batgrbproduct Analysis for Trigger=550906

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Mar 14 07:31:40 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger550906/GCN5_download_cron
======================================================================

  Trigger: 00550906      Segment: 000

  BAT Trigger Time: 384883701.376   [s; MET]
      Trigger Stop: 384883701.504   [s; MET]
               UTC: 2013-03-13T16:08:11.057240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 236.42303778442   Dec: -0.361783296507332  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.95
     Image Trigger?:     NO
     Rate S/N Ratio:     12.9228479833201  [ if not an image trigger ]
     Image S/N Ratio:    7.95

  Flight Position:   [ source = BAT ]
    RA: 236.42303778442   Dec: -0.361783296507332  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 236.437668896008   Dec: -0.360646794772632  [deg; J2000]  
        { 15h 45m 45.0s , -00d 21' 38.3" }
         +/- 2.39182249317526 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.09537439064595 [arcmin] (formal 1-sigma fit error)
    SNR: 8.75138981007932
 
  Angular difference between Flight and Ground position is 0.880494 arcmin
 
  Partial Coding Fraction: 0.828125    [ including projection effects ]

  Duration
     T90: 0.171999931335449 +/- 0.0357770801763245
        Measured from: 0.020000159740448
                   to: 0.192000091075897     [s; relative to TRIGTIME]
     T50: 0.0839999318122864 +/- 0.0393954323691675
        Measured from: 0.0440001487731934
                   to: 0.12800008058548     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.38400000333786     
                   to: 0.61599999666214     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0120000243186951     
                   to: 0.216000020503998     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.015215   0.015742   0.015895   0.004808
           0.003270   0.003082   0.002879   0.002173 [error]
 Peak      0.015766   0.019609   0.018928   0.005257
           0.006515   0.005974   0.005201   0.004324 [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 4.00e-09 7.32e-09 1.03e-08 3.04e-08 2.95e-08 5.20e-08   erg/cm2
              Error 1.27e-09 1.43e-09 2.69e-09 1.73e-08 6.44e-09 1.94e-08   erg/cm2
Peak flux Power-law 1.31e-01 1.50e-01 1.23e-01 1.70e-01 4.67e-01 5.75e-01   ph/cm2/s
              Error 7.11e-02 5.07e-02 4.16e-02 1.23e-01 1.41e-01 1.72e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.90e-09 7.44e-09 1.04e-08 2.38e-08 2.92e-08 4.55e-08   erg/cm2
              Error 1.44e-09 1.65e-09 2.87e-09 2.49e-08 6.86e-09 2.46e-08   erg/cm2
Peak flux Cutoff-PL 8.83e-02 1.59e-01 1.41e-01 5.62e-02 4.29e-01 4.45e-01   ph/cm2/s
              Error 8.68e-02 6.24e-02 5.31e-02 1.24e-01 1.52e-01 2.12e-01   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 4.50e-01 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    1.508    0.345    -      -           1.53e-02 3.00e-03   68.170 57
CPL   1.353    1.512     210.3    0.0      1.83e-02 5.07e-02   68.120 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.282    0.512    -      -           3.92e-03 1.14e-03   49.150 57
CPL  -0.209    3.129      81.9  -25.4      1.85e-02 4.93e-01   47.930 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    0.204    0.012    0.216
T90     0.172    0.020    0.192
T50     0.084    0.044    0.128
Peak    1.000   -0.384    0.616

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  236.4377  -0.3606 0.0219   20.8  -50.6       0.0474     8.8  TRIG_00550906       
------------------------------------------
 
Foreground time interval of the image:
  0.012   0.216 (delta_t =   0.204 [sec])
Background time interval of the image:
-239.376   0.012 (delta_t = 239.388 [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    0.012 sec. to    0.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50812     ( -0.338718   0.3506 )
Norm@50keV  : 1.52528E-02    ( -0.00302969   0.00297723 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.17 using 59 PHA bins.
# Reduced chi-squared =          1.196 for     57 degrees of freedom 
# Null hypothesis probability =   1.477442e-01
 
Photon flux (15-150 keV)    in 0.204 sec: 1.90833 ( -0.363412  0.36434 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94792e-08 ( -6.36478e-09  6.50666e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.012 sec. to    0.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35341     ( -1.51757   1.50591 )
Epeak [keV] : 210.261      ( -210.154 -210.154 )
Norm@50keV  : 1.82627E-02    ( -0.018265   0.0831675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.12 using 59 PHA bins.
# Reduced chi-squared =          1.216 for     56 degrees of freedom 
# Null hypothesis probability =   1.284037e-01
 
Photon flux (15-150 keV)    in 0.204 sec: 1.89483 ( -0.37947  0.37334 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9152e-08 ( -6.9666e-09  6.76158e-09 ) ergs/cm2
 
