batgrbproduct Analysis for Trigger=202442

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 15:00:28 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger202442/SDC
======================================================================

  Trigger: 00202442      Segment: 000

  BAT Trigger Time: 164761222.208   [s; MET]
      Trigger Stop: 164761223.232   [s; MET]
               UTC: 2006-03-22T23:00:21.120860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 274.244501992693   Dec: -36.6974174803287  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.93
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6491106406735  [ if not an image trigger ]
     Image S/N Ratio:    6.93

  Flight Position:   [ source = BAT ]
    RA: 274.244501992693   Dec: -36.6974174803287  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 274.232513884341   Dec: -36.7089853798258  [deg; J2000]  
        { 18h 16m 55.8s , -36d 42' 32.3" }
         +/- 1.08341347954291 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.357192259072513 [arcmin] (formal 1-sigma fit error)
    SNR: 27.1276598015886
    RA  =  18h 16m 55.8s  (274.232514 deg.)
    Dec = -36d 42' 32" (-36.708985 deg.)
 
  Angular difference between Flight and Ground position is 0.902386 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 221.488000035286 +/- 23.9916372144022
        Measured from: -19.6120000183582
                   to: 201.876000016928     [s; relative to TRIGTIME]
     T50: 170.908000022173 +/- 3.60379579008613
        Measured from: 15.1839999854565
                   to: 186.092000007629     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 182.187999993563     
                   to: 183.187999993563     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -51.6240000128746     
                   to: 248.203999996185     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.280497   3.388941   2.310496   0.495935
           0.122683   0.109637   0.093639   0.079996 [error]
 Peak      0.064646   0.096969   0.066935   0.013800
           0.007929   0.007574   0.006689   0.004828 [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 7.89e-07 1.38e-06 1.85e-06 5.09e-06 5.39e-06 9.12e-06   erg/cm2
              Error 6.14e-08 6.27e-08 9.41e-08 5.82e-07 2.28e-07 6.37e-07   erg/cm2
Peak flux Power-law 7.34e-01 6.95e-01 4.57e-01 4.65e-01 2.08e+00 2.35e+00   ph/cm2/s
              Error 1.16e-01 6.77e-02 5.40e-02 1.12e-01 1.96e-01 2.15e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.15e-07 1.43e-06 1.92e-06 2.77e-06 5.22e-06 6.86e-06   erg/cm2
              Error 7.63e-08 7.20e-08 1.06e-07 1.07e-06 2.56e-07 1.09e-06   erg/cm2
Peak flux Cutoff-PL 6.38e-01 7.40e-01 4.86e-01 2.29e-01 2.01e+00 2.09e+00   ph/cm2/s
              Error 1.41e-01 8.12e-02 6.36e-02 1.56e-01 2.05e-01 2.59e-01   ph/cm2/s
 
Fluence        Band 6.61e-07 1.48e-06 1.83e-06 4.30e-06 5.22e-06 8.35e-06   erg/cm2
              Error 8.57e-08 8.33e-08 9.37e-08 7.05e-07 2.43e-07 7.39e-07   erg/cm2
Peak flux      Band 6.38e-01 7.39e-01 4.86e-01 2.29e-01 2.01e+00 2.09e+00   ph/cm2/s
              Error 1.41e-01 8.13e-02 6.36e-02 1.55e-01 2.05e-01 2.59e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.577    0.075    -      -           1.92e-03 7.73e-05   64.632 57
CPL   1.061    0.323      95.5   53.7      3.38e-03 1.15e-03   57.540 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.605    0.160    -      -           1.61e-02 1.52e-03   50.337 57
CPL   0.869    0.712      77.9   93.3      3.76e-02 3.58e-02   46.533 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: 213.824000 sec.
T50 in the 50-300 keV band: 171.200000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  299.828  -51.624  248.204
T90   221.488  -19.612  201.876
T50   170.908   15.184  186.092
Peak    1.000  182.188  183.188

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  274.2325 -36.7090 0.0071   30.6  -15.2       9.1084    27.1  TRIG_00202442       
------------------------------------------
 
