batgrbproduct Analysis for Trigger=153514
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 8 19:30:14 EST 2008
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger153514/GCN5_download_hand_taka
======================================================================
Trigger: 00153514 Segment: 000
BAT Trigger Time: 147491504 [s; MET]
Trigger Stop: 147491568 [s; MET]
UTC: 2005-09-04T01:51:44.290000 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 13.67015365989 Dec: 14.1381730057214 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.26
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 13.26
Flight Position: [ source = BAT ]
RA: 13.67015365989 Dec: 14.1381730057214 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 13.7630978745287 Dec: 14.1856605417924 [deg; J2000]
{ 00h 55m 03.1s , +14d 11' 08.4" }
+/- 2.90359077295038 [arcmin] (estimated 90% radius based on SNR)
+/- 1.62851689148555 [arcmin] (formal 1-sigma fit error)
SNR: 6.63410106537595
RA = 0h 55m 3.1s (13.763098 deg.)
Dec = 14d 11' 8" (14.185661 deg.)
Angular difference between Flight and Ground position is 6.111931 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 174.199999988079 +/- 10.7562158769084
Measured from: 24.4320000112057
to: 198.631999999285 [s; relative to TRIGTIME]
T50: 81.6920000016689 +/- 9.27342955784466
Measured from: 69.4000000059605
to: 151.092000007629 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 27.4399999976158
to: 28.4399999976158 [s; relative to TRIGTIME]
Total Fluence
Measured from: 17.0160000026226
to: 216.956000000238 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.686761 2.564129 2.285615 0.739883
0.077135 0.079767 0.072165 0.064507 [error]
Peak 0.015292 0.028759 0.027800 0.011626
0.006636 0.006908 0.006461 0.005850 [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 5.38e-07 1.10e-06 1.77e-06 6.35e-06 4.91e-06 9.75e-06 erg/cm2
Error 4.06e-08 4.81e-08 7.16e-08 6.08e-07 1.80e-07 6.37e-07 erg/cm2
Peak flux Power-law 1.49e-01 1.91e-01 1.79e-01 2.94e-01 6.17e-01 8.12e-01 ph/cm2/s
Error 8.13e-02 6.37e-02 5.05e-02 1.89e-01 1.69e-01 2.23e-01 ph/cm2/s
Fluence Cutoff-PL 5.11e-07 1.12e-06 1.81e-06 4.89e-06 4.87e-06 8.20e-06 erg/cm2
Error 5.21e-08 5.13e-08 8.56e-08 1.54e-06 1.91e-07 1.56e-06 erg/cm2
Peak flux Cutoff-PL 1.45e-01 1.92e-01 1.80e-01 2.70e-01 6.16e-01 7.67e-01 ph/cm2/s
Error 8.43e-02 8.15e-02 5.88e-02 2.61e-01 1.67e-01 2.87e-01 ph/cm2/s
Fluence Band 5.05e-07 1.11e-06 1.81e-06 4.89e-06 4.86e-06 8.30e-06 erg/cm2
Error 5.18e-08 5.12e-08 8.57e-08 1.54e-06 1.91e-07 1.53e-06 erg/cm2
Peak flux Band 1.22e-01 2.12e-01 1.81e-01 2.45e-01 6.04e-01 7.62e-01 ph/cm2/s
Error 8.46e-02 8.76e-02 5.42e-02 2.08e-01 1.72e-01 2.53e-01 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.318 0.067 - - 2.50e-03 8.81e-05 50.203 57
CPL 1.085 0.256 225.4 4930.4 3.16e-03 7.83e-04 48.322 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.094 0.485 - - 5.32e-03 1.40e-03 55.455 57
CPL 0.906 3.813 300.1 0.0 6.58e-03 1.41e-03 55.477 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: 187.776000 sec.
T50 in the 50-300 keV band: 86.464000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 199.940 17.016 216.956
T90 174.200 24.432 198.632
T50 81.692 69.400 151.092
Peak 1.000 27.440 28.440
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
13.7631 +14.1857 0.0291 35.1 13.2 1.2011 6.6 TRIG_00153514
------------------------------------------
Foreground time interval of the image:
17.016 73.901 (delta_t = 56.885 [sec])
Background time interval of the image:
-2.499 17.016 (delta_t = 19.515 [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 17.016 sec. to 216.956 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.31806 ( -6.688297E-02 6.644964E-02) )
Norm@50keV : 2.498910E-03 ( -8.811266E-05 8.801464E-05) )
------------------------------------------------------------
Chi-Squared = 50.20316 using 59 PHA bins.
