batgrbproduct Analysis for Trigger=361128

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Sat Aug 29 12:12:13 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger361128/GCN5_download_cron
======================================================================

  Trigger: 00361128      Segment: 000

  BAT Trigger Time: 273192712   [s; MET]
      Trigger Stop: 273193032   [s; MET]
               UTC: 2009-08-28T22:51:46.962220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 130.251873646219   Dec: -45.051615934863  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.62
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.62

  Flight Position:   [ source = BAT ]
    RA: 130.251873646219   Dec: -45.051615934863  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 130.29568235297   Dec: -45.0751004459761  [deg; J2000]  
        { 08h 41m 11.0s , -45d 04' 30.4" }
         +/- 4.18163264151845 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.04391512151435 [arcmin] (formal 1-sigma fit error)
    SNR: 3.9398656502109
 
  Angular difference between Flight and Ground position is 2.330752 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 0.0239999294281006 +/- 0.0113137314268704
        Measured from: 91.4160001277924
                   to: 91.4400000572205     [s; relative to TRIGTIME]
     T50: 0.0159999132156372 +/- 0.01442223432929
        Measured from: 91.4200001358986
                   to: 91.4360000491142     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 90.9319999814034     
                   to: 91.9319999814034     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 91.4160000085831     
                   to: 91.444000005722     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.002604   0.002172   0.001240   0.002129
           0.000957   0.001003   0.000937   0.000908 [error]
 Peak      0.002766   0.002110   0.001076   0.001837
           0.001006   0.001046   0.000993   0.000982 [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 7.65e-10 2.36e-10 4.00e-11 7.85e-12 1.05e-09 1.05e-09   erg/cm2
              Error 5.85e-10 2.56e-10 9.24e-11 5.00e-11 7.06e-10 7.16e-10   erg/cm2
Peak flux Power-law 8.04e-01 1.54e-01 1.45e-02 1.48e-03 9.74e-01 9.76e-01   ph/cm2/s
              Error 6.28e-01 1.58e-01 2.96e-02 7.56e-03 7.75e-01 7.76e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.65e-10 2.36e-10 4.00e-11 7.79e-12 1.05e-09 1.05e-09   erg/cm2
              Error 5.85e-10 2.56e-10 9.23e-11 4.96e-11 7.07e-10 7.16e-10   erg/cm2
Peak flux Cutoff-PL 8.04e-01 1.54e-01 1.45e-02 1.47e-03 9.74e-01 9.74e-01   ph/cm2/s
              Error 6.28e-01 1.58e-01 2.96e-02 7.51e-03 7.75e-01 7.76e-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    4.559    2.968    -      -           1.10e-03 1.86e-03   48.460 57
CPL   1.000    0.000      50.0    0.0      4.46e-03 0.00e+00   57.520 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.441    2.885    -      -           1.07e-03 1.72e-03   51.770 57
CPL   1.000    0.000      50.0    0.0      4.05e-03 0.00e+00   59.510 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    0.028   91.416   91.444
T90     0.024   91.416   91.440
T50     0.016   91.420   91.436
Peak    1.000   90.932   91.932

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  130.2957 -45.0751 0.0488   31.1   -0.4       0.0076     3.9  TRIG_00361128       
------------------------------------------
 
Foreground time interval of the image:
 91.416  91.444 (delta_t =   0.028 [sec])
Background time interval of the image:
-239.000  91.416 (delta_t = 330.416 [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   91.416 sec. to   91.444 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.55884     ( -1.31729   4.61901 )
Norm@50keV  : 1.09882E-03    ( -0.00109882   0.00261249 )
------------------------------------------------------------
# Chi-Squared =          48.46 using 59 PHA bins.
# Reduced chi-squared =         0.8502 for     57 degrees of freedom 
# Null hypothesis probability =   7.823347e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 1.12027 ( -1.12026  0.633308 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04576e-09 ( -7.11248e-10  7.01742e-10 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   91.416 sec. to   91.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 4.46353E-03    (     )
------------------------------------------------------------
# Chi-Squared =          57.52 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     56 degrees of freedom 
# Null hypothesis probability =   4.188541e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 1.11961 ( -1.11961  0.6331 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04575e-09 ( -7.11732e-10  7.01896e-10 ) ergs/cm2
 
Band function
Time interval is from   91.416 sec. to   91.444 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -7.38977   ( 4.5074   4.5074 )
beta        : -4.56230    ( -4.62472   1.31711 )
Epeak [keV] : 0.833464      ( -0.833464 -0.833464 )
Norm@50keV   : 0.148794    ( -0.149376   0.354913 )
------------------------------------------------------------
# Chi-Squared =          48.46 using 59 PHA bins.
# Reduced chi-squared =         0.8811 for     55 degrees of freedom 
# Null hypothesis probability =   7.209270e-01
 
