batgrbproduct Analysis for Trigger=354387
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): Tue Jun 9 04:29:36 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger354387/GCN5_download_cron
======================================================================
Trigger: 00354387 Segment: 000
BAT Trigger Time: 266156941.84 [s; MET]
Trigger Stop: 266156941.904 [s; MET]
UTC: 2009-06-08T12:28:57.030360 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 197.302415310893 Dec: 55.8641674081595 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.08
Image Trigger?: NO
Rate S/N Ratio: 10.1488915650922 [ if not an image trigger ]
Image S/N Ratio: 6.08
Flight Position: [ source = BAT ]
RA: 197.302415310893 Dec: 55.8641674081595 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.419708184287 Dec: 55.882981762137 [deg; J2000]
{ 13h 09m 40.7s , +55d 52' 58.7" }
+/- 3.92762870970878 [arcmin] (estimated 90% radius based on SNR)
+/- 2.11887996449883 [arcmin] (formal 1-sigma fit error)
SNR: 4.30884258875679
Angular difference between Flight and Ground position is 4.106434 arcmin
Partial Coding Fraction: 0.7421875 [ including projection effects ]
Duration
T90: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
T50: 0.0640000104904175 +/-
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 0.0640000104904175 second)
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 0.0640000104904175 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.000320 0.000871 0.005065 0.007885
0.001417 0.001437 0.001574 0.001703 [error]
Peak 0.000320 0.000871 0.005065 0.007885
0.001417 0.001437 0.001574 0.001703 [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 9.01e-12 9.92e-11 9.93e-10 6.98e-08 4.25e-09 7.09e-08 erg/cm2
Error 6.28e-11 2.42e-10 9.57e-10 5.83e-08 3.33e-09 5.90e-08 erg/cm2
Peak flux Power-law 4.27e-03 2.46e-02 1.23e-01 2.68e+00 3.93e-01 2.83e+00 ph/cm2/s
Error 3.08e-02 6.36e-02 1.23e-01 1.92e+00 3.35e-01 1.88e+00 ph/cm2/s
Fluence Cutoff-PL 8.96e-12 1.00e-10 1.02e-09 7.22e-08 4.36e-09 7.33e-08 erg/cm2
Error 6.20e-11 2.41e-10 9.57e-10 6.60e-08 3.36e-09 6.66e-08 erg/cm2
Peak flux Cutoff-PL 4.25e-03 2.48e-02 1.26e-01 2.76e+00 4.03e-01 2.91e+00 ph/cm2/s
Error 3.04e-02 6.32e-02 1.23e-01 2.18e+00 3.10e-01 2.13e+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 -1.294 1.386 - - 1.46e-03 2.39e-03 69.790 57
CPL -4.991 0.000 213.0 334.7 3.91e-03 1.82e-02 69.400 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL -1.294 1.386 - - 1.46e-03 2.39e-03 69.790 57
CPL -4.991 0.000 213.0 334.7 3.91e-03 1.82e-02 69.400 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
197.4197 +55.8830 0.0447 32.1 0.2 0.0141 4.3 TRIG_00354387
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
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: -1.29363 ( -1.0833 1.68869 )
Norm@50keV : 1.46449E-03 ( -0.0014478 0.00333124 )
------------------------------------------------------------
# Chi-Squared = 69.79 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.190648e-01
Photon flux (15-150 keV) in 0.064 sec: 0.393065 ( -0.393065 0.277407 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24513e-09 ( -4.24513e-09 2.41263e-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: -4.99127 ( )
Epeak [keV] : 213.005 ( -212.641 456.781 )
Norm@50keV : 3.90890E-03 ( -0.0040089 0.032319 )
------------------------------------------------------------
# Chi-Squared = 69.40 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.076959e-01
Photon flux (15-150 keV) in 0.064 sec: 0.402872 ( -0.352461 0.267416 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3612e-09 ( -4.3612e-09 2.36744e-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 : 4.35514 ( 0.224461 0.224461 )
beta : -9.37167 ( -1.69569 1.07367 )
Epeak [keV] : 232.502 ( -142.053 743.473 )
Norm@50keV : 3.48264E-03 ( -0.00347272 0.216422 )
------------------------------------------------------------
# Chi-Squared = 69.44 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.104402e-02
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: -1.29363 ( -1.0833 1.68869 )
Norm@50keV : 1.46449E-03 ( -0.0014478 0.00333124 )
------------------------------------------------------------
# Chi-Squared = 69.79 using 59 PHA bins.
# Reduced chi-squared = 1.224 for 57 degrees of freedom
# Null hypothesis probability = 1.190648e-01
Photon flux (15-150 keV) in 0.064 sec: 0.393065 ( -0.393065 0.277407 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24513e-09 ( -4.24513e-09 2.41263e-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: -4.99127 ( )
Epeak [keV] : 213.005 ( -212.641 456.781 )
Norm@50keV : 3.90890E-03 ( -0.0040089 0.032319 )
------------------------------------------------------------
# Chi-Squared = 69.40 using 59 PHA bins.
# Reduced chi-squared = 1.239 for 56 degrees of freedom
# Null hypothesis probability = 1.076959e-01
Photon flux (15-150 keV) in 0.064 sec: 0.402872 ( -0.352461 0.267416 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.3612e-09 ( -4.3612e-09 2.36744e-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 : 4.35514 ( 0.224461 0.224461 )
beta : -9.37167 ( -1.69569 1.07367 )
Epeak [keV] : 232.502 ( -142.053 743.473 )
Norm@50keV : 3.48264E-03 ( -0.00347272 0.216422 )
------------------------------------------------------------
# Chi-Squared = 69.44 using 59 PHA bins.
# Reduced chi-squared = 1.263 for 55 degrees of freedom
# Null hypothesis probability = 9.104402e-02
Photon flux (15-150 keV) in 0.064 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Tue Jun 9 04:50:19 EDT 2009