batgrbproduct Analysis for Trigger=450161

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Mar 29 04:50:59 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger450161/GCN5_download_cron
======================================================================

  Trigger: 00450161      Segment: 000

  BAT Trigger Time: 323012448   [s; MET]
      Trigger Stop: 323012512   [s; MET]
               UTC: 2011-03-28T13:40:41.200500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.202695413514   Dec: 57.5802279948333  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.57
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.57

  Flight Position:   [ source = BAT ]
    RA: 251.202695413514   Dec: 57.5802279948333  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.276393727544   Dec: 57.6133727432547  [deg; J2000]  
        { 16h 45m 06.3s , +57d 36' 48.1" }
         +/- 2.72156718031058 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.45941756305707 [arcmin] (formal 1-sigma fit error)
    SNR: 7.27693164702849
 
  Angular difference between Flight and Ground position is 3.093506 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 64 +/- 22.6274169979695
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 16
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.197938   0.171948   0.203443   0.041361
           0.039743   0.041631   0.038814   0.037537 [error]
 Peak      0.197938   0.171948   0.203443   0.041361
           0.039743   0.041631   0.038814   0.037537 [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 4.18e-08 8.64e-08 1.39e-07 5.04e-07 3.86e-07 7.72e-07   erg/cm2
              Error 1.44e-08 1.82e-08 3.67e-08 2.95e-07 9.08e-08 3.22e-07   erg/cm2
Peak flux Power-law 2.10e-02 2.36e-02 1.91e-02 2.56e-02 7.31e-02 8.93e-02   ph/cm2/s
              Error 7.37e-03 5.10e-03 4.86e-03 1.38e-02 1.46e-02 1.93e-02   ph/cm2/s
 
Fluence   Cutoff-PL 3.83e-08 8.98e-08 1.45e-07 2.77e-07 3.75e-07 5.52e-07   erg/cm2
              Error 1.77e-08 2.11e-08 4.10e-08 4.12e-07 9.57e-08 4.02e-07   erg/cm2
Peak flux Cutoff-PL 1.91e-02 2.44e-02 1.99e-02 1.62e-02 7.16e-02 7.96e-02   ph/cm2/s
              Error 9.08e-03 5.77e-03 5.58e-03 2.45e-02 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 8.12e-02 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    1.309    0.358    -      -           6.12e-04 1.24e-04   33.890 57
CPL   0.828    1.630     129.2    0.0      1.04e-03 0.00e+00   33.560 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    1.309    0.358    -      -           6.12e-04 1.24e-04   33.890 57
CPL   0.828    1.630     129.2    0.0      1.04e-03 0.00e+00   33.560 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  251.2764 +57.6134 0.0264    0.0 -109.1       0.5877     7.3  TRIG_00450161       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

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   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30923     ( -0.355544   0.360126 )
Norm@50keV  : 6.11772E-04    ( -0.000125027   0.00012383 )
------------------------------------------------------------
# Chi-Squared =          33.89 using 59 PHA bins.
# Reduced chi-squared =         0.5946 for     57 degrees of freedom 
# Null hypothesis probability =   9.936085e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.31117E-02 ( -0.0146124  0.0146295 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8604e-07 ( -8.95731e-08  9.19578e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.828373     ( -1.65555   1.60353 )
Epeak [keV] : 129.157      ( -129.388 -129.388 )
Norm@50keV  : 1.04047E-03    (     )
------------------------------------------------------------
# Chi-Squared =          33.56 using 59 PHA bins.
# Reduced chi-squared =         0.5993 for     56 degrees of freedom 
# Null hypothesis probability =   9.924780e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.16462E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.7535e-07 ( -9.4217e-08  9.70957e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38547   ( 0.890765   1.64981 )
beta        : 10.00000    ( -1.97895e+15   -1.97895e+15 )
Epeak [keV] : 4.40860      ( -4.4086 -4.4086 )
Norm@50keV   : 3.67135E-20    ( -3.67135e-20   7.7715e-21 )
------------------------------------------------------------
# Chi-Squared =          42.12 using 59 PHA bins.
# Reduced chi-squared =         0.7659 for     55 degrees of freedom 
# Null hypothesis probability =   8.987252e-01
 
Photon flux (15-150 keV)    in 64 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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30923     ( -0.355544   0.360126 )
Norm@50keV  : 6.11772E-04    ( -0.000125027   0.00012383 )
------------------------------------------------------------
# Chi-Squared =          33.89 using 59 PHA bins.
# Reduced chi-squared =         0.5946 for     57 degrees of freedom 
# Null hypothesis probability =   9.936085e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.31117E-02 ( -0.0146124  0.0146295 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8604e-07 ( -8.95731e-08  9.19578e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.828373     ( -1.65555   1.60374 )
Epeak [keV] : 129.157      ( -129.388 -129.388 )
Norm@50keV  : 1.04047E-03    (     )
------------------------------------------------------------
# Chi-Squared =          33.56 using 59 PHA bins.
# Reduced chi-squared =         0.5993 for     56 degrees of freedom 
# Null hypothesis probability =   9.924780e-01
 
Photon flux (15-150 keV)    in 64 sec: 7.16462E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.7535e-07 ( -9.4217e-08  9.70368e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38547   ( 0.890765   1.64981 )
beta        : 10.00000    ( -1.97895e+15   -1.97895e+15 )
Epeak [keV] : 4.40860      ( -4.4086 -4.4086 )
Norm@50keV   : 3.67135E-20    ( -3.67135e-20   7.7715e-21 )
------------------------------------------------------------
# Chi-Squared =          42.12 using 59 PHA bins.
# Reduced chi-squared =         0.7659 for     55 degrees of freedom 
# Null hypothesis probability =   8.987252e-01
 
Photon flux (15-150 keV)    in 64 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:
Tue Mar 29 05:06:41 EDT 2011