Photon flux (15-150 keV)    in 0.028 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]    : 4.50640  (-2.86072  1.73317)
R^2/D10^2   : 19.4471  (-19.4461   11674.9)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          48.05 using 59 PHA bins.
# Reduced chi-squared =         0.8429 for     57 degrees of freedom 
# Null hypothesis probability =   7.949050e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.573e-10   5.226e-10
25- 50  4.294e-10   3.315e-10
50-150  1.028e-11   1.141e-11
15-150  1.297e-09   8.513e-10
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 9.17774       (-6.55763      7.77207)
Norm        : 53.1335       (-39.1747     3366.28)
------------------------------------------------------------
# Chi-Squared =          47.92 using 59 PHA bins.
# Reduced chi-squared =         0.8406 for     57 degrees of freedom 
# Null hypothesis probability =   7.987815e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.545e-10   5.599e-10
25- 50  3.266e-10   2.436e-10
50-150  1.759e-11   2.058e-11
15-150  1.199e-09   7.984e-10
Double BB
R1^2/D10^2  : 8.23391        (-16.2848      11643.3)
kT2 [keV]   : 1.25395        (      )
R2^2/D10^2  : 8.99909E+04    (   )
------------------------------------------------------------
# Chi-Squared =          48.05 using 59 PHA bins.
# Chi-Squared =          47.21 using 59 PHA bins.
# Chi-Squared =          47.11 using 59 PHA bins.
# Reduced chi-squared =         0.8736 for     55 degrees of freedom 
# Reduced chi-squared =         0.8584 for     55 degrees of freedom 
# Reduced chi-squared =         0.8565 for     55 degrees of freedom 
# Null hypothesis probability =   7.352546e-01
# Null hypothesis probability =   7.631168e-01
# Null hypothesis probability =   7.664551e-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

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   91.416 sec. to   91.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.44129     ( -1.31069   4.45837 )
Norm@50keV  : 1.07227E-03    ( -0.00108385   0.00235419 )
------------------------------------------------------------
# Chi-Squared =          51.77 using 59 PHA bins.
# Reduced chi-squared =         0.9082 for     57 degrees of freedom 
# Null hypothesis probability =   6.710269e-01
 
Photon flux (15-150 keV)    in 0.032 sec: 0.974345 ( -0.974345  0.576136 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05583e-09 ( -7.32445e-10  7.25462e-10 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   91.416 sec. to   91.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 4.04651E-03    (     )
------------------------------------------------------------
# Chi-Squared =          59.51 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     56 degrees of freedom 
# Null hypothesis probability =   3.490825e-01
 
Photon flux (15-150 keV)    in 0.032 sec: 0.973820 ( -0.97382  0.57611 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05588e-09 ( -7.32899e-10  7.2559e-10 ) ergs/cm2
 
Band function
Time interval is from   91.416 sec. to   91.448 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.66879   ( 3.28998   6.24742 )
beta        : -4.40649    ( -4.46912   1.29337 )
Epeak [keV] : 937.866      ( -937.866 -937.866 )
Norm@50keV   : 0.149451    ( -0.148256   0.318914 )
------------------------------------------------------------
# Chi-Squared =          51.77 using 59 PHA bins.
# Reduced chi-squared =         0.9412 for     55 degrees of freedom 
# Null hypothesis probability =   5.988927e-01
 
Photon flux (15-150 keV)    in 0.032 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]    : 4.53173  (-2.5731  1.76304)
R^2/D10^2   : 16.6631  (-16.6563   2309.19)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          51.01 using 59 PHA bins.
# Reduced chi-squared =         0.8948 for     57 degrees of freedom 
# Null hypothesis probability =   6.982505e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.603e-10   5.349e-10
25- 50  4.373e-10   3.147e-10
50-150  1.079e-11   1.295e-11
15-150  1.308e-09   8.752e-10
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 9.41957       (-6.42736      8.30433)
Norm        : 43.8753       (-32.9731     1346.37)
------------------------------------------------------------
# Chi-Squared =          51.09 using 59 PHA bins.
# Reduced chi-squared =         0.8964 for     57 degrees of freedom 
# Null hypothesis probability =   6.951127e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.472e-10   5.394e-10
25- 50  3.360e-10   3.018e-10
50-150  1.951e-11   2.885e-11
15-150  1.203e-09   8.515e-10
Double BB
R1^2/D10^2  : 8.84024        (      )
kT2 [keV]   : 1.13814        (-1.61293      5.32709)
R2^2/D10^2  : 1.80300E+05    (   )
------------------------------------------------------------
# Chi-Squared =          50.56 using 59 PHA bins.
# Chi-Squared =          50.54 using 59 PHA bins.
# Chi-Squared =          50.45 using 59 PHA bins.
# Reduced chi-squared =         0.9193 for     55 degrees of freedom 
# Reduced chi-squared =         0.9188 for     55 degrees of freedom 
# Reduced chi-squared =         0.9174 for     55 degrees of freedom 
# Null hypothesis probability =   6.447523e-01
# Null hypothesis probability =   6.456751e-01
# Null hypothesis probability =   6.487207e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.239e-10   5.411e-10
25- 50  4.218e-10   3.093e-10
50-150  1.661e-11   1.383e-11
15-150  1.262e-09   1.004e-09
Plot creation:
Sat Aug 29 12:24:40 EDT 2009