batgrbproduct Analysis for Trigger=506913
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): Fri Nov 4 06:30:37 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger506913/GCN5_download_cron
======================================================================
Trigger: 00506913 Segment: 000
BAT Trigger Time: 342022340.672 [s; MET]
Trigger Stop: 342022357.056 [s; MET]
UTC: 2011-11-03T14:12:13.137260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 290.667343880893 Dec: -17.2842407590617 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.2
Image Trigger?: NO
Rate S/N Ratio: 12.2882057274445 [ if not an image trigger ]
Image S/N Ratio: 8.2
Flight Position: [ source = BAT ]
RA: 290.667343880893 Dec: -17.2842407590617 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 290.670028125354 Dec: -17.2732036319686 [deg; J2000]
{ 19h 22m 40.8s , -17d 16' 23.5" }
+/- 2.56606224739565 [arcmin] (estimated 90% radius based on SNR)
+/- 1.08423294167276 [arcmin] (formal 1-sigma fit error)
SNR: 7.91500091889362
Angular difference between Flight and Ground position is 0.679850 arcmin
Partial Coding Fraction: 0.5546875 [ including projection effects ]
Duration
T90: 19.6039999723434 +/- 5.36772769197403
Measured from: 0.504000127315521
to: 20.108000099659 [s; relative to TRIGTIME]
T50: 12.7079999446869 +/- 8.07519263572533
Measured from: 4.50000011920929
to: 17.2080000638962 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.48800003528595
to: 2.48800003528595 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.79199999570847
to: 25.9959999918938 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.622786 0.042005 0.027922 0.017896
0.046501 0.041295 0.035729 0.033314 [error]
Peak 0.064722 0.010301 -0.004178 0.003794
0.009340 0.008094 0.006552 0.006081 [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 2.01e-07 3.25e-08 2.46e-09 1.99e-10 2.36e-07 2.36e-07 erg/cm2
Error 3.22e-08 1.66e-08 3.39e-09 5.08e-10 4.29e-08 4.29e-08 erg/cm2
Peak flux Power-law 7.26e-01 9.88e-02 5.97e-03 3.82e-04 8.31e-01 8.31e-01 ph/cm2/s
Error 1.77e-01 6.94e-02 1.11e-02 1.58e-03 2.19e-01 2.20e-01 ph/cm2/s
Fluence Cutoff-PL 2.16e-07 1.11e-08 2.58e-13 2.03e-24 2.27e-07 2.27e-07 erg/cm2
Error 3.56e-08 2.08e-08 7.04e-10 0.00e+00 3.71e-08 3.71e-08 erg/cm2
Peak flux Cutoff-PL 7.49e-01 7.13e-02 3.19e-04 1.57e-08 8.28e-01 8.29e-01 ph/cm2/s
Error 2.07e-01 8.76e-02 1.07e-02 3.63e-04 2.15e-01 2.16e-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 5.726 0.886 - - 8.90e-05 8.64e-05 64.480 57
CPL 1.000 0.000 50.0 0.0 2.81e-03 0.00e+00 140.390 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 5.048 1.278 - - 5.15e-04 7.59e-04 61.730 57
CPL 1.000 0.000 50.0 0.0 9.73e-03 0.00e+00 94.070 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 27.788 -1.792 25.996
T90 19.604 0.504 20.108
T50 12.708 4.500 17.208
Peak 1.000 1.488 2.488
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
290.6700 -17.2732 0.0243 31.1 150.0 0.6651 7.9 TRIG_00506913
------------------------------------------
Foreground time interval of the image:
-1.792 25.996 (delta_t = 27.788 [sec])
Background time interval of the image:
-239.672 -1.792 (delta_t = 237.880 [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 -1.792 sec. to 25.996 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.72606 ( -0.826735 0.944685 )
Norm@50keV : 8.90017E-05 ( -5.71797e-05 0.00011564 )
------------------------------------------------------------
# Chi-Squared = 64.48 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 57 degrees of freedom
# Null hypothesis probability = 2.315381e-01
Photon flux (15-150 keV) in 27.79 sec: 0.278622 ( -0.0457525 0.045802 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.35955e-07 ( -4.22452e-08 4.34763e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.792 sec. to 25.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 2.80777E-03 ( )
------------------------------------------------------------
# Chi-Squared = 140.39 using 59 PHA bins.
# Reduced chi-squared = 2.5070 for 56 degrees of freedom
# Null hypothesis probability = 3.407285e-09
Photon flux (15-150 keV) in 27.79 sec: 0.278304 ( -0.045714 0.045759 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.27217e-07 ( -3.67887e-08 3.73267e-08 ) ergs/cm2
Band function
Time interval is from -1.792 sec. to 25.996 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14983 ( 1.78105 1.78105 )
beta : -9.65523 ( 14.1964 24.1938 )
Epeak [keV] : 3.55216 ( -0.727963 0.937319 )
Norm@50keV : 0.770005 ( -0.770007 1331.79 )
------------------------------------------------------------
# Chi-Squared = 63.10 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 55 degrees of freedom
# Null hypothesis probability = 2.117407e-01
Photon flux (15-150 keV) in 27.79 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] : 2.46900 (-0.347211 0.404883)
R^2/D10^2 : 153.324 (-153.324 338.853)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.66 using 59 PHA bins.