Reduced chi-squared = 0.8807571 for 57 degrees of freedom
Null hypothesis probability = 0.726
Photon flux (15-150 keV) in 199.9 sec: 0.299142 ( -0.011659 0.0117 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.91494e-06 ( -1.7995e-07 1.8035e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 17.016 sec. to 216.956 sec.
Parameters : value lower 90% higher 90%
Photon index: 1.08494 ( -0.246081 0.265084 )
Epeak [keV] : 225.440 ( -86.1642 9774.56 )
Norm@50keV : 3.164994E-03 ( -6.987534E-04 8.675875E-04) )
------------------------------------------------------------
Chi-Squared = 48.32248 using 59 PHA bins.
but latest trial 1.35002 gives Chi-Squared = 2.58824
but latest trial 2.499236E-03 gives Chi-Squared = 1.83968
Reduced chi-squared = 0.8629014 for 56 degrees of freedom
Null hypothesis probability = 0.757
Photon flux (15-150 keV) in 199.9 sec: 0.295289 ( -0.012538 0.012525 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86756e-06 ( -1.91604e-07 1.90525e-07 ) ergs/cm2
Band function
Time interval is from 17.016 sec. to 216.956 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.787421 ( -11.8549 0.940225 )
beta : -1.34896 ( -7.518446E-02 9.295189E-02) )
Epeak [keV] : 76.4755 ( -32.1733 632.096 )
Norm@50keV : 5.379839E-03 ( -18.4408 71.9315 )
------------------------------------------------------------
Chi-Squared = 48.80538 using 59 PHA bins.
Reduced chi-squared = 0.8873705 for 55 degrees of freedom
Null hypothesis probability = 0.709
Photon flux (15-150 keV) in 199.9 sec: 0.295274 ( -0.012529 0.01256 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.86419e-06 ( -1.91864e-07 1.90705e-07 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 27.440 sec. to 28.440 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09436 ( -0.510038 0.459289 )
Norm@50keV : 5.321645E-03 ( -1.410704E-03 1.392299E-03) )
------------------------------------------------------------
Chi-Squared = 55.45506 using 59 PHA bins.
Reduced chi-squared = 0.9728959 for 57 degrees of freedom
Null hypothesis probability = 0.533
Photon flux (15-150 keV) in 1.000 sec: 0.616957 ( -0.168036 0.169464 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.57522e-08 ( -1.53979e-08 1.55743e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 27.440 sec. to 28.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.906229 ( -2.75019 4.87535 )
Epeak [keV] : 300.050 ( )
Norm@50keV : 6.579830E-03 ( -1.424014E-03 1.389198E-03) )
------------------------------------------------------------
Chi-Squared = 55.47686 using 59 PHA bins.
Reduced chi-squared = 0.9906583 for 56 degrees of freedom
Null hypothesis probability = 0.495
Photon flux (15-150 keV) in 1.000 sec: 0.615507 ( -0.166677 0.166792 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.53406e-08 ( -1.53611e-08 7.9875e-09 ) ergs/cm2
Band function
Time interval is from 27.440 sec. to 28.440 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.251944 ( -9.74806 5.25194 )
beta : -1.29712 ( -8.70288 0.669960 )
Epeak [keV] : 90.8427 ( -90.7427 470.300 )
Norm@50keV : 1.520478E-02 ( -13.6626 24.2939 )
------------------------------------------------------------
Chi-Squared = 55.06139 using 59 PHA bins.
Reduced chi-squared = 1.001116 for 55 degrees of freedom
Null hypothesis probability = 0.472
Photon flux (15-150 keV) in 1.000 sec: 0.604218 ( -0.172 0.172048 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.57448e-08 ( -1.85967e-08 1.5555e-08 ) ergs/cm2
Plot creation:
Tue Jan 8 19:46:48 EST 2008