batgrbproduct Analysis for Trigger=514709
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): Sun Feb 12 22:41:31 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger514709/GCN5_download_cron
======================================================================
Trigger: 00514709 Segment: 000
BAT Trigger Time: 350730690.624 [s; MET]
Trigger Stop: 350730691.648 [s; MET]
UTC: 2012-02-12T09:11:22.741460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 43.1047306460246 Dec: -18.0251590236093 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.09
Image Trigger?: NO
Rate S/N Ratio: 11.5325625946708 [ if not an image trigger ]
Image S/N Ratio: 9.09
Flight Position: [ source = BAT ]
RA: 43.1047306460246 Dec: -18.0251590236093 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 43.0858692674211 Dec: -18.0425224209617 [deg; J2000]
{ 02h 52m 20.6s , -18d 02' 33.1" }
+/- 1.61865446018262 [arcmin] (estimated 90% radius based on SNR)
+/- 0.723375326397999 [arcmin] (formal 1-sigma fit error)
SNR: 15.287157483803
Angular difference between Flight and Ground position is 1.497772 arcmin
Partial Coding Fraction: 0.2265625 [ including projection effects ]
Duration
T90: 5.51999998092651 +/- 1.04000004896751
Measured from: -0.375999867916107
to: 5.14400011301041 [s; relative to TRIGTIME]
T50: 2.75200003385544 +/- 0.638798883539131
Measured from: 0.424000084400177
to: 3.17600011825562 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0200000405311584
to: 0.979999959468842 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.759999990463257
to: 6.08799999952316 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.304085 0.367561 0.192239 0.026820
0.029372 0.030382 0.026378 0.022470 [error]
Peak 0.085226 0.091088 0.044441 0.012377
0.012183 0.012703 0.011006 0.008799 [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 1.19e-07 1.57e-07 1.51e-07 2.60e-07 5.13e-07 6.87e-07 erg/cm2
Error 1.70e-08 1.56e-08 2.58e-08 8.76e-08 5.94e-08 1.16e-07 erg/cm2
Peak flux Power-law 9.21e-01 7.02e-01 3.58e-01 2.62e-01 2.10e+00 2.24e+00 ph/cm2/s
Error 2.09e-01 1.11e-01 8.79e-02 1.22e-01 3.34e-01 3.55e-01 ph/cm2/s
Fluence Cutoff-PL 1.15e-07 1.64e-07 1.51e-07 1.41e-07 5.71e-07 0.00e+00 erg/cm2
Error 1.89e-08 2.01e-08 2.77e-08 1.67e-07 1.66e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.70e-01 7.53e-01 3.62e-01 1.29e-01 2.07e+00 2.11e+00 ph/cm2/s
Error 2.33e-01 1.50e-01 1.00e-01 1.86e-01 3.40e-01 3.96e-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 2.19e+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 2.053 0.188 - - 8.10e-03 1.00e-03 62.860 57
CPL 1.685 0.650 37.5 0.0 1.30e-02 0.00e+00 61.970 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.973 0.280 - - 1.42e-02 2.69e-03 75.660 57
CPL 1.406 1.106 45.4 0.0 2.98e-02 0.00e+00 74.860 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: 4.800000 sec.
T50 in the 50-300 keV band: 2.048000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 6.848 -0.760 6.088
T90 5.520 -0.376 5.144
T50 2.752 0.424 3.176
Peak 1.000 -0.020 0.980
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
43.0859 -18.0425 0.0125 41.9 -51.8 0.9281 15.3 TRIG_00514709
------------------------------------------
Foreground time interval of the image:
-0.760 6.088 (delta_t = 6.848 [sec])
Background time interval of the image:
-239.624 -0.760 (delta_t = 238.864 [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 -0.760 sec. to 6.088 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.05258 ( -0.183076 0.193505 )
Norm@50keV : 8.10218E-03 ( -0.00101673 0.000992446 )
------------------------------------------------------------
# Chi-Squared = 62.86 using 59 PHA bins.
# Reduced chi-squared = 1.103 for 57 degrees of freedom
# Null hypothesis probability = 2.766893e-01
Photon flux (15-150 keV) in 6.848 sec: 1.24566 ( -0.124248 0.124334 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.13395e-07 ( -5.89972e-08 5.98712e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.760 sec. to 6.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.68460 ( -0.764093 0.535042 )
Epeak [keV] : 37.4647 ( )
Norm@50keV : 1.30398E-02 ( )
------------------------------------------------------------
# Chi-Squared = 61.97 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 56 degrees of freedom
# Null hypothesis probability = 2.718058e-01
Photon flux (15-150 keV) in 6.848 sec: 1.22816 ( -0.12794 0.12797 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.70942e-07 ( -1.17427e-07 2.14106e-07 ) ergs/cm2
Band function
Time interval is from -0.760 sec. to 6.088 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.155636 ( 1.88572 1.88572 )
beta : 10.00000 ( -1.97895e+15 -1.97895e+15 )
Epeak [keV] : 1.99665 ( )
Norm@50keV : 2.59814E-19 ( )
------------------------------------------------------------
# Chi-Squared = 162.79 using 59 PHA bins.
# Reduced chi-squared = 2.9598 for 55 degrees of freedom
# Null hypothesis probability = 1.349245e-12
Photon flux (15-150 keV) in 6.848 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] : 9.66092 (-1.2046 1.43785)
R^2/D10^2 : 0.642726 (-0.264549 0.436597)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 88.52 using 59 PHA bins.
