batgrbproduct Analysis for Trigger=557828

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jun 10 20:43:06 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger557828/batgroup_hand_proc
======================================================================

  Trigger: 00557828      Segment: 000

  BAT Trigger Time: 392506731.072   [s; MET]
      Trigger Stop: 392506732.096   [s; MET]
               UTC: 2013-06-09T21:38:40.416520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 53.7539682175759   Dec: -40.1534346904126  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.03
     Image Trigger?:     NO
     Rate S/N Ratio:     44.4747119158742  [ if not an image trigger ]
     Image S/N Ratio:    11.03

  Flight Position:   [ source = BAT ]
    RA: 53.7539682175759   Dec: -40.1534346904126  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 53.7756433191991   Dec: -40.1693721682409  [deg; J2000]  
        { 03h 35m 06.2s , -40d 10' 09.7" }
         +/- 0.719004327649441 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.22895014360323 [arcmin] (formal 1-sigma fit error)
    SNR: 48.7290179979518
 
  Angular difference between Flight and Ground position is 1.379211 arcmin
 
  Partial Coding Fraction: 0.4375    [ including projection effects ]

  Duration
     T90: 210.627999961376 +/- 15.0713763059169
        Measured from: 0.223999977111816
                   to: 210.851999938488     [s; relative to TRIGTIME]
     T50: 76.0999999642372 +/- 33.9616221978202
        Measured from: 7.96399998664856
                   to: 84.0639999508858     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 16.7239999771118     
                   to: 17.7239999771118     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -7.83600002527237     
                   to: 307.587999999523     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     5.981087   8.212970   7.638965   2.255136
           0.121316   0.126676   0.120334   0.105675 [error]
 Peak      0.207316   0.345669   0.408283   0.126563
           0.013664   0.016774   0.018056   0.013454 [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 1.77e-06 3.63e-06 5.80e-06 2.06e-05 1.61e-05 3.18e-05   erg/cm2
              Error 7.93e-08 9.28e-08 1.32e-07 1.14e-06 3.32e-07 1.18e-06   erg/cm2
Peak flux Power-law 1.95e+00 2.60e+00 2.54e+00 4.45e+00 8.55e+00 1.15e+01   ph/cm2/s
              Error 1.93e-01 1.56e-01 1.40e-01 5.27e-01 4.30e-01 6.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.71e-06 3.64e-06 5.87e-06 1.78e-05 1.60e-05 2.90e-05   erg/cm2
              Error 8.14e-08 9.49e-08 1.20e-07 3.07e-06 3.60e-07 3.93e-06   erg/cm2
Peak flux Cutoff-PL 1.78e+00 2.65e+00 2.66e+00 3.18e+00 8.44e+00 1.03e+01   ph/cm2/s
              Error 2.50e-01 1.68e-01 1.80e-01 1.25e+00 4.42e-01 1.14e+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 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    1.324    0.039    -      -           5.19e-03 1.05e-04   55.590 57
CPL   1.200    0.139     387.3    0.0      5.85e-03 0.00e+00   53.840 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared 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    1.033    0.086    -      -           7.41e-02 3.66e-03   60.580 57
CPL   0.683    0.352     219.3 1456.5      1.06e-01 3.72e-02   57.540 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: 187.904000 sec.
T50 in the 50-300 keV band: 15.872000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  315.424   -7.836  307.588
T90   210.628    0.224  210.852
T50    76.100    7.964   84.064
Peak    1.000   16.724   17.724

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   53.7756   -40.1694   0.0039    32.0511   -69.4897         8.2270228     48.729 TRIG_00557828                 
 
Foreground time interval of the image:
 -7.836  12.029 (delta_t =  19.865 [sec])
Background time interval of the image:
-239.072  -7.836 (delta_t = 231.236 [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   -7.836 sec. to  307.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32381     ( -0.0391095   0.039035 )
Norm@50keV  : 5.18921E-03    ( -0.000104904   0.000104786 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.59 using 59 PHA bins.
# Reduced chi-squared =         0.9753 for     57 degrees of freedom 
# Null hypothesis probability =   5.280699e-01
 
Photon flux (15-150 keV)    in 315.4 sec: 0.621880 ( -0.0141623  0.0142359 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.60815e-05 ( -3.31804e-07  3.32056e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -7.836 sec. to  307.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20021     ( -0.163776   0.11336 )
Epeak [keV] : 387.323      (   )
Norm@50keV  : 5.84558E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.84 using 59 PHA bins.
# Reduced chi-squared =         0.9615 for     56 degrees of freedom 
# Null hypothesis probability =   5.568922e-01
 
