batgrbproduct Analysis for Trigger=354494
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): Wed Jun 10 11:07:17 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354494/GCN5_download_cron
======================================================================
Trigger: 00354494 Segment: 000
BAT Trigger Time: 266270617.664 [s; MET]
Trigger Stop: 266270618.688 [s; MET]
UTC: 2009-06-09T20:03:32.850720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 160.685667999975 Dec: 9.3199853654007 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.74
Image Trigger?: NO
Rate S/N Ratio: 10.9544511501033 [ if not an image trigger ]
Image S/N Ratio: 5.74
Flight Position: [ source = BAT ]
RA: 160.685667999975 Dec: 9.3199853654007 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 160.71486563819 Dec: 9.34480691420452 [deg; J2000]
{ 10h 42m 51.6s , +09d 20' 41.3" }
+/- 3.61296788036804 [arcmin] (estimated 90% radius based on SNR)
+/- 1.67896141583028 [arcmin] (formal 1-sigma fit error)
SNR: 4.85478123656747
Angular difference between Flight and Ground position is 2.281731 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
T50: 1.02399998903275 +/-
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02399998903275 second)
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02399998903275 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.007127 0.001079 0.016385 0.022638
0.005792 0.006263 0.006215 0.006912 [error]
Peak 0.007127 0.001079 0.016385 0.022638
0.005792 0.006263 0.006215 0.006912 [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 5.04e-11 6.44e-10 7.54e-09 6.94e-07 3.47e-08 7.02e-07 erg/cm2
Error 2.61e-10 1.42e-09 7.43e-09 4.04e-07 2.71e-08 4.03e-07 erg/cm2
Peak flux Power-law 1.50e-03 9.90e-03 5.80e-02 1.63e+00 1.96e-01 1.68e+00 ph/cm2/s
Error 7.92e-03 2.28e-02 5.91e-02 9.13e-01 1.35e-01 8.98e-01 ph/cm2/s
Fluence Cutoff-PL 3.83e-11 5.45e-10 7.12e-09 7.84e-07 3.46e-08 7.92e-07 erg/cm2
Error 2.52e-10 1.39e-09 6.52e-09 4.70e-07 2.73e-08 4.68e-07 erg/cm2
Peak flux Cutoff-PL 1.16e-03 8.34e-03 5.45e-02 1.83e+00 1.92e-01 1.88e+00 ph/cm2/s
Error 7.61e-03 2.24e-02 5.87e-02 1.05e+00 1.36e-01 1.36e+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 -1.679 1.015 - - 5.03e-04 1.00e-03 56.620 57
CPL -2.107 1.470 9999.4 0.0 3.99e-04 0.00e+00 56.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.679 1.015 - - 5.03e-04 1.00e-03 56.620 57
CPL -2.107 1.470 9999.4 0.0 3.99e-04 0.00e+00 56.480 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
160.7149 +9.3448 0.0397 15.6 50.5 0.0592 4.9 TRIG_00354494
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.664 -9.664 (delta_t = 51.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.67944 ( -0.521561 1.50823 )
Norm@50keV : 5.02551E-04 ( -0.000513385 0.00149215 )
------------------------------------------------------------
# Chi-Squared = 56.62 using 59 PHA bins.
# Reduced chi-squared = 0.9933 for 57 degrees of freedom
# Null hypothesis probability = 4.893308e-01
Photon flux (15-150 keV) in 1.024 sec: 0.195962 ( -0.135209 0.135645 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47318e-08 ( -3.47324e-08 1.95338e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.10720 ( -1.70599 1.23364 )
Epeak [keV] : 9999.36 ( -10000 -10000 )
Norm@50keV : 3.98735E-04 ( )
------------------------------------------------------------
# Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 56 degrees of freedom
# Null hypothesis probability = 4.568926e-01
Photon flux (15-150 keV) in 1.024 sec: 0.192168 ( -0.133178 0.138582 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.46039e-08 ( -3.46039e-08 1.99808e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.803372 ( -0.805003 -0.805003 )
beta : 1.54600 ( -1.37137 0.642007 )
Epeak [keV] : 16.1285 ( -16.1135 -16.1135 )
Norm@50keV : 1.43491E-03 ( 52.6398 -0.00143419 )
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.161794e-01
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.67944 ( -0.521561 1.50823 )
Norm@50keV : 5.02551E-04 ( -0.000513385 0.00149215 )
------------------------------------------------------------
# Chi-Squared = 56.62 using 59 PHA bins.
# Reduced chi-squared = 0.9933 for 57 degrees of freedom
# Null hypothesis probability = 4.893308e-01
Photon flux (15-150 keV) in 1.024 sec: 0.195962 ( -0.135209 0.135645 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.47318e-08 ( -3.47324e-08 1.95338e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.10720 ( -1.70599 1.23364 )
Epeak [keV] : 9999.36 ( -10000 -10000 )
Norm@50keV : 3.98735E-04 ( )
------------------------------------------------------------
# Chi-Squared = 56.48 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 56 degrees of freedom
# Null hypothesis probability = 4.568926e-01
Photon flux (15-150 keV) in 1.024 sec: 0.192168 ( -0.133178 0.138582 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.46039e-08 ( -3.46039e-08 1.99808e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.803372 ( -0.805003 -0.805003 )
beta : 1.54600 ( -1.37137 0.642007 )
Epeak [keV] : 16.1285 ( -16.1135 -16.1135 )
Norm@50keV : 1.43491E-03 ( 52.6398 -0.00143419 )
------------------------------------------------------------
# Chi-Squared = 56.57 using 59 PHA bins.
# Reduced chi-squared = 1.029 for 55 degrees of freedom
# Null hypothesis probability = 4.161794e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jun 10 11:18:46 EDT 2009