batgrbproduct Analysis for Trigger=163240
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): Wed Jan 9 18:19:43 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger163240/GCN5_download_cron
======================================================================
Trigger: 00163240 Segment: 000
BAT Trigger Time: 153264816 [s; MET]
Trigger Stop: 153264880 [s; MET]
UTC: 2005-11-09T21:33:36.169220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 5.8392175271281 Dec: 61.5782170486982 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 33281
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 33281
Flight Position: [ source = BAT ]
RA: 5.8392175271281 Dec: 61.5782170486982 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 5.81211840432938 Dec: 61.6407635064152 [deg; J2000]
{ 00h 23m 14.9s , +61d 38' 26.7" }
+/- 4.36820715931273 [arcmin] (estimated 90% radius based on SNR)
+/- 2.48718411584388 [arcmin] (formal 1-sigma fit error)
SNR: 3.7016852229384
RA = 0h 23m 14.9s (5.812118 deg.)
Dec = 61d 38' 27" (61.640764 deg.)
Angular difference between Flight and Ground position is 3.831593 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.081726 0.084032 0.013757 0.014060
0.029961 0.030810 0.027931 0.024660 [error]
Peak 0.081726 0.084032 0.013757 0.014060
0.029961 0.030810 0.027931 0.024660 [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 2.09e-08 3.16e-08 3.59e-08 7.78e-08 1.12e-07 1.66e-07 erg/cm2
Error 1.27e-08 1.40e-08 2.52e-08 1.30e-07 6.04e-08 1.50e-07 erg/cm2
Peak flux Power-law 2.05e-02 1.71e-02 9.71e-03 8.17e-03 5.09e-02 5.54e-02 ph/cm2/s
Error 1.27e-02 7.55e-03 6.59e-03 1.24e-02 2.25e-02 2.52e-02 ph/cm2/s
Fluence Cutoff-PL 2.00e-08 3.87e-08 2.38e-08 2.73e-09 8.49e-08 1.14e-07 erg/cm2
Error 1.37e-08 2.16e-08 3.12e-08 1.23e-07 6.63e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.93e-02 2.10e-02 6.88e-03 4.45e-04 4.76e-02 4.77e-02 ph/cm2/s
Error 1.39e-02 1.16e-02 8.38e-03 1.19e-02 1.80e-02 2.72e-02 ph/cm2/s
Fluence Band 2.08e-08 3.58e-08 3.11e-08 4.51e-08 1.04e-07 1.23e-07 erg/cm2
Error 1.34e-08 1.76e-08 2.96e-08 1.05e-07 6.06e-08 1.39e-07 erg/cm2
Peak flux Band 1.96e-02 1.96e-02 8.56e-03 5.01e-03 5.05e-02 5.28e-02 ph/cm2/s
Error 1.47e-02 1.03e-02 7.87e-03 8.44e-03 2.26e-02 2.49e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.816 0.867 - - 3.67e-04 2.79e-04 44.224 57
CPL 1.008 2.537 45.8 5000.0 1.18e-03 0.00e+00 44.064 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.816 0.867 - - 3.67e-04 2.79e-04 44.224 57
CPL 1.008 2.280 45.8 5000.0 1.18e-03 0.00e+00 44.064 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
5.8121 +61.6408 0.0521 26.1 6.1 0.2380 3.7 TRIG_00163240
------------------------------------------
Foreground time interval of the image:
0.000 33.069 (delta_t = 33.069 [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 0.000 sec. to 33.069 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81598 ( -0.803052 0.931331 )
Norm@50keV : 3.666438E-04 ( -3.666438E-04 1.909861E-04) )
------------------------------------------------------------
Chi-Squared = 44.22424 using 59 PHA bins.
Reduced chi-squared = 0.7758639 for 57 degrees of freedom
Null hypothesis probability = 0.892
Photon flux (15-150 keV) in 33.07 sec: 5.085545E-02 ( -0.0224547 0.0224554 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11593e-07 ( -5.73345e-08 6.34693e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00797 ( -4.00797 1.06697 )
Epeak [keV] : 45.8360 ( -45.8260 9954.16 )
Norm@50keV : 1.179685E-03 ( )
------------------------------------------------------------
Chi-Squared = 44.06430 using 59 PHA bins.
Reduced chi-squared = 0.7868626 for 56 degrees of freedom
Null hypothesis probability = 0.876
Photon flux (15-150 keV) in 33.07 sec: 4.757676E-02 ( -0.0111781 0.0248952 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49109e-08 ( -4.51584e-08 8.7486e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12670 ( -8.87330 6.12670 )
beta : -2.17215 ( -7.82785 1.10943 )
Epeak [keV] : 46.8221 ( -46.7221 9953.18 )
Norm@50keV : 9.946044E-04 ( -14.9035 12.7598 )
------------------------------------------------------------
Chi-Squared = 43.93754 using 59 PHA bins.
Reduced chi-squared = 0.7988643 for 55 degrees of freedom
Null hypothesis probability = 0.858
Photon flux (15-150 keV) in 33.07 sec: 5.050558E-02 ( -0.0221646 0.0229818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04098e-07 ( -5.85567e-08 6.27146e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.81598 ( -0.803052 0.931331 )
Norm@50keV : 3.666438E-04 ( -3.666438E-04 1.909861E-04) )
------------------------------------------------------------
Chi-Squared = 44.22424 using 59 PHA bins.
Reduced chi-squared = 0.7758639 for 57 degrees of freedom
Null hypothesis probability = 0.892
Photon flux (15-150 keV) in 33.07 sec: 5.085545E-02 ( -0.0224547 0.0224554 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11593e-07 ( -5.73345e-08 6.34693e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00797 ( -4.00797 0.551521 )
Epeak [keV] : 45.8360 ( -45.8260 9954.16 )
Norm@50keV : 1.179685E-03 ( )
------------------------------------------------------------
Chi-Squared = 44.06430 using 59 PHA bins.
Reduced chi-squared = 0.7868626 for 56 degrees of freedom
Null hypothesis probability = 0.876
Photon flux (15-150 keV) in 33.07 sec: 4.757676E-02 ( -0.0111781 0.0248952 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.49109e-08 ( -4.51584e-08 8.7486e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.069 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.12670 ( -8.87330 6.12670 )
beta : -2.17215 ( -7.82785 1.10943 )
Epeak [keV] : 46.8221 ( -46.7221 9953.18 )
Norm@50keV : 9.946044E-04 ( -14.9035 12.7598 )
------------------------------------------------------------
Chi-Squared = 43.93754 using 59 PHA bins.
Reduced chi-squared = 0.7988643 for 55 degrees of freedom
Null hypothesis probability = 0.858
Photon flux (15-150 keV) in 33.07 sec: 5.050558E-02 ( -0.0221646 0.0229818 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.04098e-07 ( -5.85567e-08 6.27146e-08 ) ergs/cm2
Plot creation:
Wed Jan 9 18:24:47 EST 2008