batgrbproduct Analysis for Trigger=299787

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 28 06:33:28 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger299787/GCN5_download_cron
======================================================================

  Trigger: 00299787      Segment: 000

  BAT Trigger Time: 220479229.504   [s; MET]
      Trigger Stop: 220479230.528   [s; MET]
               UTC: 2007-12-27T20:13:47.043260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 58.1198112281124   Dec: -55.9526448765147  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.54
     Image Trigger?:     NO
     Rate S/N Ratio:     37.8549864614954  [ if not an image trigger ]
     Image S/N Ratio:    8.54

  Flight Position:   [ source = BAT ]
    RA: 58.1198112281124   Dec: -55.9526448765147  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 58.1152886576899   Dec: -55.9500952258176  [deg; J2000]  
        { 03h 52m 27.7s , -55d 57' 00.3" }
         +/- 2.68235352933588 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.26299161404285 [arcmin] (formal 1-sigma fit error)
    SNR: 7.4293811936703
    RA  =   3h 52m 27.7s  (58.115289 deg.)
    Dec = -55d 57'  0" (-55.950095 deg.)
 
  Angular difference between Flight and Ground position is 0.215605 arcmin
 
  Partial Coding Fraction: 0.4804688    [ including projection effects ]

  Duration
     T90: 303.148000001907 +/- 201.589700450749
        Measured from: 0.0719999969005585
                   to: 303.219999998808     [s; relative to TRIGTIME]
     T50: 94.2999999821186 +/- 236.806671166005
        Measured from: 1.26800000667572
                   to: 95.5679999887943     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0999999940395355     
                   to: 0.900000005960464     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.143999993801117     
                   to: 380.695999979973     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.487405   0.321316   0.243922   0.169297
           0.097032   0.097376   0.086070   0.074818 [error]
 Peak      0.048591   0.067791   0.070864   0.030059
           0.007832   0.009122   0.008718   0.007806 [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 1.21e-07 1.74e-07 1.86e-07 3.66e-07 5.95e-07 8.50e-07   erg/cm2
              Error 4.43e-08 4.52e-08 8.22e-08 3.38e-07 1.90e-07 4.25e-07   erg/cm2
Peak flux Power-law 3.88e-01 4.93e-01 4.58e-01 7.45e-01 1.59e+00 2.08e+00   ph/cm2/s
              Error 1.06e-01 7.97e-02 6.94e-02 2.54e-01 2.15e-01 3.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.20e-07 1.74e-07 1.86e-07 3.64e-07 5.95e-07 7.83e-07   erg/cm2
              Error 4.44e-08 4.53e-08 8.23e-08 3.35e-07 1.91e-07 4.76e-07   erg/cm2
Peak flux Cutoff-PL 3.87e-01 4.93e-01 4.58e-01 7.40e-01 1.59e+00 2.08e+00   ph/cm2/s
              Error 1.06e-01 7.98e-02 6.95e-02 2.52e-01 2.15e-01 3.01e-01   ph/cm2/s
 
Fluence        Band 1.24e-07 1.92e-07 1.62e-07 2.33e-07 5.63e-07 7.33e-07   erg/cm2
              Error 4.61e-08 5.33e-08 7.85e-08 2.14e-07 1.56e-07 3.40e-07   erg/cm2
Peak flux      Band 3.87e-01 4.93e-01 4.58e-01 7.40e-01 1.59e+00 2.08e+00   ph/cm2/s
              Error 1.06e-01 7.98e-02 6.95e-02 2.52e-01 2.15e-01 3.01e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.908    0.505    -      -           1.70e-04 5.55e-05   59.549 57
CPL   1.646    0.000      57.5    0.0      2.40e-04 1.67e-03   59.686 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.108    0.247    -      -           1.37e-02 1.80e-03   59.886 57
CPL   1.103    0.249    9999.3 5000.0      1.38e-02 1.81e-03   59.903 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: 1.600000 sec.
T50 in the 50-300 keV band: 0.768000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  380.840   -0.144  380.696
T90   303.148    0.072  303.220
T50    94.300    1.268   95.568
Peak    1.000   -0.100    0.900

