batgrbproduct Analysis for Trigger=353728

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Aug 11 09:01:55 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/353728
======================================================================

  Trigger: 00353728      Segment: 000

  BAT Trigger Time: 265487760.96   [s; MET]
      Trigger Stop: 265487761.984   [s; MET]
               UTC: 2009-05-31T18:35:56.171780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 252.064493860549   Dec: -36.0245188355297  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.06
     Image Trigger?:     NO
     Rate S/N Ratio:     48.4148737476408  [ if not an image trigger ]
     Image S/N Ratio:    11.06

  Flight Position:   [ source = BAT ]
    RA: 252.064493860549   Dec: -36.0245188355297  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 252.050688969081   Dec: -36.037127031726  [deg; J2000]  
        { 16h 48m 12.2s , -36d 02' 13.7" }
         +/- 1.63198880865965 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.668315481024165 [arcmin] (formal 1-sigma fit error)
    SNR: 15.1090340389334
 
  Angular difference between Flight and Ground position is 1.010429 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 54.9959999918938 +/- 6.13174035585667
        Measured from: 0.439999997615814
                   to: 55.4359999895096     [s; relative to TRIGTIME]
     T50: 35.9600000083447 +/- 13.3353342529601
        Measured from: 1.60400000214577
                   to: 37.5640000104904     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.25     
                   to: 1.25     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.252000004053116     
                   to: 56.1319999992847     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.345998   0.326109   0.291201   0.099008
           0.041058   0.038554   0.032767   0.027373 [error]
 Peak      0.049431   0.071160   0.087575   0.033764
           0.006105   0.006183   0.006147   0.005355 [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 8.40e-08 1.53e-07 2.14e-07 6.25e-07 6.13e-07 1.08e-06   erg/cm2
              Error 1.68e-08 1.77e-08 3.29e-08 2.16e-07 7.75e-08 2.39e-07   erg/cm2
Peak flux Power-law 3.73e-01 5.21e-01 5.37e-01 1.01e+00 1.75e+00 2.45e+00   ph/cm2/s
              Error 6.52e-02 5.30e-02 4.82e-02 2.11e-01 1.42e-01 2.31e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.43e-08 1.53e-07 2.13e-07 6.16e-07 6.10e-07 1.08e-06   erg/cm2
              Error 1.68e-08 1.74e-08 3.25e-08 2.23e-07 7.74e-08 2.11e-07   erg/cm2
Peak flux Cutoff-PL 3.74e-01 5.21e-01 5.37e-01 1.01e+00 1.75e+00 2.44e+00   ph/cm2/s
              Error 6.58e-02 5.30e-02 4.84e-02 3.17e-01 1.41e-01 2.85e-01   ph/cm2/s
 
Fluence        Band 8.50e-08 1.52e-07 2.14e-07 6.29e-07 6.14e-07 1.17e-06   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 3.73e-01 5.21e-01 5.38e-01 1.01e+00 1.75e+00 2.44e+00   ph/cm2/s
              Error 0.00e+00 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    1.516    0.214    -      -           1.16e-03 1.31e-04   57.260 57
CPL   2.240    0.000      87.5    0.0      5.05e-04 0.00e+00   56.110 56
 
The chi2 of BB fit is  which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.955    0.153    -      -           1.53e-02 1.22e-03   64.490 57
CPL   0.955    0.155    9999.4    0.0      1.53e-02 3.49e-03   64.530 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: 110.784000 sec.
T50 in the 50-300 keV band: 61.568000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   55.880    0.252   56.132
T90    54.996    0.440   55.436
T50    35.960    1.604   37.564
Peak    1.000    0.250    1.250

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  252.0507 -36.0371 0.0128   12.6   11.9       1.1103    15.1  TRIG_00353728       
------------------------------------------
 
Foreground time interval of the image:
  0.252  56.132 (delta_t =  55.880 [sec])
Background time interval of the image:
-620.859 -588.914 (delta_t =  31.945 [sec])
-239.960   0.252 (delta_t = 240.212 [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    0.252 sec. to   56.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51634     ( -0.213741   0.214956 )
Norm@50keV  : 1.15970E-03    ( -0.000132125   0.000130725 )
------------------------------------------------------------
# Chi-Squared =          57.26 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     57 degrees of freedom 
# Null hypothesis probability =   4.655230e-01
 
Photon flux (15-150 keV)    in 55.88 sec: 0.145422 ( -0.0163011  0.0163596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.13154e-07 ( -7.70088e-08  7.80141e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.252 sec. to   56.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.24007     (     )
Epeak [keV] : 87.5403      (   )
Norm@50keV  : 5.04593E-04    (     )
------------------------------------------------------------
# Chi-Squared =          56.11 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     56 degrees of freedom 
# Null hypothesis probability =   4.708941e-01
 
Photon flux (15-150 keV)    in 55.88 sec: 0.145393 ( -0.016189  0.016294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.10489e-07 ( -7.43808e-08  8.04672e-08 ) ergs/cm2
 
Band function
Time interval is from    0.252 sec. to   56.132 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.95632   ( -45.7208   -45.7208 )
beta        : -1.54796    ( -0.237346   0.226469 )
Epeak [keV] : 21.1635      ( -21.156 5.2831 )
Norm@50keV   : 322.855    ( -323.94   66477 )
------------------------------------------------------------
# Chi-Squared =          57.13 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     55 degrees of freedom 
# Null hypothesis probability =   3.959459e-01
 
Photon flux (15-150 keV)    in 55.88 sec: 4.36489 ( -4.36489  4974.54 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.13719e-07 ( -6.93102e-08  6.68604e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from    0.250 sec. to    1.250 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.954544     ( -0.154676   0.151851 )
Norm@50keV  : 1.52568E-02    ( -0.00122264   0.00122006 )
------------------------------------------------------------
# Chi-Squared =          64.49 using 59 PHA bins.
# Reduced chi-squared =          1.131 for     57 degrees of freedom 
# Null hypothesis probability =   2.313518e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75311 ( -0.141646  0.141904 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.67722e-07 ( -1.52321e-08  1.5363e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.250 sec. to    1.250 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.955344     ( -0.161505   0.14756 )
Epeak [keV] : 9999.36      ( -9999.96 -9999.96 )
Norm@50keV  : 1.53287E-02    ( -0.0012178   0.00576915 )
------------------------------------------------------------
# Chi-Squared =          64.53 using 59 PHA bins.
# Reduced chi-squared =          1.152 for     56 degrees of freedom 
# Null hypothesis probability =   2.031221e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75291 ( -0.14099  0.14121 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.67774e-07 ( -1.5271e-08  1.5287e-08 ) ergs/cm2
 
Band function
Time interval is from    0.250 sec. to    1.250 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.849212   ( 0.849242   0.849242 )
beta        : -0.954536    ( -0.151887   0.154665 )
Epeak [keV] : 30.5560      ( -30.5017 -30.5017 )
Norm@50keV   : 2.29671E-02    ( -0.00862299   2.21647 )
------------------------------------------------------------
# Chi-Squared =          64.49 using 59 PHA bins.
# Reduced chi-squared =          1.172 for     55 degrees of freedom 
# Null hypothesis probability =   1.788222e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.75252 ( -0.14175  0.07159 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.67568e-07 ( -1.5178e-08  1.5421e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Fri May 27 11:00:34 EDT 2011