batgrbproduct Analysis for Trigger=520658

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Apr 22 17:36:53 EDT 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger520658/GCN5_download_cron
======================================================================

  Trigger: 00520658      Segment: 000

  BAT Trigger Time: 356771531.776   [s; MET]
      Trigger Stop: 356771535.872   [s; MET]
               UTC: 2012-04-22T07:12:03.648220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 136.929034138057   Dec: 14.0064324830064  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.33
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8321595661992  [ if not an image trigger ]
     Image S/N Ratio:    8.33

  Flight Position:   [ source = BAT ]
    RA: 136.929034138057   Dec: 14.0064324830064  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 136.912341765385   Dec: 13.983595977031  [deg; J2000]  
        { 09h 07m 39.0s , +13d 59' 00.9" }
         +/- 2.03222811964528 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.679448421528523 [arcmin] (formal 1-sigma fit error)
    SNR: 11.0447967454903
 
  Angular difference between Flight and Ground position is 1.679834 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: 7 +/- 2.23606797749979
        Measured from: -0.775999903678894
                   to: 6.22400009632111     [s; relative to TRIGTIME]
     T50: 3 +/- 1.4142135623731
        Measured from: 1.22400009632111
                   to: 4.22400009632111     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.22399997711182     
                   to: 2.22399997711182     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.776000022888184     
                   to: 7.22399997711182     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.067458   0.152132   0.112761   0.012796
           0.017604   0.018590   0.016763   0.014631 [error]
 Peak      0.013233   0.022819   0.030271   0.001029
           0.006282   0.006587   0.006083   0.005406 [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 2.48e-08 5.24e-08 8.67e-08 3.25e-07 2.39e-07 4.89e-07   erg/cm2
              Error 6.39e-09 8.39e-09 1.58e-08 1.28e-07 3.99e-08 1.40e-07   erg/cm2
Peak flux Power-law 1.17e-01 1.64e-01 1.71e-01 3.26e-01 5.54e-01 7.78e-01   ph/cm2/s
              Error 6.32e-02 5.49e-02 4.68e-02 1.97e-01 1.48e-01 2.24e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.15e-08 5.74e-08 9.12e-08 1.01e-07 2.72e-07 0.00e+00   erg/cm2
              Error 7.37e-09 1.06e-08 1.82e-08 1.68e-07 1.75e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 7.02e-02 1.64e-01 2.00e-01 1.20e-01 5.13e-01 5.54e-01   ph/cm2/s
              Error 8.08e-02 7.18e-02 6.37e-02 1.45e-01 1.60e-01 2.82e-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 6.29e-01 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    1.274    0.247    -      -           3.00e-03 4.46e-04   67.860 57
CPL   0.398    1.099      91.5  -30.7      8.31e-03 1.71e-02   65.490 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.943    0.458    -      -           4.83e-03 1.28e-03   52.930 57
CPL  -0.558    2.948     103.6  -34.1      1.95e-02 2.44e-01   51.390 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: 3.072000 sec.
T50 in the 50-300 keV band: 1.856000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.000   -0.776    7.224
T90     7.000   -0.776    6.224
T50     3.000    1.224    4.224
Peak    1.000    1.224    2.224

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  136.9123 +13.9836 0.0175   23.6 -111.1       0.3854    11.0  TRIG_00520658       
------------------------------------------
 
Foreground time interval of the image:
 -0.776   7.224 (delta_t =   8.000 [sec])
Background time interval of the image:
-239.776  -0.776 (delta_t = 239.000 [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   -0.776 sec. to    7.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27364     ( -0.248517   0.245242 )
Norm@50keV  : 3.00165E-03    ( -0.000446481   0.000445807 )
------------------------------------------------------------
# Chi-Squared =          67.86 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     57 degrees of freedom 
# Null hypothesis probability =   1.538501e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.356425 ( -0.0534369  0.0535256 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.38859e-07 ( -3.9562e-08  4.0181e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.776 sec. to    7.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.398172     ( -1.24347   0.955137 )
Epeak [keV] : 91.4885      ( -30.1167 -91.4894 )
Norm@50keV  : 8.30823E-03    ( -0.00830801   0.0257989 )
------------------------------------------------------------
# Chi-Squared =          65.49 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     56 degrees of freedom 
# Null hypothesis probability =   1.807143e-01
 
Photon flux (15-150 keV)    in 8 sec: 0.344508 ( -0.055118  0.055166 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.71578e-07 ( -8.2884e-08  2.67155e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.776 sec. to    7.224 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.442489   ( -0.785096   1.08931 )
beta        : -9.37167    ( 10   20 )
Epeak [keV] : 94.6492      ( -94.5681 234.554 )
Norm@50keV   : 7.83596E-03    ( -0.00498488   0.00959253 )
------------------------------------------------------------
# Chi-Squared =          65.50 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     55 degrees of freedom 
# Null hypothesis probability =   1.571880e-01
 
