batgrbproduct Analysis for Trigger=506519
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): Sat Oct 29 18:40:44 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger506519/GCN5_download_cron
======================================================================
Trigger: 00506519 Segment: 000
BAT Trigger Time: 341574288 [s; MET]
Trigger Stop: 341574384 [s; MET]
UTC: 2011-10-29T09:44:40.483020 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 44.6907552668095 Dec: 57.0853287279398 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.71
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.71
Flight Position: [ source = BAT ]
RA: 44.6907552668095 Dec: 57.0853287279398 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 44.7844389194311 Dec: 57.1040094479605 [deg; J2000]
{ 02h 59m 08.3s , +57d 06' 14.4" }
+/- 1.16828262223314 [arcmin] (estimated 90% radius based on SNR)
+/- 0.515780487066168 [arcmin] (formal 1-sigma fit error)
SNR: 24.3568631496149
Angular difference between Flight and Ground position is 3.252839 arcmin
Partial Coding Fraction: 0.75 [ including projection effects ]
Duration
T90: 6.77999997138977 +/- 0.790647833242495
Measured from: 21.1960000991821
to: 27.9760000705719 [s; relative to TRIGTIME]
T50: 3.69599992036819 +/- 0.488147515975038
Measured from: 22.7160001397133
to: 26.4120000600815 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 23.6159999966621
to: 24.6159999966621 [s; relative to TRIGTIME]
Total Fluence
Measured from: 20.7239999771118
to: 29.1959999799728 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.317543 0.358760 0.141308 0.023738
0.019243 0.019720 0.016445 0.013779 [error]
Peak 0.076472 0.068394 0.026671 0.000649
0.006919 0.007214 0.005972 0.004855 [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 1.03e-07 1.31e-07 1.21e-07 1.97e-07 4.22e-07 5.52e-07 erg/cm2
Error 9.93e-09 9.26e-09 1.50e-08 4.71e-08 3.49e-08 6.49e-08 erg/cm2
Peak flux Power-law 7.25e-01 4.79e-01 2.06e-01 1.22e-01 1.47e+00 1.53e+00 ph/cm2/s
Error 1.07e-01 5.80e-02 4.53e-02 4.84e-02 1.70e-01 1.81e-01 ph/cm2/s
Fluence Cutoff-PL 9.33e-08 1.51e-07 1.07e-07 3.73e-07 3.78e-07 0.00e+00 erg/cm2
Error 1.13e-08 1.33e-08 1.99e-08 3.74e-08 4.59e-08 0.00e+00 erg/cm2
Peak flux Cutoff-PL 6.83e-01 5.51e-01 1.82e-01 2.30e-02 1.44e+00 1.44e+00 ph/cm2/s
Error 1.17e-01 8.19e-02 5.97e-02 4.18e-02 1.70e-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 2.110 0.131 - - 5.36e-03 4.85e-04 65.520 57
CPL 0.769 0.718 36.1 5.7 3.36e-02 0.00e+00 51.430 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.217 0.221 - - 8.80e-03 1.48e-03 59.720 57
CPL 1.000 1.112 30.4 0.0 5.07e-02 0.00e+00 54.780 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: 8.896000 sec.
T50 in the 50-300 keV band: 3.776000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.472 20.724 29.196
T90 6.780 21.196 27.976
T50 3.696 22.716 26.412
Peak 1.000 23.616 24.616
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
44.7844 +57.1040 0.0079 16.8 95.8 0.8891 24.4 TRIG_00506519
------------------------------------------
Foreground time interval of the image:
20.724 29.196 (delta_t = 8.472 [sec])
Background time interval of the image:
-239.000 20.724 (delta_t = 259.724 [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 20.724 sec. to 29.196 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.11041 ( -0.128449 0.133445 )
Norm@50keV : 5.35526E-03 ( -0.000487736 0.000481989 )
------------------------------------------------------------
# Chi-Squared = 65.52 using 59 PHA bins.
# Reduced chi-squared = 1.150 for 57 degrees of freedom
# Null hypothesis probability = 2.051822e-01
Photon flux (15-150 keV) in 8.472 sec: 0.846876 ( -0.059354 0.0593719 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.21967e-07 ( -3.46375e-08 3.51476e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 20.724 sec. to 29.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.768815 ( -0.776659 0.658643 )
Epeak [keV] : 36.1360 ( -6.0669 5.32691 )
Norm@50keV : 3.35792E-02 ( )
------------------------------------------------------------
# Chi-Squared = 51.43 using 59 PHA bins.
# Reduced chi-squared = 0.9185 for 56 degrees of freedom
# Null hypothesis probability = 6.481313e-01
Photon flux (15-150 keV) in 8.472 sec: 0.806918 ( -0.061474 0.061732 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.72952e-07 ( -3.6039e-08 3.8806e-08 ) ergs/cm2
Band function
Time interval is from 20.724 sec. to 29.196 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.517274 ( -0.903425 2.45355 )
beta : -3.04009 ( 3.04418 0.650115 )
Epeak [keV] : 35.0418 ( -6.98121 6.21768 )
Norm@50keV : 4.95044E-02 ( -0.0306631 3.24535 )
------------------------------------------------------------
# Chi-Squared = 51.35 using 59 PHA bins.
# Reduced chi-squared = 0.9336 for 55 degrees of freedom
# Null hypothesis probability = 6.149324e-01
Photon flux (15-150 keV) in 8.472 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] : 9.35170 (-0.689656 0.744189)
R^2/D10^2 : 0.510901 (-0.133367 0.180205)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 70.09 using 59 PHA bins.
