batgrbproduct Analysis for Trigger=595141

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Apr  9 09:38:28 EDT 2014
             Host Name: bat1
   Current Working Dir: /net/raid16/prebascript_archive/trigger595141/batgroup_hand_proc
======================================================================

  Trigger: 00595141      Segment: 000

  BAT Trigger Time: 418655766.656   [s; MET]
      Trigger Stop: 418655768.704   [s; MET]
               UTC: 2014-04-08T13:15:54.794960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 290.684540061204   Dec: -12.578173144477  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.83
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7046999107196  [ if not an image trigger ]
     Image S/N Ratio:    7.83

  Flight Position:   [ source = BAT ]
    RA: 290.684540061204   Dec: -12.578173144477  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 290.7229854884   Dec: -12.5854802208005  [deg; J2000]  
        { 19h 22m 53.5s , -12d 35' 07.7" }
         +/- 1.92680269507966 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.933704679054798 [arcmin] (formal 1-sigma fit error)
    SNR: 11.9181275726259
 
  Angular difference between Flight and Ground position is 2.293624 arcmin
 
  Partial Coding Fraction: 0.4023438    [ including projection effects ]

  Duration
     T90: 4 +/- 1.4142135623731
        Measured from: -0.656000018119812
                   to: 3.34399998188019     [s; relative to TRIGTIME]
     T50: 1 +/- 1.4142135623731
        Measured from: 0.343999981880188
                   to: 1.34399998188019     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.343999981880188     
                   to: 1.34399998188019     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.656000018119812     
                   to: 3.34399998188019     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.126967   0.150400   0.160777   0.028680
           0.023492   0.022503   0.019277   0.018979 [error]
 Peak      0.041029   0.047262   0.038343   0.009732
           0.011973   0.011373   0.009696   0.009407 [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 4.11e-08 7.60e-08 1.08e-07 3.25e-07 3.09e-07 5.50e-07   erg/cm2
              Error 1.06e-08 1.17e-08 1.95e-08 1.30e-07 4.75e-08 1.43e-07   erg/cm2
Peak flux Power-law 4.18e-01 3.91e-01 2.55e-01 2.56e-01 1.17e+00 1.32e+00   ph/cm2/s
              Error 1.70e-01 1.03e-01 7.98e-02 1.61e-01 3.01e-01 3.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.79e-08 7.85e-08 1.12e-07 3.01e-07 0.00e+00 0.00e+00   erg/cm2
              Error 1.32e-08 1.37e-08 2.19e-08 5.13e-08 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 3.56e-01 4.51e-01 2.60e-01 6.26e-02 1.12e+00 1.13e+00   ph/cm2/s
              Error 1.90e-01 1.43e-01 9.58e-02 1.89e-01 3.08e-01 2.62e-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    1.490    0.255    -      -           8.12e-03 1.16e-03   51.450 57
CPL   1.099    0.941     121.9    0.0      1.25e-02 0.00e+00   51.030 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared 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    1.620    0.416    -      -           9.04e-03 2.32e-03   67.860 57
CPL   0.306    2.424      57.3  -21.8      4.80e-02 1.65e+00   66.420 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: 4.544000 sec.
T50 in the 50-300 keV band: 2.240000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    4.000   -0.656    3.344
T90     4.000   -0.656    3.344
T50     1.000    0.344    1.344
Peak    1.000    0.344    1.344

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  290.7230   -12.5855   0.0162    40.3270  -142.3019         0.5259895     11.918 TRIG_00595141                 
 
Foreground time interval of the image:
 -0.656   3.344 (delta_t =   4.000 [sec])
Background time interval of the image:
-179.656  -0.656 (delta_t = 179.000 [sec])

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   -0.656 sec. to    3.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49018     ( -0.254243   0.254778 )
Norm@50keV  : 8.12393E-03    ( -0.00115798   0.00115466 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.45 using 59 PHA bins.
# Reduced chi-squared =         0.9026 for     57 degrees of freedom 
# Null hypothesis probability =   6.826291e-01
 
Photon flux (15-150 keV)    in 4 sec: 1.01153 ( -0.14994  0.15075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08772e-07 ( -4.72492e-08  4.77024e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.656 sec. to    3.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09862     ( -1.25742   0.624044 )
Epeak [keV] : 121.871      ( -121.868 -121.868 )
Norm@50keV  : 1.25117E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9112 for     56 degrees of freedom 
# Null hypothesis probability =   6.631410e-01
 
