batgrbproduct Analysis for Trigger=548276

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Feb 11 09:56:08 EST 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger548276/GCN5_download_cron
======================================================================

  Trigger: 00548276      Segment: 000

  BAT Trigger Time: 382246602.368   [s; MET]
      Trigger Stop: 382246610.56   [s; MET]
               UTC: 2013-02-11T03:36:32.164500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 147.522617639919   Dec: -42.3387481449984  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.01
     Image Trigger?:     NO
     Rate S/N Ratio:     9.38083151964686  [ if not an image trigger ]
     Image S/N Ratio:    7.01

  Flight Position:   [ source = BAT ]
    RA: 147.522617639919   Dec: -42.3387481449984  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 147.52006246266   Dec: -42.3301798300395  [deg; J2000]  
        { 09h 50m 04.8s , -42d 19' 48.6" }
         +/- 2.12504366809846 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.872638146326584 [arcmin] (formal 1-sigma fit error)
    SNR: 10.3621532299256
 
  Angular difference between Flight and Ground position is 0.526442 arcmin
 
  Partial Coding Fraction: 0.40625    [ including projection effects ]

  Duration
     T90: 24.91999989748 +/- 6.40130267546355
        Measured from: -1.03199982643127
                   to: 23.8880000710487     [s; relative to TRIGTIME]
     T50: 9.8999999165535 +/- 6.75811128849419
        Measured from: 3.46400016546249
                   to: 13.364000082016     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -1.5799999833107     
                   to: -0.579999983310699     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.7039999961853     
                   to: 31.5240000486374     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.372112   0.446277   0.232749   0.012970
           0.051253   0.051165   0.043488   0.037053 [error]
 Peak      0.022345   0.035560   0.023744   0.006521
           0.008798   0.008815   0.007935   0.006378 [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 1.19e-07 1.84e-07 2.14e-07 4.79e-07 6.58e-07 9.96e-07   erg/cm2
              Error 2.42e-08 2.46e-08 4.30e-08 1.97e-07 1.01e-07 2.38e-07   erg/cm2
Peak flux Power-law 2.58e-01 2.52e-01 1.72e-01 1.83e-01 7.56e-01 8.66e-01   ph/cm2/s
              Error 1.19e-01 7.63e-02 6.25e-02 1.32e-01 2.21e-01 2.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.15e-07 1.91e-07 2.15e-07 2.90e-07 6.41e-07 8.11e-07   erg/cm2
              Error 2.64e-08 3.10e-08 4.52e-08 3.27e-07 1.11e-07 3.31e-07   erg/cm2
Peak flux Cutoff-PL 1.99e-01 2.80e-01 1.94e-01 6.43e-02 7.21e-01 7.38e-01   ph/cm2/s
              Error 1.44e-01 9.50e-02 7.75e-02 9.00e-02 2.30e-01 2.77e-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 2.21e-01 7.70e-01 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    1.781    0.238    -      -           2.15e-03 3.21e-04    0.000 57
CPL   1.486    0.889      78.7    0.0      3.12e-03 0.00e+00    0.000 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.554    0.479    -      -           5.96e-03 1.78e-03    0.000 57
CPL   0.240    2.673      69.3  -21.9      2.63e-02 8.31e-01    0.000 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   33.228   -1.704   31.524
T90    24.920   -1.032   23.888
T50     9.900    3.464   13.364
Peak    1.000   -1.580   -0.580

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  147.5201 -42.3302 0.0185   34.1   39.1       1.0820    10.4  TRIG_00548276       
------------------------------------------
 
Foreground time interval of the image:
 -1.704  31.524 (delta_t =  33.228 [sec])
Background time interval of the image:
-239.368  -1.704 (delta_t = 237.664 [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   -1.704 sec. to   31.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78137     ( -0.233106   0.241957 )
Norm@50keV  : 2.14821E-03    ( -0.000324289   0.00031746 )
------------------------------------------------------------
#Test statistic : Chi-Squared =          62.67 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.820841e-01
 
Photon flux (15-150 keV)    in 33.23 sec: 0.293908 ( -0.0396041  0.0396426 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.57658e-07 ( -1.00378e-07  1.02054e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.704 sec. to   31.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48602     ( -0.979684   0.798602 )
Epeak [keV] : 78.7446      (   )
Norm@50keV  : 3.12444E-03    (     )
------------------------------------------------------------
#Test statistic : Chi-Squared =          62.29 using 59 PHA bins.
# Reduced chi-squared =          1.112 for     56 degrees of freedom 
# Null hypothesis probability =   2.623255e-01
 
Photon flux (15-150 keV)    in 33.23 sec: 0.290787 ( -0.040521  0.040498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.40784e-07 ( -1.11271e-07  1.11643e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.704 sec. to   31.524 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48566   ( -4.18918   0.974673 )
beta        : -9.37106    ( 9.37155   19.3716 )
Epeak [keV] : 78.6971      ( -40.7751 -78.6971 )
Norm@50keV   : 3.12525E-03    ( -0.00125764   0.0040498 )
------------------------------------------------------------
#Test statistic : Chi-Squared =          62.29 using 59 PHA bins.
# Reduced chi-squared =          1.133 for     55 degrees of freedom 
# Null hypothesis probability =   2.327721e-01
 
