batgrbproduct Analysis for Trigger=334129
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): Tue Nov 24 10:36:12 EST 2009
Host Name: gcn14
Current Working Dir: /net/raid16/BAT_GRB_process_2009/334129
======================================================================
Trigger: 00334129 Segment: 000
BAT Trigger Time: 247931240 [s; MET]
Trigger Stop: 247931368 [s; MET]
UTC: 2008-11-09T13:47:16.758200 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 350.157415273707 Dec: -55.9037523400265 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.09
Flight Position: [ source = BAT ]
RA: 350.157415273707 Dec: -55.9037523400265 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 350.120532030109 Dec: -55.9144635630077 [deg; J2000]
{ 23h 20m 28.9s , -55d 54' 52.1" }
+/- 3.40274609462299 [arcmin] (estimated 90% radius based on SNR)
+/- 1.8472440103157 [arcmin] (formal 1-sigma fit error)
SNR: 5.28885777356863
Angular difference between Flight and Ground position is 1.397004 arcmin
Partial Coding Fraction: 0.96875 [ including projection effects ]
Duration
T90: 128 +/-
Measured from: 0
to: 128 [s; relative to TRIGTIME]
T50: 128 +/-
Measured from: 0
to: 128 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 128 second)
Measured from: 0
to: 128 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 128 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.266710 0.214194 0.032935 -0.010061
0.052495 0.055770 0.052233 0.053616 [error]
Peak 0.266710 0.214194 0.032935 -0.010061
0.052495 0.055770 0.052233 0.053616 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary (tot_pha/preslew_drm) ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 5.98e-08 7.74e-08 7.32e-08 1.23e-07 2.51e-07 3.34e-07 erg/cm2
Error 2.00e-08 2.40e-08 3.98e-08 1.47e-07 9.57e-08 1.83e-07 erg/cm2
Peak flux Power-law 1.52e-02 1.09e-02 5.17e-03 3.44e-03 3.30e-02 3.48e-02 ph/cm2/s
Error 5.20e-03 3.30e-03 2.72e-03 3.91e-03 9.51e-03 1.05e-02 ph/cm2/s
Fluence Cutoff-PL 5.57e-08 1.03e-07 4.63e-08 2.61e-09 2.08e-07 2.08e-07 erg/cm2
Error 2.30e-08 3.53e-08 4.61e-08 4.34e-08 7.96e-08 9.10e-08 erg/cm2
Peak flux Cutoff-PL 1.38e-02 1.46e-02 3.58e-03 1.12e-04 3.21e-02 3.21e-02 ph/cm2/s
Error 5.93e-03 4.89e-03 3.70e-03 1.37e-03 8.97e-03 9.00e-03 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 2.079 0.527 - - 2.12e-04 8.69e-05 71.013 57
CPL 0.126 2.483 34.6 27.3 3.75e-03 0.00e+00 67.752 0
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.079 0.527 - - 2.12e-04 8.69e-05 71.013 57
CPL 0.126 2.483 34.6 27.3 3.75e-03 0.00e+00 67.752 0
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 128.000 0.000 128.000
T90 128.000 0.000 128.000
T50 128.000 0.000 128.000
Peak 128.000 0.000 128.000
Image
Pre-slew 15-350 keV image (Event data; bgd subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
350.1205 -55.9145 0.0362 11.1 127.0 0.6291 5.3 TRIG_00334129
------------------------------------------
Foreground time interval of the image:
247931240.000000 247931368.000000
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)
Flight mask-tagged light curves
Quad-rate summed light curves (from T0-300 to T0+1000)
Spectral Evolution
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 128.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07891 ( -0.478973 0.575170 )
Norm@50keV : 2.118253E-04 ( -8.686543E-05 8.691834E-05) )
------------------------------------------------------------
Chi-Squared = 71.01315 using 59 PHA bins.
Reduced chi-squared = 1.245845 for 57 degrees of freedom
Null hypothesis probability = 0.100
Photon flux (15-150 keV) in 128.0 sec: 3.298436E-02 ( -0.00948037 0.00953455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51382e-07 ( -9.0272e-08 1.0105e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 128.000 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.125721 ( -3.12572 1.83945 )
Epeak [keV] : 34.5938 ( -34.5838 20.0788 )
Norm@50keV : 3.751669E-03 ( )
------------------------------------------------------------
Chi-Squared = 67.75243 using 59 PHA bins.
but latest trial 54.6568 gives Chi-Squared = 3.48188
Reduced chi-squared = 1.209865 for 56 degrees of freedom
Null hypothesis probability = 0.135
Photon flux (15-150 keV) in 128.0 sec: 3.208418E-02 ( -0.00886131 0.00908444 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07878e-07 ( -6.76493e-08 9.1488e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.520150 ( -2.16855 5.52015 )
beta : -9.36822 ( )
Epeak [keV] : 34.5023 ( )
Norm@50keV : 2.090893E-03 ( )
------------------------------------------------------------
Chi-Squared = 68.01054 using 59 PHA bins.