Photon flux (15-150 keV)    in 4 sec: 0.989846 ( -0.161656  0.237334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.01417e-07 ( -5.13452e-08  5.132e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.656 sec. to    3.344 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.10081   ( 1.16567   0.713622 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 122.128      ( -52.4507 -122.128 )
Norm@50keV   : 1.24852E-02    ( -0.00367421   0.00306813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9278 for     55 degrees of freedom 
# Null hypothesis probability =   6.271485e-01
 
Photon flux (15-150 keV)    in 4 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]    : 16.5347  (-2.5509  3.19092)
R^2/D10^2   : 8.16000E-02  (-0.0379308   0.0663808)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.21 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.948003e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.831e-08   6.096e-09
25- 50  7.920e-08   1.972e-08
50-150  1.532e-07   4.420e-08
15-150  2.507e-07   5.452e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-81.4313      -199.363)
Norm        : 4.16029       (-0.586267     0.586391)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.38 using 59 PHA bins.
# Reduced chi-squared =         0.9015 for     57 degrees of freedom 
# Null hypothesis probability =   6.848414e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.144e-08   2.344e-08
25- 50  7.971e-08   4.396e-08
50-150  1.748e-07   9.610e-08
15-150  2.960e-07   1.664e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.64369        (-1.36975      2.91121)
R1^2/D10^2  : 13.7274        (-12.7397      193.222)
kT2 [keV]   : 19.7448        (-3.64141      5.77872)
R2^2/D10^2  : 4.04819E-02    (-0.0245614   0.0328057)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.07 using 59 PHA bins.
# Reduced chi-squared =         0.8922 for     55 degrees of freedom 
# Null hypothesis probability =   6.995108e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.342e-08   2.278e-08
25- 50  6.896e-08   2.619e-08
50-150  1.743e-07   6.116e-08
15-150  2.867e-07   8.806e-08

Peak spectrum fit

Power-law model
Time interval is from    0.344 sec. to    1.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62019     ( -0.414424   0.416715 )
Norm@50keV  : 9.03967E-03    ( -0.00233256   0.00230857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.86 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     57 degrees of freedom 
# Null hypothesis probability =   1.537287e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.16901 ( -0.29948  0.301542 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.43422e-08 ( -2.25656e-08  2.30734e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.344 sec. to    1.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.306052     ( -3.25246   1.59505 )
Epeak [keV] : 57.2677      ( -13.6527 -57.2076 )
Norm@50keV  : 4.79649E-02    ( -0.0481887   3.25645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.42 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     56 degrees of freedom 
# Null hypothesis probability =   1.606560e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.11676 ( -0.306127  0.31008 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.48073e-08 ( -2.40787e-08  2.65097e-08 ) ergs/cm2
 
Band function
Time interval is from    0.344 sec. to    1.344 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5.67909   -5 )
beta        : -1.95456    ( -0.882513   0.531714 )
Epeak [keV] : 28.3638      ( -9.08333 10.141 )
Norm@50keV   : 541.293    ( -129.14   5367.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.44 using 59 PHA bins.
# Reduced chi-squared =          1.172 for     55 degrees of freedom 
# Null hypothesis probability =   1.798989e-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]    : 12.3614  (-2.8867  4.14296)
R^2/D10^2   : 0.269072  (-0.178607   0.454304)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.68 using 59 PHA bins.
# Reduced chi-squared =          1.187 for     57 degrees of freedom 
# Null hypothesis probability =   1.572924e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.713e-09   4.461e-09
25- 50  2.838e-08   1.297e-08
50-150  2.658e-08   1.577e-08
15-150  6.368e-08   2.597e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 147.891       (-87.9001      -145.35)
Norm        : 4.89093       (-1.30726     2.04329)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.07 using 59 PHA bins.
# Reduced chi-squared =          1.177 for     57 degrees of freedom 
# Null hypothesis probability =   1.700191e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.258e-08   7.330e-09
25- 50  2.326e-08   1.341e-08
50-150  4.565e-08   2.842e-08
15-150  8.149e-08   4.851e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.42023        (-9.48656      4.62649)
R1^2/D10^2  : 0.587903        (-0.577875      -0.577875)
kT2 [keV]   : 38.3132        (-39.6147      -39.6147)
R2^2/D10^2  : 2.74960E-03    (-0.00248563   0.385878)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.34 using 59 PHA bins.
# Reduced chi-squared =          1.188 for     55 degrees of freedom 
# Null hypothesis probability =   1.604560e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.092e-08   6.835e-09
25- 50  2.728e-08   1.624e-08
50-150  4.310e-08   2.296e-08
15-150  8.129e-08   4.102e-08
Plot creation:
Wed Apr  9 10:06:46 EDT 2014