batgrbproduct Analysis for Trigger=566545
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): Sat Aug 17 00:18:40 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger566545/GCN5_download_cron
======================================================================
Trigger: 00566545 Segment: 000
BAT Trigger Time: 398310426.624 [s; MET]
Trigger Stop: 398310427.648 [s; MET]
UTC: 2013-08-16T01:46:55.708120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 197.167012694417 Dec: -58.9479813527746 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.35
Image Trigger?: NO
Rate S/N Ratio: 12.8452325786651 [ if not an image trigger ]
Image S/N Ratio: 9.35
Flight Position: [ source = BAT ]
RA: 197.167012694417 Dec: -58.9479813527746 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 197.093002581348 Dec: -58.99635220615 [deg; J2000]
{ 13h 08m 22.3s , -58d 59' 46.9" }
+/- 2.59307815469112 [arcmin] (estimated 90% radius based on SNR)
+/- 1.25793813923688 [arcmin] (formal 1-sigma fit error)
SNR: 7.79746129815469
Angular difference between Flight and Ground position is 3.696250 arcmin
Partial Coding Fraction: 0.3554688 [ including projection effects ]
Duration
T90: 29.9719999432564 +/- 1.35699668952184
Measured from: -27.7719998955727
to: 2.20000004768372 [s; relative to TRIGTIME]
T50: 17.0279999375343 +/- 14.6183692683263
Measured from: -16.3159998655319
to: 0.712000072002411 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0360000133514404
to: 0.96399998664856 [s; relative to TRIGTIME]
Total Fluence
Measured from: -28.055999994278
to: 2.56000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.232136 0.316664 0.145475 0.013136
0.047152 0.048299 0.041737 0.036656 [error]
Peak 0.058790 0.080040 0.027127 0.006695
0.009433 0.010097 0.008412 0.006600 [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 8.35e-08 1.23e-07 1.35e-07 2.77e-07 4.25e-07 6.18e-07 erg/cm2
Error 2.20e-08 2.27e-08 4.09e-08 1.70e-07 9.52e-08 2.13e-07 erg/cm2
Peak flux Power-law 7.02e-01 5.15e-01 2.51e-01 1.73e-01 1.55e+00 1.64e+00 ph/cm2/s
Error 1.49e-01 8.26e-02 6.54e-02 8.31e-02 2.47e-01 2.64e-01 ph/cm2/s
Fluence Cutoff-PL 8.15e-08 1.28e-07 1.33e-07 1.49e-07 4.10e-07 4.92e-07 erg/cm2
Error 2.36e-08 3.03e-08 4.73e-08 1.56e-07 1.09e-07 2.67e-07 erg/cm2
Peak flux Cutoff-PL 5.89e-01 6.45e-01 2.38e-01 2.16e-02 1.49e+00 1.49e+00 ph/cm2/s
Error 1.76e-01 1.25e-01 8.41e-02 4.63e-02 2.48e-01 2.50e-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 1.867 0.340 - - 1.51e-03 3.38e-04 42.220 57
CPL 1.535 1.243 58.6 0.0 2.36e-03 0.00e+00 42.030 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.038 0.278 - - 1.01e-02 2.05e-03 53.300 57
CPL 0.024 1.708 40.0 10.3 1.53e-01 1.07e+00 47.420 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: 1.664000 sec.
T50 in the 50-300 keV band: 1.152000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 30.616 -28.056 2.560
T90 29.972 -27.772 2.200
T50 17.028 -16.316 0.712
Peak 1.000 -0.036 0.964
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
197.0930 -58.9964 0.0247 31.9 56.9 0.7317 7.8 TRIG_00566545
------------------------------------------
Foreground time interval of the image:
-28.056 2.560 (delta_t = 30.616 [sec])
Background time interval of the image:
-173.323 -28.056 (delta_t = 145.267 [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 -28.056 sec. to 2.560 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.86717 ( -0.327248 0.353698 )
Norm@50keV : 1.51150E-03 ( -0.000344822 0.000331842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.22 using 59 PHA bins.
# Reduced chi-squared = 0.7407 for 57 degrees of freedom
# Null hypothesis probability = 9.281845e-01
Photon flux (15-150 keV) in 30.62 sec: 0.213956 ( -0.0394468 0.0394555 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.25483e-07 ( -9.36461e-08 9.68397e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -28.056 sec. to 2.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.53509 ( -1.81592 0.670488 )
Epeak [keV] : 58.6263 ( )
Norm@50keV : 2.35858E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.03 using 59 PHA bins.
# Reduced chi-squared = 0.7506 for 56 degrees of freedom
# Null hypothesis probability = 9.168592e-01
Photon flux (15-150 keV) in 30.62 sec: 0.211625 ( -0.040612 0.040266 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.10195e-07 ( -1.097e-07 1.08738e-07 ) ergs/cm2
Band function
Time interval is from -28.056 sec. to 2.560 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 2.50817 ( -3.75856 -3.75856 )
beta : -2.09956 ( -0.726686 0.500975 )
Epeak [keV] : 26.9898 ( -25.7522 61.7026 )
Norm@50keV : 2.37576 ( -2.371 99.053 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.35 using 59 PHA bins.
