batgrbproduct Analysis for Trigger=213630
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 v2.41
Process Start Time (local time): Tue Jan 1 15:50:09 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger213630/SDC
======================================================================
Trigger: 00213630 Segment: 000
BAT Trigger Time: 171224145.856 [s; MET]
Trigger Stop: 171224148.928 [s; MET]
UTC: 2006-06-05T18:15:44.618460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 322.143864682533 Dec: -6.06022138273773 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.96
Image Trigger?: NO
Rate S/N Ratio: 15.9059737205869 [ if not an image trigger ]
Image S/N Ratio: 7.96
Flight Position: [ source = BAT ]
RA: 322.143864682533 Dec: -6.06022138273773 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 322.135454431477 Dec: -6.05778400262333 [deg; J2000]
{ 21h 28m 32.5s , -06d 03' 28.0" }
+/- 2.18733226448093 [arcmin] (estimated 90% radius based on SNR)
+/- 0.849085377571422 [arcmin] (formal 1-sigma fit error)
SNR: 9.94319294746551
RA = 21h 28m 32.5s (322.135454 deg.)
Dec = -6d 3' 28" (-6.057784 deg.)
Angular difference between Flight and Ground position is 0.522672 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 114.799999952316 +/- 35.0141649091828
Measured from: -101.055999994278
to: 13.7439999580383 [s; relative to TRIGTIME]
T50: 62.1919999718666 +/- 23.2679501553205
Measured from: -55.3120000064373
to: 6.87999996542931 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.11599999666214
to: 3.11599999666214 [s; relative to TRIGTIME]
Total Fluence
Measured from: -116.048000007868
to: 15.9679999947548 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.334135 0.511045 0.366265 0.082447
0.053805 0.054638 0.048776 0.043978 [error]
Peak 0.010514 0.020859 0.023888 0.013070
0.004781 0.005073 0.004635 0.004028 [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-07 1.93e-07 2.78e-07 8.50e-07 7.91e-07 1.42e-06 erg/cm2
Error 2.15e-08 2.48e-08 4.72e-08 3.09e-07 1.14e-07 3.47e-07 erg/cm2
Peak flux Power-law 9.61e-02 1.38e-01 1.48e-01 2.95e-01 4.74e-01 6.78e-01 ph/cm2/s
Error 4.87e-02 4.28e-02 3.51e-02 1.59e-01 1.13e-01 1.72e-01 ph/cm2/s
Fluence Cutoff-PL 9.33e-08 2.09e-07 2.86e-07 3.04e-07 7.44e-07 8.85e-07 erg/cm2
Error 2.52e-08 3.28e-08 5.32e-08 5.17e-07 1.29e-07 4.92e-07 erg/cm2
Peak flux Cutoff-PL 8.30e-02 1.42e-01 1.59e-01 1.81e-01 4.66e-01 5.65e-01 ph/cm2/s
Error 6.09e-02 4.76e-02 4.79e-02 2.18e-01 1.17e-01 2.43e-01 ph/cm2/s
Fluence Band 9.17e-08 2.09e-07 2.83e-07 4.36e-07 7.43e-07 9.44e-07 erg/cm2
Error 1.90e-08 3.45e-08 5.82e-08 3.66e-07 1.26e-07 0.00e+00 erg/cm2
Peak flux Band 7.63e-02 1.45e-01 1.60e-01 2.18e-01 4.59e-01 6.10e-01 ph/cm2/s
Error 6.29e-02 3.89e-02 4.57e-02 1.71e-01 1.13e-01 2.67e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.473 0.219 - - 6.29e-04 8.10e-05 81.362 57
CPL 0.780 0.983 84.5 4972.0 1.45e-03 2.83e-03 79.541 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.901 0.421 - - 4.13e-03 9.84e-04 55.996 57
CPL 0.894 0.424 9992.7 0.0 4.16e-03 0.00e+00 55.990 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: 8.768000 sec.
