batgrbproduct Analysis for Trigger=319964
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 Jul 28 14:00:55 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger319964/SDC
======================================================================
Trigger: 00319964 Segment: 000
BAT Trigger Time: 240365576 [s; MET]
Trigger Stop: 240365640 [s; MET]
UTC: 2008-08-14T00:12:52.983240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 264.80772354708 Dec: -30.3430541276879 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.14
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.14
Flight Position: [ source = BAT ]
RA: 264.80772354708 Dec: -30.3430541276879 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 264.827439361736 Dec: -30.3198507446065 [deg; J2000]
{ 17h 39m 18.6s , -30d 19' 11.5" }
+/- 2.17014065621027 [arcmin] (estimated 90% radius based on SNR)
+/- 0.83071460338254 [arcmin] (formal 1-sigma fit error)
SNR: 10.0559106046914
Angular difference between Flight and Ground position is 1.726477 arcmin
Partial Coding Fraction: 1.015625 [ 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 0.423637 0.375372 0.071933 -0.012419
0.049717 0.043759 0.035914 0.030336 [error]
Peak 0.423637 0.375372 0.071933 -0.012419
0.049717 0.043759 0.035914 0.030336 [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 1.36e-07 1.26e-07 8.17e-08 8.14e-08 3.77e-07 4.25e-07 erg/cm2
Error 2.26e-08 2.09e-08 2.68e-08 4.92e-08 6.53e-08 9.23e-08 erg/cm2
Peak flux Power-law 7.01e-02 3.65e-02 1.18e-02 4.89e-03 1.21e-01 1.23e-01 ph/cm2/s
Error 1.19e-02 5.80e-03 3.74e-03 2.77e-03 1.68e-02 1.72e-02 ph/cm2/s
Fluence Cutoff-PL 1.26e-07 1.54e-07 3.93e-08 1.03e-09 3.20e-07 3.20e-07 erg/cm2
Error 2.55e-08 2.89e-08 3.36e-08 1.03e-08 5.86e-08 5.94e-08 erg/cm2
Peak flux Cutoff-PL 6.34e-02 4.47e-02 6.27e-03 8.99e-05 1.14e-01 1.14e-01 ph/cm2/s
Error 1.36e-02 8.26e-03 4.87e-03 7.79e-04 1.70e-02 1.70e-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 1.13e-01 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 2.631 0.307 - - 5.68e-04 1.38e-04 63.220 57
CPL 0.211 2.571 24.1 0.0 2.27e-02 0.00e+00 56.840 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.631 0.307 - - 5.68e-04 1.38e-04 63.220 57
CPL 0.211 2.571 24.1 0.0 2.27e-02 0.00e+00 56.840 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
264.8274 -30.3199 0.0191 0.0 -42.1 0.9000 10.1 TRIG_00319964
------------------------------------------
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: 2.63050 ( -0.288921 0.32586 )
Norm@50keV : 5.67553E-04 ( -0.000137244 0.000138961 )
------------------------------------------------------------
# Chi-Squared = 63.22 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.662195e-01
Photon flux (15-150 keV) in 64 sec: 0.121037 ( -0.0168385 0.0168407 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77495e-07 ( -6.38428e-08 6.68333e-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: 0.211041 ( -3.43723 1.70382 )
Epeak [keV] : 24.0976 ( )
Norm@50keV : 2.26800E-02 ( )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.436372e-01
Photon flux (15-150 keV) in 64 sec: 0.114449 ( -0.0169686 0.017078 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19876e-07 ( -5.34118e-08 6.38445e-08 ) 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 : 0.171061 ( -2.02181 1.56744 )
beta : -9.99992 ( 42223.8 42233.8 )
Epeak [keV] : 25.0358 ( -19.6663 5.12416 )
Norm@50keV : 4.10683E-02 ( -0.0424995 5.00017 )
------------------------------------------------------------
# Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.088654e-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] : 6.90069 (-0.864548 0.975673)
R^2/D10^2 : 0.247554 (-0.106787 0.19134)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.562644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.194e-07 3.011e-08
25- 50 1.590e-07 3.661e-08
50-150 2.502e-08 1.208e-08
15-150 3.034e-07 5.853e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7881 (-6.83236 10.0221)
Norm : 1.08539 (-0.285674 0.41248)
------------------------------------------------------------
# Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.336675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.328e-07 2.298e-08
25- 50 1.421e-07 2.640e-08
50-150 6.673e-08 3.272e-08
15-150 3.416e-07 7.046e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.282979 ( )
R1^2/D10^2 : 9.45317E+17 (-4.29639e+17 -8.9915e+17)
kT2 [keV] : 7.14059 (-0.900406 1.02683)
R2^2/D10^2 : 0.209545 (-0.0915477 0.163376)
