batgrbproduct Analysis for Trigger=430172

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jul 28 17:35:39 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger430172/GCN5_download_cron
======================================================================

  Trigger: 00430172      Segment: 000

  BAT Trigger Time: 302005921.856   [s; MET]
      Trigger Stop: 302005922.88   [s; MET]
               UTC: 2010-07-28T10:31:55.829200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 44.0530055621985   Dec: 0.27954807728338  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.07
     Image Trigger?:     NO
     Rate S/N Ratio:     22.4499443206436  [ if not an image trigger ]
     Image S/N Ratio:    9.07

  Flight Position:   [ source = BAT ]
    RA: 44.0530055621985   Dec: 0.27954807728338  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 44.050814243629   Dec: 0.29608770173254  [deg; J2000]  
        { 02h 56m 12.2s , +00d 17' 45.9" }
         +/- 1.48502532565046 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.375234288014755 [arcmin] (formal 1-sigma fit error)
    SNR: 17.2895740494486
 
  Angular difference between Flight and Ground position is 1.001049 arcmin
 
  Partial Coding Fraction: 0.1132812    [ including projection effects ]

  Duration
     T90: 12.0800000429153 +/- 2.41053683809571
        Measured from: -1.27999991178513
                   to: 10.8000001311302     [s; relative to TRIGTIME]
     T50: 3.56800001859665 +/- 1.33110479867153
        Measured from: 0.208000123500824
                   to: 3.77600014209747     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.180000007152557     
                   to: 1.18000000715256     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.74400001764297     
                   to: 13.1999999880791     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.555935   0.928332   0.753013   0.231605
           0.063194   0.068292   0.060194   0.049578 [error]
 Peak      0.101200   0.147093   0.134596   0.028238
           0.018158   0.021011   0.019340   0.015008 [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 2.36e-07 4.22e-07 5.79e-07 1.64e-06 1.67e-06 2.88e-06   erg/cm2
              Error 3.42e-08 3.71e-08 5.92e-08 3.63e-07 1.45e-07 4.05e-07   erg/cm2
Peak flux Power-law 1.16e+00 1.16e+00 8.16e-01 9.10e-01 3.49e+00 4.04e+00   ph/cm2/s
              Error 2.81e-01 1.85e-01 1.48e-01 3.18e-01 5.35e-01 6.09e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.27e-07 4.31e-07 5.90e-07 1.24e-06 1.65e-06 2.49e-06   erg/cm2
              Error 4.12e-08 4.31e-08 5.84e-08 6.88e-07 1.52e-07 7.04e-07   erg/cm2
Peak flux Cutoff-PL 8.74e-01 1.31e+00 9.53e-01 3.18e-01 3.37e+00 3.45e+00   ph/cm2/s
              Error 3.45e-01 2.33e-01 1.93e-01 6.07e-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 1.05e+00 1.30e+00 3.62e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 3.18e-01 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    1.546    0.141    -      -           1.19e-02 9.68e-04   53.260 57
CPL   1.341    0.461     171.1    0.0      1.49e-02 1.42e-02   52.850 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    1.508    0.231    -      -           2.79e-02 4.24e-03   65.360 57
CPL   0.100    1.249      71.2   38.2      1.35e-01 3.03e-01   60.210 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: 12.992000 sec.
T50 in the 50-300 keV band: 5.504000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   14.944   -1.744   13.200
T90    12.080   -1.280   10.800
T50     3.568    0.208    3.776
Peak    1.000    0.180    1.180

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   44.0508  +0.2961 0.0111   46.9  146.3       2.5594    17.3  TRIG_00430172       
------------------------------------------
 
Foreground time interval of the image:
 -1.744  13.200 (delta_t =  14.944 [sec])
Background time interval of the image:
-239.856 -57.336 (delta_t = 182.520 [sec])
-55.856  -1.744 (delta_t =  54.112 [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   -1.744 sec. to   13.200 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54560     ( -0.140504   0.141449 )
Norm@50keV  : 1.18709E-02    ( -0.000969931   0.000966836 )
------------------------------------------------------------
# Chi-Squared =          53.26 using 59 PHA bins.
# Reduced chi-squared =         0.9343 for     57 degrees of freedom 
# Null hypothesis probability =   6.163220e-01
 
Photon flux (15-150 keV)    in 14.94 sec: 1.50088 ( -0.128357  0.128739 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.67067e-06 ( -1.44671e-07  1.45179e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.744 sec. to   13.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34127     ( -0.594418   0.32707 )
Epeak [keV] : 171.107      ( -171.107 -171.107 )
Norm@50keV  : 1.49073E-02    ( -0.0149073   0.0134704 )
------------------------------------------------------------
# Chi-Squared =          52.85 using 59 PHA bins.
# Reduced chi-squared =         0.9437 for     56 degrees of freedom 
# Null hypothesis probability =   5.950491e-01
 
Photon flux (15-150 keV)    in 14.94 sec: 1.48667 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6546e-06 ( -1.52762e-07  1.51925e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.744 sec. to   13.200 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.21475   ( 1.22788   3.90491 )
beta        : -1.67547    ( 1.67242   0.256378 )
Epeak [keV] : 110.765      ( -118.988 738.651 )
Norm@50keV   : 1.76622E-02    ( -0.00544361   0.19803 )
------------------------------------------------------------
# Chi-Squared =          52.86 using 59 PHA bins.
# Reduced chi-squared =         0.9611 for     55 degrees of freedom 
# Null hypothesis probability =   5.569110e-01
 
Photon flux (15-150 keV)    in 14.94 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    0.180 sec. to    1.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50833     ( -0.229034   0.233866 )
Norm@50keV  : 2.79209E-02    ( -0.00425161   0.00423379 )
------------------------------------------------------------
# Chi-Squared =          65.36 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     57 degrees of freedom 
# Null hypothesis probability =   2.092241e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.49347 ( -0.534812  0.535906 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.64518e-07 ( -4.28475e-08  4.31357e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.180 sec. to    1.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.100141     ( -1.41486   1.08391 )
Epeak [keV] : 71.1973      ( -14.6859 61.7139 )
Norm@50keV  : 0.135182    ( -0.135182   0.470522 )
------------------------------------------------------------
# Chi-Squared =          60.21 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     56 degrees of freedom 
# Null hypothesis probability =   3.261699e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.37363 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.54492e-07 ( -4.3406e-08  4.4124e-08 ) ergs/cm2
 
Band function
Time interval is from    0.180 sec. to    1.180 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.88673E-02   ( -0.746482   1.99486 )
beta        : -10.00000    ( 4.23857e+11   4.23857e+11 )
Epeak [keV] : 71.1538      ( -14.6552 61.7392 )
Norm@50keV   : 0.135419    ( -0.135419   0.470956 )
------------------------------------------------------------
# Chi-Squared =          60.21 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     55 degrees of freedom 
# Null hypothesis probability =   2.930030e-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:
Wed Jul 28 18:15:01 EDT 2010