batgrbproduct Analysis for Trigger=573217
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 Oct 5 07:47:57 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger573217/GCN5_download_cron
======================================================================
Trigger: 00573217 Segment: 000
BAT Trigger Time: 402626208 [s; MET]
Trigger Stop: 402627704 [s; MET]
UTC: 2013-10-05T00:36:36.887980 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 297.460105251428 Dec: 30.2063362184656 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 6.83
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 6.83
Flight Position: [ source = BAT ]
RA: 297.460105251428 Dec: 30.2063362184656 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 297.427911991591 Dec: 30.2485227384223 [deg; J2000]
{ 19h 49m 42.7s , +30d 14' 54.7" }
+/- 4.42464837018457 [arcmin] (estimated 90% radius based on SNR)
+/- 2.21540835156568 [arcmin] (formal 1-sigma fit error)
SNR: 3.6344143053922
Angular difference between Flight and Ground position is 3.031892 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 1496 +/-
Measured from: 0
to: 1496 [s; relative to TRIGTIME]
T50: 1496 +/-
Measured from: 0
to: 1496 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 1496 second)
Measured from: 0
to: 1496 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 1496 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.970784 0.817634 0.054439 0.202779
0.190290 0.190552 0.165963 0.150395 [error]
Peak 0.970784 0.817634 0.054439 0.202779
0.190290 0.190552 0.165963 0.150395 [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 2.62e-07 2.78e-07 2.09e-07 2.55e-07 8.46e-07 1.00e-06 erg/cm2
Error 8.58e-08 9.04e-08 1.21e-07 3.19e-07 3.05e-07 4.75e-07 erg/cm2
Peak flux Power-law 1.15e-02 6.80e-03 2.55e-03 1.28e-03 2.15e-02 2.21e-02 ph/cm2/s
Error 3.83e-03 2.15e-03 1.43e-03 1.51e-03 6.22e-03 6.48e-03 ph/cm2/s
Fluence Cutoff-PL 2.76e-07 3.82e-07 5.11e-09 2.77e-15 6.63e-07 6.64e-07 erg/cm2
Error 9.12e-08 1.29e-07 1.97e-08 1.07e-11 1.67e-07 1.66e-07 erg/cm2
Peak flux Cutoff-PL 1.13e-02 1.02e-02 8.01e-05 2.28e-11 2.16e-02 2.16e-02 ph/cm2/s
Error 3.85e-03 3.11e-03 2.90e-04 8.41e-08 5.23e-03 5.24e-03 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 2.418 0.541 - - 1.15e-04 5.09e-05 71.440 57
CPL -8.548 0.000 27.1 3.1 7.52e+03 5.28e+04 56.890 56
The chi2 of BB fit is 61.91 which shows a significant improvement in the fit over a PL.
Check the BB fit.
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.418 0.541 - - 1.15e-04 5.09e-05 71.440 57
CPL -8.548 0.000 27.1 3.1 7.52e+03 5.28e+04 56.890 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 1496.000 0.000 1496.000
T90 1496.000 0.000 1496.000
T50 1496.000 0.000 1496.000
Peak 1496.000 0.000 1496.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
297.4279 +30.2485 0.0530 33.2 15.3 1.9802 3.6 TRIG_00573217
------------------------------------------
Foreground time interval of the image:
213.000 744.440 (delta_t = 531.440 [sec])
746.000 963.019 (delta_t = 217.019 [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
Multiple GTIs in the spectrum
tstart tstop
213.000000 744.440000
746.000000 963.018900
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41762 ( -0.493063 0.589126 )
Norm@50keV : 1.15216E-04 ( -4.9637e-05 5.22093e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.44 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.451039e-02
Photon flux (15-150 keV) in 748.5 sec: 2.15468E-02 ( -0.00619924 0.00623631 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46426e-07 ( -2.89964e-07 3.20794e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
213.000000 744.440000
746.000000 963.018900
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.54780 ( )
Epeak [keV] : 27.0513 ( -2.95525 3.20913 )
Norm@50keV : 7517.99 ( -8682.32 96964.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.89 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 56 degrees of freedom
# Null hypothesis probability = 4.417254e-01
Photon flux (15-150 keV) in 748.5 sec: 2.15528E-02 ( -0.0051664 0.0053012 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.63402e-07 ( -1.60896e-07 1.72216e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
213.000000 744.440000
746.000000 963.018900
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -2.87379 -5 )
beta : -9.37167 ( 9.37167 18.8767 )
Epeak [keV] : 27.1726 ( -3.58894 3.8827 )
Norm@50keV : 21.2086 ( -5.15146 35.6176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.501339e-01