Foreground time interval of the image:
-51.624 248.204 (delta_t = 299.828 [sec])
Background time interval of the image:
-239.208 -51.624 (delta_t = 187.584 [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  -51.624 sec. to  248.204 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57697     ( -7.520080E-02   7.510996E-02) )
Norm@50keV  : 1.916858E-03    ( -7.730792E-05   7.726578E-05) )
------------------------------------------------------------
 Chi-Squared =      64.63207     using    59 PHA bins.
 Reduced chi-squared =      1.133896     for     57 degrees of freedom
 Null hypothesis probability = 0.228
 
Photon flux (15-150 keV)    in 299.8 sec: 0.244598 ( -0.01082  0.010864 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38962e-06 ( -2.27698e-07  2.29227e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -51.624 sec. to  248.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06119     ( -0.291195   0.354859 )
Epeak [keV] : 95.5335      ( -17.4759 89.9431 )
Norm@50keV  : 3.376896E-03    ( -1.067179E-03   1.241717E-03) )
------------------------------------------------------------
 Chi-Squared =      57.53988     using    59 PHA bins.
 Reduced chi-squared =      1.027498     for     56 degrees of freedom
 Null hypothesis probability = 0.418
 
Photon flux (15-150 keV)    in 299.8 sec: 0.237281 ( -0.01171  0.011753 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.22237e-06 ( -2.58158e-07  2.5441e-07 ) ergs/cm2
 
Band function
Time interval is from  -51.624 sec. to  248.204 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.735353   ( -0.583385   3.82287 )
beta        : -1.76086    ( -8.23914   0.154970 )
Epeak [keV] : 63.2679      ( -35.8977 85.3545 )
Norm@50keV   : 5.558970E-03    ( -1.865937E-02   10.4750 )
------------------------------------------------------------
 Chi-Squared =      56.42484     using    59 PHA bins.
 Reduced chi-squared =      1.025906     for     55 degrees of freedom
 Null hypothesis probability = 0.421
 
Photon flux (15-150 keV)    in 299.8 sec: 0.234433 ( -0.012351  0.010582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.21865e-06 ( -2.49374e-07  2.37532e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  182.188 sec. to  183.188 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60535     ( -0.158585   0.161301 )
Norm@50keV  : 1.612898E-02    ( -1.525240E-03   1.516737E-03) )
------------------------------------------------------------
 Chi-Squared =      50.33721     using    59 PHA bins.
 Reduced chi-squared =     0.8831089     for     57 degrees of freedom
 Null hypothesis probability = 0.721
 
Photon flux (15-150 keV)    in 1.000 sec: 2.07610 ( -0.19603  0.19653 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50694e-07 ( -1.5092e-08  1.5303e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  182.188 sec. to  183.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.868574     ( -0.773117   0.651414 )
Epeak [keV] : 77.9358      ( -18.8975 167.789 )
Norm@50keV  : 3.758504E-02    ( -1.945887E-02   5.206729E-02) )
------------------------------------------------------------
 Chi-Squared =      46.53325     using    59 PHA bins.
 Reduced chi-squared =     0.8309509     for     56 degrees of freedom
 Null hypothesis probability = 0.812
 
Photon flux (15-150 keV)    in 1.000 sec: 2.00910 ( -0.20498  0.20516 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44627e-07 ( -1.6674e-08  1.6272e-08 ) ergs/cm2
 
Band function
Time interval is from  182.188 sec. to  183.188 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.868512   ( -0.651526   0.774007 )
beta        : -9.11986    ( -0.880136   7.49314 )
Epeak [keV] : 77.8953      ( -18.8710 169.031 )
Norm@50keV   : 3.759421E-02    ( -1.946092E-02   5.222082E-02) )
------------------------------------------------------------
 Chi-Squared =      46.53330     using    59 PHA bins.
 Reduced chi-squared =     0.8460600     for     55 degrees of freedom
 Null hypothesis probability = 0.785
 
Photon flux (15-150 keV)    in 1.000 sec: 2.00934 ( -0.20522  0.20493 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44343e-07 ( -1.6511e-08  1.6414e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 15:22:31 EST 2007