batgrbproduct Analysis for Trigger=355303

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Tue Aug 11 11:08:32 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/355303
======================================================================

  Trigger: 00355303      Segment: 000

  BAT Trigger Time: 267250968   [s; MET]
      Trigger Stop: 267250976.192   [s; MET]
               UTC: 2009-06-21T04:22:43.155300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 10.9861581404119   Dec: 61.9679004327154  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.8
     Image Trigger?:     NO
     Rate S/N Ratio:     7.28010988928052  [ if not an image trigger ]
     Image S/N Ratio:    7.8

  Flight Position:   [ source = BAT ]
    RA: 10.9861581404119   Dec: 61.9679004327154  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 10.9851072586115   Dec: 61.9391426772234  [deg; J2000]  
        { 00h 43m 56.4s , +61d 56' 20.9" }
         +/- 1.71502749355647 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.656272574914316 [arcmin] (formal 1-sigma fit error)
    SNR: 14.0749026314218
 
  Angular difference between Flight and Ground position is 1.725720 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 219.076000005007 +/- 72.2732915725468
        Measured from: -1.3759999871254
                   to: 217.700000017881     [s; relative to TRIGTIME]
     T50: 106.504000008106 +/- 60.4780773470141
        Measured from: 77.3199999928474
                   to: 183.824000000954     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 240.291999995708     
                   to: 241.291999995708     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.6920000016689     
                   to: 241.747999995947     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.623346   1.941308   1.308096   0.190852
           0.083779   0.086650   0.076325   0.066552 [error]
 Peak      0.100562   0.114107   0.066591   0.017786
           0.006301   0.006480   0.005536   0.004135 [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 5.07e-07 8.25e-07 1.01e-06 2.46e-06 3.04e-06 4.81e-06   erg/cm2
              Error 4.56e-08 4.46e-08 7.73e-08 4.01e-07 1.81e-07 4.63e-07   erg/cm2
Peak flux Power-law 1.02e+00 8.55e-01 4.89e-01 4.15e-01 2.54e+00 2.78e+00   ph/cm2/s
              Error 9.02e-02 5.17e-02 4.64e-02 7.52e-02 1.54e-01 1.73e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.75e-07 8.55e-07 1.03e-06 1.37e-06 2.94e-06 3.74e-06   erg/cm2
              Error 5.47e-08 5.37e-08 8.23e-08 7.91e-07 2.05e-07 5.99e-07   erg/cm2
Peak flux Cutoff-PL 1.00e+00 8.77e-01 4.91e-01 3.12e-01 2.53e+00 2.68e+00   ph/cm2/s
              Error 9.74e-02 6.78e-02 4.81e-02 1.52e-01 1.56e-01 2.79e-01   ph/cm2/s
 
Fluence        Band 4.71e-07 8.52e-07 1.03e-06 1.38e-06 2.94e-06 3.74e-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 8.97e-01 8.29e-01 4.49e-01 3.55e-01 2.34e+00 2.53e+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    1.701    0.099    -      -           1.21e-03 6.78e-05   72.120 57
CPL   1.310    0.395      85.9  253.0      1.91e-03 9.14e-04   68.950 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    1.807    0.108    -      -           1.84e-02 1.33e-03   53.110 57
CPL   1.616    0.313      87.4  -23.5      2.37e-02 1.19e-02   52.410 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: 188.736000 sec.
T50 in the 50-300 keV band: 98.240000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  272.440  -30.692  241.748
T90   219.076   -1.376  217.700
T50   106.504   77.320  183.824
Peak    1.000  240.292  241.292

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   10.9851 +61.9391 0.0136   27.7  -35.8       1.5826    14.1  TRIG_00355303       
------------------------------------------
 
Foreground time interval of the image:
-30.692  50.301 (delta_t =  80.993 [sec])
Background time interval of the image:
-239.000 -30.692 (delta_t = 208.308 [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  -30.692 sec. to  241.748 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70145     ( -0.0981391   0.0993784 )
Norm@50keV  : 1.20714E-03    ( -6.79706e-05   6.75781e-05 )
------------------------------------------------------------
# Chi-Squared =          72.12 using 59 PHA bins.
# Reduced chi-squared =          1.265 for     57 degrees of freedom 
# Null hypothesis probability =   8.555948e-02
 
Photon flux (15-150 keV)    in 272.4 sec: 0.160402 ( -0.00872463  0.00874086 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.04421e-06 ( -1.79932e-07  1.81146e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -30.692 sec. to  241.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31001     ( -0.412782   0.376811 )
Epeak [keV] : 85.9447      ( -22.5132 483.506 )
Norm@50keV  : 1.91199E-03    ( -0.000667867   0.00116034 )
------------------------------------------------------------
# Chi-Squared =          68.95 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     56 degrees of freedom 
# Null hypothesis probability =   1.145927e-01
 
Photon flux (15-150 keV)    in 272.4 sec: 0.156637 ( -0.009401  0.009408 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94369e-06 ( -2.04354e-07  2.05035e-07 ) ergs/cm2
 
Band function
Time interval is from  -30.692 sec. to  241.748 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.31000   ( -0.278852   0.48651 )
beta        : -10.00000    ( 1.05329e+15   1.05329e+15 )
Epeak [keV] : 85.9296      ( -22.5107 483.48 )
Norm@50keV   : 1.91174E-03    ( -0.000668626   0.00116039 )
------------------------------------------------------------
# Chi-Squared =          68.95 using 59 PHA bins.
# Reduced chi-squared =          1.254 for     55 degrees of freedom 
# Null hypothesis probability =   9.776144e-02
 
Photon flux (15-150 keV)    in 272.4 sec: 0.156641 ( -0.009405  0.009404 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94075e-06 ( -2.04109e-07  2.04654e-07 ) 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  240.292 sec. to  241.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80671     ( -0.10678   0.109539 )
Norm@50keV  : 1.84034E-02    ( -0.00133802   0.00132047 )
------------------------------------------------------------
# Chi-Squared =          53.11 using 59 PHA bins.
# Reduced chi-squared =         0.9317 for     57 degrees of freedom 
# Null hypothesis probability =   6.219187e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.54258 ( -0.153919  0.153923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69384e-07 ( -1.25005e-08  1.26203e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  240.292 sec. to  241.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61589     ( -0.424773   0.201379 )
Epeak [keV] : 87.3950      ( -40.3025 -87.3979 )
Norm@50keV  : 2.36618E-02    ( -0.00639049   0.0173746 )
------------------------------------------------------------
# Chi-Squared =          52.41 using 59 PHA bins.
# Reduced chi-squared =         0.9359 for     56 degrees of freedom 
# Null hypothesis probability =   6.115849e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.52905 ( -0.1563  0.15615 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.66257e-07 ( -1.413e-08  1.384e-08 ) ergs/cm2
 
Band function
Time interval is from  240.292 sec. to  241.292 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.05803   ( -10.3302   -2.61795 )
beta        : -1.90533    ( -0.144996   0.142868 )
Epeak [keV] : 23.0080      ( -7.26293 49.3951 )
Norm@50keV   : 136.991    ( -136.041   1901.55 )
------------------------------------------------------------
# Chi-Squared =          49.57 using 59 PHA bins.
# Reduced chi-squared =         0.9013 for     55 degrees of freedom 
# Null hypothesis probability =   6.813123e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.33637 ( -0.14318  0.14245 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5558e-07 ( -1.2613e-08  1.2475e-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:
Wed Jun  1 15:31:22 EDT 2011