batgrbproduct Analysis for Trigger=541200
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): Wed Dec 12 04:36:23 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger541200/GCN5_download_cron
======================================================================
Trigger: 00541200 Segment: 000
BAT Trigger Time: 376926432.768 [s; MET]
Trigger Stop: 376926434.816 [s; MET]
UTC: 2012-12-11T13:47:02.795260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 195.544262597769 Dec: 30.1610171473832 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.59
Image Trigger?: NO
Rate S/N Ratio: 13.4536240470737 [ if not an image trigger ]
Image S/N Ratio: 7.59
Flight Position: [ source = BAT ]
RA: 195.544262597769 Dec: 30.1610171473832 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 195.575027446698 Dec: 30.1734520559525 [deg; J2000]
{ 13h 02m 18.0s , +30d 10' 24.4" }
+/- 4.94128587376463 [arcmin] (estimated 90% radius based on SNR)
+/- 2.17625919628196 [arcmin] (formal 1-sigma fit error)
SNR: 3.10397638195885
Angular difference between Flight and Ground position is 1.761680 arcmin
Partial Coding Fraction: 0.2382812 [ including projection effects ]
Duration
T90: 182.707999944687 +/- 39.28730733208
Measured from: 0.988000094890594
to: 183.696000039577 [s; relative to TRIGTIME]
T50: 76.7159999608994 +/- 29.6762135240717
Measured from: 91.6440001130104
to: 168.36000007391 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.06800001859665
to: 2.06800001859665 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.476000010967255
to: 196.772000014782 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.170950 1.070378 0.411273 0.026069
0.105089 0.107869 0.093739 0.082202 [error]
Peak 0.029138 0.041157 0.056697 0.022804
0.013257 0.013186 0.012545 0.010026 [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 3.95e-07 4.33e-07 3.38e-07 4.34e-07 1.33e-06 1.60e-06 erg/cm2
Error 6.12e-08 5.46e-08 8.72e-08 2.16e-07 1.95e-07 3.26e-07 erg/cm2
Peak flux Power-law 2.22e-01 3.08e-01 3.15e-01 5.90e-01 1.03e+00 1.43e+00 ph/cm2/s
Error 1.45e-01 1.23e-01 9.02e-02 4.01e-01 3.14e-01 4.26e-01 ph/cm2/s
Fluence Cutoff-PL 3.95e-07 4.33e-07 3.38e-07 4.30e-07 1.60e-06 0.00e+00 erg/cm2
Error 6.18e-08 6.15e-08 6.77e-08 2.24e-07 3.44e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 2.21e-01 3.08e-01 3.16e-01 5.86e-01 1.03e+00 1.43e+00 ph/cm2/s
Error 1.24e-01 1.10e-01 9.96e-02 4.15e-01 3.13e-01 5.20e-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 2.356 0.264 - - 6.97e-04 1.29e-04 54.550 57
CPL 1.988 0.000 1.3 14.4 1.14e-03 0.00e+00 55.370 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.965 0.549 - - 8.99e-03 2.70e-03 38.290 57
CPL 2.871 0.000 241.6 0.0 3.36e-04 0.00e+00 38.260 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: 58.368000 sec.
T50 in the 50-300 keV band: 33.152000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 197.248 -0.476 196.772
T90 182.708 0.988 183.696
T50 76.716 91.644 168.360
Peak 1.000 1.068 2.068
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
195.5750 +30.1735 0.0621 33.4 87.3 0.3776 3.1 TRIG_00541200
------------------------------------------
Foreground time interval of the image:
-0.476 24.433 (delta_t = 24.909 [sec])
Background time interval of the image:
-239.768 -0.476 (delta_t = 239.292 [sec])
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 -0.476 sec. to 196.772 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.35621 ( -0.250018 0.277378 )
Norm@50keV : 6.96886E-04 ( -0.000131179 0.000127158 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9570 for 57 degrees of freedom
# Null hypothesis probability = 5.675453e-01
Photon flux (15-150 keV) in 197.2 sec: 0.125713 ( -0.0144595 0.0144605 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.32783e-06 ( -1.91424e-07 1.97703e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.476 sec. to 196.772 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98818 ( -1.98818 -1.98818 )
Epeak [keV] : 1.31991 ( -0.62384 28.219 )
Norm@50keV : 1.14000E-03 ( )
------------------------------------------------------------
# Chi-Squared = 55.37 using 59 PHA bins.
# Reduced chi-squared = 0.9887 for 56 degrees of freedom
# Null hypothesis probability = 4.988308e-01
Photon flux (15-150 keV) in 197.2 sec: 0.125665 ( -0.014502 0.01445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.59622e-06 ( -3.37157e-07 3.49866e-07 ) ergs/cm2
Band function
Time interval is from -0.476 sec. to 196.772 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.94003 ( 77.3061 77.3061 )
beta : -2.35622 ( -0.277369 0.250259 )
Epeak [keV] : 7.96911 ( -7.96911 -7.96911 )
Norm@50keV : 9.47161E-02 ( -0.0178286 0.0172831 )
------------------------------------------------------------
# Chi-Squared = 54.55 using 59 PHA bins.
# Reduced chi-squared = 0.9918 for 55 degrees of freedom
# Null hypothesis probability = 4.917704e-01
Photon flux (15-150 keV) in 197.2 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] : 7.87582 (-1.2005 1.3932)
R^2/D10^2 : 0.138693 (-0.0656697 0.133522)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 77.46 using 59 PHA bins.
