batgrbproduct Analysis for Trigger=306737

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Wed Mar 19 09:54:25 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger306737/GCN5_download_cron
======================================================================

  Trigger: 00306737      Segment: 000

  BAT Trigger Time: 227572375.168   [s; MET]
      Trigger Stop: 227572383.36   [s; MET]
               UTC: 2008-03-18T22:32:52.515040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 272.517375923447   Dec: -19.0438737356187  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.49
     Image Trigger?:     NO
     Rate S/N Ratio:     10.5830052442584  [ if not an image trigger ]
     Image S/N Ratio:    6.49

  Flight Position:   [ source = BAT ]
    RA: 272.517375923447   Dec: -19.0438737356187  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 272.530674880145   Dec: -19.0386019996607  [deg; J2000]  
        { 18h 10m 07.4s , -19d 02' 19.0" }
         +/- 5.38701565954659 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.40913193121487 [arcmin] (formal 1-sigma fit error)
    SNR: 2.74369090000538
    RA  =  18h 10m  7.4s  (272.530675 deg.)
    Dec =  -19d  2' 19" (-19.038602 deg.)
 
  Angular difference between Flight and Ground position is 0.817914 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 8.19200000166893 +/- 
        Measured from: 0
                   to: 8.19200000166893     [s; relative to TRIGTIME]
     T50: 8.19200000166893 +/- 
        Measured from: 0
                   to: 8.19200000166893     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 8.19200000166893 second)
        Measured from: -1.49011611938477e-08     
                   to: 8.19199998676777     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 8.19200000166893     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.102824   0.020155  -0.016536  -0.010615
           0.015798   0.013487   0.011288   0.009642 [error]
 Peak      0.102824   0.020155  -0.016536  -0.010615
           0.015798   0.013487   0.011288   0.009642 [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 3.05e-08 7.50e-09 9.63e-10 1.38e-10 3.90e-08 3.90e-08   erg/cm2
              Error 7.72e-09 5.40e-09 1.73e-09 5.54e-10 1.28e-08 1.29e-08   erg/cm2
Peak flux Power-law 1.29e-01 1.83e-02 1.18e-03 8.02e-05 1.48e-01 1.48e-01   ph/cm2/s
              Error 3.22e-02 1.26e-02 2.05e-03 2.98e-04 4.06e-02 4.07e-02   ph/cm2/s
 
Fluence   Cutoff-PL 3.04e-08 7.50e-09 9.60e-10 1.37e-10 3.90e-08 3.90e-08   erg/cm2
              Error 7.72e-09 5.40e-09 1.73e-09 5.50e-10 1.28e-08 1.29e-08   erg/cm2
Peak flux Cutoff-PL 1.29e-01 1.83e-02 1.17e-03 7.96e-05 1.48e-01 1.48e-01   ph/cm2/s
              Error 3.22e-02 1.26e-02 2.05e-03 2.96e-04 4.06e-02 4.06e-02   ph/cm2/s
 
Fluence        Band 3.01e-08 7.63e-09 1.00e-09 9.09e-11 3.83e-08 5.70e-08   erg/cm2
              Error 7.54e-09 5.41e-09 5.00e-10 1.08e-08 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 1.29e-01 1.83e-02 1.17e-03 7.96e-05 1.48e-01 1.48e-01   ph/cm2/s
              Error 3.22e-02 1.26e-02 2.05e-03 2.96e-04 4.06e-02 4.06e-02   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.698    1.263    -      -           1.31e-04 1.43e-04   33.202 57
CPL   1.466    0.000       3.1    6.3      8.41e-02 0.00e+00   32.471 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.698    1.263    -      -           1.31e-04 1.43e-04   33.202 57
CPL   1.466    0.000       3.1    6.3      8.41e-02 0.00e+00   32.471 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.192    0.000    8.192
T90     8.192    0.000    8.192
T50     8.192    0.000    8.192
Peak    8.192   -0.000    8.192

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  272.5307 -19.0386 0.0697    9.0 -147.3       0.0740     2.7  TRIG_00306737       
------------------------------------------
 
Foreground time interval of the image:
  0.000   8.192 (delta_t =   8.192 [sec])
Background time interval of the image:
-60.168 -23.168 (delta_t =  37.000 [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    0.000 sec. to    8.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.69790     ( -0.789492   1.73726 )
Norm@50keV  : 1.307490E-04    ( -1.307490E-04   1.546915E-04) )
------------------------------------------------------------
 Chi-Squared =      33.20204     using    59 PHA bins.
 Reduced chi-squared =     0.5824919     for     57 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148303 ( -0.040536  0.040737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90021e-08 ( -1.21889e-08  1.33944e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46592     (     )
Epeak [keV] : 3.11941      ( -4.47415 8.14309 )
Norm@50keV  : 8.411438E-02    (     )
------------------------------------------------------------
 Chi-Squared =      32.47107     using    59 PHA bins.
 Reduced chi-squared =     0.5798406     for     56 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148177 ( -0.040524  0.040723 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.89923e-08 ( -1.21949e-08  1.33938e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    8.192 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.15723   ( -0.842772   2.62768 )
beta        : -4.96139    ( -1.42671   1.02697 )
Epeak [keV] : 12.8431      ( -12.7431 9987.16 )
Norm@50keV   : 1.355233E-02    ( -1.355233E-02   2.439252E-02) )
------------------------------------------------------------
 Chi-Squared =      33.05709     using    59 PHA bins.
 Reduced chi-squared =     0.6010379     for     55 degrees of freedom
 Null hypothesis probability = 0.992
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148175 ( -0.040575  0.040725 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.82788e-08 ( -1.13085e-08  1.01992e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    8.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.69790     ( -0.789492   1.73726 )
Norm@50keV  : 1.307490E-04    ( -1.307490E-04   1.546915E-04) )
------------------------------------------------------------
 Chi-Squared =      33.20204     using    59 PHA bins.
 Reduced chi-squared =     0.5824919     for     57 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148303 ( -0.040536  0.040737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90021e-08 ( -1.21889e-08  1.33944e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    8.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46592     (     )
Epeak [keV] : 3.11941      ( -4.47415 8.14309 )
Norm@50keV  : 8.411438E-02    (     )
------------------------------------------------------------
 Chi-Squared =      32.47107     using    59 PHA bins.
 Reduced chi-squared =     0.5798406     for     56 degrees of freedom
 Null hypothesis probability = 0.995
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148177 ( -0.040524  0.040723 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.89923e-08 ( -1.21949e-08  1.33938e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    8.192 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.15723   ( -0.842772   2.62768 )
beta        : -4.96139    ( -1.42671   1.02697 )
Epeak [keV] : 12.8431      ( -12.7431 9987.16 )
Norm@50keV   : 1.355233E-02    ( -1.355233E-02   2.439252E-02) )
------------------------------------------------------------
 Chi-Squared =      33.05709     using    59 PHA bins.
 Reduced chi-squared =     0.6010379     for     55 degrees of freedom
 Null hypothesis probability = 0.992
 
Photon flux (15-150 keV)    in 8.192 sec: 0.148175 ( -0.040575  0.040725 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.82788e-08 ( -1.13085e-08  1.01992e-08 ) ergs/cm2
 
Plot creation:
Wed Mar 19 10:03:27 EDT 2008