batgrbproduct Analysis for Trigger=638946

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Apr 25 11:16:43 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger638946/GCN5_download_cron
======================================================================

  Trigger: 00638946      Segment: 000

  BAT Trigger Time: 451554190.564   [s; MET]
      Trigger Stop: 451554190.628   [s; MET]
               UTC: 2015-04-24T07:42:57.075440    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 152.312128050396   Dec: -26.6466164433475  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.22
     Image Trigger?:     NO
     Rate S/N Ratio:     250.966133173383  [ if not an image trigger ]
     Image S/N Ratio:    15.22

  Flight Position:   [ source = BAT ]
    RA: 152.312128050396   Dec: -26.6466164433475  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 152.304836738167   Dec: -26.6461138519022  [deg; J2000]  
        { 10h 09m 13.2s , -26d 38' 46.0" }
         +/- 0.875250267847695 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.218886270488057 [arcmin] (formal 1-sigma fit error)
    SNR: 36.7948122245624
 
  Angular difference between Flight and Ground position is 0.392176 arcmin
 
  Partial Coding Fraction: 0.6953125    [ including projection effects ]

  Duration
     T90: 90.9719999432564 +/- 22.1240361727103
        Measured from: -0.0199998617172241
                   to: 90.9520000815392     [s; relative to TRIGTIME]
     T50: 4.3199999332428 +/- 25.7340199230362
        Measured from: 0.0920001268386841
                   to: 4.41200006008148     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0559999942779541     
                   to: 0.944000005722046     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0559999942779541     
                   to: 106.324000000954     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.461293   0.699681   0.768858   0.315845
           0.062039   0.064458   0.056852   0.048643 [error]
 Peak      0.245711   0.450130   0.618419   0.279441
           0.011849   0.015352   0.017901   0.015679 [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 1.50e-07 3.26e-07 5.57e-07 2.19e-06 1.53e-06 3.23e-06   erg/cm2
              Error 2.58e-08 3.28e-08 5.41e-08 4.98e-07 1.37e-07 5.24e-07   erg/cm2
Peak flux Power-law 2.22e+00 3.39e+00 3.89e+00 8.51e+00 1.20e+01 1.80e+01   ph/cm2/s
              Error 1.70e-01 1.55e-01 1.39e-01 6.90e-01 4.15e-01 7.36e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.52e-07 3.28e-07 5.55e-07 2.14e-06 1.52e-06 3.17e-06   erg/cm2
              Error 2.61e-08 3.26e-08 5.44e-08 7.29e-07 1.35e-07 5.37e-07   erg/cm2
Peak flux Cutoff-PL 2.22e+00 3.39e+00 3.89e+00 8.45e+00 1.20e+01 1.80e+01   ph/cm2/s
              Error 1.99e-01 9.64e-02 1.62e-01 1.13e+00 4.13e-01 1.31e+00   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.226    0.154    -      -           1.42e-03 1.19e-04   54.410 57
CPL   1.228    0.155    9999.4    0.0      1.43e-03 3.61e-04   54.440 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.805    0.062    -      -           1.05e-01 3.67e-03   48.800 57
CPL   0.797    0.063    9998.7    0.0      1.05e-01 1.58e-02   48.800 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: 0.320000 sec.
T50 in the 50-300 keV band: 0.192000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  106.380   -0.056  106.324
T90    90.972   -0.020   90.952
T50     4.320    0.092    4.412
Peak    1.000   -0.056    0.944

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  152.3048 -26.6461 0.0052   34.1 -175.2       1.6865    36.8  TRIG_00638946       
------------------------------------------
 
Foreground time interval of the image:
 -0.056   6.737 (delta_t =   6.793 [sec])
Background time interval of the image:
-239.564  -0.056 (delta_t = 239.508 [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   -0.056 sec. to  106.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22630     ( -0.155636   0.152644 )
Norm@50keV  : 1.42472E-03    ( -0.000119352   0.000119133 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.41 using 59 PHA bins.
# Reduced chi-squared =         0.9546 for     57 degrees of freedom 
# Null hypothesis probability =   5.727680e-01
 
Photon flux (15-150 keV)    in 106.4 sec: 0.167878 ( -0.0149111  0.0149561 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.52679e-06 ( -1.37006e-07  1.37489e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.056 sec. to  106.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22765     ( -0.162026   0.148338 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.43163E-03    ( -0.00011922   0.000603658 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.44 using 59 PHA bins.
# Reduced chi-squared =         0.9721 for     56 degrees of freedom 
# Null hypothesis probability =   5.341338e-01
 
