batgrbproduct Analysis for Trigger=287364

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Mon Dec 17 18:48:23 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger287364/SDC
======================================================================

  Trigger: 00287364      Segment: 000

  BAT Trigger Time: 208404714.56   [s; MET]
      Trigger Stop: 208404715.584   [s; MET]
               UTC: 2007-08-10T02:11:52.414980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 189.939176238456   Dec: 10.7444551264059  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.68
     Image Trigger?:     NO
     Rate S/N Ratio:     20.7846096908265  [ if not an image trigger ]
     Image S/N Ratio:    12.68

  Flight Position:   [ source = BAT ]
    RA: 189.939176238456   Dec: 10.7444551264059  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 189.946848503976   Dec: 10.7468678570967  [deg; J2000]  
        { 12h 39m 47.2s , +10d 44' 48.7" }
         +/- 1.31237592405665 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.478894128494004 [arcmin] (formal 1-sigma fit error)
    SNR: 20.6283138643885
    RA  =  12h 39m 47.2s  (189.946849 deg.)
    Dec =  10d 44' 49" (10.746868 deg.)
 
  Angular difference between Flight and Ground position is 0.474867 arcmin
 
  Partial Coding Fraction: 0.5390625    [ including projection effects ]

  Duration
     T90: 11.0320000052452 +/- 4.9906412396737
        Measured from: -1.61199998855591
                   to: 9.4200000166893     [s; relative to TRIGTIME]
     T50: 3.75999999046326 +/- 0.564793771652564
        Measured from: 0.236000001430511
                   to: 3.99599999189377     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.111999988555908     
                   to: 0.888000011444092     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.07199999690056     
                   to: 14.2639999985695     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.447303   0.479257   0.226266   0.026893
           0.029062   0.029539   0.025545   0.022214 [error]
 Peak      0.061927   0.087233   0.045708   0.011974
           0.007601   0.007972   0.006765   0.005468 [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 1.59e-07 2.10e-07 2.03e-07 3.51e-07 6.87e-07 9.25e-07   erg/cm2
              Error 1.79e-08 1.56e-08 2.54e-08 8.82e-08 5.83e-08 1.14e-07   erg/cm2
Peak flux Power-law 7.94e-01 6.36e-01 3.43e-01 2.70e-01 1.89e+00 2.04e+00   ph/cm2/s
              Error 1.32e-01 7.03e-02 5.65e-02 8.57e-02 2.11e-01 2.25e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.48e-07 2.25e-07 2.00e-07 1.29e-07 6.50e-07 7.08e-07   erg/cm2
              Error 2.10e-08 2.16e-08 2.88e-08 1.20e-07 6.74e-08 1.53e-07   erg/cm2
Peak flux Cutoff-PL 7.26e-01 6.90e-01 3.54e-01 1.21e-01 1.85e+00 1.89e+00   ph/cm2/s
              Error 1.53e-01 9.44e-02 6.41e-02 1.28e-01 2.17e-01 2.47e-01   ph/cm2/s
 
Fluence        Band 1.45e-07 2.26e-07 1.96e-07 1.96e-07 6.51e-07 7.74e-07   erg/cm2
              Error 2.10e-08 2.19e-08 2.99e-08 1.52e-07 7.61e-08 1.71e-07   erg/cm2
Peak flux      Band 7.26e-01 6.90e-01 3.54e-01 1.21e-01 1.85e+00 1.89e+00   ph/cm2/s
              Error 1.53e-01 9.45e-02 6.41e-02 1.28e-01 2.17e-01 2.48e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.047    0.144    -      -           4.29e-03 3.87e-04   47.449 57
CPL   1.386    0.678      40.4   28.2      1.00e-02 1.05e-02   44.116  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.890    0.195    -      -           1.33e-02 1.68e-03   52.151 57
CPL   1.170    0.884      52.4 4982.2      3.29e-02 5.64e-02   49.811 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: 4.672000 sec.
T50 in the 50-300 keV band: 2.368000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   17.336   -3.072   14.264
T90    11.032   -1.612    9.420
T50     3.760    0.236    3.996
Peak    1.000   -0.112    0.888

