batgrbproduct Analysis for Trigger=552381
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 Apr 3 13:00:49 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552381/batgroup_hand_proc
======================================================================
Trigger: 00552381 Segment: 000
BAT Trigger Time: 386358240 [s; MET]
Trigger Stop: 386358304 [s; MET]
UTC: 2013-03-30T17:43:49.616680 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 83.6292233117723 Dec: 21.427550742758 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 20.91
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 20.91
Flight Position: [ source = BAT ]
RA: 83.6292233117723 Dec: 21.427550742758 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 83.6290943140244 Dec: 21.4224916754342 [deg; J2000]
{ 05h 34m 31.0s , +21d 25' 21.0" }
+/- nan [arcmin] (estimated 90% radius based on SNR)
+/- 0.193616992740824 [arcmin] (formal 1-sigma fit error)
SNR: -54.4738259279209
Angular difference between Flight and Ground position is 0.303630 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 48 +/- 144.886162210199
Measured from: 660
to: 708 [s; relative to TRIGTIME]
T50: 16 +/- 22.6274169979695
Measured from: 676
to: 692 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 843.5
to: 844.5 [s; relative to TRIGTIME]
Total Fluence
Measured from: 660
to: 836 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.043089 0.056528 0.019615 -0.006396
0.010067 0.009770 0.008541 0.007391 [error]
Peak 0.036524 0.008251 0.009365 0.000802
0.005733 0.005730 0.004813 0.004214 [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 1.57e-08 1.96e-08 1.79e-08 2.85e-08 6.30e-08 8.17e-08 erg/cm2
Error 4.28e-09 4.39e-09 7.49e-09 2.33e-08 1.72e-08 3.26e-08 erg/cm2
Peak flux Power-law 2.64e-01 1.27e-01 3.74e-02 1.39e-02 4.36e-01 4.42e-01 ph/cm2/s
Error 8.39e-02 5.27e-02 3.29e-02 2.56e-02 1.29e-01 1.34e-01 ph/cm2/s
Fluence Cutoff-PL 1.41e-08 2.27e-08 1.68e-08 5.09e-09 5.75e-08 5.87e-08 erg/cm2
Error 5.28e-09 6.57e-09 8.50e-09 2.43e-08 1.73e-08 3.31e-08 erg/cm2
Peak flux Cutoff-PL 2.63e-01 1.27e-01 3.73e-02 1.38e-02 4.36e-01 4.43e-01 ph/cm2/s
Error 8.29e-02 5.28e-02 3.80e-02 1.95e-02 1.12e-01 1.32e-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 2.133 0.433 - - 1.09e-04 3.34e-05 0.000 57
CPL 0.884 2.024 36.8 0.0 5.78e-04 1.25e-02 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.765 0.852 - - 1.87e-03 1.25e-03 0.000 57
CPL 1.951 0.000 1.5 0.0 8.00e-03 0.00e+00 0.000 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 176.000 660.000 836.000
T90 48.000 660.000 708.000
T50 16.000 676.000 692.000
Peak 1.000 843.500 844.500
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
83.6291 21.4225 0.0035 0.0653 143.4318 -2.4336669 -54.474 TRIG_00552381
Foreground time interval of the image:
660.000 722.000 (delta_t = 62.000 [sec])
Background time interval of the image:
-60.000 423.140 (delta_t = 483.140 [sec])
601.000 660.000 (delta_t = 59.000 [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 660.000 sec. to 722.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.13259 ( -0.395346 0.471302 )
Norm@50keV : 1.08934E-04 ( -3.41997e-05 3.25888e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 66.36 using 59 PHA bins.
# Reduced chi-squared = 1.164 for 57 degrees of freedom
# Null hypothesis probability = 1.854759e-01
Photon flux (15-150 keV) in 62 sec: 1.74189E-02 ( -0.00365137 0.00365234 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.29635e-08 ( -1.67007e-08 1.76812e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 660.000 sec. to 722.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.884312 ( -2.85847 1.18978 )
Epeak [keV] : 36.8099 ( -36.8332 -36.8332 )
Norm@50keV : 5.78360E-04 ( -0.000581105 0.0243297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.25 using 59 PHA bins.
# Reduced chi-squared = 1.165 for 56 degrees of freedom
# Null hypothesis probability = 1.860712e-01
Photon flux (15-150 keV) in 62 sec: 1.67792E-02 ( -0.0018889 0.0037775 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.7543e-08 ( -1.52669e-08 1.92707e-08 ) ergs/cm2
Band function
Time interval is from 660.000 sec. to 722.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.904120 ( -5.01449 2.69667 )
beta : -9.09532 ( 9.2633 19.2633 )
Epeak [keV] : 36.7512 ( -12.655 -36.8258 )
Norm@50keV : 5.63214E-04 ( -0.000340921 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.25 using 59 PHA bins.
