batgrbproduct Analysis for Trigger=515375

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Feb 20 03:38:42 EST 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger515375/GCN5_download_cron
======================================================================

  Trigger: 00515375      Segment: 000

  BAT Trigger Time: 351354616   [s; MET]
      Trigger Stop: 351354680   [s; MET]
               UTC: 2012-02-19T14:30:08.092340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 129.792968291079   Dec: 51.0246599454996  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.92
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.92

  Flight Position:   [ source = BAT ]
    RA: 129.792968291079   Dec: 51.0246599454996  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 129.861689754795   Dec: 51.0061653619813  [deg; J2000]  
        { 08h 39m 26.8s , +51d 00' 22.2" }
         +/- 2.24025598628151 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.16052172616541 [arcmin] (formal 1-sigma fit error)
    SNR: 9.60933138714943
 
  Angular difference between Flight and Ground position is 2.821392 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 90.4559999704361 +/- 10.8813793587216
        Measured from: -6.01199990510941
                   to: 84.4440000653267     [s; relative to TRIGTIME]
     T50: 61.0639999508858 +/- 10.1761754863075
        Measured from: 2.34400010108948
                   to: 63.4080000519753     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -2.2960000038147     
                   to: -1.2960000038147     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -7.83200001716614     
                   to: 90.0600000023842     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.327323   0.495714   0.233213   0.081600
           0.051231   0.052856   0.047144   0.041993 [error]
 Peak      0.007598   0.016130   0.013608   0.007791
           0.005260   0.005529   0.004790   0.004302 [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 9.43e-08 1.67e-07 2.27e-07 6.35e-07 6.57e-07 1.12e-06   erg/cm2
              Error 1.97e-08 2.35e-08 4.40e-08 2.49e-07 1.07e-07 2.91e-07   erg/cm2
Peak flux Power-law 9.50e-02 1.03e-01 7.92e-02 9.97e-02 3.15e-01 3.77e-01   ph/cm2/s
              Error 5.97e-02 4.32e-02 3.75e-02 1.12e-01 1.25e-01 1.54e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.55e-08 2.12e-07 2.08e-07 4.62e-08 5.42e-07 0.00e+00   erg/cm2
              Error 2.37e-08 3.67e-08 6.26e-08 9.55e-08 1.42e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.43e-02 1.37e-01 8.48e-02 4.72e-03 2.71e-01 2.71e-01   ph/cm2/s
              Error 6.35e-02 6.61e-02 6.87e-02 5.43e-02 1.27e-01 1.30e-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 2.88e-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    1.559    0.226    -      -           7.14e-04 1.07e-04   63.870 57
CPL  -0.603    1.691      51.6   14.1      1.16e-02 8.20e-02   54.790 56
 
The chi2 of BB fit is 55.53 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    1.377    0.644    -      -           2.60e-03 1.04e-03   44.330 57
CPL  -2.341    0.717      55.0 4962.0      2.10e-01 1.56e+03   41.610 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: 15.168000 sec.
T50 in the 50-300 keV band: 8.448000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   97.892   -7.832   90.060
T90    90.456   -6.012   84.444
T50    61.064    2.344   63.408
Peak    1.000   -2.296   -1.296

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  129.8617 +51.0062 0.0200   20.2  130.8       1.0337     9.6  TRIG_00515375       
------------------------------------------
 
Foreground time interval of the image:
 -7.832  70.901 (delta_t =  78.733 [sec])
Background time interval of the image:
-239.000 -212.100 (delta_t =  26.900 [sec])
-211.000  -7.832 (delta_t = 203.168 [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   -7.832 sec. to   90.060 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55939     ( -0.223454   0.227908 )
Norm@50keV  : 7.13645E-04    ( -0.000107234   0.000106114 )
------------------------------------------------------------
# Chi-Squared =          63.87 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.478461e-01
 
Photon flux (15-150 keV)    in 97.89 sec: 9.05903E-02 ( -0.0126448  0.0126498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.56814e-07 ( -1.05845e-07  1.08327e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -7.832 sec. to   90.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.602634     ( -2.02103   1.36004 )
Epeak [keV] : 51.5662      ( -8.50313 19.765 )
Norm@50keV  : 1.16294E-02    ( -0.0121831   0.151754 )
------------------------------------------------------------
# Chi-Squared =          54.79 using 59 PHA bins.
# Reduced chi-squared =         0.9783 for     56 degrees of freedom 
# Null hypothesis probability =   5.209051e-01
 
Photon flux (15-150 keV)    in 97.89 sec: 8.40364E-02 ( -0.0131  0.0131762 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.41754e-07 ( -1.08586e-07  1.75529e-07 ) ergs/cm2
 
Band function
Time interval is from   -7.832 sec. to   90.060 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.46309   ( -2.50205   -1.99153 )
beta        : -2.80089    ( -6.35555   0.940579 )
Epeak [keV] : 46.2059      ( -14.5516 20.7466 )
Norm@50keV   : 3.94481E-02    ( -0.0352716   6.81859 )
------------------------------------------------------------
# Chi-Squared =          53.62 using 59 PHA bins.
# Reduced chi-squared =         0.9749 for     55 degrees of freedom 
# Null hypothesis probability =   5.274086e-01
 
