batgrbproduct Analysis for Trigger=163204
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 18:14:09 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger163204/GCN5_download_cron
======================================================================
Trigger: 00163204 Segment: 000
BAT Trigger Time: 153246368 [s; MET]
Trigger Stop: 153246432 [s; MET]
UTC: 2005-11-09T16:26:08.169620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 180.548116989701 Dec: -53.9586579123375 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 33272
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 33272
Flight Position: [ source = BAT ]
RA: 180.548116989701 Dec: -53.9586579123375 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 180.571503473171 Dec: -53.9339497423563 [deg; J2000]
{ 12h 02m 17.2s , -53d 56' 02.2" }
+/- 5.27384614177724 [arcmin] (estimated 90% radius based on SNR)
+/- 2.98422615316324 [arcmin] (formal 1-sigma fit error)
SNR: 2.82818444360267
RA = 12h 2m 17.2s (180.571503 deg.)
Dec = -53d 56' 2" (-53.933950 deg.)
Angular difference between Flight and Ground position is 1.696993 arcmin
Partial Coding Fraction: 1 [ 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 0.103746 0.039763 0.032389 0.022450
0.027460 0.027787 0.025014 0.023688 [error]
Peak 0.103746 0.039763 0.032389 0.022450
0.027460 0.027787 0.025014 0.023688 [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 1.92e-08 2.60e-08 2.59e-08 4.65e-08 8.62e-08 1.18e-07 erg/cm2
Error 1.14e-08 1.27e-08 2.16e-08 8.98e-08 5.13e-08 1.15e-07 erg/cm2
Peak flux Power-law 1.94e-02 1.45e-02 7.24e-03 5.15e-03 4.36e-02 4.63e-02 ph/cm2/s
Error 1.18e-02 6.91e-03 6.79e-03 9.18e-03 2.00e-02 2.21e-02 ph/cm2/s
Fluence Cutoff-PL 1.88e-08 2.86e-08 2.28e-08 9.76e-09 7.71e-08 8.03e-08 erg/cm2
Error 1.21e-08 1.69e-08 2.49e-08 8.88e-08 5.50e-08 1.32e-07 erg/cm2
Peak flux Cutoff-PL 1.88e-02 1.60e-02 6.57e-03 1.44e-03 4.25e-02 4.28e-02 ph/cm2/s
Error 1.25e-02 9.35e-03 6.86e-03 8.88e-03 2.02e-02 2.29e-02 ph/cm2/s
Fluence Band 1.89e-08 2.90e-08 2.26e-08 2.37e-08 7.65e-08 1.04e-07 erg/cm2
Error 1.25e-08 1.49e-08 3.44e-08 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 1.92e-02 1.57e-02 6.74e-03 3.88e-03 4.36e-02 4.50e-02 ph/cm2/s
Error 1.52e-02 8.49e-03 6.62e-03 7.84e-03 2.03e-02 2.25e-02 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.005 0.994 - - 2.90e-04 2.34e-04 67.978 57
CPL 1.223 2.557 36.4 5000.0 9.04e-04 3.14e-01 67.851 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.005 0.994 - - 2.90e-04 2.34e-04 67.978 57
CPL 1.223 3.485 36.4 5000.0 9.04e-04 3.14e-01 67.851 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
180.5715 -53.9339 0.0679 13.4 168.0 0.1606 2.8 TRIG_00163204
------------------------------------------
Foreground time interval of the image:
0.000 28.149 (delta_t = 28.149 [sec])
29.000 33.090 (delta_t = 4.090 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 28.148700
29.000000 33.090100
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00500 ( -0.861506 1.12653 )
Norm@50keV : 2.899436E-04 ( -2.899436E-04 1.780070E-04) )
------------------------------------------------------------
Chi-Squared = 67.97843 using 59 PHA bins.
Reduced chi-squared = 1.192604 for 57 degrees of freedom
Null hypothesis probability = 0.151
Photon flux (15-150 keV) in 32.24 sec: 4.358971E-02 ( -0.0200256 0.0200475 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.62007e-08 ( -4.74499e-08 5.51875e-08 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 28.148700
29.000000 33.090100
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22284 ( -4.22284 0.890899 )
Epeak [keV] : 36.3722 ( -36.3622 9963.63 )
Norm@50keV : 9.037368E-04 ( -9.037367E-04 0.626683 )
------------------------------------------------------------
Chi-Squared = 67.85072 using 59 PHA bins.
Reduced chi-squared = 1.211620 for 56 degrees of freedom
Null hypothesis probability = 0.133
Photon flux (15-150 keV) in 32.24 sec: 4.249802E-02 ( -0.0201033 0.0202953 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.70501e-08 ( -4.70053e-08 6.30447e-08 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 28.148700
29.000000 33.090100
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29384 ( -8.70616 6.29384 )
beta : -2.52873 ( -7.47127 3.43689 )
Epeak [keV] : 35.3558 ( -35.2558 9964.64 )
Norm@50keV : 8.291795E-04 ( -4.08254 33.5916 )
------------------------------------------------------------
Chi-Squared = 67.83880 using 59 PHA bins.
Reduced chi-squared = 1.233433 for 55 degrees of freedom
Null hypothesis probability = 0.115
Photon flux (15-150 keV) in 32.24 sec: 4.357402E-02 ( -0.0204576 0.0202417 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64968e-08 ( -4.30626e-08 2.57669e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 29.000 sec. to 33.090 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.00500 ( -0.861506 1.12653 )
Norm@50keV : 2.899436E-04 ( -2.899436E-04 1.780070E-04) )
------------------------------------------------------------
Chi-Squared = 67.97843 using 59 PHA bins.
Reduced chi-squared = 1.192604 for 57 degrees of freedom
Null hypothesis probability = 0.151
Photon flux (15-150 keV) in 32.24 sec: 4.358971E-02 ( -0.0200256 0.0200475 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.62007e-08 ( -4.74499e-08 5.51875e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 29.000 sec. to 33.090 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.22284 ( -4.22284 2.74802 )
Epeak [keV] : 36.3722 ( -36.3622 9963.63 )
Norm@50keV : 9.037368E-04 ( -9.037367E-04 0.626683 )
------------------------------------------------------------
Chi-Squared = 67.85072 using 59 PHA bins.
Reduced chi-squared = 1.211620 for 56 degrees of freedom
Null hypothesis probability = 0.133
Photon flux (15-150 keV) in 32.24 sec: 4.249802E-02 ( -0.0201033 0.0202953 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.70501e-08 ( -4.70053e-08 6.30447e-08 ) ergs/cm2
Band function
Time interval is from 29.000 sec. to 33.090 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.29384 ( -8.70616 6.29384 )
beta : -2.52873 ( -7.47127 3.43689 )
Epeak [keV] : 35.3558 ( -35.2558 9964.64 )
Norm@50keV : 8.291795E-04 ( -4.08254 33.5916 )
------------------------------------------------------------
Chi-Squared = 67.83880 using 59 PHA bins.
Reduced chi-squared = 1.233433 for 55 degrees of freedom
Null hypothesis probability = 0.115
Photon flux (15-150 keV) in 32.24 sec: 4.357402E-02 ( -0.0204576 0.0202417 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.64968e-08 ( -4.30626e-08 2.57669e-08 ) ergs/cm2
Plot creation:
Wed Jan 9 18:18:56 EST 2008