batgrbproduct Analysis for Trigger=355288
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): Sun Jun 21 08:47:34 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355288/GCN5_download_cron
======================================================================
Trigger: 00355288 Segment: 000
BAT Trigger Time: 267225137.728 [s; MET]
Trigger Stop: 267225138.752 [s; MET]
UTC: 2009-06-20T21:12:12.884140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 114.020849427568 Dec: -34.9150752543401 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.07
Image Trigger?: NO
Rate S/N Ratio: 13 [ if not an image trigger ]
Image S/N Ratio: 6.07
Flight Position: [ source = BAT ]
RA: 114.020849427568 Dec: -34.9150752543401 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 114.112215607023 Dec: -35.0004655286839 [deg; J2000]
{ 07h 36m 26.9s , -35d 00' 01.7" }
+/- 4.54212504777834 [arcmin] (estimated 90% radius based on SNR)
+/- 3.19129803224938 [arcmin] (formal 1-sigma fit error)
SNR: 3.50087680153582
Angular difference between Flight and Ground position is 6.814352 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
T50: 1.02400001883507 +/-
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1.02400001883507 second)
Measured from: 1.49011611938477e-08
to: 1.02400003373623 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1.02400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000074 -0.001814 0.008424 0.021065
0.005550 0.005954 0.005836 0.006579 [error]
Peak 0.000074 -0.001814 0.008424 0.021065
0.005550 0.005954 0.005836 0.006579 [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 3.24e-11 4.04e-10 4.59e-09 4.02e-07 2.09e-08 4.07e-07 erg/cm2
Error 1.74e-10 8.90e-10 4.78e-09 3.45e-07 1.82e-08 3.49e-07 erg/cm2
Peak flux Power-law 9.61e-04 6.22e-03 3.54e-02 9.50e-01 1.18e-01 9.91e-01 ph/cm2/s
Error 5.29e-03 1.44e-02 3.78e-02 8.07e-01 1.09e-01 8.37e-01 ph/cm2/s
Fluence Cutoff-PL 2.58e-11 3.54e-10 4.44e-09 4.57e-07 2.12e-08 4.61e-07 erg/cm2
Error 1.58e-10 8.30e-10 4.71e-09 3.93e-07 1.85e-08 3.97e-07 erg/cm2
Peak flux Cutoff-PL 7.65e-04 5.43e-03 3.41e-02 1.07e+00 1.18e-01 1.11e+00 ph/cm2/s
Error 4.81e-03 1.36e-02 3.72e-02 9.09e-01 1.08e-01 9.37e-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 -1.457 1.154 - - 4.02e-04 6.21e-04 78.100 57
CPL -2.870 -0.191 788.6 0.0 2.82e-04 2.94e-03 77.210 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.457 1.154 - - 4.02e-04 6.21e-04 78.100 57
CPL -2.870 -0.191 788.6 0.0 2.82e-04 2.94e-03 77.210 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 1.024 0.000 1.024
T90 1.024 0.000 1.024
T50 1.024 0.000 1.024
Peak 1.024 0.000 1.024
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
114.1122 -35.0005 0.0547 8.3 -161.3 0.0390 3.5 TRIG_00355288
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.728 -55.399 (delta_t = 5.329 [sec])
-54.728 -9.728 (delta_t = 45.000 [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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.45727 ( -0.848242 1.45961 )
Norm@50keV : 4.02013E-04 ( -0.00039361 0.000847974 )
------------------------------------------------------------
# Chi-Squared = 78.10 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 57 degrees of freedom
# Null hypothesis probability = 3.322073e-02
Photon flux (15-150 keV) in 1.024 sec: 0.118221 ( -0.118221 0.099675 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.0854e-08 ( -2.0854e-08 1.54814e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.86970 ( 2.7016 2.3192 )
Epeak [keV] : 788.602 ( )
Norm@50keV : 2.81699E-04 ( -0.000276515 0.0056077 )
------------------------------------------------------------
# Chi-Squared = 77.21 using 59 PHA bins.
# Reduced chi-squared = 1.379 for 56 degrees of freedom
# Null hypothesis probability = 3.164943e-02
Photon flux (15-150 keV) in 1.024 sec: 0.118195 ( -0.118195 0.098685 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11643e-08 ( -2.11643e-08 1.57601e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.33111 ( 0.0968814 0.0968814 )
beta : -9.37166 ( -1.47762 0.826936 )
Epeak [keV] : 409.602 ( -330.69 9325.32 )
Norm@50keV : 2.49483E-04 ( -0.000248698 43.0088 )
------------------------------------------------------------
# Chi-Squared = 76.97 using 59 PHA bins.
# Reduced chi-squared = 1.399 for 55 degrees of freedom
# Null hypothesis probability = 2.688092e-02
Photon flux (15-150 keV) in 1.024 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 1.024 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.45727 ( -0.848242 1.45961 )
Norm@50keV : 4.02013E-04 ( -0.00039361 0.000847974 )
------------------------------------------------------------
# Chi-Squared = 78.10 using 59 PHA bins.
# Reduced chi-squared = 1.370 for 57 degrees of freedom
# Null hypothesis probability = 3.322073e-02
Photon flux (15-150 keV) in 1.024 sec: 0.118221 ( -0.118221 0.099675 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.0854e-08 ( -2.0854e-08 1.54814e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.86970 ( 2.7016 2.3192 )
Epeak [keV] : 788.602 ( )
Norm@50keV : 2.81699E-04 ( -0.000276515 0.0056077 )
------------------------------------------------------------
# Chi-Squared = 77.21 using 59 PHA bins.
# Reduced chi-squared = 1.379 for 56 degrees of freedom
# Null hypothesis probability = 3.164943e-02
Photon flux (15-150 keV) in 1.024 sec: 0.118195 ( -0.118195 0.098685 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.11643e-08 ( -2.11643e-08 1.57601e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 1.024 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.33111 ( 0.0968814 0.0968814 )
beta : -9.37166 ( -1.47762 0.826936 )
Epeak [keV] : 409.602 ( -330.69 9325.3 )
Norm@50keV : 2.49483E-04 ( -0.000248698 43.0088 )
------------------------------------------------------------
# Chi-Squared = 76.97 using 59 PHA bins.
# Reduced chi-squared = 1.399 for 55 degrees of freedom
# Null hypothesis probability = 2.688092e-02
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Sun Jun 21 09:32:17 EDT 2009