# Reduced chi-squared = 0.7518 for 55 degrees of freedom
# Null hypothesis probability = 9.135447e-01
Photon flux (15-150 keV) in 30.62 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] : 9.93280 (-2.0095 2.612)
R^2/D10^2 : 0.103550 (-0.0608584 0.141001)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.79 using 59 PHA bins.
# Reduced chi-squared = 0.8385 for 57 degrees of freedom
# Null hypothesis probability = 8.023945e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 6.356e-08 2.079e-08
25- 50 1.565e-07 4.976e-08
50-150 8.011e-08 3.905e-08
15-150 3.002e-07 1.054e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 82.2354 (-37.6908 -82.2354)
Norm : 0.999611 (-0.245222 0.346549)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 42.09 using 59 PHA bins.
# Reduced chi-squared = 0.7384 for 57 degrees of freedom
# Null hypothesis probability = 9.302207e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.955e-08 2.197e-08
25- 50 1.318e-07 3.584e-08
50-150 1.895e-07 1.337e-07
15-150 4.009e-07 1.649e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.18296 (-3.39487 3.17179)
R1^2/D10^2 : 0.286107 ( )
kT2 [keV] : 31.1170 (-18.3683 -31.1843)
R2^2/D10^2 : 1.00733E-03 (-0.000975741 0.00350778)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 41.71 using 59 PHA bins.
#Fit statistic : Chi-Squared = 41.37 using 59 PHA bins.
# Reduced chi-squared = 0.7584 for 55 degrees of freedom
# Reduced chi-squared = 0.7521 for 55 degrees of freedom
# Null hypothesis probability = 9.068434e-01
# Null hypothesis probability = 9.132793e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 8.018e-08 4.720e-08
25- 50 1.277e-07 7.049e-08
50-150 1.814e-07 1.244e-07
15-150 3.894e-07 2.127e-07
Peak spectrum fit
Power-law model
Time interval is from -0.036 sec. to 0.964 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.03787 ( -0.264655 0.290384 )
Norm@50keV : 1.01483E-02 ( -0.00208206 0.00202597 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.30 using 59 PHA bins.
# Reduced chi-squared = 0.9351 for 57 degrees of freedom
# Null hypothesis probability = 6.146377e-01
Photon flux (15-150 keV) in 1 sec: 1.54936 ( -0.246969 0.246986 ) ph/cm2/s
Energy fluence (15-150 keV) : 9.38007e-08 ( -1.76497e-08 1.81382e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.036 sec. to 0.964 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41364E-02 ( -1.94606 1.4702 )
Epeak [keV] : 39.9834 ( -9.69314 10.9563 )
Norm@50keV : 0.153060 ( -0.153916 1.97914 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.42 using 59 PHA bins.
# Reduced chi-squared = 0.8469 for 56 degrees of freedom
# Null hypothesis probability = 7.858229e-01
Photon flux (15-150 keV) in 1 sec: 1.49097 ( -0.24714 0.24849 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.32742e-08 ( -1.59489e-08 1.79718e-08 ) ergs/cm2
Band function
Time interval is from -0.036 sec. to 0.964 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -6.85274E-02 ( 1.17761 1.26521 )
beta : -10.00000 ( 10 6.32685e-11 )
Epeak [keV] : 39.9328 ( -7.58251 8.77102 )
Norm@50keV : 0.144637 ( -0.0224357 1.99825 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.43 using 59 PHA bins.
# Reduced chi-squared = 0.8623 for 55 degrees of freedom
# Null hypothesis probability = 7.561109e-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] : 10.2247 (-1.49912 1.69262)
R^2/D10^2 : 0.718113 (-0.321449 0.589558)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.30 using 59 PHA bins.
# Reduced chi-squared = 0.8649 for 57 degrees of freedom
# Null hypothesis probability = 7.560261e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.540e-08 3.901e-09
25- 50 3.950e-08 9.635e-09
50-150 2.198e-08 8.215e-09
15-150 7.688e-08 1.735e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 59.1141 (-19.688 36.3426)
Norm : 8.37692 (-1.8807 2.3476)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 49.47 using 59 PHA bins.
# Reduced chi-squared = 0.8680 for 57 degrees of freedom
# Null hypothesis probability = 7.502410e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.100e-08 4.325e-09
25- 50 3.182e-08 6.995e-09
50-150 3.576e-08 1.588e-08
15-150 8.858e-08 2.419e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 3.57679 (-3.57679 -3.57679)
R1^2/D10^2 : 14.7620 (-14.762 -14.762)
kT2 [keV] : 11.6260 (-2.18471 -11.626)
R2^2/D10^2 : 0.391987 (-0.391987 0.603374)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.92 using 59 PHA bins.
# Reduced chi-squared = 0.8532 for 55 degrees of freedom
# Null hypothesis probability = 7.724417e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.877e-08 9.855e-09
25- 50 3.582e-08 1.997e-08
50-150 2.693e-08 1.639e-08
15-150 8.152e-08 4.305e-08
Plot creation:
Sat Aug 17 00:42:27 EDT 2013