batgrbproduct Analysis for Trigger=559139
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 Jun 28 13:52:25 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger559139/batgroup_hand_proc
======================================================================
Trigger: 00559139 Segment: 000
BAT Trigger Time: 394027261.376 [s; MET]
Trigger Stop: 394027263.424 [s; MET]
UTC: 2013-06-27T12:00:50.652640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 181.932229853194 Dec: -55.7299343575035 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.71
Image Trigger?: NO
Rate S/N Ratio: 9.8488578017961 [ if not an image trigger ]
Image S/N Ratio: 9.71
Flight Position: [ source = BAT ]
RA: 181.932229853194 Dec: -55.7299343575035 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 181.913552897186 Dec: -55.7056344951795 [deg; J2000]
{ 12h 07m 39.3s , -55d 42' 20.3" }
+/- 1.77512421783365 [arcmin] (estimated 90% radius based on SNR)
+/- 0.767263503753354 [arcmin] (formal 1-sigma fit error)
SNR: 13.3991518796843
Angular difference between Flight and Ground position is 1.588762 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 28.5600000619888 +/- 5.8497234231774
Measured from: -6.40799999237061
to: 22.1520000696182 [s; relative to TRIGTIME]
T50: 10.6400000452995 +/- 3.58060550823077
Measured from: -0.407999992370605
to: 10.2320000529289 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.81999999284744
to: 2.81999999284744 [s; relative to TRIGTIME]
Total Fluence
Measured from: -10.472000002861
to: 25.9919999837875 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.352676 0.607532 0.250451 0.058788
0.037785 0.038218 0.034289 0.031881 [error]
Peak 0.029014 0.042600 0.029401 -0.005666
0.006536 0.006687 0.005985 0.005504 [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 1.30e-07 2.01e-07 2.33e-07 5.19e-07 7.17e-07 1.08e-06 erg/cm2
Error 1.68e-08 1.76e-08 3.24e-08 1.45e-07 7.59e-08 1.78e-07 erg/cm2
Peak flux Power-law 3.26e-01 2.84e-01 1.69e-01 1.52e-01 8.44e-01 9.31e-01 ph/cm2/s
Error 8.46e-02 5.20e-02 4.67e-02 7.96e-02 1.55e-01 1.77e-01 ph/cm2/s
Fluence Cutoff-PL 1.10e-07 2.39e-07 2.14e-07 5.95e-08 6.11e-07 6.22e-07 erg/cm2
Error 2.02e-08 2.68e-08 4.35e-08 7.32e-08 8.34e-08 1.09e-07 erg/cm2
Peak flux Cutoff-PL 2.75e-01 3.39e-01 1.70e-01 2.88e-02 8.08e-01 8.12e-01 ph/cm2/s
Error 9.98e-02 7.31e-02 5.85e-02 6.13e-02 1.56e-01 1.63e-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 8.12e-01 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 1.786 0.157 - - 2.13e-03 2.19e-04 68.340 57
CPL 0.126 1.029 47.6 8.7 1.86e-02 4.27e-02 56.720 56
The chi2 of BB fit is Chi-Squared Chi-Squared which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.746 0.311 - - 6.25e-03 1.34e-03 66.370 57
CPL 0.151 1.704 49.9 33.0 4.96e-02 3.28e-01 62.510 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: 8.960000 sec.
T50 in the 50-300 keV band: 4.672000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 36.464 -10.472 25.992
T90 28.560 -6.408 22.152
T50 10.640 -0.408 10.232
Peak 1.000 1.820 2.820
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
181.9136 -55.7056 0.0144 18.7118 164.5362 1.2688287 13.399 TRIG_00559139
Foreground time interval of the image:
-10.472 25.992 (delta_t = 36.464 [sec])
Background time interval of the image:
-60.376 -10.472 (delta_t = 49.904 [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 -10.472 sec. to 25.992 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.78620 ( -0.154238 0.15979 )
Norm@50keV : 2.13378E-03 ( -0.000220162 0.000217168 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.34 using 59 PHA bins.
