batgrbproduct Analysis for Trigger=359129
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): Wed Aug 5 07:16:42 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger359129/GCN5_download_cron
======================================================================
Trigger: 00359129 Segment: 000
BAT Trigger Time: 271089702.784 [s; MET]
Trigger Stop: 271089710.976 [s; MET]
UTC: 2009-08-04T14:41:37.814920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 240.308105595465 Dec: 38.4433575381122 [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: 95.0420959364849 [ if not an image trigger ]
Image S/N Ratio: 5.61
Flight Position: [ source = BAT ]
RA: 240.308105595465 Dec: 38.4433575381122 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 240.203223689222 Dec: 38.4457477502499 [deg; J2000]
{ 16h 00m 48.8s , +38d 26' 44.7" }
+/- 5.98291018061236 [arcmin] (estimated 90% radius based on SNR)
+/- 4.96491673145028 [arcmin] (formal 1-sigma fit error)
SNR: 2.36180155555068
Angular difference between Flight and Ground position is 4.930761 arcmin
Partial Coding Fraction: 0.3203125 [ including projection effects ]
Duration
T90: 8.19200003147125 +/-
Measured from: 0
to: 8.19200003147125 [s; relative to TRIGTIME]
T50: 8.19200003147125 +/-
Measured from: 0
to: 8.19200003147125 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 8.19200003147125 second)
Measured from: 0
to: 8.19200003147125 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 8.19200003147125 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.119848 -0.018346 -0.008436 0.002510
0.037079 0.034341 0.031900 0.034625 [error]
Peak 0.119848 -0.018346 -0.008436 0.002510
0.037079 0.034341 0.031900 0.034625 [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 3.44e-08 1.38e-08 3.26e-09 9.31e-10 5.21e-08 5.26e-08 erg/cm2
Error 2.21e-08 1.53e-08 7.94e-09 7.17e-09 3.83e-08 4.00e-08 erg/cm2
Peak flux Power-law 1.43e-01 3.29e-02 3.88e-03 5.07e-04 1.80e-01 1.80e-01 ph/cm2/s
Error 9.17e-02 3.51e-02 9.00e-03 3.40e-03 1.17e-01 1.17e-01 ph/cm2/s
Fluence Cutoff-PL 3.44e-08 1.38e-08 3.26e-09 9.24e-10 5.21e-08 5.24e-08 erg/cm2
Error 2.21e-08 1.53e-08 7.93e-09 7.11e-09 3.84e-08 4.01e-08 erg/cm2
Peak flux Cutoff-PL 1.79e-01 3.76e-02 1.71e-04 8.12e-10 2.17e-01 2.16e-01 ph/cm2/s
Error 9.71e-02 3.48e-02 2.15e-03 6.77e-05 1.14e-01 1.14e-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 3.947 1.983 - - 3.09e-04 4.63e-04 60.210 57
CPL 1.000 0.000 50.0 0.0 1.45e-03 0.00e+00 65.910 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 3.947 1.983 - - 3.09e-04 4.63e-04 60.210 57
CPL 1.000 0.000 50.0 0.0 1.45e-03 0.00e+00 65.910 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 8.192 0.000 8.192
T90 8.192 0.000 8.192
T50 8.192 0.000 8.192
Peak 8.192 0.000 8.192
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
240.2032 +38.4457 0.0811 48.8 -6.7 0.1903 2.4 TRIG_00359129
------------------------------------------
Foreground time interval of the image:
0.000 8.192 (delta_t = 8.192 [sec])
Background time interval of the image:
-60.784 -30.784 (delta_t = 30.000 [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 8.192 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.94705 ( -1.33355 2.63211 )
Norm@50keV : 3.08698E-04 ( -0.000300623 0.000625763 )
------------------------------------------------------------
# Chi-Squared = 60.21 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.604242e-01
Photon flux (15-150 keV) in 8.192 sec: 0.180103 ( -0.116177 0.118063 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20661e-08 ( -3.47203e-08 4.1819e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.45211E-03 ( )
------------------------------------------------------------
# Chi-Squared = 65.91 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 56 degrees of freedom
# Null hypothesis probability = 1.713903e-01
Photon flux (15-150 keV) in 8.192 sec: 0.216605 ( -0.114121 0.114173 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20701e-08 ( -3.50166e-08 4.1816e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.22542 ( 6.57997 8.69515 )
beta : -4.07865 ( -2.49582 1.45035 )
Epeak [keV] : 429.311 ( -429.311 -429.311 )
Norm@50keV : 3.70608E-02 ( -0.0368313 0.088728 )
------------------------------------------------------------
# Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.935057e-01
Photon flux (15-150 keV) in 8.192 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 8.192 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 3.94705 ( -1.33355 2.63211 )
Norm@50keV : 3.08698E-04 ( -0.000300623 0.000625763 )
------------------------------------------------------------
# Chi-Squared = 60.21 using 59 PHA bins.
# Reduced chi-squared = 1.056 for 57 degrees of freedom
# Null hypothesis probability = 3.604242e-01
Photon flux (15-150 keV) in 8.192 sec: 0.180103 ( -0.116177 0.118063 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20661e-08 ( -3.47203e-08 4.1819e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 1.45211E-03 ( )
------------------------------------------------------------
# Chi-Squared = 65.91 using 59 PHA bins.
# Reduced chi-squared = 1.177 for 56 degrees of freedom
# Null hypothesis probability = 1.713903e-01
Photon flux (15-150 keV) in 8.192 sec: 0.216605 ( -0.114121 0.114173 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.20701e-08 ( -3.50166e-08 4.1816e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 8.192 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.22542 ( 6.57997 8.69515 )
beta : -4.07865 ( -2.49582 1.45035 )
Epeak [keV] : 429.311 ( -429.311 -429.311 )
Norm@50keV : 3.70608E-02 ( -0.0368313 0.088728 )
------------------------------------------------------------
# Chi-Squared = 60.19 using 59 PHA bins.
# Reduced chi-squared = 1.094 for 55 degrees of freedom
# Null hypothesis probability = 2.935057e-01
Photon flux (15-150 keV) in 8.192 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Aug 5 07:37:26 EDT 2009