batgrbproduct Analysis for Trigger=111529
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 21:53:04 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger111529/SDC
======================================================================
Trigger: 00111529 Segment: 000
BAT Trigger Time: 132853476.608 [s; MET]
Trigger Stop: 132853477.12 [s; MET]
UTC: 2005-03-18T15:44:37.170860 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 49.6782870708762 Dec: -46.4033764015338 [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: 16.8226038412607 [ if not an image trigger ]
Image S/N Ratio: 9
Flight Position: [ source = BAT ]
RA: 49.6782870708762 Dec: -46.4033764015338 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 49.6968152911604 Dec: -46.3883262934076 [deg; J2000]
{ 03h 18m 47.2s , -46d 23' 18.0" }
+/- 0.995659712396116 [arcmin] (estimated 90% radius based on SNR)
+/- 0.41568710004175 [arcmin] (formal 1-sigma fit error)
SNR: 30.6067379330726
RA = 3h 18m 47.2s (49.696815 deg.)
Dec = -46d 23' 18" (-46.388326 deg.)
Angular difference between Flight and Ground position is 1.184591 arcmin
Partial Coding Fraction: 0.6640625 [ including projection effects ]
Duration
T90: 14.8200000077486 +/- 10.9664574115296
Measured from: 4.72800000011921
to: 19.5480000078678 [s; relative to TRIGTIME]
T50: 8.64000001549721 +/- 1.62966499820496
Measured from: 7.59600000083447
to: 16.2360000163317 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 28.5799999982119
to: 29.5799999982119 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.61999998986721
to: 29.7160000056028 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.700221 0.845766 0.434018 0.052344
0.030492 0.031850 0.028519 0.027383 [error]
Peak 0.112830 0.157610 0.103663 0.016488
0.007002 0.007613 0.006688 0.005223 [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 2.35e-07 3.38e-07 3.62e-07 7.19e-07 1.16e-06 1.65e-06 erg/cm2
Error 1.92e-08 1.68e-08 2.83e-08 1.18e-07 6.45e-08 1.42e-07 erg/cm2
Peak flux Power-law 1.19e+00 1.10e+00 6.97e-01 6.81e-01 3.27e+00 3.66e+00 ph/cm2/s
Error 1.17e-01 6.73e-02 5.50e-02 1.08e-01 1.97e-01 2.16e-01 ph/cm2/s
Fluence Cutoff-PL 2.14e-07 3.61e-07 3.58e-07 2.60e-07 1.08e-06 1.19e-06 erg/cm2
Error 2.27e-08 2.17e-08 3.19e-08 1.55e-07 7.70e-08 1.74e-07 erg/cm2
Peak flux Cutoff-PL 1.05e+00 1.18e+00 7.33e-01 3.07e-01 3.16e+00 3.27e+00 ph/cm2/s
Error 1.40e-01 8.35e-02 6.33e-02 1.37e-01 2.05e-01 2.47e-01 ph/cm2/s
Fluence Band 2.11e-07 3.60e-07 3.58e-07 2.59e-07 1.08e-06 1.24e-06 erg/cm2
Error 2.25e-08 2.17e-08 3.18e-08 1.55e-07 7.69e-08 3.03e-07 erg/cm2
Peak flux Band 1.07e+00 1.18e+00 7.33e-01 3.08e-01 3.16e+00 3.30e+00 ph/cm2/s
Error 1.42e-01 8.35e-02 6.33e-02 1.37e-01 2.05e-01 2.02e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.903 0.097 - - 4.15e-03 2.33e-04 56.609 57
CPL 1.219 0.434 51.3 11.2 9.72e-03 5.58e-03 47.994 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.652 0.103 - - 2.50e-02 1.55e-03 64.295 57
CPL 0.882 0.459 70.3 20.9 6.27e-02 3.60e-02 54.436 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: 9.024000 sec.
