batgrbproduct Analysis for Trigger=116116
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): Sat Jan 5 01:16:04 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger116116/GCN5_download_cron
======================================================================
Trigger: 00116116 Segment: 000
BAT Trigger Time: 136718739.968 [s; MET]
Trigger Stop: 136718740.992 [s; MET]
UTC: 2005-05-02T09:25:40.464300 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 142.543472204572 Dec: 17.0020387304849 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13
Image Trigger?: NO
Rate S/N Ratio: 32.9089653438087 [ if not an image trigger ]
Image S/N Ratio: 13
Flight Position: [ source = BAT ]
RA: 142.543472204572 Dec: 17.0020387304849 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 142.537598124121 Dec: 16.9858285431438 [deg; J2000]
{ 09h 30m 09.0s , +16d 59' 09.0" }
+/- 1.27086427208852 [arcmin] (estimated 90% radius based on SNR)
+/- 0.475331868133449 [arcmin] (formal 1-sigma fit error)
SNR: 21.5975893440205
RA = 9h 30m 9.0s (142.537598 deg.)
Dec = 16d 59' 9" (16.985829 deg.)
Angular difference between Flight and Ground position is 1.029359 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 17.1760000288486 +/- 1.88200956816894
Measured from: -15.8680000007153
to: 1.30800002813339 [s; relative to TRIGTIME]
T50: 9.45600000023842 +/- 5.62439154648957
Measured from: -8.81999999284744
to: 0.636000007390976 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.215999990701675
to: 1.21599999070168 [s; relative to TRIGTIME]
Total Fluence
Measured from: -17.3199999928474
to: 3.17599999904633 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.249769 0.311927 0.208568 0.037116
0.020159 0.021091 0.018352 0.015844 [error]
Peak 0.049687 0.074218 0.056288 0.011911
0.004905 0.005527 0.004867 0.003688 [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 7.07e-08 1.23e-07 1.64e-07 4.46e-07 4.78e-07 7.98e-07 erg/cm2
Error 8.99e-09 9.61e-09 1.79e-08 1.04e-07 4.24e-08 1.19e-07 erg/cm2
Peak flux Power-law 4.37e-01 4.78e-01 3.73e-01 4.79e-01 1.47e+00 1.77e+00 ph/cm2/s
Error 6.23e-02 4.32e-02 3.81e-02 9.83e-02 1.24e-01 1.54e-01 ph/cm2/s
Fluence Cutoff-PL 6.81e-08 1.28e-07 1.65e-07 2.71e-07 4.65e-07 6.30e-07 erg/cm2
Error 1.02e-08 1.27e-08 1.90e-08 2.10e-07 4.94e-08 2.18e-07 erg/cm2
Peak flux Cutoff-PL 3.60e-01 5.35e-01 4.10e-01 1.65e-01 1.42e+00 1.47e+00 ph/cm2/s
Error 7.58e-02 5.68e-02 4.69e-02 1.03e-01 1.28e-01 1.59e-01 ph/cm2/s
Fluence Band 6.67e-08 1.30e-07 1.59e-07 3.82e-07 4.67e-07 7.01e-07 erg/cm2
Error 1.23e-08 1.84e-08 8.62e-08 4.32e-08 2.19e-07 0.00e+00 erg/cm2
Peak flux Band 3.53e-01 5.44e-01 3.98e-01 2.63e-01 1.42e+00 1.56e+00 ph/cm2/s
Error 8.01e-02 6.15e-02 5.08e-02 1.14e-01 1.27e-01 1.89e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.587 0.139 - - 2.49e-03 2.02e-04 54.579 57
CPL 1.196 0.515 95.7 4968.4 4.02e-03 0.00e+00 53.857 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.358 0.136 - - 1.22e-02 1.03e-03 59.510 57
CPL 0.225 0.733 78.2 28.6 4.58e-02 4.62e-02 50.316 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: 3.072000 sec.
