batgrbproduct Analysis for Trigger=145767

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jan  7 15:29:26 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger145767/GCN5_download_cron
======================================================================

  Trigger: 00145767      Segment: 000

  BAT Trigger Time: 142957043.968   [s; MET]
      Trigger Stop: 142957070.848   [s; MET]
               UTC: 2005-07-13T14:17:24.348140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 57.4904149263481   Dec: -12.2645563356051  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    33371
     Image Trigger?:     NO
     Rate S/N Ratio:     9.16515138991168  [ if not an image trigger ]
     Image S/N Ratio:    33371

  Flight Position:   [ source = BAT ]
    RA: 57.4904149263481   Dec: -12.2645563356051  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 57.5479952421806   Dec: -12.295587481274  [deg; J2000]  
        { 03h 50m 11.5s , -12d 17' 44.1" }
         +/- 4.45249542556186 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.06607614023231 [arcmin] (formal 1-sigma fit error)
    SNR: 3.60198564096223
    RA  =   3h 50m 11.5s  (57.547995 deg.)
    Dec = -12d 17' 44" (-12.295587 deg.)
 
  Angular difference between Flight and Ground position is 3.855177 arcmin
 
  Partial Coding Fraction: 0.390625    [ including projection effects ]

  Duration
     T90: 26.8799999952316 +/- 
        Measured from: 0
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     T50: 26.8799999952316 +/- 
        Measured from: 0
                   to: 26.8799999952316     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 26.8799999952316 second)
        Measured from: 0     
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 26.8799999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.050116   0.055249   0.169992   0.131320
           0.053566   0.047196   0.047747   0.041245 [error]
 Peak      0.050116   0.055249   0.169992   0.131320
           0.053566   0.047196   0.047747   0.041245 [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 1.07e-08 3.45e-08 9.20e-08 7.21e-07 2.51e-07 8.59e-07   erg/cm2
              Error 1.40e-08 2.61e-08 4.17e-08 8.47e-07 1.13e-07 8.56e-07   erg/cm2
Peak flux Power-law 1.25e-02 2.18e-02 2.91e-02 7.97e-02 8.48e-02 1.43e-01   ph/cm2/s
              Error 1.67e-02 1.70e-02 2.12e-02 9.57e-02 4.46e-02 7.81e-02   ph/cm2/s
 
Fluence   Cutoff-PL 3.58e-09 3.41e-08 1.25e-07 1.10e-07 2.40e-07 2.69e-07   erg/cm2
              Error 1.14e-08 3.22e-08 5.87e-08 7.39e-07 1.13e-07 7.29e-07   erg/cm2
Peak flux Cutoff-PL 3.94e-03 2.02e-02 3.99e-02 1.95e-02 7.92e-02 8.36e-02   ph/cm2/s
              Error 1.42e-02 1.61e-02 1.90e-02 7.93e-02 3.86e-02 7.76e-02   ph/cm2/s
 
Fluence        Band 3.79e-09 3.48e-08 1.26e-07 2.38e-07 2.41e-07 3.09e-07   erg/cm2
              Error 5.78e-08 6.22e-07 1.04e-07 2.60e-07 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 2.69e-03 1.80e-02 4.03e-02 3.65e-02 7.74e-02 1.22e-01   ph/cm2/s
              Error 1.93e-02 1.95e-02 6.58e-02 3.41e-02 7.90e-02 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.582    0.980    -      -           7.25e-04 5.71e-04   51.336 57
CPL  -2.498    0.000      98.3   51.3      9.24e-03 3.15e-02   50.130  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.582    0.980    -      -           7.25e-04 5.71e-04   51.336 57
CPL  -2.498    0.000      98.3   51.3      9.24e-03 3.15e-02   50.130  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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   26.880    0.000   26.880
T90    26.880    0.000   26.880
T50    26.880    0.000   26.880
Peak   26.880    0.000   26.880

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   57.5480 -12.2956 0.0534   45.9  -14.1       0.5788     3.6  TRIG_00145767       
------------------------------------------
 
