batgrbproduct Analysis for Trigger=359182
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): Thu Aug 6 03:39:47 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger359182/GCN5_download_cron
======================================================================
Trigger: 00359182 Segment: 000
BAT Trigger Time: 271173793.856 [s; MET]
Trigger Stop: 271173794.304 [s; MET]
UTC: 2009-08-05T14:03:08.884180 [includes UTCF correction]
Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms
BAT
RA: 30.3596399753733 Dec: -39.8471965023476 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.69
Image Trigger?: NO
Rate S/N Ratio: 6.32455532033676 [ if not an image trigger ]
Image S/N Ratio: 5.69
Flight Position: [ source = BAT ]
RA: 30.3596399753733 Dec: -39.8471965023476 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 30.2729122167573 Dec: -39.701198907609 [deg; J2000]
{ 02h 01m 05.5s , -39d 42' 04.3" }
+/- 7.10339153824188 [arcmin] (estimated 90% radius based on SNR)
+/- 6.31058949340697 [arcmin] (formal 1-sigma fit error)
SNR: 1.84815644864474
Angular difference between Flight and Ground position is 9.629650 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.448000013828278 +/-
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
T50: 0.448000013828278 +/-
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.448000013828278 second)
Measured from: 2.98023223876953e-08
to: 0.4480000436306 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.448000013828278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003673 0.007542 0.006209 -0.007091
0.003488 0.003741 0.003526 0.003717 [error]
Peak 0.003673 0.007542 0.006209 -0.007091
0.003488 0.003741 0.003526 0.003717 [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 8.50e-10 2.11e-09 4.19e-09 2.05e-08 1.13e-08 2.79e-08 erg/cm2
Error 9.66e-10 1.54e-09 3.05e-09 3.76e-08 8.11e-09 4.10e-08 erg/cm2
Peak flux Power-law 6.06e-02 8.13e-02 8.09e-02 1.45e-01 2.70e-01 3.69e-01 ph/cm2/s
Error 6.97e-02 6.08e-02 5.80e-02 2.34e-01 1.80e-01 2.78e-01 ph/cm2/s
Fluence Cutoff-PL 5.15e-10 2.62e-09 5.04e-09 2.33e-09 1.00e-08 1.05e-08 erg/cm2
Error 8.54e-10 2.13e-09 4.58e-09 2.68e-08 7.69e-09 2.95e-08 erg/cm2
Peak flux Cutoff-PL 3.54e-02 9.82e-02 1.01e-01 2.56e-02 2.56e-01 2.59e-01 ph/cm2/s
Error 6.09e-02 8.27e-02 8.95e-02 1.73e-01 1.68e-01 2.34e-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 3.03e-01 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 0.999 1.131 - - 2.34e-03 1.95e-03 58.960 57
CPL -1.086 0.000 78.7 0.0 2.33e-02 1.21e+00 57.730 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.999 1.131 - - 2.34e-03 1.95e-03 58.960 57
CPL -1.086 0.000 78.7 0.0 2.33e-02 1.21e+00 57.730 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 0.448 0.000 0.448
T90 0.448 0.000 0.448
T50 0.448 0.000 0.448
Peak 0.448 0.000 0.448
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
30.2729 -39.7012 0.1042 11.2 -132.4 0.0130 1.8 TRIG_00359182
------------------------------------------
Foreground time interval of the image:
0.000 0.448 (delta_t = 0.448 [sec])
Background time interval of the image:
-60.856 -1.856 (delta_t = 59.000 [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 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999410 ( -1.20592 1.05611 )
Norm@50keV : 2.33999E-03 ( -0.00234077 0.00155535 )
------------------------------------------------------------
# Chi-Squared = 58.96 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.038468e-01
Photon flux (15-150 keV) in 0.448 sec: 0.269723 ( -0.179566 0.181192 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13004e-08 ( -7.84439e-09 8.36725e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.08561 ( 1.12896 1.12896 )
Epeak [keV] : 78.6672 ( -74.8465 -74.8465 )
Norm@50keV : 2.33448E-02 ( -0.0353174 2.3765 )
------------------------------------------------------------
# Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.110309e-01
Photon flux (15-150 keV) in 0.448 sec: 0.256116 ( -0.159519 0.177463 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00123e-08 ( -6.7894e-09 8.59967e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.10020 ( -1.72573 0.188606 )
beta : -10.00000 ( 2.23191e+11 2.23191e+11 )
Epeak [keV] : 78.3539 ( -37.7314 -73.6861 )
Norm@50keV : 2.37863E-02 ( -0.036989 1.39656 )
------------------------------------------------------------
# Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.746764e-01
Photon flux (15-150 keV) in 0.448 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 0.448 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999410 ( -1.20592 1.05611 )
Norm@50keV : 2.33999E-03 ( -0.00234077 0.00155535 )
------------------------------------------------------------
# Chi-Squared = 58.96 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 57 degrees of freedom
# Null hypothesis probability = 4.038468e-01
Photon flux (15-150 keV) in 0.448 sec: 0.269723 ( -0.179566 0.181192 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.13004e-08 ( -7.84439e-09 8.36725e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.08561 ( 1.12896 1.12896 )
Epeak [keV] : 78.6672 ( -74.8465 -74.8465 )
Norm@50keV : 2.33448E-02 ( -0.0353174 2.3765 )
------------------------------------------------------------
# Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.031 for 56 degrees of freedom
# Null hypothesis probability = 4.110309e-01
Photon flux (15-150 keV) in 0.448 sec: 0.256116 ( -0.159519 0.177463 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00123e-08 ( -6.7894e-09 8.60254e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.448 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.10020 ( -1.72606 0.188606 )
beta : -10.00000 ( 2.23191e+11 2.23191e+11 )
Epeak [keV] : 78.3539 ( -37.7314 -73.6861 )
Norm@50keV : 2.37863E-02 ( -0.036989 1.39656 )
------------------------------------------------------------
# Chi-Squared = 57.73 using 59 PHA bins.
# Reduced chi-squared = 1.050 for 55 degrees of freedom
# Null hypothesis probability = 3.746764e-01
Photon flux (15-150 keV) in 0.448 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Thu Aug 6 03:53:56 EDT 2009