batgrbproduct Analysis for Trigger=339696

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Mon Jan 12 10:46:03 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger339696/GCN5_download_cron
======================================================================

  Trigger: 00339696      Segment: 000

  BAT Trigger Time: 253411106.112   [s; MET]
      Trigger Stop: 253411107.136   [s; MET]
               UTC: 2009-01-11T23:58:21.703320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.645117762436   Dec: 0.0910882533427581  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.11
     Image Trigger?:     NO
     Rate S/N Ratio:     10.2469507659596  [ if not an image trigger ]
     Image S/N Ratio:    7.11

  Flight Position:   [ source = BAT ]
    RA: 251.645117762436   Dec: 0.0910882533427581  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.656572607988   Dec: 0.0635503769624121  [deg; J2000]  
        { 16h 46m 37.6s , +00d 03' 48.8" }
         +/- 1.50323259723209 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.533004693495734 [arcmin] (formal 1-sigma fit error)
    SNR: 16.991191330688
 
  Angular difference between Flight and Ground position is 1.789517 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 24.9160000085831 +/- 2.6171679208201
        Measured from: -1.6839998960495
                   to: 23.2320001125336     [s; relative to TRIGTIME]
     T50: 13.527999997139 +/- 1.36540836823541
        Measured from: 1.91600009799004
                   to: 15.444000095129     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 10.7040000259876     
                   to: 11.7040000259876     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.87999999523163     
                   to: 25.5840000212193     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.536295   0.474858   0.174693   0.043766
           0.032798   0.030550   0.026804   0.024843 [error]
 Peak      0.033338   0.038862   0.022473   0.011306
           0.006657   0.006138   0.005337   0.004823 [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 1.78e-07 1.96e-07 1.54e-07 1.99e-07 6.02e-07 7.24e-07   erg/cm2
              Error 1.92e-08 1.59e-08 2.48e-08 6.21e-08 5.56e-08 9.23e-08   erg/cm2
Peak flux Power-law 3.50e-01 2.89e-01 1.62e-01 1.34e-01 8.59e-01 9.34e-01   ph/cm2/s
              Error 9.79e-02 5.19e-02 4.57e-02 7.56e-02 1.55e-01 1.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.71e-07 2.08e-07 1.42e-07 6.66e-08 5.63e-07 5.84e-07   erg/cm2
              Error 2.13e-08 2.12e-08 3.15e-08 1.46e-07 6.88e-08 1.33e-07   erg/cm2
Peak flux Cutoff-PL 3.49e-01 2.89e-01 1.62e-01 1.33e-01 8.59e-01 9.33e-01   ph/cm2/s
              Error 9.79e-02 5.19e-02 4.58e-02 7.51e-02 1.55e-01 1.69e-01   ph/cm2/s
 
Fluence        Band 1.86e-07 2.05e-07 1.62e-07 2.09e-07 6.32e-07 6.71e-07   erg/cm2
              Error 1.79e-07 2.50e-07 2.52e-07 5.61e-07 3.09e-07 0.00e+00   erg/cm2
Peak flux      Band 3.49e-01 2.89e-01 1.62e-01 1.33e-01 8.59e-01 9.33e-01   ph/cm2/s
              Error 9.79e-02 5.19e-02 3.46e-02 8.00e-02 1.16e-01 1.70e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.350    0.169    -      -           2.38e-03 2.74e-04   52.958 57
CPL   1.885    0.786       9.3   15.1      4.59e-03 9.20e-03   51.061  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.835    0.348    -      -           6.15e-03 1.31e-03   52.877 57
CPL   1.735    0.000     118.2 5000.0      6.97e-03 1.49e-02   52.922  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   28.464   -2.880   25.584
T90    24.916   -1.684   23.232
T50    13.528    1.916   15.444
Peak    1.000   10.704   11.704

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  251.6566  +0.0636 0.0112   25.1 -140.0       0.9500    17.0  TRIG_00339696       
------------------------------------------
 
