batgrbproduct Analysis for Trigger=106106
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): Fri Jan 4 20:42:14 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger106106/SDC
======================================================================
Trigger: 00106106 Segment: 000
BAT Trigger Time: 130126527.936 [s; MET]
Trigger Stop: 130126536.128 [s; MET]
UTC: 2005-02-15T02:15:28.543100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 348.395966865516 Dec: 49.325242203474 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9
Image Trigger?: NO
Rate S/N Ratio: 10.295630140987 [ if not an image trigger ]
Image S/N Ratio: 9
Flight Position: [ source = BAT ]
RA: 348.395966865516 Dec: 49.325242203474 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 348.410230131053 Dec: 49.3265050960414 [deg; J2000]
{ 23h 13m 38.5s , +49d 19' 35.4" }
+/- 2.60321512903222 [arcmin] (estimated 90% radius based on SNR)
+/- 1.74360977827833 [arcmin] (formal 1-sigma fit error)
SNR: 7.75412112270607
RA = 23h 13m 38.5s (348.410230 deg.)
Dec = 49d 19' 35" (49.326505 deg.)
Angular difference between Flight and Ground position is 0.562894 arcmin
Partial Coding Fraction: 0.640625 [ including projection effects ]
Duration
T90: 87.2920000106096 +/- 17.882407101936
Measured from: 0.491999998688698
to: 87.7840000092983 [s; relative to TRIGTIME]
T50: 55.9120000004768 +/- 8.78119194457452
Measured from: 6.67599999904633
to: 62.5879999995232 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.61999998986721
to: 6.61999998986721 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.324000000953674
to: 98.3279999941587 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.284156 0.401520 0.317462 0.159941
0.051657 0.051275 0.044109 0.038184 [error]
Peak 0.016987 0.017647 0.024390 0.010273
0.005517 0.005597 0.005031 0.004346 [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 9.19e-08 1.73e-07 2.51e-07 7.73e-07 7.11e-07 1.30e-06 erg/cm2
Error 2.33e-08 2.49e-08 4.55e-08 3.24e-07 1.08e-07 3.53e-07 erg/cm2
Peak flux Power-law 9.87e-02 1.44e-01 1.55e-01 3.14e-01 4.94e-01 7.12e-01 ph/cm2/s
Error 5.61e-02 4.99e-02 3.85e-02 1.79e-01 1.29e-01 1.90e-01 ph/cm2/s
Fluence Cutoff-PL 9.20e-08 1.73e-07 2.51e-07 7.66e-07 7.11e-07 1.29e-06 erg/cm2
Error 2.33e-08 2.49e-08 4.55e-08 3.22e-07 1.08e-07 3.50e-07 erg/cm2
Peak flux Cutoff-PL 8.47e-02 1.45e-01 1.65e-01 2.04e-01 4.85e-01 6.00e-01 ph/cm2/s
Error 6.71e-02 5.50e-02 3.81e-02 2.29e-01 9.90e-02 2.57e-01 ph/cm2/s
Fluence Band 8.79e-08 1.71e-07 2.55e-07 8.23e-07 7.16e-07 1.34e-06 erg/cm2
Error 1.16e-08 2.25e-08 3.36e-08 1.16e-07 9.55e-08 1.76e-07 erg/cm2
Peak flux Band 8.48e-02 1.45e-01 1.65e-01 2.04e-01 4.85e-01 6.00e-01 ph/cm2/s
Error 6.71e-02 5.67e-02 5.00e-02 2.31e-01 1.33e-01 2.64e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.464 0.264 - - 7.56e-04 1.02e-04 51.058 57
CPL 1.462 0.267 9987.8 0.0 7.50e-04 1.03e-04 51.097 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.885 0.460 - - 4.31e-03 1.13e-03 52.241 57
CPL 0.382 4.112 197.0 5000.0 6.97e-03 1.08e-02 51.977 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: 8.832000 sec.
