batgrbproduct Analysis for Trigger=357763
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): Mon Jul 20 07:51:52 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger357763/GCN5_download_cron
======================================================================
Trigger: 00357763 Segment: 000
BAT Trigger Time: 269714174.848 [s; MET]
Trigger Stop: 269714174.864 [s; MET]
UTC: 2009-07-19T16:36:09.923460 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 333.998029766331 Dec: 47.7231447231149 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.71
Image Trigger?: NO
Rate S/N Ratio: 6.70820393249937 [ if not an image trigger ]
Image S/N Ratio: 5.71
Flight Position: [ source = BAT ]
RA: 333.998029766331 Dec: 47.7231447231149 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 334.051713788376 Dec: 47.6775054160416 [deg; J2000]
{ 22h 16m 12.4s , +47d 40' 39.0" }
+/- 4.68825002973193 [arcmin] (estimated 90% radius based on SNR)
+/- 3.29447402241637 [arcmin] (formal 1-sigma fit error)
SNR: 3.34604342369941
Angular difference between Flight and Ground position is 3.492550 arcmin
Partial Coding Fraction: 0.703125 [ including projection effects ]
Duration
T90: 0.0160000324249268 +/-
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
T50: 0.0160000324249268 +/-
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0160000324249268 second)
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0160000324249268 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.004426 0.000486 0.000118 0.001248
0.001100 0.000966 0.000821 0.000648 [error]
Peak 0.004426 0.000486 0.000118 0.001248
0.001100 0.000966 0.000821 0.000648 [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 2.79e-10 1.73e-10 6.83e-11 3.59e-11 5.38e-10 5.68e-10 erg/cm2
Error 2.84e-10 2.04e-10 1.48e-10 4.05e-09 6.07e-10 2.19e-09 erg/cm2
Peak flux Power-law 5.88e-01 2.02e-01 3.99e-02 9.34e-03 8.36e-01 8.34e-01 ph/cm2/s
Error 5.97e-01 2.36e-01 8.39e-02 6.01e-01 8.54e-01 8.59e-01 ph/cm2/s
Fluence Cutoff-PL 4.26e-10 2.02e-10 3.50e-12 1.46e-16 6.32e-10 6.27e-10 erg/cm2
Error 3.84e-10 2.58e-10 5.67e-11 7.30e-12 5.30e-10 5.31e-10 erg/cm2
Peak flux Cutoff-PL 5.86e-01 2.04e-01 4.01e-02 9.27e-03 8.36e-01 8.38e-01 ph/cm2/s
Error 5.98e-01 2.37e-01 8.38e-02 6.78e-01 8.54e-01 8.59e-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 3.342 0.000 - - 2.34e-03 3.71e-03 45.710 57
CPL -4.967 0.000 19.3 8.1 1.26e+04 1.68e+04 43.460 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.342 0.000 - - 2.34e-03 3.71e-03 45.710 57
CPL -4.967 0.000 19.3 8.1 1.26e+04 1.68e+04 43.460 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 0.016 0.000 0.016
T90 0.016 0.000 0.016
T50 0.016 0.000 0.016
Peak 0.016 0.000 0.016
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
334.0517 +47.6775 0.0576 28.2 25.5 0.0057 3.3 TRIG_00357763
------------------------------------------
Foreground time interval of the image:
0.000 0.016 (delta_t = 0.016 [sec])
Background time interval of the image:
-60.848 -6.848 (delta_t = 54.000 [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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.34166 ( -3.34224 -3.34224 )
Norm@50keV : 2.34055E-03 ( -0.00234465 0.0050706 )
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 57 degrees of freedom
# Null hypothesis probability = 8.582528e-01
Photon flux (15-150 keV) in 0.016 sec: 0.835890 ( -0.83589 0.871883 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37718e-10 ( -5.37733e-10 6.76642e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.96698 ( )
Epeak [keV] : 19.3302 ( -6.34947 9.88028 )
Norm@50keV : 1.25795E+04 ( -12354.9 21161.6 )
------------------------------------------------------------
# Chi-Squared = 43.46 using 59 PHA bins.
# Reduced chi-squared = 0.7761 for 56 degrees of freedom
# Null hypothesis probability = 8.892498e-01
Photon flux (15-150 keV) in 0.016 sec: 0.835684 ( -0.835684 0.871896 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31973e-10 ( -5.11142e-10 5.49662e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.79850 ( 1.79826 1.79826 )
beta : -5.50955 ( 5.10507 7.43209 )
Epeak [keV] : 3.22185 ( -3.09853 -3.09853 )
Norm@50keV : 4.06731E-02 ( -0.0430697 0.172864 )
------------------------------------------------------------
# Chi-Squared = 45.19 using 59 PHA bins.
# Reduced chi-squared = 0.8216 for 55 degrees of freedom
# Null hypothesis probability = 8.245931e-01
Photon flux (15-150 keV) in 0.016 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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.34166 ( -3.34224 -3.34224 )
Norm@50keV : 2.34055E-03 ( -0.00234465 0.0050706 )
------------------------------------------------------------
# Chi-Squared = 45.71 using 59 PHA bins.
# Reduced chi-squared = 0.8020 for 57 degrees of freedom
# Null hypothesis probability = 8.582528e-01
Photon flux (15-150 keV) in 0.016 sec: 0.835890 ( -0.83589 0.871883 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.37718e-10 ( -5.37733e-10 6.76642e-10 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -4.96698 ( )
Epeak [keV] : 19.3302 ( -6.34947 9.88028 )
Norm@50keV : 1.25795E+04 ( -12354.9 21161.6 )
------------------------------------------------------------
# Chi-Squared = 43.46 using 59 PHA bins.
# Reduced chi-squared = 0.7761 for 56 degrees of freedom
# Null hypothesis probability = 8.892498e-01
Photon flux (15-150 keV) in 0.016 sec: 0.835684 ( -0.835684 0.871896 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.31973e-10 ( -5.11142e-10 5.49662e-10 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 0.016 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.79850 ( 1.79826 1.79826 )
beta : -5.50955 ( 5.10507 4.69537 )
Epeak [keV] : 3.22185 ( -3.09853 -3.09853 )
Norm@50keV : 4.06731E-02 ( -0.0430697 0.177748 )
------------------------------------------------------------
# Chi-Squared = 45.19 using 59 PHA bins.
# Reduced chi-squared = 0.8216 for 55 degrees of freedom
# Null hypothesis probability = 8.245931e-01
Photon flux (15-150 keV) in 0.016 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Mon Jul 20 08:02:59 EDT 2009