batgrbproduct Analysis for Trigger=275119

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 17:20:32 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger275119/GCN5_download_cron
======================================================================

  Trigger: 00275119      Segment: 000

  BAT Trigger Time: 198034025.28   [s; MET]
      Trigger Stop: 198034025.792   [s; MET]
               UTC: 2007-04-12T01:27:03.395620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 181.505172705328   Dec: 40.1008001435465  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.32
     Image Trigger?:     NO
     Rate S/N Ratio:     8.94427190999916  [ if not an image trigger ]
     Image S/N Ratio:    7.32

  Flight Position:   [ source = BAT ]
    RA: 181.505172705328   Dec: 40.1008001435465  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 181.560971460627   Dec: 40.1241185951906  [deg; J2000]  
        { 12h 06m 14.6s , +40d 07' 26.8" }
         +/- 2.07796177046806 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.819713164983387 [arcmin] (formal 1-sigma fit error)
    SNR: 10.6991788335516
    RA  =  12h  6m 14.6s  (181.560971 deg.)
    Dec =  40d  7' 27" (40.124119 deg.)
 
  Angular difference between Flight and Ground position is 2.917757 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 48 +/- 35.7770876399966
        Measured from: -15.2800000011921
                   to: 32.7199999988079     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 0.719999998807907
                   to: 16.7199999988079     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.21999999880791     
                   to: 9.21999999880791     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.2800000011921     
                   to: 48.7199999988079     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.261278   0.355656   0.212649  -0.034682
           0.037297   0.038894   0.038127   0.041983 [error]
 Peak      0.114671   0.174811   0.117953   0.013654
           0.019094   0.019868   0.019372   0.021085 [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 7.70e-08 1.32e-07 1.73e-07 4.59e-07 5.07e-07 8.34e-07   erg/cm2
              Error 1.52e-08 1.73e-08 3.58e-08 1.96e-07 8.43e-08 2.31e-07   erg/cm2
Peak flux Power-law 6.61e-02 7.06e-02 5.35e-02 6.60e-02 2.15e-01 2.56e-01   ph/cm2/s
              Error 1.54e-02 9.98e-03 9.94e-03 2.57e-02 2.90e-02 3.77e-02   ph/cm2/s
 
Fluence   Cutoff-PL 7.17e-08 1.46e-07 1.67e-07 1.19e-07 4.57e-07 5.02e-07   erg/cm2
              Error 1.72e-08 2.49e-08 4.33e-08 2.89e-07 9.98e-08 3.06e-07   erg/cm2
Peak flux Cutoff-PL 6.25e-02 7.37e-02 5.44e-02 3.89e-02 2.11e-01 2.29e-01   ph/cm2/s
              Error 1.83e-02 1.31e-02 1.08e-02 4.61e-02 3.11e-02 5.39e-02   ph/cm2/s
 
Fluence        Band 7.11e-08 1.46e-07 1.64e-07 2.12e-07 4.62e-07 5.88e-07   erg/cm2
              Error 1.71e-08 2.66e-08 4.40e-08 3.02e-07 8.89e-08 2.70e-07   erg/cm2
Peak flux      Band 6.13e-02 2.40e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 4.90e-02 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    1.612    0.241    -      -           8.48e-04 1.28e-04   50.893 57
CPL   0.807    1.137      62.8 4977.1      2.45e-03 7.04e-03   49.099  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.399    0.250    -      -           1.77e-03 2.52e-04   66.443 57
CPL   1.006    0.962     117.6 4961.7      2.87e-03 7.23e-03   66.097  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: 15.808000 sec.
T50 in the 50-300 keV band: 7.232000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000  -15.280   48.720
T90    48.000  -15.280   32.720
T50    16.000    0.720   16.720
Peak    1.000    8.220    9.220

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  181.5610 +40.1241 0.0179   10.6  -65.7       0.5551    10.7  TRIG_00275119       
------------------------------------------
 
