batgrbproduct Analysis for Trigger=552376
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 13:49:07 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger552376/batgroup_hand_proc
======================================================================
Trigger: 00552376 Segment: 000
BAT Trigger Time: 386356368 [s; MET]
Trigger Stop: 386356432 [s; MET]
UTC: 2013-03-30T17:12:37.616780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 299.997875355242 Dec: 35.3091664712905 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.28
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.28
Flight Position: [ source = BAT ]
RA: 299.997875355242 Dec: 35.3091664712905 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 300.028748035424 Dec: 35.2754858016661 [deg; J2000]
{ 20h 00m 06.9s , +35d 16' 31.7" }
+/- 3.48998657767336 [arcmin] (estimated 90% radius based on SNR)
+/- 1.55524444066856 [arcmin] (formal 1-sigma fit error)
SNR: 5.10100642365911
Angular difference between Flight and Ground position is 2.523829 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
T50: 64 +/-
Measured from: 0
to: 64 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 64 second)
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 64 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.199774 0.156186 0.026542 -0.013469
0.035715 0.033874 0.029559 0.026277 [error]
Peak 0.199774 0.156186 0.026542 -0.013469
0.035715 0.033874 0.029559 0.026277 [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 6.79e-08 5.84e-08 3.43e-08 3.01e-08 1.74e-07 1.91e-07 erg/cm2
Error 1.71e-08 1.78e-08 2.15e-08 4.03e-08 5.30e-08 7.33e-08 erg/cm2
Peak flux Power-law 6.82e-02 3.28e-02 9.64e-03 3.57e-03 1.13e-01 1.14e-01 ph/cm2/s
Error 1.75e-02 9.58e-03 5.85e-03 4.50e-03 2.54e-02 2.61e-02 ph/cm2/s
Fluence Cutoff-PL 6.89e-08 6.32e-08 9.44e-09 9.19e-11 1.42e-07 1.42e-07 erg/cm2
Error 1.86e-08 2.32e-08 2.72e-08 2.74e-08 5.75e-08 7.62e-08 erg/cm2
Peak flux Cutoff-PL 6.78e-02 3.65e-02 3.01e-03 1.59e-05 1.07e-01 1.07e-01 ph/cm2/s
Error 1.91e-02 1.27e-02 7.54e-03 3.25e-03 2.56e-02 2.66e-02 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 2.768 0.577 - - 4.83e-04 2.25e-04 0.000 57
CPL 0.300 0.000 19.2 0.0 2.87e-02 0.00e+00 0.000 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.768 0.577 - - 4.83e-04 2.25e-04 0.000 57
CPL 0.300 0.000 19.2 0.0 2.87e-02 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 64.000 0.000 64.000
T90 64.000 0.000 64.000
T50 64.000 0.000 64.000
Peak 64.000 0.000 64.000
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
300.0287 35.2755 0.0376 26.1895 -156.9305 0.3784470 5.101 TRIG_00552376
Foreground time interval of the image:
31.000 64.000 (delta_t = 33.000 [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 31.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76777 ( -0.512103 0.642759 )
Norm@50keV : 4.82575E-04 ( -0.000217405 0.000232875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.039400e-01
Photon flux (15-150 keV) in 33 sec: 0.112709 ( -0.0253583 0.0254251 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73624e-07 ( -5.00811e-08 5.58509e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 31.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.299714 ( )
Epeak [keV] : 19.2086 ( )
Norm@50keV : 2.87317E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.21 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 56 degrees of freedom
# Null hypothesis probability = 2.946069e-01
Photon flux (15-150 keV) in 33 sec: 0.107362 ( -0.0244332 0.026751 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41924e-07 ( -3.69659e-08 7.80764e-08 ) ergs/cm2
Band function
Time interval is from 31.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.57507 ( 2.02863 4.57507 )
beta : -2.76776 ( -0.642235 0.511661 )
Epeak [keV] : 56.8971 ( -56.8971 -56.8971 )
Norm@50keV : 6.55891E-02 ( -0.0295488 0.0316506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.420163e-01
Photon flux (15-150 keV) in 33 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] : 5.82926 (-1.16729 1.39852)
R^2/D10^2 : 0.475575 (-0.29068 0.815413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.33 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 57 degrees of freedom
