batgrbproduct Analysis for Trigger=618673

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Nov 16 03:43:20 EST 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger618673/GCN5_download_cron
======================================================================

  Trigger: 00618673      Segment: 000

  BAT Trigger Time: 437735448   [s; MET]
      Trigger Stop: 437735512   [s; MET]
               UTC: 2014-11-15T09:10:35.209840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 233.023653384413   Dec: 32.69382955479  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.05

  Flight Position:   [ source = BAT ]
    RA: 233.023653384413   Dec: 32.69382955479  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 233.029244493403   Dec: 32.6470063404392  [deg; J2000]  
        { 15h 32m 07.0s , +32d 38' 49.2" }
         +/- 4.88504868710745 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.91516945334166 [arcmin] (formal 1-sigma fit error)
    SNR: 3.15514960344753
 
  Angular difference between Flight and Ground position is 2.823550 arcmin
 
  Partial Coding Fraction: 0.609375    [ 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     0.142593   0.334791   0.000793  -0.032679
           0.063671   0.066301   0.059988   0.058972 [error]
 Peak      0.142593   0.334791   0.000793  -0.032679
           0.063671   0.066301   0.059988   0.058972 [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 7.07e-08 8.38e-08 7.16e-08 1.05e-07 2.63e-07 3.44e-07   erg/cm2
              Error 2.90e-08 3.18e-08 4.46e-08 1.39e-07 1.14e-07 1.93e-07   erg/cm2
Peak flux Power-law 3.60e-02 2.38e-02 1.03e-02 6.10e-03 7.31e-02 7.64e-02   ph/cm2/s
              Error 1.50e-02 8.84e-03 6.15e-03 7.48e-03 2.62e-02 2.77e-02   ph/cm2/s
 
Fluence   Cutoff-PL 4.93e-08 1.53e-07 2.19e-08 1.17e-11 2.24e-07 2.24e-07   erg/cm2
              Error 3.30e-08 5.16e-08 3.76e-08 2.18e-09 7.71e-08 7.71e-08   erg/cm2
Peak flux Cutoff-PL 2.34e-02 4.37e-02 3.74e-03 1.08e-06 7.08e-02 7.08e-02   ph/cm2/s
              Error 1.65e-02 1.44e-02 5.87e-03 1.86e-04 2.40e-02 2.40e-02   ph/cm2/s
 
Fluence        Band 5.49e-08 1.48e-07 2.98e-08 2.85e-10 2.33e-07 2.33e-07   erg/cm2
              Error 2.66e-08 4.70e-08 -------- 1.91e-08 -------- --------   erg/cm2
Peak flux      Band 2.69e-02 4.20e-02 4.75e-03 2.24e-05 7.37e-02 7.37e-02   ph/cm2/s
              Error 1.35e-02 1.28e-02 -------- 1.63e-03 -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.175    0.593    -      -           4.48e-04 2.10e-04   74.230 57
CPL  -6.618    0.000      33.8    6.1      1.68e+02 0.00e+00   64.770 56
 
The chi2 of BB fit is 66.36 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    2.175    0.593    -      -           4.48e-04 2.10e-04   74.230 57
CPL  -6.618    0.000      33.8    6.1      1.68e+02 0.00e+00   64.770 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 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  233.0292 +32.6470 0.0606   38.1 -160.9       0.4544     3.2  TRIG_00618673       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

Lightcurves

Notes:

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:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17471     ( -0.558148   0.627871 )
Norm@50keV  : 4.48426E-04    ( -0.000212835   0.000207301 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.23 using 59 PHA bins.
# Reduced chi-squared =          1.302 for     57 degrees of freedom 
# Null hypothesis probability =   6.227552e-02
 
