batgrbproduct Analysis for Trigger=355242
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 v2.45
Process Start Time (local time): Sun Jun 21 01:28:08 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355242/GCN5_download_cron
======================================================================
Trigger: 00355242 Segment: 000
BAT Trigger Time: 267178148.032 [s; MET]
Trigger Stop: 267178174.912 [s; MET]
UTC: 2009-06-20T08:09:03.189660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 116.218056313221 Dec: -24.1238881653403 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.68
Image Trigger?: NO
Rate S/N Ratio: 18.6010752377383 [ if not an image trigger ]
Image S/N Ratio: 5.68
Flight Position: [ source = BAT ]
RA: 116.218056313221 Dec: -24.1238881653403 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 116.334584425154 Dec: -24.0887478518634 [deg; J2000]
{ 07h 45m 20.3s , -24d 05' 19.5" }
+/- 4.66221589410213 [arcmin] (estimated 90% radius based on SNR)
+/- 2.88479412475697 [arcmin] (formal 1-sigma fit error)
SNR: 3.37276752593207
Angular difference between Flight and Ground position is 6.721200 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
T50: 26.8799999952316 +/-
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 26.8799999952316 second)
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 26.8799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.082612 0.077786 -0.043775 -0.000086
0.029032 0.027727 0.023614 0.021934 [error]
Peak 0.082612 0.077786 -0.043775 -0.000086
0.029032 0.027727 0.023614 0.021934 [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 1.78e-08 1.81e-08 1.28e-08 1.44e-08 5.44e-08 6.38e-08 erg/cm2
Error 1.08e-08 1.14e-08 1.46e-08 3.27e-08 3.78e-08 6.73e-08 erg/cm2
Peak flux Power-law 2.19e-02 1.23e-02 4.37e-03 2.03e-03 3.97e-02 4.06e-02 ph/cm2/s
Error 1.35e-02 7.70e-03 4.88e-03 4.18e-03 2.29e-02 2.39e-02 ph/cm2/s
Fluence Cutoff-PL 2.05e-08 3.10e-08 4.72e-09 5.57e-08 0.00e+00 0.00e+00 erg/cm2
Error 1.13e-08 1.66e-08 2.61e-08 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.37e-02 2.18e-02 1.96e-03 3.85e-06 4.74e-02 4.74e-02 ph/cm2/s
Error 1.25e-02 1.09e-02 3.10e-03 1.44e-04 2.11e-02 2.11e-02 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 2.513 1.034 - - 2.00e-04 1.93e-04 80.670 57
CPL -4.916 0.000 29.4 7.9 2.25e+01 1.67e+01 74.690 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.513 1.034 - - 2.00e-04 1.93e-04 80.670 57
CPL -4.916 0.000 29.4 7.9 2.25e+01 1.67e+01 74.690 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 26.880 0.000 26.880
T90 26.880 0.000 26.880
T50 26.880 0.000 26.880
Peak 26.880 0.000 26.880
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
116.3346 -24.0887 0.0570 12.2 -100.1 0.2848 3.4 TRIG_00355242
------------------------------------------
Foreground time interval of the image:
0.000 26.880 (delta_t = 26.880 [sec])
Background time interval of the image:
-60.032 -44.032 (delta_t = 16.000 [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 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51311 ( -0.868802 1.19826 )
Norm@50keV : 1.99897E-04 ( -0.000201475 0.000183596 )
------------------------------------------------------------
# Chi-Squared = 80.67 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 57 degrees of freedom
# Null hypothesis probability = 2.124733e-02
Photon flux (15-150 keV) in 26.88 sec: 3.96727E-02 ( -0.0227439 0.0231024 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.43782e-08 ( -3.43158e-08 4.12847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.91571 ( )
Epeak [keV] : 29.4473 ( -7.28613 8.60066 )
Norm@50keV : 22.4987 ( -22.4987 10.8997 )
------------------------------------------------------------
# Chi-Squared = 74.69 using 59 PHA bins.
# Reduced chi-squared = 1.334 for 56 degrees of freedom
# Null hypothesis probability = 4.821377e-02
Photon flux (15-150 keV) in 26.88 sec: 4.74097E-02 ( -0.0210954 0.02111 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -60077.8 -60062.8 )
beta : -9.37167 ( 10 19.9959 )
Epeak [keV] : 29.3285 ( -4.25594 8.71504 )
Norm@50keV : 26.3654 ( -22.4652 100.176 )
------------------------------------------------------------
# Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.966282e-02
Photon flux (15-150 keV) in 26.88 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 26.880 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51311 ( -0.868802 1.19826 )
Norm@50keV : 1.99897E-04 ( -0.000201475 0.000183596 )
------------------------------------------------------------
# Chi-Squared = 80.67 using 59 PHA bins.
# Reduced chi-squared = 1.415 for 57 degrees of freedom
# Null hypothesis probability = 2.124733e-02
Photon flux (15-150 keV) in 26.88 sec: 3.96727E-02 ( -0.0227439 0.0231024 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.43782e-08 ( -3.43158e-08 4.12847e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.91571 ( )
Epeak [keV] : 29.4473 ( -7.28613 8.60066 )
Norm@50keV : 22.4987 ( -22.4987 10.8997 )
------------------------------------------------------------
# Chi-Squared = 74.69 using 59 PHA bins.
# Reduced chi-squared = 1.334 for 56 degrees of freedom
# Null hypothesis probability = 4.821377e-02
Photon flux (15-150 keV) in 26.88 sec: 4.74097E-02 ( -0.0210954 0.02111 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 26.880 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99997 ( -60077.8 -60062.8 )
beta : -9.37167 ( 10 19.9959 )
Epeak [keV] : 29.3285 ( -4.25594 8.71504 )
Norm@50keV : 26.3654 ( -22.4652 100.174 )
------------------------------------------------------------
# Chi-Squared = 74.71 using 59 PHA bins.
# Reduced chi-squared = 1.358 for 55 degrees of freedom
# Null hypothesis probability = 3.966282e-02
Photon flux (15-150 keV) in 26.88 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jun 21 02:02:36 EDT 2009