batgrbproduct Analysis for Trigger=348152

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Aug 10 17:13:29 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/348152
======================================================================

  Trigger: 00348152      Segment: 000

  BAT Trigger Time: 260267729.488   [s; MET]
      Trigger Stop: 260267729.552   [s; MET]
               UTC: 2009-04-01T08:35:24.865740    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 95.1007140995549   Dec: -8.96344268717607  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.13
     Image Trigger?:     NO
     Rate S/N Ratio:     41.4004830889689  [ if not an image trigger ]
     Image S/N Ratio:    10.13

  Flight Position:   [ source = BAT ]
    RA: 95.1007140995549   Dec: -8.96344268717607  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 95.0923448292485   Dec: -8.96199624551606  [deg; J2000]  
        { 06h 20m 22.2s , -08d 57' 43.2" }
         +/- 0.451449491801224 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.119859344174455 [arcmin] (formal 1-sigma fit error)
    SNR: 94.74010322844
 
  Angular difference between Flight and Ground position is 0.503560 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 186.50799998641 +/- 39.5070497329129
        Measured from: 0.736000001430511
                   to: 187.243999987841     [s; relative to TRIGTIME]
     T50: 7.70800000429153 +/- 1.99776677446814
        Measured from: 6.78799998760223
                   to: 14.4959999918938     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.49199998378754     
                   to: 7.49199998378754     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.140000015497208     
                   to: 326.136000007391     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.977640   5.477200   5.145296   1.607182
           0.096987   0.103242   0.096073   0.090995 [error]
 Peak      0.393198   0.885792   1.222564   0.490996
           0.012105   0.017203   0.020541   0.017064 [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 1.16e-06 2.41e-06 3.89e-06 1.41e-05 1.08e-05 2.15e-05   erg/cm2
              Error 5.98e-08 6.99e-08 1.02e-07 9.03e-07 2.55e-07 9.35e-07   erg/cm2
Peak flux Power-law 3.88e+00 6.24e+00 7.58e+00 1.81e+01 2.29e+01 3.58e+01   ph/cm2/s
              Error 1.44e-01 1.42e-01 1.50e-01 7.64e-01 4.18e-01 8.45e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.16e-06 2.41e-06 3.89e-06 1.40e-05 1.08e-05 2.14e-05   erg/cm2
              Error 6.06e-08 6.99e-08 1.01e-07 8.88e-07 2.55e-07 1.35e-06   erg/cm2
Peak flux Cutoff-PL 3.64e+00 6.37e+00 7.87e+00 1.37e+01 2.28e+01 3.15e+01   ph/cm2/s
              Error 1.78e-01 1.56e-01 1.97e-01 1.72e+00 4.20e-01 1.70e+00   ph/cm2/s
 
Fluence        Band 1.12e-06 2.36e-06 3.87e-06 1.42e-05 1.07e-05 2.15e-05   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 3.64e+00 6.37e+00 7.87e+00 1.37e+01 2.28e+01 3.15e+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    1.308    0.045    -      -           3.34e-03 7.66e-05   62.970 57
CPL   1.305    0.076    9869.0 -228.4      3.35e-03 2.10e-04   63.070 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    0.720    0.031    -      -           1.98e-01 3.67e-03   92.270 57
CPL   0.457    0.123     342.1  159.9      2.60e-01 3.23e-02   78.120 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: 9.344000 sec.
T50 in the 50-300 keV band: 2.048000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  326.276   -0.140  326.136
T90   186.508    0.736  187.244
T50     7.708    6.788   14.496
Peak    1.000    6.492    7.492

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   95.0923  -8.9620 0.0020   33.1    3.9      10.6201    94.7  TRIG_00348152       
------------------------------------------
 
Foreground time interval of the image:
 -0.140   9.413 (delta_t =   9.553 [sec])
Background time interval of the image:
-239.488  -0.140 (delta_t = 239.348 [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   -0.140 sec. to  326.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30818     ( -0.0454949   0.0453047 )
Norm@50keV  : 3.34330E-03    ( -7.66819e-05   7.65942e-05 )
------------------------------------------------------------
# Chi-Squared =          62.97 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     57 degrees of freedom 
# Null hypothesis probability =   2.732533e-01
 
Photon flux (15-150 keV)    in 326.3 sec: 0.399471 ( -0.0102653  0.0103033 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07589e-05 ( -2.54554e-07  2.55076e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.140 sec. to  326.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30491     ( -0.106609   0.0449945 )
Epeak [keV] : 9869.02      ( -588.258 -1045.02 )
Norm@50keV  : 3.35151E-03    ( -7.62468e-05   0.000342799 )
------------------------------------------------------------
# Chi-Squared =          63.07 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     56 degrees of freedom 
# Null hypothesis probability =   2.407183e-01
 
Photon flux (15-150 keV)    in 326.3 sec: 0.399202 ( -0.01019  0.010301 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07593e-05 ( -2.53535e-07  2.56407e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.140 sec. to  326.136 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03047   ( 1.03048   1.03048 )
beta        : -1.30816    ( -0.0453167   0.0454103 )
Epeak [keV] : 44.2190      ( -44.2175 -44.2175 )
Norm@50keV   : 6.46211E-03    ( -0.00222349   0 )
------------------------------------------------------------
# Chi-Squared =          62.97 using 59 PHA bins.
# Reduced chi-squared =          1.145 for     55 degrees of freedom 
# Null hypothesis probability =   2.149913e-01
 
Photon flux (15-150 keV)    in 326.3 sec: 0.393106 ( -0.008902  0.009189 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06797e-05 ( -2.49261e-07  2.6029e-07 ) 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    6.492 sec. to    7.492 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.719927     ( -0.0307059   0.0305537 )
Norm@50keV  : 0.198222    ( -0.00367282   0.00367049 )
------------------------------------------------------------
# Chi-Squared =          92.27 using 59 PHA bins.
# Reduced chi-squared =          1.619 for     57 degrees of freedom 
# Null hypothesis probability =   2.148495e-03
 
Photon flux (15-150 keV)    in 1 sec: 22.8786 ( -0.417768  0.41775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39807e-06 ( -5.01622e-08  5.0203e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    6.492 sec. to    7.492 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.456949     ( -0.124896   0.121288 )
Epeak [keV] : 342.071      ( -90.1576 229.556 )
Norm@50keV  : 0.260150    ( -0.0298975   0.034649 )
------------------------------------------------------------
# Chi-Squared =          78.12 using 59 PHA bins.
# Reduced chi-squared =          1.395 for     56 degrees of freedom 
# Null hypothesis probability =   2.703049e-02
 
Photon flux (15-150 keV)    in 1 sec: 22.7942 ( -0.4201  0.42 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37868e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    6.492 sec. to    7.492 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99995   ( -39287.8   -39287.8 )
beta        : -0.735881    ( -0.0376677   0.0356014 )
Epeak [keV] : 24.1377      ( -24.2458 3.18534 )
Norm@50keV   : 1.26307E+04    ( -6060.28   1.51458e+07 )
------------------------------------------------------------
# Chi-Squared =          90.09 using 59 PHA bins.
# Reduced chi-squared =          1.638 for     55 degrees of freedom 
# Null hypothesis probability =   1.987869e-03
 
Photon flux (15-150 keV)    in 1 sec: 22.7942 ( -0.4201  0.42 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.36945e-06 ( -5.2115e-08  5.1925e-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:
Thu Jun  2 10:37:23 EDT 2011