batgrbproduct Analysis for Trigger=349719
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 v2.44
Process Start Time (local time): Wed Apr 22 11:58:51 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger349719/GCN5_download_cron
======================================================================
Trigger: 00349719 Segment: 000
BAT Trigger Time: 261992547.316 [s; MET]
Trigger Stop: 261992547.32 [s; MET]
UTC: 2009-04-21T07:42:22.639140 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 328.590859553953 Dec: -83.9240781015934 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.67
Image Trigger?: NO
Rate S/N Ratio: 7 [ if not an image trigger ]
Image S/N Ratio: 5.67
Flight Position: [ source = BAT ]
RA: 328.590859553953 Dec: -83.9240781015934 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 328.352417500312 Dec: -83.8792551718944 [deg; J2000]
{ 21h 53m 24.6s , -83d 52' 45.3" }
+/- 3.91745303605726 [arcmin] (estimated 90% radius based on SNR)
+/- 1.61415409557011 [arcmin] (formal 1-sigma fit error)
SNR: 4.32484050824924
Angular difference between Flight and Ground position is 3.089121 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.0039999783039093 +/-
Measured from: 0
to: 0.0039999783039093 [s; relative to TRIGTIME]
T50: 0.0039999783039093 +/-
Measured from: 0
to: 0.0039999783039093 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0039999783039093 second)
Measured from: 1.49011611938477e-08
to: 0.0039999932050705 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0039999783039093 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.001669 0.002291 0.000084 0.000139
0.000525 0.000643 0.000355 0.000536 [error]
Peak 0.001669 0.002291 0.000084 0.000139
0.000525 0.000643 0.000355 0.000536 [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 1.94e-10 6.83e-11 1.44e-11 3.44e-12 2.80e-10 2.69e-10 erg/cm2
Error 1.04e-10 8.60e-11 5.77e-11 9.60e-11 2.62e-10 2.43e-10 erg/cm2
Peak flux Power-law 1.66e+00 3.41e-01 3.48e-02 3.90e-03 2.04e+00 2.04e+00 ph/cm2/s
Error 1.41e+00 4.04e-01 1.31e-01 8.55e-02 1.75e+00 1.75e+00 ph/cm2/s
Fluence Cutoff-PL 2.78e-10 5.29e-11 1.33e-13 1.07e-19 3.24e-10 2.67e-10 erg/cm2
Error 1.68e-10 6.16e-11 3.30e-11 4.47e-14 2.68e-10 2.59e-10 erg/cm2
Peak flux Cutoff-PL 1.66e+00 2.80e-01 3.69e-04 1.42e-10 2.57e+00 2.04e+00 ph/cm2/s
Error 3.10e-01 7.76e-02 8.92e-04 1.21e+00 1.75e+00 0.00e+00 ph/cm2/s
Fluence Band 5.34e-11 6.17e-11 2.69e-12 3.06e-14 2.80e-10 4.18e-10 erg/cm2
Error 1.86e-11 4.28e-11 2.56e-10 4.16e-10 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 2.14e+00 3.01e-01 4.93e-03 7.77e-05 2.48e+00 2.14e+00 ph/cm2/s
Error 1.78e+00 2.90e-01 6.69e-02 2.41e-02 2.04e+00 0.00e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.290 3.277 - - 2.55e-03 5.91e-03 39.621 57
CPL -2.499 0.000 13.9 9.7 1.30e+03 2.98e+04 38.170 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 4.290 3.277 - - 2.55e-03 5.91e-03 39.621 57
CPL -2.499 0.000 13.9 9.7 1.30e+03 2.98e+04 38.170 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 0.004 0.000 0.004
T90 0.004 0.000 0.004
T50 0.004 0.000 0.004
Peak 0.004 0.000 0.004
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
328.3524 -83.8793 0.0442 11.7 6.5 0.0045 4.3 TRIG_00349719
------------------------------------------
Foreground time interval of the image:
0.000 0.004 (delta_t = 0.004 [sec])
Background time interval of the image:
-60.316 -3.316 (delta_t = 57.000 [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.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29012 ( -2.36466 4.18994 )
Norm@50keV : 2.551706E-03 ( -2.551706E-03 9.266376E-03) )
------------------------------------------------------------
Chi-Squared = 39.62132 using 59 PHA bins.
Reduced chi-squared = 0.6951108 for 57 degrees of freedom
Null hypothesis probability = 0.961
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.03568 ( -2.03568 1.46203 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79914e-10 ( -2.79914e-10 2.44414e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.49852 ( )
Epeak [keV] : 13.8918 ( -14.2911 5.01301 )
Norm@50keV : 1301.86 ( -3408.18 56279.9 )
------------------------------------------------------------
Chi-Squared = 38.16981 using 59 PHA bins.
Reduced chi-squared = 0.6816037 for 56 degrees of freedom
Null hypothesis probability = 0.967
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.57159 ( -0.81415 1.60447 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23941e-10 ( -3.23941e-10 2.11675e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.93591 ( -9.85281 5.14719 )
beta : -8.36794 ( -4.07784 3.47753 )
Epeak [keV] : 9.49582 ( -9.39544 9.74342 )
Norm@50keV : 1.155160E-02 ( -39960.1 126646. )
------------------------------------------------------------
Chi-Squared = 42.01280 using 59 PHA bins.
Reduced chi-squared = 0.7638690 for 55 degrees of freedom
Null hypothesis probability = 0.901
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.48084 ( -2.48084 1.59118 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.80428e-10 ( -2.80428e-10 2.32352e-10 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 4.29012 ( -2.36466 4.18994 )
Norm@50keV : 2.551706E-03 ( -2.551706E-03 9.266376E-03) )
------------------------------------------------------------
Chi-Squared = 39.62132 using 59 PHA bins.
Reduced chi-squared = 0.6951108 for 57 degrees of freedom
Null hypothesis probability = 0.961
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.03568 ( -2.03568 1.46203 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.79914e-10 ( -2.79914e-10 2.44414e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.49852 ( )
Epeak [keV] : 13.8918 ( -14.2911 5.01301 )
Norm@50keV : 1301.86 ( -3408.18 56279.9 )
------------------------------------------------------------
Chi-Squared = 38.16981 using 59 PHA bins.
Reduced chi-squared = 0.6816037 for 56 degrees of freedom
Null hypothesis probability = 0.967
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.57159 ( -0.81415 1.60447 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.23941e-10 ( -3.23941e-10 2.11675e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.004 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.93591 ( -9.85281 5.14719 )
beta : -8.36794 ( -4.07784 3.47753 )
Epeak [keV] : 9.49582 ( -9.39544 9.74342 )
Norm@50keV : 1.155160E-02 ( -39960.1 126646. )
------------------------------------------------------------
Chi-Squared = 42.01280 using 59 PHA bins.
Reduced chi-squared = 0.7638690 for 55 degrees of freedom
Null hypothesis probability = 0.901
Photon flux (15-150 keV) in 4.0000E-03 sec: 2.48084 ( -2.48084 1.59118 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.80428e-10 ( -2.80428e-10 2.32352e-10 ) ergs/cm2
Plot creation:
Wed Apr 22 12:05:54 EDT 2009