batgrbproduct Analysis for Trigger=354224
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): Sat Jun 6 18:13:23 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354224/GCN5_download_cron
======================================================================
Trigger: 00354224 Segment: 000
BAT Trigger Time: 265973303.552 [s; MET]
Trigger Stop: 265973304.576 [s; MET]
UTC: 2009-06-06T09:28:18.748240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.940781573845 Dec: -30.3713080090065 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.57
Image Trigger?: NO
Rate S/N Ratio: 8.83176086632785 [ if not an image trigger ]
Image S/N Ratio: 6.57
Flight Position: [ source = BAT ]
RA: 275.940781573845 Dec: -30.3713080090065 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 275.876131018445 Dec: -30.3489987040293 [deg; J2000]
{ 18h 23m 30.3s , -30d 20' 56.4" }
+/- 5.45176036291437 [arcmin] (estimated 90% radius based on SNR)
+/- 3.84648231892263 [arcmin] (formal 1-sigma fit error)
SNR: 2.69726124110828
Angular difference between Flight and Ground position is 3.604817 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
T50: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400001883507 second)
Measured from: 1.49011611938477e-08
to: 1.02400003373623 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.039928 0.001733 -0.001433 -0.003299
0.006366 0.005175 0.004368 0.003928 [error]
Peak 0.039928 0.001733 -0.001433 -0.003299
0.006366 0.005175 0.004368 0.003928 [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 1.03e-08 2.16e-09 2.26e-10 2.60e-11 1.27e-08 1.27e-08 erg/cm2
Error 2.91e-09 1.79e-09 4.87e-10 1.36e-10 4.56e-09 4.59e-09 erg/cm2
Peak flux Power-law 3.50e-01 4.26e-02 2.23e-03 1.23e-04 3.95e-01 3.95e-01 ph/cm2/s
Error 9.70e-02 3.37e-02 4.65e-03 5.94e-04 1.21e-01 1.21e-01 ph/cm2/s
Fluence Cutoff-PL 1.16e-08 1.11e-09 5.22e-13 1.37e-20 1.27e-08 1.27e-08 erg/cm2
Error 3.14e-09 1.60e-09 2.44e-10 0.00e+00 3.81e-09 3.72e-09 erg/cm2
Peak flux Cutoff-PL 3.50e-01 4.26e-02 2.23e-03 1.22e-04 3.95e-01 3.95e-01 ph/cm2/s
Error 9.70e-02 3.37e-02 4.64e-03 5.89e-04 1.20e-01 1.21e-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 5.246 1.373 - - 2.02e-04 3.28e-04 63.730 57
CPL 1.000 0.000 50.0 0.0 4.28e-03 0.00e+00 93.040 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.246 1.373 - - 2.02e-04 3.28e-04 63.730 57
CPL 1.000 0.000 50.0 0.0 4.28e-03 0.00e+00 93.040 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
275.8761 -30.3490 0.0710 7.5 -112.4 0.0263 2.7 TRIG_00354224
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-239.552 -56.402 (delta_t = 183.150 [sec])
-55.552 -7.552 (delta_t = 48.000 [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: 5.24617 ( -1.14892 1.59727 )
Norm@50keV : 2.02250E-04 ( -0.000202167 0.000454295 )
------------------------------------------------------------
# Chi-Squared = 63.73 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.517426e-01
Photon flux (15-150 keV) in 1.024 sec: 0.395088 ( -0.119699 0.121333 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27028e-08 ( -4.31793e-09 4.80416e-09 ) 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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.27628E-03 ( )
------------------------------------------------------------
# Chi-Squared = 93.04 using 59 PHA bins.
# Reduced chi-squared = 1.661 for 56 degrees of freedom
# Null hypothesis probability = 1.373673e-03
Photon flux (15-150 keV) in 1.024 sec: 0.394714 ( -0.119665 0.121291 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27062e-08 ( -3.73185e-09 3.89171e-09 ) 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 : -9.33237 ( 6.42509 9.62482 )
beta : -5.25751 ( -1.76284 0.983835 )
Epeak [keV] : 658.456 ( -658.456 -658.456 )
Norm@50keV : 2.71528E-02 ( -0.0272512 0.0619694 )
------------------------------------------------------------
# Chi-Squared = 63.73 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 55 degrees of freedom
# Null hypothesis probability = 1.963193e-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: 5.24617 ( -1.14892 1.59727 )
Norm@50keV : 2.02250E-04 ( -0.000202167 0.000454295 )
------------------------------------------------------------
# Chi-Squared = 63.73 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.517426e-01
Photon flux (15-150 keV) in 1.024 sec: 0.395088 ( -0.119699 0.121333 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27028e-08 ( -4.31793e-09 4.80416e-09 ) 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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 4.27628E-03 ( )
------------------------------------------------------------
# Chi-Squared = 93.04 using 59 PHA bins.
# Reduced chi-squared = 1.661 for 56 degrees of freedom
# Null hypothesis probability = 1.373673e-03
Photon flux (15-150 keV) in 1.024 sec: 0.394714 ( -0.119665 0.121291 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.27062e-08 ( -3.73185e-09 3.89171e-09 ) 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 : -9.33237 ( 6.42509 9.62482 )
beta : -5.25751 ( -1.76284 0.983835 )
Epeak [keV] : 658.456 ( -658.456 -658.456 )
Norm@50keV : 2.71528E-02 ( -0.0272512 0.0619694 )
------------------------------------------------------------
# Chi-Squared = 63.73 using 59 PHA bins.
# Reduced chi-squared = 1.159 for 55 degrees of freedom
# Null hypothesis probability = 1.963193e-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:
Sat Jun 6 18:30:29 EDT 2009