batgrbproduct Analysis for Trigger=568849
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 Sep 1 11:06:27 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger568849/GCN5_download_cron
======================================================================
Trigger: 00568849 Segment: 000
BAT Trigger Time: 399647067.52 [s; MET]
Trigger Stop: 399647068.032 [s; MET]
UTC: 2013-08-31T13:04:16.543620 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 358.64872508801 Dec: 29.4481629872927 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.54
Image Trigger?: NO
Rate S/N Ratio: 19.3907194296653 [ if not an image trigger ]
Image S/N Ratio: 10.54
Flight Position: [ source = BAT ]
RA: 358.64872508801 Dec: 29.4481629872927 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 358.635570661424 Dec: 29.4310291184841 [deg; J2000]
{ 23h 54m 32.5s , +29d 25' 51.7" }
+/- 0.674947444727218 [arcmin] (estimated 90% radius based on SNR)
+/- 0.214351463012176 [arcmin] (formal 1-sigma fit error)
SNR: 53.3357542065711
Angular difference between Flight and Ground position is 1.236649 arcmin
Partial Coding Fraction: 0.28125 [ including projection effects ]
Duration
T90: 32.5199999809265 +/- 1.86433148597529
Measured from: 0.620000123977661
to: 33.1400001049042 [s; relative to TRIGTIME]
T50: 8.06399995088577 +/- 0.755195368872199
Measured from: 2.42000013589859
to: 10.4840000867844 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.2960000038147
to: 3.2960000038147 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.7039999961853
to: 41.37600004673 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.503989 4.205755 2.471803 0.583395
0.068115 0.072139 0.061390 0.046028 [error]
Peak 0.404031 0.579708 0.392061 0.102341
0.016944 0.019525 0.017323 0.011175 [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 1.36e-06 1.93e-06 2.02e-06 3.91e-06 6.54e-06 9.22e-06 erg/cm2
Error 6.49e-08 5.22e-08 6.65e-08 2.88e-07 1.62e-07 3.28e-07 erg/cm2
Peak flux Power-law 5.10e+00 4.56e+00 2.80e+00 2.62e+00 1.36e+01 1.51e+01 ph/cm2/s
Error 3.72e-01 2.01e-01 1.47e-01 2.81e-01 5.90e-01 6.13e-01 ph/cm2/s
Fluence Cutoff-PL 1.34e-06 1.93e-06 2.03e-06 3.78e-06 6.55e-06 9.09e-06 erg/cm2
Error 7.81e-08 5.52e-08 6.34e-08 6.11e-07 1.91e-07 6.40e-07 erg/cm2
Peak flux Cutoff-PL 4.93e+00 4.62e+00 2.85e+00 2.20e+00 1.34e+01 1.46e+01 ph/cm2/s
Error 4.54e-01 2.24e-01 1.65e-01 5.78e-01 6.20e-01 9.03e-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 1.47e+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 1.930 0.049 - - 1.65e-02 4.12e-04 56.090 57
CPL 1.909 0.203 221.7 0.0 1.69e-02 0.00e+00 56.050 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.702 0.073 - - 1.02e-01 4.27e-03 57.050 57
CPL 1.540 0.239 147.7 0.0 1.23e-01 0.00e+00 55.950 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: 20.800000 sec.
T50 in the 50-300 keV band: 5.440000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 43.080 -1.704 41.376
T90 32.520 0.620 33.140
T50 8.064 2.420 10.484
Peak 1.000 2.296 3.296
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
358.6356 +29.4310 0.0036 41.6 28.7 7.7544 53.3 TRIG_00568849
------------------------------------------
Foreground time interval of the image:
-1.704 7.881 (delta_t = 9.585 [sec])
Background time interval of the image:
-239.520 -18.528 (delta_t = 220.992 [sec])
-17.520 -1.704 (delta_t = 15.816 [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 -1.704 sec. to 41.376 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.93021 ( -0.0484255 0.0486776 )
Norm@50keV : 1.64967E-02 ( -0.000412561 0.00041187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.09 using 59 PHA bins.
# Reduced chi-squared = 0.9840 for 57 degrees of freedom
# Null hypothesis probability = 5.093174e-01
Photon flux (15-150 keV) in 43.08 sec: 2.39840 ( -0.0700658 0.0704497 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.53674e-06 ( -1.62001e-07 1.62095e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.704 sec. to 41.376 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.90871 ( -0.187091 0.21928 )
Epeak [keV] : 221.666 ( )
Norm@50keV : 1.68914E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.05 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 56 degrees of freedom
# Null hypothesis probability = 4.730716e-01
Photon flux (15-150 keV) in 43.08 sec: 2.38113 ( -0.07424 0.08107 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.54691e-06 ( -2.16994e-07 1.64523e-07 ) ergs/cm2
Band function
Time interval is from -1.704 sec. to 41.376 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -1.16865 ( -1.22334 6.06081 )
beta : -1.97027 ( -0.0406274 0.0658372 )
Epeak [keV] : 35.4401 ( -15.0916 55.9341 )
Norm@50keV : 5.03619E-02 ( -0.0540107 2805.59 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.26 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 55 degrees of freedom
# Null hypothesis probability = 5.413676e-01
Photon flux (15-150 keV) in 43.08 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] : 13.1629 ( )
R^2/D10^2 : 0.365019 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 510.04 using 59 PHA bins.
