batgrbproduct Analysis for Trigger=433273

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Sep  4 18:51:31 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger433273/GCN5_download_cron
======================================================================

  Trigger: 00433273      Segment: 000

  BAT Trigger Time: 305256829.952   [s; MET]
      Trigger Stop: 305256832   [s; MET]
               UTC: 2010-09-04T01:33:43.808300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 172.918812328497   Dec: -16.208937006196  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.27
     Image Trigger?:     NO
     Rate S/N Ratio:     12.2474487139159  [ if not an image trigger ]
     Image S/N Ratio:    8.27

  Flight Position:   [ source = BAT ]
    RA: 172.918812328497   Dec: -16.208937006196  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 172.901244022131   Dec: -16.1940793211845  [deg; J2000]  
        { 11h 31m 36.3s , -16d 11' 38.7" }
         +/- 1.54286027831568 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.597476402385541 [arcmin] (formal 1-sigma fit error)
    SNR: 16.3711950477571
 
  Angular difference between Flight and Ground position is 1.348824 arcmin
 
  Partial Coding Fraction: 0.3085938    [ including projection effects ]

  Duration
     T90: 31.2999999523163 +/- 5.6391038511336
        Measured from: -13.5919998884201
                   to: 17.7080000638962     [s; relative to TRIGTIME]
     T50: 11.5719999074936 +/- 3.93725031528039
        Measured from: -7.85599988698959
                   to: 3.716000020504     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.28799998760223     
                   to: 3.28799998760223     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.4800000190735     
                   to: 23.0239999890327     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.616063   0.750710   0.544148   0.147154
           0.057692   0.060629   0.055512   0.052407 [error]
 Peak      0.052570   0.069260   0.066491   0.005548
           0.010418   0.010578   0.009583   0.008489 [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 2.00e-07 3.33e-07 4.21e-07 1.06e-06 1.25e-06 2.01e-06   erg/cm2
              Error 2.86e-08 2.98e-08 5.52e-08 2.92e-07 1.29e-07 3.40e-07   erg/cm2
Peak flux Power-law 5.42e-01 5.41e-01 3.79e-01 4.20e-01 1.63e+00 1.88e+00   ph/cm2/s
              Error 1.36e-01 8.93e-02 7.53e-02 1.63e-01 2.60e-01 3.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.98e-07 3.38e-07 4.22e-07 8.79e-07 1.24e-06 1.84e-06   erg/cm2
              Error 3.16e-08 3.54e-08 5.65e-08 5.27e-07 1.42e-07 4.21e-07   erg/cm2
Peak flux Cutoff-PL 4.40e-01 6.21e-01 4.12e-01 1.19e-01 1.56e+00 1.59e+00   ph/cm2/s
              Error 1.60e-01 1.16e-01 9.19e-02 3.01e-01 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   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 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+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    1.664    0.162    -      -           3.59e-03 3.47e-04   53.190 57
CPL   1.557    0.588     195.3    0.0      4.09e-03 0.00e+00   53.090 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    1.514    0.251    -      -           1.30e-02 2.11e-03   65.430 57
CPL   0.156    1.286      65.0   45.5      6.68e-02 1.79e-01   60.960 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: 18.496000 sec.
T50 in the 50-300 keV band: 13.440000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   37.504  -14.480   23.024
T90    31.300  -13.592   17.708
T50    11.572   -7.856    3.716
Peak    1.000    2.288    3.288

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  172.9012 -16.1941 0.0117   35.2 -111.9       2.1641    16.4  TRIG_00433273       
------------------------------------------
 
Foreground time interval of the image:
-14.480  23.024 (delta_t =  37.504 [sec])
Background time interval of the image:
-188.751 -91.202 (delta_t =  97.549 [sec])
-89.952 -14.480 (delta_t =  75.472 [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  -14.480 sec. to   23.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66387     ( -0.160533   0.163795 )
Norm@50keV  : 3.58783E-03    ( -0.000348893   0.000344279 )
------------------------------------------------------------
# Chi-Squared =          53.19 using 59 PHA bins.
# Reduced chi-squared =         0.9332 for     57 degrees of freedom 
# Null hypothesis probability =   6.186713e-01
 
Photon flux (15-150 keV)    in 37.5 sec: 0.470648 ( -0.0420531  0.0420987 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24962e-06 ( -1.28682e-07  1.3031e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -14.480 sec. to   23.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.55735     ( -0.614822   0.561327 )
Epeak [keV] : 195.341      ( -195.341 -195.341 )
Norm@50keV  : 4.08965E-03    (     )
------------------------------------------------------------
# Chi-Squared =          53.09 using 59 PHA bins.
# Reduced chi-squared =         0.9480 for     56 degrees of freedom 
# Null hypothesis probability =   5.858040e-01
 
Photon flux (15-150 keV)    in 37.5 sec: 0.468350 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23768e-06 ( -1.44364e-07  1.39485e-07 ) ergs/cm2
 
Band function
Time interval is from  -14.480 sec. to   23.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.58502   ( -6.52962   -6.52962 )
beta        : -1.72662    ( -0.21181   0.188828 )
Epeak [keV] : 22.7845      ( -22.6299 4.52396 )
Norm@50keV   : 371.108    ( -391.973   4260.08 )
------------------------------------------------------------
# Chi-Squared =          51.87 using 59 PHA bins.
# Reduced chi-squared =         0.9432 for     55 degrees of freedom 
# Null hypothesis probability =   5.948215e-01
 
Photon flux (15-150 keV)    in 37.5 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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    2.288 sec. to    3.288 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51423     ( -0.249394   0.252814 )
Norm@50keV  : 1.29862E-02    ( -0.00212109   0.00210576 )
------------------------------------------------------------
# Chi-Squared =          65.43 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.074971e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.62744 ( -0.259501  0.259905 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22918e-07 ( -2.15268e-08  2.1852e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.288 sec. to    3.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.155786     ( -1.45324   1.11944 )
Epeak [keV] : 65.0007      ( -14.5029 76.5054 )
Norm@50keV  : 6.67883E-02    ( -0.0667883   0.290959 )
------------------------------------------------------------
# Chi-Squared =          60.96 using 59 PHA bins.
# Reduced chi-squared =          1.089 for     56 degrees of freedom 
# Null hypothesis probability =   3.021030e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.56431 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12445e-07 ( -2.19101e-08  2.3185e-08 ) ergs/cm2
 
Band function
Time interval is from    2.288 sec. to    3.288 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99609   ( -500.178   -485.221 )
beta        : -1.79237    ( -0.436289   0.347325 )
Epeak [keV] : 29.5014      ( -7.21924 6.17196 )
Norm@50keV   : 547.698    ( -389.766   2435.01 )
------------------------------------------------------------
# Chi-Squared =          60.26 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     55 degrees of freedom 
# Null hypothesis probability =   2.913777e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) 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:
Sat Sep  4 19:06:21 EDT 2010