batgrbproduct Analysis for Trigger=514767
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 23:10:40 EST 2012
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger514767/GCN5_download_cron
======================================================================
Trigger: 00514767 Segment: 000
BAT Trigger Time: 350785647.424 [s; MET]
Trigger Stop: 350785648.448 [s; MET]
UTC: 2012-02-13T00:27:19.539240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 301.032042264378 Dec: 65.3975709325225 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 13.83
Image Trigger?: NO
Rate S/N Ratio: 25.298221281347 [ if not an image trigger ]
Image S/N Ratio: 13.83
Flight Position: [ source = BAT ]
RA: 301.032042264378 Dec: 65.3975709325225 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.98677402785 Dec: 65.4132922753022 [deg; J2000]
{ 20h 03m 56.8s , +65d 24' 47.9" }
+/- 0.68969286260005 [arcmin] (estimated 90% radius based on SNR)
+/- 0.183109748653405 [arcmin] (formal 1-sigma fit error)
SNR: 51.7142453955038
Angular difference between Flight and Ground position is 1.472289 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 41.0239999890327 +/- 12.7803794789734
Measured from: -3.43199992179871
to: 37.592000067234 [s; relative to TRIGTIME]
T50: 15.3359999060631 +/- 1.47014016815968
Measured from: 2.14800012111664
to: 17.4840000271797 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.4439999461174
to: 6.4439999461174 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.31200003623962
to: 74.4599999785423 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.824929 1.556561 0.559534 0.133657
0.045411 0.045402 0.038541 0.032943 [error]
Peak 0.090507 0.081369 0.035806 0.006179
0.005769 0.005708 0.004581 0.003690 [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 5.59e-07 6.08e-07 4.70e-07 5.97e-07 1.86e-06 2.23e-06 erg/cm2
Error 3.59e-08 2.43e-08 3.61e-08 9.28e-08 8.03e-08 1.30e-07 erg/cm2
Peak flux Power-law 8.09e-01 5.76e-01 2.71e-01 1.79e-01 1.74e+00 1.83e+00 ph/cm2/s
Error 9.43e-02 4.58e-02 3.76e-02 4.73e-02 1.39e-01 1.46e-01 ph/cm2/s
Fluence Cutoff-PL 5.27e-07 6.34e-07 4.47e-07 2.46e-07 1.85e-06 0.00e+00 erg/cm2
Error 4.32e-08 3.15e-08 4.39e-08 1.73e-07 2.16e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 8.03e-01 5.81e-01 2.70e-01 1.58e-01 1.74e+00 1.81e+00 ph/cm2/s
Error 1.00e-01 5.47e-02 3.87e-02 8.16e-02 1.43e-01 1.73e-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 2.370 0.090 - - 2.38e-03 1.27e-04 64.470 57
CPL 1.871 0.000 10.4 0.0 4.60e-03 0.00e+00 59.550 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.089 0.157 - - 1.11e-02 1.15e-03 50.850 57
CPL 1.989 0.301 4.7 -0.8 1.27e-02 0.00e+00 50.790 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: 15.488000 sec.
T50 in the 50-300 keV band: 7.808000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 80.772 -6.312 74.460
T90 41.024 -3.432 37.592
T50 15.336 2.148 17.484
Peak 1.000 5.444 6.444
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.9868 +65.4133 0.0037 5.8 130.7 2.4152 51.7 TRIG_00514767
------------------------------------------
Foreground time interval of the image:
-6.312 10.677 (delta_t = 16.989 [sec])
Background time interval of the image:
-239.424 -10.794 (delta_t = 228.630 [sec])
-10.424 -6.312 (delta_t = 4.112 [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 -6.312 sec. to 74.460 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.36958 ( -0.0889877 0.090912 )
Norm@50keV : 2.37809E-03 ( -0.000127836 0.000126724 )
------------------------------------------------------------
# Chi-Squared = 64.47 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 57 degrees of freedom
# Null hypothesis probability = 2.318432e-01
Photon flux (15-150 keV) in 80.77 sec: 0.432300 ( -0.0185569 0.0186377 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.86113e-06 ( -8.00461e-08 8.05376e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.312 sec. to 74.460 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.87150 ( )
Epeak [keV] : 10.4135 ( )
Norm@50keV : 4.59748E-03 ( )
------------------------------------------------------------
# Chi-Squared = 59.55 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 56 degrees of freedom
# Null hypothesis probability = 3.476961e-01
Photon flux (15-150 keV) in 80.77 sec: 0.416902 ( -0.021745 0.021854 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.85455e-06 ( -1.66378e-07 2.64837e-07 ) ergs/cm2
Band function
Time interval is from -6.312 sec. to 74.460 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.17150 ( )
beta : -8.92831 ( )
Epeak [keV] : 60.7371 ( )
Norm@50keV : 5.72274E-03 ( )
------------------------------------------------------------
# Chi-Squared = 175.85 using 59 PHA bins.
# Reduced chi-squared = 3.1974 for 55 degrees of freedom
# Null hypothesis probability = 1.467255e-14
Photon flux (15-150 keV) in 80.77 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] : 8.83669 ( )
R^2/D10^2 : 0.287557 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 147.97 using 59 PHA bins.
