batgrbproduct Analysis for Trigger=292826

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 16:11:41 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger292826/SDC
======================================================================

  Trigger: 00292826      Segment: 000

  BAT Trigger Time: 212949110.336   [s; MET]
      Trigger Stop: 212949112.384   [s; MET]
               UTC: 2007-10-01T16:31:48.074080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 149.76568444715   Dec: -59.7508699680511  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.13
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8062484748657  [ if not an image trigger ]
     Image S/N Ratio:    7.13

  Flight Position:   [ source = BAT ]
    RA: 149.76568444715   Dec: -59.7508699680511  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 149.71257944178   Dec: -59.7622557165796  [deg; J2000]  
        { 09h 58m 51.0s , -59d 45' 44.1" }
         +/- 2.00532593753489 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.927745595316571 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2570751160056
    RA  =   9h 58m 51.0s  (149.712579 deg.)
    Dec = -59d 45' 44" (-59.762256 deg.)
 
  Angular difference between Flight and Ground position is 1.744208 arcmin
 
  Partial Coding Fraction: 0.8515625    [ including projection effects ]

  Duration
     T90: 57.4880000054836 +/- 3.9323723364523
        Measured from: 0.907999992370605
                   to: 58.3959999978542     [s; relative to TRIGTIME]
     T50: 43.636000007391 +/- 2.08556564065188
        Measured from: 6.57600000500679
                   to: 50.2120000123978     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 48.1400000154972     
                   to: 49.1400000154972     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0439999997615814     
                   to: 61.8000000119209     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.461102   0.542246   0.314441   0.094773
           0.039780   0.039583   0.034521   0.029700 [error]
 Peak      0.038798   0.044499   0.018880   0.005041
           0.005379   0.005334   0.004561   0.003739 [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 1.32e-07 2.13e-07 2.59e-07 6.16e-07 7.80e-07 1.22e-06   erg/cm2
              Error 1.86e-08 1.85e-08 3.40e-08 1.70e-07 7.87e-08 2.00e-07   erg/cm2
Peak flux Power-law 3.70e-01 2.91e-01 1.54e-01 1.18e-01 8.68e-01 9.32e-01   ph/cm2/s
              Error 7.48e-02 4.23e-02 3.57e-02 5.13e-02 1.26e-01 1.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.27e-07 2.21e-07 2.61e-07 3.58e-07 7.57e-07 9.70e-07   erg/cm2
              Error 2.15e-08 1.80e-08 3.60e-08 2.56e-07 8.92e-08 3.30e-07   erg/cm2
Peak flux Cutoff-PL 3.20e-01 3.48e-01 1.49e-01 2.10e-02 8.35e-01 8.38e-01   ph/cm2/s
              Error 8.71e-02 6.16e-02 4.71e-02 3.60e-02 1.28e-01 1.32e-01   ph/cm2/s
 
Fluence        Band 9.84e-07 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 3.19e-01 3.48e-01 1.49e-01 2.06e-02 8.34e-01 8.37e-01   ph/cm2/s
              Error 8.27e-02 4.04e-02 3.26e-02 4.60e-02 1.24e-01 1.23e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.719    0.163    -      -           1.36e-03 1.30e-04   43.568 57
CPL   1.304    0.590      78.3 4974.6      2.26e-03 1.80e-03   42.758  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.920    0.255    -      -           6.00e-03 1.07e-03   50.263 57
CPL   0.335    1.445      43.5   13.9      4.97e-02 2.42e-01   44.779 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: 54.592000 sec.
T50 in the 50-300 keV band: 42.688000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   61.844   -0.044   61.800
T90    57.488    0.908   58.396
T50    43.636    6.576   50.212
Peak    1.000   48.140   49.140

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  149.7126 -59.7623 0.0172   14.9   63.4       0.6653    11.3  TRIG_00292826       
------------------------------------------
 
