batgrbproduct Analysis for Trigger=506074
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 Oct 23 12:42:28 EDT 2011
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger506074/GCN5_download_cron
======================================================================
Trigger: 00506074 Segment: 000
BAT Trigger Time: 340996392 [s; MET]
Trigger Stop: 340996456 [s; MET]
UTC: 2011-10-22T17:13:04.505940 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 108.951202257144 Dec: 49.6663689387038 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.16
Flight Position: [ source = BAT ]
RA: 108.951202257144 Dec: 49.6663689387038 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 108.926626014243 Dec: 49.6627467406652 [deg; J2000]
{ 07h 15m 42.4s , +49d 39' 45.9" }
+/- 2.02880731008526 [arcmin] (estimated 90% radius based on SNR)
+/- 1.10464025490107 [arcmin] (formal 1-sigma fit error)
SNR: 11.0714104065141
Angular difference between Flight and Ground position is 0.978867 arcmin
Partial Coding Fraction: 0.8203125 [ including projection effects ]
Duration
T90: 79.0879999399185 +/- 13.5357324017712
Measured from: -28.8439998626709
to: 50.2440000772476 [s; relative to TRIGTIME]
T50: 49.3519999980927 +/- 15.3461880506009
Measured from: -20.3959999084473
to: 28.9560000896454 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 49.5360000133514
to: 50.5360000133514 [s; relative to TRIGTIME]
Total Fluence
Measured from: -47.8439999818802
to: 53.8000000119209 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.443848 0.586314 0.372014 0.050209
0.058103 0.059837 0.052778 0.045813 [error]
Peak 0.016901 0.012021 0.013264 0.008245
0.005861 0.005838 0.005461 0.004577 [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 1.34e-07 2.32e-07 3.08e-07 8.34e-07 8.98e-07 1.51e-06 erg/cm2
Error 2.51e-08 2.77e-08 5.07e-08 2.87e-07 1.22e-07 3.31e-07 erg/cm2
Peak flux Power-law 9.07e-02 1.17e-01 1.10e-01 1.82e-01 3.78e-01 4.99e-01 ph/cm2/s
Error 9.33e-02 6.29e-02 4.63e-02 2.50e-01 2.61e-01 2.18e-01 ph/cm2/s
Fluence Cutoff-PL 1.31e-07 2.39e-07 3.09e-07 5.55e-07 8.77e-07 1.23e-06 erg/cm2
Error 2.69e-08 3.51e-08 5.31e-08 5.63e-07 1.40e-07 5.15e-07 erg/cm2
Peak flux Cutoff-PL 9.32e-02 1.18e-01 1.10e-01 1.77e-01 3.80e-01 4.91e-01 ph/cm2/s
Error 7.03e-02 6.31e-02 4.63e-02 2.70e-01 1.45e-01 1.54e-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 1.592 0.204 - - 9.45e-04 1.18e-04 74.480 57
CPL 1.371 0.805 127.9 0.0 1.25e-03 1.45e-03 74.200 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.091 1.002 - - 3.27e-03 1.30e-03 57.870 57
CPL 1.088 1.015 10000.0 0.0 3.28e-03 1.30e-03 57.880 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: 88.512000 sec.
T50 in the 50-300 keV band: 26.432000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 101.644 -47.844 53.800
T90 79.088 -28.844 50.244
T50 49.352 -20.396 28.956
Peak 1.000 49.536 50.536
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
108.9266 +49.6627 0.0173 30.7 -14.0 1.5297 11.1 TRIG_00506074
------------------------------------------
Foreground time interval of the image:
-47.844 53.800 (delta_t = 101.644 [sec])
Background time interval of the image:
-205.799 -47.844 (delta_t = 157.955 [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 -47.844 sec. to 53.800 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.59236 ( -0.202763 0.20517 )
Norm@50keV : 9.44561E-04 ( -0.000118415 0.000117043 )
------------------------------------------------------------
# Chi-Squared = 74.48 using 59 PHA bins.
# Reduced chi-squared = 1.307 for 57 degrees of freedom
# Null hypothesis probability = 5.993549e-02
Photon flux (15-150 keV) in 101.6 sec: 0.121095 ( -0.014326 0.0143387 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.98344e-07 ( -1.20603e-07 1.22457e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -47.844 sec. to 53.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.37086 ( -0.853308 0.757436 )
Epeak [keV] : 127.915 ( -128.527 -128.527 )
Norm@50keV : 1.25358E-03 ( -0.000416751 0.00247661 )
------------------------------------------------------------
# Chi-Squared = 74.20 using 59 PHA bins.
# Reduced chi-squared = 1.325 for 56 degrees of freedom
# Null hypothesis probability = 5.216632e-02
Photon flux (15-150 keV) in 101.6 sec: 0.120123 ( -0.014665 0.014525 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.7731e-07 ( -1.42713e-07 1.3733e-07 ) ergs/cm2
Band function
Time interval is from -47.844 sec. to 53.800 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.99569 ( -455.542 -445.542 )
beta : -1.86768 ( -0.356571 0.276713 )
Epeak [keV] : 27.5087 ( -5.99242 5.18616 )
Norm@50keV : 64.2929 ( -64.2952 225.764 )
------------------------------------------------------------
# Chi-Squared = 68.06 using 59 PHA bins.
# Reduced chi-squared = 1.238 for 55 degrees of freedom
# Null hypothesis probability = 1.110133e-01
Photon flux (15-150 keV) in 101.6 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] : 11.3436 (-1.64357 2.09519)
R^2/D10^2 : 3.62522E-02 (-0.0167672 0.0284974)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 91.05 using 59 PHA bins.
