batgrbproduct Analysis for Trigger=282808

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Dec 14 02:54:04 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger282808/SDC
======================================================================

  Trigger: 00282808      Segment: 000

  BAT Trigger Time: 204160661.888   [s; MET]
      Trigger Stop: 204160662.912   [s; MET]
               UTC: 2007-06-21T23:17:39.850480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 323.80441851629   Dec: -24.80574107457  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.01
     Image Trigger?:     NO
     Rate S/N Ratio:     17.2916164657906  [ if not an image trigger ]
     Image S/N Ratio:    9.01

  Flight Position:   [ source = BAT ]
    RA: 323.80441851629   Dec: -24.80574107457  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 323.805273065559   Dec: -24.8083267443047  [deg; J2000]  
        { 21h 35m 13.3s , -24d 48' 30.0" }
         +/- 0.862371125570424 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.260971837694709 [arcmin] (formal 1-sigma fit error)
    SNR: 37.5823384137107
    RA  =  21h 35m 13.3s  (323.805273 deg.)
    Dec = -24d 48' 30" (-24.808327 deg.)
 
  Angular difference between Flight and Ground position is 0.161971 arcmin
 
  Partial Coding Fraction: 0.3164062    [ including projection effects ]

  Duration
     T90: 33.2960000038147 +/- 2.77631123696316
        Measured from: -2.15600001811981
                   to: 31.1399999856949     [s; relative to TRIGTIME]
     T50: 17.5719999969006 +/- 0.782163673283351
        Measured from: 4.42800000309944
                   to: 22     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.555999994278     
                   to: 22.555999994278     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.19600000977516     
                   to: 36.447999984026     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.757609   2.354437   1.914158   0.488299
           0.067585   0.067157   0.058979   0.045530 [error]
 Peak      0.072674   0.109863   0.088439   0.036563
           0.010904   0.011294   0.010167   0.007751 [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 6.28e-07 1.11e-06 1.49e-06 4.13e-06 4.33e-06 7.34e-06   erg/cm2
              Error 4.40e-08 4.46e-08 5.94e-08 3.83e-07 1.48e-07 4.09e-07   erg/cm2
Peak flux Power-law 7.64e-01 8.23e-01 6.31e-01 7.89e-01 2.52e+00 3.01e+00   ph/cm2/s
              Error 1.72e-01 1.11e-01 8.17e-02 2.22e-01 3.05e-01 3.37e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.18e-07 1.11e-06 1.50e-06 3.77e-06 4.32e-06 6.99e-06   erg/cm2
              Error 5.40e-08 4.57e-08 6.69e-08 8.33e-07 1.17e-07 8.43e-07   erg/cm2
Peak flux Cutoff-PL 7.63e-01 8.24e-01 6.31e-01 7.84e-01 2.51e+00 3.00e+00   ph/cm2/s
              Error 1.72e-01 1.11e-01 8.18e-02 2.20e-01 3.04e-01 3.37e-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 7.48e-01 8.17e-01 6.35e-01 8.06e-01 2.51e+00 3.02e+00   ph/cm2/s
              Error 9.95e-02 1.09e-01 7.68e-02 1.72e-01 2.96e-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    1.570    0.064    -      -           1.11e-02 3.70e-04   39.244 57
CPL   1.499    0.191     406.3 4954.1      1.19e-02 2.27e-03   39.013 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.385    0.205    -      -           2.07e-02 2.31e-03   61.228 57
CPL   1.381    0.206    9991.5 5000.0      2.08e-02 2.32e-03   61.242 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: 32.384000 sec.
T50 in the 50-300 keV band: 18.432000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   41.644   -5.196   36.448
T90    33.296   -2.156   31.140
T50    17.572    4.428   22.000
Peak    1.000   21.556   22.556

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  323.8053 -24.8083 0.0051   43.1   15.6       4.2214    37.6  TRIG_00282808       
------------------------------------------
 
