batgrbproduct Analysis for Trigger=146129
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): Mon Jan 7 15:52:20 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger146129/GCN5_download_cron
======================================================================
Trigger: 00146129 Segment: 000
BAT Trigger Time: 143159426.048 [s; MET]
Trigger Stop: 143159430.144 [s; MET]
UTC: 2005-07-15T22:30:26.424240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 155.669314942153 Dec: -0.0590341924076137 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.08
Image Trigger?: NO
Rate S/N Ratio: 11.8321595661992 [ if not an image trigger ]
Image S/N Ratio: 9.08
Flight Position: [ source = BAT ]
RA: 155.669314942153 Dec: -0.0590341924076137 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 155.643246666996 Dec: -0.0285932787955815 [deg; J2000]
{ 10h 22m 34.4s , -00d 01' 42.9" }
+/- 1.36341722077995 [arcmin] (estimated 90% radius based on SNR)
+/- 0.620194095411249 [arcmin] (formal 1-sigma fit error)
SNR: 19.5340168686253
RA = 10h 22m 34.4s (155.643247 deg.)
Dec = 0d 1' 43" (-0.028593 deg.)
Angular difference between Flight and Ground position is 2.404648 arcmin
Partial Coding Fraction: 0.734375 [ including projection effects ]
Duration
T90: 48.6240000128746 +/- 99.5035621076022
Measured from: 1.25999999046326
to: 49.8840000033379 [s; relative to TRIGTIME]
T50: 33.16400000453 +/- 3.12697939253764
Measured from: 7.66400000452995
to: 40.8280000090599 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 40.419999986887
to: 41.419999986887 [s; relative to TRIGTIME]
Total Fluence
Measured from: -101.316000014544
to: 53.3560000061989 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.750657 0.944142 0.630444 0.181040
0.063780 0.065544 0.058428 0.053779 [error]
Peak 0.041348 0.054515 0.026824 0.003798
0.005636 0.005978 0.005393 0.004617 [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 2.23e-07 3.86e-07 5.11e-07 1.38e-06 1.49e-06 2.50e-06 erg/cm2
Error 3.10e-08 3.18e-08 5.91e-08 3.48e-07 1.38e-07 3.93e-07 erg/cm2
Peak flux Power-law 3.91e-01 3.52e-01 2.19e-01 2.06e-01 1.05e+00 1.17e+00 ph/cm2/s
Error 8.06e-02 4.80e-02 4.42e-02 8.17e-02 1.42e-01 1.64e-01 ph/cm2/s
Fluence Cutoff-PL 2.23e-07 3.87e-07 5.11e-07 1.36e-06 1.49e-06 2.49e-06 erg/cm2
Error 3.10e-08 3.18e-08 5.93e-08 3.45e-07 1.38e-07 3.90e-07 erg/cm2
Peak flux Cutoff-PL 3.75e-01 3.76e-01 2.18e-01 1.00e-01 1.03e+00 1.07e+00 ph/cm2/s
Error 8.72e-02 6.72e-02 5.16e-02 1.40e-01 1.46e-01 2.05e-01 ph/cm2/s
Fluence Band 2.20e-07 3.87e-07 5.09e-07 1.36e-06 1.49e-06 2.47e-06 erg/cm2
Error 3.22e-08 4.09e-08 6.08e-08 5.12e-07 1.43e-07 5.45e-07 erg/cm2
Peak flux Band 3.63e-01 4.07e-01 1.99e-01 1.31e-01 1.03e+00 1.10e+00 ph/cm2/s
Error 1.01e-01 7.63e-02 4.69e-02 5.01e-02 1.45e-01 1.73e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.597 0.153 - - 1.03e-03 8.73e-05 56.284 57
CPL 1.541 0.586 400.1 0.0 1.10e-03 8.80e-05 56.534 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.689 0.242 - - 7.93e-03 1.23e-03 48.750 57
CPL 1.184 1.149 68.2 5000.0 1.56e-02 4.88e-02 47.959 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: 54.784000 sec.
