batgrbproduct Analysis for Trigger=165579
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 19:19:06 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger165579/GCN5_download_cron
======================================================================
Trigger: 00165579 Segment: 000
BAT Trigger Time: 154793202.432 [s; MET]
Trigger Stop: 154793202.944 [s; MET]
UTC: 2005-11-27T14:06:42.568400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 223.735692331568 Dec: 51.339811650515 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 33406
Image Trigger?: NO
Rate S/N Ratio: 5.47722557505166 [ if not an image trigger ]
Image S/N Ratio: 33406
Flight Position: [ source = BAT ]
RA: 223.735692331568 Dec: 51.339811650515 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 223.696847624982 Dec: 51.3322532836013 [deg; J2000]
{ 14h 54m 47.2s , +51d 19' 56.1" }
+/- 3.333771171041 [arcmin] (estimated 90% radius based on SNR)
+/- 1.7241938336219 [arcmin] (formal 1-sigma fit error)
SNR: 5.44586982693359
RA = 14h 54m 47.2s (223.696848 deg.)
Dec = 51d 19' 56" (51.332253 deg.)
Angular difference between Flight and Ground position is 1.525085 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 0.511999994516373 +/-
Measured from: 0
to: 0.511999994516373 [s; relative to TRIGTIME]
T50: 0.511999994516373 +/-
Measured from: 0
to: 0.511999994516373 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.511999994516373 second)
Measured from: 1.49011611938477e-08
to: 0.512000009417534 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.511999994516373 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total -0.000428 0.024289 0.012402 0.002832
0.004895 0.004807 0.004301 0.003621 [error]
Peak -0.000428 0.024289 0.012402 0.002832
0.004895 0.004807 0.004301 0.003621 [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 3.54e-09 6.72e-09 9.85e-09 3.08e-08 2.79e-08 4.87e-08 erg/cm2
Error 1.90e-09 2.35e-09 3.70e-09 2.44e-08 9.40e-09 2.73e-08 erg/cm2
Peak flux Power-law 2.23e-01 2.31e-01 1.69e-01 1.99e-01 7.01e-01 8.23e-01 ph/cm2/s
Error 1.22e-01 8.27e-02 6.21e-02 1.44e-01 2.35e-01 2.64e-01 ph/cm2/s
Fluence Cutoff-PL 2.01e-09 8.91e-09 1.08e-08 1.97e-09 2.35e-08 2.34e-08 erg/cm2
Error 1.78e-09 3.30e-09 5.46e-09 1.22e-08 9.36e-09 1.53e-08 erg/cm2
Peak flux Cutoff-PL 1.24e-01 2.95e-01 1.97e-01 2.05e-02 6.35e-01 6.37e-01 ph/cm2/s
Error 1.14e-01 1.16e-01 9.19e-02 8.48e-02 2.25e-01 2.31e-01 ph/cm2/s
Fluence Band 2.27e-09 8.92e-09 1.03e-08 8.95e-09 2.53e-08 3.39e-08 erg/cm2
Error 3.03e-09 4.20e-09 1.25e-08 9.15e-09 1.67e-08 0.00e+00 erg/cm2
Peak flux Band 1.41e-01 3.00e-01 1.87e-01 7.34e-02 6.57e-01 6.80e-01 ph/cm2/s
Error 1.00e-01 6.76e-02 1.26e-01 2.11e-01 2.55e-01 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.453 0.510 - - 5.69e-03 1.82e-03 61.054 57
CPL -1.726 2.133 57.1 69.2 2.25e-01 3.93e-01 57.744 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.453 0.510 - - 5.69e-03 1.82e-03 61.054 57
CPL -1.726 2.133 57.1 69.2 2.25e-01 3.93e-01 57.744 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 0.512 0.000 0.512
T90 0.512 0.000 0.512
T50 0.512 0.000 0.512
Peak 0.512 0.000 0.512
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
223.6968 +51.3323 0.0352 37.4 -3.6 0.0492 5.4 TRIG_00165579
------------------------------------------
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-60.432 -2.432 (delta_t = 58.000 [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.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45266 ( -0.513791 0.506530 )
Norm@50keV : 5.685891E-03 ( -1.825836E-03 1.823067E-03) )
------------------------------------------------------------
Chi-Squared = 61.05379 using 59 PHA bins.
Reduced chi-squared = 1.071119 for 57 degrees of freedom
Null hypothesis probability = 0.332
Photon flux (15-150 keV) in 0.5120 sec: 0.701099 ( -0.23355 0.236628 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78714e-08 ( -9.3374e-09 9.45582e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.72551 ( -1.27449 2.99156 )
Epeak [keV] : 57.0842 ( -15.2027 123.191 )
Norm@50keV : 0.225028 ( -0.225028 0.561968 )
------------------------------------------------------------
Chi-Squared = 57.74390 using 59 PHA bins.
Reduced chi-squared = 1.031141 for 56 degrees of freedom
Null hypothesis probability = 0.411
Photon flux (15-150 keV) in 0.5120 sec: 0.635221 ( -0.207474 0.243042 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35129e-08 ( -8.19005e-09 1.05289e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.76706 ( -2.87759 3.23294 )
beta : -2.79280 ( -7.20720 1.42758 )
Epeak [keV] : 54.0976 ( -21.5452 87.1950 )
Norm@50keV : 0.277858 ( -9.08846 3.30468 )
------------------------------------------------------------
Chi-Squared = 57.48751 using 59 PHA bins.
Reduced chi-squared = 1.045227 for 55 degrees of freedom
Null hypothesis probability = 0.383
Photon flux (15-150 keV) in 0.5120 sec: 0.657033 ( -0.205665 0.216721 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.53249e-08 ( -8.10066e-09 1.01991e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.45266 ( -0.513791 0.506530 )
Norm@50keV : 5.685891E-03 ( -1.825836E-03 1.823067E-03) )
------------------------------------------------------------
Chi-Squared = 61.05379 using 59 PHA bins.
Reduced chi-squared = 1.071119 for 57 degrees of freedom
Null hypothesis probability = 0.332
Photon flux (15-150 keV) in 0.5120 sec: 0.701099 ( -0.23355 0.236628 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.78714e-08 ( -9.3374e-09 9.45582e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.72551 ( -1.27449 2.99156 )
Epeak [keV] : 57.0842 ( -15.2027 123.191 )
Norm@50keV : 0.225028 ( -0.225028 0.561968 )
------------------------------------------------------------
Chi-Squared = 57.74390 using 59 PHA bins.
Reduced chi-squared = 1.031141 for 56 degrees of freedom
Null hypothesis probability = 0.411
Photon flux (15-150 keV) in 0.5120 sec: 0.635221 ( -0.207474 0.243042 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35129e-08 ( -8.19005e-09 1.05289e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.76706 ( -8.95636 3.23294 )
beta : -2.79280 ( -7.20720 1.42758 )
Epeak [keV] : 54.0976 ( -21.5452 87.1950 )
Norm@50keV : 0.277858 ( -9.08846 3.30468 )
------------------------------------------------------------
Chi-Squared = 57.48751 using 59 PHA bins.
Reduced chi-squared = 1.045227 for 55 degrees of freedom
Null hypothesis probability = 0.383
Photon flux (15-150 keV) in 0.5120 sec: 0.657033 ( -0.205665 0.216721 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.53249e-08 ( -8.10066e-09 1.01991e-08 ) ergs/cm2
Plot creation:
Wed Jan 9 19:23:52 EST 2008