Foreground time interval of the image:
 -2.880  17.218 (delta_t =  20.098 [sec])
Background time interval of the image:
-239.112 -181.072 (delta_t =  58.040 [sec])
-180.112 -55.950 (delta_t = 124.162 [sec])
-55.112  -2.880 (delta_t =  52.232 [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
Multiple GTIs in the spectrum
tstart tstop
-2.880000 17.218000
17.888000 18.338000
19.888000 25.584000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.34980     ( -0.164537   0.173573 )
Norm@50keV  : 2.379160E-03    ( -2.757425E-04   2.720731E-04) )
------------------------------------------------------------
 Chi-Squared =      52.95837     using    59 PHA bins.
 Reduced chi-squared =     0.9290941     for     57 degrees of freedom
 Null hypothesis probability = 0.627
 
Photon flux (15-150 keV)    in 26.24 sec: 0.427613 ( -0.033155  0.03318 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.02337e-07 ( -5.49229e-08  5.62454e-08 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-2.880000 17.218000
17.888000 18.338000
19.888000 25.584000
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88534     ( -0.989905   0.581659 )
Epeak [keV] : 9.26378      ( -8.81712 21.3092 )
Norm@50keV  : 4.585962E-03    ( -4.585962E-03   1.380641E-02) )
------------------------------------------------------------
 Chi-Squared =      51.06142     using    59 PHA bins.
 but latest trial -0.204669     gives Chi-Squared =   204.828
 Reduced chi-squared =     0.9118110     for     56 degrees of freedom
 Null hypothesis probability = 0.662
 
Photon flux (15-150 keV)    in 26.24 sec: 0.415689 ( -0.0358  0.03591 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.63352e-07 ( -6.56131e-08  7.19055e-08 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-2.880000 17.218000
17.888000 18.338000
19.888000 25.584000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.59867   ( -8.40133   5.98374 )
beta        : -9.29568    ( -7.14542   0.583481 )
Epeak [keV] : 20.0060      ( -18.6983 11.7769 )
Norm@50keV   : 6.825867E-03    ( -3.020309E-03   409.183 )
------------------------------------------------------------
 Chi-Squared =      51.11050     using    59 PHA bins.
 Reduced chi-squared =     0.9292818     for     55 degrees of freedom
 Null hypothesis probability = 0.624
 
Photon flux (15-150 keV)    in 26.24 sec: 0.416160 ( -0.036083  0.035907 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.32497e-07 ( -5.98902e-08  1.06235e-06 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   10.704 sec. to   11.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.83531     ( -0.336007   0.360093 )
Norm@50keV  : 6.149300E-03    ( -1.336245E-03   1.280108E-03) )
------------------------------------------------------------
 Chi-Squared =      52.87721     using    59 PHA bins.
 Reduced chi-squared =     0.9276704     for     57 degrees of freedom
 Null hypothesis probability = 0.630
 
Photon flux (15-150 keV)    in 1.000 sec: 0.859238 ( -0.154927  0.155112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.65908e-08 ( -1.20156e-08  1.2324e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   10.704 sec. to   11.704 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73458     (     )
Epeak [keV] : 118.207      ( -60.7080 9939.28 )
Norm@50keV  : 6.968790E-03    ( -1.596809E-03   2.826476E-02) )
------------------------------------------------------------
 Chi-Squared =      52.92163     using    59 PHA bins.
 but latest trial  2.633336E-03 gives Chi-Squared =   12.0411
 Reduced chi-squared =     0.9450291     for     56 degrees of freedom
 Null hypothesis probability = 0.592
 
Photon flux (15-150 keV)    in 1.000 sec: 0.858927 ( -0.154871  0.155053 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.65387e-08 ( -1.19631e-08  1.23767e-08 ) ergs/cm2
 
Band function
Time interval is from   10.704 sec. to   11.704 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48675   ( -8.51325   6.48675 )
beta        : -1.83536    ( -8.16464   0.336479 )
Epeak [keV] : 22.8101      ( -22.7101 9977.19 )
Norm@50keV   : 1.311030E-02    ( -1.311030E-02   8.60845 )
------------------------------------------------------------
 Chi-Squared =      52.87740     using    59 PHA bins.
 Reduced chi-squared =     0.9614072     for     55 degrees of freedom
 Null hypothesis probability = 0.556
 
Photon flux (15-150 keV)    in 1.000 sec: 0.858927 ( -0.154871  0.077503 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.68094e-08 ( -1.03287e-08  1.01609e-08 ) ergs/cm2
 
Plot creation:
Mon Jan 12 11:14:27 EST 2009