batgrbproduct Analysis for Trigger=340973

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Sat Jan 24 10:05:43 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger340973/GCN5_download_cron
======================================================================

  Trigger: 00340973      Segment: 000

  BAT Trigger Time: 254451984   [s; MET]
      Trigger Stop: 254452048   [s; MET]
               UTC: 2009-01-24T01:06:19.559120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.291582453064   Dec: -61.9049982688932  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.23
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.23

  Flight Position:   [ source = BAT ]
    RA: 170.291582453064   Dec: -61.9049982688932  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.210589365271   Dec: -61.888985758676  [deg; J2000]  
        { 11h 20m 50.5s , -61d 53' 20.3" }
         +/- 2.78431066915748 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.54545045151978 [arcmin] (formal 1-sigma fit error)
    SNR: 7.04380609552532
 
  Angular difference between Flight and Ground position is 2.482587 arcmin
 
  Partial Coding Fraction: 0.703125    [ including projection effects ]

  Duration
     T90: 152.247999995947 +/- 62.1529886606234
        Measured from: -35.4679999053478
                   to: 116.780000090599     [s; relative to TRIGTIME]
     T50: 73.4359999895096 +/- 69.3601450949199
        Measured from: -8.83599990606308
                   to: 64.6000000834465     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -35.5879999995232     
                   to: -34.5879999995232     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -40.4959999918938     
                   to: 117.772000014782     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.654376   0.579193  -0.006366   0.079058
           0.085362   0.082468   0.073875   0.071025 [error]
 Peak      0.015792   0.017533   0.015285   0.014468
           0.009541   0.009729   0.008194   0.007937 [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 2.17e-07 1.95e-07 1.20e-07 1.13e-07 5.80e-07 6.45e-07   erg/cm2
              Error 4.07e-08 4.19e-08 5.07e-08 8.68e-08 1.28e-07 1.76e-07   erg/cm2
Peak flux Power-law 9.83e-02 1.21e-01 1.09e-01 1.68e-01 3.86e-01 4.96e-01   ph/cm2/s
              Error 1.19e-01 1.02e-01 8.78e-02 3.56e-01 3.07e-01 3.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.12e-07 2.48e-07 2.73e-08 5.94e-11 4.87e-07 4.87e-07   erg/cm2
              Error 4.58e-08 5.89e-08 3.38e-08 1.95e-09 8.99e-08 8.99e-08   erg/cm2
Peak flux Cutoff-PL 9.81e-02 1.21e-01 1.09e-01 1.67e-01 3.86e-01 4.95e-01   ph/cm2/s
              Error 1.19e-01 1.02e-01 8.79e-02 3.55e-01 3.07e-01 3.40e-01   ph/cm2/s
 
Fluence        Band 2.22e-07 2.39e-07 2.27e-08 2.56e-10 4.81e-07 5.26e-07   erg/cm2
              Error 4.63e-08 5.82e-08 1.32e-08 3.36e-09 9.05e-08 0.00e+00   erg/cm2
Peak flux      Band 1.23e-01 1.23e-01 1.09e-01 1.64e-01 3.90e-01 4.71e-01   ph/cm2/s
              Error 0.00e+00 1.03e-01 8.80e-02 3.43e-01 3.09e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.694    0.376    -      -           3.43e-04 1.10e-04   54.079 57
CPL  -1.499    1.888      24.9    4.4      2.83e-01 0.00e+00   44.233  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.159    1.445    -      -           3.31e-03 1.99e-03   55.525 57
CPL   1.155    1.457    9999.2    0.0      3.32e-03 5.46e-02   55.528 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  158.268  -40.496  117.772
T90   152.248  -35.468  116.780
T50    73.436   -8.836   64.600
Peak    1.000  -35.588  -34.588

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  170.2106 -61.8890 0.0272   25.9  -53.1       1.0047     7.0  TRIG_00340973       
------------------------------------------
 
