batgrbproduct Analysis for Trigger=501368
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 batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 10 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Thu Aug 25 22:12:31 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger501368/GCN5_download_cron
======================================================================
Trigger: 00501368 Segment: 000
BAT Trigger Time: 335926392 [s; MET]
Trigger Stop: 335926456 [s; MET]
UTC: 2011-08-25T00:53:04.705040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 130.191009216124 Dec: -45.0832010778387 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 7.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.28
Flight Position: [ source = BAT ]
RA: 130.191009216124 Dec: -45.0832010778387 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 130.189402223884 Dec: -45.1203278937999 [deg; J2000]
{ 08h 40m 45.5s , -45d 07' 13.2" }
+/- 2.7949466927907 [arcmin] (estimated 90% radius based on SNR)
+/- 1.70145075212228 [arcmin] (formal 1-sigma fit error)
SNR: 7.00554472098435
Angular difference between Flight and Ground position is 2.228648 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.340044 0.216553 0.105652 -0.043317
0.050213 0.051459 0.045909 0.041967 [error]
Peak 0.340044 0.216553 0.105652 -0.043317
0.050213 0.051459 0.045909 0.041967 [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 1.01e-07 9.79e-08 6.66e-08 7.11e-08 2.94e-07 3.36e-07 erg/cm2
Error 2.52e-08 2.69e-08 3.61e-08 8.47e-08 8.73e-08 1.31e-07 erg/cm2
Peak flux Power-law 5.18e-02 2.82e-02 9.58e-03 4.23e-03 9.18e-02 9.38e-02 ph/cm2/s
Error 1.32e-02 7.43e-03 5.03e-03 4.07e-03 2.03e-02 2.12e-02 ph/cm2/s
Fluence Cutoff-PL 1.04e-07 1.05e-07 1.94e-08 2.84e-10 2.35e-07 2.41e-07 erg/cm2
Error 2.88e-08 3.88e-08 4.96e-08 5.37e-08 1.03e-07 1.48e-07 erg/cm2
Peak flux Cutoff-PL 5.29e-02 3.10e-02 3.10e-03 2.39e-05 8.74e-02 8.78e-02 ph/cm2/s
Error 1.46e-02 1.05e-02 7.01e-03 4.26e-03 2.12e-02 1.66e-02 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 2.556 0.504 - - 4.52e-04 1.82e-04 69.710 57
CPL 1.279 0.000 16.5 0.0 3.62e-03 0.00e+00 69.070 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.556 0.504 - - 4.52e-04 1.82e-04 69.710 57
CPL 1.279 0.000 16.5 0.0 3.62e-03 0.00e+00 69.070 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
130.1894 -45.1203 0.0273 33.5 -36.8 0.7223 7.0 TRIG_00501368
------------------------------------------
Foreground time interval of the image:
0.000 64.000 (delta_t = 64.000 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) 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.
- 5) 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.
- 6) 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 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55596 ( -0.456406 0.551392 )
Norm@50keV : 4.51556E-04 ( -0.000179451 0.000185549 )
------------------------------------------------------------
# Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204165e-01
Photon flux (15-150 keV) in 64 sec: 9.18369E-02 ( -0.0203152 0.0203637 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93554e-07 ( -8.31405e-08 9.15501e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27946 ( )
Epeak [keV] : 16.5195 ( )
Norm@50keV : 3.61711E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.07 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 56 degrees of freedom
# Null hypothesis probability = 1.127793e-01
Photon flux (15-150 keV) in 64 sec: 8.74264E-02 ( -0.0200695 0.0224106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35e-07 ( -7.03802e-08 1.36497e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98393 ( -120.852 -120.852 )
beta : -3.01470 ( -1.09035 0.700415 )
Epeak [keV] : 20.2146 ( -20.2146 5.13144 )
Norm@50keV : 542.059 ( -542.053 298.158 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246202e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.90697 (-1.19198 1.48987)
R^2/D10^2 : 0.363813 (-0.225752 0.617036)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.20 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.055e-07 5.350e-08
25- 50 1.017e-07 5.165e-08
50-150 8.730e-09 6.556e-09
15-150 2.159e-07 1.001e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1457 (-10.268 21.7553)
Norm : 0.869226 (-0.357802 0.711642)
------------------------------------------------------------
# Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.315294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-07 3.488e-08
25- 50 1.052e-07 5.032e-08
50-150 4.512e-08 3.331e-08
15-150 2.526e-07 1.008e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27867 (-5.27481 1.5583)
R1^2/D10^2 : 0.540519 (-0.538648 1.37412)
kT2 [keV] : 24.4490 (-24.1547 -24.1547)
R2^2/D10^2 : 5.10079E-04 (-0.000543118 0.525221)
------------------------------------------------------------
# Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.307675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.074e-07 6.192e-08
25- 50 9.670e-08 5.670e-08
50-150 8.957e-08 7.811e-08
15-150 2.937e-07 1.525e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.55596 ( -0.456406 0.551392 )
Norm@50keV : 4.51556E-04 ( -0.000179451 0.000185549 )