Photon flux (15-150 keV) in 748.5 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] : 6.73218 (-1.20433 1.48896)
R^2/D10^2 : 5.59078E-02 (-0.0323492 0.0720627)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.91 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.051148e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.921e-07 1.724e-07
25- 50 3.704e-07 2.246e-07
50-150 5.319e-08 4.514e-08
15-150 7.157e-07 4.371e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5910 (-10.8725 24.5319)
Norm : 0.194488 (-0.0827405 0.142445)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.08 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.494926e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.831e-07 1.196e-07
25- 50 3.084e-07 1.801e-07
50-150 1.509e-07 1.255e-07
15-150 7.424e-07 4.225e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 ( )
R1^2/D10^2 : 4.47856E-07 (-4.68413e-07 0.00160728)
kT2 [keV] : 6.66103 (-1.20677 1.49677)
R2^2/D10^2 : 5.78406E-02 (-0.0336596 0.0757433)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.91 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.70 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.430585e-01
# Null hypothesis probability = 2.489513e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.923e-07 3.075e+01
25- 50 3.701e-07 2.529e+02
50-150 5.299e-08 6.025e+03
15-150 7.154e-07 6.920e+03
Peak spectrum fit
Power-law model
Time interval is from 746.000 sec. to 963.019 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.41762 ( -0.493063 0.589126 )
Norm@50keV : 1.15216E-04 ( -4.9637e-05 5.22093e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.44 using 59 PHA bins.
# Reduced chi-squared = 1.253 for 57 degrees of freedom
# Null hypothesis probability = 9.451039e-02
Photon flux (15-150 keV) in 748.5 sec: 2.15468E-02 ( -0.00619924 0.00623631 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.46426e-07 ( -2.89964e-07 3.20794e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 746.000 sec. to 963.019 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -8.54780 ( )
Epeak [keV] : 27.0513 ( -2.95525 3.20913 )
Norm@50keV : 7517.99 ( -8682.32 96964.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.89 using 59 PHA bins.
# Reduced chi-squared = 1.016 for 56 degrees of freedom
# Null hypothesis probability = 4.417254e-01
Photon flux (15-150 keV) in 748.5 sec: 2.15528E-02 ( -0.0051664 0.0053012 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.63402e-07 ( -1.60896e-07 1.72216e-07 ) ergs/cm2
Band function
Time interval is from 746.000 sec. to 963.019 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 5.00000 ( -2.87379 -5 )
beta : -9.37167 ( 9.37167 18.8767 )
Epeak [keV] : 27.1726 ( -3.58894 3.8827 )
Norm@50keV : 21.2086 ( -5.15146 35.6176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 58.44 using 59 PHA bins.
# Reduced chi-squared = 1.063 for 55 degrees of freedom
# Null hypothesis probability = 3.501339e-01
Photon flux (15-150 keV) in 748.5 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] : 6.73218 (-1.20433 1.48896)
R^2/D10^2 : 5.59078E-02 (-0.0323492 0.0720627)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.91 using 59 PHA bins.
# Reduced chi-squared = 1.086 for 57 degrees of freedom
# Null hypothesis probability = 3.051148e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.921e-07 1.606e-07
25- 50 3.704e-07 2.365e-07
50-150 5.319e-08 4.521e-08
15-150 7.157e-07 4.120e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 27.5910 (-10.8725 24.5319)
Norm : 0.194488 (-0.0827405 0.142445)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.08 using 59 PHA bins.
# Reduced chi-squared = 1.194 for 57 degrees of freedom
# Null hypothesis probability = 1.494926e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.831e-07 1.361e-07
25- 50 3.084e-07 1.759e-07
50-150 1.509e-07 1.232e-07
15-150 7.424e-07 4.330e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 199.363 ( )
R1^2/D10^2 : 4.47856E-07 (-4.68413e-07 0.00160728)
kT2 [keV] : 6.66103 (-1.20677 1.49677)
R2^2/D10^2 : 5.78406E-02 (-0.0336596 0.0757433)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 61.91 using 59 PHA bins.
#Fit statistic : Chi-Squared = 61.70 using 59 PHA bins.
# Reduced chi-squared = 1.126 for 55 degrees of freedom
# Reduced chi-squared = 1.122 for 55 degrees of freedom
# Null hypothesis probability = 2.430585e-01
# Null hypothesis probability = 2.489513e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.923e-07 3.438e+01
25- 50 3.701e-07 2.457e+02
50-150 5.299e-08 6.553e+03
15-150 7.154e-07 6.998e+03
Plot creation:
Sat Oct 5 08:02:47 EDT 2013