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  189.9468 +10.7469 0.0093   35.6  -40.0       1.2210    20.6  TRIG_00287364       
------------------------------------------
 
Foreground time interval of the image:
 -3.072  14.264 (delta_t =  17.336 [sec])
Background time interval of the image:
-239.560  -3.072 (delta_t = 236.488 [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   -3.072 sec. to   14.264 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04653     ( -0.141068   0.146272 )
Norm@50keV  : 4.286033E-03    ( -3.902738E-04   3.839610E-04) )
------------------------------------------------------------
 Chi-Squared =      47.44857     using    59 PHA bins.
 Reduced chi-squared =     0.8324311     for     57 degrees of freedom
 Null hypothesis probability = 0.812
 
Photon flux (15-150 keV)    in 17.34 sec: 0.657052 ( -0.050084  0.050163 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.87347e-07 ( -5.79121e-08  5.85901e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.072 sec. to   14.264 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38621     ( -0.732540   0.624044 )
Epeak [keV] : 40.4353      ( -40.4253 15.9794 )
Norm@50keV  : 1.001071E-02    ( -5.406981E-03   1.557551E-02) )
------------------------------------------------------------
 Chi-Squared =      44.11602     using    59 PHA bins.
 but latest trial   2.00491     gives Chi-Squared =   3.58417
 Reduced chi-squared =     0.7877861     for     56 degrees of freedom
 Null hypothesis probability = 0.875
 
Photon flux (15-150 keV)    in 17.34 sec: 0.637426 ( -0.053524  0.053281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.49529e-07 ( -6.67451e-08  6.80127e-08 ) ergs/cm2
 
Band function
Time interval is from   -3.072 sec. to   14.264 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.32550   ( -0.622167   1.24098 )
beta        : -2.63543    ( -7.36457   0.571551 )
Epeak [keV] : 39.6533      ( -14.6156 14.8596 )
Norm@50keV   : 1.095209E-02    ( -1.095209E-02   0.127710 )
------------------------------------------------------------
 Chi-Squared =      43.83736     using    59 PHA bins.
 Reduced chi-squared =     0.7970428     for     55 degrees of freedom
 Null hypothesis probability = 0.860
 
Photon flux (15-150 keV)    in 17.34 sec: 0.636566 ( -0.05333  0.053234 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50947e-07 ( -8.55001e-08  6.67677e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.112 sec. to    0.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.88973     ( -0.190592   0.200011 )
Norm@50keV  : 1.326023E-02    ( -1.697627E-03   1.663051E-03) )
------------------------------------------------------------
 Chi-Squared =      52.15102     using    59 PHA bins.
 Reduced chi-squared =     0.9149302     for     57 degrees of freedom
 Null hypothesis probability = 0.657
 
Photon flux (15-150 keV)    in 1.000 sec: 1.89474 ( -0.21138  0.21158 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21863e-07 ( -1.5237e-08  1.5507e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.112 sec. to    0.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17037     ( -0.976956   0.790642 )
Epeak [keV] : 52.3618      ( -16.8055 9947.64 )
Norm@50keV  : 3.288407E-02    ( -3.288407E-02   7.986939E-02) )
------------------------------------------------------------
 Chi-Squared =      49.81104     using    59 PHA bins.
 Reduced chi-squared =     0.8894828     for     56 degrees of freedom
 Null hypothesis probability = 0.707
 
Photon flux (15-150 keV)    in 1.000 sec: 1.85333 ( -0.21714  0.21657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16228e-07 ( -1.65258e-08  1.6793e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.112 sec. to    0.888 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.17061   ( -8.82939   0.882173 )
beta        : -6.47942    ( -3.52058   4.66695 )
Epeak [keV] : 52.3522      ( -14.4744 559.385 )
Norm@50keV   : 3.287200E-02    ( -7.791568E-03   5.328007E-02) )
------------------------------------------------------------
 Chi-Squared =      49.81098     using    59 PHA bins.
 Reduced chi-squared =     0.9056541     for     55 degrees of freedom
 Null hypothesis probability = 0.673
 
Photon flux (15-150 keV)    in 1.000 sec: 1.85340 ( -0.21718  0.21677 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Mon Dec 17 19:09:41 EST 2007