Reduced chi-squared = 1.236555 for 55 degrees of freedom
Null hypothesis probability = 0.112
Photon flux (15-150 keV) in 128.0 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07891 ( -0.478973 0.575170 )
Norm@50keV : 2.118253E-04 ( -8.686543E-05 8.691834E-05) )
------------------------------------------------------------
Chi-Squared = 71.01315 using 59 PHA bins.
Reduced chi-squared = 1.245845 for 57 degrees of freedom
Null hypothesis probability = 0.100
Photon flux (15-150 keV) in 128.0 sec: 3.298436E-02 ( -0.00948037 0.00953455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51382e-07 ( -9.0272e-08 1.0105e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 128.000 sec.
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.125721 ( -3.12572 1.83945 )
Epeak [keV] : 34.5938 ( -34.5838 20.0788 )
Norm@50keV : 3.751669E-03 ( )
------------------------------------------------------------
Chi-Squared = 67.75243 using 59 PHA bins.
but latest trial 54.6568 gives Chi-Squared = 3.48188
Reduced chi-squared = 1.209865 for 56 degrees of freedom
Null hypothesis probability = 0.135
Photon flux (15-150 keV) in 128.0 sec: 3.208418E-02 ( -0.00886131 0.00908444 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07878e-07 ( -6.76493e-08 9.1488e-08 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 128.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.520150 ( -2.16855 5.52015 )
beta : -9.36822 ( )
Epeak [keV] : 34.5023 ( )
Norm@50keV : 2.090893E-03 ( )
------------------------------------------------------------
Chi-Squared = 68.01054 using 59 PHA bins.
Reduced chi-squared = 1.236555 for 55 degrees of freedom
Null hypothesis probability = 0.112
Photon flux (15-150 keV) in 128.0 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.07891 ( -0.478973 0.575170 )
Norm@50keV : 2.118253E-04 ( -8.686543E-05 8.691834E-05) )
------------------------------------------------------------
Chi-Squared = 71.01315 using 59 PHA bins.
Reduced chi-squared = 1.245845 for 57 degrees of freedom
Null hypothesis probability = 0.100
Photon flux (15-150 keV) in 128.0 sec: 3.298436E-02 ( -0.00948037 0.00953455 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.51382e-07 ( -9.0272e-08 1.0105e-07 ) ergs/cm2
Cutoff power-law model
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.125721 ( -3.12572 1.83945 )
Epeak [keV] : 34.5938 ( -34.5838 20.0788 )
Norm@50keV : 3.751669E-03 ( )
------------------------------------------------------------
Chi-Squared = 67.75243 using 59 PHA bins.
but latest trial 54.6568 gives Chi-Squared = 3.48188
Reduced chi-squared = 1.209865 for 56 degrees of freedom
Null hypothesis probability = 0.135
Photon flux (15-150 keV) in 128.0 sec: 3.208418E-02 ( -0.00886131 0.00908444 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.07878e-07 ( -6.76493e-08 9.1488e-08 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.520150 ( -2.16855 5.52015 )
beta : -9.36822 ( )
Epeak [keV] : 34.5023 ( )
Norm@50keV : 2.090893E-03 ( )
------------------------------------------------------------
Chi-Squared = 68.01054 using 59 PHA bins.
Reduced chi-squared = 1.236555 for 55 degrees of freedom
Null hypothesis probability = 0.112
Photon flux (15-150 keV) in 128.0 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 7.73784e-08
S(50-100 keV) = 7.32353e-08
T90 vs. Hardness ratio plot
T90 = 128 sec.
Hardness ratio = 0.946457
Color vs. Color plot
Count ratio (25-50 keV) / (15-25 keV) = 0.803097
Count ratio (100-50 keV) / (15-25 keV) = 0.123486
DPI of the refined source position
IMX = -1.177658259364378E-01, IMY = -1.562584058776987E-01
TIME vs. PHA plot around the trigger time
TIME vs. DetID plot around the trigger time
100 us light curve (15-350 keV)
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image is from 0.000 sec. to 0.000 sec.
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image is from 0.000 sec. to 128.000 sec.
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
275.9250 -30.3670 0.0000 45.6 -58.1 0.1850 0.3 H1820-303
285.0360 -24.9205 0.0000 44.8 -44.4 0.0576 0.2 HT1900.1-2455
58.3259 -49.7246 0.0371 50.3 145.7 3.2911 5.2 UNKNOWN
85.5962 -69.3229 0.0468 47.3 176.9 1.0862 4.1 UNKNOWN
271.3545 -45.5319 0.0596 37.9 -78.6 1.0629 3.2 UNKNOWN
286.2179 -86.9221 0.0372 33.2 -153.3 0.7581 5.2 UNKNOWN
294.2070 -22.4376 0.0418 42.2 -32.2 0.9121 4.6 UNKNOWN
------------------------------------------
Post-slew image of 15-350 keV band
Time interval of the image is from 167.301 sec. to 609.001 sec.
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
106.6738 -62.8714 0.0618 51.5 -172.9 2.3154 3.1 UNKNOWN
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