batgrbproduct Analysis for Trigger=351588
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): Fri May 15 15:30:25 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger351588/SDC
======================================================================
Trigger: 00351588 Segment: 000
BAT Trigger Time: 263607785.216 [s; MET]
Trigger Stop: 263607785.472 [s; MET]
UTC: 2009-05-10T00:23:00.487940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 333.555035285725 Dec: -26.6056164508738 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.48
Image Trigger?: NO
Rate S/N Ratio: 145.485394455938 [ if not an image trigger ]
Image S/N Ratio: 7.48
Flight Position: [ source = BAT ]
RA: 333.555035285725 Dec: -26.6056164508738 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 333.570573047616 Dec: -26.6056489183676 [deg; J2000]
{ 22h 14m 16.9s , -26d 36' 20.3" }
+/- 2.06300433934099 [arcmin] (estimated 90% radius based on SNR)
+/- 0.924656543409972 [arcmin] (formal 1-sigma fit error)
SNR: 10.8101685041381
Angular difference between Flight and Ground position is 0.833551 arcmin
Partial Coding Fraction: 0.1621094 [ including projection effects ]
Duration
T90: 5.63199996948242 +/- 1.68030471172121
Measured from: 0.0160000026226044
to: 5.64799997210503 [s; relative to TRIGTIME]
T50: 2.30399996042252 +/- 1.53009280547122
Measured from: 0.0640000104904175
to: 2.36799997091293 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.00400000810623169
to: 1.00400000810623 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 6.22400000691414 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.151016 0.222778 0.262033 0.142957
0.036571 0.037955 0.035851 0.031888 [error]
Peak 0.072949 0.151427 0.193820 0.105313
0.018110 0.019687 0.021366 0.019747 [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 5.02e-08 1.14e-07 2.04e-07 8.61e-07 5.55e-07 1.22e-06 erg/cm2
Error 1.62e-08 2.17e-08 3.39e-08 3.41e-07 8.75e-08 3.54e-07 erg/cm2
Peak flux Power-law 8.79e-01 1.20e+00 1.21e+00 2.20e+00 3.99e+00 5.48e+00 ph/cm2/s
Error 2.32e-01 1.95e-01 1.64e-01 6.38e-01 5.17e-01 7.59e-01 ph/cm2/s
Fluence Cutoff-PL 5.43e-14 5.43e-14 5.43e-14 5.43e-14 5.43e-14 5.43e-14 erg/cm2
Error 3.11e+12 3.11e+12 3.11e+12 3.11e+12 3.11e+12 3.11e+12 erg/cm2
Peak flux Cutoff-PL 8.17e-02 8.17e-02 8.17e-02 8.17e-02 8.17e-02 8.17e-02 ph/cm2/s
Error 5.00e+23 5.00e+23 5.00e+23 5.00e+23 5.00e+23 5.00e+23 ph/cm2/s
Fluence Band 4.87e-08 1.13e-07 2.04e-07 8.57e-07 5.55e-07 1.18e-06 erg/cm2
Error 1.60e-08 2.16e-08 3.39e-08 4.60e-07 8.75e-08 4.11e-07 erg/cm2
Peak flux Band 6.83e-01 1.24e+00 1.34e+00 1.09e+00 3.86e+00 4.35e+00 ph/cm2/s
Error 2.90e-01 2.19e-01 2.17e-01 5.99e-01 5.47e-01 1.06e+00 ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.000 0.000 - - 0.00e+00 0.00e+00 0.000 0
CPL 0.000 0.000 0.0 0.0 0.00e+00 0.00e+00 0.000 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.000 0.000 - - 0.00e+00 0.00e+00 0.000 0
CPL 0.000 0.000 0.0 0.0 0.00e+00 0.00e+00 0.000 0
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: 0.256000 sec.
T50 in the 50-300 keV band: 0.192000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.224 0.000 6.224
T90 5.632 0.016 5.648
T50 2.304 0.064 2.368
Peak 1.000 0.004 1.004
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
333.5706 -26.6056 0.0177 46.1 20.3 0.8207 10.8 TRIG_00351588
------------------------------------------
Foreground time interval of the image:
0.000 6.224 (delta_t = 6.224 [sec])
Background time interval of the image:
-212.715 0.000 (delta_t = 212.715 [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 6.224 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 1.01338 ( -0.164977 0.16614 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 6.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 8.726250E-03 ( -0.00872625 1e+24 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 6.224 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 1.01290 ( -0.164842 0.16616 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 1.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 3.99010 ( -0.52586 0.50728 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 8.174166E-02 ( -0.0817417 1e+24 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : ( )
beta : ( )
Epeak [keV] : ( )
Norm@50keV : ( )
------------------------------------------------------------
Photon flux (15-150 keV) in sec: 3.85557 ( -0.54607 0.54818 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Jul 22 14:15:37 EDT 2009