55 degrees of freedom
# Null hypothesis probability = 9.429113e-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:
Thu Jul 28 11:34:08 EDT 2011