batgrbproduct Analysis for Trigger=356284
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 Jul 3 03:41:33 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger356284/GCN5_download_cron
======================================================================
Trigger: 00356284 Segment: 000
BAT Trigger Time: 268242925.184 [s; MET]
Trigger Stop: 268242925.2 [s; MET]
UTC: 2009-07-02T15:55:20.307140 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 163.668006906365 Dec: -12.0186905067909 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.65
Image Trigger?: NO
Rate S/N Ratio: 6.85565460040104 [ if not an image trigger ]
Image S/N Ratio: 5.65
Flight Position: [ source = BAT ]
RA: 163.668006906365 Dec: -12.0186905067909 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 163.670714300948 Dec: -11.9630114685767 [deg; J2000]
{ 10h 54m 41.0s , -11d 57' 46.8" }
+/- 4.54222206298973 [arcmin] (estimated 90% radius based on SNR)
+/- 2.24678330402962 [arcmin] (formal 1-sigma fit error)
SNR: 3.50076998259385
Angular difference between Flight and Ground position is 3.344519 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 0.0160000026226044 +/-
Measured from: 0
to: 0.0160000026226044 [s; relative to TRIGTIME]
T50: 0.0160000026226044 +/-
Measured from: 0
to: 0.0160000026226044 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0160000026226044 second)
Measured from: -1.49011611938477e-08
to: 0.0159999877214432 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0160000026226044 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.002445 0.002461 -0.000132 -0.000822
0.000862 0.000788 0.000655 0.000592 [error]
Peak 0.002445 0.002461 -0.000132 -0.000822
0.000862 0.000788 0.000655 0.000592 [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 5.06e-10 3.10e-10 1.22e-10 6.41e-11 9.70e-10 1.00e-09 erg/cm2
Error 4.18e-10 2.70e-10 1.52e-10 1.60e-10 6.50e-10 6.98e-10 erg/cm2
Peak flux Power-law 1.06e+00 3.67e-01 7.21e-02 1.67e-02 1.51e+00 1.52e+00 ph/cm2/s
Error 8.81e-01 3.16e-01 8.78e-02 3.76e-02 1.22e+00 1.22e+00 ph/cm2/s
Fluence Cutoff-PL 5.17e-10 6.42e-10 2.55e-10 2.97e-12 5.55e-17 9.03e-10 erg/cm2
Error 2.88e-10 1.30e-10 1.05e-12 5.44e-10 7.03e-10 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.06e+00 3.67e-01 7.20e-02 1.66e-02 1.51e+00 1.52e+00 ph/cm2/s
Error 8.81e-01 3.16e-01 8.78e-02 3.75e-02 1.22e+00 1.22e+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 3.349 1.818 - - 4.21e-03 4.38e-03 47.120 57
CPL 1.000 0.000 50.0 0.0 1.49e-02 0.00e+00 51.260 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.349 1.818 - - 4.21e-03 4.38e-03 47.120 57
CPL 1.000 0.000 50.0 0.0 1.49e-02 0.00e+00 51.260 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
163.6707 -11.9630 0.0548 26.4 -162.7 0.0046 3.5 TRIG_00356284
------------------------------------------
Foreground time interval of the image:
0.000 0.016 (delta_t = 0.016 [sec])
Background time interval of the image:
-60.184 -5.184 (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 0.016 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.34909 ( -1.02292 2.61384 )
Norm@50keV : 4.21482E-03 ( -0.00421481 0.00453883 )
------------------------------------------------------------
# Chi-Squared = 47.12 using 59 PHA bins.
# Reduced chi-squared = 0.8267 for 57 degrees of freedom
# Null hypothesis probability = 8.215888e-01
Photon flux (15-150 keV) in 0.016 sec: 1.51074 ( -1.51074 0.920468 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.70469e-10 ( -6.49688e-10 6.51261e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.49330E-02 ( )
------------------------------------------------------------
# Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9154 for 56 degrees of freedom
# Null hypothesis probability = 6.544101e-01
Photon flux (15-150 keV) in 0.016 sec: 1.51019 ( -1.51019 0.92025 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02835e-10 ( -5.26011e-10 5.61122e-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 : 4.38550 ( -4.56252 -4.56252 )
beta : -9.99721 ( 1136.67 1146.66 )
Epeak [keV] : 17.8244 ( -10.1399 7.8259 )
Norm@50keV : 9788.75 ( -9700.34 7067.62 )
------------------------------------------------------------
# Chi-Squared = 45.70 using 59 PHA bins.
# Reduced chi-squared = 0.8310 for 55 degrees of freedom
# Null hypothesis probability = 8.098765e-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: 3.34909 ( -1.02292 2.61384 )
Norm@50keV : 4.21482E-03 ( -0.00421481 0.00453883 )
------------------------------------------------------------
# Chi-Squared = 47.12 using 59 PHA bins.
# Reduced chi-squared = 0.8267 for 57 degrees of freedom
# Null hypothesis probability = 8.215888e-01
Photon flux (15-150 keV) in 0.016 sec: 1.51074 ( -1.51074 0.920468 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.70469e-10 ( -6.49688e-10 6.51261e-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: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.49330E-02 ( )
------------------------------------------------------------
# Chi-Squared = 51.26 using 59 PHA bins.
# Reduced chi-squared = 0.9154 for 56 degrees of freedom
# Null hypothesis probability = 6.544101e-01
Photon flux (15-150 keV) in 0.016 sec: 1.51019 ( -1.51019 0.92025 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.02835e-10 ( -5.26011e-10 5.61122e-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 : 4.38550 ( -4.56252 -4.56252 )
beta : -9.99721 ( 1136.67 1146.66 )
Epeak [keV] : 17.8244 ( -10.14 7.82562 )
Norm@50keV : 9788.75 ( -9700.34 7067.62 )
------------------------------------------------------------
# Chi-Squared = 45.70 using 59 PHA bins.
# Reduced chi-squared = 0.8310 for 55 degrees of freedom
# Null hypothesis probability = 8.098765e-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:
Fri Jul 3 03:49:19 EDT 2009