Foreground time interval of the image:
  0.000  26.880 (delta_t =  26.880 [sec])
Background time interval of the image:
-60.968 -45.612 (delta_t =  15.356 [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    0.000 sec. to   26.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.581695     ( -1.14299   0.817798 )
Norm@50keV  : 7.245898E-04    ( -7.245898E-04   4.178582E-04) )
------------------------------------------------------------
 Chi-Squared =      51.33551     using    59 PHA bins.
 Reduced chi-squared =     0.9006229     for     57 degrees of freedom
 Null hypothesis probability = 0.687
 
Photon flux (15-150 keV)    in 26.88 sec: 8.480771E-02 ( -0.042822  0.0464393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51308e-07 ( -1.13023e-07  1.1322e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   26.880 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49774     (     )
Epeak [keV] : 98.2919      ( -36.0707 66.4609 )
Norm@50keV  : 9.239781E-03    ( -1.446294E-02   4.863264E-02) )
------------------------------------------------------------
 Chi-Squared =      50.12965     using    59 PHA bins.
 but latest trial   37.3801     gives Chi-Squared =   11.4493
 Reduced chi-squared =     0.8951723     for     56 degrees of freedom
 Null hypothesis probability = 0.696
 
Photon flux (15-150 keV)    in 26.88 sec: 7.921130E-02 ( -0.0348551  0.0423917 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39518e-07 ( -1.08067e-07  1.18174e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.742532   ( -14.9999   7.104874E-05) )
beta        : -0.581390    ( -0.851550   1.13761 )
Epeak [keV] : 21.7247      ( -21.6247 9978.28 )
Norm@50keV   : 9.635034E-04    ( -20.2117   58016.2 )
------------------------------------------------------------
 Chi-Squared =      51.33551     using    59 PHA bins.
 Reduced chi-squared =     0.9333730     for     55 degrees of freedom
 Null hypothesis probability = 0.615
 
Photon flux (15-150 keV)    in 26.88 sec: 7.737595E-02 ( -0.033002  0.0351941 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41258e-07 ( -1.04274e-07  1.0414e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.581695     ( -1.14299   0.817798 )
Norm@50keV  : 7.245898E-04    ( -7.245898E-04   4.178582E-04) )
------------------------------------------------------------
 Chi-Squared =      51.33551     using    59 PHA bins.
 Reduced chi-squared =     0.9006229     for     57 degrees of freedom
 Null hypothesis probability = 0.687
 
Photon flux (15-150 keV)    in 26.88 sec: 8.480771E-02 ( -0.042822  0.0464393 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.51308e-07 ( -1.13023e-07  1.1322e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   26.880 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49774     (     )
Epeak [keV] : 98.2919      ( -36.0707 66.4609 )
Norm@50keV  : 9.239781E-03    ( -1.446294E-02   4.863264E-02) )
------------------------------------------------------------
 Chi-Squared =      50.12965     using    59 PHA bins.
 but latest trial   37.3801     gives Chi-Squared =   11.4493
 Reduced chi-squared =     0.8951723     for     56 degrees of freedom
 Null hypothesis probability = 0.696
 
Photon flux (15-150 keV)    in 26.88 sec: 7.921130E-02 ( -0.0348551  0.0423917 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39518e-07 ( -1.08067e-07  1.18174e-07 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   26.880 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.742532   ( -14.9999   7.104874E-05) )
beta        : -0.581390    ( -0.851550   1.13761 )
Epeak [keV] : 21.7247      ( -21.6247 9978.28 )
Norm@50keV   : 9.635034E-04    ( -20.2117   58016.2 )
------------------------------------------------------------
 Chi-Squared =      51.33551     using    59 PHA bins.
 Reduced chi-squared =     0.9333730     for     55 degrees of freedom
 Null hypothesis probability = 0.615
 
Photon flux (15-150 keV)    in 26.88 sec: 7.737595E-02 ( -0.033002  0.0351941 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41258e-07 ( -1.04274e-07  1.0414e-07 ) ergs/cm2
 
Plot creation:
Mon Jan  7 15:34:22 EST 2008