# Reduced chi-squared = 8.9480 for 57 degrees of freedom
# Null hypothesis probability = 5.225818e-74
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.777e-07 2.736e-08
25- 50 2.016e-06 6.354e-08
50-150 2.225e-06 1.049e-07
15-150 4.819e-06 1.292e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 95.7604 (-8.29224 9.62937)
Norm : 10.2129 (-0.435207 0.460803)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 81.47 using 59 PHA bins.
# Reduced chi-squared = 1.429 for 57 degrees of freedom
# Null hypothesis probability = 1.841412e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.150e-06 6.936e-08
25- 50 1.970e-06 6.419e-08
50-150 3.114e-06 6.785e-07
15-150 6.234e-06 6.936e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.26916 (-0.497096 0.510447)
R1^2/D10^2 : 2.67318 (-0.592123 0.818466)
kT2 [keV] : 27.7640 (-2.60382 3.27481)
R2^2/D10^2 : 1.63203E-02 (-0.00542094 0.00735132)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.44 using 59 PHA bins.
# Reduced chi-squared = 1.117 for 55 degrees of freedom
# Null hypothesis probability = 2.562885e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.104e-06 7.970e-08
25- 50 2.024e-06 8.336e-08
50-150 3.245e-06 2.503e-07
15-150 6.372e-06 3.253e-07
Peak spectrum fit
Power-law model
Time interval is from 2.296 sec. to 3.296 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.70183 ( -0.0728158 0.0734859 )
Norm@50keV : 0.102107 ( -0.00427648 0.00426038 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.05 using 59 PHA bins.
# Reduced chi-squared = 1.001 for 57 degrees of freedom
# Null hypothesis probability = 4.733554e-01
Photon flux (15-150 keV) in 1 sec: 13.5697 ( -0.589587 0.590919 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.45258e-07 ( -4.10542e-08 4.11358e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.296 sec. to 3.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53951 ( -0.278879 0.199491 )
Epeak [keV] : 147.656 ( )
Norm@50keV : 0.122613 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.95 using 59 PHA bins.
# Reduced chi-squared = 0.9991 for 56 degrees of freedom
# Null hypothesis probability = 4.766776e-01
Photon flux (15-150 keV) in 1 sec: 13.4456 ( -0.6194 0.621 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.37021e-07 ( -4.3705e-08 4.3501e-08 ) ergs/cm2
Band function
Time interval is from 2.296 sec. to 3.296 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.572052 ( -0.98128 5.6826 )
beta : -1.78129 ( -0.142005 0.104924 )
Epeak [keV] : 41.0132 ( -17.1819 307.777 )
Norm@50keV : 0.543174 ( -0.553996 9310.05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.92 using 59 PHA bins.
# Reduced chi-squared = 0.9804 for 55 degrees of freedom
# Null hypothesis probability = 5.157895e-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] : 13.9489 ( )
R^2/D10^2 : 1.85587 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 228.79 using 59 PHA bins.
# Reduced chi-squared = 4.0139 for 57 degrees of freedom
# Null hypothesis probability = 1.923998e-22
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.630e-08 6.530e-09
25- 50 2.828e-07 1.440e-08
50-150 3.616e-07 2.880e-08
15-150 7.207e-07 3.365e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 143.518 ( )
Norm : 55.9222 (-3.04139 2.9522)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.26 using 59 PHA bins.
# Reduced chi-squared = 1.022 for 57 degrees of freedom
# Null hypothesis probability = 4.286247e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.418e-07 9.600e-09
25- 50 2.627e-07 1.735e-08
50-150 5.187e-07 1.402e-07
15-150 9.232e-07 1.523e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.22798 (-0.757451 0.800826)
R1^2/D10^2 : 14.4468 (-4.4364 7.05125)
kT2 [keV] : 28.0753 (-3.45018 4.71505)
R2^2/D10^2 : 0.113100 (-0.0479728 0.0709897)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 51.34 using 59 PHA bins.
# Reduced chi-squared = 0.9334 for 55 degrees of freedom
# Null hypothesis probability = 6.153033e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.397e-07 1.905e-08
25- 50 2.693e-07 2.405e-08
50-150 5.296e-07 8.640e-08
15-150 9.387e-07 9.450e-08
Plot creation:
Sun Sep 1 11:29:39 EDT 2013