Photon flux (15-150 keV)    in 64 sec: 7.31372E-02 ( -0.0261615  0.0261387 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62979e-07 ( -1.09773e-07  1.1746e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.61827     (     )
Epeak [keV] : 33.7632      ( -5.16032 6.97238 )
Norm@50keV  : 168.091    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.77 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     56 degrees of freedom 
# Null hypothesis probability =   1.974186e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.07916E-02 ( -0.023415  0.0245999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.24367e-07 ( -7.29011e-08  8.13478e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.92762   ( -4.37611   -4.92762 )
beta        : -9.37167    ( 9.37167   19.3251 )
Epeak [keV] : 34.2080      ( -5.93957 6.32893 )
Norm@50keV   : 13.7382    ( -4.08223   40.6937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.86 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     55 degrees of freedom 
# Null hypothesis probability =   1.705782e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.36734E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33057e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.71921  (-1.91249  2.4683)
R^2/D10^2   : 7.02477E-02  (-0.070281   0.114247)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.36 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.855493e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.541e-08   3.901e-08
25- 50  1.322e-07   8.493e-08
50-150  4.573e-08   3.574e-08
15-150  2.433e-07   1.528e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 40.9232       (-19.0714      53.0282)
Norm        : 0.499844       (-0.215643     0.356317)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.15 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.841728e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.402e-08   4.539e-08
25- 50  9.834e-08   5.965e-08
50-150  7.798e-08   6.221e-08
15-150  2.503e-07   1.702e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.67434        (-8.71531      -8.71531)
R1^2/D10^2  : 1.26831E-02        (-0.0129231      -0.0129231)
kT2 [keV]   : 8.75303        (-8.72224      -8.72224)
R2^2/D10^2  : 5.68976E-02    (-0.057247   -0.057247)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.36 using 59 PHA bins.
# Reduced chi-squared =          1.207 for     55 degrees of freedom 
# Null hypothesis probability =   1.402919e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.516e-08   7.382e+00
25- 50  1.322e-07   5.958e+01
50-150  4.605e-08   1.368e+03
15-150  2.434e-07   1.457e+03

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17471     ( -0.558148   0.627871 )
Norm@50keV  : 4.48426E-04    ( -0.000212835   0.000207301 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.23 using 59 PHA bins.
# Reduced chi-squared =          1.302 for     57 degrees of freedom 
# Null hypothesis probability =   6.227552e-02
 
Photon flux (15-150 keV)    in 64 sec: 7.31372E-02 ( -0.0261615  0.0261387 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62979e-07 ( -1.09773e-07  1.1746e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.61827     (     )
Epeak [keV] : 33.7632      ( -5.16032 6.97238 )
Norm@50keV  : 168.091    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.77 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     56 degrees of freedom 
# Null hypothesis probability =   1.974186e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.07916E-02 ( -0.023415  0.0245999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.24367e-07 ( -7.29011e-08  8.13478e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.92762   ( -4.37611   -4.92762 )
beta        : -9.37167    ( 9.37167   19.3251 )
Epeak [keV] : 34.2080      ( -5.93957 6.32893 )
Norm@50keV   : 13.7382    ( -4.08223   40.6937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.86 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     55 degrees of freedom 
# Null hypothesis probability =   1.705782e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.36734E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33057e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.71921  (-1.91249  2.4683)
R^2/D10^2   : 7.02477E-02  (-0.070281   0.114247)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.36 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.855493e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.541e-08   4.154e-08
25- 50  1.322e-07   7.717e-08
50-150  4.573e-08   3.632e-08
15-150  2.433e-07   1.507e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 40.9232       (-19.0714      53.0282)
Norm        : 0.499844       (-0.215643     0.356317)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.15 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.841728e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.402e-08   4.284e-08
25- 50  9.834e-08   6.158e-08
50-150  7.798e-08   6.358e-08
15-150  2.503e-07   1.658e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.67434        (-8.71531      -8.71531)
R1^2/D10^2  : 1.26831E-02        (-0.0129231      -0.0129231)
kT2 [keV]   : 8.75303        (-8.72224      -8.72224)
R2^2/D10^2  : 5.68976E-02    (-0.057247   -0.057247)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.36 using 59 PHA bins.
# Reduced chi-squared =          1.207 for     55 degrees of freedom 
# Null hypothesis probability =   1.402919e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.516e-08   6.336e+00
25- 50  1.322e-07   5.782e+01
50-150  4.605e-08   1.355e+03
15-150  2.434e-07   1.539e+03
Plot creation:
Sun Nov 16 03:46:50 EST 2014