batgrbproduct Analysis for Trigger=553847
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 Apr 19 14:00:33 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger553847/GCN5_download_cron
======================================================================
Trigger: 00553847 Segment: 000
BAT Trigger Time: 388004464 [s; MET]
Trigger Stop: 388004528 [s; MET]
UTC: 2013-04-18T19:00:53.544240 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 149.043481794784 Dec: 13.6495345491784 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.78
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.78
Flight Position: [ source = BAT ]
RA: 149.043481794784 Dec: 13.6495345491784 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 149.045197168404 Dec: 13.674497582806 [deg; J2000]
{ 09h 56m 10.8s , +13d 40' 28.2" }
+/- 1.91223516939817 [arcmin] (estimated 90% radius based on SNR)
+/- 0.691282429598005 [arcmin] (formal 1-sigma fit error)
SNR: 12.0480433329257
Angular difference between Flight and Ground position is 1.501117 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 286.63999992609 +/- 46.0880984824801
Measured from: -36.3719998598099
to: 250.26800006628 [s; relative to TRIGTIME]
T50: 146.05999994278 +/- 29.6767870244181
Measured from: -11.4439998865128
to: 134.616000056267 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -37.6759999990463
to: -36.6759999990463 [s; relative to TRIGTIME]
Total Fluence
Measured from: -40.1639999747276
to: 285.587999999523 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.278355 1.507861 0.527839 0.121313
0.101055 0.103735 0.090916 0.081001 [error]
Peak 0.027609 0.036876 0.000242 0.002262
0.008549 0.008343 0.007472 0.006831 [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 4.29e-07 5.59e-07 5.32e-07 9.00e-07 1.82e-06 2.42e-06 erg/cm2
Error 5.21e-08 4.91e-08 8.51e-08 2.82e-07 1.93e-07 3.78e-07 erg/cm2
Peak flux Power-law 3.37e-01 1.93e-01 6.96e-02 3.31e-02 6.17e-01 6.32e-01 ph/cm2/s
Error 1.22e-01 6.91e-02 4.51e-02 4.32e-02 1.96e-01 2.04e-01 ph/cm2/s
Fluence Cutoff-PL 4.11e-07 6.00e-07 4.98e-07 2.80e-07 1.68e-06 1.79e-06 erg/cm2
Error 5.82e-08 7.15e-08 1.08e-07 4.50e-07 2.42e-07 5.72e-07 erg/cm2
Peak flux Cutoff-PL 2.78e-01 2.93e-01 3.70e-02 1.60e-04 6.08e-01 6.08e-01 ph/cm2/s
Error 2.11e-01 1.06e-01 4.79e-02 5.70e-03 1.64e-01 1.87e-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 2.069 0.171 - - 6.03e-04 6.95e-05 58.720 57
CPL 1.427 0.835 35.1 0.0 1.46e-03 0.00e+00 56.750 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.463 0.634 - - 3.22e-03 1.63e-03 64.230 57
CPL -1.642 5.268 30.7 12.4 1.40e+00 5.09e+04 59.370 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 325.752 -40.164 285.588
T90 286.640 -36.372 250.268
T50 146.060 -11.444 134.616
Peak 1.000 -37.676 -36.676
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
149.0452 +13.6745 0.0160 23.5 8.9 1.3637 12.0 TRIG_00553847
------------------------------------------
Foreground time interval of the image:
-12.599 73.101 (delta_t = 85.700 [sec])
Background time interval of the image:
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 -40.164 sec. to 285.588 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.06930 ( -0.166797 0.175182 )
Norm@50keV : 6.02828E-04 ( -7.01153e-05 6.87992e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.72 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 57 degrees of freedom
# Null hypothesis probability = 4.120720e-01
Photon flux (15-150 keV) in 325.8 sec: 9.34287E-02 ( -0.00808043 0.00808175 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.81973e-06 ( -1.91299e-07 1.95476e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.164 sec. to 285.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.42651 ( -0.988413 0.681393 )
Epeak [keV] : 35.1291 ( )
Norm@50keV : 1.45889E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.75 using 59 PHA bins.
# Reduced chi-squared = 1.013 for 56 degrees of freedom
# Null hypothesis probability = 4.468294e-01
Photon flux (15-150 keV) in 325.8 sec: 9.09056E-02 ( -0.0086301 0.0086069 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.68211e-06 ( -2.33006e-07 2.51247e-07 ) ergs/cm2
Band function
Time interval is from -40.164 sec. to 285.588 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.813923 ( -1.44034 0.679163 )
beta : -2.51267 ( 2.5111 0.467546 )
Epeak [keV] : 33.3855 ( -13.1932 15.3699 )
Norm@50keV : 3.70499E-03 ( -0.00193399 143.719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.50 using 59 PHA bins.
