batgrbproduct Analysis for Trigger=558756
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 Jun 22 15:00:55 EDT 2013
Host Name: gcn5
Current Working Dir: /local/data/raid16/prebascript_archive/trigger558756/GCN5_download_cron
======================================================================
Trigger: 00558756 Segment: 000
BAT Trigger Time: 393561168 [s; MET]
Trigger Stop: 393561488 [s; MET]
UTC: 2013-06-22T02:32:37.297440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 308.349580794897 Dec: 41.2825424365573 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 11.04
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.04
Flight Position: [ source = BAT ]
RA: 308.349580794897 Dec: 41.2825424365573 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 308.37342832112 Dec: 41.3036148745363 [deg; J2000]
{ 20h 33m 29.6s , +41d 18' 13.0" }
+/- 2.38697822149451 [arcmin] (estimated 90% radius based on SNR)
+/- 1.15743255752053 [arcmin] (formal 1-sigma fit error)
SNR: 8.77677309225216
Angular difference between Flight and Ground position is 1.659617 arcmin
Partial Coding Fraction: 0.8203125 [ 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 1.192806 0.944536 0.121698 0.160820
0.117942 0.118459 0.101414 0.087533 [error]
Peak 1.192806 0.944536 0.121698 0.160820
0.117942 0.118459 0.101414 0.087533 [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 4.01e-07 3.61e-07 2.24e-07 2.12e-07 1.08e-06 1.20e-06 erg/cm2
Error 6.22e-08 6.10e-08 7.75e-08 1.35e-07 1.88e-07 2.62e-07 erg/cm2
Peak flux Power-law 4.38e-02 2.21e-02 6.85e-03 2.71e-03 7.42e-02 7.54e-02 ph/cm2/s
Error 6.95e-03 3.57e-03 2.29e-03 1.61e-03 9.92e-03 1.02e-02 ph/cm2/s
Fluence Cutoff-PL 4.01e-07 4.08e-07 6.89e-08 7.76e-10 8.78e-07 8.78e-07 erg/cm2
Error 6.80e-08 8.17e-08 9.24e-08 1.93e-08 1.51e-07 1.52e-07 erg/cm2
Peak flux Cutoff-PL 4.28e-02 2.55e-02 2.38e-03 1.46e-05 7.07e-02 7.07e-02 ph/cm2/s
Error 7.61e-03 4.85e-03 2.93e-03 3.15e-04 9.65e-03 9.65e-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 2.688 0.316 - - 3.35e-04 8.60e-05 76.080 57
CPL 0.105 2.679 21.2 0.0 2.25e-02 0.00e+00 71.540 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 2.688 0.316 - - 3.35e-04 8.60e-05 76.080 57
CPL 0.105 2.679 21.2 0.0 2.25e-02 0.00e+00 71.540 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
308.3734 +41.3036 0.0220 30.0 -168.3 2.3673 8.8 TRIG_00558756
------------------------------------------
Foreground time interval of the image:
0.000 303.060 (delta_t = 303.060 [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 0.000 sec. to 303.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.68774 ( -0.297912 0.333815 )
Norm@50keV : 3.35086E-04 ( -8.4849e-05 8.70533e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.08 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.645716e-02
Photon flux (15-150 keV) in 303.1 sec: 7.41817E-02 ( -0.00991957 0.00992549 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07587e-06 ( -1.82567e-07 1.92968e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 303.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.104718 ( -3.45673 1.90046 )
Epeak [keV] : 21.2066 ( )
Norm@50keV : 2.25158E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.54 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 56 degrees of freedom
# Null hypothesis probability = 7.882286e-02
Photon flux (15-150 keV) in 303.1 sec: 7.06660E-02 ( -0.0096138 0.009683 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.78435e-07 ( -1.37477e-07 1.64895e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 303.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.433195 ( -1.57548 0.416381 )
beta : -4.31350 ( 4.18091 1.42595 )
Epeak [keV] : 22.2683 ( -8.29966 5.53166 )
Norm@50keV : 5.50267E-02 ( -0.0539773 120.41 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.06 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 55 degrees of freedom
# Null hypothesis probability = 7.134815e-02
Photon flux (15-150 keV) in 303.1 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] : 6.14768 (-0.765514 0.855548)
R^2/D10^2 : 0.249054 (-0.107937 0.19786)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.09 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 57 degrees of freedom
# Null hypothesis probability = 8.591581e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.922e-07 8.531e-08
25- 50 4.122e-07 1.028e-07
50-150 4.166e-08 2.235e-08
15-150 8.461e-07 1.802e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.4150 (-5.56227 8.22904)
Norm : 0.791811 (-0.220945 0.325218)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.89 using 59 PHA bins.