Foreground time interval of the image:
 -7.899 117.772 (delta_t = 125.671 [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  -40.496 sec. to  117.772 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.69394     ( -0.345959   0.405745 )
Norm@50keV  : 3.432396E-04    ( -1.059206E-04   1.137280E-04) )
------------------------------------------------------------
 Chi-Squared =      54.07948     using    59 PHA bins.
 Reduced chi-squared =     0.9487627     for     57 degrees of freedom
 Null hypothesis probability = 0.585
 
Photon flux (15-150 keV)    in 158.3 sec: 7.673569E-02 ( -0.0130513  0.013081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.79513e-07 ( -1.23578e-07  1.3317e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -40.496 sec. to  117.772 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.49884     ( -1.50116   2.27565 )
Epeak [keV] : 24.9288      ( -4.42144 4.32369 )
Norm@50keV  : 0.282855    (     )
------------------------------------------------------------
 Chi-Squared =      44.23295     using    59 PHA bins.
 but latest trial   20.4895     gives Chi-Squared =   4.13774
 Reduced chi-squared =     0.7898741     for     56 degrees of freedom
 Null hypothesis probability = 0.872
 
Photon flux (15-150 keV)    in 158.3 sec: 7.440045E-02 ( -0.0121751  0.0124428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.86989e-07 ( -8.57622e-08  9.40492e-08 ) ergs/cm2
 
Band function
Time interval is from  -40.496 sec. to  117.772 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34326   ( -1.74851   1.67733 )
beta        : -5.51048    ( -4.48952   15.5103 )
Epeak [keV] : 15.3613      ( -15.2613 5.35520 )
Norm@50keV   : 2.914798E-03    ( -0.331013   45.5868 )
------------------------------------------------------------
 Chi-Squared =      48.47948     using    59 PHA bins.
 Reduced chi-squared =     0.8814451     for     55 degrees of freedom
 Null hypothesis probability = 0.720
 
Photon flux (15-150 keV)    in 158.3 sec: 7.310624E-02 ( -0.0117065  0.0117082 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81286e-07 ( -8.07045e-08  1.00378e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  -35.588 sec. to  -34.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15874     ( -1.63528   1.25467 )
Norm@50keV  : 3.307760E-03    ( -2.140655E-03   1.837824E-03) )
------------------------------------------------------------
 Chi-Squared =      55.52526     using    59 PHA bins.
 Reduced chi-squared =     0.9741273     for     57 degrees of freedom
 Null hypothesis probability = 0.531
 
Photon flux (15-150 keV)    in 1.000 sec: 0.386145 ( -0.386145  0.228854 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39335e-08 ( -3.39335e-08  2.12042e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -35.588 sec. to  -34.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15465     ( -1.65215   1.26127 )
Epeak [keV] : 9999.25      (   )
Norm@50keV  : 3.324097E-03    ( -1.114247E-03   0.107986 )
------------------------------------------------------------
 Chi-Squared =      55.52780     using    59 PHA bins.
 Reduced chi-squared =     0.9915679     for     56 degrees of freedom
 Null hypothesis probability = 0.493
 
Photon flux (15-150 keV)    in 1.000 sec: 0.385959 ( -0.385959  0.228785 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39603e-08 ( -3.39603e-08  2.11926e-08 ) ergs/cm2
 
Band function
Time interval is from  -35.588 sec. to  -34.588 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.872358   ( -9.12764   5.87236 )
beta        : -1.17508    ( -8.82492   1.65069 )
Epeak [keV] : 78.7061      ( -78.6061 9921.29 )
Norm@50keV   : 5.818483E-03    ( -32.9583   824.844 )
------------------------------------------------------------
 Chi-Squared =      55.52106     using    59 PHA bins.
 Reduced chi-squared =      1.009474     for     55 degrees of freedom
 Null hypothesis probability = 0.455
 
Photon flux (15-150 keV)    in 1.000 sec: 0.390103 ( -0.390103  0.228852 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05496e-07 ( -1.05496e-07  6.72949e-06 ) ergs/cm2
 
Plot creation:
Sat Jan 24 10:35:40 EST 2009