# Reduced chi-squared = 1.009 for 55 degrees of freedom
# Null hypothesis probability = 4.556685e-01
Photon flux (15-150 keV) in 325.8 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] : 9.18156 (-0.855463 0.94817)
R^2/D10^2 : 5.96308E-02 (-0.0190621 0.0278957)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 73.18 using 59 PHA bins.
# Reduced chi-squared = 1.284 for 57 degrees of freedom
# Null hypothesis probability = 7.311263e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.221e-07 4.794e-08
25- 50 7.061e-07 7.738e-08
50-150 2.862e-07 7.666e-08
15-150 1.314e-06 1.482e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 56.4267 (-13.1477 19.3909)
Norm : 0.501600 (-0.0735475 0.0844849)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.75 using 59 PHA bins.
# Reduced chi-squared = 0.9955 for 57 degrees of freedom
# Null hypothesis probability = 4.845759e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.064e-07 4.920e-08
25- 50 6.066e-07 5.913e-08
50-150 6.552e-07 1.549e-07
15-150 1.668e-06 2.059e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.29081 (-3.25411 1.40296)
R1^2/D10^2 : 0.123490 (-0.0512781 0.516158)
kT2 [keV] : 28.9819 (-19.6979 -32.1739)
R2^2/D10^2 : 3.87516E-04 (-0.000263733 0.0157542)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 57.78 using 59 PHA bins.
# Reduced chi-squared = 1.051 for 55 degrees of freedom
# Null hypothesis probability = 3.729827e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.746e-07 9.538e-08
25- 50 6.324e-07 1.805e-07
50-150 7.204e-07 3.797e-07
15-150 1.727e-06 5.853e-07
Peak spectrum fit
Power-law model
Time interval is from -37.676 sec. to -36.676 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.46289 ( -0.553611 0.714747 )
Norm@50keV : 3.21565E-03 ( -0.00160319 0.00165957 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 64.23 using 59 PHA bins.
# Reduced chi-squared = 1.127 for 57 degrees of freedom
# Null hypothesis probability = 2.381866e-01
Photon flux (15-150 keV) in 1 sec: 0.617311 ( -0.195449 0.197026 ) ph/cm2/s
Energy fluence (15-150 keV) : 3.17549e-08 ( -1.21282e-08 1.35537e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -37.676 sec. to -36.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -1.64237 ( -7.27715 3.25822 )
Epeak [keV] : 30.7402 ( -16.1991 8.61606 )
Norm@50keV : 1.39946 ( -1.72806 101851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.37 using 59 PHA bins.
# Reduced chi-squared = 1.060 for 56 degrees of freedom
# Null hypothesis probability = 3.539837e-01
Photon flux (15-150 keV) in 1 sec: 0.607778 ( -0.18642 0.142042 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.82582e-08 ( -8.9396e-09 1.01623e-08 ) ergs/cm2
Band function
Time interval is from -37.676 sec. to -36.676 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 1.96681 ( -3.22514 -1.64721 )
beta : -10.0000 ( 10 10 )
Epeak [keV] : 30.9410 ( -14.6686 8.31852 )
Norm@50keV : 2.26165 ( -2.26193 274.599 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.33 using 59 PHA bins.
# Reduced chi-squared = 1.079 for 55 degrees of freedom
# Null hypothesis probability = 3.207464e-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] : 7.89953 (-1.84989 2.25375)
R^2/D10^2 : 0.814081 (-0.81408 1.54019)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.32 using 59 PHA bins.
# Reduced chi-squared = 1.041 for 57 degrees of freedom
# Null hypothesis probability = 3.911314e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.099e-09 5.455e-09
25- 50 1.558e-08 9.925e-09
50-150 3.923e-09 3.126e-09
15-150 2.860e-08 1.828e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 31.6566 (-13.9678 32.4812)
Norm : 4.98181 (-2.16155 4.04857)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.69 using 59 PHA bins.
# Reduced chi-squared = 1.082 for 57 degrees of freedom
# Null hypothesis probability = 3.120719e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.041e-08 5.696e-09
25- 50 1.225e-08 7.516e-09
50-150 7.189e-09 5.712e-09
15-150 2.985e-08 1.859e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.32 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.91 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.77 using 59 PHA bins.
#Fit statistic : Chi-Squared = 58.74 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Reduced chi-squared = 1.071 for 55 degrees of freedom
# Reduced chi-squared = 1.069 for 55 degrees of freedom
# Reduced chi-squared = 1.068 for 55 degrees of freedom
# Null hypothesis probability = 3.211530e-01
# Null hypothesis probability = 3.344714e-01
# Null hypothesis probability = 3.390509e-01
# Null hypothesis probability = 3.399803e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 0.000e+00 0.000e+00
25- 50 0.000e+00 0.000e+00
50-150 0.000e+00 0.000e+00
15-150 0.000e+00 0.000e+00
Plot creation:
Fri Apr 19 14:35:07 EDT 2013