batgrbproduct Analysis for Trigger=552142

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Mar 28 20:23:53 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger552142/GCN5_download_cron
======================================================================

  Trigger: 00552142      Segment: 000

  BAT Trigger Time: 386129648   [s; MET]
      Trigger Stop: 386129712   [s; MET]
               UTC: 2013-03-28T02:13:57.626700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 270.747131670602   Dec: 21.327205081268  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.08
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.08

  Flight Position:   [ source = BAT ]
    RA: 270.747131670602   Dec: 21.327205081268  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 270.81256045641   Dec: 21.3688855995782  [deg; J2000]  
        { 18h 03m 15.0s , +21d 22' 08.0" }
         +/- 3.55644705886345 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.84830066303713 [arcmin] (formal 1-sigma fit error)
    SNR: 4.96537631475907
 
  Angular difference between Flight and Ground position is 4.429806 arcmin
 
  Partial Coding Fraction: 0.796875    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.231156   0.255999  -0.054423  -0.005346
           0.051373   0.049581   0.041498   0.035751 [error]
 Peak      0.231156   0.255999  -0.054423  -0.005346
           0.051373   0.049581   0.041498   0.035751 [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 7.75e-08 6.85e-08 4.16e-08 3.82e-08 2.04e-07 2.25e-07   erg/cm2
              Error 2.26e-08 2.34e-08 2.68e-08 5.12e-08 7.09e-08 9.63e-08   erg/cm2
Peak flux Power-law 4.10e-02 2.03e-02 6.16e-03 2.37e-03 6.88e-02 6.99e-02   ph/cm2/s
              Error 1.22e-02 6.69e-03 3.85e-03 3.00e-03 1.88e-02 1.92e-02   ph/cm2/s
 
Fluence   Cutoff-PL 7.64e-08 9.54e-08 5.26e-09 8.83e-13 1.77e-07 1.77e-07   erg/cm2
              Error 2.65e-08 3.57e-08 1.38e-08 4.32e-10 4.93e-08 4.93e-08   erg/cm2
Peak flux Cutoff-PL 3.84e-02 2.95e-02 9.38e-04 8.38e-08 6.89e-02 6.89e-02   ph/cm2/s
              Error 1.41e-02 1.02e-02 2.26e-03 3.83e-05 1.77e-02 1.77e-02   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    2.714    0.575    -      -           3.05e-04 1.49e-04   64.190 57
CPL  -4.588    0.185      26.4    4.9      3.96e+01 0.00e+00   56.040 56
 
The chi2 of BB fit is 56.76 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    2.714    0.575    -      -           3.05e-04 1.49e-04   64.190 57
CPL  -4.588    0.185      26.4    4.9      3.96e+01 0.00e+00   56.040 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  270.8126 +21.3689 0.0389   22.5  147.9       0.4778     5.0  TRIG_00552142       
------------------------------------------
 
Foreground time interval of the image:
  0.000  36.560 (delta_t =  36.560 [sec])
 38.000  64.000 (delta_t =  26.000 [sec])
Background time interval of the image:

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
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.560000
38.000000 64.000000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.71438     ( -0.513556   0.636908 )
Norm@50keV  : 3.05372E-04    ( -0.000142846   0.000155224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.19 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     57 degrees of freedom 
# Null hypothesis probability =   2.392309e-01
 
Photon flux (15-150 keV)    in 62.56 sec: 6.87781E-02 ( -0.0187014  0.0188464 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03838e-07 ( -6.70374e-08  7.47567e-08 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.560000
38.000000 64.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.58766     ( 3.27152   3.64157 )
Epeak [keV] : 26.3569      ( -5.01934 4.82587 )
Norm@50keV  : 39.5723    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.04 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     56 degrees of freedom 
# Null hypothesis probability =   4.733683e-01
 
Photon flux (15-150 keV)    in 62.56 sec: 6.88812E-02 ( -0.0176396  0.0177343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77075e-07 ( -4.77377e-08  5.07681e-08 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 36.560000
38.000000 64.000000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.48264   ( -4.46907   -4.48264 )
beta        : -9.37167    ( 9.37167   19.303 )
Epeak [keV] : 26.2998      ( -4.00315 4.54606 )
Norm@50keV   : 33.8315    ( -8.24515   189.781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.04 using 59 PHA bins.
# Reduced chi-squared =          1.019 for     55 degrees of freedom 
# Null hypothesis probability =   4.355285e-01
 
