batgrbproduct Analysis for Trigger=558631
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): Thu Jun 20 17:07:43 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger558631/GCN5_download_cron
======================================================================
Trigger: 00558631 Segment: 000
BAT Trigger Time: 393387728 [s; MET]
Trigger Stop: 393388048 [s; MET]
UTC: 2013-06-20T02:21:57.305180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 271.804678125872 Dec: -22.2908994395319 [deg; J2000]
Catalogged Source?: YES
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 5.84
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 5.84
Flight Position: [ source = BAT ]
RA: 271.804678125872 Dec: -22.2908994395319 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 271.775860040956 Dec: -22.2963506146552 [deg; J2000]
{ 18h 07m 06.2s , -22d 17' 46.9" }
+/- 3.68342811967557 [arcmin] (estimated 90% radius based on SNR)
+/- 2.11321444308448 [arcmin] (formal 1-sigma fit error)
SNR: 4.72265985220172
Angular difference between Flight and Ground position is 1.632930 arcmin
Partial Coding Fraction: 0.8125 [ including projection effects ]
Duration
T90: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
T50: 320 +/-
Measured from: 0
to: 320 [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
Fluence
Peak Flux (peak 320 second)
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0
to: 320 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.461607 0.412284 0.135657 0.207384
0.136292 0.121883 0.101317 0.086210 [error]
Peak 0.461607 0.412284 0.135657 0.207384
0.136292 0.121883 0.101317 0.086210 [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 1.34e-07 1.65e-07 1.47e-07 2.27e-07 5.25e-07 6.73e-07 erg/cm2
Error 5.70e-08 5.57e-08 9.09e-08 3.28e-07 2.11e-07 4.10e-07 erg/cm2
Peak flux Power-law 1.38e-02 9.43e-03 4.21e-03 2.61e-03 2.87e-02 3.01e-02 ph/cm2/s
Error 6.00e-03 3.11e-03 2.51e-03 3.48e-03 9.17e-03 9.73e-03 ph/cm2/s
Fluence Cutoff-PL 1.35e-07 1.65e-07 1.46e-07 3.57e-08 1.57e-10 5.18e-07 erg/cm2
Error 5.70e-08 9.06e-08 1.07e-07 2.56e-07 4.27e-07 0.00e+00 erg/cm2
Peak flux Cutoff-PL 1.39e-02 9.41e-03 1.17e-02 1.11e-03 2.85e-06 2.87e-02 ph/cm2/s
Error 6.00e-03 3.17e-03 3.11e-03 9.17e-03 1.16e-02 0.00e+00 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 2.163 0.683 - - 1.77e-04 8.04e-05 55.160 57
CPL -2.145 0.000 28.5 0.0 1.75e-01 0.00e+00 54.670 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.163 0.683 - - 1.77e-04 8.04e-05 55.160 57
CPL -2.145 0.000 28.5 0.0 1.75e-01 0.00e+00 54.670 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 320.000 0.000 320.000
T90 320.000 0.000 320.000
T50 320.000 0.000 320.000
Peak 320.000 0.000 320.000
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
271.7759 -22.2964 0.0408 16.2 115.7 1.5326 4.7 TRIG_00558631
------------------------------------------
Foreground time interval of the image:
0.000 78.200 (delta_t = 78.200 [sec])
80.000 119.810 (delta_t = 39.810 [sec])
121.000 320.000 (delta_t = 199.000 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16318 ( -0.632691 0.732496 )
Norm@50keV : 1.76919E-04 ( -8.18179e-05 7.88842e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.444088e-01
Photon flux (15-150 keV) in 317 sec: 2.87342E-02 ( -0.00917377 0.00917381 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24727e-07 ( -2.00882e-07 2.21569e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14461 ( )
Epeak [keV] : 28.5086 ( -28.2983 -28.2983 )
Norm@50keV : 0.175360 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9762 for 56 degrees of freedom
# Null hypothesis probability = 5.254475e-01
Photon flux (15-150 keV) in 317 sec: 2.87313E-02 ( -0.0091792 0.0091639 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17579e-07 ( -2.87956e-07 2.2422e-07 ) ergs/cm2
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 78.200000
80.000000 119.810000
121.000000 320.000000
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50731 ( -4.50731 -4.50731 )
beta : -2.85645 ( 2.85645 1.07089 )
Epeak [keV] : 25.5421 ( -8.81878 8.5657 )
Norm@50keV : 14.0819 ( -4.39029 492058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178653e-01
Photon flux (15-150 keV) in 317 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] : 7.28973 (-1.89636 2.69088)
R^2/D10^2 : 4.73406E-02 (-0.0473406 0.118405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.620797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.334e-07 7.946e-08
25- 50 1.973e-07 1.217e-07
50-150 3.778e-08 3.238e-08
15-150 3.685e-07 2.303e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.1436 (-21.5298 131.118)
Norm : 0.188253 (-0.0935243 0.205822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 57 degrees of freedom
# Null hypothesis probability = 5.428943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 7.468e-08
25- 50 1.773e-07 1.103e-07
50-150 1.339e-07 1.117e-07
15-150 4.472e-07 2.727e-07
Double BB
R1^2/D10^2 : 3.36044E-06 ( )
kT2 [keV] : 6.65041 (-1.71914 2.34145)
R2^2/D10^2 : 6.49629E-02 (-0.0326346 0.0950224)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.94 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 55 degrees of freedom
# Reduced chi-squared = 0.9277 for 55 degrees of freedom
# Reduced chi-squared = 0.9261 for 55 degrees of freedom
# Null hypothesis probability = 4.875341e-01
# Null hypothesis probability = 6.272402e-01
# Null hypothesis probability = 6.306135e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.348e-07 8.347e-06
25- 50 1.949e-07 4.818e-05
50-150 4.862e-08 4.176e-04
15-150 3.783e-07 5.345e-04
Peak spectrum fit
Power-law model
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.16318 ( -0.632691 0.732496 )
Norm@50keV : 1.76919E-04 ( -8.18179e-05 7.88842e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.16 using 59 PHA bins.
