batgrbproduct Analysis for Trigger=354341
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 v2.44
Process Start Time (local time): Mon Jun 8 06:46:27 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354341/GCN5_download_cron
======================================================================
Trigger: 00354341 Segment: 000
BAT Trigger Time: 266093272.784 [s; MET]
Trigger Stop: 266093272.816 [s; MET]
UTC: 2009-06-07T18:47:47.976400 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 242.623205482903 Dec: 48.4043331307916 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.73
Image Trigger?: NO
Rate S/N Ratio: 6.48074069840786 [ if not an image trigger ]
Image S/N Ratio: 5.73
Flight Position: [ source = BAT ]
RA: 242.623205482903 Dec: 48.4043331307916 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 242.630803487744 Dec: 48.3545676781051 [deg; J2000]
{ 16h 10m 31.4s , +48d 21' 16.4" }
+/- 5.07943456240115 [arcmin] (estimated 90% radius based on SNR)
+/- 2.79705122368118 [arcmin] (formal 1-sigma fit error)
SNR: 2.98408169711922
Angular difference between Flight and Ground position is 3.001241 arcmin
Partial Coding Fraction: 0.7578125 [ 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 0.005934 0.000054 0.000071 0.000246
0.001376 0.001115 0.000992 0.000853 [error]
Peak 0.005934 0.000054 0.000071 0.000246
0.001376 0.001115 0.000992 0.000853 [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 1.39e-09 3.81e-10 5.59e-11 9.30e-12 1.84e-09 1.84e-09 erg/cm2
Error 6.27e-10 2.97e-10 8.08e-11 2.67e-11 9.07e-10 9.11e-10 erg/cm2
Peak flux Power-law 1.50e+00 2.37e-01 1.74e-02 1.36e-03 1.76e+00 1.76e+00 ph/cm2/s
Error 6.79e-01 1.80e-01 2.45e-02 3.65e-03 8.06e-01 8.06e-01 ph/cm2/s
Fluence Cutoff-PL 1.39e-09 3.81e-10 5.58e-11 9.24e-12 1.84e-09 1.84e-09 erg/cm2
Error 6.27e-10 2.98e-10 8.08e-11 2.65e-11 9.08e-10 9.12e-10 erg/cm2
Peak flux Cutoff-PL 1.50e+00 2.37e-01 1.74e-02 1.35e-03 1.76e+00 1.76e+00 ph/cm2/s
Error 6.78e-01 1.80e-01 2.45e-02 3.63e-03 8.05e-01 8.06e-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 4.770 1.613 - - 1.42e-03 1.68e-03 42.490 57
CPL -4.966 0.000 13.8 8.9 3.33e+05 2.37e+06 40.940 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.770 1.613 - - 1.42e-03 1.68e-03 42.490 57
CPL -4.966 0.000 13.8 8.9 3.33e+05 2.37e+06 40.940 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
242.6308 +48.3546 0.0644 33.7 -16.4 0.0067 3.0 TRIG_00354341
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.784 -8.784 (delta_t = 52.000 [sec])
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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.77007 ( -0.950902 2.27608 )
Norm@50keV : 1.41556E-03 ( -0.00141556 0.00194099 )
------------------------------------------------------------
# Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7454 for 57 degrees of freedom
# Null hypothesis probability = 9.238908e-01
Photon flux (15-150 keV) in 0.032 sec: 1.75698 ( -0.811813 0.799542 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83596e-09 ( -9.23155e-10 8.91008e-10 ) 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: -4.96644 ( )
Epeak [keV] : 13.8413 ( -13.8413 3.90942 )
Norm@50keV : 3.32605E+05 ( -332636 4.3988e+06 )
------------------------------------------------------------
# Chi-Squared = 40.94 using 59 PHA bins.
# Reduced chi-squared = 0.7311 for 56 degrees of freedom
# Null hypothesis probability = 9.345649e-01
Photon flux (15-150 keV) in 0.032 sec: 1.75574 ( -0.811607 0.79918 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83572e-09 ( -9.23837e-10 8.91341e-10 ) 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 : -9.81948 ( 18.0589 27.6728 )
beta : -4.77006 ( -2.27733 0.950614 )
Epeak [keV] : 19.3766 ( -19.3766 -19.3766 )
Norm@50keV : 0.192398 ( -0.192397 0.263799 )
------------------------------------------------------------
# Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 55 degrees of freedom
# Null hypothesis probability = 8.912256e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak 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: 4.77007 ( -0.950902 2.27608 )
Norm@50keV : 1.41556E-03 ( -0.00141556 0.00194099 )
------------------------------------------------------------
# Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7454 for 57 degrees of freedom
# Null hypothesis probability = 9.238908e-01
Photon flux (15-150 keV) in 0.032 sec: 1.75698 ( -0.811813 0.799542 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83596e-09 ( -9.23155e-10 8.91008e-10 ) 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: -4.96644 ( )
Epeak [keV] : 13.8413 ( -13.8413 3.90942 )
Norm@50keV : 3.32605E+05 ( -332636 4.3988e+06 )
------------------------------------------------------------
# Chi-Squared = 40.94 using 59 PHA bins.
# Reduced chi-squared = 0.7311 for 56 degrees of freedom
# Null hypothesis probability = 9.345649e-01
Photon flux (15-150 keV) in 0.032 sec: 1.75574 ( -0.811607 0.79918 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.83572e-09 ( -9.23837e-10 8.91341e-10 ) 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 : -9.81948 ( 18.0589 27.6728 )
beta : -4.77006 ( -2.27733 0.950614 )
Epeak [keV] : 19.3766 ( -19.3766 -19.3766 )
Norm@50keV : 0.192398 ( -0.192397 0.263799 )
------------------------------------------------------------
# Chi-Squared = 42.49 using 59 PHA bins.
# Reduced chi-squared = 0.7725 for 55 degrees of freedom
# Null hypothesis probability = 8.912256e-01
Photon flux (15-150 keV) in 0.032 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Mon Jun 8 07:05:20 EDT 2009