batgrbproduct Analysis for Trigger=437466

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Oct 31 09:19:49 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger437466/GCN5_download_cron
======================================================================

  Trigger: 00437466      Segment: 000

  BAT Trigger Time: 310211528   [s; MET]
      Trigger Stop: 310212656   [s; MET]
               UTC: 2010-10-31T09:52:01.676240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 267.005249515318   Dec: -24.7751627070805  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    9.01
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.01

  Flight Position:   [ source = BAT ]
    RA: 267.005249515318   Dec: -24.7751627070805  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 266.977390242438   Dec: -24.8175092280726  [deg; J2000]  
        { 17h 47m 54.6s , -24d 49' 03.0" }
         +/- 3.34279816147041 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.42174609642258 [arcmin] (formal 1-sigma fit error)
    SNR: 5.42487315169374
 
  Angular difference between Flight and Ground position is 2.959436 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 1128 +/- 
        Measured from: 0
                   to: 1128     [s; relative to TRIGTIME]
     T50: 1128 +/- 
        Measured from: 0
                   to: 1128     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1128 second)
        Measured from: 0     
                   to: 1128     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1128     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.694326   0.391677   0.085437  -0.063401
           0.162031   0.145710   0.123714   0.110895 [error]
 Peak      1.694326   0.391677   0.085437  -0.063401
           0.162031   0.145710   0.123714   0.110895 [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 4.54e-07 1.51e-07 2.83e-08 6.21e-09 6.37e-07 6.40e-07   erg/cm2
              Error 8.30e-08 7.28e-08 3.16e-08 1.44e-08 1.51e-07 1.55e-07   erg/cm2
Peak flux Power-law 2.44e-02 4.41e-03 3.82e-04 3.58e-05 2.93e-02 2.93e-02   ph/cm2/s
              Error 3.43e-03 1.96e-03 4.38e-04 6.71e-05 5.04e-03 5.05e-03   ph/cm2/s
 
Fluence   Cutoff-PL 4.54e-07 1.51e-07 2.83e-08 6.16e-09 6.37e-07 6.39e-07   erg/cm2
              Error 8.30e-08 7.29e-08 3.15e-08 1.43e-08 1.51e-07 1.55e-07   erg/cm2
Peak flux Cutoff-PL 2.44e-02 4.40e-03 3.81e-04 3.55e-05 2.92e-02 2.92e-02   ph/cm2/s
              Error 3.43e-03 1.96e-03 4.37e-04 5.05e-03 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    4.429    0.868    -      -           3.21e-05 3.35e-05   67.210 57
CPL   1.000    0.000      50.0    0.0      4.19e-04 0.00e+00  113.590 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    4.528    0.743    -      -           2.95e-05 2.92e-05   68.230 57
CPL   1.000    0.000      50.0    0.0      5.22e-04 0.00e+00  154.320 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 1128.000    0.000 1128.000
T90  1128.000    0.000 1128.000
T50  1128.000    0.000 1128.000
Peak 1128.000    0.000 1128.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  266.9774 -24.8175 0.0355    4.2   14.0       2.6533     5.4  TRIG_00437466       
------------------------------------------
 
Foreground time interval of the image:
  0.000 359.970 (delta_t = 359.970 [sec])
361.000 648.410 (delta_t = 287.410 [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
Multiple GTIs in the spectrum
tstart tstop
0.000000 359.970000
361.000000 648.410000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.42918     ( -0.779056   0.957113 )
Norm@50keV  : 3.21110E-05    ( -3.2133e-05   3.48758e-05 )
------------------------------------------------------------
# Chi-Squared =          67.21 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     57 degrees of freedom 
# Null hypothesis probability =   1.669082e-01
 
Photon flux (15-150 keV)    in 647.4 sec: 2.90834E-02 ( -0.00549809  0.0055302 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.37427e-07 ( -1.43502e-07  1.58023e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 359.970000
361.000000 648.410000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 4.18535E-04    (     )
------------------------------------------------------------
# Chi-Squared =         113.59 using 59 PHA bins.
# Reduced chi-squared =         2.0284 for     56 degrees of freedom 
# Null hypothesis probability =   8.551198e-06
 
Photon flux (15-150 keV)    in 647.4 sec: 2.90619E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.37268e-07 ( -1.43527e-07  1.5803e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 359.970000
361.000000 648.410000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.13517   ( 5.24852   5.24852 )
beta        : -4.41722    ( -0.967412   0.76746 )
Epeak [keV] : 43.4292      ( -43.4292 -43.4292 )
Norm@50keV   : 4.41557E-03    ( -0.00441557   0.00469027 )
------------------------------------------------------------
# Chi-Squared =          67.21 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     55 degrees of freedom 
# Null hypothesis probability =   1.249568e-01
 
Photon flux (15-150 keV)    in 647.4 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  361.000 sec. to  648.410 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.52814     ( -0.655721   0.83127 )
Norm@50keV  : 2.95226E-05    ( -2.95226e-05   2.89693e-05 )
------------------------------------------------------------
# Chi-Squared =          68.23 using 59 PHA bins.
# Reduced chi-squared =          1.197 for     57 degrees of freedom 
# Null hypothesis probability =   1.465497e-01
 
Photon flux (15-150 keV)    in 647.4 sec: 2.92578E-02 ( -0.00503057  0.00504448 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.33509e-07 ( -1.36899e-07  1.52526e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  361.000 sec. to  648.410 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 5.21753E-04    (     )
------------------------------------------------------------
# Chi-Squared =         154.32 using 59 PHA bins.
# Reduced chi-squared =         2.7557 for     56 degrees of freedom 
# Null hypothesis probability =   3.935222e-11
 
Photon flux (15-150 keV)    in 647.4 sec: 2.92355E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.33335e-07 ( -1.36937e-07  1.52538e-07 ) ergs/cm2
 
Band function
Time interval is from  361.000 sec. to  648.410 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.37281   ( 2.37281   2.37281 )
beta        : -4.52814    ( -0.830699   0.65571 )
Epeak [keV] : 3.39663      ( -3.39663 -3.39663 )
Norm@50keV   : 0.223466    ( -0.223466   2.17612 )
------------------------------------------------------------
# Chi-Squared =          68.23 using 59 PHA bins.
# Reduced chi-squared =          1.241 for     55 degrees of freedom 
# Null hypothesis probability =   1.084116e-01
 
Photon flux (15-150 keV)    in 647.4 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:
Sun Oct 31 09:42:05 EDT 2010