Band function
Time interval is from    0.012 sec. to    0.216 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34183   ( -0.47438   0.691469 )
beta        : -9.25081    ( 9.36906   19.3137 )
Epeak [keV] : 203.322      ( -144.189 -203.233 )
Norm@50keV   : 1.82174E-02    ( -0.00617345   0.0250601 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.14 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     55 degrees of freedom 
# Null hypothesis probability =   1.098943e-01
 
Photon flux (15-150 keV)    in 0.204 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]    : 15.3689  (-3.4861  4.55192)
R^2/D10^2   : 0.197352  (-0.117016   0.2842)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.06 using 59 PHA bins.
# Reduced chi-squared =          1.317 for     57 degrees of freedom 
# Null hypothesis probability =   5.467531e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.983e-09   8.012e-10
25- 50  8.053e-09   2.878e-09
50-150  1.308e-08   5.305e-09
15-150  2.312e-08   8.737e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-108.742      -199.363)
Norm        : 7.79070       (-1.46167     1.4632)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.23 using 59 PHA bins.
# Reduced chi-squared =          1.197 for     57 degrees of freedom 
# Null hypothesis probability =   1.465262e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.958e-09   2.313e-09
25- 50  7.613e-09   4.431e-09
50-150  1.670e-08   9.437e-09
15-150  2.827e-08   1.656e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.02609        (-2.46295      5.35508)
R1^2/D10^2  : 6.41754        (-5.85602      155.577)
kT2 [keV]   : 22.0427        (-6.68934      31.7399)
R2^2/D10^2  : 4.87092E-02    (-0.0461682   0.0776658)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.88 using 59 PHA bins.
# Reduced chi-squared =          1.234 for     55 degrees of freedom 
# Null hypothesis probability =   1.139120e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.143e-09   2.350e-09
25- 50  6.876e-09   3.579e-09
50-150  1.725e-08   1.027e-08
15-150  2.827e-08   1.517e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.384 sec. to    0.616 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28235     ( -0.516989   0.506685 )
Norm@50keV  : 3.92355E-03    ( -0.00113942   0.00113909 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.15 using 59 PHA bins.
# Reduced chi-squared =         0.8624 for     57 degrees of freedom 
# Null hypothesis probability =   7.606160e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.466607 ( -0.139829  0.141327 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8941e-08 ( -1.21885e-08  1.24901e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.384 sec. to    0.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.208838     ( -4.38383   1.87504 )
Epeak [keV] : 81.9218      ( -30.9554 -81.669 )
Norm@50keV  : 1.84748E-02    ( -0.0188026   0.96703 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.93 using 59 PHA bins.
# Reduced chi-squared =         0.8560 for     56 degrees of freedom 
# Null hypothesis probability =   7.698563e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.429376 ( -0.151307  0.152554 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.57846e-08 ( -1.25519e-08  1.34613e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.384 sec. to    0.616 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.210476   ( -1.40741   4.40498 )
beta        : -10.0000    ( 10   1.24345e-14 )
Epeak [keV] : 81.6325      ( -28.4241 155.969 )
Norm@50keV   : 1.86011E-02    ( -0.0185825   0.965787 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.93 using 59 PHA bins.
# Reduced chi-squared =         0.8715 for     55 degrees of freedom 
# Null hypothesis probability =   7.391179e-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]    : 18.4418  (-5.0828  7.7742)
R^2/D10^2   : 2.83007E-02  (-0.0283007   0.0560512)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.25 using 59 PHA bins.
# Reduced chi-squared =         0.8466 for     57 degrees of freedom 
# Null hypothesis probability =   7.886740e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.912e-09   1.186e-09
25- 50  9.001e-09   5.158e-09
50-150  2.235e-08   1.461e-08
15-150  3.327e-08   2.042e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-112.841      -199.363)
Norm        : 1.95437       (-0.571184     0.571202)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.59 using 59 PHA bins.
# Reduced chi-squared =         0.8699 for     57 degrees of freedom 
# Null hypothesis probability =   7.465762e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.867e-09   3.005e-09
25- 50  9.362e-09   5.690e-09
50-150  2.053e-08   1.224e-08
15-150  3.476e-08   2.152e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.72399        (-2.72144      21.8579)
R1^2/D10^2  : 16.8086        (-16.9547      -16.9547)
kT2 [keV]   : 19.5256        (-5.69127      -19.5237)
R2^2/D10^2  : 2.27278E-02    (-0.0227366   0.0473284)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.43 using 59 PHA bins.
# Reduced chi-squared =         0.8623 for     55 degrees of freedom 
# Null hypothesis probability =   7.560609e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.368e-09   1.574e-09
25- 50  8.437e-09   4.994e-09
50-150  2.327e-08   1.498e-08
15-150  3.508e-08   2.016e-08
Plot creation:
Thu Mar 14 07:51:08 EDT 2013