T50 in the 50-300 keV band: 5.504000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 98.652 -0.324 98.328
T90 87.292 0.492 87.784
T50 55.912 6.676 62.588
Peak 1.000 5.620 6.620
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
348.4102 +49.3265 0.0248 24.4 -68.0 0.6543 7.8 TRIG_00106106
------------------------------------------
Foreground time interval of the image:
-0.324 51.165 (delta_t = 51.489 [sec])
Background time interval of the image:
-119.936 -0.324 (delta_t = 119.612 [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 -0.324 sec. to 98.328 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46438 ( -0.264848 0.263979 )
Norm@50keV : 7.555243E-04 ( -1.024883E-04 1.015314E-04) )
------------------------------------------------------------
Chi-Squared = 51.05825 using 59 PHA bins.
Reduced chi-squared = 0.8957587 for 57 degrees of freedom
Null hypothesis probability = 0.696
Photon flux (15-150 keV) in 98.65 sec: 9.344405E-02 ( -0.0127913 0.0128299 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.11385e-07 ( -1.07284e-07 1.08433e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.324 sec. to 98.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.46206 ( -0.267295 0.266542 )
Epeak [keV] : 9987.84 ( )
Norm@50keV : 7.496972E-04 ( -1.031606E-04 1.020879E-04) )
------------------------------------------------------------
Chi-Squared = 51.09741 using 59 PHA bins.
Reduced chi-squared = 0.9124537 for 56 degrees of freedom
Null hypothesis probability = 0.661
Photon flux (15-150 keV) in 98.65 sec: 9.340506E-02 ( -0.0127872 0.0128259 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.11213e-07 ( -1.07172e-07 1.08646e-07 ) ergs/cm2
Band function
Time interval is from -0.324 sec. to 98.328 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.10858 ( -8.89142 3.74710 )
beta : -1.46003 ( -0.288850 0.261080 )
Epeak [keV] : 44.6696 ( -44.5696 9955.33 )
Norm@50keV : 1.553681E-03 ( -1.553681E-03 311.873 )
------------------------------------------------------------
Chi-Squared = 51.06581 using 59 PHA bins.
Reduced chi-squared = 0.9284693 for 55 degrees of freedom
Null hypothesis probability = 0.626
Photon flux (15-150 keV) in 98.65 sec: 9.265326E-02 ( ) ph/cm2/s
Energy fluence (15-150 keV) : 7.15544e-07 ( -9.46596e-08 9.62469e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 5.620 sec. to 6.620 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.885323 ( -0.488886 0.431506 )
Norm@50keV : 4.307833E-03 ( -1.155492E-03 1.109782E-03) )
------------------------------------------------------------
Chi-Squared = 52.24109 using 59 PHA bins.
Reduced chi-squared = 0.9165103 for 57 degrees of freedom
Null hypothesis probability = 0.654
Photon flux (15-150 keV) in 1.000 sec: 0.494406 ( -0.128013 0.129911 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86312e-08 ( -1.22381e-08 1.23126e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.620 sec. to 6.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.382293 ( -2.47302 5.75068 )
Epeak [keV] : 196.951 ( -196.941 9803.05 )
Norm@50keV : 6.971774E-03 ( -6.971774E-03 1.471479E-02) )
------------------------------------------------------------
Chi-Squared = 51.97693 using 59 PHA bins.
Reduced chi-squared = 0.9281594 for 56 degrees of freedom
Null hypothesis probability = 0.628
Photon flux (15-150 keV) in 1.000 sec: 0.485173 ( -0.131731 0.06636 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.79282e-08 ( -1.28977e-08 1.26436e-08 ) ergs/cm2
Band function
Time interval is from 5.620 sec. to 6.620 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 3.360195E-02 ( -14.8316 0.168351 )
beta : -0.978316 ( -0.706541 0.451530 )
Epeak [keV] : 84.1988 ( -35.0425 9964.86 )
Norm@50keV : 1.481986E-02 ( -11.4278 84.8914 )
------------------------------------------------------------
Chi-Squared = 51.99203 using 59 PHA bins.
Reduced chi-squared = 0.9453097 for 55 degrees of freedom
Null hypothesis probability = 0.590
Photon flux (15-150 keV) in 1.000 sec: 0.485168 ( -0.131734 0.133268 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.79004e-08 ( -1.28778e-08 1.26574e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 20:51:25 EST 2008