# Reduced chi-squared = 2.5959 for 57 degrees of freedom
# Null hypothesis probability = 5.113232e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.497e-07 2.411e-08
25- 50 7.221e-07 3.037e-08
50-150 2.604e-07 3.057e-08
15-150 1.332e-06 5.896e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 41.1180 (-4.26408 4.99566)
Norm : 2.62899 (-0.233967 0.261194)
------------------------------------------------------------
# Chi-Squared = 63.03 using 59 PHA bins.
# Reduced chi-squared = 1.106 for 57 degrees of freedom
# Null hypothesis probability = 2.717150e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.921e-07 3.150e-08
25- 50 6.550e-07 2.637e-08
50-150 5.221e-07 6.239e-08
15-150 1.669e-06 7.067e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.97333 (-0.821537 0.98081)
R1^2/D10^2 : 2.14914 (-1.04563 2.39968)
kT2 [keV] : 14.4898 (-2.13022 3.84137)
R2^2/D10^2 : 2.65716E-02 (-0.0174074 0.0293398)
------------------------------------------------------------
# Chi-Squared = 65.85 using 59 PHA bins.
# Reduced chi-squared = 1.197 for 55 degrees of freedom
# Null hypothesis probability = 1.500956e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.080e-07 8.856e-08
25- 50 6.310e-07 9.963e-08
50-150 5.234e-07 1.342e-07
15-150 1.662e-06 2.710e-07
Peak spectrum fit
Power-law model
Time interval is from 5.444 sec. to 6.444 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.08887 ( -0.15398 0.16019 )
Norm@50keV : 1.11315E-02 ( -0.00116426 0.00114193 )
------------------------------------------------------------
# Chi-Squared = 50.85 using 59 PHA bins.
# Reduced chi-squared = 0.8921 for 57 degrees of freedom
# Null hypothesis probability = 7.036460e-01
Photon flux (15-150 keV) in 1 sec: 1.74171 ( -0.139015 0.13907 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.03315e-07 ( -9.72694e-09 9.87783e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.444 sec. to 6.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98881 ( -0.57468 0.0280855 )
Epeak [keV] : 4.66793 ( -2.62321 -4.15027 )
Norm@50keV : 1.27224E-02 ( )
------------------------------------------------------------
# Chi-Squared = 50.79 using 59 PHA bins.
# Reduced chi-squared = 0.9071 for 56 degrees of freedom
# Null hypothesis probability = 6.716276e-01
Photon flux (15-150 keV) in 1 sec: 1.73594 ( -0.14381 0.14265 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.29e-07 ( -3.12013e-08 2.6436e-08 ) ergs/cm2
Band function
Time interval is from 5.444 sec. to 6.444 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99380 ( -320.069 -310.069 )
beta : -2.22092 ( -0.207132 0.187091 )
Epeak [keV] : 21.3824 ( -5.30308 2.994 )
Norm@50keV : 5497.51 ( -3216.88 80161.8 )
------------------------------------------------------------
# Chi-Squared = 47.41 using 59 PHA bins.
# Reduced chi-squared = 0.8620 for 55 degrees of freedom
# Null hypothesis probability = 7.565701e-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] : 8.69433 (-0.871713 0.990659)
R^2/D10^2 : 1.33606 (-0.464336 0.703817)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 92.81 using 59 PHA bins.
# Reduced chi-squared = 1.628 for 57 degrees of freedom
# Null hypothesis probability = 1.911365e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.929e-08 2.555e-09
25- 50 3.882e-08 4.250e-09
50-150 1.331e-08 3.297e-09
15-150 7.142e-08 8.075e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 57.9124 (-12.998 18.7488)
Norm : 9.17467 (-1.29056 1.46785)
------------------------------------------------------------
# Chi-Squared = 54.25 using 59 PHA bins.
# Reduced chi-squared = 0.9517 for 57 degrees of freedom
# Null hypothesis probability = 5.790734e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.292e-08 2.505e-09
25- 50 3.450e-08 2.905e-09
50-150 3.811e-08 8.375e-09
15-150 9.553e-08 9.660e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.37420 (-1.23352 1.34451)
R1^2/D10^2 : 6.85058 (-2.38255 5.05076)
kT2 [keV] : 20.4184 (-6.21889 11.1322)
R2^2/D10^2 : 3.12858E-02 (-0.0127947 0.0363302)
------------------------------------------------------------
# Chi-Squared = 49.33 using 59 PHA bins.
# Reduced chi-squared = 0.8970 for 55 degrees of freedom
# Null hypothesis probability = 6.899554e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.454e-08 1.286e-08
25- 50 2.972e-08 1.166e-08
50-150 3.999e-08 2.286e-08
15-150 9.426e-08 4.671e-08
Plot creation:
Sun Feb 12 23:28:53 EST 2012