batgrbproduct Analysis for Trigger=291524

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 13:36:16 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger291524/GCN5_download_hand
======================================================================

  Trigger: 00291524      Segment: 000

  BAT Trigger Time: 211881397.504   [s; MET]
      Trigger Stop: 211881398.528   [s; MET]
               UTC: 2007-09-19T07:56:35.269800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 287.799605098506   Dec: 0.586431638279218  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.93
     Image Trigger?:     NO
     Rate S/N Ratio:     12.6491106406735  [ if not an image trigger ]
     Image S/N Ratio:    7.93

  Flight Position:   [ source = BAT ]
    RA: 287.799605098506   Dec: 0.586431638279218  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 287.820889126746   Dec: 0.549469806015521  [deg; J2000]  
        { 19h 11m 17.0s , +00d 32' 58.1" }
         +/- 2.58931599819645 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.63981257998216 [arcmin] (formal 1-sigma fit error)
    SNR: 7.81365112292156
    RA  =  19h 11m 17.0s  (287.820889 deg.)
    Dec =   0d 32' 58" (0.549470 deg.)
 
  Angular difference between Flight and Ground position is 2.559084 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 5 +/- 1.4142135623731
        Measured from: -1.50400000810623
                   to: 3.49599999189377     [s; relative to TRIGTIME]
     T50: 2 +/- 1.4142135623731
        Measured from: -0.504000008106232
                   to: 1.49599999189377     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.504000008106232     
                   to: 0.495999991893768     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.50400000810623     
                   to: 3.49599999189377     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.150149   0.019007   0.012602   0.001831
           0.011393   0.010380   0.008855   0.007392 [error]
 Peak      0.039152   0.009447   0.000127   0.002335
           0.005184   0.004595   0.003988   0.003312 [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 4.30e-08 8.48e-09 8.25e-10 8.76e-11 5.23e-08 5.24e-08   erg/cm2
              Error 7.23e-09 4.45e-09 1.06e-09 2.40e-10 1.02e-08 1.03e-08   erg/cm2
Peak flux Power-law 4.25e-01 5.79e-02 3.51e-03 2.26e-04 4.86e-01 4.86e-01   ph/cm2/s
              Error 9.38e-02 4.08e-02 6.76e-03 1.00e-03 1.17e-01 1.17e-01   ph/cm2/s
 
Fluence   Cutoff-PL 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 Cutoff-PL 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
 
Fluence        Band 4.21e-08 8.40e-09 8.23e-10 8.50e-11 5.24e-08 5.42e-08   erg/cm2
              Error 3.61e-09 1.43e-10 9.47e-09 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.24e-01 5.79e-02 3.50e-03 2.24e-04 4.86e-01 4.86e-01   ph/cm2/s
              Error 9.38e-02 4.08e-02 6.75e-03 9.91e-04 1.17e-01 1.17e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    5.118    0.959    -      -           1.96e-04 1.84e-04   72.449 57
CPL   1.804    0.000       1.1    0.0      1.73e-01 0.00e+00   72.905  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.696    1.372    -      -           4.29e-04 0.00e+00   69.222 57
CPL   1.811    0.000       1.2    0.0      1.67e-01 0.00e+00   70.193 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    5.000   -1.504    3.496
T90     5.000   -1.504    3.496
T50     2.000   -0.504    1.496
Peak    1.000   -0.504    0.496

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  287.8209  +0.5495 0.0246    5.7 -116.2       0.1902     7.8  TRIG_00291524       
------------------------------------------
 
Foreground time interval of the image:
 -1.504   3.496 (delta_t =   5.000 [sec])
Background time interval of the image:
-10.504  -1.504 (delta_t =   9.000 [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   -1.504 sec. to    3.496 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.11839     ( -0.648661   1.26865 )
Norm@50keV  : 1.959034E-04    ( -1.959034E-04   1.724405E-04) )
------------------------------------------------------------
 Chi-Squared =      72.44920     using    59 PHA bins.
 Reduced chi-squared =      1.271039     for     57 degrees of freedom
 Null hypothesis probability = 8.153E-02
 
Photon flux (15-150 keV)    in 5.000 sec: 0.335852 ( -0.057989  0.057992 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.2334e-08 ( -1.0046e-08  1.04485e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.504 sec. to    3.496 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80444     (     )
Epeak [keV] : 1.05659      (   )
Norm@50keV  : 0.173154    (     )
------------------------------------------------------------
 Chi-Squared =      72.90500     using    59 PHA bins.
 but latest trial   1.23457     gives Chi-Squared =  0.133163
 Reduced chi-squared =      1.301875     for     56 degrees of freedom
 Null hypothesis probability = 6.404E-02
 
Photon flux (15-150 keV)    in 5.000 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -1.504 sec. to    3.496 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.49653   ( -0.511520   0.738807 )
beta        : -8.44761    ( -4.31242   1.22881 )
Epeak [keV] : 6.39821      ( -6.29821 5.16666 )
Norm@50keV   : 2.414723E-02    ( -18.5897   536.628 )
------------------------------------------------------------
 Chi-Squared =      90.26847     using    59 PHA bins.
 Reduced chi-squared =      1.641245     for     55 degrees of freedom
 Null hypothesis probability = 1.911E-03
 
Photon flux (15-150 keV)    in 5.000 sec: 0.335510 ( -0.057954  0.057954 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.236e-08 ( -9.83425e-09  9.1055e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.504 sec. to    0.496 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.69575     ( -0.822646   1.92156 )
Norm@50keV  : 4.294161E-04    (     )
------------------------------------------------------------
 Chi-Squared =      69.22172     using    59 PHA bins.
 Reduced chi-squared =      1.214416     for     57 degrees of freedom
 Null hypothesis probability = 0.129
 
Photon flux (15-150 keV)    in 1.000 sec: 0.486204 ( -0.117121  0.116813 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55125e-08 ( -4.3847e-09  4.8479e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.504 sec. to    0.496 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81060     (     )
Epeak [keV] : 1.15236      (   )
Norm@50keV  : 0.166964    (     )
------------------------------------------------------------
 Chi-Squared =      70.19309     using    59 PHA bins.
 Reduced chi-squared =      1.253448     for     56 degrees of freedom
 Null hypothesis probability = 9.613E-02
 
Photon flux (15-150 keV)    in 1.000 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.504 sec. to    0.496 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.52041   ( -1.47959   3.55748 )
beta        : -5.04260    ( -1.50503   1.13042 )
Epeak [keV] : 292.423      ( -292.323 9707.58 )
Norm@50keV   : 4.111885E-02    ( -3.333165E-02   8.291204E-02) )
------------------------------------------------------------
 Chi-Squared =      69.00829     using    59 PHA bins.
 Reduced chi-squared =      1.254696     for     55 degrees of freedom
 Null hypothesis probability = 9.698E-02
 
Photon flux (15-150 keV)    in 1.000 sec: 0.485759 ( -0.117103  0.11677 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54685e-08 ( -3.9914e-09  3.4188e-09 ) ergs/cm2
 
Plot creation:
Fri Dec 14 13:46:03 EST 2007