# Reduced chi-squared = 1.186 for 55 degrees of freedom
# Null hypothesis probability = 1.622323e-01
Photon flux (15-150 keV) in 62 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] : 10.1446 (-2.00128 2.37381)
R^2/D10^2 : 7.91392E-03 (-0.00438847 0.0101629)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 67.19 using 59 PHA bins.
# Reduced chi-squared = 1.179 for 57 degrees of freedom
# Null hypothesis probability = 1.675066e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.033e-08 4.338e-09
25- 50 2.621e-08 8.844e-09
50-150 1.426e-08 7.749e-09
15-150 5.081e-08 1.853e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 53.7726 (-22.9351 56.0738)
Norm : 9.58281E-02 (-0.0280186 0.0435613)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 65.40 using 59 PHA bins.
# Reduced chi-squared = 1.147 for 57 degrees of freedom
# Null hypothesis probability = 2.082503e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.476e-08 4.473e-09
25- 50 2.173e-08 7.741e-09
50-150 2.256e-08 1.393e-08
15-150 5.905e-08 2.821e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 1.22652 (-1.01515 1.3177)
R1^2/D10^2 : 1420.25 (-1420 -1421.97)
kT2 [keV] : 11.2332 (-2.23153 2.90931)
R2^2/D10^2 : 5.03149E-03 (-0.00300235 0.00738233)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.40 using 59 PHA bins.
# Reduced chi-squared = 1.062 for 55 degrees of freedom
# Null hypothesis probability = 3.516281e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.209e-08 5.021e-09
25- 50 2.398e-08 1.246e-08
50-150 1.736e-08 1.001e-08
15-150 5.343e-08 2.630e-08
Peak spectrum fit
Power-law model
Time interval is from 843.500 sec. to 844.500 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76521 ( -0.723369 0.981098 )
Norm@50keV : 1.86953E-03 ( -0.00116092 0.00133879 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.32 using 59 PHA bins.
# Reduced chi-squared = 0.9354 for 57 degrees of freedom
# Null hypothesis probability = 6.139605e-01
Photon flux (15-150 keV) in 1 sec: 0.435882 ( -0.128473 0.128816 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.03622e-08 ( -8.07567e-09 9.78724e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 843.500 sec. to 844.500 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.95104 ( )
Epeak [keV] : 1.45510 ( )
Norm@50keV : 7.99590E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.31 using 59 PHA bins.
# Reduced chi-squared = 0.9698 for 56 degrees of freedom
# Null hypothesis probability = 5.391778e-01
Photon flux (15-150 keV) in 1 sec: 0.436109 ( -0.128891 0.095594 ) ph/cm2/s
Energy fluence (15-150 keV) : 2.05561e-08 ( -1.12167e-08 8.9756e-09 ) ergs/cm2
Band function
Time interval is from 843.500 sec. to 844.500 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.17937 ( 1.60877 1.60877 )
beta : -3.16416 ( 2.86622 0.803336 )
Epeak [keV] : 17.3121 ( -7.02686 196.054 )
Norm@50keV : 1577.68 ( -1580.72 3.24316e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.61 using 59 PHA bins.
# Reduced chi-squared = 0.9565 for 55 degrees of freedom
# Null hypothesis probability = 5.666375e-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] : 4.39751 (-1.09963 1.51634)
R^2/D10^2 : 6.42941 (-6.42941 20.8001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.35 using 59 PHA bins.
# Reduced chi-squared = 0.9536 for 57 degrees of freedom
# Null hypothesis probability = 5.750261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 9.086e-09 5.230e-09
25- 50 4.264e-09 2.819e-09
50-150 8.943e-11 9.250e-11
15-150 1.344e-08 8.035e-09
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 15.2652 (-7.45776 28.2009)
Norm : 7.11567 (-4.56772 13.889)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.51 using 59 PHA bins.
# Reduced chi-squared = 0.9564 for 57 degrees of freedom
# Null hypothesis probability = 5.689213e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.438e-09 4.629e-09
25- 50 5.850e-09 3.791e-09
50-150 1.068e-09 1.090e-09
15-150 1.536e-08 9.584e-09
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 4.06677 (-1.06392 1.36302)
R1^2/D10^2 : 8.83955 (-6.63012 15.1914)
kT2 [keV] : 39.0614 (-24.412 -39.0232)
R2^2/D10^2 : 1.14790E-03 (-0.00113239 0.0204115)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.21 using 59 PHA bins.
# Reduced chi-squared = 0.8947 for 55 degrees of freedom
# Null hypothesis probability = 6.944638e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.936e-09 5.125e-09
25- 50 4.851e-09 2.816e-09
50-150 1.449e-08 9.020e-09
15-150 2.828e-08 1.523e-08
Plot creation:
Wed Apr 3 13:14:46 EDT 2013