batgrbproduct Analysis for Trigger=436981

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Oct 24 11:48:07 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger436981/GCN5_download_cron
======================================================================

  Trigger: 00436981      Segment: 000

  BAT Trigger Time: 309567018.688   [s; MET]
      Trigger Stop: 309567019.712   [s; MET]
               UTC: 2010-10-23T22:50:12.387740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 317.954259194012   Dec: -65.3938290160607  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.54
     Image Trigger?:     NO
     Rate S/N Ratio:     16.6733320005331  [ if not an image trigger ]
     Image S/N Ratio:    8.54

  Flight Position:   [ source = BAT ]
    RA: 317.954259194012   Dec: -65.3938290160607  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 317.949199394653   Dec: -65.3889080095459  [deg; J2000]  
        { 21h 11m 47.8s , -65d 23' 20.1" }
         +/- 1.38489406454034 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.625765552778392 [arcmin] (formal 1-sigma fit error)
    SNR: 19.1026989518477
 
  Angular difference between Flight and Ground position is 0.321186 arcmin
 
  Partial Coding Fraction: 0.1103516    [ including projection effects ]

  Duration
     T90: 80.6839999556541 +/- 2.0932845145742
        Measured from: 0.8960000872612
                   to: 81.5800000429153     [s; relative to TRIGTIME]
     T50: 14.9639999270439 +/- 1.09456839931268
        Measured from: 49.7040001153946
                   to: 64.6680000424385     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 57.3439999818802     
                   to: 58.3439999818802     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -10.9800000190735     
                   to: 137.255999982357     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    11.871965  16.093373  12.094901   2.767569
           0.143350   0.158866   0.153784   0.162649 [error]
 Peak      0.554149   0.967587   0.934883   0.278571
           0.011887   0.015078   0.015628   0.011579 [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 4.53e-06 7.51e-06 9.43e-06 2.36e-05 2.81e-05 4.51e-05   erg/cm2
              Error 1.63e-07 1.54e-07 1.90e-07 1.12e-06 4.76e-07 1.19e-06   erg/cm2
Peak flux Power-law 2.91e+01 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
 
Fluence   Cutoff-PL 4.05e-06 7.62e-06 9.74e-06 1.47e-05 2.73e-05 3.61e-05   erg/cm2
              Error 2.22e-07 1.62e-07 2.20e-07 2.33e-06 5.51e-07 2.40e-06   erg/cm2
Peak flux Cutoff-PL 5.94e+00 7.83e+00 6.62e+00 5.66e+00 2.32e+01 2.60e+01   ph/cm2/s
              Error 2.06e-01 1.57e-01 1.49e-01 6.87e-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    1.670    0.033    -      -           2.04e-02 3.43e-04   69.290 57
CPL   1.258    0.149     101.1   18.9      3.11e-02 4.62e-03   45.080 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    1.251    0.000    -      -           1.98e-01 0.00e+00  120.930 57
CPL   0.825    0.107     144.6   24.6      3.22e-01 3.85e-02   70.100 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: 74.944000 sec.
T50 in the 50-300 keV band: 9.536000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  148.236  -10.980  137.256
T90    80.684    0.896   81.580
T50    14.964   49.704   64.668
Peak    1.000   57.344   58.344

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  317.9492 -65.3889 0.0099   41.2 -113.0       5.7477    19.1  TRIG_00436981       
------------------------------------------
 
Foreground time interval of the image:
-10.980  11.913 (delta_t =  22.893 [sec])
Background time interval of the image:
-180.187 -10.980 (delta_t = 169.207 [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  -10.980 sec. to  137.256 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67031     ( -0.0329608   0.0329759 )
Norm@50keV  : 2.04126E-02    ( -0.000343227   0.000343216 )
------------------------------------------------------------
# Chi-Squared =          69.29 using 59 PHA bins.
# Reduced chi-squared =          1.216 for     57 degrees of freedom 
# Null hypothesis probability =   1.274372e-01
 
Photon flux (15-150 keV)    in 148.2 sec: 2.68350 ( -0.0549713  0.0552339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80802e-05 ( -4.76266e-07  4.76356e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -10.980 sec. to  137.256 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25774     ( -0.15087   0.146253 )
Epeak [keV] : 101.103      ( -12.9022 24.8473 )
Norm@50keV  : 3.10558E-02    ( -0.00420641   0.00503496 )
------------------------------------------------------------
# Chi-Squared =          45.08 using 59 PHA bins.
# Reduced chi-squared =         0.8049 for     56 degrees of freedom 
# Null hypothesis probability =   8.517848e-01
 
Photon flux (15-150 keV)    in 148.2 sec: 2.57706 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72944e-05 ( -5.52045e-07  5.4997e-07 ) ergs/cm2
 
Band function
Time interval is from  -10.980 sec. to  137.256 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.01642   ( -0.280756   0.411563 )
beta        : -1.88560    ( -0.421867   0.100894 )
Epeak [keV] : 75.2213      ( -17.4794 28.4618 )
Norm@50keV   : 4.19376E-02    ( -0.0118401   0.0301333 )
------------------------------------------------------------
# Chi-Squared =          42.29 using 59 PHA bins.
# Reduced chi-squared =         0.7689 for     55 degrees of freedom 
# Null hypothesis probability =   8.953593e-01
 
Photon flux (15-150 keV)    in 148.2 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   57.344 sec. to   58.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25080     (     )
Norm@50keV  : 0.197628    (     )
------------------------------------------------------------
# Chi-Squared =         120.93 using 59 PHA bins.
# Reduced chi-squared =         2.1216 for     57 degrees of freedom 
# Null hypothesis probability =   1.683702e-06
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   57.344 sec. to   58.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.824636     ( -0.108272   0.105673 )
Epeak [keV] : 144.625      ( -19.0406 30.0892 )
Norm@50keV  : 0.321820    ( -0.0357407   0.0412205 )
------------------------------------------------------------
# Chi-Squared =          70.10 using 59 PHA bins.
# Reduced chi-squared =          1.252 for     56 degrees of freedom 
# Null hypothesis probability =   9.736211e-02
 
Photon flux (15-150 keV)    in 1 sec: 23.1971 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.93987e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   57.344 sec. to   58.344 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.664788   ( -0.185053   0.230364 )
beta        : -1.54712    ( -0.293333   0.104472 )
Epeak [keV] : 108.607      ( -24.8368 38.1946 )
Norm@50keV   : 0.400870    ( -0.0854416   0.151674 )
------------------------------------------------------------
# Chi-Squared =          66.61 using 59 PHA bins.
# Reduced chi-squared =          1.211 for     55 degrees of freedom 
# Null hypothesis probability =   1.356233e-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:
Sun Oct 24 12:15:58 EDT 2010