batgrbproduct Analysis for Trigger=359711
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 12 18:23:14 EDT 2009
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger359711/GCN5_download_cron
======================================================================
Trigger: 00359711 Segment: 000
BAT Trigger Time: 271749733.888 [s; MET]
Trigger Stop: 271749734.912 [s; MET]
UTC: 2009-08-12T06:02:08.897520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 353.194081792447 Dec: -10.5945573605417 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.25
Image Trigger?: NO
Rate S/N Ratio: 23.388031127053 [ if not an image trigger ]
Image S/N Ratio: 10.25
Flight Position: [ source = BAT ]
RA: 353.194081792447 Dec: -10.5945573605417 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 353.199543594399 Dec: -10.6094791002756 [deg; J2000]
{ 23h 32m 47.9s , -10d 36' 34.1" }
+/- 0.753518514961302 [arcmin] (estimated 90% radius based on SNR)
+/- 0.218289165516442 [arcmin] (formal 1-sigma fit error)
SNR: 45.5720413610556
Angular difference between Flight and Ground position is 0.951487 arcmin
Partial Coding Fraction: 0.78125 [ including projection effects ]
Duration
T90: 66.6799999475479 +/- 14.6583733159175
Measured from: -1.74799990653992
to: 64.932000041008 [s; relative to TRIGTIME]
T50: 24.3079999685287 +/- 1.33022708248363
Measured from: 7.68800008296967
to: 31.9960000514984 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 26.8240000009537
to: 27.8240000009537 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.43999999761581
to: 113.916000008583 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.838322 2.945841 2.628506 0.903040
0.062623 0.064596 0.059082 0.051426 [error]
Peak 0.081131 0.136055 0.174081 0.075575
0.007084 0.008253 0.008537 0.007088 [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 5.75e-07 1.24e-06 2.11e-06 8.23e-06 5.79e-06 1.22e-05 erg/cm2
Error 3.27e-08 4.03e-08 6.20e-08 5.88e-07 1.57e-07 6.11e-07 erg/cm2
Peak flux Power-law 7.11e-01 1.03e+00 1.12e+00 2.27e+00 3.57e+00 5.14e+00 ph/cm2/s
Error 8.83e-02 7.65e-02 6.77e-02 3.11e-01 2.05e-01 3.39e-01 ph/cm2/s
Fluence Cutoff-PL 5.75e-07 1.24e-06 2.11e-06 8.17e-06 5.79e-06 1.21e-05 erg/cm2
Error 3.27e-08 4.04e-08 6.21e-08 5.84e-07 1.57e-07 6.07e-07 erg/cm2
Peak flux Cutoff-PL 7.10e-01 1.04e+00 1.12e+00 2.26e+00 3.57e+00 5.12e+00 ph/cm2/s
Error 8.82e-02 7.66e-02 6.78e-02 3.09e-01 2.05e-01 3.37e-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 1.236 0.050 - - 4.83e-03 1.25e-04 51.360 57
CPL 1.232 0.000 10000.0 0.0 4.85e-03 1.25e-04 51.450 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.884 0.104 - - 3.11e-02 1.78e-03 43.350 57
CPL 0.882 0.104 9999.4 0.0 3.13e-02 6.34e-03 43.370 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: 55.616000 sec.
T50 in the 50-300 keV band: 20.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 119.356 -5.440 113.916
T90 66.680 -1.748 64.932
T50 24.308 7.688 31.996
Peak 1.000 26.824 27.824
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
353.1995 -10.6095 0.0042 26.5 -36.7 2.6450 45.6 TRIG_00359711
------------------------------------------
Foreground time interval of the image:
-5.440 11.313 (delta_t = 16.753 [sec])
Background time interval of the image:
-239.888 -5.440 (delta_t = 234.448 [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 -5.440 sec. to 113.916 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23616 ( -0.0501977 0.0499616 )
Norm@50keV : 4.82856E-03 ( -0.000124955 0.000124819 )
------------------------------------------------------------
# Chi-Squared = 51.36 using 59 PHA bins.
# Reduced chi-squared = 0.9011 for 57 degrees of freedom
# Null hypothesis probability = 6.856434e-01
Photon flux (15-150 keV) in 119.4 sec: 0.569827 ( -0.0160636 0.0161289 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79115e-06 ( -1.56921e-07 1.57238e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.440 sec. to 113.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.23178 ( )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 4.85034E-03 ( -0.000125286 0.000125168 )
------------------------------------------------------------
# Chi-Squared = 51.45 using 59 PHA bins.
# Reduced chi-squared = 0.9188 for 56 degrees of freedom
# Null hypothesis probability = 6.475302e-01
Photon flux (15-150 keV) in 119.4 sec: 0.569539 ( -0.016055 0.01612 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.79214e-06 ( -1.5688e-07 1.5731e-07 ) ergs/cm2
Band function
Time interval is from -5.440 sec. to 113.916 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.137866 ( -2.814 -2.814 )
beta : -1.25065 ( -0.0525479 0.0542035 )
Epeak [keV] : 44.9180 ( -44.8662 185.677 )
Norm@50keV : 2.95021E-02 ( -0.02954 218.009 )
------------------------------------------------------------
# Chi-Squared = 50.45 using 59 PHA bins.
# Reduced chi-squared = 0.9172 for 55 degrees of freedom
# Null hypothesis probability = 6.490622e-01
Photon flux (15-150 keV) in 119.4 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 26.824 sec. to 27.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.884071 ( -0.104391 0.102685 )
Norm@50keV : 3.10743E-02 ( -0.00178452 0.00177832 )
------------------------------------------------------------
# Chi-Squared = 43.35 using 59 PHA bins.
# Reduced chi-squared = 0.7605 for 57 degrees of freedom
# Null hypothesis probability = 9.089454e-01
Photon flux (15-150 keV) in 1 sec: 3.56635 ( -0.204439 0.204709 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.50917e-07 ( -2.17825e-08 2.18798e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 26.824 sec. to 27.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.881803 ( -0.108258 0.100647 )
Epeak [keV] : 9999.36 ( -10000 -10000 )
Norm@50keV : 3.12705E-02 ( -0.00175625 0.0109319 )
------------------------------------------------------------
# Chi-Squared = 43.37 using 59 PHA bins.
# Reduced chi-squared = 0.7745 for 56 degrees of freedom
# Null hypothesis probability = 8.911175e-01
Photon flux (15-150 keV) in 1 sec: 3.56530 ( -0.20438 0.20464 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.51028e-07 ( -2.1794e-08 2.1895e-08 ) ergs/cm2
Band function
Time interval is from 26.824 sec. to 27.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.821202 ( 0.821202 0.821202 )
beta : -0.884088 ( -0.102591 0.104613 )
Epeak [keV] : 16.4794 ( -16.4794 -16.4794 )
Norm@50keV : 4.41569E-02 ( -0.0148331 0 )
------------------------------------------------------------
# Chi-Squared = 43.35 using 59 PHA bins.
# Reduced chi-squared = 0.7881 for 55 degrees of freedom
# Null hypothesis probability = 8.720752e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Plot creation:
Wed Aug 12 18:42:29 EDT 2009