------------------------------------------------------------
# Chi-Squared = 69.71 using 59 PHA bins.
# Reduced chi-squared = 1.223 for 57 degrees of freedom
# Null hypothesis probability = 1.204165e-01
Photon flux (15-150 keV) in 64 sec: 9.18369E-02 ( -0.0203152 0.0203637 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.93554e-07 ( -8.31405e-08 9.15501e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.27946 ( )
Epeak [keV] : 16.5195 ( )
Norm@50keV : 3.61711E-03 ( )
------------------------------------------------------------
# Chi-Squared = 69.07 using 59 PHA bins.
# Reduced chi-squared = 1.233 for 56 degrees of freedom
# Null hypothesis probability = 1.127793e-01
Photon flux (15-150 keV) in 64 sec: 8.74264E-02 ( -0.0200695 0.0224106 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35e-07 ( -7.03802e-08 1.36497e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.98393 ( -120.852 -120.852 )
beta : -3.01470 ( -1.09035 0.700415 )
Epeak [keV] : 20.2146 ( -20.2146 5.13144 )
Norm@50keV : 542.059 ( -542.053 301.962 )
------------------------------------------------------------
# Chi-Squared = 67.23 using 59 PHA bins.
# Reduced chi-squared = 1.222 for 55 degrees of freedom
# Null hypothesis probability = 1.246202e-01
Photon flux (15-150 keV) in 64 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.90697 (-1.19198 1.48987)
R^2/D10^2 : 0.363813 (-0.225752 0.617036)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 69.20 using 59 PHA bins.
# Reduced chi-squared = 1.214 for 57 degrees of freedom
# Null hypothesis probability = 1.290035e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.055e-07 5.210e-08
25- 50 1.017e-07 5.200e-08
50-150 8.730e-09 6.526e-09
15-150 2.159e-07 1.209e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.1457 (-10.268 21.7553)
Norm : 0.869226 (-0.357802 0.711642)
------------------------------------------------------------
# Chi-Squared = 69.05 using 59 PHA bins.
# Reduced chi-squared = 1.211 for 57 degrees of freedom
# Null hypothesis probability = 1.315294e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.023e-07 3.291e-08
25- 50 1.052e-07 4.465e-08
50-150 4.512e-08 3.467e-08
15-150 2.526e-07 9.914e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27867 (-5.27481 1.5583)
R1^2/D10^2 : 0.540519 (-0.538648 1.37412)
kT2 [keV] : 24.4490 (-24.1547 -24.1547)
R2^2/D10^2 : 5.10079E-04 (-0.000543118 0.525221)
------------------------------------------------------------
# Chi-Squared = 66.88 using 59 PHA bins.
# Reduced chi-squared = 1.216 for 55 degrees of freedom
# Null hypothesis probability = 1.307675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.074e-07 6.192e-08
25- 50 9.670e-08 5.187e-08
50-150 8.957e-08 6.768e-08
15-150 2.937e-07 1.615e-07
Plot creation:
Thu Aug 25 22:38:01 EDT 2011