# Reduced chi-squared = 1.099 for 57 degrees of freedom
# Null hypothesis probability = 2.824962e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.134e-07 1.159e-07
25- 50 1.491e-08 9.349e-09
50-150 4.165e-12 4.808e-12
15-150 2.283e-07 1.254e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 4.44351 (-0.936784 1.25618)
Norm : 101.200 (-60.5718 179.935)
------------------------------------------------------------
# Chi-Squared = 63.19 using 59 PHA bins.
# Reduced chi-squared = 1.109 for 57 degrees of freedom
# Null hypothesis probability = 2.671288e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.094e-07 1.067e-07
25- 50 2.001e-08 1.251e-08
50-150 5.522e-11 6.093e-11
15-150 2.295e-07 1.269e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 2.45840 (-0.400836 0.361093)
R1^2/D10^2 : 157.769 (-88.0185 383.632)
kT2 [keV] : 200.000 ( )
R2^2/D10^2 : 8.81789E-06 (-8.81789e-06 1.17456e-05)
------------------------------------------------------------
# Chi-Squared = 61.19 using 59 PHA bins.
# Chi-Squared = 61.13 using 59 PHA bins.
# Reduced chi-squared = 1.113 for 55 degrees of freedom
# Reduced chi-squared = 1.112 for 55 degrees of freedom
# Null hypothesis probability = 2.636047e-01
# Null hypothesis probability = 2.651662e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.126e-07 1.167e-07
25- 50 1.815e-08 9.059e-09
50-150 5.900e-08 6.369e-12
15-150 2.898e-07 1.261e-07
Peak spectrum fit
Power-law model
Time interval is from 1.488 sec. to 2.488 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 5.04776 ( -1.09352 1.46183 )
Norm@50keV : 5.14765E-04 ( -0.000514765 0.00100262 )
------------------------------------------------------------
# Chi-Squared = 61.73 using 59 PHA bins.
# Reduced chi-squared = 1.083 for 57 degrees of freedom
# Null hypothesis probability = 3.108662e-01
Photon flux (15-150 keV) in 1 sec: 0.831396 ( -0.219037 0.219921 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.6512e-08 ( -7.98284e-09 8.78007e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.488 sec. to 2.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.00000 ( )
Epeak [keV] : 50.0000 ( )
Norm@50keV : 9.73056E-03 ( )
------------------------------------------------------------
# Chi-Squared = 94.07 using 59 PHA bins.
# Reduced chi-squared = 1.680 for 56 degrees of freedom
# Null hypothesis probability = 1.091480e-03
Photon flux (15-150 keV) in 1 sec: 0.828377 ( -0.215641 0.215283 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.56645e-08 ( -7.6169e-09 9.3899e-09 ) ergs/cm2
Band function
Time interval is from 1.488 sec. to 2.488 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.928378 ( -0.912863 -0.912863 )
beta : -6.47853 ( 5.49918 1.49312 )
Epeak [keV] : 9.39915 ( -9.32589 3.55984 )
Norm@50keV : 70.1231 ( -62.1049 168882 )
------------------------------------------------------------
# Chi-Squared = 61.48 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Null hypothesis probability = 2.553561e-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] : 2.72441 (-0.617123 0.78762)
R^2/D10^2 : 224.067 (-224.067 1174.99)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 61.64 using 59 PHA bins.
# Reduced chi-squared = 1.081 for 57 degrees of freedom
# Null hypothesis probability = 3.135742e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.244e-08 1.286e-08
25- 50 2.307e-09 1.486e-09
50-150 1.632e-12 1.961e-12
15-150 2.475e-08 1.439e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 5.36036 (-1.80656 3.10886)
Norm : 149.971 (-149.971 556.024)
------------------------------------------------------------
# Chi-Squared = 61.58 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.156583e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.193e-08 1.232e-08
25- 50 3.231e-09 2.163e-09
50-150 2.353e-11 2.733e-11
15-150 2.519e-08 1.437e-08
Double BB
R1^2/D10^2 : 254.697 ( )
kT2 [keV] : 10.2325 (-200 -200)
R2^2/D10^2 : 1.97802E-02 ( )
------------------------------------------------------------
# Chi-Squared = 61.54 using 59 PHA bins.
# Chi-Squared = 61.47 using 59 PHA bins.
# Chi-Squared = 61.39 using 59 PHA bins.
# Reduced chi-squared = 1.119 for 55 degrees of freedom
# Reduced chi-squared = 1.118 for 55 degrees of freedom
# Reduced chi-squared = 1.116 for 55 degrees of freedom
# Null hypothesis probability = 2.534644e-01
# Null hypothesis probability = 2.556412e-01
# Null hypothesis probability = 2.577617e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.241e-08 1.265e-08
25- 50 2.368e-09 1.530e-09
50-150 1.393e-09 2.122e-12
15-150 2.618e-08 1.407e-08
Plot creation:
Fri Nov 4 06:52:41 EDT 2011