# Null hypothesis probability = 3.235417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.790e-08 3.523e-08
25- 50 6.354e-08 3.698e-08
50-150 5.162e-09 4.253e-09
15-150 1.366e-07 7.379e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.7499 (-8.12876 16.1042)
Norm : 1.30536 (-0.573605 1.1185)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.37 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.221755e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.888e-08 2.643e-08
25- 50 6.203e-08 2.816e-08
50-150 1.975e-08 1.642e-08
15-150 1.507e-07 6.656e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 49.6664 ( )
R1^2/D10^2 : 6.29753E-05 (-6.1851e-05 0.973708)
kT2 [keV] : 5.57368 (-5.57488 1.40706)
R2^2/D10^2 : 0.560236 (-0.353398 -0.559797)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.08 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.607257e-01
# Null hypothesis probability = 2.968109e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.855e-08 1.187e-07
25- 50 6.306e-08 1.930e-07
50-150 9.898e-09 7.154e-08
15-150 1.415e-07 3.731e-07
Peak spectrum fit
Power-law model
Time interval is from 31.000 sec. to 64.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.76777 ( -0.512103 0.642759 )
Norm@50keV : 4.82575E-04 ( -0.000217405 0.000232875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.087 for 57 degrees of freedom
# Null hypothesis probability = 3.039400e-01
Photon flux (15-150 keV) in 33 sec: 0.112709 ( -0.0253583 0.0254251 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.73624e-07 ( -5.00811e-08 5.58509e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 31.000 sec. to 64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.299714 ( )
Epeak [keV] : 19.2086 ( )
Norm@50keV : 2.87317E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.21 using 59 PHA bins.
# Reduced chi-squared = 1.093 for 56 degrees of freedom
# Null hypothesis probability = 2.946069e-01
Photon flux (15-150 keV) in 33 sec: 0.107362 ( -0.0244332 0.026751 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.41924e-07 ( -3.69659e-08 7.80764e-08 ) ergs/cm2
Band function
Time interval is from 31.000 sec. to 64.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -4.57507 ( 2.02863 4.57507 )
beta : -2.76776 ( -0.642235 0.511661 )
Epeak [keV] : 56.8971 ( -56.8971 -56.8971 )
Norm@50keV : 6.55891E-02 ( -0.0295488 0.0316506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.95 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Null hypothesis probability = 2.420163e-01
Photon flux (15-150 keV) in 33 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] : 5.82926 (-1.16729 1.39852)
R^2/D10^2 : 0.475575 (-0.29068 0.815413)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.33 using 59 PHA bins.
# Reduced chi-squared = 1.076 for 57 degrees of freedom
# Null hypothesis probability = 3.235417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.790e-08 3.852e-08
25- 50 6.354e-08 3.313e-08
50-150 5.162e-09 4.283e-09
15-150 1.366e-07 7.834e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 20.7499 (-8.12876 16.1042)
Norm : 1.30536 (-0.573605 1.1185)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.37 using 59 PHA bins.
# Reduced chi-squared = 1.077 for 57 degrees of freedom
# Null hypothesis probability = 3.221755e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.888e-08 2.747e-08
25- 50 6.203e-08 2.557e-08
50-150 1.975e-08 1.564e-08
15-150 1.507e-07 6.164e-08
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 49.6664 ( )
R1^2/D10^2 : 6.29753E-05 (-6.1851e-05 0.973708)
kT2 [keV] : 5.57368 (-5.57488 1.40706)
R2^2/D10^2 : 0.560236 (-0.353398 -0.559797)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.29 using 59 PHA bins.
#Fit statistic : Chi-Squared = 60.08 using 59 PHA bins.
# Reduced chi-squared = 1.114 for 55 degrees of freedom
# Reduced chi-squared = 1.092 for 55 degrees of freedom
# Null hypothesis probability = 2.607257e-01
# Null hypothesis probability = 2.968109e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.855e-08 1.147e-07
25- 50 6.306e-08 1.993e-07
50-150 9.898e-09 5.935e-08
15-150 1.415e-07 3.889e-07
Plot creation:
Wed Apr 3 14:05:12 EDT 2013