# Reduced chi-squared = 0.9677 for 57 degrees of freedom
# Null hypothesis probability = 5.444088e-01
Photon flux (15-150 keV) in 317 sec: 2.87342E-02 ( -0.00917377 0.00917381 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.24727e-07 ( -2.00882e-07 2.21569e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: -2.14461 ( )
Epeak [keV] : 28.5086 ( -28.2983 -28.2983 )
Norm@50keV : 0.175360 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.67 using 59 PHA bins.
# Reduced chi-squared = 0.9762 for 56 degrees of freedom
# Null hypothesis probability = 5.254475e-01
Photon flux (15-150 keV) in 317 sec: 2.87313E-02 ( -0.0091792 0.0091639 ) ph/cm2/s
Energy fluence (15-150 keV) : 5.17579e-07 ( -2.87956e-07 2.2422e-07 ) ergs/cm2
Band function
Time interval is from 121.000 sec. to 320.000 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.50731 ( -4.50731 -4.50731 )
beta : -2.85645 ( 2.85645 1.07089 )
Epeak [keV] : 25.5421 ( -8.81878 8.5657 )
Norm@50keV : 14.0819 ( -4.39029 492058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.87 using 59 PHA bins.
# Reduced chi-squared = 0.9794 for 55 degrees of freedom
# Null hypothesis probability = 5.178653e-01
Photon flux (15-150 keV) in 317 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] : 7.28973 (-1.89636 2.69088)
R^2/D10^2 : 4.73406E-02 (-0.0473406 0.118405)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.69 using 59 PHA bins.
# Reduced chi-squared = 0.9595 for 57 degrees of freedom
# Null hypothesis probability = 5.620797e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.334e-07 8.353e-08
25- 50 1.973e-07 1.196e-07
50-150 3.778e-08 3.031e-08
15-150 3.685e-07 2.159e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 39.1436 (-21.5298 131.118)
Norm : 0.188253 (-0.0935243 0.205822)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.20 using 59 PHA bins.
# Reduced chi-squared = 0.9684 for 57 degrees of freedom
# Null hypothesis probability = 5.428943e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.360e-07 8.083e-08
25- 50 1.773e-07 1.124e-07
50-150 1.339e-07 1.039e-07
15-150 4.472e-07 2.726e-07
Double BB
R1^2/D10^2 : 3.36044E-06 ( )
kT2 [keV] : 6.65041 (-1.71914 2.34145)
R2^2/D10^2 : 6.49629E-02 (-0.0326346 0.0950224)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 54.66 using 59 PHA bins.
#Fit statistic : Chi-Squared = 51.02 using 59 PHA bins.
#Fit statistic : Chi-Squared = 50.94 using 59 PHA bins.
# Reduced chi-squared = 0.9938 for 55 degrees of freedom
# Reduced chi-squared = 0.9277 for 55 degrees of freedom
# Reduced chi-squared = 0.9261 for 55 degrees of freedom
# Null hypothesis probability = 4.875341e-01
# Null hypothesis probability = 6.272402e-01
# Null hypothesis probability = 6.306135e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.348e-07 8.332e-06
25- 50 1.949e-07 4.497e-05
50-150 4.862e-08 3.923e-04
15-150 3.783e-07 4.416e-04
Plot creation:
Thu Jun 20 17:27:24 EDT 2013