batgrbproduct Analysis for Trigger=207281

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 31 20:01:40 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger207281/SDC
======================================================================

  Trigger: 00207281      Segment: 000

  BAT Trigger Time: 167830992   [s; MET]
      Trigger Stop: 167831056   [s; MET]
               UTC: 2006-04-27T11:43:10.841740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 124.30315943152   Dec: 62.6173129548239  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.47
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.47

  Flight Position:   [ source = BAT ]
    RA: 124.30315943152   Dec: 62.6173129548239  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 124.194088221565   Dec: 62.6587266842417  [deg; J2000]  
        { 08h 16m 46.6s , +62d 39' 31.4" }
         +/- 2.24936396647531 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.29404752502249 [arcmin] (formal 1-sigma fit error)
    SNR: 9.55379467127791
    RA  =   8h 16m 46.6s  (124.194088 deg.)
    Dec =  62d 39' 31" (62.658727 deg.)
 
  Angular difference between Flight and Ground position is 3.901449 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 62 +/- 16.4924225024706
        Measured from: -8
                   to: 54     [s; relative to TRIGTIME]
     T50: 28 +/- 10.295630140987
        Measured from: 1
                   to: 29     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5     
                   to: 6     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -10     
                   to: 61     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.326206   0.354820   0.193737   0.039705
           0.043565   0.044150   0.038437   0.032294 [error]
 Peak      0.012509   0.010430   0.006553   0.004880
           0.005410   0.005264   0.004581   0.003757 [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 1.03e-07 1.47e-07 1.57e-07 3.12e-07 5.04e-07 7.17e-07   erg/cm2
              Error 2.20e-08 2.08e-08 3.92e-08 1.60e-07 8.81e-08 1.98e-07   erg/cm2
Peak flux Power-law 1.15e-01 9.00e-02 4.72e-02 3.58e-02 2.69e-01 2.88e-01   ph/cm2/s
              Error 8.34e-02 4.51e-02 4.36e-02 6.94e-02 1.29e-01 1.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.03e-07 1.48e-07 1.57e-07 3.09e-07 5.04e-07 7.20e-07   erg/cm2
              Error 2.20e-08 2.08e-08 3.92e-08 1.58e-07 8.82e-08 1.97e-07   erg/cm2
Peak flux Cutoff-PL 1.15e-01 9.00e-02 4.72e-02 3.55e-02 2.69e-01 2.86e-01   ph/cm2/s
              Error 8.34e-02 4.52e-02 4.36e-02 6.90e-02 1.29e-01 1.41e-01   ph/cm2/s
 
Fluence        Band 9.77e-08 1.47e-07 1.63e-07 3.38e-07 5.10e-07 7.72e-07   erg/cm2
              Error 1.52e-08 2.08e-08 2.45e-08 1.09e-07 7.51e-08 0.00e+00   erg/cm2
Peak flux      Band 1.15e-01 9.00e-02 4.72e-02 3.58e-02 2.69e-01 2.88e-01   ph/cm2/s
              Error 6.65e-02 4.31e-02 2.95e-02 3.67e-02 1.29e-01 1.41e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.906    0.288    -      -           7.73e-04 1.37e-04   44.971 57
CPL   1.887    0.289    9998.3 5000.0      7.76e-04 1.38e-04   44.984 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.931    1.278    -      -           1.85e-03 1.47e-03   51.050 57
CPL   3.297    2.068     360.6 4842.7      4.32e-04 3.52e-02   50.433  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   71.000  -10.000   61.000
T90    62.000   -8.000   54.000
T50    28.000    1.000   29.000
Peak    1.000    5.000    6.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  124.1941 +62.6587 0.0200   24.5 -122.2       0.8548     9.6  TRIG_00207281       
------------------------------------------
 
Foreground time interval of the image:
-10.000  61.000 (delta_t =  71.000 [sec])
Background time interval of the image:
-239.000 -10.000 (delta_t = 229.000 [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  -10.000 sec. to   61.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90566     ( -0.277178   0.297985 )
Norm@50keV  : 7.725845E-04    ( -1.401856E-04   1.339341E-04) )
------------------------------------------------------------
 Chi-Squared =      44.97091     using    59 PHA bins.
 Reduced chi-squared =     0.7889633     for     57 degrees of freedom
 Null hypothesis probability = 0.876
 