T50 in the 50-300 keV band: 5.248000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 30.336 -0.620 29.716
T90 14.820 4.728 19.548
T50 8.640 7.596 16.236
Peak 1.000 28.580 29.580
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
49.6968 -46.3883 0.0062 22.2 -78.8 2.0558 30.6 TRIG_00111529
------------------------------------------
Foreground time interval of the image:
-0.620 29.716 (delta_t = 30.336 [sec])
Background time interval of the image:
-299.608 -0.620 (delta_t = 298.988 [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 -0.620 sec. to 29.716 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90251 ( -9.633160E-02 9.785438E-02) )
Norm@50keV : 4.150651E-03 ( -2.342374E-04 2.318891E-04) )
------------------------------------------------------------
Chi-Squared = 56.60904 using 59 PHA bins.
Reduced chi-squared = 0.9931410 for 57 degrees of freedom
Null hypothesis probability = 0.490
Photon flux (15-150 keV) in 30.34 sec: 0.596299 ( -0.030675 0.030743 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.15779e-06 ( -6.42753e-08 6.4785e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.620 sec. to 29.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.21857 ( -0.456168 0.411173 )
Epeak [keV] : 51.2516 ( -7.63853 14.8574 )
Norm@50keV : 9.723822E-03 ( -3.828554E-03 7.334322E-03) )
------------------------------------------------------------
Chi-Squared = 47.99374 using 59 PHA bins.
Reduced chi-squared = 0.8570310 for 56 degrees of freedom
Null hypothesis probability = 0.768
Photon flux (15-150 keV) in 30.34 sec: 0.572500 ( -0.033506 0.03355 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08195e-06 ( -7.64871e-08 7.7452e-08 ) ergs/cm2
Band function
Time interval is from -0.620 sec. to 29.716 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.21864 ( -0.411126 0.456635 )
beta : -9.36331 ( -0.636689 7.38393 )
Epeak [keV] : 51.2415 ( -7.63619 14.8449 )
Norm@50keV : 9.722087E-03 ( -3.827955E-03 7.337810E-03) )
------------------------------------------------------------
Chi-Squared = 47.99353 using 59 PHA bins.
Reduced chi-squared = 0.8726096 for 55 degrees of freedom
Null hypothesis probability = 0.737
Photon flux (15-150 keV) in 30.34 sec: 0.572489 ( -0.033508 0.033581 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.08051e-06 ( -7.61807e-08 7.76643e-08 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 28.580 sec. to 29.580 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.65239 ( -0.102253 0.103460 )
Norm@50keV : 2.500323E-02 ( -1.553107E-03 1.545193E-03) )
------------------------------------------------------------
Chi-Squared = 64.29479 using 59 PHA bins.
Reduced chi-squared = 1.127979 for 57 degrees of freedom
Null hypothesis probability = 0.236
Photon flux (15-150 keV) in 1.000 sec: 3.26737 ( -0.19688 0.19714 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.3226e-07 ( -1.5062e-08 1.5603e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.580 sec. to 29.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.881926 ( -0.481726 0.435349 )
Epeak [keV] : 70.3010 ( -11.6083 30.2569 )
Norm@50keV : 6.265732E-02 ( -2.488784E-02 4.718920E-02) )
------------------------------------------------------------
Chi-Squared = 54.43579 using 59 PHA bins.
Reduced chi-squared = 0.9720677 for 56 degrees of freedom
Null hypothesis probability = 0.534
Photon flux (15-150 keV) in 1.000 sec: 3.16371 ( -0.20514 0.20524 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20308e-07 ( -1.6747e-08 1.6895e-08 ) ergs/cm2
Band function
Time interval is from 28.580 sec. to 29.580 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.883364 ( -0.433905 0.483259 )
beta : -9.11127 ( -0.888729 4.52271 )
Epeak [keV] : 70.3457 ( -11.6514 30.2361 )
Norm@50keV : 6.253879E-02 ( -2.477437E-02 4.736643E-02) )
------------------------------------------------------------
Chi-Squared = 54.43578 using 59 PHA bins.
Reduced chi-squared = 0.9897414 for 55 degrees of freedom
Null hypothesis probability = 0.496
Photon flux (15-150 keV) in 1.000 sec: 3.16392 ( -0.20539 0.20514 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.20254e-07 ( -1.6861e-08 1.6747e-08 ) ergs/cm2
Plot creation:
Fri Jan 4 22:02:48 EST 2008