batgrbproduct Analysis for Trigger=228006

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Jan  2 02:59:29 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger228006/GCN5_download_cron
======================================================================

  Trigger: 00228006      Segment: 000

  BAT Trigger Time: 179029865.28   [s; MET]
      Trigger Stop: 179029865.792   [s; MET]
               UTC: 2006-09-04T02:31:03.857720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 58.2130876183086   Dec: -0.720064748212814  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.68
     Image Trigger?:     NO
     Rate S/N Ratio:     15.52417469626  [ if not an image trigger ]
     Image S/N Ratio:    8.68

  Flight Position:   [ source = BAT ]
    RA: 58.2130876183086   Dec: -0.720064748212814  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 58.218534801125   Dec: -0.725488045596521  [deg; J2000]  
        { 03h 52m 52.4s , -00d 43' 31.8" }
         +/- 0.914892313424495 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.321570336276019 [arcmin] (formal 1-sigma fit error)
    SNR: 34.5385518672419
    RA  =   3h 52m 52.4s  (58.218535 deg.)
    Dec =   0d 43' 32" (-0.725488 deg.)
 
  Angular difference between Flight and Ground position is 0.461178 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 171.467999994755 +/- 11.3430592104484
        Measured from: 0.340000003576279
                   to: 171.807999998331     [s; relative to TRIGTIME]
     T50: 38.1119999885559 +/- 107.807273459423
        Measured from: 2.34400001168251
                   to: 40.4560000002384     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.15599998831749     
                   to: 2.15599998831749     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.944000005722046     
                   to: 183.50799998641     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.816099   1.059758   0.657224   0.169783
           0.069521   0.070345   0.061929   0.054470 [error]
 Peak      0.071598   0.101747   0.104214   0.025246
           0.007794   0.008632   0.008169   0.006290 [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 2.60e-07 4.35e-07 5.54e-07 1.41e-06 1.64e-06 2.66e-06   erg/cm2
              Error 3.38e-08 3.45e-08 6.13e-08 3.32e-07 1.45e-07 3.82e-07   erg/cm2
Peak flux Power-law 6.42e-01 7.74e-01 6.74e-01 1.01e+00 2.44e+00 3.10e+00   ph/cm2/s
              Error 1.06e-01 7.71e-02 6.47e-02 2.08e-01 2.11e-01 2.72e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.41e-07 4.58e-07 5.66e-07 6.86e-07 1.58e-06 1.95e-06   erg/cm2
              Error 4.00e-08 4.41e-08 6.68e-08 5.81e-07 1.63e-07 6.23e-07   erg/cm2
Peak flux Cutoff-PL 6.18e-01 7.83e-01 6.89e-01 8.43e-01 2.43e+00 2.94e+00   ph/cm2/s
              Error 1.31e-01 6.34e-02 7.99e-02 3.68e-01 2.60e-01 4.30e-01   ph/cm2/s
 
Fluence        Band 2.39e-07 4.57e-07 5.64e-07 6.85e-07 1.58e-06 2.25e-06   erg/cm2
              Error 3.96e-08 4.40e-08 6.67e-08 6.17e-07 1.63e-07 0.00e+00   erg/cm2
Peak flux      Band 6.14e-01 7.84e-01 6.88e-01 9.03e-01 2.43e+00 2.97e+00   ph/cm2/s
              Error 1.15e-01 8.39e-02 7.92e-02 1.78e-01 2.12e-01 2.74e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.652    0.142    -      -           9.56e-04 7.87e-05   46.087 57
CPL   1.055    0.000      76.2 4970.8      1.94e-03 1.40e-03   43.971 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.199    0.148    -      -           2.08e-02 1.73e-03   57.636 57
CPL   1.024    0.479     315.2 5000.0      2.51e-02 1.46e-02   57.385 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: 8.384000 sec.
T50 in the 50-300 keV band: 3.008000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  184.452   -0.944  183.508
T90   171.468    0.340  171.808
T50    38.112    2.344   40.456
Peak    1.000    1.156    2.156

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   58.2185  -0.7255 0.0056   26.2   67.7       1.5316    34.5  TRIG_00228006       
------------------------------------------
 
