batgrbproduct Analysis for Trigger=552063
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 Mar 27 13:13:01 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552063/GCN5_download_cron
======================================================================
Trigger: 00552063 Segment: 000
BAT Trigger Time: 386041664.384 [s; MET]
Trigger Stop: 386041666.432 [s; MET]
UTC: 2013-03-27T01:47:34.014540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 91.9916773554106 Dec: 55.7304273950613 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.19
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 7.19
Flight Position: [ source = BAT ]
RA: 91.9916773554106 Dec: 55.7304273950613 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 91.9841083990836 Dec: 55.7322778037484 [deg; J2000]
{ 06h 07m 56.2s , +55d 43' 56.2" }
+/- 2.24108615845383 [arcmin] (estimated 90% radius based on SNR)
+/- 1.21226728752949 [arcmin] (formal 1-sigma fit error)
SNR: 9.60424662934541
Angular difference between Flight and Ground position is 0.278775 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 9 +/- 2.82842712474619
Measured from: -4.38399988412857
to: 4.61600011587143 [s; relative to TRIGTIME]
T50: 3 +/- 2.23606797749979
Measured from: -0.383999884128571
to: 2.61600011587143 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.61599999666214
to: 1.61599999666214 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.38400000333786
to: 5.61599999666214 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.192789 0.137881 0.095483 -0.000248
0.023434 0.024343 0.021184 0.018973 [error]
Peak 0.034790 0.033224 0.026489 0.001236
0.007462 0.008039 0.007031 0.005770 [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 6.38e-08 7.42e-08 6.21e-08 8.77e-08 2.32e-07 2.88e-07 erg/cm2
Error 1.34e-08 1.25e-08 2.13e-08 5.90e-08 4.70e-08 8.47e-08 erg/cm2
Peak flux Power-law 3.56e-01 2.91e-01 1.61e-01 1.31e-01 8.67e-01 9.40e-01 ph/cm2/s
Error 1.32e-01 6.73e-02 6.32e-02 1.05e-01 2.01e-01 2.21e-01 ph/cm2/s
Fluence Cutoff-PL 6.47e-08 7.39e-08 6.07e-08 8.40e-08 2.28e-07 2.84e-07 erg/cm2
Error 1.32e-08 1.28e-08 2.12e-08 6.51e-08 4.67e-08 8.89e-08 erg/cm2
Peak flux Cutoff-PL 3.56e-01 2.91e-01 1.61e-01 1.30e-01 8.67e-01 9.39e-01 ph/cm2/s
Error 1.27e-01 6.73e-02 6.28e-02 1.37e-01 2.01e-01 2.19e-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 2.257 0.358 - - 2.44e-03 6.00e-04 62.180 57
CPL 1.989 0.000 2.7 0.0 3.29e-03 0.00e+00 62.950 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 1.854 0.498 - - 6.16e-03 1.80e-03 55.170 57
CPL 2.398 0.000 144.6 0.0 3.14e-03 0.00e+00 53.800 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 10.000 -4.384 5.616
T90 9.000 -4.384 4.616
T50 3.000 -0.384 2.616
Peak 1.000 0.616 1.616
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
91.9841 +55.7323 0.0200 36.3 -150.6 0.4430 9.6 TRIG_00552063
------------------------------------------
Foreground time interval of the image:
-4.384 5.616 (delta_t = 10.000 [sec])
Background time interval of the image:
-89.983 -4.384 (delta_t = 85.599 [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 -4.384 sec. to 5.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.25664 ( -0.331663 0.384878 )
Norm@50keV : 2.44350E-03 ( -0.000617857 0.000581575 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.091 for 57 degrees of freedom
# Null hypothesis probability = 2.969829e-01
Photon flux (15-150 keV) in 10 sec: 0.416963 ( -0.0641909 0.064191 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.31738e-07 ( -4.61039e-08 4.79369e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.384 sec. to 5.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.98870 ( )
Epeak [keV] : 2.74763 ( )
Norm@50keV : 3.29056E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.95 using 59 PHA bins.
# Reduced chi-squared = 1.124 for 56 degrees of freedom
# Null hypothesis probability = 2.440321e-01
Photon flux (15-150 keV) in 10 sec: 0.416666 ( -0.064246 0.06422 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.28189e-07 ( -4.2878e-08 5.0491e-08 ) ergs/cm2
Band function
Time interval is from -4.384 sec. to 5.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -9.97759 ( 9.97759 9.97759 )
beta : -2.25664 ( -0.384839 0.331816 )
Epeak [keV] : 10.3029 ( -10.3029 -10.3029 )
Norm@50keV : 0.332105 ( -0.0839792 0.0790406 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 62.18 using 59 PHA bins.