Photon flux (15-150 keV)    in 33.23 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]    : 11.0678  (-1.79513  2.30195)
R^2/D10^2   : 9.42859E-02  (-0.0476845   0.0894158)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared =          77.01 using 59 PHA bins.
# Reduced chi-squared =          1.351 for     57 degrees of freedom 
# Null hypothesis probability =   3.992255e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.029e-08   2.057e-08
25- 50  2.288e-07   4.832e-08
50-150  1.591e-07   4.976e-08
15-150  4.682e-07   9.005e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 105.245       (-40.5801      -105.224)
Norm        : 1.28492       (-0.219628     0.285318)
------------------------------------------------------------
#Test statistic : Chi-Squared =          62.40 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     57 degrees of freedom 
# Null hypothesis probability =   2.901627e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.116e-07   2.075e-08
25- 50  1.949e-07   3.702e-08
50-150  3.249e-07   1.669e-07
15-150  6.314e-07   2.009e-07
Double BB
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.63538        (-2.15594      2.26245)
R1^2/D10^2  : 0.453667        (-0.229675      0.850731)
kT2 [keV]   : 25.1664        (-10.0047      29.4773)
R2^2/D10^2  : 3.05620E-03    (-0.00193816   0.00915453)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.27 using 59 PHA bins.
#Test statistic : Chi-Squared =          61.27 using 59 PHA bins.
# Reduced chi-squared =          1.114 for     55 degrees of freedom 
# Null hypothesis probability =   2.611492e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.117e-07   6.511e-08
25- 50  1.872e-07   1.055e-07
50-150  3.142e-07   1.929e-07
15-150  6.131e-07   3.379e-07

Peak spectrum fit

Power-law model
Time interval is from   -1.580 sec. to   -0.580 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55395     ( -0.465553   0.491961 )
Norm@50keV  : 5.96395E-03    ( -0.00179201   0.00176092 )
------------------------------------------------------------
#Test statistic : Chi-Squared =          69.77 using 59 PHA bins.
# Reduced chi-squared =          1.224 for     57 degrees of freedom 
# Null hypothesis probability =   1.193866e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.755869 ( -0.220866  0.221701 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.61128e-08 ( -1.76789e-08  1.80749e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.580 sec. to   -0.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.240476     ( -3.68349   1.66214 )
Epeak [keV] : 69.2722      ( -25.4659 -69.2731 )
Norm@50keV  : 2.63071E-02    ( -0.0263063   1.63568 )
------------------------------------------------------------
#Test statistic : Chi-Squared =          68.51 using 59 PHA bins.
# Reduced chi-squared =          1.223 for     56 degrees of freedom 
# Null hypothesis probability =   1.217378e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.721216 ( -0.231057  0.229782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.30549e-08 ( -1.80397e-08  1.87784e-08 ) ergs/cm2
 
Band function
Time interval is from   -1.580 sec. to   -0.580 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.240211   ( -0.971361   0.91724 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 69.2403      ( -25.5369 248.47 )
Norm@50keV   : 2.63246E-02    ( -0.0263246   1.64741 )
------------------------------------------------------------
#Test statistic : Chi-Squared =          68.51 using 59 PHA bins.
# Reduced chi-squared =          1.246 for     55 degrees of freedom 
# Null hypothesis probability =   1.041248e-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]    : 15.2010  (-4.17468  6.05901)
R^2/D10^2   : 8.58533E-02  (-0.0858426   0.180541)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Test statistic : Chi-Squared =          69.48 using 59 PHA bins.
# Reduced chi-squared =          1.219 for     57 degrees of freedom 
# Null hypothesis probability =   1.241551e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.144e-09   2.448e-09
25- 50  1.667e-08   8.866e-09
50-150  2.637e-08   1.776e-08
15-150  4.718e-08   2.882e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 185.595       (-121.738      -185.13)
Norm        : 3.12768       (-0.899797     1.19647)
------------------------------------------------------------
#Test statistic : Chi-Squared =          69.19 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     57 degrees of freedom 
# Null hypothesis probability =   1.290277e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.859e-09   4.750e-09
25- 50  1.499e-08   8.660e-09
50-150  3.208e-08   1.886e-08
15-150  5.493e-08   3.253e-08
Double BB
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.64694        (-2.61984      22.093)
R1^2/D10^2  : 41.8919        (-50.2792      -50.2792)
kT2 [keV]   : 16.8273        (-4.94303      -16.8369)
R2^2/D10^2  : 5.66825E-02    (-0.0575726   0.14102)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.75 using 59 PHA bins.
#Test statistic : Chi-Squared =          67.75 using 59 PHA bins.
# Reduced chi-squared =          1.232 for     55 degrees of freedom 
# Null hypothesis probability =   1.160640e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.723e-09   5.185e-09
25- 50  1.470e-08   8.930e-09
50-150  2.899e-08   1.924e-08
15-150  5.041e-08   2.967e-08
Plot creation:
Mon Feb 11 10:24:25 EST 2013