batgrbproduct Analysis for Trigger=341452

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Thu Jan 29 13:44:34 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger341452/GCN5_download_cron
======================================================================

  Trigger: 00341452      Segment: 000

  BAT Trigger Time: 254903592   [s; MET]
      Trigger Stop: 254903912   [s; MET]
               UTC: 2009-01-29T06:33:07.545200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 252.047839106946   Dec: -45.2356927497954  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    10.68
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.68

  Flight Position:   [ source = BAT ]
    RA: 252.047839106946   Dec: -45.2356927497954  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.960458862193   Dec: -45.2368075079326  [deg; J2000]  
        { 16h 47m 50.5s , -45d 14' 12.5" }
         +/- 2.94453427425307 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.83896367857053 [arcmin] (formal 1-sigma fit error)
    SNR: 6.5027138871473
 
  Angular difference between Flight and Ground position is 3.692518 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 325.295999974012 +/- 54.3540605981251
        Measured from: -17.9439999163151
                   to: 307.352000057697     [s; relative to TRIGTIME]
     T50: 170.063999980688 +/- 75.8388004171411
        Measured from: 53.4000000953674
                   to: 223.464000076056     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 198.555999994278     
                   to: 199.555999994278     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -40.7439999878407     
                   to: 332.296000003815     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.295195   1.119996   0.342535   0.016604
           0.108210   0.098832   0.083981   0.071922 [error]
 Peak      0.006669   0.015025   0.011008   0.007378
           0.005667   0.005267   0.004281   0.003689 [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 3.66e-07 4.09e-07 3.27e-07 4.34e-07 1.26e-06 1.53e-06   erg/cm2
              Error 5.25e-08 4.64e-08 7.34e-08 1.87e-07 1.66e-07 2.80e-07   erg/cm2
Peak flux Power-law 5.36e-02 6.88e-02 6.45e-02 1.07e-01 2.23e-01 2.93e-01   ph/cm2/s
              Error 5.95e-02 5.55e-02 4.88e-02 1.62e-01 1.14e-01 1.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.44e-07 4.51e-07 2.81e-07 7.99e-08 1.14e-06 1.16e-06   erg/cm2
              Error 5.99e-08 8.24e-08 9.81e-08 2.56e-07 1.94e-07 3.44e-07   erg/cm2
Peak flux Cutoff-PL 5.32e-02 6.87e-02 6.45e-02 1.06e-01 2.23e-01 2.81e-01   ph/cm2/s
              Error 5.95e-02 4.39e-02 4.88e-02 1.61e-01 1.14e-01 2.29e-01   ph/cm2/s
 
Fluence        Band 3.42e-07 4.47e-07 2.84e-07 1.83e-07 1.17e-06 1.26e-06   erg/cm2
              Error 5.69e-08 6.18e-08 8.49e-08 2.50e-07 1.62e-07 3.93e-07   erg/cm2
Peak flux      Band 4.70e-02 7.49e-02 6.55e-02 9.09e-02 2.15e-01 3.00e-01   ph/cm2/s
              Error 4.42e-02 5.62e-02 3.75e-02 1.16e-01 1.77e-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    2.323    0.231    -      -           3.52e-04 5.70e-05   50.755 57
CPL   1.458    1.076      23.3   16.9      1.20e-03 6.05e-03   48.538 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.093    1.043    -      -           1.92e-03 9.74e-04   59.932 57
CPL   0.744    3.254     185.6    0.0      2.81e-03 1.44e-03   59.974 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  373.040  -40.744  332.296
T90   325.296  -17.944  307.352
T50   170.064   53.400  223.464
Peak    1.000  198.556  199.556

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  251.9605 -45.2368 0.0297   12.9 -133.4       1.8802     6.5  TRIG_00341452       
------------------------------------------
 
