batgrbproduct Analysis for Trigger=349396
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): Thu Apr 16 21:04:53 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid2/prebascript/trigger349396/GCN5_download_cron
======================================================================
Trigger: 00349396 Segment: 000
BAT Trigger Time: 261589483.824 [s; MET]
Trigger Stop: 261589483.856 [s; MET]
UTC: 2009-04-16T15:44:39.159880 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 268.658080215331 Dec: 36.4011407754619 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.62
Image Trigger?: NO
Rate S/N Ratio: 7.21110255092798 [ if not an image trigger ]
Image S/N Ratio: 5.62
Flight Position: [ source = BAT ]
RA: 268.658080215331 Dec: 36.4011407754619 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 268.706404357582 Dec: 36.4623160361348 [deg; J2000]
{ 17h 54m 49.5s , +36d 27' 44.3" }
+/- 6.93185194137761 [arcmin] (estimated 90% radius based on SNR)
+/- 5.39605711782056 [arcmin] (formal 1-sigma fit error)
SNR: 1.91383778990973
Angular difference between Flight and Ground position is 4.349094 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
T50: 0.0320000052452087 +/-
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0320000052452087 second)
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0320000052452087 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.005627 0.000202 -0.001170 -0.000866
0.001062 0.000915 0.000865 0.000728 [error]
Peak 0.005627 0.000202 -0.001170 -0.000866
0.001062 0.000915 0.000865 0.000728 [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 8.08e-10 3.69e-10 9.96e-11 3.38e-11 1.30e-09 0.00e+00 erg/cm2
Error 3.52e-10 2.57e-10 1.43e-10 9.25e-11 7.13e-10 0.00e+00 erg/cm2
Peak flux Power-law 8.60e-01 2.22e-01 3.02e-02 4.63e-03 1.11e+00 0.00e+00 ph/cm2/s
Error 3.70e-01 1.59e-01 4.21e-02 1.17e-02 5.20e-01 0.00e+00 ph/cm2/s
Fluence Cutoff-PL 1.14e-09 4.37e-10 4.92e-12 8.46e-17 1.59e-09 0.00e+00 erg/cm2
Error 4.14e-10 3.36e-10 3.59e-11 3.41e-13 6.63e-10 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.59e-01 2.22e-01 3.02e-02 4.61e-03 1.11e+00 0.00e+00 ph/cm2/s
Error 3.70e-01 1.59e-01 4.21e-02 1.16e-02 5.22e-01 0.00e+00 ph/cm2/s
Fluence Band 1.00e-09 5.19e-10 3.45e-11 4.91e-12 1.67e-09 1.42e-09 erg/cm2
Error 3.83e-10 3.59e-10 5.67e-11 6.58e-10 7.17e-10 0.00e+00 erg/cm2
Peak flux Band 2.42e-01 3.45e-03 1.06e-05 3.29e-08 2.45e-01 0.00e+00 ph/cm2/s
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+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 1.500 6.500 - - 0.00e+00 0.00e+00 71.803 57
CPL -2.410 0.000 17.4 11.1 1.60e+02 9.86e+02 51.466 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.500 6.500 - - 0.00e+00 0.00e+00 71.803 57
CPL -2.410 0.000 17.4 11.1 1.60e+02 9.86e+02 51.466 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 0.032 0.000 0.032
T90 0.032 0.000 0.032
T50 0.032 0.000 0.032
Peak 0.032 0.000 0.032
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
268.7064 +36.4623 0.1012 15.0 -33.9 0.0034 1.9 TRIG_00349396
------------------------------------------
Foreground time interval of the image:
0.000 0.032 (delta_t = 0.032 [sec])
Background time interval of the image:
-60.824 -3.824 (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 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 71.80325 using 59 PHA bins.
Reduced chi-squared = 1.259706 for 57 degrees of freedom
Null hypothesis probability = 8.962E-02
Photon flux (15-150 keV) in 3.2000E-02 sec: 1.11479 ( -0.513992 0.52509 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29804e-09 ( -6.62029e-10 7.64675e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.41044 ( )
Epeak [keV] : 17.3969 ( -17.6517 4.63307 )
Norm@50keV : 160.317 ( -489.859 1481.58 )
------------------------------------------------------------
Chi-Squared = 51.46624 using 59 PHA bins.
Reduced chi-squared = 0.9190400 for 56 degrees of freedom
Null hypothesis probability = 0.647
Photon flux (15-150 keV) in 3.2000E-02 sec: 1.11453 ( -0.513809 0.52953 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5935e-09 ( -6.3209e-10 6.94496e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -4.49537 9.21659 )
Norm@50keV : 0.00000 ( -10511.3 17598.5 )
------------------------------------------------------------
Chi-Squared = 71.80325 using 59 PHA bins.
Reduced chi-squared = 1.305514 for 55 degrees of freedom
Null hypothesis probability = 6.361E-02
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.245090 ( 1e+24 1e+24 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66566e-09 ( -6.61626e-10 6.54522e-10 ) ergs/cm2
Peak spectrum fit using the pre-slew DRM
Power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50000 ( -4.50000 8.50000 )
Norm@50keV : 0.00000 ( )
------------------------------------------------------------
Chi-Squared = 71.80325 using 59 PHA bins.
Reduced chi-squared = 1.259706 for 57 degrees of freedom
Null hypothesis probability = 8.962E-02
Photon flux (15-150 keV) in 3.2000E-02 sec: 1.11479 ( -0.513992 0.52509 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29804e-09 ( -6.62029e-10 7.64675e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.41044 ( )
Epeak [keV] : 17.3969 ( -17.6517 4.63307 )
Norm@50keV : 160.317 ( -489.859 1481.58 )
------------------------------------------------------------
Chi-Squared = 51.46624 using 59 PHA bins.
Reduced chi-squared = 0.9190400 for 56 degrees of freedom
Null hypothesis probability = 0.647
Photon flux (15-150 keV) in 3.2000E-02 sec: 1.11453 ( -0.513809 0.52953 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5935e-09 ( -6.3209e-10 6.94496e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.032 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.983950 ( -9.01605 5.98395 )
beta : -2.50000 ( -7.50000 12.5000 )
Epeak [keV] : 80.0000 ( -7.91886 9.21659 )
Norm@50keV : 0.00000 ( -10511.3 17598.5 )
------------------------------------------------------------
Chi-Squared = 71.80325 using 59 PHA bins.
Reduced chi-squared = 1.305514 for 55 degrees of freedom
Null hypothesis probability = 6.361E-02
Photon flux (15-150 keV) in 3.2000E-02 sec: 0.245090 ( 1e+24 1e+24 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.66566e-09 ( -6.61626e-10 6.54522e-10 ) ergs/cm2
Plot creation:
Thu Apr 16 21:21:10 EDT 2009