batgrbproduct Analysis for Trigger=558753

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Jun 22 15:17:12 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger558753/GCN5_download_cron
======================================================================

  Trigger: 00558753      Segment: 000

  BAT Trigger Time: 393559848   [s; MET]
      Trigger Stop: 393559920   [s; MET]
               UTC: 2013-06-22T02:10:37.297500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.231373544066   Dec: -15.3958555039321  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.57
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    15.57

  Flight Position:   [ source = BAT ]
    RA: 245.231373544066   Dec: -15.3958555039321  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 245.233989372927   Dec: -15.4269752054865  [deg; J2000]  
        { 16h 20m 56.2s , -15d 25' 37.1" }
         +/- 1.04303974992178 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.365640947411475 [arcmin] (formal 1-sigma fit error)
    SNR: 28.6400844935313
 
  Angular difference between Flight and Ground position is 1.873303 arcmin
 
  Partial Coding Fraction: 0.4414062    [ including projection effects ]

  Duration
     T90: 669.043999910355 +/- 77.5259874225858
        Measured from: -67.7839998602867
                   to: 601.260000050068     [s; relative to TRIGTIME]
     T50: 311.195999920368 +/- 33.386584411397
        Measured from: 28.9480001330376
                   to: 340.144000053406     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 67.5400000214577     
                   to: 68.5400000214577     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -88     
                   to: 747.308000028133     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    24.909938   1.793696   0.125808  -0.037507
           0.276125   0.260200   0.226767   0.201435 [error]
 Peak      0.041407   0.021733   0.021557   0.012683
           0.009395   0.009599   0.007988   0.007329 [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 8.51e-06 9.50e-07 4.45e-08 2.18e-09 9.50e-06 9.50e-06   erg/cm2
              Error 7.24e-07 1.21e-07 1.46e-08 1.23e-09 7.16e-07 7.16e-07   erg/cm2
Peak flux Power-law 4.95e-01 2.10e-01 5.30e-02 1.63e-02 7.69e-01 7.76e-01   ph/cm2/s
              Error 1.81e-01 1.13e-01 6.49e-02 4.71e-02 2.32e-01 2.40e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.25e-06 6.41e-07 2.07e-10 3.02e-18 8.89e-06 8.89e-06   erg/cm2
              Error 8.45e-07 1.39e-07 9.46e-10 7.56e-15 8.52e-07 8.52e-07   erg/cm2
Peak flux Cutoff-PL 4.93e-01 2.12e-01 5.38e-02 1.67e-02 7.71e-01 7.79e-01   ph/cm2/s
              Error 1.31e-01 1.54e-01 4.43e-02 3.71e-02 2.27e-01 2.37e-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    6.415    0.301    -      -           6.17e-05 1.66e-05   59.420 57
CPL   1.000    0.000      50.0    0.0      1.24e-03 0.00e+00  545.000 56
 
The chi2 of BB fit is 39.45 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    2.977    1.352    -      -           2.85e-03 2.81e-03   62.380 57
CPL   1.958    0.000       2.2    0.0      9.72e-03 0.00e+00   64.490 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  835.308  -88.000  747.308
T90   669.044  -67.784  601.260
T50   311.196   28.948  340.144
Peak    1.000   67.540   68.540

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  245.2340 -15.4270 0.0067   26.5  104.2      28.7710    28.6  TRIG_00558753       
------------------------------------------
 
Foreground time interval of the image:
-78.499 747.308 (delta_t = 825.807 [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  -88.000 sec. to  747.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.41470     ( -0.300323   0.301223 )
Norm@50keV  : 6.16507E-05    ( -1.47637e-05   1.84423e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.42 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     57 degrees of freedom 
# Null hypothesis probability =   3.874579e-01
 
Photon flux (15-150 keV)    in 835.3 sec: 0.385992 ( -0.0314791  0.03175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.50246e-06 ( -7.13962e-07  7.18808e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -88.000 sec. to  747.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.24182E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         545.00 using 59 PHA bins.
# Reduced chi-squared =         9.7321 for     56 degrees of freedom 
# Null hypothesis probability =   2.618990e-81
 
Photon flux (15-150 keV)    in 835.3 sec: 0.361294 ( -0.038593  0.03743 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.88634e-06 ( -8.64494e-07  8.38808e-07 ) ergs/cm2
 
