batgrbproduct Analysis for Trigger=540964
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): Mon Dec 10 09:42:45 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger540964/GCN5_download_cron
======================================================================
Trigger: 00540964 Segment: 000
BAT Trigger Time: 376783161.344 [s; MET]
Trigger Stop: 376783162.368 [s; MET]
UTC: 2012-12-09T21:59:11.377440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 326.800843695798 Dec: -8.24449430194564 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.49
Image Trigger?: NO
Rate S/N Ratio: 14.247806848775 [ if not an image trigger ]
Image S/N Ratio: 7.49
Flight Position: [ source = BAT ]
RA: 326.800843695798 Dec: -8.24449430194564 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 326.800052748399 Dec: -8.23217534948005 [deg; J2000]
{ 21h 47m 12.0s , -08d 13' 55.8" }
+/- 1.73623545890979 [arcmin] (estimated 90% radius based on SNR)
+/- 0.919630800654299 [arcmin] (formal 1-sigma fit error)
SNR: 13.8299416968907
Angular difference between Flight and Ground position is 0.740628 arcmin
Partial Coding Fraction: 0.609375 [ including projection effects ]
Duration
T90: 42.7359999418259 +/- 2.04418786715703
Measured from: -0.0199998617172241
to: 42.7160000801086 [s; relative to TRIGTIME]
T50: 13.4319999814034 +/- 1.60428423201527
Measured from: 14.7640001177788
to: 28.1960000991821 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 27.9079999923706
to: 28.9079999923706 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.1599999666214
to: 44.2840000391006 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.057314 1.618835 1.309819 0.346062
0.055818 0.058388 0.052653 0.046081 [error]
Peak 0.064334 0.148023 0.163218 0.064009
0.009142 0.010704 0.010527 0.008751 [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 3.56e-07 6.84e-07 1.02e-06 3.26e-06 2.87e-06 5.32e-06 erg/cm2
Error 2.80e-08 3.15e-08 5.21e-08 3.77e-07 1.28e-07 4.08e-07 erg/cm2
Peak flux Power-law 6.86e-01 9.92e-01 1.07e+00 2.14e+00 3.41e+00 4.89e+00 ph/cm2/s
Error 1.08e-01 9.52e-02 8.10e-02 3.56e-01 2.55e-01 3.98e-01 ph/cm2/s
Fluence Cutoff-PL 3.38e-07 6.96e-07 1.04e-06 2.35e-06 4.42e-06 0.00e+00 erg/cm2
Error 3.47e-08 3.52e-08 5.78e-08 9.29e-07 9.34e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 6.39e-01 1.01e+00 1.10e+00 1.65e+00 3.38e+00 4.40e+00 ph/cm2/s
Error 1.18e-01 1.01e-01 1.04e-01 7.01e-01 2.60e-01 7.38e-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 1.426 0.075 - - 6.43e-03 2.63e-04 37.280 57
CPL 1.193 0.285 184.6 -54.5 8.29e-03 2.59e-03 35.360 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.893 0.128 - - 2.97e-02 2.21e-03 66.410 57
CPL 0.634 0.424 309.4 0.0 3.86e-02 1.82e-02 65.560 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: 43.072000 sec.
T50 in the 50-300 keV band: 11.264000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 46.444 -2.160 44.284
T90 42.736 -0.020 42.716
T50 13.432 14.764 28.196
Peak 1.000 27.908 28.908
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
326.8001 -8.2322 0.0139 33.2 166.0 0.9569 13.8 TRIG_00540964
------------------------------------------
Foreground time interval of the image:
-2.160 13.857 (delta_t = 16.017 [sec])
Background time interval of the image:
-60.344 -2.160 (delta_t = 58.184 [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 -2.160 sec. to 44.284 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42638 ( -0.0752909 0.0752668 )
Norm@50keV : 6.42566E-03 ( -0.000263489 0.00026338 )
------------------------------------------------------------
# Chi-Squared = 37.28 using 59 PHA bins.
# Reduced chi-squared = 0.6540 for 57 degrees of freedom
# Null hypothesis probability = 9.799542e-01
Photon flux (15-150 keV) in 46.44 sec: 0.787340 ( -0.0341806 0.0342568 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.86831e-06 ( -1.27564e-07 1.27946e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.160 sec. to 44.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.19273 ( -0.307071 0.262857 )
Epeak [keV] : 184.551 ( -75.6347 -184.551 )
Norm@50keV : 8.29079E-03 ( -0.00198832 0.00319082 )
------------------------------------------------------------
# Chi-Squared = 35.36 using 59 PHA bins.
# Reduced chi-squared = 0.6315 for 56 degrees of freedom
# Null hypothesis probability = 9.858959e-01
Photon flux (15-150 keV) in 46.44 sec: 0.776248 ( -0.036631 0.03668 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.41671e-06 ( -7.58296e-07 1.11067e-06 ) ergs/cm2
Band function
Time interval is from -2.160 sec. to 44.284 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.887116 ( 0.886574 0.886574 )
beta : -1.52224 ( 1.52248 0.136616 )
Epeak [keV] : 84.0856 ( -84.0006 -84.0006 )
Norm@50keV : 1.28872E-02 ( -0.00659834 0 )
------------------------------------------------------------
# Chi-Squared = 35.14 using 59 PHA bins.
# Reduced chi-squared = 0.6389 for 55 degrees of freedom
# Null hypothesis probability = 9.830324e-01
Photon flux (15-150 keV) in 46.44 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] : 16.7253 ( )
R^2/D10^2 : 6.08506E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 154.36 using 59 PHA bins.