Photon flux (15-150 keV)    in 315.4 sec: 0.615409 ( -0.01617  0.016186 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59828e-05 ( -3.6066e-07  3.58799e-07 ) ergs/cm2
 
Band function
Time interval is from   -7.836 sec. to  307.588 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.03945   ( 1.0402   1.0402 )
beta        : -1.32379    ( -0.0390427   0.0390979 )
Epeak [keV] : 46.5689      (   )
Norm@50keV   : 9.94697E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.59 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     55 degrees of freedom 
# Null hypothesis probability =   4.523328e-01
 
Photon flux (15-150 keV)    in 315.4 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]    : 19.8135  (  )
R^2/D10^2   : 2.76144E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         481.99 using 59 PHA bins.
# Reduced chi-squared =         8.4559 for     57 degrees of freedom 
# Null hypothesis probability =   1.370080e-68
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.616e-07   2.618e-08
25- 50  3.275e-06   9.777e-08
50-150  9.518e-06   3.217e-07
15-150  1.345e-05   2.886e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 2.65197       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         192.56 using 59 PHA bins.
# Reduced chi-squared =         3.3783 for     57 degrees of freedom 
# Null hypothesis probability =   1.311093e-16
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.083e-06   5.141e-08
25- 50  4.007e-06   9.620e-08
50-150  8.787e-06   1.861e-07
15-150  1.488e-05   3.501e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.58068        (-0.738803      0.795025)
R1^2/D10^2  : 0.406833        (-0.11645      0.181485)
kT2 [keV]   : 29.9689        (-2.05794      2.56586)
R2^2/D10^2  : 5.89840E-03    (-0.00146077   0.00168212)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.14 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     55 degrees of freedom 
# Null hypothesis probability =   1.097845e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.539e-06   1.236e-07
25- 50  3.644e-06   1.735e-07
50-150  1.068e-05   4.494e-07
15-150  1.586e-05   6.040e-07

Peak spectrum fit

Power-law model
Time interval is from   16.724 sec. to   17.724 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.03288     ( -0.0857819   0.0854257 )
Norm@50keV  : 7.41407E-02    ( -0.00366056   0.00365767 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.58 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.481098e-01
 
Photon flux (15-150 keV)    in 1 sec: 8.55257 ( -0.429568  0.429582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.92599e-07 ( -4.34938e-08  4.37363e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   16.724 sec. to   17.724 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.682913     ( -0.372168   0.331639 )
Epeak [keV] : 219.279      ( -83.7142 2829.22 )
Norm@50keV  : 0.105852    ( -0.0275784   0.0469086 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.54 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     56 degrees of freedom 
# Null hypothesis probability =   4.178406e-01
 
Photon flux (15-150 keV)    in 1 sec: 8.44312 ( -0.44221  0.44218 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.82833e-07 ( -4.5474e-08  4.5244e-08 ) ergs/cm2
 
Band function
Time interval is from   16.724 sec. to   17.724 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.874666   ( 0.874666   0.874666 )
beta        : -1.03289    ( -0.0854206   0.0858158 )
Epeak [keV] : 47.4855      (   )
Norm@50keV   : 0.119434    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.58 using 59 PHA bins.
# Reduced chi-squared =          1.101 for     55 degrees of freedom 
# Null hypothesis probability =   2.816764e-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]    : 21.5706  (-1.37866  1.50823)
R^2/D10^2   : 0.329024  (-0.0629204   0.076121)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         113.92 using 59 PHA bins.
# Reduced chi-squared =         1.9986 for     57 degrees of freedom 
# Null hypothesis probability =   1.138419e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.859e-08   2.905e-09
25- 50  1.494e-07   1.005e-08
50-150  5.189e-07   4.020e-08
15-150  6.969e-07   4.485e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 34.3853       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         155.88 using 59 PHA bins.
# Reduced chi-squared =         2.7347 for     57 degrees of freedom 
# Null hypothesis probability =   3.984915e-11
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.562e-08   4.570e-09
25- 50  1.647e-07   1.005e-08
50-150  3.612e-07   2.645e-08
15-150  6.116e-07   5.965e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.46511        (-2.57676      3.40222)
R1^2/D10^2  : 4.31644        (-2.74242      15.1088)
kT2 [keV]   : 30.3925        (-4.84993      10.315)
R2^2/D10^2  : 9.77547E-02    (-0.0603388   0.0796012)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.36 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     55 degrees of freedom 
# Null hypothesis probability =   2.586042e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.513e-08   1.667e-08
25- 50  1.505e-07   2.325e-08
50-150  5.773e-07   9.105e-08
15-150  7.829e-07   1.172e-07
Plot creation:
Mon Jun 10 21:05:35 EDT 2013