batgrbproduct Analysis for Trigger=445033

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Feb  9 07:19:37 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger445033/GCN5_download_cron
======================================================================

  Trigger: 00445033      Segment: 000

  BAT Trigger Time: 318885454.384   [s; MET]
      Trigger Stop: 318885454.4   [s; MET]
               UTC: 2011-02-08T19:17:27.739380    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 280.305974394139   Dec: -4.9519952841751  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.97
     Image Trigger?:     NO
     Rate S/N Ratio:     25.8843582110896  [ if not an image trigger ]
     Image S/N Ratio:    7.97

  Flight Position:   [ source = BAT ]
    RA: 280.305974394139   Dec: -4.9519952841751  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 280.331938136863   Dec: -4.93884969086724  [deg; J2000]  
        { 18h 41m 19.7s , -04d 56' 19.9" }
         +/- 1.11261831025978 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.366112890286847 [arcmin] (formal 1-sigma fit error)
    SNR: 26.1161719184645
 
  Angular difference between Flight and Ground position is 1.740944 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 0.131999909877777 +/- 0.01442223432929
        Measured from: 0.00400012731552124
                   to: 0.136000037193298     [s; relative to TRIGTIME]
     T50: 0.0719999670982361 +/- 0.00565682356674367
        Measured from: 0.0440000891685486
                   to: 0.116000056266785     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.430000007152557     
                   to: 0.569999992847443     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00800001621246338     
                   to: 0.143999993801117     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.054831   0.078593   0.029847   0.002259
           0.003661   0.003932   0.002859   0.001589 [error]
 Peak      0.049851   0.075690   0.035879   0.000557
           0.006270   0.006234   0.005004   0.004056 [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 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 Power-law 5.36e-01 4.50e-01 2.57e-01 2.18e-01 1.34e+00 1.46e+00   ph/cm2/s
              Error 8.29e-02 4.81e-02 3.94e-02 6.30e-02 1.43e-01 1.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.51e-08 3.26e-08 2.37e-08 3.73e-09 7.48e-08 7.52e-08   erg/cm2
              Error 1.98e-09 2.56e-09 3.27e-09 2.28e-09 5.78e-09 6.06e-09   erg/cm2
Peak flux Cutoff-PL 4.38e-01 5.47e-01 2.58e-01 1.28e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 9.63e-02 6.93e-02 5.12e-02 1.49e-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 4.43e-01 1.28e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 1.45e-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    2.090    0.000    -      -           5.62e-02 0.00e+00  114.870 57
CPL  -0.255    0.655      42.2    3.2      1.16e+00 1.18e+00   54.440 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    1.807    0.175    -      -           9.70e-03 1.16e-03   59.850 57
CPL  -0.013    1.047      47.6    8.3      1.02e-01 2.23e-01   46.100 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.152   -0.008    0.144
T90     0.132    0.004    0.136
T50     0.072    0.044    0.116
Peak    1.000   -0.430    0.570

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  280.3319  -4.9388 0.0074   15.7  -34.6       0.1750    26.1  TRIG_00445033       
------------------------------------------
 
Foreground time interval of the image:
 -0.008   0.144 (delta_t =   0.152 [sec])
Background time interval of the image:
-239.384  -0.008 (delta_t = 239.376 [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   -0.008 sec. to    0.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.08958     (     )
Norm@50keV  : 5.62070E-02    (     )
------------------------------------------------------------
# Chi-Squared =         114.87 using 59 PHA bins.
# Reduced chi-squared =         2.0153 for     57 degrees of freedom 
# Null hypothesis probability =   8.824564e-06
 
Photon flux (15-150 keV)    in 0.152 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.008 sec. to    0.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.255048     ( -0.701717   0.60905 )
Epeak [keV] : 42.1741      ( -3.08357 3.28257 )
Norm@50keV  : 1.15902    ( -0.628668   1.7262 )
------------------------------------------------------------
# Chi-Squared =          54.44 using 59 PHA bins.
# Reduced chi-squared =         0.9722 for     56 degrees of freedom 
# Null hypothesis probability =   5.339307e-01
 
Photon flux (15-150 keV)    in 0.152 sec: 8.57703 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.4825e-08 ( -5.72797e-09  5.83072e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.008 sec. to    0.144 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.255443   ( -0.480975   0.855306 )
beta        : -9.99998    ( 132621   132631 )
Epeak [keV] : 42.1426      ( -3.0616 3.3038 )
Norm@50keV   : 1.16117    ( -0.630657   1.72168 )
------------------------------------------------------------
# Chi-Squared =          54.45 using 59 PHA bins.
# Reduced chi-squared =         0.9899 for     55 degrees of freedom 
# Null hypothesis probability =   4.957792e-01
 
Photon flux (15-150 keV)    in 0.152 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   -0.430 sec. to    0.570 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.80718     ( -0.171981   0.177972 )
Norm@50keV  : 9.69694E-03    ( -0.00117141   0.001157 )
------------------------------------------------------------
# Chi-Squared =          59.85 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     57 degrees of freedom 
# Null hypothesis probability =   3.726156e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33996 ( -0.143355  0.143437 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.92466e-08 ( -1.08607e-08  1.10261e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.430 sec. to    0.570 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.30443E-02     ( -1.17195   0.921215 )
Epeak [keV] : 47.6008      ( -6.47275 10.2029 )
Norm@50keV  : 0.102492    ( -0.0709823   0.374991 )
------------------------------------------------------------
# Chi-Squared =          46.10 using 59 PHA bins.
# Reduced chi-squared =         0.8233 for     56 degrees of freedom 
# Null hypothesis probability =   8.245402e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.430 sec. to    0.570 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.33446E-02   ( -0.785056   1.31222 )
beta        : -10.00000    ( 3.21155e+06   3.21156e+06 )
Epeak [keV] : 47.5916      ( -6.47231 10.1999 )
Norm@50keV   : 0.102545    ( -0.0710318   0.373394 )
------------------------------------------------------------
# Chi-Squared =          46.10 using 59 PHA bins.
# Reduced chi-squared =         0.8382 for     55 degrees of freedom 
# Null hypothesis probability =   7.979959e-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 Feb  9 07:34:31 EST 2011