Foreground time interval of the image:
-40.744 332.296 (delta_t = 373.040 [sec])
Background time interval of the image:
-239.000 -40.744 (delta_t = 198.256 [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  -40.744 sec. to  332.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.32306     ( -0.221743   0.239277 )
Norm@50keV  : 3.524881E-04    ( -5.747739E-05   5.650712E-05) )
------------------------------------------------------------
 Chi-Squared =      50.75511     using    59 PHA bins.
 Reduced chi-squared =     0.8904406     for     57 degrees of freedom
 Null hypothesis probability = 0.707
 
Photon flux (15-150 keV)    in 373.0 sec: 6.240034E-02 ( -0.00663777  0.00663926 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2619e-06 ( -1.63124e-07  1.68585e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -40.744 sec. to  332.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45826     ( -1.61196   0.539546 )
Epeak [keV] : 23.3032      ( -23.2932 10.5223 )
Norm@50keV  : 1.201176E-03    ( -1.201176E-03   1.089936E-02) )
------------------------------------------------------------
 Chi-Squared =      48.53837     using    59 PHA bins.
 Reduced chi-squared =     0.8667566     for     56 degrees of freedom
 Null hypothesis probability = 0.750
 
Photon flux (15-150 keV)    in 373.0 sec: 5.990309E-02 ( -0.00710491  0.00716923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13744e-06 ( -1.75791e-07  2.11912e-07 ) ergs/cm2
 
Band function
Time interval is from  -40.744 sec. to  332.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.32681   ( -8.67319   2.30473 )
beta        : -9.01495    ( -6.77448   0.935138 )
Epeak [keV] : 25.7197      ( -25.1438 18.4480 )
Norm@50keV   : 1.416254E-03    ( -1.446051E-03   4.219579E-02) )
------------------------------------------------------------
 Chi-Squared =      48.52389     using    59 PHA bins.
 Reduced chi-squared =     0.8822526     for     55 degrees of freedom
 Null hypothesis probability = 0.719
 
Photon flux (15-150 keV)    in 373.0 sec: 6.023980E-02 ( -0.00700252  0.00689086 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16525e-06 ( -1.33168e-07  1.90569e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  198.552 sec. to  199.560 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09303     ( -1.17291   0.914038 )
Norm@50keV  : 1.921744E-03    ( -1.012126E-03   9.361712E-04) )
------------------------------------------------------------
 Chi-Squared =      59.93152     using    59 PHA bins.
 Reduced chi-squared =      1.051430     for     57 degrees of freedom
 Null hypothesis probability = 0.370
 
Photon flux (15-150 keV)    in 1.008 sec: 0.222749 ( -0.11266  0.115857 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03026e-08 ( -2.03026e-08  1.05187e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  198.552 sec. to  199.560 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.743622     ( -3.74362   2.76527 )
Epeak [keV] : 185.596      (   )
Norm@50keV  : 2.810387E-03    ( -1.966965E-03   9.071913E-04) )
------------------------------------------------------------
 Chi-Squared =      59.97405     using    59 PHA bins.
 Reduced chi-squared =      1.070965     for     56 degrees of freedom
 Null hypothesis probability = 0.334
 
Photon flux (15-150 keV)    in 1.008 sec: 0.222690 ( -0.112629  0.115806 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00989e-08 ( -1.26624e-08  1.07388e-08 ) ergs/cm2
 
Band function
Time interval is from  198.552 sec. to  199.560 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.550772   ( -9.44923   5.55077 )
beta        : -1.25970    ( -8.74030   1.31929 )
Epeak [keV] : 128.644      ( -128.544 9871.36 )
Norm@50keV   : 3.596504E-03    ( -1.81001   5.92011 )
------------------------------------------------------------
 Chi-Squared =      59.86786     using    59 PHA bins.
 Reduced chi-squared =      1.088507     for     55 degrees of freedom
 Null hypothesis probability = 0.304
 
Photon flux (15-150 keV)    in 1.008 sec: 0.214926 ( -0.114128  0.118674 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95241e-08 ( -9.30061e-09  5.4175e-09 ) ergs/cm2
 
Plot creation:
Thu Jan 29 14:03:27 EST 2009