batgrbproduct Analysis for Trigger=625898

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Jan 16 07:02:30 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger625898/batgroup_hand_proc
======================================================================

  Trigger: 00625898      Segment: 000

  BAT Trigger Time: 443005736   [s; MET]
      Trigger Stop: 443006056   [s; MET]
               UTC: 2015-01-15T09:08:42.946100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 348.364066759657   Dec: 2.67911407641638  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.32
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.32

  Flight Position:   [ source = BAT ]
    RA: 348.364066759657   Dec: 2.67911407641638  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 348.367515821473   Dec: 2.69320350822157  [deg; J2000]  
        { 23h 13m 28.2s , +02d 41' 35.5" }
         +/- 3.13568315501778 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.54441758725103 [arcmin] (formal 1-sigma fit error)
    SNR: 5.94391265109322
 
  Angular difference between Flight and Ground position is 0.870273 arcmin
 
  Partial Coding Fraction: 1    [ 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     0.784181   0.426960  -0.033138  -0.003342
           0.086714   0.085772   0.074225   0.064164 [error]
 Peak      0.784181   0.426960  -0.033138  -0.003342
           0.086714   0.085772   0.074225   0.064164 [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 2.14e-07 1.47e-07 6.59e-08 4.11e-08 4.47e-07 4.68e-07   erg/cm2
              Error 3.95e-08 4.20e-08 3.87e-08 5.03e-08 1.09e-07 1.31e-07   erg/cm2
Peak flux Power-law 2.24e-02 8.64e-03 1.94e-03 5.24e-04 3.33e-02 3.35e-02   ph/cm2/s
              Error 4.19e-03 2.35e-03 1.10e-03 6.12e-04 6.09e-03 6.18e-03   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-07 1.60e-07 3.38e-08 1.45e-09 4.13e-07 4.13e-07   erg/cm2
              Error 4.21e-08 5.28e-08 4.50e-08 1.73e-08 1.00e-07 1.05e-07   erg/cm2
Peak flux Cutoff-PL 2.25e-02 9.54e-03 1.07e-03 2.52e-05 3.31e-02 3.31e-02   ph/cm2/s
              Error 4.45e-03 2.93e-03 1.33e-03 2.09e-04 5.91e-03 5.92e-03   ph/cm2/s
 
Fluence        Band 2.16e-07 1.60e-07 3.69e-08 2.08e-09 4.15e-07 4.15e-07   erg/cm2
              Error 4.15e-08 -------- -------- -------- 9.84e-08 --------   erg/cm2
Peak flux      Band 2.25e-02 9.58e-03 1.15e-03 -------- 3.32e-02 3.30e-02   ph/cm2/s
              Error 4.44e-03 2.93e-03 -------- -------- 5.91e-03 --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.156    0.495    -      -           1.08e-04 4.82e-05   55.360 57
CPL   1.506    0.000       8.5    0.0      1.65e-03 0.00e+00   53.250 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    3.156    0.495    -      -           1.08e-04 4.82e-05   55.360 57
CPL   1.506    0.000       8.5    0.0      1.65e-03 0.00e+00   53.250 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 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  348.3675     2.6932   0.0322     5.1681   110.3519         1.1219281      5.944 TRIG_00625898                 
 