Foreground time interval of the image:
-15.280   8.721 (delta_t =  24.001 [sec])
Background time interval of the image:
-239.280 -15.280 (delta_t = 224.000 [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  -15.280 sec. to   48.720 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61204     ( -0.236839   0.244603 )
Norm@50keV  : 8.482373E-04    ( -1.294490E-04   1.266936E-04) )
------------------------------------------------------------
 Chi-Squared =      50.89274     using    59 PHA bins.
 Reduced chi-squared =     0.8928550     for     57 degrees of freedom
 Null hypothesis probability = 0.702
 
Photon flux (15-150 keV)    in 64.00 sec: 0.109413 ( -0.0142933  0.014294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.06975e-07 ( -8.27597e-08  8.57542e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -15.280 sec. to   48.720 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.807437     ( -1.32903   0.944243 )
Epeak [keV] : 62.8371      ( -17.1433 9937.16 )
Norm@50keV  : 2.447731E-03    ( -2.447731E-03   1.162836E-02) )
------------------------------------------------------------
 Chi-Squared =      49.09896     using    59 PHA bins.
 but latest trial   38.1710     gives Chi-Squared =   6.21587
 Reduced chi-squared =     0.8767672     for     56 degrees of freedom
 Null hypothesis probability = 0.731
 
Photon flux (15-150 keV)    in 64.00 sec: 0.105591 ( -0.014695  0.015048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.56517e-07 ( -9.41709e-08  1.05366e-07 ) ergs/cm2
 
Band function
Time interval is from  -15.280 sec. to   48.720 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.662573   ( -11.2507   3.37853 )
beta        : -2.35892    ( -8.19781   0.332560 )
Epeak [keV] : 57.7162      ( -31.0691 619.945 )
Norm@50keV   : 3.023295E-03    ( -30.5740   14.0857 )
------------------------------------------------------------
 Chi-Squared =      49.00867     using    59 PHA bins.
 Reduced chi-squared =     0.8910668     for     55 degrees of freedom
 Null hypothesis probability = 0.702
 
Photon flux (15-150 keV)    in 64.00 sec: 0.105946 ( -0.0150239  0.015206 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.62247e-07 ( -6.65805e-08  1.1125e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.720 sec. to   16.720 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39949     ( -0.248764   0.251412 )
Norm@50keV  : 1.767420E-03    ( -2.538641E-04   2.502683E-04) )
------------------------------------------------------------
 Chi-Squared =      66.44281     using    59 PHA bins.
 Reduced chi-squared =      1.165663     for     57 degrees of freedom
 Null hypothesis probability = 0.184
 
Photon flux (15-150 keV)    in 16.00 sec: 0.215214 ( -0.029018  0.029026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.73309e-07 ( -4.47392e-08  4.59312e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.720 sec. to   16.720 sec.
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00619     ( -1.41119   0.512411 )
Epeak [keV] : 117.602      ( -40.9600 9882.40 )
Norm@50keV  : 2.873526E-03    ( -1.338601E-03   1.311653E-02) )
------------------------------------------------------------
 Chi-Squared =      66.09650     using    59 PHA bins.
 but latest trial   1.90554     gives Chi-Squared =   10.6469
 but latest trial   49.2681     gives Chi-Squared =   5.65113
 Reduced chi-squared =      1.180295     for     56 degrees of freedom
 Null hypothesis probability = 0.167
 
Photon flux (15-150 keV)    in 16.00 sec: 0.211289 ( -0.031664  0.0306 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.61016e-07 ( -5.61136e-08  5.44576e-08 ) ergs/cm2
 
Band function
Time interval is from    0.720 sec. to   16.720 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.873607   ( -9.12639   2.01107 )
beta        : -1.74089    ( -8.25911   0.554412 )
Epeak [keV] : 94.4117      ( -84.3117 1554.35 )
Norm@50keV   : 3.448262E-03    ( -3.973253E-03   802.351 )
------------------------------------------------------------
 Chi-Squared =      65.73507     using    59 PHA bins.
 Reduced chi-squared =      1.195183     for     55 degrees of freedom
 Null hypothesis probability = 0.152
 
Photon flux (15-150 keV)    in 16.00 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Plot creation:
Thu Dec 13 17:42:21 EST 2007