# Reduced chi-squared = 2.7080 for 57 degrees of freedom
# Null hypothesis probability = 6.549141e-11
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.617e-07 1.331e-08
25- 50 7.061e-07 3.947e-08
50-150 1.403e-06 1.087e-07
15-150 2.271e-06 1.052e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.992 ( )
Norm : 3.26003 (-3.26003 -3.26003)
------------------------------------------------------------
# Chi-Squared = 45.38 using 59 PHA bins.
# Reduced chi-squared = 0.7961 for 57 degrees of freedom
# Null hypothesis probability = 8.662858e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.771e-07 1.936e-07
25- 50 7.253e-07 3.720e-07
50-150 1.591e-06 8.143e-07
15-150 2.693e-06 1.374e-06
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.65791 (-1.19492 1.3117)
R1^2/D10^2 : 0.557891 (-0.218526 0.427878)
kT2 [keV] : 28.8698 (-4.12298 6.48136)
R2^2/D10^2 : 7.54360E-03 (-0.00377471 0.00563602)
------------------------------------------------------------
# Chi-Squared = 37.99 using 59 PHA bins.
# Reduced chi-squared = 0.6908 for 55 degrees of freedom
# Null hypothesis probability = 9.609626e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.122e-07 5.292e-08
25- 50 7.138e-07 7.779e-08
50-150 1.792e-06 3.290e-07
15-150 2.818e-06 3.706e-07
Peak spectrum fit
Power-law model
Time interval is from 27.908 sec. to 28.908 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.893237 ( -0.129338 0.125764 )
Norm@50keV : 2.96963E-02 ( -0.00222019 0.00220805 )
------------------------------------------------------------
# Chi-Squared = 66.41 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 57 degrees of freedom
# Null hypothesis probability = 1.844042e-01
Photon flux (15-150 keV) in 1 sec: 3.40832 ( -0.254471 0.254863 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.34153e-07 ( -2.58981e-08 2.59753e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 27.908 sec. to 28.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.634139 ( -0.531463 0.316824 )
Epeak [keV] : 309.387 ( -309.387 -309.387 )
Norm@50keV : 3.85828E-02 ( -0.0104821 0.0259829 )
------------------------------------------------------------
# Chi-Squared = 65.56 using 59 PHA bins.
# Reduced chi-squared = 1.171 for 56 degrees of freedom
# Null hypothesis probability = 1.790565e-01
Photon flux (15-150 keV) in 1 sec: 3.37857 ( -0.26022 0.26043 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.01776e-07 ( -2.1951e-07 3.03274e-07 ) ergs/cm2
Band function
Time interval is from 27.908 sec. to 28.908 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99999 ( -130526 -130526 )
beta : -0.956660 ( -0.199516 0.156442 )
Epeak [keV] : 29.2864 ( -29.2446 9.85514 )
Norm@50keV : 746.087 ( -752.647 3.74074e+06 )
------------------------------------------------------------
# Chi-Squared = 64.48 using 59 PHA bins.
# Reduced chi-squared = 1.172 for 55 degrees of freedom
# Null hypothesis probability = 1.789711e-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] : 23.7451 (-2.3598 2.78231)
R^2/D10^2 : 9.89542E-02 (-0.0285128 0.0380894)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 92.72 using 59 PHA bins.
# Reduced chi-squared = 1.627 for 57 degrees of freedom
# Null hypothesis probability = 1.951412e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.953e-09 1.506e-09
25- 50 5.496e-08 6.225e-09
50-150 2.311e-07 2.560e-08
15-150 2.960e-07 2.670e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 13.6552 ( )
------------------------------------------------------------
# Chi-Squared = 138.20 using 59 PHA bins.
# Reduced chi-squared = 2.4245 for 57 degrees of freedom
# Null hypothesis probability = 1.076332e-08
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.400e-08 1.790e-08
25- 50 6.541e-08 3.442e-08
50-150 1.435e-07 7.525e-08
15-150 2.429e-07 1.284e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.7044 (-2.9196 3.55922)
R1^2/D10^2 : 0.654636 (-0.337138 0.913895)
kT2 [keV] : 45.9914 (-13.5374 61.8388)
R2^2/D10^2 : 1.15842E-02 (-0.00988598 0.013295)
------------------------------------------------------------
# Chi-Squared = 63.58 using 59 PHA bins.
# Reduced chi-squared = 1.156 for 55 degrees of freedom
# Null hypothesis probability = 1.999015e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.843e-08 7.735e-09
25- 50 6.272e-08 2.486e-08
50-150 2.537e-07 1.163e-07
15-150 3.348e-07 1.411e-07
Plot creation:
Mon Dec 10 09:52:23 EST 2012