# Reduced chi-squared = 1.279 for 57 degrees of freedom
# Null hypothesis probability = 7.632027e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.075e-07 7.062e-08
25- 50 3.881e-07 8.540e-08
50-150 1.399e-07 7.321e-08
15-150 9.354e-07 1.879e-07
Double BB
R1^2/D10^2 : 4.50296E-06 ( )
kT2 [keV] : 5.88729 (-0.709524 0.825107)
R2^2/D10^2 : 0.293161 (-0.129384 0.235922)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.35 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.44 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 55 degrees of freedom
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Reduced chi-squared = 1.189 for 55 degrees of freedom
# Null hypothesis probability = 6.821031e-02
# Null hypothesis probability = 1.584280e-01
# Null hypothesis probability = 1.592897e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.984e-07 2.102e-07
25- 50 4.119e-07 2.326e-07
50-150 6.144e-08 3.954e-08
15-150 8.717e-07 4.634e-07
Peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 303.060 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 2.68774 ( -0.297912 0.333815 )
Norm@50keV : 3.35086E-04 ( -8.4849e-05 8.70533e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 76.08 using 59 PHA bins.
# Reduced chi-squared = 1.335 for 57 degrees of freedom
# Null hypothesis probability = 4.645716e-02
Photon flux (15-150 keV) in 303.1 sec: 7.41817E-02 ( -0.00991957 0.00992549 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.07587e-06 ( -1.82567e-07 1.92968e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 303.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.104718 ( -3.45673 1.90046 )
Epeak [keV] : 21.2066 ( )
Norm@50keV : 2.25158E-02 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.54 using 59 PHA bins.
# Reduced chi-squared = 1.278 for 56 degrees of freedom
# Null hypothesis probability = 7.882286e-02
Photon flux (15-150 keV) in 303.1 sec: 7.06660E-02 ( -0.0096138 0.009683 ) ph/cm2/s
Energy fluence (15-150 keV) : 8.78435e-07 ( -1.37477e-07 1.64895e-07 ) ergs/cm2
Band function
Time interval is from 0.000 sec. to 303.060 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 0.433195 ( -1.57548 0.416381 )
beta : -4.31350 ( 4.18091 1.42595 )
Epeak [keV] : 22.2683 ( -8.29966 5.53167 )
Norm@50keV : 5.50267E-02 ( -0.0539773 120.41 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.06 using 59 PHA bins.
# Reduced chi-squared = 1.292 for 55 degrees of freedom
# Null hypothesis probability = 7.134815e-02
Photon flux (15-150 keV) in 303.1 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] : 6.14768 (-0.765514 0.855548)
R^2/D10^2 : 0.249054 (-0.107937 0.19786)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.09 using 59 PHA bins.
# Reduced chi-squared = 1.265 for 57 degrees of freedom
# Null hypothesis probability = 8.591581e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.922e-07 7.805e-08
25- 50 4.122e-07 9.786e-08
50-150 4.166e-08 2.215e-08
15-150 8.461e-07 1.585e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 22.4150 (-5.56227 8.22904)
Norm : 0.791811 (-0.220945 0.325218)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 72.89 using 59 PHA bins.
# Reduced chi-squared = 1.279 for 57 degrees of freedom
# Null hypothesis probability = 7.632027e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.075e-07 6.517e-08
25- 50 3.881e-07 8.328e-08
50-150 1.399e-07 7.567e-08
15-150 9.354e-07 1.849e-07
Double BB
R1^2/D10^2 : 4.50296E-06 ( )
kT2 [keV] : 5.88729 (-0.709524 0.825107)
R2^2/D10^2 : 0.293161 (-0.129384 0.235922)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 71.35 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.44 using 59 PHA bins.
#Fit statistic : Chi-Squared = 65.39 using 59 PHA bins.
# Reduced chi-squared = 1.297 for 55 degrees of freedom
# Reduced chi-squared = 1.190 for 55 degrees of freedom
# Reduced chi-squared = 1.189 for 55 degrees of freedom
# Null hypothesis probability = 6.821031e-02
# Null hypothesis probability = 1.584280e-01
# Null hypothesis probability = 1.592897e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.984e-07 2.061e-07
25- 50 4.119e-07 2.326e-07
50-150 6.144e-08 3.774e-08
15-150 8.717e-07 4.674e-07
Plot creation:
Sat Jun 22 15:14:34 EDT 2013