batgrbproduct Analysis for Trigger=355148
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 Jun 19 08:49:16 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger355148/GCN5_download_cron
======================================================================
Trigger: 00355148 Segment: 000
BAT Trigger Time: 267044801.712 [s; MET]
Trigger Stop: 267044801.776 [s; MET]
UTC: 2009-06-18T19:06:36.873960 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 162.701549798814 Dec: -72.8654286174599 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.72
Image Trigger?: NO
Rate S/N Ratio: 8.42614977317636 [ if not an image trigger ]
Image S/N Ratio: 5.72
Flight Position: [ source = BAT ]
RA: 162.701549798814 Dec: -72.8654286174599 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 163.000782861793 Dec: -72.8519943812409 [deg; J2000]
{ 10h 52m 00.2s , -72d 51' 07.2" }
+/- 4.18906555541684 [arcmin] (estimated 90% radius based on SNR)
+/- 3.74454918861535 [arcmin] (formal 1-sigma fit error)
SNR: 3.92988267246324
Angular difference between Flight and Ground position is 5.352594 arcmin
Partial Coding Fraction: 0.8828125 [ including projection effects ]
Duration
T90: 0.0639999806880951 +/-
Measured from: 0
to: 0.0639999806880951 [s; relative to TRIGTIME]
T50: 0.0639999806880951 +/-
Measured from: 0
to: 0.0639999806880951 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0639999806880951 second)
Measured from: 1.49011611938477e-08
to: 0.0639999955892563 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0639999806880951 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000551 0.001121 0.004100 0.006479
0.001330 0.001494 0.001413 0.001650 [error]
Peak 0.000551 0.001121 0.004100 0.006479
0.001330 0.001494 0.001413 0.001650 [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 4.82e-11 3.35e-10 2.05e-09 6.22e-08 7.05e-09 6.47e-08 erg/cm2
Error 1.53e-10 5.02e-10 1.64e-09 8.82e-08 5.12e-09 8.90e-08 erg/cm2
Peak flux Power-law 2.32e-02 8.51e-02 2.60e-01 2.53e+00 7.26e-01 2.90e+00 ph/cm2/s
Error 7.56e-02 1.33e-01 2.13e-01 3.28e+00 5.76e-01 2.84e+00 ph/cm2/s
Fluence Cutoff-PL 1.62e-11 2.16e-10 2.17e-09 2.31e-08 7.20e-09 3.11e-08 erg/cm2
Error 1.49e-10 4.94e-10 1.84e-09 9.79e-08 3.25e-09 9.88e-08 erg/cm2
Peak flux Cutoff-PL 2.32e-02 8.52e-02 2.61e-01 2.52e+00 7.27e-01 2.89e+00 ph/cm2/s
Error 7.53e-02 1.33e-01 2.13e-01 3.62e+00 5.76e-01 3.17e+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 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 -0.613 0.337 - - 4.08e-03 4.62e-03 54.080 57
CPL -4.353 0.000 165.1 0.0 1.75e-02 0.00e+00 53.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -0.613 0.337 - - 4.08e-03 4.62e-03 54.080 57
CPL -4.353 0.000 165.1 0.0 1.75e-02 0.00e+00 53.970 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
163.0008 -72.8520 0.0490 15.8 56.5 0.0115 3.9 TRIG_00355148
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.712 -1.712 (delta_t = 59.000 [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: -0.613254 ( 0.613254 1.28691 )
Norm@50keV : 4.08042E-03 ( -0.00408042 0.0051623 )
------------------------------------------------------------
# Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9487 for 57 degrees of freedom
# Null hypothesis probability = 5.853803e-01
Photon flux (15-150 keV) in 0.064 sec: 0.726069 ( -0.726069 0.425645 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04832e-09 ( -7.04832e-09 3.19663e-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: -4.35288 ( )
Epeak [keV] : 165.119 ( -1001.07 -1001.07 )
Norm@50keV : 1.74853E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.97 using 59 PHA bins.
# Reduced chi-squared = 0.9638 for 56 degrees of freedom
# Null hypothesis probability = 5.519354e-01
Photon flux (15-150 keV) in 0.064 sec: 0.727183 ( -0.727183 0.424067 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.20122e-09 ( -3.25258e-09 3.2487e-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 : -0.197543 ( 0.197541 0.197541 )
beta : 0.613236 ( -1.28693 -0.613234 )
Epeak [keV] : 16.1117 ( -16.1117 -16.1117 )
Norm@50keV : 7.06911E-03 ( -0.00706912 130103 )
------------------------------------------------------------
# Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9832 for 55 degrees of freedom
# Null hypothesis probability = 5.098307e-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: -0.613254 ( 0.613254 1.28691 )
Norm@50keV : 4.08042E-03 ( -0.00408042 0.0051623 )
------------------------------------------------------------
# Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9487 for 57 degrees of freedom
# Null hypothesis probability = 5.853803e-01
Photon flux (15-150 keV) in 0.064 sec: 0.726069 ( -0.726069 0.425645 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.04832e-09 ( -7.04832e-09 3.19663e-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: -4.35288 ( )
Epeak [keV] : 165.119 ( -1001.07 -1001.07 )
Norm@50keV : 1.74853E-02 ( )
------------------------------------------------------------
# Chi-Squared = 53.97 using 59 PHA bins.
# Reduced chi-squared = 0.9638 for 56 degrees of freedom
# Null hypothesis probability = 5.519354e-01
Photon flux (15-150 keV) in 0.064 sec: 0.727183 ( -0.727183 0.424067 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.20122e-09 ( -3.25258e-09 3.2487e-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 : -0.197543 ( 0.197541 0.197541 )
beta : 0.613236 ( -1.28693 -0.613234 )
Epeak [keV] : 16.1117 ( -16.1117 -16.1117 )
Norm@50keV : 7.06911E-03 ( -0.00706912 130103 )
------------------------------------------------------------
# Chi-Squared = 54.08 using 59 PHA bins.
# Reduced chi-squared = 0.9832 for 55 degrees of freedom
# Null hypothesis probability = 5.098307e-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 Jun 19 08:58:05 EDT 2009