batgrbproduct Analysis for Trigger=275087

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 17:02:57 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger275087/SDC
======================================================================

  Trigger: 00275087      Segment: 000

  BAT Trigger Time: 198015155.2   [s; MET]
      Trigger Stop: 198015159.296   [s; MET]
               UTC: 2007-04-11T20:12:33.316080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 107.337604211936   Dec: 1.08250430991337  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.52
     Image Trigger?:     NO
     Rate S/N Ratio:     8  [ if not an image trigger ]
     Image S/N Ratio:    10.52

  Flight Position:   [ source = BAT ]
    RA: 107.337604211936   Dec: 1.08250430991337  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 107.338763162796   Dec: 1.06329780074369  [deg; J2000]  
        { 07h 09m 21.3s , +01d 03' 47.9" }
         +/- 1.57641132699319 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.527230286587824 [arcmin] (formal 1-sigma fit error)
    SNR: 15.875715706925
    RA  =   7h  9m 21.3s  (107.338763 deg.)
    Dec =   1d  3' 48" (1.063298 deg.)
 
  Angular difference between Flight and Ground position is 1.154486 arcmin
 
  Partial Coding Fraction: 0.7421875    [ including projection effects ]

  Duration
     T90: 122.752000004053 +/- 17.1528452525509
        Measured from: -32.3599999845028
                   to: 90.3920000195503     [s; relative to TRIGTIME]
     T50: 65.0640000104904 +/- 4.09533785300885
        Measured from: 5.18400001525879
                   to: 70.2480000257492     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 70.2240000069141     
                   to: 71.2240000069141     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -60.4679999947548     
                   to: 109.536000013351     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.556404   1.739325   1.131037   0.299826
           0.076053   0.075491   0.065986   0.056767 [error]
 Peak      0.037091   0.041664   0.029884   0.006532
           0.005348   0.005619   0.004789   0.004028 [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 4.77e-07 7.56e-07 9.02e-07 2.10e-06 2.74e-06 4.24e-06   erg/cm2
              Error 4.56e-08 4.12e-08 6.76e-08 3.48e-07 1.56e-07 3.95e-07   erg/cm2
Peak flux Power-law 3.34e-01 3.22e-01 2.18e-01 2.30e-01 9.66e-01 1.10e+00   ph/cm2/s
              Error 7.84e-02 4.71e-02 4.02e-02 8.65e-02 1.37e-01 1.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.77e-07 7.57e-07 9.03e-07 2.08e-06 2.74e-06 4.08e-06   erg/cm2
              Error 4.56e-08 4.12e-08 6.78e-08 3.46e-07 1.56e-07 5.60e-07   erg/cm2
Peak flux Cutoff-PL 3.21e-01 3.31e-01 2.22e-01 1.70e-01 9.58e-01 1.04e+00   ph/cm2/s
              Error 8.97e-02 5.74e-02 4.41e-02 1.32e-01 1.39e-01 1.99e-01   ph/cm2/s
 
Fluence        Band 4.72e-07 7.55e-07 9.00e-07 2.09e-06 2.74e-06 4.22e-06   erg/cm2
              Error 4.76e-08 4.64e-08 6.84e-08 3.80e-07 1.59e-07 4.25e-07   erg/cm2
Peak flux      Band 3.18e-01 1.07e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 1.97e-01 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    1.745    0.104    -      -           1.75e-03 9.51e-05   55.799 57
CPL   1.711    0.000     481.4    0.0      1.81e-03 3.89e-04   56.123 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.568    0.247    -      -           7.59e-03 1.10e-03   53.402 57
CPL   1.336    1.015     139.1 5000.0      1.01e-02 1.87e-02   53.191 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: 97.024000 sec.
T50 in the 50-300 keV band: 51.648000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  170.004  -60.468  109.536
T90   122.752  -32.360   90.392
T50    65.064    5.184   70.248
Peak    1.000   70.224   71.224

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  107.3388  +1.0633 0.0121   29.2   14.2       2.1897    15.9  TRIG_00275087       
------------------------------------------
 
