batgrbproduct Analysis for Trigger=566228
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): Wed Aug 14 01:44:49 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger566228/batgroup_hand_proc
======================================================================
Trigger: 00566228 Segment: 000
BAT Trigger Time: 398038983.488 [s; MET]
Trigger Stop: 398038983.744 [s; MET]
UTC: 2013-08-12T22:22:52.584320 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 92.4021902978214 Dec: -13.2953627403695 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.67
Image Trigger?: NO
Rate S/N Ratio: 26.0959767013998 [ if not an image trigger ]
Image S/N Ratio: 11.67
Flight Position: [ source = BAT ]
RA: 92.4021902978214 Dec: -13.2953627403695 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 92.3869100440231 Dec: -13.2842337642911 [deg; J2000]
{ 06h 09m 32.9s , -13d 17' 03.2" }
+/- 0.970282236126412 [arcmin] (estimated 90% radius based on SNR)
+/- 0.40014992036131 [arcmin] (formal 1-sigma fit error)
SNR: 31.7567030427962
Angular difference between Flight and Ground position is 1.114454 arcmin
Partial Coding Fraction: 0.7578125 [ including projection effects ]
Duration
T90: 7.62399995326996 +/- 0.532781386325794
Measured from: -0.0239999890327454
to: 7.59999996423721 [s; relative to TRIGTIME]
T50: 5.6159999370575 +/- 0.234912720392577
Measured from: 0.748000025749207
to: 6.3639999628067 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.139999985694885
to: 0.860000014305115 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.331999957561493
to: 8.47600001096725 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.561347 0.502695 0.140848 0.019445
0.020767 0.020031 0.016415 0.013403 [error]
Peak 0.140360 0.114257 0.038166 0.005079
0.008229 0.007762 0.005976 0.004550 [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 1.97e-07 1.97e-07 1.38e-07 1.53e-07 5.94e-07 6.86e-07 erg/cm2
Error 1.48e-08 1.07e-08 1.46e-08 3.12e-08 3.44e-08 5.04e-08 erg/cm2
Peak flux Power-law 1.57e+00 8.60e-01 2.95e-01 1.32e-01 2.80e+00 2.86e+00 ph/cm2/s
Error 1.64e-01 6.99e-02 4.62e-02 3.76e-02 2.20e-01 2.23e-01 ph/cm2/s
Fluence Cutoff-PL 1.75e-07 2.22e-07 1.17e-07 2.16e-08 5.32e-07 5.36e-07 erg/cm2
Error 1.74e-08 1.45e-08 1.93e-08 1.74e-08 3.79e-08 4.20e-08 erg/cm2
Peak flux Cutoff-PL 1.49e+00 9.40e-01 2.62e-01 2.72e+00 2.72e+00 0.00e+00 ph/cm2/s
Error 1.80e-01 9.45e-02 6.30e-02 2.28e-01 2.32e-01 0.00e+00 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 1.45e+00 9.51e-01 2.74e+00 0.00e+00 0.00e+00 0.00e+00 ph/cm2/s
Error 1.92e-01 2.35e-01 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 2.513 0.113 - - 6.72e-03 5.12e-04 83.200 57
CPL 1.143 0.610 24.0 8.0 4.39e-02 0.00e+00 63.410 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.543 0.163 - - 1.39e-02 1.65e-03 53.110 57
CPL 1.637 0.635 14.5 0.0 5.12e-02 0.00e+00 48.130 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: 7.872000 sec.
T50 in the 50-300 keV band: 5.888000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 8.808 -0.332 8.476
T90 7.624 -0.024 7.600
T50 5.616 0.748 6.364
Peak 1.000 -0.140 0.860
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
92.3869 -13.2842 0.0060 29.4 9.3 1.2372 31.8 TRIG_00566228
------------------------------------------
Foreground time interval of the image:
-0.332 8.476 (delta_t = 8.808 [sec])
Background time interval of the image:
-114.187 -0.332 (delta_t = 113.855 [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 -0.332 sec. to 8.476 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.51300 ( -0.110635 0.11487 )
Norm@50keV : 6.71708E-03 ( -0.000513972 0.000509914 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 83.20 using 59 PHA bins.
# Reduced chi-squared = 1.460 for 57 degrees of freedom
# Null hypothesis probability = 1.338732e-02
Photon flux (15-150 keV) in 8.808 sec: 1.33012 ( -0.0726205 0.0727859 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.93709e-07 ( -3.42964e-08 3.45849e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.332 sec. to 8.476 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.14341 ( -0.649002 0.571709 )
Epeak [keV] : 24.0481 ( -10.6528 5.32299 )
Norm@50keV : 4.39448E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.41 using 59 PHA bins.