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   58.1153 -55.9501 0.0258   28.5  -84.1       0.3796     7.4  TRIG_00299787       
------------------------------------------
 
Foreground time interval of the image:
 -0.144  14.097 (delta_t =  14.241 [sec])
Background time interval of the image:
-239.504  -0.144 (delta_t = 239.360 [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   -0.144 sec. to  380.696 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90826     ( -0.477723   0.531441 )
Norm@50keV  : 1.700001E-04    ( -5.722893E-05   5.381547E-05) )
------------------------------------------------------------
 Chi-Squared =      59.54927     using    59 PHA bins.
 Reduced chi-squared =      1.044724     for     57 degrees of freedom
 Null hypothesis probability = 0.383
 
Photon flux (15-150 keV)    in 380.8 sec: 2.448268E-02 ( -0.00630812  0.00630864 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.95088e-07 ( -1.85183e-07  1.95754e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.144 sec. to  380.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64645     (     )
Epeak [keV] : 57.4723      (   )
Norm@50keV  : 2.403594E-04    ( -7.036784E-05   3.261393E-03) )
------------------------------------------------------------
 Chi-Squared =      59.68576     using    59 PHA bins.
 Reduced chi-squared =      1.065817     for     56 degrees of freedom
 Null hypothesis probability = 0.343
 
Photon flux (15-150 keV)    in 380.8 sec: 2.447549E-02 ( -0.00630633  0.00630683 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.95221e-07 ( -1.85392e-07  1.95613e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.144 sec. to  380.696 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.63776   ( -12.1921   2.80788 )
beta        : -9.08112    ( -1.21010   0.628194 )
Epeak [keV] : 56.4730      ( -27.8806 610.081 )
Norm@50keV   : 2.434584E-04    ( -0.143945   33.1224 )
------------------------------------------------------------
 Chi-Squared =      59.69345     using    59 PHA bins.
 Reduced chi-squared =      1.085335     for     55 degrees of freedom
 Null hypothesis probability = 0.309
 
Photon flux (15-150 keV)    in 380.8 sec: 2.475353E-02 ( -0.00627423  0.00624369 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.63356e-07 ( -1.69506e-07  1.42427e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.100 sec. to    0.900 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10820     ( -0.250783   0.242931 )
Norm@50keV  : 1.370471E-02    ( -1.804585E-03   1.800937E-03) )
------------------------------------------------------------
 Chi-Squared =      59.88584     using    59 PHA bins.
 Reduced chi-squared =      1.050629     for     57 degrees of freedom
 Null hypothesis probability = 0.371
 
Photon flux (15-150 keV)    in 1.000 sec: 1.59093 ( -0.21477  0.21528 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42938e-07 ( -2.1135e-08  2.1279e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.100 sec. to    0.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10341     ( -0.252744   0.244611 )
Epeak [keV] : 9999.33      ( -9999.33 0.665039 )
Norm@50keV  : 1.377859E-02    ( -1.812264E-03   1.809778E-03) )
------------------------------------------------------------
 Chi-Squared =      59.90344     using    59 PHA bins.
 Reduced chi-squared =      1.069704     for     56 degrees of freedom
 Null hypothesis probability = 0.336
 
Photon flux (15-150 keV)    in 1.000 sec: 1.59047 ( -0.21471  0.21522 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42934e-07 ( -2.1108e-08  2.1309e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.100 sec. to    0.900 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.774531   ( -9.22547   5.72777 )
beta        : -1.12009    ( -8.87991   0.259078 )
Epeak [keV] : 98.3028      ( -98.2028 9899.87 )
Norm@50keV   : 2.383466E-02    ( -1.70818   591.225 )
------------------------------------------------------------
 Chi-Squared =      59.80341     using    59 PHA bins.
 Reduced chi-squared =      1.087335     for     55 degrees of freedom
 Null hypothesis probability = 0.306
 
Photon flux (15-150 keV)    in 1.000 sec: 1.59047 ( -0.21471  0.21522 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42873e-07 ( -2.1138e-08  2.1257e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 28 07:03:43 EST 2007