Foreground time interval of the image:
-60.468  39.805 (delta_t = 100.273 [sec])
Background time interval of the image:
-239.200 -60.468 (delta_t = 178.732 [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  -60.468 sec. to  109.536 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74456     ( -0.103315   0.104341 )
Norm@50keV  : 1.747688E-03    ( -9.546254E-05   9.473704E-05) )
------------------------------------------------------------
 Chi-Squared =      55.79889     using    59 PHA bins.
 Reduced chi-squared =     0.9789278     for     57 degrees of freedom
 Null hypothesis probability = 0.520
 
Photon flux (15-150 keV)    in 170.0 sec: 0.235843 ( -0.013069  0.013136 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.74237e-06 ( -1.55125e-07  1.55992e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -60.468 sec. to  109.536 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71081     (     )
Epeak [keV] : 481.410      (   )
Norm@50keV  : 1.810724E-03    ( -1.310743E-04   6.459717E-04) )
------------------------------------------------------------
 Chi-Squared =      56.12290     using    59 PHA bins.
 Reduced chi-squared =      1.002195     for     56 degrees of freedom
 Null hypothesis probability = 0.470
 
Photon flux (15-150 keV)    in 170.0 sec: 0.235731 ( -0.013063  0.01313 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.74234e-06 ( -1.55074e-07  1.564e-07 ) ergs/cm2
 
Band function
Time interval is from  -60.468 sec. to  109.536 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29243   ( -8.70757   3.21381 )
beta        : -1.74953    ( -0.145341   0.107492 )
Epeak [keV] : 35.1839      ( -35.0839 9964.82 )
Norm@50keV   : 3.960724E-03    ( -3.960724E-03   24.2938 )
------------------------------------------------------------
 Chi-Squared =      55.76032     using    59 PHA bins.
 Reduced chi-squared =      1.013824     for     55 degrees of freedom
 Null hypothesis probability = 0.446
 
Photon flux (15-150 keV)    in 170.0 sec: 0.235757 ( -0.014549  0.012989 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.73901e-06 ( -1.63455e-07  1.53595e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   70.224 sec. to   71.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56785     ( -0.244455   0.248825 )
Norm@50keV  : 7.593196E-03    ( -1.111014E-03   1.094735E-03) )
------------------------------------------------------------
 Chi-Squared =      53.40158     using    59 PHA bins.
 Reduced chi-squared =     0.9368699     for     57 degrees of freedom
 Null hypothesis probability = 0.611
 
Photon flux (15-150 keV)    in 1.000 sec: 0.966296 ( -0.136424  0.136624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.13136e-08 ( -1.11937e-08  1.1328e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   70.224 sec. to   71.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33564     ( -1.11383   0.915869 )
Epeak [keV] : 139.112      ( -139.102 9860.89 )
Norm@50keV  : 1.005082E-02    ( -1.005082E-02   2.740530E-02) )
------------------------------------------------------------
 Chi-Squared =      53.19100     using    59 PHA bins.
 Reduced chi-squared =     0.9498393     for     56 degrees of freedom
 Null hypothesis probability = 0.582
 
Photon flux (15-150 keV)    in 1.000 sec: 0.958244 ( -0.139165  0.138306 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.0094e-08 ( -1.23366e-08  1.21421e-08 ) ergs/cm2
 
Band function
Time interval is from   70.224 sec. to   71.224 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.08162   ( -8.91838   3.87854 )
beta        : -1.72164    ( -8.27836   0.386612 )
Epeak [keV] : 77.0226      ( -76.9226 2282.28 )
Norm@50keV   : 1.444458E-02    ( -31.1235   1780.66 )
------------------------------------------------------------
 Chi-Squared =      53.14701     using    59 PHA bins.
 Reduced chi-squared =     0.9663094     for     55 degrees of freedom
 Null hypothesis probability = 0.546
 
Photon flux (15-150 keV)    in 1.000 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Thu Dec 13 17:19:39 EST 2007