batgrbproduct Analysis for Trigger=548927

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Feb 17 17:23:46 EST 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger548927/GCN5_download_cron
======================================================================

  Trigger: 00548927      Segment: 000

  BAT Trigger Time: 382745734.848   [s; MET]
      Trigger Stop: 382745735.872   [s; MET]
               UTC: 2013-02-16T22:15:24.622820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 67.8981836700403   Dec: 14.6647956247236  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    20.84
     Image Trigger?:     NO
     Rate S/N Ratio:     59.9499791492875  [ if not an image trigger ]
     Image S/N Ratio:    20.84

  Flight Position:   [ source = BAT ]
    RA: 67.8981836700403   Dec: 14.6647956247236  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 67.9007542973678   Dec: 14.6695417988206  [deg; J2000]  
        { 04h 31m 36.2s , +14d 40' 10.4" }
         +/- 0.646439842787822 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.164330598903334 [arcmin] (formal 1-sigma fit error)
    SNR: 56.7273505110147
 
  Angular difference between Flight and Ground position is 0.321494 arcmin
 
  Partial Coding Fraction: 0.546875    [ including projection effects ]

  Duration
     T90: 6.51199996471405 +/- 1.08621174877495
        Measured from: -3.2639998793602
                   to: 3.24800008535385     [s; relative to TRIGTIME]
     T50: 3.69999998807907 +/- 0.17181385542362
        Measured from: -1.61999988555908
                   to: 2.08000010251999     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.11199998855591     
                   to: 2.11199998855591     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.1599999666214     
                   to: 4.30800002813339     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.944319   1.635460   1.427867   0.362038
           0.029594   0.033368   0.030943   0.023320 [error]
 Peak      0.125663   0.261566   0.311588   0.115984
           0.009706   0.011926   0.012447   0.009133 [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 3.47e-07 6.99e-07 1.10e-06 3.80e-06 3.05e-06 5.94e-06   erg/cm2
              Error 1.73e-08 2.08e-08 3.18e-08 2.48e-07 8.02e-08 2.65e-07   erg/cm2
Peak flux Power-law 1.38e+00 1.92e+00 1.98e+00 3.73e+00 6.47e+00 9.02e+00   ph/cm2/s
              Error 1.31e-01 1.12e-01 9.72e-02 3.92e-01 3.05e-01 4.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.02e-07 7.22e-07 1.16e-06 2.01e-06 2.97e-06 4.19e-06   erg/cm2
              Error 2.21e-08 2.30e-08 3.82e-08 4.13e-07 8.61e-08 4.13e-07   erg/cm2
Peak flux Cutoff-PL 1.24e+00 1.96e+00 2.08e+00 2.58e+00 6.39e+00 7.86e+00   ph/cm2/s
              Error 1.68e-01 1.21e-01 1.28e-01 7.71e-01 3.11e-01 8.20e-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    1.350    0.044    -      -           2.99e-02 7.48e-04   72.980 57
CPL   0.802    0.195     123.7   27.1      5.26e-02 1.04e-02   47.170 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.957    0.079    -      -           5.63e-02 2.62e-03   69.840 57
CPL   0.561    0.332     214.5  317.1      8.38e-02 2.79e-02   65.320 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: 6.016000 sec.
T50 in the 50-300 keV band: 2.688000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   10.468   -6.160    4.308
T90     6.512   -3.264    3.248
T50     3.700   -1.620    2.080
Peak    1.000    1.112    2.112

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   67.9008 +14.6695 0.0034   32.6  -48.1       4.5510    56.7  TRIG_00548927       
------------------------------------------
 
Foreground time interval of the image:
 -6.160   4.308 (delta_t =  10.468 [sec])
Background time interval of the image:
-168.547  -6.160 (delta_t = 162.387 [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   -6.160 sec. to    4.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35003     ( -0.0444043   0.0443225 )
Norm@50keV  : 2.98688E-02    ( -0.000748194   0.000748093 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.98 using 59 PHA bins.
# Reduced chi-squared =          1.280 for     57 degrees of freedom 
# Null hypothesis probability =   7.535956e-02
 
Photon flux (15-150 keV)    in 10.47 sec: 3.59835 ( -0.0980735  0.0982848 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.05431e-06 ( -8.01475e-08  8.02197e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.160 sec. to    4.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.802049     ( -0.199147   0.190874 )
Epeak [keV] : 123.657      ( -18.6273 35.5043 )
Norm@50keV  : 5.25637E-02    ( -0.00917034   0.0116172 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.17 using 59 PHA bins.
# Reduced chi-squared =         0.8423 for     56 degrees of freedom 
# Null hypothesis probability =   7.935463e-01
 
