batgrbproduct Analysis for Trigger=362404
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): Sat Sep 12 05:20:14 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger362404/GCN5_download_cron
======================================================================
Trigger: 00362404 Segment: 000
BAT Trigger Time: 274377321.216 [s; MET]
Trigger Stop: 274377321.728 [s; MET]
UTC: 2009-09-11T15:55:16.139480 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 72.3857863841622 Dec: 31.5043441121949 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.91
Image Trigger?: NO
Rate S/N Ratio: 56.7538544946508 [ if not an image trigger ]
Image S/N Ratio: 5.91
Flight Position: [ source = BAT ]
RA: 72.3857863841622 Dec: 31.5043441121949 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 72.4004705264683 Dec: 31.505667681602 [deg; J2000]
{ 04h 49m 36.1s , +31d 30' 20.4" }
+/- 4.23214808423236 [arcmin] (estimated 90% radius based on SNR)
+/- 2.84488232277691 [arcmin] (formal 1-sigma fit error)
SNR: 3.87285684089131
Angular difference between Flight and Ground position is 0.755363 arcmin
Partial Coding Fraction: 0.7890625 [ including projection effects ]
Duration
T90: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
T50: 0.51199996471405 +/-
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.51199996471405 second)
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.51199996471405 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.003622 0.018644 0.015660 -0.002706
0.004582 0.004554 0.004118 0.003480 [error]
Peak 0.003622 0.018644 0.015660 -0.002706
0.004582 0.004554 0.004118 0.003480 [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 2.73e-09 5.71e-09 9.36e-09 3.46e-08 2.58e-08 5.23e-08 erg/cm2
Error 1.54e-09 2.10e-09 3.52e-09 2.77e-08 9.04e-09 3.01e-08 erg/cm2
Peak flux Power-law 1.71e-01 1.95e-01 1.60e-01 2.19e-01 6.06e-01 7.45e-01 ph/cm2/s
Error 9.80e-02 7.34e-02 5.87e-02 1.60e-01 2.07e-01 2.50e-01 ph/cm2/s
Fluence Cutoff-PL 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 Cutoff-PL 1.12e-01 2.25e-01 1.89e-01 5.77e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 1.16e-01 9.55e-02 7.91e-02 2.29e-01 0.00e+00 0.00e+00 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 1.22e-01 2.16e-01 1.87e-01 6.10e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 9.40e-02 8.87e-02 2.49e-01 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 1.289 0.518 - - 5.09e-03 1.68e-03 66.510 57
CPL -0.687 2.916 71.1 -25.9 4.53e-02 2.02e+00 63.890 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.289 0.518 - - 5.09e-03 1.68e-03 66.510 57
CPL -0.687 2.916 71.1 -25.9 4.53e-02 2.02e+00 63.890 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 0.512 0.000 0.512
T90 0.512 0.000 0.512
T50 0.512 0.000 0.512
Peak 0.512 0.000 0.512
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
72.4005 +31.5057 0.0495 31.5 -173.0 0.0335 3.9 TRIG_00362404
------------------------------------------
Foreground time interval of the image:
0.000 0.512 (delta_t = 0.512 [sec])
Background time interval of the image:
-60.216 -9.216 (delta_t = 51.000 [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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28913 ( -0.527049 0.508964 )
Norm@50keV : 5.09184E-03 ( -0.00167833 0.00167818 )
------------------------------------------------------------
# Chi-Squared = 66.51 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.821302e-01
Photon flux (15-150 keV) in 0.512 sec: 0.606167 ( -0.205824 0.208489 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58365e-08 ( -8.94234e-09 9.13106e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.687443 ( -3.75159 2.07959 )
Epeak [keV] : 71.1057 ( -19.2339 -71.0805 )
Norm@50keV : 4.53434E-02 ( -0.0455657 3.9895 )
------------------------------------------------------------
# Chi-Squared = 63.89 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 56 degrees of freedom
# Null hypothesis probability = 2.190399e-01
Photon flux (15-150 keV) in 0.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.717626 ( -4.15558 4.66007 )
beta : -10.00000 ( 4.25308e+09 4.25308e+09 )
Epeak [keV] : 70.8119 ( -25.0257 -70.9978 )
Norm@50keV : 4.64811E-02 ( -0.0457523 2.78816 )
------------------------------------------------------------
# Chi-Squared = 63.89 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.924965e-01
Photon flux (15-150 keV) in 0.512 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 0.512 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.28913 ( -0.527049 0.508964 )
Norm@50keV : 5.09184E-03 ( -0.00167833 0.00167818 )
------------------------------------------------------------
# Chi-Squared = 66.51 using 59 PHA bins.
# Reduced chi-squared = 1.167 for 57 degrees of freedom
# Null hypothesis probability = 1.821302e-01
Photon flux (15-150 keV) in 0.512 sec: 0.606167 ( -0.205824 0.208489 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.58365e-08 ( -8.94234e-09 9.13106e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -0.687443 ( -3.75159 2.07959 )
Epeak [keV] : 71.1057 ( -19.2339 -71.0805 )
Norm@50keV : 4.53434E-02 ( -0.0455657 3.9895 )
------------------------------------------------------------
# Chi-Squared = 63.89 using 59 PHA bins.
# Reduced chi-squared = 1.141 for 56 degrees of freedom
# Null hypothesis probability = 2.190399e-01
Photon flux (15-150 keV) in 0.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.512 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.717626 ( -4.15558 4.66007 )
beta : -10.00000 ( 4.25308e+09 4.25308e+09 )
Epeak [keV] : 70.8119 ( -25.0257 -70.9978 )
Norm@50keV : 4.64811E-02 ( -0.0457523 2.78192 )
------------------------------------------------------------
# Chi-Squared = 63.89 using 59 PHA bins.
# Reduced chi-squared = 1.162 for 55 degrees of freedom
# Null hypothesis probability = 1.924965e-01
Photon flux (15-150 keV) in 0.512 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sat Sep 12 05:28:00 EDT 2009