batgrbproduct Analysis for Trigger=305011

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Fri Mar  7 17:10:02 EST 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger305011/GCN5_download_cron
======================================================================

  Trigger: 00305011      Segment: 000

  BAT Trigger Time: 226581813.44   [s; MET]
      Trigger Stop: 226581821.632   [s; MET]
               UTC: 2008-03-07T11:23:30.814100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 136.632785318983   Dec: 35.1682786660791  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.15
     Image Trigger?:     NO
     Rate S/N Ratio:     9  [ if not an image trigger ]
     Image S/N Ratio:    7.15

  Flight Position:   [ source = BAT ]
    RA: 136.632785318983   Dec: 35.1682786660791  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 136.628982318693   Dec: 35.1513794986496  [deg; J2000]  
        { 09h 06m 31.0s , +35d 09' 05.0" }
         +/- 1.56546563959789 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.946973935278912 [arcmin] (formal 1-sigma fit error)
    SNR: 16.0345280007577
    RA  =   9h  6m 31.0s  (136.628982 deg.)
    Dec =  35d  9'  5" (35.151379 deg.)
 
  Angular difference between Flight and Ground position is 1.030968 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 101.423999994993 +/- 24.6783280638892
        Measured from: 3.64800000190735
                   to: 105.071999996901     [s; relative to TRIGTIME]
     T50: 49.7480000257492 +/- 29.2304041631796
        Measured from: 14.4679999947548
                   to: 64.216000020504     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.89599999785423     
                   to: 2.89599999785423     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1.69200000166893     
                   to: 146.127999991179     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.607888   0.564232   0.330060   0.125570
           0.058905   0.059026   0.051701   0.043741 [error]
 Peak      0.014215   0.010550   0.017495   0.012843
           0.005328   0.005387   0.004880   0.004059 [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 1.56e-07 2.42e-07 2.83e-07 6.39e-07 8.68e-07 1.32e-06   erg/cm2
              Error 2.70e-08 2.70e-08 5.12e-08 2.39e-07 1.18e-07 2.87e-07   erg/cm2
Peak flux Power-law 5.32e-02 9.26e-02 1.23e-01 3.35e-01 3.59e-01 6.04e-01   ph/cm2/s
              Error 5.12e-02 7.24e-02 3.66e-02 2.87e-01 1.23e-01 2.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.56e-07 2.42e-07 2.83e-07 6.34e-07 8.68e-07 1.31e-06   erg/cm2
              Error 2.70e-08 2.70e-08 5.12e-08 2.37e-07 1.18e-07 2.85e-07   erg/cm2
Peak flux Cutoff-PL 5.30e-02 9.25e-02 1.23e-01 3.33e-01 3.59e-01 6.02e-01   ph/cm2/s
              Error 5.12e-02 7.24e-02 3.67e-02 2.86e-01 1.24e-01 2.52e-01   ph/cm2/s
 
Fluence        Band 1.54e-07 2.46e-07 2.76e-07 5.90e-07 8.59e-07 1.28e-06   erg/cm2
              Error 2.26e-08 2.28e-08 3.82e-08 1.87e-07 1.16e-07 2.23e-07   erg/cm2
Peak flux      Band 5.31e-02 9.26e-02 1.23e-01 3.33e-01 3.59e-01 5.54e-01   ph/cm2/s
              Error 5.30e-02 7.24e-02 3.67e-02 2.87e-01 1.24e-01 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.773    0.214    -      -           6.52e-04 8.50e-05   54.614 57
CPL   1.624    0.000     112.4 5000.0      7.89e-04 8.57e-05   55.006 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.589    0.768    -      -           3.07e-03 1.26e-03   66.184 57
CPL   2.140    4.974      47.4 5000.0      3.76e-04 7.09e-04   65.985  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: 35.072000 sec.
T50 in the 50-300 keV band: 16.896000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  144.436    1.692  146.128
T90   101.424    3.648  105.072
T50    49.748   14.468   64.216
Peak    1.000    1.896    2.896

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  136.6290 +35.1514 0.0121   14.6   99.3       1.0916    16.0  TRIG_00305011       
------------------------------------------
 
