batgrbproduct Analysis for Trigger=354542
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 17:03:01 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354542/GCN5_download_cron
======================================================================
Trigger: 00354542 Segment: 000
BAT Trigger Time: 266313272 [s; MET]
Trigger Stop: 266313592 [s; MET]
UTC: 2009-06-10T07:54:27.185360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 248.175639714661 Dec: -47.3913525313119 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.69
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.69
Flight Position: [ source = BAT ]
RA: 248.175639714661 Dec: -47.3913525313119 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 248.189822823019 Dec: -47.4392334314149 [deg; J2000]
{ 16h 32m 45.6s , -47d 26' 21.2" }
+/- 2.67046866302199 [arcmin] (estimated 90% radius based on SNR)
+/- 1.38309806879955 [arcmin] (formal 1-sigma fit error)
SNR: 7.47666092989409
Angular difference between Flight and Ground position is 2.929998 arcmin
Partial Coding Fraction: 0.9765625 [ 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 0.722056 0.587088 0.304242 0.115466
0.096990 0.091778 0.079126 0.067642 [error]
Peak 0.722056 0.587088 0.304242 0.115466
0.096990 0.091778 0.079126 0.067642 [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 1.76e-07 2.51e-07 2.66e-07 5.21e-07 8.54e-07 1.21e-06 erg/cm2
Error 4.07e-08 4.01e-08 7.63e-08 3.06e-07 1.73e-07 3.85e-07 erg/cm2
Peak flux Power-law 1.78e-02 1.41e-02 7.45e-03 5.74e-03 4.20e-02 4.51e-02 ph/cm2/s
Error 4.23e-03 2.23e-03 2.06e-03 3.12e-03 6.66e-03 7.33e-03 ph/cm2/s
Fluence Cutoff-PL 1.76e-07 2.51e-07 2.66e-07 5.17e-07 8.54e-07 1.21e-06 erg/cm2
Error 4.07e-08 4.02e-08 7.64e-08 3.03e-07 1.73e-07 3.83e-07 erg/cm2
Peak flux Cutoff-PL 1.78e-02 1.41e-02 7.45e-03 5.69e-03 4.19e-02 4.50e-02 ph/cm2/s
Error 4.23e-03 2.23e-03 2.07e-03 3.10e-03 6.65e-03 7.32e-03 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 1.916 0.322 - - 2.90e-04 5.97e-05 76.590 57
CPL 2.538 0.000 185.1 0.0 1.45e-04 0.00e+00 76.380 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.916 0.322 - - 2.90e-04 5.97e-05 76.590 57
CPL 2.538 0.000 185.1 0.0 1.45e-04 0.00e+00 76.380 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
248.1898 -47.4392 0.0259 9.5 112.8 1.7407 7.5 TRIG_00354542
------------------------------------------
Foreground time interval of the image:
0.000 320.000 (delta_t = 320.000 [sec])
Background time interval of the image:
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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91569 ( -0.310704 0.333512 )
Norm@50keV : 2.90373E-04 ( -6.10662e-05 5.84141e-05 )
------------------------------------------------------------
# Chi-Squared = 76.59 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.276959e-02
Photon flux (15-150 keV) in 320 sec: 4.19519E-02 ( -0.00665633 0.00665683 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.54429e-07 ( -1.691e-07 1.75999e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.53790 ( )
Epeak [keV] : 185.111 ( )
Norm@50keV : 1.44614E-04 ( )
------------------------------------------------------------
# Chi-Squared = 76.38 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 56 degrees of freedom
# Null hypothesis probability = 3.647983e-02
Photon flux (15-150 keV) in 320 sec: 4.19358E-02 ( -0.0066538 0.0066546 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.5423e-07 ( -1.69085e-07 1.75997e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99855 ( -1323.28 -1323.28 )
beta : -2.12542 ( -0.666744 0.355325 )
Epeak [keV] : 23.7790 ( -23.7304 4.27633 )
Norm@50keV : 62.8838 ( -42.7124 184797 )
------------------------------------------------------------
# Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 55 degrees of freedom
# Null hypothesis probability = 3.433997e-02
Photon flux (15-150 keV) in 320 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 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.91569 ( -0.310704 0.333512 )
Norm@50keV : 2.90373E-04 ( -6.10662e-05 5.84141e-05 )
------------------------------------------------------------
# Chi-Squared = 76.59 using 59 PHA bins.
# Reduced chi-squared = 1.344 for 57 degrees of freedom
# Null hypothesis probability = 4.276959e-02
Photon flux (15-150 keV) in 320 sec: 4.19519E-02 ( -0.00665633 0.00665683 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.54429e-07 ( -1.691e-07 1.75999e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.53790 ( )
Epeak [keV] : 185.111 ( )
Norm@50keV : 1.44614E-04 ( )
------------------------------------------------------------
# Chi-Squared = 76.38 using 59 PHA bins.
# Reduced chi-squared = 1.364 for 56 degrees of freedom
# Null hypothesis probability = 3.647983e-02
Photon flux (15-150 keV) in 320 sec: 4.19358E-02 ( -0.0066538 0.0066546 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.5423e-07 ( -1.69085e-07 1.75997e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99855 ( -1323.28 -1323.28 )
beta : -2.12542 ( -0.666744 0.355325 )
Epeak [keV] : 23.7790 ( -23.7304 4.27633 )
Norm@50keV : 62.8838 ( -42.7124 184797 )
------------------------------------------------------------
# Chi-Squared = 75.56 using 59 PHA bins.
# Reduced chi-squared = 1.374 for 55 degrees of freedom
# Null hypothesis probability = 3.433997e-02
Photon flux (15-150 keV) in 320 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jun 10 17:20:32 EDT 2009