Foreground time interval of the image:
 -5.196  17.917 (delta_t =  23.113 [sec])
Background time interval of the image:
-239.888  -5.196 (delta_t = 234.692 [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   -5.196 sec. to   36.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56988     ( -6.385887E-02   6.385517E-02) )
Norm@50keV  : 1.108313E-02    ( -3.697956E-04   3.697481E-04) )
------------------------------------------------------------
 Chi-Squared =      39.24357     using    59 PHA bins.
 Reduced chi-squared =     0.6884837     for     57 degrees of freedom
 Null hypothesis probability = 0.965
 
Photon flux (15-150 keV)    in 41.64 sec: 1.41127 ( -0.05505  0.05535 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.3326e-06 ( -1.47489e-07  1.47739e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.196 sec. to   36.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49930     ( -0.252696   0.129712 )
Epeak [keV] : 406.266      ( -314.483 9593.73 )
Norm@50keV  : 1.190821E-02    ( -1.151734E-03   3.385921E-03) )
------------------------------------------------------------
 Chi-Squared =      39.01262     using    59 PHA bins.
 Reduced chi-squared =     0.6966538     for     56 degrees of freedom
 Null hypothesis probability = 0.959
 
Photon flux (15-150 keV)    in 41.64 sec: 1.40388 ( -0.04768  0.05442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.31886e-06 ( -7.73255e-08  1.57191e-07 ) ergs/cm2
 
Band function
Time interval is from   -5.196 sec. to   36.448 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03058   ( -9.59942   1.95669 )
beta        : -1.57283    ( -6.671071E-02   6.530905E-02) )
Epeak [keV] : 39.9746      ( -334.117 9531.92 )
Norm@50keV   : 2.951346E-02    ( -1.030144E-03   2792.99 )
------------------------------------------------------------
 Chi-Squared =      39.14836     using    59 PHA bins.
 Reduced chi-squared =     0.7117883     for     55 degrees of freedom
 Null hypothesis probability = 0.948
 
Photon flux (15-150 keV)    in 41.64 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   21.556 sec. to   22.556 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38456     ( -0.206246   0.203190 )
Norm@50keV  : 2.072828E-02    ( -2.314202E-03   2.314011E-03) )
------------------------------------------------------------
 Chi-Squared =      61.22780     using    59 PHA bins.
 Reduced chi-squared =      1.074172     for     57 degrees of freedom
 Null hypothesis probability = 0.327
 
Photon flux (15-150 keV)    in 1.000 sec: 2.51562 ( -0.30375  0.30533 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00906e-07 ( -2.3824e-08  2.3949e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   21.556 sec. to   22.556 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38134     ( -0.207669   0.204457 )
Epeak [keV] : 9991.47      ( -9991.46 8.53223 )
Norm@50keV  : 2.080594E-02    ( -2.322562E-03   2.322534E-03) )
------------------------------------------------------------
 Chi-Squared =      61.24159     using    59 PHA bins.
 Reduced chi-squared =      1.093600     for     56 degrees of freedom
 Null hypothesis probability = 0.293
 
Photon flux (15-150 keV)    in 1.000 sec: 2.51475 ( -0.30364  0.30523 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00895e-07 ( -2.3779e-08  2.4007e-08 ) ergs/cm2
 
Band function
Time interval is from   21.556 sec. to   22.556 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.00158   ( -9.31842   3.29347 )
beta        : -1.38713    ( -5.20043   0.209291 )
Epeak [keV] : 54.9499      ( -38.4159 3943.81 )
Norm@50keV   : 4.248528E-02    ( -1.95675   5406.77 )
------------------------------------------------------------
 Chi-Squared =      61.20885     using    59 PHA bins.
 Reduced chi-squared =      1.112888     for     55 degrees of freedom
 Null hypothesis probability = 0.263
 
Photon flux (15-150 keV)    in 1.000 sec: 2.50832 ( -0.29173  0.30035 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00793e-07 ( -2.3833e-08  2.3941e-08 ) ergs/cm2
 
Plot creation:
Fri Dec 14 03:10:12 EST 2007