T50 in the 50-300 keV band: 35.200000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 154.672 -101.316 53.356
T90 48.624 1.260 49.884
T50 33.164 7.664 40.828
Peak 1.000 40.420 41.420
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
155.6432 -0.0286 0.0099 20.8 -76.5 2.4380 19.5 TRIG_00146129
------------------------------------------
Foreground time interval of the image:
-73.347 53.356 (delta_t = 126.703 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -101.316 sec. to 53.356 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59708 ( -0.152365 0.153984 )
Norm@50keV : 1.031025E-03 ( -8.771801E-05 8.683838E-05) )
------------------------------------------------------------
Chi-Squared = 56.28360 using 59 PHA bins.
Reduced chi-squared = 0.9874315 for 57 degrees of freedom
Null hypothesis probability = 0.502
Photon flux (15-150 keV) in 154.7 sec: 0.132373 ( -0.010773 0.010793 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49209e-06 ( -1.37426e-07 1.39238e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -101.316 sec. to 53.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.54060 ( -0.374433 0.797768 )
Epeak [keV] : 400.052 ( )
Norm@50keV : 1.102237E-03 ( -9.382970E-05 8.219306E-05) )
------------------------------------------------------------
Chi-Squared = 56.53397 using 59 PHA bins.
Reduced chi-squared = 1.009535 for 56 degrees of freedom
Null hypothesis probability = 0.455
Photon flux (15-150 keV) in 154.7 sec: 0.132324 ( -0.010769 0.010789 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.49218e-06 ( -1.37565e-07 1.39177e-07 ) ergs/cm2
Band function
Time interval is from -101.316 sec. to 53.356 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16383 ( -8.83617 3.94664 )
beta : -1.60944 ( -8.39056 0.163264 )
Epeak [keV] : 48.6679 ( -48.5679 708.550 )
Norm@50keV : 2.161265E-03 ( -2.161265E-03 163.258 )
------------------------------------------------------------
Chi-Squared = 56.23972 using 59 PHA bins.
Reduced chi-squared = 1.022540 for 55 degrees of freedom
Null hypothesis probability = 0.428
Photon flux (15-150 keV) in 154.7 sec: 0.132076 ( -0.011128 0.010838 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.48818e-06 ( -1.45503e-07 1.39991e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 40.420 sec. to 41.420 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68904 ( -0.237441 0.245860 )
Norm@50keV : 7.931884E-03 ( -1.243419E-03 1.212245E-03) )
------------------------------------------------------------
Chi-Squared = 48.75035 using 59 PHA bins.
Reduced chi-squared = 0.8552693 for 57 degrees of freedom
Null hypothesis probability = 0.773
Photon flux (15-150 keV) in 1.000 sec: 1.04944 ( -0.142063 0.14209 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.35223e-08 ( -1.19876e-08 1.22786e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 40.420 sec. to 41.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18415 ( -1.32546 0.973101 )
Epeak [keV] : 68.1962 ( -68.1862 9931.80 )
Norm@50keV : 1.556883E-02 ( -1.556883E-02 8.208999E-02) )
------------------------------------------------------------
Chi-Squared = 47.95939 using 59 PHA bins.
Reduced chi-squared = 0.8564177 for 56 degrees of freedom
Null hypothesis probability = 0.769
Photon flux (15-150 keV) in 1.000 sec: 1.03220 ( -0.146776 0.14565 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.91171e-08 ( -1.48384e-08 1.46367e-08 ) ergs/cm2
Band function
Time interval is from 40.420 sec. to 41.420 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.274806 ( -8.61921 4.50574 )
beta : -2.05311 ( -0.851220 0.433609 )
Epeak [keV] : 37.7993 ( -30.9962 63.7629 )
Norm@50keV : 0.154303 ( -1.24985 197.982 )
------------------------------------------------------------
Chi-Squared = 45.45845 using 59 PHA bins.
Reduced chi-squared = 0.8265173 for 55 degrees of freedom
Null hypothesis probability = 0.817
Photon flux (15-150 keV) in 1.000 sec: 1.03161 ( -0.149901 0.1401 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.75789e-08 ( -1.16311e-08 1.38778e-08 ) ergs/cm2
Plot creation:
Mon Jan 7 16:06:36 EST 2008