Photon flux (15-150 keV)    in 8 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]    : 16.4912  (-2.88064  3.64485)
R^2/D10^2   : 3.10577E-02  (-0.0152568   0.0287)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          70.95 using 59 PHA bins.
# Reduced chi-squared =          1.245 for     57 degrees of freedom 
# Null hypothesis probability =   1.013417e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.387e-08   4.036e-09
25- 50  5.988e-08   1.380e-08
50-150  1.151e-07   3.331e-08
15-150  1.888e-07   4.320e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.998       (      )
Norm        : 1.47098       (-1.47098     -1.47098)
------------------------------------------------------------
# Chi-Squared =          69.77 using 59 PHA bins.
# Reduced chi-squared =          1.224 for     57 degrees of freedom 
# Null hypothesis probability =   1.193448e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.930e-08   1.612e-08
25- 50  5.637e-08   3.076e-08
50-150  1.236e-07   6.776e-08
15-150  2.093e-07   1.137e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.53125        (-3.25273      4.88537)
R1^2/D10^2  : 0.162866        (-0.116824      0.300764)
kT2 [keV]   : 27.8375        (-22.4559      75.9173)
R2^2/D10^2  : 3.97517E-03    (-0.00393423   0.0151609)
------------------------------------------------------------
# Chi-Squared =          64.15 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     55 degrees of freedom 
# Null hypothesis probability =   1.864174e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.194e-08   1.273e-08
25- 50  5.903e-08   3.259e-08
50-150  1.465e-07   8.260e-08
15-150  2.275e-07   1.160e-07

Peak spectrum fit

Power-law model
Time interval is from    1.224 sec. to    2.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.942514     ( -0.475298   0.440152 )
Norm@50keV  : 4.82678E-03    ( -0.00129012   0.0012739 )
------------------------------------------------------------
# Chi-Squared =          52.93 using 59 PHA bins.
# Reduced chi-squared =         0.9287 for     57 degrees of freedom 
# Null hypothesis probability =   6.283481e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.554392 ( -0.147746  0.149254 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32874e-08 ( -1.46601e-08  1.49173e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.224 sec. to    2.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.557863     ( -4.18803   1.70866 )
Epeak [keV] : 103.580      ( -35.6009 -103.703 )
Norm@50keV  : 1.95093E-02    ( -0.0201311   0.46819 )
------------------------------------------------------------
# Chi-Squared =          51.39 using 59 PHA bins.
# Reduced chi-squared =         0.9176 for     56 degrees of freedom 
# Null hypothesis probability =   6.499000e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.513096 ( -0.160047  0.160185 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.02042e-08 ( -1.52289e-08  1.57175e-08 ) ergs/cm2
 
Band function
Time interval is from    1.224 sec. to    2.224 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38549   ( 0.455929   4.7128 )
beta        : 10.00000    ( -1.97895e+15   -1.97895e+15 )
Epeak [keV] : 6.29921      ( -6.29921 -6.29921 )
Norm@50keV   : 2.73232E-19    ( -2.73232e-19   -2.73232e-19 )
------------------------------------------------------------
# Chi-Squared =          53.60 using 59 PHA bins.
# Reduced chi-squared =         0.9745 for     55 degrees of freedom 
# Null hypothesis probability =   5.283866e-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]    : 23.3953  (-6.0194  9.73656)
R^2/D10^2   : 1.71032E-02  (-0.0111744   0.026731)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          51.46 using 59 PHA bins.
# Reduced chi-squared =         0.9029 for     57 degrees of freedom 
# Null hypothesis probability =   6.819663e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.682e-09   1.017e-09
25- 50  9.215e-09   5.455e-09
50-150  3.765e-08   2.191e-08
15-150  4.854e-08   2.368e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.999       (      )
Norm        : 2.26110       (-2.2611     -2.2611)
------------------------------------------------------------
# Chi-Squared =          57.67 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     57 degrees of freedom 
# Null hypothesis probability =   4.504003e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.630e-09   3.346e-09
25- 50  1.083e-08   6.540e-09
50-150  2.375e-08   1.413e-08
15-150  4.021e-08   2.382e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.72528        (-3.70988      -3.70988)
R1^2/D10^2  : 2.56286        (-2.60198      58.0643)
kT2 [keV]   : 24.8220        (-6.85636      -24.8141)
R2^2/D10^2  : 1.38638E-02    (-0.0138786   0.024573)
------------------------------------------------------------
# Chi-Squared =          50.76 using 59 PHA bins.
# Reduced chi-squared =         0.9229 for     55 degrees of freedom 
# Null hypothesis probability =   6.373418e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.123e-09   1.810e-09
25- 50  8.899e-09   5.170e-09
50-150  3.851e-08   2.423e-08
15-150  5.053e-08   2.922e-08
Plot creation:
Sun Apr 22 17:52:51 EDT 2012