batgrbproduct Analysis for Trigger=306379

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sun Mar 16 07:12:58 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306379/GCN5_download_cron
======================================================================

  Trigger: 00306379      Segment: 000

  BAT Trigger Time: 227288944   [s; MET]
      Trigger Stop: 227289264   [s; MET]
               UTC: 2008-03-15T15:49:01.354820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 274.67915274337   Dec: -17.0681295626344  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.02
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.02

  Flight Position:   [ source = BAT ]
    RA: 274.67915274337   Dec: -17.0681295626344  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 274.707084695237   Dec: -17.0627764367996  [deg; J2000]  
        { 18h 18m 49.7s , -17d 03' 46.0" }
         +/- 3.52191511590048 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.25775075385301 [arcmin] (formal 1-sigma fit error)
    SNR: 5.03507203004684
    RA  =  18h 18m 49.7s  (274.707085 deg.)
    Dec =  -17d  3' 46" (-17.062776 deg.)
 
  Angular difference between Flight and Ground position is 1.634005 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]
     T50: 320 +/- 
        Measured from: 0
                   to: 320     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 320 second)
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 320     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.537688   0.305109   0.095582  -0.021656
           0.073294   0.064350   0.055082   0.050375 [error]
 Peak      0.537688   0.305109   0.095582  -0.021656
           0.073294   0.064350   0.055082   0.050375 [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 1.63e-07 1.37e-07 7.89e-08 6.74e-08 4.09e-07 4.47e-07   erg/cm2
              Error 3.48e-08 3.30e-08 3.94e-08 6.37e-08 9.67e-08 1.31e-07   erg/cm2
Peak flux Power-law 2.95e-02 1.39e-02 4.01e-03 1.45e-03 4.83e-02 4.89e-02   ph/cm2/s
              Error 6.45e-03 3.20e-03 1.94e-03 1.55e-03 8.83e-03 9.01e-03   ph/cm2/s
 
Fluence   Cutoff-PL 1.62e-07 1.46e-07 6.14e-08 1.23e-08 3.79e-07 3.82e-07   erg/cm2
              Error 3.62e-08 3.93e-08 5.41e-08 6.88e-08 1.04e-07 1.43e-07   erg/cm2
Peak flux Cutoff-PL 2.91e-02 1.49e-02 3.22e-03 3.31e-04 4.75e-02 4.75e-02   ph/cm2/s
              Error 6.72e-03 3.89e-03 2.92e-03 1.41e-03 8.85e-03 6.76e-03   ph/cm2/s
 
Fluence        Band 1.60e-07 1.46e-07 6.13e-08 1.22e-08 3.78e-07 3.80e-07   erg/cm2
              Error 3.58e-08 3.88e-08 4.51e-08 6.63e-08 9.64e-08 1.09e-07   erg/cm2
Peak flux      Band 2.95e-02 1.46e-02 3.11e-03 7.80e-04 4.78e-02 4.81e-02   ph/cm2/s
              Error 6.53e-03 3.35e-03 2.81e-03 8.68e-04 8.87e-03 9.01e-03   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.800    0.464    -      -           2.02e-04 7.50e-05   60.314 57
CPL   1.589    0.000      10.6   12.5      1.35e-03 2.09e-01   59.803  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.800    0.464    -      -           2.02e-04 7.50e-05   60.314 57
CPL   1.589    0.000      10.6   12.5      1.35e-03 2.08e-01   59.803  0
 
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  320.000    0.000  320.000
T90   320.000    0.000  320.000
T50   320.000    0.000  320.000
Peak  320.000    0.000  320.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  274.7071 -17.0628 0.0383   11.8 -151.6       0.8936     5.0  TRIG_00306379       
------------------------------------------
 
Foreground time interval of the image:
  0.000 183.080 (delta_t = 183.080 [sec])
Background time interval of the image:

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  183.080 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.79950     ( -0.425058   0.503118 )
Norm@50keV  : 2.022694E-04    ( -7.319433E-05   7.677829E-05) )
------------------------------------------------------------
 Chi-Squared =      60.31429     using    59 PHA bins.
 Reduced chi-squared =      1.058145     for     57 degrees of freedom
 Null hypothesis probability = 0.357
 
Photon flux (15-150 keV)    in 183.1 sec: 4.827547E-02 ( -0.00883181  0.00883646 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.0873e-07 ( -9.30862e-08  1.00361e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  183.080 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58881     (     )
Epeak [keV] : 10.5947      ( -5.00165 20.0437 )
Norm@50keV  : 1.347980E-03    ( -9.770541E-04   0.416215 )
------------------------------------------------------------
 Chi-Squared =      59.80338     using    59 PHA bins.
 but latest trial   1.24035     gives Chi-Squared =  3.173828E-03
 but latest trial   25.0452     gives Chi-Squared =   2.67203
 Reduced chi-squared =      1.067917     for     56 degrees of freedom
 Null hypothesis probability = 0.339
 
Photon flux (15-150 keV)    in 183.1 sec: 4.747265E-02 ( -0.00883979  0.00886343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.79284e-07 ( -9.26211e-08  1.15988e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  183.080 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.41327   ( -8.58673   2.17652 )
beta        : -8.31032    ( -1.68968   18.3103 )
Epeak [keV] : 15.3156      ( -15.2156 10.2504 )
Norm@50keV   : 1.499536E-03    ( -3.469485E-02   115.977 )
------------------------------------------------------------
 Chi-Squared =      60.19827     using    59 PHA bins.
 Reduced chi-squared =      1.094514     for     55 degrees of freedom
 Null hypothesis probability = 0.293
 
Photon flux (15-150 keV)    in 183.1 sec: 4.780394E-02 ( -0.00887364  0.00886262 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78116e-07 ( -1.00877e-07  9.18393e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to  183.080 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.79950     ( -0.425058   0.503118 )
Norm@50keV  : 2.022694E-04    ( -7.319433E-05   7.677829E-05) )
------------------------------------------------------------
 Chi-Squared =      60.31429     using    59 PHA bins.
 Reduced chi-squared =      1.058145     for     57 degrees of freedom
 Null hypothesis probability = 0.357
 
Photon flux (15-150 keV)    in 183.1 sec: 4.827547E-02 ( -0.00883181  0.00883646 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.0873e-07 ( -9.30862e-08  1.00361e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  183.080 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58881     (     )
Epeak [keV] : 10.5947      ( -6.26130 18.8306 )
Norm@50keV  : 1.347980E-03    ( -9.782272E-04   0.415052 )
------------------------------------------------------------
 Chi-Squared =      59.80338     using    59 PHA bins.
 but latest trial   25.1257     gives Chi-Squared =   2.75698
 Reduced chi-squared =      1.067917     for     56 degrees of freedom
 Null hypothesis probability = 0.339
 
Photon flux (15-150 keV)    in 183.1 sec: 4.747265E-02 ( -0.00883979  0.00886343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.79284e-07 ( -9.26211e-08  1.15988e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  183.080 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.41327   ( -8.58673   2.17652 )
beta        : -8.31032    ( -1.68968   18.3103 )
Epeak [keV] : 15.3156      ( -15.2156 10.2504 )
Norm@50keV   : 1.499536E-03    ( -3.469485E-02   115.977 )
------------------------------------------------------------
 Chi-Squared =      60.19827     using    59 PHA bins.
 Reduced chi-squared =      1.094514     for     55 degrees of freedom
 Null hypothesis probability = 0.293
 
Photon flux (15-150 keV)    in 183.1 sec: 4.780394E-02 ( -0.00887364  0.00886262 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.78116e-07 ( -1.00877e-07  9.18393e-08 ) ergs/cm2
 
Plot creation:
Sun Mar 16 07:29:21 EDT 2008