batgrbproduct Analysis for Trigger=358708
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): Fri Jul 31 04:44:27 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger358708/GCN5_download_cron
======================================================================
Trigger: 00358708 Segment: 000
BAT Trigger Time: 270663119.296 [s; MET]
Trigger Stop: 270663119.36 [s; MET]
UTC: 2009-07-30T16:11:54.340740 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 202.839647263766 Dec: 68.5765747524408 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.68
Image Trigger?: NO
Rate S/N Ratio: 6.6332495807108 [ if not an image trigger ]
Image S/N Ratio: 5.68
Flight Position: [ source = BAT ]
RA: 202.839647263766 Dec: 68.5765747524408 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 202.835010958992 Dec: 68.51973654543 [deg; J2000]
{ 13h 31m 20.4s , +68d 31' 11.1" }
+/- 4.45258723747309 [arcmin] (estimated 90% radius based on SNR)
+/- 2.24570253836938 [arcmin] (formal 1-sigma fit error)
SNR: 3.60187953773118
Angular difference between Flight and Ground position is 3.411810 arcmin
Partial Coding Fraction: 0.875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.007754 0.002235 -0.001001 -0.000187
0.001556 0.001411 0.001307 0.001315 [error]
Peak 0.007754 0.002235 -0.001001 -0.000187
0.001556 0.001411 0.001307 0.001315 [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 1.21e-09 7.65e-10 3.13e-10 1.74e-10 2.37e-09 2.45e-09 erg/cm2
Error 5.64e-10 3.87e-10 3.10e-10 2.67e-10 8.16e-10 1.16e-09 erg/cm2
Peak flux Power-law 6.31e-01 2.26e-01 4.63e-02 1.12e-02 9.11e-01 9.15e-01 ph/cm2/s
Error 2.98e-01 1.12e-01 3.82e-02 1.77e-02 3.99e-01 4.01e-01 ph/cm2/s
Fluence Cutoff-PL 1.60e-09 1.19e-09 4.94e-11 1.24e-14 2.84e-09 2.83e-09 erg/cm2
Error 6.45e-10 6.17e-10 1.31e-10 3.28e-12 1.12e-09 1.12e-09 erg/cm2
Peak flux Cutoff-PL 8.02e-01 3.74e-01 9.09e-03 1.31e-06 1.18e+00 1.18e+00 ph/cm2/s
Error 3.32e-01 1.73e-01 2.12e-02 2.85e-04 4.36e-01 4.36e-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 3.288 0.806 - - 2.67e-03 2.28e-03 62.610 57
CPL 1.000 0.000 50.0 0.0 8.07e-03 0.00e+00 71.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.288 0.806 - - 2.67e-03 2.28e-03 62.610 57
CPL 1.000 0.000 50.0 0.0 8.07e-03 0.00e+00 71.050 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 0.064 0.000 0.064
T90 0.064 0.000 0.064
T50 0.064 0.000 0.064
Peak 0.064 0.000 0.064
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
202.8350 +68.5197 0.0534 15.3 -110.5 0.0100 3.6 TRIG_00358708
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.296 -7.296 (delta_t = 53.000 [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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.28846 ( -0.700185 0.912779 )
Norm@50keV : 2.66518E-03 ( -0.00266518 0.00190005 )
------------------------------------------------------------
# Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.840286e-01
Photon flux (15-150 keV) in 0.064 sec: 0.910957 ( -0.398856 0.399133 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37247e-09 ( -5.35201e-10 1.09748e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.07199E-03 ( )
------------------------------------------------------------
# Chi-Squared = 71.05 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 56 degrees of freedom
# Null hypothesis probability = 8.480155e-02
Photon flux (15-150 keV) in 0.064 sec: 1.18480 ( -0.436492 0.43647 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.84052e-09 ( -1.09552e-09 1.1379e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99916 ( -2282.95 -2278.1 )
beta : -5.65640 ( 5.11836 1.56259 )
Epeak [keV] : 21.7603 ( -3.73658 4.71949 )
Norm@50keV : 5319.28 ( -4136.74 14687 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.668327e-01
Photon flux (15-150 keV) in 0.064 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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.28846 ( -0.700185 0.912779 )
Norm@50keV : 2.66518E-03 ( -0.00266518 0.00190005 )
------------------------------------------------------------
# Chi-Squared = 62.61 using 59 PHA bins.
# Reduced chi-squared = 1.098 for 57 degrees of freedom
# Null hypothesis probability = 2.840286e-01
Photon flux (15-150 keV) in 0.064 sec: 0.910957 ( -0.398856 0.399133 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.37247e-09 ( -5.35201e-10 1.09748e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 8.07199E-03 ( )
------------------------------------------------------------
# Chi-Squared = 71.05 using 59 PHA bins.
# Reduced chi-squared = 1.269 for 56 degrees of freedom
# Null hypothesis probability = 8.480155e-02
Photon flux (15-150 keV) in 0.064 sec: 1.18480 ( -0.436492 0.43647 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.84052e-09 ( -1.09552e-09 1.1379e-09 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.064 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99916 ( -2293.09 -2278.1 )
beta : -5.65640 ( 5.11836 1.56259 )
Epeak [keV] : 21.7603 ( -3.73658 4.71949 )
Norm@50keV : 5319.28 ( -4136.74 14687 )
------------------------------------------------------------
# Chi-Squared = 55.21 using 59 PHA bins.
# Reduced chi-squared = 1.004 for 55 degrees of freedom
# Null hypothesis probability = 4.668327e-01
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Jul 31 04:55:16 EDT 2009