batgrbproduct Analysis for Trigger=303172

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Feb 14 02:39:27 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger303172/GCN5_download_cron
======================================================================

  Trigger: 00303172      Segment: 000

  BAT Trigger Time: 224605311.552   [s; MET]
      Trigger Stop: 224605312.576   [s; MET]
               UTC: 2008-02-13T14:21:48.980040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 273.681128352042   Dec: -24.2301125507352  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.61
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3440804327886  [ if not an image trigger ]
     Image S/N Ratio:    5.61

  Flight Position:   [ source = BAT ]
    RA: 273.681128352042   Dec: -24.2301125507352  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 273.634311259116   Dec: -24.2398357306229  [deg; J2000]  
        { 18h 14m 32.2s , -24d 14' 23.4" }
         +/- 3.18519915022521 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.01368576114209 [arcmin] (formal 1-sigma fit error)
    SNR: 5.81235084303264
    RA  =  18h 14m 32.2s  (273.634311 deg.)
    Dec = -24d 14' 23" (-24.239836 deg.)
 
  Angular difference between Flight and Ground position is 2.627061 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 1.02400001883507 +/- 
        Measured from: 0
                   to: 1.02400001883507     [s; relative to TRIGTIME]
     T50: 1.02400001883507 +/- 
        Measured from: 0
                   to: 1.02400001883507     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02400001883507 second)
        Measured from: 1.49011611938477e-08     
                   to: 1.02400003373623     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02400001883507     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.009152   0.006499   0.025142   0.017612
           0.006752   0.006350   0.005863   0.005572 [error]
 Peak      0.009152   0.006499   0.025142   0.017612
           0.006752   0.006350   0.005863   0.005572 [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 7.19e-10 3.56e-09 1.42e-08 2.13e-07 4.22e-08 2.54e-07   erg/cm2
              Error 1.22e-09 3.54e-09 9.82e-09 4.33e-07 1.46e-08 3.38e-07   erg/cm2
Peak flux Power-law 2.26e-02 5.70e-02 1.15e-01 5.83e-01 3.10e-01 7.78e-01   ph/cm2/s
              Error 3.78e-02 5.91e-02 8.07e-02 7.67e-01 2.26e-01 6.87e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.26e-10 3.44e-09 1.42e-08 2.14e-07 4.22e-08 2.15e-07   erg/cm2
              Error 1.23e-09 3.54e-09 9.83e-09 3.76e-07 1.46e-08 3.23e-07   erg/cm2
Peak flux Cutoff-PL 2.25e-02 5.69e-02 1.15e-01 5.81e-01 3.10e-01 7.75e-01   ph/cm2/s
              Error 3.77e-02 5.91e-02 8.07e-02 6.36e-01 1.37e-01 5.72e-01   ph/cm2/s
 
Fluence        Band 7.00e-10 3.50e-09 1.42e-08 2.14e-07 4.22e-08 1.64e-07   erg/cm2
              Error 1.21e-09 3.53e-09 9.82e-09 3.80e-07 1.46e-08 0.00e+00   erg/cm2
Peak flux      Band 2.25e-02 5.69e-02 1.15e-01 5.80e-01 3.10e-01 7.75e-01   ph/cm2/s
              Error 3.77e-02 5.91e-02 8.59e-02 1.40e+00 1.37e-01 5.72e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.013    1.928    -      -           2.29e-03 1.92e-03   72.468 57
CPL  -0.360    6.417     584.8    0.0      2.77e-03 1.93e-03   72.558 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.013    1.928    -      -           2.29e-03 1.92e-03   72.468 57
CPL  -0.360    6.429     584.8    0.0      2.77e-03 1.93e-03   72.558 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: 0.896000 sec.
T50 in the 50-300 keV band: 0.640000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  273.6343 -24.2398 0.0334   25.0   -4.3       0.0718     5.8  TRIG_00303172       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-52.451  -7.552 (delta_t =  44.899 [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    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.335627E-02     ( -2.98664   0.868460 )
Norm@50keV  : 2.288868E-03    ( -2.288868E-03   1.544731E-03) )
------------------------------------------------------------
 Chi-Squared =      72.46809     using    59 PHA bins.
 Reduced chi-squared =      1.271370     for     57 degrees of freedom
 Null hypothesis probability = 8.130E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310474 ( -0.310474  0.14128 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21685e-08 ( -1.46326e-08  1.46302e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.360185     ( -2.63982   10.1948 )
Epeak [keV] : 584.755      (   )
Norm@50keV  : 2.772547E-03    ( -2.338011E-03   1.529587E-03) )
------------------------------------------------------------
 Chi-Squared =      72.55823     using    59 PHA bins.
 Reduced chi-squared =      1.295683     for     56 degrees of freedom
 Null hypothesis probability = 6.757E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310404 ( -0.133692  0.141151 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22067e-08 ( -1.46456e-08  1.46437e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.374726   ( -9.62527   5.37473 )
beta        : 1.321267E-02    ( -0.868316   9.98679 )
Epeak [keV] : 22.5426      ( -22.4426 9977.46 )
Norm@50keV   : 3.260704E-03    ( -3.260704E-03   10355.7 )
------------------------------------------------------------
 Chi-Squared =      72.46809     using    59 PHA bins.
 Reduced chi-squared =      1.317602     for     55 degrees of freedom
 Null hypothesis probability = 5.727E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310411 ( -0.133642  0.141009 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21832e-08 ( -1.46412e-08  1.46464e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.335627E-02     ( -2.98664   0.868460 )
Norm@50keV  : 2.288868E-03    ( -2.288868E-03   1.544731E-03) )
------------------------------------------------------------
 Chi-Squared =      72.46809     using    59 PHA bins.
 Reduced chi-squared =      1.271370     for     57 degrees of freedom
 Null hypothesis probability = 8.130E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310474 ( -0.310474  0.14128 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21685e-08 ( -1.46326e-08  1.46302e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.360185     ( -2.63982   10.2182 )
Epeak [keV] : 584.755      (   )
Norm@50keV  : 2.772547E-03    ( -2.338011E-03   1.529587E-03) )
------------------------------------------------------------
 Chi-Squared =      72.55823     using    59 PHA bins.
 Reduced chi-squared =      1.295683     for     56 degrees of freedom
 Null hypothesis probability = 6.757E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310404 ( -0.133692  0.141151 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22067e-08 ( -1.46456e-08  1.46437e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.374726   ( -9.62527   5.37473 )
beta        : 1.321267E-02    ( -0.868316   9.98679 )
Epeak [keV] : 22.5426      ( -22.4426 9977.46 )
Norm@50keV   : 3.260704E-03    ( -3.260704E-03   10355.7 )
------------------------------------------------------------
 Chi-Squared =      72.46809     using    59 PHA bins.
 Reduced chi-squared =      1.317602     for     55 degrees of freedom
 Null hypothesis probability = 5.727E-02
 
Photon flux (15-150 keV)    in 1.024 sec: 0.310411 ( -0.133642  0.141009 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21832e-08 ( -1.46412e-08  1.46464e-08 ) ergs/cm2
 
Plot creation:
Thu Feb 14 02:56:44 EST 2008