Foreground time interval of the image:
  1.692  48.561 (delta_t =  46.869 [sec])
Background time interval of the image:
-239.440   1.692 (delta_t = 241.132 [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    1.692 sec. to  146.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77335     ( -0.210335   0.217224 )
Norm@50keV  : 6.520966E-04    ( -8.608343E-05   8.390361E-05) )
------------------------------------------------------------
 Chi-Squared =      54.61395     using    59 PHA bins.
 Reduced chi-squared =     0.9581395     for     57 degrees of freedom
 Null hypothesis probability = 0.565
 
Photon flux (15-150 keV)    in 144.4 sec: 8.894592E-02 ( -0.00997596  0.00998094 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67765e-07 ( -1.16336e-07  1.18789e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.692 sec. to  146.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62405     (     )
Epeak [keV] : 112.379      ( -9998.86 1.12793 )
Norm@50keV  : 7.890713E-04    ( -8.406973E-05   8.728949E-05) )
------------------------------------------------------------
 Chi-Squared =      55.00592     using    59 PHA bins.
 Reduced chi-squared =     0.9822485     for     56 degrees of freedom
 Null hypothesis probability = 0.513
 
Photon flux (15-150 keV)    in 144.4 sec: 8.891646E-02 ( -0.0099727  0.00997785 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67776e-07 ( -1.16422e-07  1.18744e-07 ) ergs/cm2
 
Band function
Time interval is from    1.692 sec. to  146.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.24788   ( -10.4281   2.86559 )
beta        : -1.80309    ( -0.310738   0.273447 )
Epeak [keV] : 37.7557      ( -28.3842 9971.52 )
Norm@50keV   : 1.578768E-03    ( -0.317603   126.745 )
------------------------------------------------------------
 Chi-Squared =      54.33550     using    59 PHA bins.
 Reduced chi-squared =     0.9879183     for     55 degrees of freedom
 Null hypothesis probability = 0.500
 
Photon flux (15-150 keV)    in 144.4 sec: 8.891660E-02 ( -0.010138  0.0099075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.58543e-07 ( -1.24551e-07  1.06979e-07 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    1.896 sec. to    2.896 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.588583     ( -0.863642   0.672714 )
Norm@50keV  : 3.072015E-03    ( -1.376344E-03   1.146896E-03) )
------------------------------------------------------------
 Chi-Squared =      66.18379     using    59 PHA bins.
 Reduced chi-squared =      1.161119     for     57 degrees of freedom
 Null hypothesis probability = 0.190
 
Photon flux (15-150 keV)    in 1.000 sec: 0.359191 ( -0.12016  0.12504 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94837e-08 ( -1.21404e-08  1.21275e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.896 sec. to    2.896 sec.
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14048     ( -4.15619   5.79272 )
Epeak [keV] : 47.4370      ( -47.4267 9952.56 )
Norm@50keV  : 3.763819E-04    ( -3.763819E-04   1.041381E-03) )
------------------------------------------------------------
 Chi-Squared =      65.98454     using    59 PHA bins.
 but latest trial  1.417949E-03 gives Chi-Squared =   2.33328
 Reduced chi-squared =      1.178295     for     56 degrees of freedom
 Null hypothesis probability = 0.170
 
Photon flux (15-150 keV)    in 1.000 sec: 0.358982 ( -0.122576  0.124997 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.95283e-08 ( -1.21877e-08  1.21264e-08 ) ergs/cm2
 
Band function
Time interval is from    1.896 sec. to    2.896 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.874936   ( -9.12506   5.87494 )
beta        : -0.589901    ( -0.671401   0.864963 )
Epeak [keV] : 16.4668      ( -16.3668 9983.53 )
Norm@50keV   : 4.295942E-03    ( -4.295942E-03   43047.4 )
------------------------------------------------------------
 Chi-Squared =      66.18382     using    59 PHA bins.
 Reduced chi-squared =      1.203342     for     55 degrees of freedom
 Null hypothesis probability = 0.144
 
Photon flux (15-150 keV)    in 1.000 sec: 0.358983 ( -0.122577  0.124996 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.95026e-08 ( -1.2181e-08  1.21014e-08 ) ergs/cm2
 
Plot creation:
Fri Mar  7 17:37:11 EST 2008