Photon flux (15-150 keV)    in 97.89 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]    : 12.4201  (-1.60771  1.93438)
R^2/D10^2   : 2.10911E-02  (-0.00867324   0.0138286)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          55.53 using 59 PHA bins.
# Reduced chi-squared =         0.9743 for     57 degrees of freedom 
# Null hypothesis probability =   5.302882e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.750e-08   1.785e-08
25- 50  2.211e-07   4.155e-08
50-150  2.097e-07   6.275e-08
15-150  4.982e-07   9.593e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 154.817       (      )
Norm        : 0.379674       (-0.0550787     0.0681056)
------------------------------------------------------------
# Chi-Squared =          60.74 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     57 degrees of freedom 
# Null hypothesis probability =   3.425586e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.107e-08   5.012e-08
25- 50  1.748e-07   9.593e-08
50-150  3.809e-07   2.110e-07
15-150  6.467e-07   3.523e-07
Double BB
------------------------------------------------------------
# Chi-Squared =          53.88 using 59 PHA bins.
# Chi-Squared =          53.85 using 59 PHA bins.
# Chi-Squared =          53.80 using 59 PHA bins.
# Chi-Squared =          53.77 using 59 PHA bins.
# Reduced chi-squared =         0.9796 for     55 degrees of freedom 
# Reduced chi-squared =         0.9790 for     55 degrees of freedom 
# Reduced chi-squared =         0.9782 for     55 degrees of freedom 
# Reduced chi-squared =         0.9776 for     55 degrees of freedom 
# Null hypothesis probability =   5.174766e-01
# Null hypothesis probability =   5.187958e-01
# Null hypothesis probability =   5.204321e-01
# Null hypothesis probability =   5.217779e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.480e-08   4.262e-08
25- 50  2.152e-07   1.375e-07
50-150  2.850e-07   1.763e-07
15-150  5.750e-07   3.279e-07

Peak spectrum fit

Power-law model
Time interval is from   -2.296 sec. to   -1.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37712     ( -0.64133   0.647383 )
Norm@50keV  : 2.59603E-03    ( -0.00104327   0.00103297 )
------------------------------------------------------------
# Chi-Squared =          44.33 using 59 PHA bins.
# Reduced chi-squared =         0.7777 for     57 degrees of freedom 
# Null hypothesis probability =   8.896379e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.314566 ( -0.124547  0.125194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.52005e-08 ( -1.07903e-08  1.12758e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.296 sec. to   -1.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.34120     ( 2.41717   3.85026 )
Epeak [keV] : 55.0126      ( -14.9534 9909.03 )
Norm@50keV  : 0.210160    ( -0.266371   3112.21 )
------------------------------------------------------------
# Chi-Squared =          41.61 using 59 PHA bins.
# Reduced chi-squared =         0.7430 for     56 degrees of freedom 
# Null hypothesis probability =   9.241197e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.270505 ( -0.118701  0.13442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.93189e-08 ( -8.9137e-09  2.90272e-08 ) ergs/cm2
 
Band function
Time interval is from   -2.296 sec. to   -1.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.16700   ( -1.15736   4.69166 )
beta        : -10.00000    ( 1.02488e+12   1.02488e+12 )
Epeak [keV] : 53.0090      ( -15.7402 -55.9778 )
Norm@50keV   : 0.555922    ( -0.484559   2.9022 )
------------------------------------------------------------
# Chi-Squared =          41.58 using 59 PHA bins.
# Reduced chi-squared =         0.7560 for     55 degrees of freedom 
# Null hypothesis probability =   9.092724e-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]    : 14.6579  (-4.29735  7.18844)
R^2/D10^2   : 4.37921E-02  (-0.043792   0.103417)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          41.75 using 59 PHA bins.
# Reduced chi-squared =         0.7325 for     57 degrees of freedom 
# Null hypothesis probability =   9.352519e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.977e-09   1.256e-09
25- 50  7.687e-09   4.707e-09
50-150  1.112e-08   7.875e-09
15-150  2.079e-08   1.334e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-200      -200)
Norm        : 1.31099       (-0.510599     0.58708)
------------------------------------------------------------
# Chi-Squared =          44.03 using 59 PHA bins.
# Reduced chi-squared =         0.7725 for     57 degrees of freedom 
# Null hypothesis probability =   8.957141e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.265e-09   2.050e-09
25- 50  6.280e-09   4.012e-09
50-150  1.377e-08   8.435e-09
15-150  2.332e-08   1.416e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.81166        (      )
R1^2/D10^2  : 67.1763        (-77.7979      -77.7979)
kT2 [keV]   : 14.9017        (-4.49289      7.93766)
R2^2/D10^2  : 4.08817E-02    (-0.0409344   0.104096)
------------------------------------------------------------
# Chi-Squared =          41.75 using 59 PHA bins.
# Chi-Squared =          41.68 using 59 PHA bins.
# Reduced chi-squared =         0.7591 for     55 degrees of freedom 
# Reduced chi-squared =         0.7579 for     55 degrees of freedom 
# Null hypothesis probability =   9.060594e-01
# Null hypothesis probability =   9.073677e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00
Plot creation:
Mon Feb 20 04:16:12 EST 2012