# Reduced chi-squared = 1.597 for 57 degrees of freedom
# Null hypothesis probability = 2.786351e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.957e-08 1.981e-08
25- 50 2.927e-07 4.714e-08
50-150 2.177e-07 6.589e-08
15-150 6.100e-07 1.044e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 162.651 ( )
Norm : 0.499253 (-0.0634677 0.075376)
------------------------------------------------------------
# Chi-Squared = 74.14 using 59 PHA bins.
# Reduced chi-squared = 1.301 for 57 degrees of freedom
# Null hypothesis probability = 6.312025e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.245e-07 6.650e-08
25- 50 2.392e-07 1.285e-07
50-150 5.231e-07 2.834e-07
15-150 8.868e-07 4.767e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.91165 (-1.42634 1.6132)
R1^2/D10^2 : 0.110388 (-0.0532401 0.101503)
kT2 [keV] : 43.2721 (-17.3886 118.87)
R2^2/D10^2 : 2.82247E-04 (-0.000261154 0.000646929)
------------------------------------------------------------
# Chi-Squared = 66.24 using 59 PHA bins.
# Reduced chi-squared = 1.204 for 55 degrees of freedom
# Null hypothesis probability = 1.426031e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.324e-07 5.238e-08
25- 50 2.617e-07 1.057e-07
50-150 5.333e-07 2.872e-07
15-150 9.275e-07 3.745e-07
Peak spectrum fit
Power-law model
Time interval is from 49.536 sec. to 50.536 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.09090 ( -1.13679 0.866881 )
Norm@50keV : 3.26748E-03 ( -0.00144796 0.00115503 )
------------------------------------------------------------
# Chi-Squared = 57.87 using 59 PHA bins.
# Reduced chi-squared = 1.015 for 57 degrees of freedom
# Null hypothesis probability = 4.431206e-01
Photon flux (15-150 keV) in 1 sec: 0.378428 ( -0.378428 0.144229 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.4291e-08 ( -1.3717e-08 1.37145e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 49.536 sec. to 50.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.08807 ( -1.22105 0.809185 )
Epeak [keV] : 10000.00 ( )
Norm@50keV : 3.28478E-03 ( -0.00144304 0.00115904 )
------------------------------------------------------------
# Chi-Squared = 57.88 using 59 PHA bins.
# Reduced chi-squared = 1.034 for 56 degrees of freedom
# Null hypothesis probability = 4.056494e-01
Photon flux (15-150 keV) in 1 sec: 0.380151 ( -0.148449 0.142111 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.36938e-08 ( -1.31786e-08 1.41822e-08 ) ergs/cm2
Band function
Time interval is from 49.536 sec. to 50.536 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.947930 ( 0.94709 0.94709 )
beta : -1.09268 ( 1.08841 1.13793 )
Epeak [keV] : 31.8462 ( -31.4264 -31.4264 )
Norm@50keV : 5.37325E-03 ( -0.00321038 0.595784 )
------------------------------------------------------------
# Chi-Squared = 57.87 using 59 PHA bins.
# Reduced chi-squared = 1.052 for 55 degrees of freedom
# Null hypothesis probability = 3.699606e-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] : 55.3572 (-39.5701 -56.2622)
R^2/D10^2 : 1.03062E-03 (-0.000977258 0.026461)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared = 62.30 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 57 degrees of freedom
# Null hypothesis probability = 2.934346e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.181e-10 2.041e-10
25- 50 2.350e-09 1.453e-09
50-150 3.156e-08 1.944e-08
15-150 3.423e-08 2.036e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.362 (-199.944 -199.944)
Norm : 1.57387 (-0.571234 0.57122)
------------------------------------------------------------
# Chi-Squared = 59.58 using 59 PHA bins.
# Reduced chi-squared = 1.045 for 57 degrees of freedom
# Null hypothesis probability = 3.819833e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.919e-09 2.356e-09
25- 50 7.539e-09 4.530e-09
50-150 1.653e-08 1.017e-08
15-150 2.799e-08 1.742e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.78421 (-3.12293 5.19479)
R1^2/D10^2 : 1.08180 (-1.02187 46.8224)
kT2 [keV] : 199.350 (-199.981 -199.981)
R2^2/D10^2 : 1.09231E-04 (-4.68225e-05 0.00285822)
------------------------------------------------------------
# Chi-Squared = 53.82 using 59 PHA bins.
# Reduced chi-squared = 0.9786 for 55 degrees of freedom
# Null hypothesis probability = 5.196165e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.694e-09 3.002e-09
25- 50 5.377e-09 3.125e-09
50-150 2.925e-08 5.490e-09
15-150 3.932e-08 8.930e-09
Plot creation:
Sun Oct 23 13:01:57 EDT 2011