Photon flux (15-150 keV)    in 62.56 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]    : 6.44645  (-1.23738  1.46665)
R^2/D10^2   : 0.209495  (-0.123495   0.309951)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
# Reduced chi-squared =         0.9957 for     57 degrees of freedom 
# Null hypothesis probability =   4.841735e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.966e-08   4.654e-08
25- 50  9.251e-08   5.295e-08
50-150  1.127e-08   9.359e-09
15-150  1.834e-07   9.754e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 22.6595       (-8.36633      15.6857)
Norm        : 0.759132       (-0.318986     0.591406)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.54 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.493144e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.128e-08   3.097e-08
25- 50  7.801e-08   4.078e-08
50-150  2.859e-08   2.437e-08
15-150  1.879e-07   9.120e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.809897        (-6.43068      72.6382)
R1^2/D10^2  : 7.00231E+04        (      )
kT2 [keV]   : 6.46412        (-1.25238      1.58082)
R2^2/D10^2  : 0.206307    (-0.119783   0.311948)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.74 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   4.093533e-01
# Null hypothesis probability =   4.098853e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.966e-08   1.044e+00
25- 50  9.251e-08   9.009e+00
50-150  1.127e-08   2.270e+02
15-150  1.834e-07   2.066e+02

Peak spectrum fit

Power-law model
Time interval is from   38.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.71438     ( -0.513556   0.636908 )
Norm@50keV  : 3.05372E-04    ( -0.000142846   0.000155224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.19 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     57 degrees of freedom 
# Null hypothesis probability =   2.392309e-01
 
Photon flux (15-150 keV)    in 62.56 sec: 6.87781E-02 ( -0.0187014  0.0188464 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03838e-07 ( -6.70374e-08  7.47567e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   38.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.58766     ( 3.27152   3.64157 )
Epeak [keV] : 26.3569      ( -5.01934 4.82587 )
Norm@50keV  : 39.5723    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.04 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     56 degrees of freedom 
# Null hypothesis probability =   4.733683e-01
 
Photon flux (15-150 keV)    in 62.56 sec: 6.88812E-02 ( -0.0176396  0.0177343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.77075e-07 ( -4.77377e-08  5.07681e-08 ) ergs/cm2
 
Band function
Time interval is from   38.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.48264   ( -4.46907   -4.48264 )
beta        : -9.37167    ( 9.37167   19.303 )
Epeak [keV] : 26.2998      ( -4.00315 4.54606 )
Norm@50keV   : 33.8315    ( -8.24515   189.781 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.04 using 59 PHA bins.
# Reduced chi-squared =          1.019 for     55 degrees of freedom 
# Null hypothesis probability =   4.355285e-01
 
Photon flux (15-150 keV)    in 62.56 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]    : 6.44645  (-1.23738  1.46665)
R^2/D10^2   : 0.209495  (-0.123495   0.309951)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
# Reduced chi-squared =         0.9957 for     57 degrees of freedom 
# Null hypothesis probability =   4.841735e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.966e-08   4.121e-08
25- 50  9.251e-08   5.824e-08
50-150  1.127e-08   9.097e-09
15-150  1.834e-07   1.117e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 22.6595       (-8.36633      15.6857)
Norm        : 0.759132       (-0.318986     0.591406)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.54 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.493144e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.128e-08   3.726e-08
25- 50  7.801e-08   4.614e-08
50-150  2.859e-08   2.366e-08
15-150  1.879e-07   8.795e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.809897        (-6.43068      72.6382)
R1^2/D10^2  : 7.00231E+04        (      )
kT2 [keV]   : 6.46412        (-1.25238      1.58082)
R2^2/D10^2  : 0.206307    (-0.119783   0.311948)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.76 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.74 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   4.093533e-01
# Null hypothesis probability =   4.098853e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.966e-08   1.067e+00
25- 50  9.251e-08   8.727e+00
50-150  1.127e-08   2.457e+02
15-150  1.834e-07   2.168e+02
Plot creation:
Thu Mar 28 20:51:10 EDT 2013