Foreground time interval of the image:
 -0.944   8.121 (delta_t =   9.065 [sec])
Background time interval of the image:
-239.280  -0.944 (delta_t = 238.336 [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   -0.944 sec. to  183.508 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65209     ( -0.140866   0.143082 )
Norm@50keV  : 9.559715E-04    ( -7.903529E-05   7.836439E-05) )
------------------------------------------------------------
 Chi-Squared =      46.08673     using    59 PHA bins.
 Reduced chi-squared =     0.8085391     for     57 degrees of freedom
 Null hypothesis probability = 0.849
 
Photon flux (15-150 keV)    in 184.5 sec: 0.124912 ( -0.009903  0.00992 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.64034e-06 ( -1.44146e-07  1.44895e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.944 sec. to  183.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05524     (     )
Epeak [keV] : 76.2246      ( -29.7919 9911.89 )
Norm@50keV  : 1.938828E-03    ( -6.473148E-04   2.160462E-03) )
------------------------------------------------------------
 Chi-Squared =      43.97115     using    59 PHA bins.
 Reduced chi-squared =     0.7851990     for     56 degrees of freedom
 Null hypothesis probability = 0.878
 
Photon flux (15-150 keV)    in 184.5 sec: 0.122027 ( -0.010469  0.010403 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57699e-06 ( -1.63264e-07  1.62283e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.944 sec. to  183.508 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.10068   ( -0.613132   0.595631 )
beta        : -9.18501    ( -0.814986   7.59313 )
Epeak [keV] : 78.6003      ( -20.2551 9921.40 )
Norm@50keV   : 1.846447E-03    ( -1.846447E-03   1.868077E-03) )
------------------------------------------------------------
 Chi-Squared =      43.90238     using    59 PHA bins.
 Reduced chi-squared =     0.7982251     for     55 degrees of freedom
 Null hypothesis probability = 0.859
 
Photon flux (15-150 keV)    in 184.5 sec: 0.122035 ( -0.010487  0.010444 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57553e-06 ( -1.63068e-07  1.62712e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.156 sec. to    2.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19885     ( -0.149068   0.147824 )
Norm@50keV  : 2.081756E-02    ( -1.734482E-03   1.734219E-03) )
------------------------------------------------------------
 Chi-Squared =      57.63620     using    59 PHA bins.
 Reduced chi-squared =      1.011161     for     57 degrees of freedom
 Null hypothesis probability = 0.452
 
Photon flux (15-150 keV)    in 1.000 sec: 2.44315 ( -0.21093  0.21141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.11444e-07 ( -1.9604e-08  1.9337e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.156 sec. to    2.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02355     ( -0.645127   0.312767 )
Epeak [keV] : 315.187      ( -315.177 9684.81 )
Norm@50keV  : 2.506392E-02    ( -5.805459E-03   2.342555E-02) )
------------------------------------------------------------
 Chi-Squared =      57.38482     using    59 PHA bins.
 Reduced chi-squared =      1.024729     for     56 degrees of freedom
 Null hypothesis probability = 0.424
 
Photon flux (15-150 keV)    in 1.000 sec: 2.42903 ( -0.20417  0.31567 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10011e-07 ( -2.0148e-08  2.0003e-08 ) ergs/cm2
 
Band function
Time interval is from    1.156 sec. to    2.156 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.936752   ( -9.06325   5.92888 )
beta        : -1.19867    ( -8.63681   0.306463 )
Epeak [keV] : 56.9245      ( -222.462 9777.44 )
Norm@50keV   : 3.774271E-02    ( -8.259751E-03   1376.01 )
------------------------------------------------------------
 Chi-Squared =      57.63647     using    59 PHA bins.
 Reduced chi-squared =      1.047936     for     55 degrees of freedom
 Null hypothesis probability = 0.378
 
Photon flux (15-150 keV)    in 1.000 sec: 2.42552 ( -0.21146  0.21286 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09883e-07 ( -2.0182e-08  2.0052e-08 ) ergs/cm2
 
Plot creation:
Wed Jan  2 03:22:33 EST 2008