batgrbproduct Analysis for Trigger=374598

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Nov  3 02:54:42 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger374598/GCN5_download_cron
======================================================================

  Trigger: 00374598      Segment: 000

  BAT Trigger Time: 278865283.584   [s; MET]
      Trigger Stop: 278865284.608   [s; MET]
               UTC: 2009-11-02T14:34:38.358760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 72.6742345146145   Dec: -72.5096722528519  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.01
     Image Trigger?:     NO
     Rate S/N Ratio:     29.8496231131986  [ if not an image trigger ]
     Image S/N Ratio:    13.01

  Flight Position:   [ source = BAT ]
    RA: 72.6742345146145   Dec: -72.5096722528519  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 72.6220250532324   Dec: -72.527242146902  [deg; J2000]  
        { 04h 50m 29.3s , -72d 31' 38.1" }
         +/- 1.18817783797711 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.444313842100737 [arcmin] (formal 1-sigma fit error)
    SNR: 23.7763334795224
 
  Angular difference between Flight and Ground position is 1.413096 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 6.64399999380112 +/- 0.456793168187455
        Measured from: -0.415999889373779
                   to: 6.22800010442734     [s; relative to TRIGTIME]
     T50: 3.38399994373322 +/- 0.8529126312612
        Measured from: 0.544000148773193
                   to: 3.92800009250641     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.255999982357025     
                   to: 0.744000017642975     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.779999971389771     
                   to: 6.63200002908707     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.146508   0.270376   0.238548   0.105254
           0.015271   0.017029   0.016113   0.014643 [error]
 Peak      0.040059   0.065752   0.062147   0.023180
           0.005827   0.006666   0.006543   0.005973 [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 4.29e-08 1.02e-07 1.94e-07 8.90e-07 5.24e-07 1.23e-06   erg/cm2
              Error 5.74e-09 8.07e-09 1.55e-08 1.63e-07 4.01e-08 1.72e-07   erg/cm2
Peak flux Power-law 3.33e-01 4.36e-01 4.20e-01 7.17e-01 1.43e+00 1.91e+00   ph/cm2/s
              Error 6.77e-02 5.41e-02 5.24e-02 1.92e-01 1.53e-01 2.35e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.17e-08 1.04e-07 1.96e-07 6.99e-07 5.19e-07 1.04e-06   erg/cm2
              Error 6.74e-09 9.21e-09 1.74e-08 2.99e-07 4.43e-08 3.48e-07   erg/cm2
Peak flux Cutoff-PL 3.12e-01 4.50e-01 4.33e-01 4.77e-01 1.41e+00 1.67e+00   ph/cm2/s
              Error 7.90e-02 4.73e-02 5.98e-02 2.85e-01 1.58e-01 3.72e-01   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    1.079    0.121    -      -           6.72e-03 4.55e-04   40.510 57
CPL   0.924    0.383     370.2    0.0      7.98e-03 3.70e-03   40.180 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.057    0.185    -      -           1.23e-02 1.32e-03   70.560 57
CPL   0.719    0.617     196.8    0.0      1.81e-02 1.65e-02   69.870 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: 6.656000 sec.
T50 in the 50-300 keV band: 4.480000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.412   -0.780    6.632
T90     6.644   -0.416    6.228
T50     3.384    0.544    3.928
Peak    1.000   -0.256    0.744

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   72.6220 -72.5272 0.0080   17.4  -81.4       0.7821    23.8  TRIG_00374598       
------------------------------------------
 
Foreground time interval of the image:
 -0.780   6.632 (delta_t =   7.412 [sec])
Background time interval of the image:
-239.584  -0.780 (delta_t = 238.804 [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   -0.780 sec. to    6.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07907     ( -0.121762   0.119918 )
Norm@50keV  : 6.72249E-03    ( -0.000454684   0.00045457 )
------------------------------------------------------------
# Chi-Squared =          40.51 using 59 PHA bins.
# Reduced chi-squared =         0.7107 for     57 degrees of freedom 
# Null hypothesis probability =   9.516612e-01
 
Photon flux (15-150 keV)    in 7.412 sec: 0.778261 ( -0.053659  0.053706 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.2449e-07 ( -3.99876e-08  4.02425e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.780 sec. to    6.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.923695     ( -0.507288   0.259291 )
Epeak [keV] : 370.235      ( -370.298 -370.298 )
Norm@50keV  : 7.98005E-03    ( -0.00164125   0.00576661 )
------------------------------------------------------------
# Chi-Squared =          40.18 using 59 PHA bins.
# Reduced chi-squared =         0.7176 for     56 degrees of freedom 
# Null hypothesis probability =   9.451384e-01
 
Photon flux (15-150 keV)    in 7.412 sec: 0.773026 ( -0.056637  0.054558 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.18569e-07 ( -4.47618e-08  4.38398e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.780 sec. to    6.632 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.76671E-02   ( 0.193524   0.193524 )
beta        : -1.22993    ( 1.22807   0.210239 )
Epeak [keV] : 70.2183      ( -69.9917 250.948 )
Norm@50keV   : 2.97740E-02    ( -0.0302391   77.0275 )
------------------------------------------------------------
# Chi-Squared =          38.09 using 59 PHA bins.
# Reduced chi-squared =         0.6925 for     55 degrees of freedom 
# Null hypothesis probability =   9.599972e-01
 
Photon flux (15-150 keV)    in 7.412 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   -0.256 sec. to    0.744 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05705     ( -0.18731   0.183431 )
Norm@50keV  : 1.23468E-02    ( -0.00131701   0.00131697 )
------------------------------------------------------------
# Chi-Squared =          70.56 using 59 PHA bins.
# Reduced chi-squared =          1.238 for     57 degrees of freedom 
# Null hypothesis probability =   1.070043e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.42678 ( -0.153231  0.153348 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30912e-07 ( -1.61058e-08  1.63149e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.256 sec. to    0.744 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.719349     ( -0.803315   0.430533 )
Epeak [keV] : 196.760      ( -196.848 -196.848 )
Norm@50keV  : 1.81157E-02    ( -0.00724578   0.0257416 )
------------------------------------------------------------
# Chi-Squared =          69.87 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     56 degrees of freedom 
# Null hypothesis probability =   1.007501e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.40763 ( -0.15875  0.15775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.27228e-07 ( -1.8333e-08  1.7831e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.256 sec. to    0.744 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.96126   ( -61.2884   -51.2888 )
beta        : -1.17535    ( -0.236432   0.212179 )
Epeak [keV] : 28.9824      ( -9.47904 7.26872 )
Norm@50keV   : 364.406    ( -83.7499   96.2358 )
------------------------------------------------------------
# Chi-Squared =          67.61 using 59 PHA bins.
# Reduced chi-squared =          1.229 for     55 degrees of freedom 
# Null hypothesis probability =   1.182320e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Tue Nov  3 03:21:34 EST 2009