batgrbproduct Analysis for Trigger=354155
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 v2.44
Process Start Time (local time): Fri Jun 5 19:38:33 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354155/GCN5_download_cron
======================================================================
Trigger: 00354155 Segment: 000
BAT Trigger Time: 265906501.76 [s; MET]
Trigger Stop: 265906502.784 [s; MET]
UTC: 2009-06-05T14:54:56.958380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 214.814042137029 Dec: 58.9652159223852 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.61
Image Trigger?: NO
Rate S/N Ratio: 20.0748598998847 [ if not an image trigger ]
Image S/N Ratio: 5.61
Flight Position: [ source = BAT ]
RA: 214.814042137029 Dec: 58.9652159223852 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 214.823032735001 Dec: 58.9529746142146 [deg; J2000]
{ 14h 19m 17.5s , +58d 57' 10.7" }
+/- 5.11620636476171 [arcmin] (estimated 90% radius based on SNR)
+/- 3.25176277738655 [arcmin] (formal 1-sigma fit error)
SNR: 2.95348960185169
Angular difference between Flight and Ground position is 0.785386 arcmin
Partial Coding Fraction: 0.5390625 [ 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 0.000702 0.018572 0.017485 0.006668
0.007096 0.007162 0.006312 0.005698 [error]
Peak 0.000702 0.018572 0.017485 0.006668
0.007096 0.007162 0.006312 0.005698 [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 2.59e-09 5.86e-09 1.05e-08 4.42e-08 2.85e-08 6.31e-08 erg/cm2
Error 2.70e-09 3.51e-09 5.66e-09 6.16e-08 1.47e-08 5.91e-08 erg/cm2
Peak flux Power-law 8.09e-02 9.96e-02 8.91e-02 1.38e-01 3.17e-01 4.07e-01 ph/cm2/s
Error 7.61e-02 6.12e-02 4.72e-02 1.74e-01 1.68e-01 2.08e-01 ph/cm2/s
Fluence Cutoff-PL 1.67e-09 6.70e-09 1.23e-08 1.33e-08 2.86e-08 2.84e-08 erg/cm2
Error 2.43e-09 5.78e-09 9.84e-09 5.81e-08 1.53e-08 5.47e-08 erg/cm2
Peak flux Cutoff-PL 5.09e-02 1.11e-01 1.07e-01 3.59e-02 2.97e-01 3.04e-01 ph/cm2/s
Error 7.66e-02 7.90e-02 6.28e-02 1.48e-01 1.65e-01 2.12e-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 7.12e-02 1.13e-01 3.79e-01 3.56e-01 0.00e+00 0.00e+00 ph/cm2/s
Error 8.62e-02 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 1.160 0.879 - - 2.72e-03 1.39e-03 54.800 57
CPL -0.767 0.000 78.5 0.0 2.10e-02 0.00e+00 53.930 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.160 0.879 - - 2.72e-03 1.39e-03 54.800 57
CPL -0.767 0.000 78.5 0.0 2.10e-02 0.00e+00 53.930 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
214.8230 +58.9530 0.0658 40.6 -7.9 0.0399 3.0 TRIG_00354155
------------------------------------------
Foreground time interval of the image:
0.000 1.024 (delta_t = 1.024 [sec])
Background time interval of the image:
-60.760 -5.760 (delta_t = 55.000 [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: 1.16020 ( -0.941989 0.816838 )
Norm@50keV : 2.71529E-03 ( -0.00140297 0.00137485 )
------------------------------------------------------------
# Chi-Squared = 54.80 using 59 PHA bins.
# Reduced chi-squared = 0.9614 for 57 degrees of freedom
# Null hypothesis probability = 5.580979e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317266 ( -0.16547 0.171162 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85396e-08 ( -1.45599e-08 1.48994e-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: -0.766986 ( 0.765875 0.765875 )
Epeak [keV] : 78.4779 ( )
Norm@50keV : 2.09697E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.93 using 59 PHA bins.
# Reduced chi-squared = 0.9630 for 56 degrees of freedom
# Null hypothesis probability = 5.536433e-01
Photon flux (15-150 keV) in 1.024 sec: 0.296560 ( -0.156489 0.174129 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85635e-08 ( -1.50481e-08 1.56158e-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 : 4.33034 ( -2.90489 -0.680276 )
beta : -1.72049 ( 9.98274 9.98274 )
Epeak [keV] : 44.2799 ( -40.2733 181.728 )
Norm@50keV : 4.06633 ( -4.18633 3.3991 )
------------------------------------------------------------
# Chi-Squared = 53.81 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 55 degrees of freedom
# Null hypothesis probability = 5.203126e-01
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: 1.16020 ( -0.941989 0.816838 )
Norm@50keV : 2.71529E-03 ( -0.00140297 0.00137485 )
------------------------------------------------------------
# Chi-Squared = 54.80 using 59 PHA bins.
# Reduced chi-squared = 0.9614 for 57 degrees of freedom
# Null hypothesis probability = 5.580979e-01
Photon flux (15-150 keV) in 1.024 sec: 0.317266 ( -0.16547 0.171162 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85396e-08 ( -1.45599e-08 1.48994e-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: -0.766986 ( 0.765875 0.765875 )
Epeak [keV] : 78.4779 ( )
Norm@50keV : 2.09697E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.93 using 59 PHA bins.
# Reduced chi-squared = 0.9630 for 56 degrees of freedom
# Null hypothesis probability = 5.536433e-01
Photon flux (15-150 keV) in 1.024 sec: 0.296560 ( -0.156489 0.174129 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.85635e-08 ( -1.50481e-08 1.56158e-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 : 4.33034 ( -2.90489 -0.680276 )
beta : -1.72049 ( 9.98274 9.98274 )
Epeak [keV] : 44.2799 ( -40.2733 181.728 )
Norm@50keV : 4.06633 ( -4.18633 3.3991 )
------------------------------------------------------------
# Chi-Squared = 53.81 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 55 degrees of freedom
# Null hypothesis probability = 5.203126e-01
Photon flux (15-150 keV) in 1.024 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Fri Jun 5 19:47:15 EDT 2009