# Reduced chi-squared = 1.199 for 57 degrees of freedom
# Null hypothesis probability = 1.444190e-01
Photon flux (15-150 keV) in 36.46 sec: 0.292471 ( -0.025757 0.025763 ) ph/cm2/s
Energy fluence (15-150 keV) : 7.16603e-07 ( -7.51539e-08 7.65511e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -10.472 sec. to 25.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.126423 ( -1.15465 0.903999 )
Epeak [keV] : 47.5732 ( -6.15624 11.2107 )
Norm@50keV : 1.85732E-02 ( -0.0186567 0.0667076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.72 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.478193e-01
Photon flux (15-150 keV) in 36.46 sec: 0.273117 ( -0.027295 0.027409 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.10705e-07 ( -7.92385e-08 8.74748e-08 ) ergs/cm2
Band function
Time interval is from -10.472 sec. to 25.992 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.343096 ( -1.13408 1.9815 )
beta : -2.73183 ( 2.73584 0.584673 )
Epeak [keV] : 43.6462 ( -7.45748 10.0531 )
Norm@50keV : 3.72922E-02 ( -0.040508 0.351186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.30 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 55 degrees of freedom
# Null hypothesis probability = 4.634470e-01
Photon flux (15-150 keV) in 36.46 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] : 11.1852 (-0.980543 1.0903)
R^2/D10^2 : 9.42993E-02 (-0.0276684 0.0383868)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.94 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.044473e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.016e-08 1.358e-08
25- 50 2.604e-07 2.523e-08
50-150 1.864e-07 4.249e-08
15-150 5.369e-07 6.089e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 91.7222 (-24.224 41.3807)
Norm : 1.33046 (-0.15654 0.183565)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.54 using 59 PHA bins.
# Reduced chi-squared = 1.080 for 57 degrees of freedom
# Null hypothesis probability = 3.169057e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.266e-07 1.730e-08
25- 50 2.151e-07 2.117e-08
50-150 3.313e-07 1.453e-07
15-150 6.730e-07 1.542e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 9.36124 ( )
R1^2/D10^2 : 0.151212 (-0.0622471 -0.150174)
kT2 [keV] : 29.1210 (-30.1107 -30.1116)
R2^2/D10^2 : 1.08835E-03 (-0.000810241 0.108476)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.93 using 59 PHA bins.
#Fit statistic : Chi-Squared = 55.82 using 59 PHA bins.
# Reduced chi-squared = 1.035 for 55 degrees of freedom
# Reduced chi-squared = 1.015 for 55 degrees of freedom
# Null hypothesis probability = 4.032167e-01
# Null hypothesis probability = 4.438448e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.035e-07 2.353e-08
25- 50 2.488e-07 3.571e-08
50-150 2.048e-07 4.949e-08
15-150 5.571e-07 7.748e-08
Peak spectrum fit
Power-law model
Time interval is from 1.820 sec. to 2.820 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.74585 ( -0.300454 0.322306 )
Norm@50keV : 6.25148E-03 ( -0.00135955 0.00132526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.37 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.852234e-01
Photon flux (15-150 keV) in 1 sec: 0.844016 ( -0.154753 0.154754 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.77031e-08 ( -1.26659e-08 1.31505e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.820 sec. to 2.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.151155 ( -2.00028 1.40855 )
Epeak [keV] : 49.9429 ( -12.0758 53.8739 )
Norm@50keV : 4.96336E-02 ( -0.0496535 0.605752 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.51 using 59 PHA bins.
# Reduced chi-squared = 1.116 for 56 degrees of freedom
# Null hypothesis probability = 2.562194e-01
Photon flux (15-150 keV) in 1 sec: 0.807949 ( -0.15598 0.156877 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.08258e-08 ( -1.20155e-08 1.38188e-08 ) ergs/cm2
Band function
Time interval is from 1.820 sec. to 2.820 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.169391 ( -0.848014 5.27526 )
beta : -10.0000 ( 10 5.32907e-15 )
Epeak [keV] : 49.8858 ( -12.0711 53.9732 )
Norm@50keV : 4.87136E-02 ( -0.0486653 0.608585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.51 using 59 PHA bins.
# Reduced chi-squared = 1.137 for 55 degrees of freedom
# Null hypothesis probability = 2.270471e-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] : 11.8518 (-2.14678 2.5871)
R^2/D10^2 : 0.227603 (-0.117371 0.24129)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.49 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 57 degrees of freedom
# Null hypothesis probability = 2.313347e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.754e-09 2.213e-09
25- 50 2.095e-08 6.110e-09
50-150 1.754e-08 7.670e-09
15-150 4.524e-08 1.377e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 97.7930 (-43.8438 -97.792)
Norm : 3.81328 (-0.787259 1.08612)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.19 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 57 degrees of freedom
# Null hypothesis probability = 2.391824e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.966e-09 2.855e-09
25- 50 1.715e-08 6.612e-09
50-150 2.745e-08 1.994e-08
15-150 5.457e-08 2.930e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.79362 (-4.75564 -4.75564)
R1^2/D10^2 : 2.35485 (-2.36273 -2.36273)
kT2 [keV] : 14.4617 (-4.5315 -14.4354)
R2^2/D10^2 : 9.36746E-02 (-0.0939061 0.220182)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.04 using 59 PHA bins.
# Reduced chi-squared = 1.128 for 55 degrees of freedom
# Null hypothesis probability = 2.397430e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.947e-09 4.833e-09
25- 50 1.867e-08 1.039e-08
50-150 2.225e-08 1.359e-08
15-150 4.986e-08 2.655e-08
Plot creation:
Fri Jun 28 14:02:54 EDT 2013