T50 in the 50-300 keV band: 4.928000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 132.016 -116.048 15.968
T90 114.800 -101.056 13.744
T50 62.192 -55.312 6.880
Peak 1.000 2.116 3.116
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
322.1355 -6.0578 0.0194 15.8 128.1 1.3938 9.9 TRIG_00213630
------------------------------------------
Foreground time interval of the image:
-116.048 15.968 (delta_t = 132.016 [sec])
Background time interval of the image:
-239.856 -116.048 (delta_t = 123.808 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -116.048 sec. to 15.968 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.47316 ( -0.218070 0.220805 )
Norm@50keV : 6.291466E-04 ( -8.140312E-05 8.066703E-05) )
------------------------------------------------------------
Chi-Squared = 81.36211 using 59 PHA bins.
Reduced chi-squared = 1.427405 for 57 degrees of freedom
Null hypothesis probability = 1.876E-02
Photon flux (15-150 keV) in 132.0 sec: 7.798916E-02 ( -0.00974413 0.0097551 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.91329e-07 ( -1.1291e-07 1.15026e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -116.048 sec. to 15.968 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.780296 ( -1.14843 0.816576 )
Epeak [keV] : 84.4811 ( -28.4079 9915.52 )
Norm@50keV : 1.451197E-03 ( -1.451197E-03 4.201400E-03) )
------------------------------------------------------------
Chi-Squared = 79.54093 using 59 PHA bins.
but latest trial 48.1961 gives Chi-Squared = 7.06796
Reduced chi-squared = 1.420374 for 56 degrees of freedom
Null hypothesis probability = 2.101E-02
Photon flux (15-150 keV) in 132.0 sec: 7.570498E-02 ( -0.0102024 0.0101856 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.43571e-07 ( -1.28238e-07 1.30276e-07 ) ergs/cm2
Band function
Time interval is from -116.048 sec. to 15.968 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.900547 ( -11.6143 3.17585 )
beta : -2.12660 ( -4.63173 3.71109 )
Epeak [keV] : 90.2242 ( -38.7539 9961.15 )
Norm@50keV : 1.269351E-03 ( -0.516153 9.00018 )
------------------------------------------------------------
Chi-Squared = 79.58410 using 59 PHA bins.
Reduced chi-squared = 1.446984 for 55 degrees of freedom
Null hypothesis probability = 1.675E-02
Photon flux (15-150 keV) in 132.0 sec: 7.623424E-02 ( -0.0104253 0.0102175 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.43259e-07 ( -1.09697e-07 1.42671e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.900891 ( -0.441650 0.400705 )
Norm@50keV : 4.132117E-03 ( -9.967822E-04 9.703436E-04) )
------------------------------------------------------------
Chi-Squared = 55.99591 using 59 PHA bins.
Reduced chi-squared = 0.9823843 for 57 degrees of freedom
Null hypothesis probability = 0.513
Photon flux (15-150 keV) in 1.008 sec: 0.474268 ( -0.112318 0.113139 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.67402e-08 ( -1.12383e-08 1.13066e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.894130 ( -0.445425 0.403512 )
Epeak [keV] : 9992.69 ( )
Norm@50keV : 4.159815E-03 ( )
------------------------------------------------------------
Chi-Squared = 55.99023 using 59 PHA bins.
Reduced chi-squared = 0.9998255 for 56 degrees of freedom
Null hypothesis probability = 0.475
Photon flux (15-150 keV) in 1.008 sec: 0.466384 ( -0.118652 0.115594 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58134e-08 ( -1.2656e-08 1.18625e-08 ) ergs/cm2
Band function
Time interval is from 2.112 sec. to 3.120 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.802116 ( -9.19788 5.80212 )
beta : -0.900920 ( -0.400721 0.441683 )
Epeak [keV] : 30.9707 ( -30.8707 9969.03 )
Norm@50keV : 6.119346E-03 ( -2.924284E-03 1235.64 )
------------------------------------------------------------
Chi-Squared = 55.99591 using 59 PHA bins.
Reduced chi-squared = 1.018107 for 55 degrees of freedom
Null hypothesis probability = 0.437
Photon flux (15-150 keV) in 1.008 sec: 0.458877 ( -0.107379 0.118807 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.58267e-08 ( -1.26503e-08 1.18289e-08 ) ergs/cm2
Plot creation:
Tue Jan 1 16:02:26 EST 2008