batgrbproduct Analysis for Trigger=146426

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Jan  7 16:39:41 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger146426/GCN5_download_cron
======================================================================

  Trigger: 00146426      Segment: 000

  BAT Trigger Time: 143322121.536   [s; MET]
      Trigger Stop: 143322121.984   [s; MET]
               UTC: 2005-07-17T19:42:01.909120    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms

  BAT 
    RA: 198.544093216425   Dec: -26.465485961692  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    33388
     Image Trigger?:     NO
     Rate S/N Ratio:     8.66025403784439  [ if not an image trigger ]
     Image S/N Ratio:    33388

  Flight Position:   [ source = BAT ]
    RA: 198.544093216425   Dec: -26.465485961692  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 198.457783658012   Dec: -26.4327393283044  [deg; J2000]  
        { 13h 13m 49.9s , -26d 25' 57.9" }
         +/- 7.77443406191335 [arcmin] (estimated 90% radius based on SNR)
         +/- 5.4019589342591 [arcmin] (formal 1-sigma fit error)
    SNR: 1.62455493639363
    RA  =  13h 13m 49.9s  (198.457784 deg.)
    Dec = -26d 25' 58" (-26.432739 deg.)
 
  Angular difference between Flight and Ground position is 5.035660 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 0.448000013828278 +/- 
        Measured from: 0
                   to: 0.448000013828278     [s; relative to TRIGTIME]
     T50: 0.448000013828278 +/- 
        Measured from: 0
                   to: 0.448000013828278     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.448000013828278 second)
        Measured from: 0     
                   to: 0.448000013828278     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.448000013828278     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.005134  -0.001442   0.006134   0.004918
           0.003737   0.003649   0.003232   0.002969 [error]
 Peak     -0.005134  -0.001442   0.006134   0.004918
           0.003737   0.003649   0.003232   0.002969 [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 5.83e-11 3.64e-10 1.96e-09 4.83e-08 6.43e-09 7.38e-08   erg/cm2
              Error 4.05e-10 9.13e-10 2.38e-09 1.02e-07 7.14e-09 1.03e-07   erg/cm2
Peak flux Power-law 3.99e-03 1.32e-02 3.58e-02 2.87e-01 9.79e-02 3.42e-01   ph/cm2/s
              Error 2.91e-02 3.52e-02 4.50e-02 5.36e-01 1.27e-01 5.64e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.31e-11 4.36e-10 2.90e-09 9.29e-09 7.27e-09 1.21e-08   erg/cm2
              Error 3.12e-10 8.65e-10 3.31e-09 1.52e-07 7.67e-09 1.53e-07   erg/cm2
Peak flux Cutoff-PL 2.74e-03 1.31e-02 5.16e-02 8.87e-02 1.13e-01 3.39e-01   ph/cm2/s
              Error 3.33e-02 6.18e-02 7.80e-01 1.25e-01 8.75e-01 0.00e+00   ph/cm2/s
 
Fluence        Band 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      Band 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
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.439    6.500    -      -           6.01e-04 1.09e-03   58.307 57
CPL  -0.433    6.500    9994.3    0.0      6.24e-04 0.00e+00   58.303 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.439    6.500    -      -           6.01e-04 1.09e-03   58.307 57
CPL  -0.433    6.500    9994.3    0.0      6.24e-04 0.00e+00   58.303 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    0.448    0.000    0.448
T90     0.448    0.000    0.448
T50     0.448    0.000    0.448
Peak    0.448    0.000    0.448

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  198.4578 -26.4327 0.1181   27.0  -41.0       0.0113     1.6  TRIG_00146426       
------------------------------------------
 
Foreground time interval of the image:
 -0.064   0.384 (delta_t =   0.448 [sec])
Background time interval of the image:
-60.600  -1.600 (delta_t =  59.000 [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   -0.064 sec. to    0.384 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.438957     ( -2.56104   10.4390 )
Norm@50keV  : 6.010425E-04    ( -6.010425E-04   1.569533E-03) )
------------------------------------------------------------
 Chi-Squared =      58.30736     using    59 PHA bins.
 Reduced chi-squared =      1.022936     for     57 degrees of freedom
 Null hypothesis probability = 0.427
 
Photon flux (15-150 keV)    in 0.4480 sec: 9.786251E-02 ( -0.0978625  0.156072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.43292e-09 ( -6.43292e-09  7.84045e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.064 sec. to    0.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.432545     ( -2.56745   10.4325 )
Epeak [keV] : 9994.27      (   )
Norm@50keV  : 6.242510E-04    (     )
------------------------------------------------------------
 Chi-Squared =      58.30283     using    59 PHA bins.
 Reduced chi-squared =      1.041122     for     56 degrees of freedom
 Null hypothesis probability = 0.391
 
Photon flux (15-150 keV)    in 0.4480 sec: 0.113302 ( -0.113302  0.136979 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27225e-09 ( -7.27225e-09  8.07032e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.064 sec. to    0.384 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.773215   ( -15.0000   2.956390E-05) )
beta        : 0.437419    ( -6.21384   13.7862 )
Epeak [keV] : 46.4981      ( -96.8404 9903.06 )
Norm@50keV   : 6.876218E-04    ( -3.265732E-02   6590.11 )
------------------------------------------------------------
 Chi-Squared =      58.30738     using    59 PHA bins.
 Reduced chi-squared =      1.060134     for     55 degrees of freedom
 Null hypothesis probability = 0.355
 
Photon flux (15-150 keV)    in 0.4480 sec:  (    ) 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   -0.064 sec. to    0.384 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.438957     ( -2.56104   10.4390 )
Norm@50keV  : 6.010425E-04    ( -6.010425E-04   1.569533E-03) )
------------------------------------------------------------
 Chi-Squared =      58.30736     using    59 PHA bins.
 Reduced chi-squared =      1.022936     for     57 degrees of freedom
 Null hypothesis probability = 0.427
 
Photon flux (15-150 keV)    in 0.4480 sec: 9.786251E-02 ( -0.0978625  0.156072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.43292e-09 ( -6.43292e-09  7.84045e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.064 sec. to    0.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.432545     ( -2.56745   10.4325 )
Epeak [keV] : 9994.27      (   )
Norm@50keV  : 6.242510E-04    (     )
------------------------------------------------------------
 Chi-Squared =      58.30283     using    59 PHA bins.
 Reduced chi-squared =      1.041122     for     56 degrees of freedom
 Null hypothesis probability = 0.391
 
Photon flux (15-150 keV)    in 0.4480 sec: 0.113302 ( -0.113302  0.136979 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27225e-09 ( -7.27225e-09  8.07032e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.064 sec. to    0.384 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.773215   ( -15.0000   2.956390E-05) )
beta        : 0.437419    ( -6.21384   13.7862 )
Epeak [keV] : 46.4981      ( -96.8404 9903.06 )
Norm@50keV   : 6.876218E-04    ( -3.265732E-02   6590.11 )
------------------------------------------------------------
 Chi-Squared =      58.30738     using    59 PHA bins.
 Reduced chi-squared =      1.060134     for     55 degrees of freedom
 Null hypothesis probability = 0.355
 
Photon flux (15-150 keV)    in 0.4480 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Jan  7 16:47:09 EST 2008