batgrbproduct Analysis for Trigger=216122
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 19:10:46 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger216122/GCN5_download_cron
======================================================================
Trigger: 00216122 Segment: 000
BAT Trigger Time: 173040744 [s; MET]
Trigger Stop: 173040808 [s; MET]
UTC: 2006-06-26T18:52:22.719800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 330.118452160516 Dec: 9.71528057600105 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.06
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.06
Flight Position: [ source = BAT ]
RA: 330.118452160516 Dec: 9.71528057600105 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 330.120496198589 Dec: 9.71850228717781 [deg; J2000]
{ 22h 00m 28.9s , +09d 43' 06.6" }
+/- 43.1277937386675 [arcmin] (estimated 90% radius based on SNR)
+/- 80.2421837258925 [arcmin] (formal 1-sigma fit error)
SNR: 0.14052412563581
RA = 22h 0m 28.9s (330.120496 deg.)
Dec = 9d 43' 7" (9.718502 deg.)
Angular difference between Flight and Ground position is 0.227988 arcmin
Partial Coding Fraction: 0.953125 [ 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 0.017153 -0.007374 -0.012399 -0.003754
0.010889 0.010817 0.009773 0.008797 [error]
Peak 0.017153 -0.007374 -0.012399 -0.003754
0.010889 0.010817 0.009773 0.008797 [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 2.63e-09 4.82e-10 4.25e-11 4.06e-12 3.16e-09 0.00e+00 erg/cm2
Error 3.58e-09 1.86e-09 1.99e-09 1.51e-07 5.62e-09 0.00e+00 erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 4.18e-03 1.28e-03 7.66e-04 1.45e-02 5.14e-03 1.51e-02 ph/cm2/s
Fluence Cutoff-PL 2.62e-09 4.82e-10 4.25e-11 4.03e-12 3.16e-09 0.00e+00 erg/cm2
Error 3.58e-09 1.87e-09 2.23e-09 1.79e-07 5.62e-09 0.00e+00 erg/cm2
Peak flux Cutoff-PL 0.00e+00 2.26e-04 4.85e-08 4.77e-16 4.15e-03 0.00e+00 ph/cm2/s
Error 1.04e-03 2.86e-05 3.35e-07 5.02e-03 5.15e-03 0.00e+00 ph/cm2/s
Fluence Band 4.87e-14 4.77e-10 4.22e-11 4.02e-12 3.13e-09 0.00e+00 erg/cm2
Error 1.86e-09 2.40e-09 7.73e-07 5.60e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 2.99e-02 4.71e-04 0.00e+00 ph/cm2/s
Error 4.14e-03 7.60e-04 8.41e-04 5.87e-02 5.31e-03 3.11e-03 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 2.19e-05 51.074 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 0.00e+00 51.074 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 2.19e-05 51.074 57
CPL 1.000 6.500 50.0 5000.0 0.00e+00 0.00e+00 51.074 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
330.1205 +9.7185 1.3682 21.8 -171.3 0.0072 0.1 TRIG_00216122
------------------------------------------
Foreground time interval of the image:
0.000 33.054 (delta_t = 33.054 [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 33.054 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 4.377323E-05) )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.8960407 for 57 degrees of freedom
Null hypothesis probability = 0.696
Photon flux (15-150 keV) in 33.05 sec: 0.00000 ( 0 0.0102827 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16182e-09 ( -3.16182e-09 8.08499e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.054 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.9120415 for 56 degrees of freedom
Null hypothesis probability = 0.661
Photon flux (15-150 keV) in 33.05 sec: 4.154334E-03 ( -0.00415433 0.0058821 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16263e-09 ( -3.16263e-09 8.08287e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.054 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -9.869955E-02 0.131599 )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.9286240 for 55 degrees of freedom
Null hypothesis probability = 0.625
Photon flux (15-150 keV) in 33.05 sec: 4.713860E-04 ( -0.000471386 0.0101438 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12881e-09 ( -3.12881e-09 8.06992e-09 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 33.054 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( 0.00000 4.377323E-05) )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.8960407 for 57 degrees of freedom
Null hypothesis probability = 0.696
Photon flux (15-150 keV) in 33.05 sec: 0.00000 ( 0 0.0102827 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16182e-09 ( -3.16182e-09 8.08499e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 33.054 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( -4.00000 9.00000 )
Epeak [keV] : 50.0000 ( -49.9900 9950.00 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.9120415 for 56 degrees of freedom
Null hypothesis probability = 0.661
Photon flux (15-150 keV) in 33.05 sec: 4.154334E-03 ( -0.00415433 0.0058821 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.16263e-09 ( -3.16263e-09 8.08287e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 33.054 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -79.9000 9920.00 )
Norm@50keV : 0.00000 ( -9.869955E-02 0.131599 )
------------------------------------------------------------
Chi-Squared = 51.07432 using 59 PHA bins.
Reduced chi-squared = 0.9286240 for 55 degrees of freedom
Null hypothesis probability = 0.625
Photon flux (15-150 keV) in 33.05 sec: 4.713860E-04 ( -0.000471386 0.0101438 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.12881e-09 ( -3.12881e-09 8.06992e-09 ) ergs/cm2
Plot creation:
Tue Jan 1 19:15:20 EST 2008