# Reduced chi-squared = 1.132 for 56 degrees of freedom
# Null hypothesis probability = 2.315131e-01
Photon flux (15-150 keV) in 8.808 sec: 1.24389 ( -0.07886 0.07938 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.32164e-07 ( -3.69425e-08 3.88213e-08 ) ergs/cm2
Band function
Time interval is from -0.332 sec. to 8.476 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.14332 ( -0.384541 0.205827 )
beta : -10.00000 ( 10 2.58138e-06 )
Epeak [keV] : 24.0431 ( -2.51133 5.32281 )
Norm@50keV : 4.39490E-02 ( -0.00229508 0.0639974 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.41 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 55 degrees of freedom
# Null hypothesis probability = 2.040688e-01
Photon flux (15-150 keV) in 8.808 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] : 8.25060 (-0.477263 0.502429)
R^2/D10^2 : 1.20208 (-0.264503 0.343322)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 97.95 using 59 PHA bins.
# Reduced chi-squared = 1.719 for 57 degrees of freedom
# Null hypothesis probability = 6.057259e-04
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.332e-07 1.132e-08
25- 50 2.458e-07 1.440e-08
50-150 7.137e-08 1.174e-08
15-150 4.504e-07 2.634e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 34.2915 (-3.96934 4.65994)
Norm : 9.36426 (-1.03786 1.19299)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 63.75 using 59 PHA bins.
# Reduced chi-squared = 1.118 for 57 degrees of freedom
# Null hypothesis probability = 2.511685e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.787e-07 1.330e-08
25- 50 2.189e-07 1.176e-08
50-150 1.419e-07 2.334e-08
15-150 5.394e-07 3.017e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.17914 (-0.940432 1.12469)
R1^2/D10^2 : 12.0380 (-7.26094 30.4502)
kT2 [keV] : 11.1969 (-1.38474 2.18854)
R2^2/D10^2 : 0.255890 (-0.15518 0.142358)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.58 using 59 PHA bins.
# Reduced chi-squared = 1.138 for 55 degrees of freedom
# Null hypothesis probability = 2.251038e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.780e-07 6.886e-08
25- 50 2.198e-07 6.646e-08
50-150 1.237e-07 4.026e-08
15-150 5.216e-07 1.779e-07
Peak spectrum fit
Power-law model
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.54268 ( -0.158598 0.167621 )
Norm@50keV : 1.38744E-02 ( -0.00165376 0.00163698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.11 using 59 PHA bins.
# Reduced chi-squared = 0.9317 for 57 degrees of freedom
# Null hypothesis probability = 6.219184e-01
Photon flux (15-150 keV) in 1 sec: 2.79842 ( -0.219898 0.220052 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.40391e-07 ( -1.23869e-08 1.25601e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.63725 ( -0.914303 0.355587 )
Epeak [keV] : 14.5210 ( )
Norm@50keV : 5.11732E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.13 using 59 PHA bins.
# Reduced chi-squared = 0.8594 for 56 degrees of freedom
# Null hypothesis probability = 7.636149e-01
Photon flux (15-150 keV) in 1 sec: 2.71861 ( -0.22745 0.22771 ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.140 sec. to 0.860 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.682948 ( -0.40927 0.154122 )
beta : -2.93024 ( 4.20905 14.209 )
Epeak [keV] : 23.1363 ( -8.59122 4.54211 )
Norm@50keV : 2.71264 ( -2.74992 2749.57 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.12 using 59 PHA bins.
# Reduced chi-squared = 0.8203 for 55 degrees of freedom
# Null hypothesis probability = 8.266095e-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] : 7.11031 (-0.597487 0.660386)
R^2/D10^2 : 4.83005 (-1.53564 2.24299)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.88 using 59 PHA bins.
# Reduced chi-squared = 1.191 for 57 degrees of freedom
# Null hypothesis probability = 1.533783e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.986e-08 4.860e-09
25- 50 5.626e-08 6.125e-09
50-150 9.862e-09 2.794e-09
15-150 1.060e-07 9.845e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.3106 (-5.24212 6.62239)
Norm : 21.5015 (-3.51932 4.37773)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 48.38 using 59 PHA bins.
# Reduced chi-squared = 0.8487 for 57 degrees of freedom
# Null hypothesis probability = 7.849215e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.470e-08 4.730e-09
25- 50 5.227e-08 4.520e-09
50-150 3.026e-08 7.590e-09
15-150 1.272e-07 1.165e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 5.41547 (-0.845618 0.830601)
R1^2/D10^2 : 12.5571 (-5.35496 11.6432)
kT2 [keV] : 16.9127 (-4.46839 7.71981)
R2^2/D10^2 : 6.68272E-02 (-0.053155 0.113151)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 43.95 using 59 PHA bins.
# Reduced chi-squared = 0.7990 for 55 degrees of freedom
# Null hypothesis probability = 8.575390e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.549e-08 1.186e-08
25- 50 5.008e-08 1.288e-08
50-150 3.697e-08 2.013e-08
15-150 1.325e-07 4.122e-08
Plot creation:
Wed Aug 14 02:30:21 EDT 2013