Foreground time interval of the image:
  0.000 320.000 (delta_t = 320.000 [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  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.15608     ( -0.445356   0.545055 )
Norm@50keV  : 1.07809E-04    ( -4.4899e-05   5.1527e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.36 using 59 PHA bins.
# Reduced chi-squared =         0.9711 for     57 degrees of freedom 
# Null hypothesis probability =   5.370024e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.32895E-02 ( -0.00607008  0.00610325 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.47213e-07 ( -1.03795e-07  1.14505e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50556     (     )
Epeak [keV] : 8.52241      (   )
Norm@50keV  : 1.65081E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9509 for     56 degrees of freedom 
# Null hypothesis probability =   5.796067e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.31365E-02 ( -0.0058833  0.005942 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.13485e-07 ( -9.18048e-08  1.08307e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.62335   ( -3.0779   1.62338 )
beta        : -9.37167    ( 9.37167   19.3716 )
Epeak [keV] : 7.14173      ( -7.13469 14.3499 )
Norm@50keV   : 1.32716E-03    ( -0.000847235   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9684 for     55 degrees of freedom 
# Null hypothesis probability =   5.412853e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.31598E-02 ( 6.96684  -0.0059051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.14509e-07 ( -4.12269e-07  -9.1344e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.87301  (-0.948179  1.20814)
R^2/D10^2   : 0.319087  (-0.203162   0.591242)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.98 using 59 PHA bins.
# Reduced chi-squared =         0.9821 for     57 degrees of freedom 
# Null hypothesis probability =   5.133276e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.238e-07   8.136e-08
25- 50  1.371e-07   5.971e-08
50-150  4.914e-09   3.998e-09
15-150  3.658e-07   1.428e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 16.2398       (-5.28981      7.96674)
Norm        : 0.536903       (-0.210511     0.401416)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9344 for     57 degrees of freedom 
# Null hypothesis probability =   6.161452e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.183e-07   6.605e-08
25- 50  1.604e-07   6.738e-08
50-150  3.305e-08   2.600e-08
15-150  4.117e-07   1.458e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.33271        (-1.66      1.57492)
R1^2/D10^2  : 1.38754        (-1.13315      60.6149)
kT2 [keV]   : 8.56153        (-6.88736      7.56789)
R2^2/D10^2  : 1.47987E-02    (-0.0145219   0.205553)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.40 using 59 PHA bins.
# Reduced chi-squared =         0.9528 for     55 degrees of freedom 
# Null hypothesis probability =   5.744217e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.207e-07   1.137e-07
25- 50  1.611e-07   9.000e-08
50-150  4.224e-08   2.864e-08
15-150  4.240e-07   2.125e-07

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.15608     ( -0.445356   0.545055 )
Norm@50keV  : 1.07809E-04    ( -4.4899e-05   5.1527e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.36 using 59 PHA bins.
# Reduced chi-squared =         0.9711 for     57 degrees of freedom 
# Null hypothesis probability =   5.370024e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.32895E-02 ( -0.00607008  0.00610325 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.47213e-07 ( -1.03795e-07  1.14505e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  320.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50556     (     )
Epeak [keV] : 8.52241      (   )
Norm@50keV  : 1.65081E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9509 for     56 degrees of freedom 
# Null hypothesis probability =   5.796067e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.31365E-02 ( -0.0058833  0.005942 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.13485e-07 ( -9.18048e-08  1.08307e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  320.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.62335   ( -3.0779   1.62338 )
beta        : -9.37167    ( 9.37167   19.3716 )
Epeak [keV] : 7.14173      ( -7.13469 14.3499 )
Norm@50keV   : 1.32716E-03    ( -0.000847235   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9684 for     55 degrees of freedom 
# Null hypothesis probability =   5.412853e-01
 
Photon flux (15-150 keV)    in 320 sec: 3.31598E-02 ( 6.96684  -0.0059051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.14509e-07 ( -4.12269e-07  -9.1344e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.87301  (-0.948179  1.20814)
R^2/D10^2   : 0.319087  (-0.203162   0.591242)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.98 using 59 PHA bins.
# Reduced chi-squared =         0.9821 for     57 degrees of freedom 
# Null hypothesis probability =   5.133276e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.238e-07   9.328e-08
25- 50  1.371e-07   6.464e-08
50-150  4.914e-09   4.240e-09
15-150  3.658e-07   1.378e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 16.2398       (-5.28981      7.96674)
Norm        : 0.536903       (-0.210511     0.401416)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9344 for     57 degrees of freedom 
# Null hypothesis probability =   6.161452e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.183e-07   6.074e-08
25- 50  1.604e-07   5.979e-08
50-150  3.305e-08   2.659e-08
15-150  4.117e-07   1.199e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.33271        (-1.66      1.57492)
R1^2/D10^2  : 1.38754        (-1.13315      60.6149)
kT2 [keV]   : 8.56153        (-6.88736      7.56789)
R2^2/D10^2  : 1.47987E-02    (-0.0145219   0.205553)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.40 using 59 PHA bins.
# Reduced chi-squared =         0.9528 for     55 degrees of freedom 
# Null hypothesis probability =   5.744217e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.207e-07   1.127e-07
25- 50  1.611e-07   9.102e-08
50-150  4.224e-08   2.744e-08
15-150  4.240e-07   2.141e-07
Plot creation:
Fri Jan 16 07:20:00 EST 2015