------------------------------------------------------------
# Chi-Squared = 54.12 using 59 PHA bins.
# Chi-Squared = 53.77 using 59 PHA bins.
# Reduced chi-squared = 0.9841 for 55 degrees of freedom
# Reduced chi-squared = 0.9776 for 55 degrees of freedom
# Null hypothesis probability = 5.080485e-01
# Null hypothesis probability = 5.217208e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.180e-07 3.454e-08
25- 50 1.590e-07 5.222e-08
50-150 3.037e-08 1.679e-08
15-150 3.073e-07 8.803e-08
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: 2.63050 ( -0.288921 0.32586 )
Norm@50keV : 5.67553E-04 ( -0.000137244 0.000138961 )
------------------------------------------------------------
# Chi-Squared = 63.22 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.662195e-01
Photon flux (15-150 keV) in 64 sec: 0.121037 ( -0.0168385 0.0168407 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.77495e-07 ( -6.38428e-08 6.68333e-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: 0.211041 ( -3.43723 1.70382 )
Epeak [keV] : 24.0976 ( )
Norm@50keV : 2.26800E-02 ( )
------------------------------------------------------------
# Chi-Squared = 56.84 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 56 degrees of freedom
# Null hypothesis probability = 4.436372e-01
Photon flux (15-150 keV) in 64 sec: 0.114449 ( -0.0169686 0.017078 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.19876e-07 ( -5.34118e-08 6.38445e-08 ) 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 : 0.171061 ( -2.02181 1.56744 )
beta : -9.99992 ( 42223.8 42233.8 )
Epeak [keV] : 25.0358 ( -19.6663 5.12416 )
Norm@50keV : 4.10683E-02 ( -0.0424995 5.00017 )
------------------------------------------------------------
# Chi-Squared = 56.77 using 59 PHA bins.
# Reduced chi-squared = 1.032 for 55 degrees of freedom
# Null hypothesis probability = 4.088654e-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] : 6.90069 (-0.864548 0.975673)
R^2/D10^2 : 0.247554 (-0.106787 0.19134)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 57.51 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 57 degrees of freedom
# Null hypothesis probability = 4.562644e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.194e-07 2.637e-08
25- 50 1.590e-07 3.568e-08
50-150 2.502e-08 1.189e-08
15-150 3.034e-07 5.754e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 26.7881 (-6.83236 10.0221)
Norm : 1.08539 (-0.285674 0.41248)
------------------------------------------------------------
# Chi-Squared = 58.12 using 59 PHA bins.
# Reduced chi-squared = 1.020 for 57 degrees of freedom
# Null hypothesis probability = 4.336675e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.328e-07 2.448e-08
25- 50 1.421e-07 2.982e-08
50-150 6.673e-08 3.550e-08
15-150 3.416e-07 6.374e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 0.589130 ( )
R1^2/D10^2 : 6.71137E+08 (-7.40657e+08 -7.40704e+08)
kT2 [keV] : 7.17887 (-0.915865 0.552445)
R2^2/D10^2 : 0.204040 (-0.0633596 0.104627)
------------------------------------------------------------
# Chi-Squared = 54.12 using 59 PHA bins.
# Chi-Squared = 53.73 using 59 PHA bins.
# Reduced chi-squared = 0.9841 for 55 degrees of freedom
# Reduced chi-squared = 0.9770 for 55 degrees of freedom
# Null hypothesis probability = 5.080485e-01
# Null hypothesis probability = 5.231090e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.180e-07 3.964e-08
25- 50 1.590e-07 4.694e-08
50-150 3.037e-08 1.520e-08
15-150 3.073e-07 8.931e-08
Plot creation:
Thu Jul 28 14:13:08 EDT 2011