batgrbproduct Analysis for Trigger=358534
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 v2.45
Process Start Time (local time): Tue Jul 28 08:56:08 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger358534/GCN5_download_cron
======================================================================
Trigger: 00358534 Segment: 000
BAT Trigger Time: 270441409.24 [s; MET]
Trigger Stop: 270441409.248 [s; MET]
UTC: 2009-07-28T02:36:44.291920 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 90.6287692822525 Dec: -69.0871092652265 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.66
Image Trigger?: NO
Rate S/N Ratio: 7.07106781186548 [ if not an image trigger ]
Image S/N Ratio: 5.66
Flight Position: [ source = BAT ]
RA: 90.6287692822525 Dec: -69.0871092652265 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 90.4885487377137 Dec: -69.085016518929 [deg; J2000]
{ 06h 01m 57.3s , -69d 05' 06.1" }
+/- 3.92097279094857 [arcmin] (estimated 90% radius based on SNR)
+/- 2.53121142308853 [arcmin] (formal 1-sigma fit error)
SNR: 4.31929543757168
Angular difference between Flight and Ground position is 3.005855 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 0.00800001621246338 +/-
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
T50: 0.00800001621246338 +/-
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.00800001621246338 second)
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.00800001621246338 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003288 0.000682 0.000325 0.000445
0.000807 0.000409 0.000348 0.000382 [error]
Peak 0.003288 0.000682 0.000325 0.000445
0.000807 0.000409 0.000348 0.000382 [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 6.44e-11 2.72e-11 6.80e-12 2.09e-12 9.96e-11 1.00e-10 erg/cm2
Error 7.70e-11 2.79e-11 4.49e-11 1.33e-09 1.06e-10 1.06e-10 erg/cm2
Peak flux Power-law 2.74e-01 6.60e-02 8.26e-03 1.15e-03 3.49e-01 3.50e-01 ph/cm2/s
Error 3.32e-01 6.74e-02 4.68e-02 5.21e-01 3.93e-01 3.93e-01 ph/cm2/s
Fluence Cutoff-PL 1.55e-10 4.68e-11 3.23e-13 2.04e-18 2.00e-10 1.96e-10 erg/cm2
Error 1.45e-10 3.97e-11 1.10e-11 2.10e-13 1.83e-10 1.83e-10 erg/cm2
Peak flux Cutoff-PL 6.21e-01 1.24e-01 5.02e-04 1.89e-09 7.46e-01 7.45e-01 ph/cm2/s
Error 5.99e-01 1.11e-01 1.18e-02 5.27e-04 6.44e-01 6.45e-01 ph/cm2/s
Fluence Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 erg/cm2
Peak flux Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 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 3.998 0.000 - - 5.66e-04 1.08e-03 40.530 57
CPL -4.979 0.000 18.3 0.0 1.50e+04 0.00e+00 37.480 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.998 0.000 - - 5.66e-04 1.08e-03 40.530 57
CPL -4.979 0.000 18.3 0.0 1.50e+04 0.00e+00 37.480 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 0.008 0.000 0.008
T90 0.008 0.000 0.008
T50 0.008 0.000 0.008
Peak 0.008 0.000 0.008
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
90.4885 -69.0850 0.0444 1.9 -41.4 0.0042 4.3 TRIG_00358534
------------------------------------------
Foreground time interval of the image:
0.000 0.008 (delta_t = 0.008 [sec])
Background time interval of the image:
-60.240 -1.240 (delta_t = 59.000 [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 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.99811 ( -3.99811 -3.99811 )
Norm@50keV : 5.66051E-04 ( -0.000566051 0.00160256 )
------------------------------------------------------------
# Chi-Squared = 40.53 using 59 PHA bins.
# Reduced chi-squared = 0.7111 for 57 degrees of freedom
# Null hypothesis probability = 9.513559e-01
Photon flux (15-150 keV) in 0.008 sec: 0.348511 ( -0.348511 0.437384 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.9616e-11 ( -9.9616e-11 1.11535e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.97883 ( )
Epeak [keV] : 18.2763 ( )
Norm@50keV : 1.50302E+04 ( )
------------------------------------------------------------
# Chi-Squared = 37.48 using 59 PHA bins.
# Reduced chi-squared = 0.6693 for 56 degrees of freedom
# Null hypothesis probability = 9.729814e-01
Photon flux (15-150 keV) in 0.008 sec: 0.746131 ( -0.625814 0.663149 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99729e-10 ( -1.99729e-10 1.65965e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.31989 ( -6.24174 1.66256 )
beta : -9.99999 ( 464199 464199 )
Epeak [keV] : 17.9424 ( -8.87544 6.30135 )
Norm@50keV : 4432.14 ( -4149.84 9984.23 )
------------------------------------------------------------
# Chi-Squared = 37.86 using 59 PHA bins.
# Reduced chi-squared = 0.6883 for 55 degrees of freedom
# Null hypothesis probability = 9.623255e-01
Photon flux (15-150 keV) in 0.008 sec: ( ) 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 0.008 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.99811 ( -3.99811 -3.99811 )
Norm@50keV : 5.66051E-04 ( -0.000566051 0.00160256 )
------------------------------------------------------------
# Chi-Squared = 40.53 using 59 PHA bins.
# Reduced chi-squared = 0.7111 for 57 degrees of freedom
# Null hypothesis probability = 9.513559e-01
Photon flux (15-150 keV) in 0.008 sec: 0.348511 ( -0.348511 0.437384 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.9616e-11 ( -9.9616e-11 1.11535e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.97883 ( )
Epeak [keV] : 18.2763 ( )
Norm@50keV : 1.50302E+04 ( )
------------------------------------------------------------
# Chi-Squared = 37.48 using 59 PHA bins.
# Reduced chi-squared = 0.6693 for 56 degrees of freedom
# Null hypothesis probability = 9.729814e-01
Photon flux (15-150 keV) in 0.008 sec: 0.746131 ( -0.625814 0.663149 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.99729e-10 ( -1.99729e-10 1.65965e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.008 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.31989 ( -6.24174 1.66256 )
beta : -9.99999 ( 464199 464199 )
Epeak [keV] : 17.9424 ( -8.87537 6.30133 )
Norm@50keV : 4432.14 ( -4149.84 9984.23 )
------------------------------------------------------------
# Chi-Squared = 37.86 using 59 PHA bins.
# Reduced chi-squared = 0.6883 for 55 degrees of freedom
# Null hypothesis probability = 9.623255e-01
Photon flux (15-150 keV) in 0.008 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Jul 28 09:24:20 EDT 2009