# Reduced chi-squared = 1.230 for 57 degrees of freedom
# Null hypothesis probability = 1.141500e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.508e-08 7.748e-09
25- 50 1.693e-07 1.339e-08
50-150 7.251e-08 1.559e-08
15-150 3.168e-07 2.686e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 52.7836 (-9.08082 12.334)
Norm : 4.69149 (-0.519751 0.632939)
------------------------------------------------------------
# Chi-Squared = 53.23 using 59 PHA bins.
# Reduced chi-squared = 0.9339 for 57 degrees of freedom
# Null hypothesis probability = 6.171169e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.834e-08 1.008e-08
25- 50 1.439e-07 1.051e-08
50-150 1.469e-07 2.906e-08
15-150 3.892e-07 3.482e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.77714 (-1.81799 1.78834)
R1^2/D10^2 : 2.01541 (-1.10646 5.24858)
kT2 [keV] : 14.7383 (-3.40008 8.13828)
R2^2/D10^2 : 5.55628E-02 (-0.0484286 0.0822794)
------------------------------------------------------------
# Chi-Squared = 51.35 using 59 PHA bins.
# Reduced chi-squared = 0.9336 for 55 degrees of freedom
# Null hypothesis probability = 6.149449e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.303e-08 4.337e-08
25- 50 1.496e-07 6.151e-08
50-150 1.282e-07 6.555e-08
15-150 3.708e-07 1.575e-07
Peak spectrum fit
Power-law model
Time interval is from 23.616 sec. to 24.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.21687 ( -0.212235 0.229917 )
Norm@50keV : 8.80280E-03 ( -0.00149394 0.0014695 )
------------------------------------------------------------
# Chi-Squared = 59.72 using 59 PHA bins.
# Reduced chi-squared = 1.048 for 57 degrees of freedom
# Null hypothesis probability = 3.771587e-01
Photon flux (15-150 keV) in 1 sec: 1.47038 ( -0.170279 0.170302 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.29661e-08 ( -1.19548e-08 1.23302e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.616 sec. to 24.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.999739 ( -1.25961 0.963609 )
Epeak [keV] : 30.4199 ( )
Norm@50keV : 5.06646E-02 ( )
------------------------------------------------------------
# Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9783 for 56 degrees of freedom
# Null hypothesis probability = 5.209381e-01
Photon flux (15-150 keV) in 1 sec: 1.43532 ( -0.16992 0.17073 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.44902e-08 ( -1.1828e-08 1.32183e-08 ) ergs/cm2
Band function
Time interval is from 23.616 sec. to 24.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.999580 ( -0.871823 1.33751 )
beta : -10.00000 ( 7.15663e+07 7.15663e+07 )
Epeak [keV] : 30.4137 ( -25.9167 8.86689 )
Norm@50keV : 5.06751E-02 ( -0.050674 0.280479 )
------------------------------------------------------------
# Chi-Squared = 54.78 using 59 PHA bins.
# Reduced chi-squared = 0.9961 for 55 degrees of freedom
# Null hypothesis probability = 4.828136e-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] : 8.16449 (-1.03867 1.1893)
R^2/D10^2 : 1.53181 (-0.637336 1.09722)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 63.71 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.523830e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.874e-08 3.630e-09
25- 50 3.396e-08 5.550e-09
50-150 9.532e-09 3.527e-09
15-150 6.223e-08 1.014e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 43.9924 (-11.2435 17.2495)
Norm : 9.10625 (-1.67905 2.22134)
------------------------------------------------------------
# Chi-Squared = 55.04 using 59 PHA bins.
# Reduced chi-squared = 0.9655 for 57 degrees of freedom
# Null hypothesis probability = 5.491255e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.154e-08 3.005e-09
25- 50 2.948e-08 4.365e-09
50-150 2.523e-08 9.480e-09
15-150 7.625e-08 1.322e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.27743 (-1.70149 1.75944)
R1^2/D10^2 : 5.82737 (-3.61075 7.09454)
kT2 [keV] : 14.6012 (-4.36575 9.89485)
R2^2/D10^2 : 9.43297E-02 (-0.0851573 0.403784)
------------------------------------------------------------
# Chi-Squared = 53.59 using 59 PHA bins.
# Reduced chi-squared = 0.9744 for 55 degrees of freedom
# Null hypothesis probability = 5.286474e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.173e-08 1.131e-08
25- 50 2.941e-08 1.495e-08
50-150 2.416e-08 1.478e-08
15-150 7.530e-08 3.952e-08
Plot creation:
Sat Oct 29 18:59:09 EDT 2011