Photon flux (15-150 keV)    in 71.00 sec: 0.111141 ( -0.0157249  0.015735 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.04344e-07 ( -8.69835e-08  8.92995e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -10.000 sec. to   61.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88747     ( -0.261557   0.317424 )
Epeak [keV] : 9998.34      ( -9998.33 1.66504 )
Norm@50keV  : 7.763755E-04    ( -1.447300E-04   1.316941E-04) )
------------------------------------------------------------
 Chi-Squared =      44.98351     using    59 PHA bins.
 Reduced chi-squared =     0.8032770     for     56 degrees of freedom
 Null hypothesis probability = 0.854
 
Photon flux (15-150 keV)    in 71.00 sec: 0.111100 ( -0.0157194  0.01573 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0428e-07 ( -8.69814e-08  8.9345e-08 ) ergs/cm2
 
Band function
Time interval is from  -10.000 sec. to   61.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48890   ( -8.51110   6.48890 )
beta        : -1.90174    ( -0.302933   0.273723 )
Epeak [keV] : 11.8236      ( -11.7236 9988.18 )
Norm@50keV   : 2.316236E-03    ( -2.316236E-03   84.8971 )
------------------------------------------------------------
 Chi-Squared =      44.97143     using    59 PHA bins.
 Reduced chi-squared =     0.8176624     for     55 degrees of freedom
 Null hypothesis probability = 0.831
 
Photon flux (15-150 keV)    in 71.00 sec: 0.110993 ( -0.0156316  0.015647 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0993e-07 ( -7.7373e-08  7.28105e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    5.000 sec. to    6.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93139     ( -1.02785   1.52891 )
Norm@50keV  : 1.847400E-03    ( -1.847400E-03   1.097027E-03) )
------------------------------------------------------------
 Chi-Squared =      51.04993     using    59 PHA bins.
 Reduced chi-squared =     0.8956128     for     57 degrees of freedom
 Null hypothesis probability = 0.697
 
Photon flux (15-150 keV)    in 1.000 sec: 0.268789 ( -0.128832  0.128806 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70196e-08 ( -1.70196e-08  1.08243e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    5.000 sec. to    6.000 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 3.29737     ( -3.88871   0.247296 )
Epeak [keV] : 360.639      ( -46.0045 9639.36 )
Norm@50keV  : 4.315844E-04    ( -4.315844E-04   6.999228E-02) )
------------------------------------------------------------
 Chi-Squared =      50.43254     using    59 PHA bins.
 but latest trial   3.56143     gives Chi-Squared =  2.547836E-02
 but latest trial   314.634     gives Chi-Squared =  3.173447E-02
 Reduced chi-squared =     0.9005811     for     56 degrees of freedom
 Null hypothesis probability = 0.685
 
Photon flux (15-150 keV)    in 1.000 sec: 0.268679 ( -0.128795  0.12877 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69907e-08 ( -1.69907e-08  1.08565e-08 ) ergs/cm2
 
Band function
Time interval is from    5.000 sec. to    6.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.47636   ( -8.52364   6.47636 )
beta        : -1.91226    ( -8.08774   1.00683 )
Epeak [keV] : 17.0940      ( -16.9940 9982.91 )
Norm@50keV   : 4.980370E-03    ( -4.980369E-03   0.376500 )
------------------------------------------------------------
 Chi-Squared =      51.05114     using    59 PHA bins.
 Reduced chi-squared =     0.9282026     for     55 degrees of freedom
 Null hypothesis probability = 0.626
 
Photon flux (15-150 keV)    in 1.000 sec: 0.268790 ( -0.128659  0.128678 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68361e-08 ( -8.0628e-09  1.10064e-08 ) ergs/cm2
 
Plot creation:
Mon Dec 31 20:22:37 EST 2007