Band function
Time interval is from  -88.000 sec. to  747.308 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.65097   ( -2.2695   1.59822 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 9.67728      ( -1.0838 3.30428 )
Norm@50keV   : 216.800    ( -216.8   53639.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.58 using 59 PHA bins.
# Reduced chi-squared =         0.7196 for     55 degrees of freedom 
# Null hypothesis probability =   9.418449e-01
 
Photon flux (15-150 keV)    in 835.3 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]    : 2.54099  (-0.129662  0.142445)
R^2/D10^2   : 160.457  (-59.3458   92.1876)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.45 using 59 PHA bins.
# Reduced chi-squared =         0.6920 for     57 degrees of freedom 
# Null hypothesis probability =   9.630629e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.268e-06   1.165e-06
25- 50  6.488e-07   1.049e-07
50-150  2.401e-10   1.353e-10
15-150  8.917e-06   1.026e-06
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.28178       (-0.311327      0.356127)
Norm        : 158.193       (-50.7731     73.7665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.98 using 59 PHA bins.
# Reduced chi-squared =         0.7365 for     57 degrees of freedom 
# Null hypothesis probability =   9.318259e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.479e-06   1.051e-06
25- 50  7.382e-07   1.159e-07
50-150  1.645e-09   8.680e-10
15-150  9.219e-06   1.071e-06
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 47.5005        (      )
R1^2/D10^2  : 4.35945E-06        (-5.29749e-06      0.00244922)
kT2 [keV]   : 2.53916        (-0.133043      0.142205)
R2^2/D10^2  : 161.334    (-59.1279   96.111)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.45 using 59 PHA bins.
#Fit statistic : Chi-Squared =          39.35 using 59 PHA bins.
# Reduced chi-squared =         0.7172 for     55 degrees of freedom 
# Reduced chi-squared =         0.7155 for     55 degrees of freedom 
# Null hypothesis probability =   9.436603e-01
# Null hypothesis probability =   9.449512e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.274e-06   1.487e+03
25- 50  6.500e-07   1.453e+04
50-150  2.413e-10   3.632e+05
15-150  8.924e-06   3.648e+05

Peak spectrum fit

Power-law model
Time interval is from   67.540 sec. to   68.540 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97677     ( -0.983499   1.72113 )
Norm@50keV  : 2.84584E-03    ( -0.00282504   0.00279992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.38 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     57 degrees of freedom 
# Null hypothesis probability =   2.907991e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.768787 ( -0.23378  0.231001 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36841e-08 ( -1.48673e-08  1.89858e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   67.540 sec. to   68.540 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95796     (     )
Epeak [keV] : 2.16390      (   )
Norm@50keV  : 9.72216E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.49 using 59 PHA bins.
# Reduced chi-squared =          1.152 for     56 degrees of freedom 
# Null hypothesis probability =   2.040844e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.770954 ( -0.231983  0.222536 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.33182e-08 ( -1.44968e-08  1.7253e-08 ) ergs/cm2
 
Band function
Time interval is from   67.540 sec. to   68.540 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.98765   ( 9.98765   9.98765 )
beta        : -2.98413    ( -1.71399   0.99129 )
Epeak [keV] : 4.37879      ( -4.37879 -4.37879 )
Norm@50keV   : 0.384525    ( -0.382871   0.38164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.38 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Null hypothesis probability =   2.303964e-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]    : 3.87263  (-1.38745  2.15017)
R^2/D10^2   : 20.7734  (-20.8505   266.003)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     57 degrees of freedom 
# Null hypothesis probability =   1.930678e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.612e-08   9.505e-09
25- 50  5.301e-09   3.333e-09
50-150  5.282e-11   5.800e-11
15-150  2.147e-08   1.272e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 11.7269       (-6.67532      42.8207)
Norm        : 17.9454       (-17.8149     108.126)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.67 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     57 degrees of freedom 
# Null hypothesis probability =   2.264216e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.562e-08   9.210e-09
25- 50  8.222e-09   5.305e-09
50-150  8.481e-10   8.650e-10
15-150  2.469e-08   1.459e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.52023        (-1.33468      1.69084)
R1^2/D10^2  : 33.3611        (-29.058      157.975)
kT2 [keV]   : 68.0741        (-52.1302      -69.1565)
R2^2/D10^2  : 6.38218E-04    (-0.000488751   0.0270892)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.14 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.603756e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.602e-08   9.490e-09
25- 50  5.820e-09   3.078e-09
50-150  3.045e-08   1.791e-08
15-150  5.230e-08   2.892e-08
Plot creation:
Sat Jun 22 15:25:41 EDT 2013