batgrbproduct Analysis for Trigger=357694
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): Sat Jul 18 18:55:34 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger357694/GCN5_download_cron
======================================================================
Trigger: 00357694 Segment: 000
BAT Trigger Time: 269598661.536 [s; MET]
Trigger Stop: 269598661.6 [s; MET]
UTC: 2009-07-18T08:30:56.615200 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 300.11121293607 Dec: 46.5192950448795 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 5.93
Image Trigger?: NO
Rate S/N Ratio: 6.48074069840786 [ if not an image trigger ]
Image S/N Ratio: 5.93
Flight Position: [ source = BAT ]
RA: 300.11121293607 Dec: 46.5192950448795 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.160081855463 Dec: 46.5500653462113 [deg; J2000]
{ 20h 00m 38.4s , +46d 33' 00.2" }
+/- 4.29226013182024 [arcmin] (estimated 90% radius based on SNR)
+/- 2.37682090857126 [arcmin] (formal 1-sigma fit error)
SNR: 3.7956065543869
Angular difference between Flight and Ground position is 2.734420 arcmin
Partial Coding Fraction: 0.6171875 [ 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 0.004792 0.007094 0.002051 -0.000198
0.001946 0.002085 0.001554 0.001485 [error]
Peak 0.004792 0.007094 0.002051 -0.000198
0.001946 0.002085 0.001554 0.001485 [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 1.22e-09 1.70e-09 1.74e-09 3.27e-09 5.70e-09 7.92e-09 erg/cm2
Error 7.47e-10 8.09e-10 1.22e-09 5.20e-09 3.04e-09 6.33e-09 erg/cm2
Peak flux Power-law 6.21e-01 4.76e-01 2.45e-01 1.81e-01 1.43e+00 1.52e+00 ph/cm2/s
Error 3.86e-01 2.27e-01 1.67e-01 2.47e-01 6.80e-01 7.29e-01 ph/cm2/s
Fluence Cutoff-PL 1.29e-09 2.60e-09 6.34e-10 4.52e-09 0.00e+00 0.00e+00 erg/cm2
Error 7.77e-10 1.23e-09 1.33e-09 4.44e-09 0.00e+00 0.00e+00 erg/cm2
Peak flux Cutoff-PL 6.23e-01 7.42e-01 1.04e-01 4.84e-04 1.48e+00 1.47e+00 ph/cm2/s
Error 3.85e-01 3.39e-01 1.89e-01 1.22e-01 6.58e-01 6.59e-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 1.46e+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 1.960 0.809 - - 9.68e-03 5.37e-03 55.300 57
CPL -4.905 0.000 31.8 8.9 4.24e+02 3.10e+02 53.140 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.960 0.809 - - 9.68e-03 5.37e-03 55.300 57
CPL -4.905 0.000 31.8 8.9 4.24e+02 3.10e+02 53.140 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
300.1601 +46.5501 0.0506 33.6 14.6 0.0131 3.8 TRIG_00357694
------------------------------------------
Foreground time interval of the image:
0.000 0.064 (delta_t = 0.064 [sec])
Background time interval of the image:
-60.536 -5.536 (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 0.064 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95952 ( -0.774694 0.844305 )
Norm@50keV : 9.67722E-03 ( -0.00542653 0.00530564 )
------------------------------------------------------------
# Chi-Squared = 55.30 using 59 PHA bins.
# Reduced chi-squared = 0.9702 for 57 degrees of freedom
# Null hypothesis probability = 5.389575e-01
Photon flux (15-150 keV) in 0.064 sec: 1.42527 ( -0.679033 0.68064 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.69869e-09 ( -2.89368e-09 3.18233e-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: -4.90501 ( )
Epeak [keV] : 31.7509 ( -7.69847 10.1203 )
Norm@50keV : 424.443 ( -424.449 196.258 )
------------------------------------------------------------
# Chi-Squared = 53.14 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 56 degrees of freedom
# Null hypothesis probability = 5.836774e-01
Photon flux (15-150 keV) in 0.064 sec: 1.47568 ( -0.655899 0.65995 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 : 4.88966 ( -29.2875 -19.2894 )
beta : -3.28767 ( 3.30532 1.61301 )
Epeak [keV] : 29.7466 ( -25.0633 11.7947 )
Norm@50keV : 595.732 ( -598.425 306.54 )
------------------------------------------------------------
# Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9562 for 55 degrees of freedom
# Null hypothesis probability = 5.671937e-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: 1.95952 ( -0.774694 0.844305 )
Norm@50keV : 9.67722E-03 ( -0.00542653 0.00530564 )
------------------------------------------------------------
# Chi-Squared = 55.30 using 59 PHA bins.
# Reduced chi-squared = 0.9702 for 57 degrees of freedom
# Null hypothesis probability = 5.389575e-01
Photon flux (15-150 keV) in 0.064 sec: 1.42527 ( -0.679033 0.68064 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.69869e-09 ( -2.89368e-09 3.18233e-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: -4.90501 ( )
Epeak [keV] : 31.7509 ( -7.69847 10.1203 )
Norm@50keV : 424.443 ( -424.449 196.258 )
------------------------------------------------------------
# Chi-Squared = 53.14 using 59 PHA bins.
# Reduced chi-squared = 0.9490 for 56 degrees of freedom
# Null hypothesis probability = 5.836774e-01
Photon flux (15-150 keV) in 0.064 sec: 1.47568 ( -0.655899 0.65995 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) 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 : 4.88966 ( -29.2875 -19.2894 )
beta : -3.28767 ( 3.30532 1.61301 )
Epeak [keV] : 29.7466 ( -25.0633 11.7947 )
Norm@50keV : 595.732 ( -598.425 306.54 )
------------------------------------------------------------
# Chi-Squared = 52.59 using 59 PHA bins.
# Reduced chi-squared = 0.9562 for 55 degrees of freedom
# Null hypothesis probability = 5.671937e-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:
Sat Jul 18 19:21:37 EDT 2009