Photon flux (15-150 keV)    in 106.4 sec: 0.168219 ( -0.014916  0.014586 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.52257e-06 ( -1.32872e-07  1.37511e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.056 sec. to  106.324 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.926607   ( 0.92617   0.92617 )
beta        : -1.22671    ( 1.22665   0.156094 )
Epeak [keV] : 63.3020      ( -63.1219 -63.1219 )
Norm@50keV   : 2.62707E-03    ( -0.00116958   80453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.41 using 59 PHA bins.
# Reduced chi-squared =         0.9893 for     55 degrees of freedom 
# Null hypothesis probability =   4.971635e-01
 
Photon flux (15-150 keV)    in 106.4 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]    : 20.2716  (-2.39052  2.85138)
R^2/D10^2   : 7.12499E-03  (-0.00250037   0.00370322)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          96.12 using 59 PHA bins.
# Reduced chi-squared =          1.686 for     57 degrees of freedom 
# Null hypothesis probability =   9.203215e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.973e-08   1.135e-08
25- 50  3.002e-07   4.075e-08
50-150  9.161e-07   1.266e-07
15-150  1.276e-06   1.330e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.706679       (-0.0600836     0.060073)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.97 using 59 PHA bins.
# Reduced chi-squared =          1.228 for     57 degrees of freedom 
# Null hypothesis probability =   1.160858e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.872e-07   2.123e-08
25- 50  3.601e-07   1.287e-07
50-150  7.898e-07   2.995e-07
15-150  1.337e-06   3.587e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.03535        (-1.78613      2.60946)
R1^2/D10^2  : 0.159656        (-0.102461      0.309775)
kT2 [keV]   : 34.6460        (-8.00464      21.1895)
R2^2/D10^2  : 1.12083E-03    (-0.000820822   0.00146496)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.22 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     55 degrees of freedom 
# Null hypothesis probability =   4.663050e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.562e-07   6.817e-08
25- 50  3.207e-07   1.111e-07
50-150  1.083e-06   4.140e-07
15-150  1.560e-06   4.924e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.056 sec. to    0.944 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.804541     ( -0.0625151   0.061967 )
Norm@50keV  : 0.104697    ( -0.00367498   0.00365774 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.80 using 59 PHA bins.
# Reduced chi-squared =         0.8562 for     57 degrees of freedom 
# Null hypothesis probability =   7.717524e-01
 
Photon flux (15-150 keV)    in 1 sec: 12.0312 ( -0.414485  0.414806 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22115e-06 ( -4.5522e-08  4.5627e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.056 sec. to    0.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.797205     ( -0.063032   0.0624292 )
Epeak [keV] : 9998.66      ( -9998.67 -9998.67 )
Norm@50keV  : 0.105444    ( -0.00363749   0.0279024 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.80 using 59 PHA bins.
# Reduced chi-squared =         0.8714 for     56 degrees of freedom 
# Null hypothesis probability =   7.415170e-01
 
Photon flux (15-150 keV)    in 1 sec: 12.0280 ( -0.4138  0.4127 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22161e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.056 sec. to    0.944 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.910655   ( 0.910655   0.910655 )
beta        : -0.804540    ( -0.0619608   0.0625258 )
Epeak [keV] : 13.9206      ( -13.9206 -13.9206 )
Norm@50keV   : 0.153770    ( -0.0527962   2.4805e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.80 using 59 PHA bins.
# Reduced chi-squared =         0.8873 for     55 degrees of freedom 
# Null hypothesis probability =   7.089598e-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]    : 25.7534  (  )
R^2/D10^2   : 0.280210  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         175.12 using 59 PHA bins.
# Reduced chi-squared =         3.0723 for     57 degrees of freedom 
# Null hypothesis probability =   6.147126e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.177e-08   2.065e-09
25- 50  1.830e-07   9.500e-09
50-150  8.955e-07   4.585e-08
15-150  1.110e-06   4.750e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 46.5892       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         425.23 using 59 PHA bins.
# Reduced chi-squared =         7.4602 for     57 degrees of freedom 
# Null hypothesis probability =   9.392020e-58
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.160e-07   4.250e-09
25- 50  2.232e-07   7.900e-09
50-150  4.894e-07   1.945e-08
15-150  8.286e-07   3.285e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.30137        (-2.11712      2.7281)
R1^2/D10^2  : 2.93777        (-1.39259      3.4078)
kT2 [keV]   : 42.2678        (-7.17829      16.8028)
R2^2/D10^2  : 5.86110E-02    (-0.0345002   0.0431298)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.25 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     55 degrees of freedom 
# Null hypothesis probability =   3.567347e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.327e-08   1.057e-08
25- 50  2.024e-07   2.845e-08
50-150  9.659e-07   1.268e-07
15-150  1.231e-06   1.471e-07
Plot creation:
Sat Apr 25 11:20:34 EDT 2015