batgrbproduct Analysis for Trigger=160640

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  9 17:01:45 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger160640/GCN5_download_cron
======================================================================

  Trigger: 00160640      Segment: 000

  BAT Trigger Time: 151598703.616   [s; MET]
      Trigger Stop: 151598704.64   [s; MET]
               UTC: 2005-10-21T14:45:03.820660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.554746508044   Dec: -23.8229871544646  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    33416
     Image Trigger?:     NO
     Rate S/N Ratio:     49.6890329952194  [ if not an image trigger ]
     Image S/N Ratio:    33416

  Flight Position:   [ source = BAT ]
    RA: 248.554746508044   Dec: -23.8229871544646  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 248.56885245246   Dec: -23.8791202181586  [deg; J2000]  
        { 16h 34m 16.5s , -23d 52' 44.8" }
         +/- 5.15633825959175 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.57188763250285 [arcmin] (formal 1-sigma fit error)
    SNR: 2.92070577281644
    RA  =  16h 34m 16.5s  (248.568852 deg.)
    Dec = -23d 52' 45" (-23.879120 deg.)
 
  Angular difference between Flight and Ground position is 3.455794 arcmin
 
  Partial Coding Fraction: 0.578125    [ including projection effects ]

  Duration
     T90: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     T50: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02399998903275 second)
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.021507   0.031315  -0.003219  -0.005567
           0.007640   0.006950   0.006324   0.005756 [error]
 Peak      0.021507   0.031315  -0.003219  -0.005567
           0.007640   0.006950   0.006324   0.005756 [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 8.72e-09 9.22e-09 6.92e-09 8.39e-09 2.80e-08 3.39e-08   erg/cm2
              Error 3.57e-09 3.51e-09 4.57e-09 1.18e-08 1.17e-08 1.81e-08   erg/cm2
Peak flux Power-law 2.80e-01 1.65e-01 6.16e-02 3.07e-02 5.22e-01 5.36e-01   ph/cm2/s
              Error 1.17e-01 6.13e-02 3.96e-02 4.05e-02 1.83e-01 1.89e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.48e-09 1.37e-08 2.86e-09 1.78e-11 2.41e-08 2.41e-08   erg/cm2
              Error 3.31e-09 4.88e-09 3.48e-09 6.01e-10 8.25e-09 8.25e-09   erg/cm2
Peak flux Cutoff-PL 2.29e-01 2.47e-01 2.95e-02 1.01e-04 5.06e-01 5.06e-01   ph/cm2/s
              Error 1.03e-01 8.34e-02 3.89e-02 3.05e-03 1.20e-01 1.61e-01   ph/cm2/s
 
Fluence        Band 7.77e-09 1.27e-08 5.16e-09 1.21e-09 2.31e-08 2.58e-08   erg/cm2
              Error 5.88e-09 4.33e-09 6.92e-09 8.48e-09 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 2.46e-01 2.25e-01 4.93e-02 1.55e-03 5.26e-01 5.32e-01   ph/cm2/s
              Error 1.90e-01 7.50e-02 3.10e-02 1.29e-02 1.69e-01 1.80e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.417    0.652    -      -           2.79e-03 1.41e-03   57.020 57
CPL  -2.457    0.000      31.2    7.6      3.88e+00 1.44e+01   51.162 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.417    0.652    -      -           2.79e-03 1.41e-03   57.020 57
CPL  -2.457    0.000      31.2    7.6      3.88e+00 1.44e+01   51.162 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    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  248.5689 -23.8791 0.0656   33.3  -44.9       0.0393     2.9  TRIG_00160640       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-60.616  -7.616 (delta_t =  53.000 [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    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.41662     ( -0.584435   0.719969 )
Norm@50keV  : 2.791771E-03    ( -1.383794E-03   1.440109E-03) )
------------------------------------------------------------
 Chi-Squared =      57.02027     using    59 PHA bins.
 Reduced chi-squared =      1.000356     for     57 degrees of freedom
 Null hypothesis probability = 0.474
 
Photon flux (15-150 keV)    in 1.024 sec: 0.521632 ( -0.18254  0.182559 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80107e-08 ( -1.11012e-08  1.22386e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.45671     (     )
Epeak [keV] : 31.1818      ( -6.89692 8.33204 )
Norm@50keV  : 3.87754    ( -8.38089   20.4988 )
------------------------------------------------------------
 Chi-Squared =      51.16230     using    59 PHA bins.
 Reduced chi-squared =     0.9136125     for     56 degrees of freedom
 Null hypothesis probability = 0.658
 
Photon flux (15-150 keV)    in 1.024 sec: 0.506244 ( -0.157892  0.08279 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41013e-08 ( -7.82387e-09  8.67195e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.53107   ( -8.46893   6.53106 )
beta        : -9.31722    ( -0.682778   7.16952 )
Epeak [keV] : 15.3793      ( -15.2793 33.8078 )
Norm@50keV   : 1.253015E-02    ( -10.6482   257.691 )
------------------------------------------------------------
 Chi-Squared =      54.80026     using    59 PHA bins.
 Reduced chi-squared =     0.9963684     for     55 degrees of freedom
 Null hypothesis probability = 0.482
 
Photon flux (15-150 keV)    in 1.024 sec: 0.526183 ( -0.167405  0.169607 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31284e-08 ( -7.26047e-09  6.5835e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.41662     ( -0.584435   0.719969 )
Norm@50keV  : 2.791771E-03    ( -1.383794E-03   1.440109E-03) )
------------------------------------------------------------
 Chi-Squared =      57.02027     using    59 PHA bins.
 Reduced chi-squared =      1.000356     for     57 degrees of freedom
 Null hypothesis probability = 0.474
 
Photon flux (15-150 keV)    in 1.024 sec: 0.521632 ( -0.18254  0.182559 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80107e-08 ( -1.11012e-08  1.22386e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.45671     (     )
Epeak [keV] : 31.1818      ( -6.89692 8.33204 )
Norm@50keV  : 3.87754    ( -8.38089   20.4988 )
------------------------------------------------------------
 Chi-Squared =      51.16230     using    59 PHA bins.
 Reduced chi-squared =     0.9136125     for     56 degrees of freedom
 Null hypothesis probability = 0.658
 
Photon flux (15-150 keV)    in 1.024 sec: 0.506244 ( -0.157892  0.08279 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41013e-08 ( -7.82387e-09  8.67195e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.53107   ( -8.46893   6.53106 )
beta        : -9.31722    ( -0.682778   7.16952 )
Epeak [keV] : 15.3793      ( -15.2793 33.8078 )
Norm@50keV   : 1.253015E-02    ( -10.6482   257.691 )
------------------------------------------------------------
 Chi-Squared =      54.80026     using    59 PHA bins.
 Reduced chi-squared =     0.9963684     for     55 degrees of freedom
 Null hypothesis probability = 0.482
 
Photon flux (15-150 keV)    in 1.024 sec: 0.526183 ( -0.167405  0.169607 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.31284e-08 ( -7.26047e-09  6.5835e-09 ) ergs/cm2
 
Plot creation:
Wed Jan  9 17:07:38 EST 2008