batgrbproduct Analysis for Trigger=360857

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Wed Aug 26 02:42:18 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger360857/GCN5_download_cron
======================================================================

  Trigger: 00360857      Segment: 000

  BAT Trigger Time: 272912361.024   [s; MET]
      Trigger Stop: 272912363.072   [s; MET]
               UTC: 2009-08-25T16:59:15.995400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 257.801836220526   Dec: 28.0448810938626  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.07
     Image Trigger?:     NO
     Rate S/N Ratio:     5.3851648071345  [ if not an image trigger ]
     Image S/N Ratio:    6.07

  Flight Position:   [ source = BAT ]
    RA: 257.801836220526   Dec: 28.0448810938626  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 257.838649722139   Dec: 28.0864724387974  [deg; J2000]  
        { 17h 11m 21.3s , +28d 05' 11.3" }
         +/- 4.6539642429346 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.89951547321214 [arcmin] (formal 1-sigma fit error)
    SNR: 3.38131368757803
 
  Angular difference between Flight and Ground position is 3.166435 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 2.04800003767014 +/- 
        Measured from: 0
                   to: 2.04800003767014     [s; relative to TRIGTIME]
     T50: 2.04800003767014 +/- 
        Measured from: 0
                   to: 2.04800003767014     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 2.04800003767014 second)
        Measured from: -2.98023223876953e-08     
                   to: 2.04800000786781     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 2.04800003767014     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.012491   0.031987   0.029856  -0.010823
           0.009113   0.009235   0.008157   0.006807 [error]
 Peak      0.012491   0.031987   0.029856  -0.010823
           0.009113   0.009235   0.008157   0.006807 [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 6.73e-09 1.22e-08 1.70e-08 4.92e-08 4.87e-08 8.50e-08   erg/cm2
              Error 3.41e-09 4.24e-09 7.35e-09 4.35e-08 1.83e-08 5.04e-08   erg/cm2
Peak flux Power-law 1.06e-01 1.05e-01 7.32e-02 8.04e-02 3.16e-01 3.65e-01   ph/cm2/s
              Error 5.46e-02 3.71e-02 3.08e-02 6.54e-02 1.08e-01 1.25e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.42e-09 1.44e-08 2.29e-08 4.88e-09 4.41e-08 4.48e-08   erg/cm2
              Error 3.06e-09 5.75e-09 9.80e-09 1.34e-08 1.62e-08 1.99e-08   erg/cm2
Peak flux Cutoff-PL 3.58e-02 1.18e-01 1.03e-01 1.25e-02 2.68e-01 2.69e-01   ph/cm2/s
              Error 3.93e-02 4.92e-02 4.18e-02 2.72e-02 1.01e-01 1.03e-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    1.525    0.530    -      -           2.51e-03 8.85e-04   55.400 57
CPL  -2.417    0.428      62.4   25.3      1.40e-01 6.08e-01   50.600 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.525    0.530    -      -           2.51e-03 8.85e-04   55.400 57
CPL  -2.417    0.428      62.4   25.3      1.40e-01 6.08e-01   50.600 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    2.048    0.000    2.048
T90     2.048    0.000    2.048
T50     2.048    0.000    2.048
Peak    2.048   -0.000    2.048

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  257.8386 +28.0865 0.0568   30.7 -156.3       0.0579     3.4  TRIG_00360857       
------------------------------------------
 
Foreground time interval of the image:
  0.000   2.048 (delta_t =   2.048 [sec])
Background time interval of the image:
-60.024  -9.024 (delta_t =  51.000 [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    0.000 sec. to    2.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52536     ( -0.510748   0.549373 )
Norm@50keV  : 2.51447E-03    ( -0.00088979   0.000879919 )
------------------------------------------------------------
# Chi-Squared =          55.40 using 59 PHA bins.
# Reduced chi-squared =         0.9719 for     57 degrees of freedom 
# Null hypothesis probability =   5.354815e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.316236 ( -0.10802  0.108654 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87191e-08 ( -1.79979e-08  1.86919e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.41696     ( 2.48821   3.34387 )
Epeak [keV] : 62.4386      ( -14.383 36.293 )
Norm@50keV  : 0.140485    ( -0.187141   1.02812 )
------------------------------------------------------------
# Chi-Squared =          50.60 using 59 PHA bins.
# Reduced chi-squared =         0.9035 for     56 degrees of freedom 
# Null hypothesis probability =   6.788731e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.268146 ( -0.08316  0.117893 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.41342e-08 ( -1.46293e-08  1.76912e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.21458   ( -15.2476   -5.50295 )
beta        : -9.99975    ( 12625.1   12635.1 )
Epeak [keV] : 61.5944      ( -14.1786 36.4673 )
Norm@50keV   : 0.294102    ( -0.294159   0.850796 )
------------------------------------------------------------
# Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.9195 for     55 degrees of freedom 
# Null hypothesis probability =   6.442070e-01
 
Photon flux (15-150 keV)    in 2.048 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52536     ( -0.510748   0.549373 )
Norm@50keV  : 2.51447E-03    ( -0.00088979   0.000879919 )
------------------------------------------------------------
# Chi-Squared =          55.40 using 59 PHA bins.
# Reduced chi-squared =         0.9719 for     57 degrees of freedom 
# Null hypothesis probability =   5.354815e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.316236 ( -0.10802  0.108654 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87191e-08 ( -1.79979e-08  1.86919e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.41696     ( 2.48821   3.34387 )
Epeak [keV] : 62.4386      ( -14.383 36.293 )
Norm@50keV  : 0.140485    ( -0.187141   1.02812 )
------------------------------------------------------------
# Chi-Squared =          50.60 using 59 PHA bins.
# Reduced chi-squared =         0.9035 for     56 degrees of freedom 
# Null hypothesis probability =   6.788731e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.268146 ( -0.08316  0.117893 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.41342e-08 ( -1.46293e-08  1.76912e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.06933   ( -3.27051   -2.46074 )
beta        : -9.99996    ( 80903.3   80913.3 )
Epeak [keV] : 61.5715      ( -13.5871 36.2351 )
Norm@50keV   : 0.260283    ( -0.276481   1.02629 )
------------------------------------------------------------
# Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.9196 for     55 degrees of freedom 
# Null hypothesis probability =   6.441840e-01
 
Photon flux (15-150 keV)    in 2.048 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Wed Aug 26 02:52:47 EDT 2009