# Reduced chi-squared = 1.553 for 57 degrees of freedom
# Null hypothesis probability = 4.716524e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.261e-08 1.425e-08
25- 50 1.954e-07 2.455e-08
50-150 9.223e-08 2.486e-08
15-150 3.703e-07 4.753e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 64.8868 (-16.9545 26.2707)
Norm : 6.27095 (-0.986822 1.1569)
------------------------------------------------------------
# Chi-Squared = 62.67 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.821744e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.092e-07 1.544e-08
25- 50 1.701e-07 1.911e-08
50-150 2.062e-07 5.198e-08
15-150 4.854e-07 6.088e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.80824 (-1.35447 1.43658)
R1^2/D10^2 : 3.42028 (-1.88367 6.31572)
kT2 [keV] : 20.6282 (-4.93199 8.39011)
R2^2/D10^2 : 2.44061E-02 (-0.0179147 0.0507847)
------------------------------------------------------------
# Chi-Squared = 60.87 using 59 PHA bins.
# Reduced chi-squared = 1.107 for 55 degrees of freedom
# Null hypothesis probability = 2.730447e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.136e-07 5.367e-08
25- 50 1.617e-07 5.338e-08
50-150 2.253e-07 1.235e-07
15-150 5.006e-07 1.951e-07
Peak spectrum fit
Power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.97259 ( -0.269624 0.291101 )
Norm@50keV : 1.41874E-02 ( -0.00273205 0.00264663 )
------------------------------------------------------------
# Chi-Squared = 75.66 using 59 PHA bins.
# Reduced chi-squared = 1.327 for 57 degrees of freedom
# Null hypothesis probability = 4.968529e-02
Photon flux (15-150 keV) in 1 sec: 2.10174 ( -0.334251 0.33445 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.30668e-07 ( -2.36918e-08 2.41264e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.40574 ( -1.45946 0.751977 )
Epeak [keV] : 45.3968 ( )
Norm@50keV : 2.98223E-02 ( )
------------------------------------------------------------
# Chi-Squared = 74.86 using 59 PHA bins.
# Reduced chi-squared = 1.337 for 56 degrees of freedom
# Null hypothesis probability = 4.695679e-02
Photon flux (15-150 keV) in 1 sec: 2.07100 ( -0.34073 0.33978 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.38612e-07 ( -3.8186e-08 8.4825e-08 ) ergs/cm2
Band function
Time interval is from -0.020 sec. to 0.980 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.40573 ( 1.48058 1.44318 )
beta : -10.00000 ( 2.95177e+11 2.95177e+11 )
Epeak [keV] : 45.3881 ( -43.376 -45.3881 )
Norm@50keV : 2.98183E-02 ( -0.0175758 0.184459 )
------------------------------------------------------------
# Chi-Squared = 74.86 using 59 PHA bins.
# Reduced chi-squared = 1.361 for 55 degrees of freedom
# Null hypothesis probability = 3.871930e-02
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] : 9.89987 (-1.64773 2.09938)
R^2/D10^2 : 1.03203 (-0.542469 1.05856)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 82.07 using 59 PHA bins.
# Reduced chi-squared = 1.440 for 57 degrees of freedom
# Null hypothesis probability = 1.648325e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.053e-08 5.320e-09
25- 50 5.031e-08 1.122e-08
50-150 2.550e-08 9.915e-09
15-150 9.634e-08 2.406e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 71.1530 (-26.6782 56.6918)
Norm : 10.3497 (-2.32525 3.06171)
------------------------------------------------------------
# Chi-Squared = 74.86 using 59 PHA bins.
# Reduced chi-squared = 1.313 for 57 degrees of freedom
# Null hypothesis probability = 5.646817e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.660e-08 5.980e-09
25- 50 4.250e-08 8.475e-09
50-150 5.526e-08 2.828e-08
15-150 1.244e-07 3.184e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.44572 (-3.83485 2.4116)
R1^2/D10^2 : 2.47115 (-1.52878 34.1495)
kT2 [keV] : 27.0204 (-14.4718 -27.025)
R2^2/D10^2 : 1.30371E-02 (-0.0129372 0.0420669)
------------------------------------------------------------
# Chi-Squared = 74.82 using 59 PHA bins.
# Reduced chi-squared = 1.360 for 55 degrees of freedom
# Null hypothesis probability = 3.894455e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.494e-08 1.348e-08
25- 50 4.529e-08 2.498e-08
50-150 5.719e-08 3.382e-08
15-150 1.274e-07 6.530e-08
Plot creation:
Sun Feb 12 23:06:02 EST 2012