batgrbproduct Analysis for Trigger=344858

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.42
    Process Start Time (local time): Thu Mar 26 18:28:28 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger344858/SDC
======================================================================

  Trigger: 00344858      Segment: 000

  BAT Trigger Time: 257728602.688   [s; MET]
      Trigger Stop: 257728603.712   [s; MET]
               UTC: 2009-03-02T23:16:38.145360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 101.765061357004   Dec: -62.9244405638904  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.52
     Image Trigger?:     NO
     Rate S/N Ratio:     19.0787840283389  [ if not an image trigger ]
     Image S/N Ratio:    5.52

  Flight Position:   [ source = BAT ]
    RA: 101.765061357004   Dec: -62.9244405638904  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 101.652512023973   Dec: -62.9880114653987  [deg; J2000]  
        { 06h 46m 36.6s , -62d 59' 16.8" }
         +/- 3.95799994565871 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.75033572939585 [arcmin] (formal 1-sigma fit error)
    SNR: 4.26168696155403
 
  Angular difference between Flight and Ground position is 4.896501 arcmin
 
  Partial Coding Fraction: 0.8828125    [ including projection effects ]

  Duration
     T90: 1.02400001883507 +/- 
        Measured from: 0
                   to: 1.02400001883507     [s; relative to TRIGTIME]
     T50: 1.02400001883507 +/- 
        Measured from: 0
                   to: 1.02400001883507     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02400001883507 second)
        Measured from: -1.49011611938477e-08     
                   to: 1.02400000393391     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02400001883507     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.004684   0.002945   0.013922   0.034512
           0.006494   0.007061   0.007485   0.008718 [error]
 Peak      0.004684   0.002945   0.013922   0.034512
           0.006494   0.007061   0.007485   0.008718 [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 1.23e-10 1.04e-09 7.85e-09 3.41e-07 2.95e-08 3.50e-07   erg/cm2
              Error 8.99e-10 2.37e-09 7.64e-09 4.41e-07 2.51e-08 4.46e-07   erg/cm2
Peak flux Power-law 3.67e-03 1.63e-02 6.17e-02 8.43e-01 1.80e-01 9.24e-01   ph/cm2/s
              Error 2.80e-02 3.96e-02 6.18e-02 1.03e+00 1.67e-01 1.07e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.24e-10 1.05e-09 7.92e-09 3.38e-07 2.97e-08 3.18e-07   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 Cutoff-PL 6.29e-06 1.47e-03 6.36e-02 8.39e-01 1.89e-01 7.61e-01   ph/cm2/s
              Error 2.18e-02 7.62e-03 7.24e-02 1.25e-01 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 2.10e-11 5.20e-10 8.87e-09 8.11e-08 3.25e-08 2.04e-07   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 8.67e-04 7.22e-03 6.63e-02 2.95e-01 1.87e-01 5.28e-01   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   -0.918    0.640    -      -           8.52e-04 1.32e-03   66.470 57
CPL  -7.032    0.000     160.2    0.0      4.71e-03 3.28e-02   65.970 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   -0.918    0.640    -      -           8.52e-04 1.32e-03   66.470 57
CPL  -7.032    0.000     160.2    0.0      4.71e-03 3.28e-02   65.970 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    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024   -0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  101.6525 -62.9880 0.0454   17.5   37.0       0.0656     4.3  TRIG_00344858       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-21.787 -10.688 (delta_t =  11.099 [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    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.917580     ( 0.917723   2.19804 )
Norm@50keV  : 8.51976E-04    ( -0.000851902   0.00178131 )
------------------------------------------------------------
# Chi-Squared =          66.47 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     57 degrees of freedom 
# Null hypothesis probability =   1.830807e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.180410 ( -0.18041  0.152813 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94999e-08 ( -2.94999e-08  2.07587e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -7.03244     (     )
Epeak [keV] : 160.209      ( -158.643 -158.643 )
Norm@50keV  : 4.70504E-03    ( -0.00519458   0.0604001 )
------------------------------------------------------------
# Chi-Squared =          65.97 using 59 PHA bins.
# Reduced chi-squared =          1.178 for     56 degrees of freedom 
# Null hypothesis probability =   1.701092e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.189073 ( -0.125271  0.12531 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9671e-08 ( 2.07905e-08  -2.9671e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.518336   ( 0.518022   0.518022 )
beta        : 0.917168    ( -2.19668   -0.917691 )
Epeak [keV] : 10.6326      ( -10.6319 -10.6319 )
Norm@50keV   : 1.68984E-03    ( -0.00168954   100565 )
------------------------------------------------------------
# Chi-Squared =          66.47 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     55 degrees of freedom 
# Null hypothesis probability =   1.382559e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.186914 ( -0.133908  0.129434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24771e-08 ( -3.24771e-08  2.21203e-08 ) 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    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.917580     ( 0.917723   2.19804 )
Norm@50keV  : 8.51976E-04    ( -0.000851902   0.00178131 )
------------------------------------------------------------
# Chi-Squared =          66.47 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     57 degrees of freedom 
# Null hypothesis probability =   1.830807e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.180410 ( -0.18041  0.152813 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94999e-08 ( -2.94999e-08  2.07587e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -7.03244     (     )
Epeak [keV] : 160.209      ( -158.643 -158.643 )
Norm@50keV  : 4.70504E-03    ( -0.00519458   0.0604001 )
------------------------------------------------------------
# Chi-Squared =          65.97 using 59 PHA bins.
# Reduced chi-squared =          1.178 for     56 degrees of freedom 
# Null hypothesis probability =   1.701092e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.189073 ( -0.125271  0.12531 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9671e-08 ( 2.07905e-08  -2.9671e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.518336   ( 0.518022   0.518022 )
beta        : 0.917168    ( -2.19668   -0.917691 )
Epeak [keV] : 10.6326      ( -10.6319 -10.6319 )
Norm@50keV   : 1.68984E-03    ( -0.00168954   100565 )
------------------------------------------------------------
# Chi-Squared =          66.47 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     55 degrees of freedom 
# Null hypothesis probability =   1.382559e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.186914 ( -0.133908  0.129434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.24771e-08 ( -3.24771e-08  2.21203e-08 ) 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:
Fri Jun  3 11:19:12 EDT 2011