T50 in the 50-300 keV band: 1.728000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 20.496 -17.320 3.176
T90 17.176 -15.868 1.308
T50 9.456 -8.820 0.636
Peak 1.000 0.216 1.216
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
142.5376 +16.9858 0.0089 10.2 38.5 0.8327 21.6 TRIG_00116116
------------------------------------------
Foreground time interval of the image:
-17.320 3.176 (delta_t = 20.496 [sec])
Background time interval of the image:
-299.968 -17.320 (delta_t = 282.648 [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 -17.320 sec. to 3.176 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.58740 ( -0.138522 0.139992 )
Norm@50keV : 2.488552E-03 ( -2.028923E-04 2.011165E-04) )
------------------------------------------------------------
Chi-Squared = 54.57856 using 59 PHA bins.
Reduced chi-squared = 0.9575185 for 57 degrees of freedom
Null hypothesis probability = 0.566
Photon flux (15-150 keV) in 20.50 sec: 0.318555 ( -0.024602 0.024622 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.7788e-07 ( -4.22423e-08 4.26441e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -17.320 sec. to 3.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19608 ( -0.539310 0.491258 )
Epeak [keV] : 95.6809 ( -32.4376 9904.32 )
Norm@50keV : 4.021651E-03 ( )
------------------------------------------------------------
Chi-Squared = 53.85674 using 59 PHA bins.
Reduced chi-squared = 0.9617275 for 56 degrees of freedom
Null hypothesis probability = 0.556
Photon flux (15-150 keV) in 20.50 sec: 0.314613 ( -0.013773 0.025607 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.64526e-07 ( -4.99298e-08 4.89581e-08 ) ergs/cm2
Band function
Time interval is from -17.320 sec. to 3.176 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.06207 ( -11.5045 1.98608 )
beta : -1.85370 ( -0.201251 0.215989 )
Epeak [keV] : 75.8509 ( -31.4653 475.819 )
Norm@50keV : 4.918429E-03 ( -7.45468 112.359 )
------------------------------------------------------------
Chi-Squared = 53.22298 using 59 PHA bins.
Reduced chi-squared = 0.9676906 for 55 degrees of freedom
Null hypothesis probability = 0.543
Photon flux (15-150 keV) in 20.50 sec: 0.314823 ( -0.025188 0.025071 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.6674e-07 ( -4.27179e-08 4.36261e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.216 sec. to 1.216 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.35798 ( -0.136323 0.136649 )
Norm@50keV : 1.215764E-02 ( -1.028324E-03 1.026238E-03) )
------------------------------------------------------------
Chi-Squared = 59.50997 using 59 PHA bins.
Reduced chi-squared = 1.044035 for 57 degrees of freedom
Null hypothesis probability = 0.384
Photon flux (15-150 keV) in 1.000 sec: 1.46707 ( -0.12395 0.12405 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.18478e-07 ( -1.1075e-08 1.1264e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.216 sec. to 1.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.225044 ( -0.795837 0.669263 )
Epeak [keV] : 78.1683 ( -14.6992 42.5489 )
Norm@50keV : 4.583079E-02 ( -2.452578E-02 6.787270E-02) )
------------------------------------------------------------
Chi-Squared = 50.31550 using 59 PHA bins.
Reduced chi-squared = 0.8984911 for 56 degrees of freedom
Null hypothesis probability = 0.689
Photon flux (15-150 keV) in 1.000 sec: 1.42158 ( -0.12834 0.12759 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.10518e-07 ( -1.23159e-08 1.2333e-08 ) ergs/cm2
Band function
Time interval is from 0.216 sec. to 1.216 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.719397E-02 ( -0.832161 1.34596 )
beta : -2.12476 ( -7.87524 0.525415 )
Epeak [keV] : 68.6804 ( -20.0898 40.1645 )
Norm@50keV : 6.571285E-02 ( -3.928381E-02 0.335461 )
------------------------------------------------------------
Chi-Squared = 49.53880 using 59 PHA bins.
Reduced chi-squared = 0.9007054 for 55 degrees of freedom
Null hypothesis probability = 0.683
Photon flux (15-150 keV) in 1.000 sec: 1.42230 ( -0.12958 0.12471 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.11624e-07 ( -1.093e-08 1.1744e-08 ) ergs/cm2
Plot creation:
Sat Jan 5 01:28:03 EST 2008