# Reduced chi-squared = 1.359 for 57 degrees of freedom
# Null hypothesis probability = 3.704488e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.032e-07 6.103e-08
25- 50 5.163e-07 9.633e-08
50-150 1.287e-07 4.969e-08
15-150 9.482e-07 1.542e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 40.4944 (-11.5697 18.444)
Norm : 0.792317 (-0.173704 0.247989)
------------------------------------------------------------
# Chi-Squared = 58.23 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.298392e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.603e-07 5.748e-08
25- 50 4.765e-07 6.813e-08
50-150 3.736e-07 1.318e-07
15-150 1.210e-06 2.009e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.54826 (-1.16813 1.59515)
R1^2/D10^2 : 3.22181 (-2.57664 26.8593)
kT2 [keV] : 13.7041 (-3.49543 6.80221)
R2^2/D10^2 : 1.17436E-02 (-0.00952475 0.0254332)
------------------------------------------------------------
# Chi-Squared = 55.59 using 59 PHA bins.
# Reduced chi-squared = 1.011 for 55 degrees of freedom
# Null hypothesis probability = 4.525486e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.055e-07 2.071e-07
25- 50 4.143e-07 1.896e-07
50-150 4.101e-07 2.392e-07
15-150 1.230e-06 6.413e-07
Peak spectrum fit
Power-law model
Time interval is from 1.068 sec. to 2.068 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.964717 ( -0.593755 0.504753 )
Norm@50keV : 8.98697E-03 ( -0.00277973 0.00262711 )
------------------------------------------------------------
# Chi-Squared = 38.29 using 59 PHA bins.
# Reduced chi-squared = 0.6717 for 57 degrees of freedom
# Null hypothesis probability = 9.730633e-01
Photon flux (15-150 keV) in 1 sec: 1.03303 ( -0.311135 0.316118 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.84183e-08 ( -2.82108e-08 2.84494e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.068 sec. to 2.068 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.87064 ( )
Epeak [keV] : 241.561 ( )
Norm@50keV : 3.36285E-04 ( )
------------------------------------------------------------
# Chi-Squared = 38.26 using 59 PHA bins.
# Reduced chi-squared = 0.6832 for 56 degrees of freedom
# Null hypothesis probability = 9.664081e-01
Photon flux (15-150 keV) in 1 sec: 1.03251 ( -0.310335 0.31629 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.4813e-07 ( -2.4813e-07 1.78705e-07 ) ergs/cm2
Band function
Time interval is from 1.068 sec. to 2.068 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.801129 ( 0.801129 0.801129 )
beta : -0.964710 ( 0.96471 0.593759 )
Epeak [keV] : 48.8614 ( -48.8614 -48.8614 )
Norm@50keV : 1.47162E-02 ( -0.00821738 22993.5 )
------------------------------------------------------------
# Chi-Squared = 38.29 using 59 PHA bins.
# Reduced chi-squared = 0.6961 for 55 degrees of freedom
# Null hypothesis probability = 9.578172e-01
Photon flux (15-150 keV) in 1 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] : 24.1227 (-8.44697 20.5862)
R^2/D10^2 : 2.71459E-02 (-0.026999 0.082835)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 41.48 using 59 PHA bins.
# Reduced chi-squared = 0.7277 for 57 degrees of freedom
# Null hypothesis probability = 9.391370e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.796e-09 1.842e-09
25- 50 1.557e-08 9.340e-09
50-150 6.746e-08 4.000e-08
15-150 8.583e-08 5.220e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.999 ( )
Norm : 4.41871 (-4.41871 -4.41871)
------------------------------------------------------------
# Chi-Squared = 42.21 using 59 PHA bins.
# Reduced chi-squared = 0.7406 for 57 degrees of freedom
# Null hypothesis probability = 9.282391e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.100e-08 6.410e-09
25- 50 2.117e-08 1.257e-08
50-150 4.642e-08 2.671e-08
15-150 7.859e-08 4.563e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.7141 (-4.64528 11.6064)
R1^2/D10^2 : 0.244570 (-0.21037 4.17174)
kT2 [keV] : 71.0454 (-75.2326 -75.2327)
R2^2/D10^2 : 1.23708E-03 (-0.00101717 0.0298064)
------------------------------------------------------------
# Chi-Squared = 37.76 using 59 PHA bins.
# Reduced chi-squared = 0.6866 for 55 degrees of freedom
# Null hypothesis probability = 9.632823e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.344e-09 4.134e-09
25- 50 1.989e-08 1.319e-08
50-150 7.436e-08 3.715e-08
15-150 1.006e-07 4.633e-08
Plot creation:
Wed Dec 12 05:04:36 EST 2012