Foreground time interval of the image:
 -0.044  34.269 (delta_t =  34.313 [sec])
Background time interval of the image:
-194.131  -0.044 (delta_t = 194.087 [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   -0.044 sec. to   61.800 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71925     ( -0.160835   0.164746 )
Norm@50keV  : 1.364316E-03    ( -1.313672E-04   1.294420E-04) )
------------------------------------------------------------
 Chi-Squared =      43.56824     using    59 PHA bins.
 Reduced chi-squared =     0.7643552     for     57 degrees of freedom
 Null hypothesis probability = 0.905
 
Photon flux (15-150 keV)    in 61.84 sec: 0.182433 ( -0.015976  0.015995 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.80087e-07 ( -7.82771e-08  7.92047e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.044 sec. to   61.800 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30431     ( -0.628630   0.551793 )
Epeak [keV] : 78.2805      ( -27.5643 9921.72 )
Norm@50keV  : 2.259630E-03    ( -1.003625E-03   2.589563E-03) )
------------------------------------------------------------
 Chi-Squared =      42.75820     using    59 PHA bins.
 but latest trial   31.3952     gives Chi-Squared =   3.99365
 Reduced chi-squared =     0.7635393     for     56 degrees of freedom
 Null hypothesis probability = 0.904
 
Photon flux (15-150 keV)    in 61.84 sec: 0.179596 ( -0.016815  0.016657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.56878e-07 ( -8.95196e-08  8.89692e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.044 sec. to   61.800 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.27956   ( -0.577473   0.607397 )
beta        : -8.75049    ( -1.24951   7.16681 )
Epeak [keV] : 76.3971      ( -23.3377 9923.60 )
Norm@50keV   : 2.338632E-03    ( -1.112517E-03   2.528939E-03) )
------------------------------------------------------------
 Chi-Squared =      42.78316     using    59 PHA bins.
 Reduced chi-squared =     0.7778756     for     55 degrees of freedom
 Null hypothesis probability = 0.885
 
Photon flux (15-150 keV)    in 61.84 sec: 0.179593 ( -0.016861  0.016781 ) 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   48.140 sec. to   49.140 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92015     ( -0.246234   0.264295 )
Norm@50keV  : 5.998535E-03    ( -1.085810E-03   1.060436E-03) )
------------------------------------------------------------
 Chi-Squared =      50.26295     using    59 PHA bins.
 Reduced chi-squared =     0.8818061     for     57 degrees of freedom
 Null hypothesis probability = 0.724
 
Photon flux (15-150 keV)    in 1.000 sec: 0.868296 ( -0.126312  0.126325 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.51211e-08 ( -9.5287e-09  9.8816e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   48.140 sec. to   49.140 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.335040     ( -1.68411   1.20501 )
Epeak [keV] : 43.5268      ( -9.68106 18.1807 )
Norm@50keV  : 4.973643E-02    ( -3.951731E-02   0.443874 )
------------------------------------------------------------
 Chi-Squared =      44.77890     using    59 PHA bins.
 Reduced chi-squared =     0.7996232     for     56 degrees of freedom
 Null hypothesis probability = 0.859
 
Photon flux (15-150 keV)    in 1.000 sec: 0.835079 ( -0.128077  0.12833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.8958e-08 ( -9.4431e-09  1.04674e-08 ) ergs/cm2
 
Band function
Time interval is from   48.140 sec. to   49.140 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.352136   ( -1.18863   1.57172 )
beta        : -9.34945    ( -0.650553   7.28244 )
Epeak [keV] : 43.5719      ( -9.05610 18.1714 )
Norm@50keV   : 4.860378E-02    ( -9.483188E-03   0.479224 )
------------------------------------------------------------
 Chi-Squared =      44.77938     using    59 PHA bins.
 Reduced chi-squared =     0.8141705     for     55 degrees of freedom
 Null hypothesis probability = 0.836
 
Photon flux (15-150 keV)    in 1.000 sec: 0.834439 ( -0.118801  0.128988 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.88828e-08 ( -6.9596e-09  1.04941e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 16:34:42 EST 2007