# Reduced chi-squared = 1.131 for 55 degrees of freedom
# Null hypothesis probability = 2.358512e-01
Photon flux (15-150 keV) in 10 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] : 8.55802 (-2.54659 2.85305)
R^2/D10^2 : 0.325260 (-0.318261 0.999542)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.55 using 59 PHA bins.
# Reduced chi-squared = 1.448 for 57 degrees of freedom
# Null hypothesis probability = 1.509875e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.508e-08 1.439e-08
25- 50 8.841e-08 2.715e-08
50-150 2.884e-08 1.456e-08
15-150 1.623e-07 3.885e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 50.0086 (-19.775 39.7469)
Norm : 2.31909 (-0.603046 0.987763)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.74 using 59 PHA bins.
# Reduced chi-squared = 1.153 for 57 degrees of freedom
# Null hypothesis probability = 1.998682e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.671e-08 1.189e-08
25- 50 8.145e-08 1.488e-08
50-150 7.909e-08 3.451e-08
15-150 2.173e-07 5.415e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.45128 (-0.957405 1.22012)
R1^2/D10^2 : 13.4198 (-10.376 73.0034)
kT2 [keV] : 16.5315 (-4.30328 7.43958)
R2^2/D10^2 : 2.07357E-02 (-0.0155795 0.0413681)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.15 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 55 degrees of freedom
# Null hypothesis probability = 3.264950e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.858e-08 3.590e-08
25- 50 6.350e-08 3.116e-08
50-150 9.727e-08 5.989e-08
15-150 2.293e-07 1.204e-07
Peak spectrum fit
Power-law model
Time interval is from 0.616 sec. to 1.616 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.85416 ( -0.462117 0.533572 )
Norm@50keV : 6.15779E-03 ( -0.00189468 0.0017016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 0.9679 for 57 degrees of freedom
# Null hypothesis probability = 5.439544e-01
Photon flux (15-150 keV) in 1 sec: 0.867017 ( -0.201334 0.201309 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.66136e-08 ( -1.62078e-08 1.66123e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.616 sec. to 1.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.39780 ( )
Epeak [keV] : 144.569 ( )
Norm@50keV : 3.14139E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.80 using 59 PHA bins.
# Reduced chi-squared = 0.9606 for 56 degrees of freedom
# Null hypothesis probability = 5.587658e-01
Photon flux (15-150 keV) in 1 sec: 0.866654 ( -0.200305 0.201246 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.65277e-08 ( -1.61344e-08 1.60547e-08 ) ergs/cm2
Band function
Time interval is from 0.616 sec. to 1.616 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -3.89028 ( 3.97778 3.89028 )
beta : -1.85434 ( -0.534034 0.462901 )
Epeak [keV] : 106.034 ( -106.034 -106.034 )
Norm@50keV : 0.836876 ( -0.257513 0.231273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.17 using 59 PHA bins.
# Reduced chi-squared = 1.003 for 55 degrees of freedom
# Null hypothesis probability = 4.681195e-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] : 11.2511 (-5.16163 9.40565)
R^2/D10^2 : 0.238994 (-0.200548 2.14497)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.83 using 59 PHA bins.
# Reduced chi-squared = 1.190 for 57 degrees of freedom
# Null hypothesis probability = 1.542707e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.348e-09 3.945e-09
25- 50 1.847e-08 1.030e-08
50-150 1.343e-08 9.355e-09
15-150 3.825e-08 2.386e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 117.448 (-73.0615 -118.576)
Norm : 3.63573 (-0.990306 1.66256)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.87 using 59 PHA bins.
# Reduced chi-squared = 0.9978 for 57 degrees of freedom
# Null hypothesis probability = 4.798622e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.477e-09 5.560e-09
25- 50 1.689e-08 9.800e-09
50-150 2.982e-08 2.086e-08
15-150 5.619e-08 3.598e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.73660 (-1.38872 2.10742)
R1^2/D10^2 : 18.0353 (-16.3811 238.475)
kT2 [keV] : 25.6514 (-9.80772 27.135)
R2^2/D10^2 : 1.16203E-02 (-0.0102293 0.0345882)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.92 using 59 PHA bins.
# Reduced chi-squared = 0.9621 for 55 degrees of freedom
# Null hypothesis probability = 5.545821e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.299e-08 7.535e-09
25- 50 1.099e-08 5.964e-09
50-150 3.661e-08 2.316e-08
15-150 6.058e-08 3.295e-08
Plot creation:
Wed Mar 27 13:40:41 EDT 2013