Photon flux (15-150 keV)    in 10.47 sec: 3.48267 ( -0.10436  0.10471 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.97314e-06 ( -8.63042e-08  8.58121e-08 ) ergs/cm2
 
Band function
Time interval is from   -6.160 sec. to    4.308 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.323054   ( -0.667928   0.984763 )
beta        : -1.57752    ( 1.57614   0.111716 )
Epeak [keV] : 74.8919      ( -24.302 81.512 )
Norm@50keV   : 0.100653    ( -0.0600395   0.335217 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.90 using 59 PHA bins.
# Reduced chi-squared =         0.8527 for     55 degrees of freedom 
# Null hypothesis probability =   7.732928e-01
 
Photon flux (15-150 keV)    in 10.47 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]    : 18.3032  (  )
R^2/D10^2   : 0.213430  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         273.93 using 59 PHA bins.
# Reduced chi-squared =         4.8057 for     57 degrees of freedom 
# Null hypothesis probability =   4.094698e-30
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.491e-07   7.486e-09
25- 50  6.980e-07   2.288e-08
50-150  1.704e-06   7.381e-08
15-150  2.552e-06   7.643e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 15.2162       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         126.38 using 59 PHA bins.
# Reduced chi-squared =         2.2172 for     57 degrees of freedom 
# Null hypothesis probability =   3.596203e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.967e-07   1.105e-08
25- 50  7.631e-07   2.031e-08
50-150  1.674e-06   4.607e-08
15-150  2.833e-06   7.329e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.74346        (-0.956858      1.02734)
R1^2/D10^2  : 1.45972        (-0.397068      0.612832)
kT2 [keV]   : 29.4556        (-2.81355      3.92112)
R2^2/D10^2  : 3.30477E-02    (-0.0120687   0.0151306)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.00 using 59 PHA bins.
# Reduced chi-squared =         0.8546 for     55 degrees of freedom 
# Null hypothesis probability =   7.699349e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.714e-07   2.555e-08
25- 50  7.454e-07   4.905e-08
50-150  1.953e-06   1.602e-07
15-150  2.970e-06   2.073e-07

Peak spectrum fit

Power-law model
Time interval is from    1.112 sec. to    2.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.956691     ( -0.0789364   0.0780959 )
Norm@50keV  : 5.62920E-02    ( -0.00262157   0.00261684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.84 using 59 PHA bins.
# Reduced chi-squared =          1.225 for     57 degrees of freedom 
# Null hypothesis probability =   1.182404e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.46874 ( -0.30458  0.304834 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.18317e-07 ( -3.06672e-08  3.0776e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.112 sec. to    2.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.561379     ( -0.344005   0.319351 )
Epeak [keV] : 214.533      ( -72.8295 561.336 )
Norm@50keV  : 8.38205E-02    ( -0.0225978   0.0332749 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.32 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     56 degrees of freedom 
# Null hypothesis probability =   1.845511e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.38729 ( -0.31137  0.31152 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.10747e-07 ( -3.1998e-08  3.1848e-08 ) ergs/cm2
 
Band function
Time interval is from    1.112 sec. to    2.112 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99997   ( -4.99997   -4.99997 )
beta        : -1.00353    ( -0.086995   0.0865333 )
Epeak [keV] : 28.6610      ( -28.661 5.07919 )
Norm@50keV   : 1651.88    ( -75.3167   8.15241e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.08 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     55 degrees of freedom 
# Null hypothesis probability =   9.600839e-02
 
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]    : 22.8490  (  )
R^2/D10^2   : 0.211907  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         125.17 using 59 PHA bins.
# Reduced chi-squared =         2.1960 for     57 degrees of freedom 
# Null hypothesis probability =   5.085599e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.011e-08   1.855e-09
25- 50  1.087e-07   7.300e-09
50-150  4.240e-07   2.990e-08
15-150  5.529e-07   3.205e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 25.9503       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         219.64 using 59 PHA bins.
# Reduced chi-squared =         3.8533 for     57 degrees of freedom 
# Null hypothesis probability =   6.157647e-21
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.462e-08   3.150e-09
25- 50  1.243e-07   6.450e-09
50-150  2.726e-07   4.690e-08
15-150  4.615e-07   3.400e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.48495        (-2.27183      2.86376)
R1^2/D10^2  : 1.58024        (-0.751914      1.87207)
kT2 [keV]   : 35.6208        (-6.05869      14.3168)
R2^2/D10^2  : 4.48869E-02    (-0.0291278   0.0390167)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.76 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     55 degrees of freedom 
# Null hypothesis probability =   1.329339e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.634e-08   8.710e-09
25- 50  1.178e-07   2.592e-08
50-150  4.599e-07   1.133e-07
15-150  6.140e-07   1.331e-07
Plot creation:
Sun Feb 17 21:01:14 EST 2013