batgrbproduct Analysis for Trigger=678929

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Mar 13 15:58:12 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger678929/batgroup_hand_proc
======================================================================

  Trigger: 00678929      Segment: 000

  BAT Trigger Time: 479529451.776   [s; MET]
      Trigger Stop: 479529478.656   [s; MET]
               UTC: 2016-03-13T02:37:15.804900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 183.787873774764   Dec: 57.2928358615757  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.71
     Image Trigger?:     NO
     Rate S/N Ratio:     9.89949493661167  [ if not an image trigger ]
     Image S/N Ratio:    8.71

  Flight Position:   [ source = BAT ]
    RA: 183.787873774764   Dec: 57.2928358615757  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 183.821034698105   Dec: 57.2777930753815  [deg; J2000]  
        { 12h 15m 17.0s , +57d 16' 40.1" }
         +/- 2.00408669935266 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.922695431527082 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2670205408491
 
  Angular difference between Flight and Ground position is 1.403903 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 42.62399995327 +/- 6.41100459014352
        Measured from: -2.5440000295639
                   to: 40.0799999237061     [s; relative to TRIGTIME]
     T50: 20.0559999346733 +/- 5.85556318242348
        Measured from: 8.43199998140335
                   to: 28.4879999160767     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 24.7919999957085     
                   to: 25.7919999957085     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.60400003194809     
                   to: 44.6559999585152     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.269444   0.278433   0.296775   0.080835
           0.039387   0.039542   0.034375   0.028836 [error]
 Peak      0.017002   0.013469   0.011986   0.008352
           0.005677   0.005707   0.004869   0.004146 [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 6.62e-08 1.33e-07 2.07e-07 7.09e-07 5.76e-07 1.11e-06   erg/cm2
              Error 1.56e-08 1.84e-08 3.37e-08 2.61e-07 8.28e-08 2.83e-07   erg/cm2
Peak flux Power-law 1.54e-01 1.25e-01 6.89e-02 5.57e-02 3.73e-01 4.04e-01   ph/cm2/s
              Error 7.98e-02 4.40e-02 4.07e-02 7.38e-02 1.31e-01 1.47e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.52e-08 1.33e-07 2.08e-07 6.47e-07 5.77e-07 1.05e-06   erg/cm2
              Error 1.29e-08 1.93e-08 3.54e-08 3.26e-07 8.38e-08 3.17e-07   erg/cm2
Peak flux Cutoff-PL 1.56e-01 1.25e-01 6.72e-02 5.17e-02 3.73e-01 4.02e-01   ph/cm2/s
              Error 8.13e-02 3.67e-02 4.13e-02 7.34e-02 1.31e-01 1.47e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.360    0.233    -      -           1.18e-03 1.50e-04   50.530 57
CPL   1.365    0.235    9999.4    0.0      1.18e-03 9.03e-04   50.540 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    1.861    0.752    -      -           2.64e-03 1.20e-03   59.830 57
CPL   2.130    1.925      53.4    0.0      1.90e-03 0.00e+00   59.760 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: 33.472000 sec.
T50 in the 50-300 keV band: 20.736000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   50.260   -5.604   44.656
T90    42.624   -2.544   40.080
T50    20.056    8.432   28.488
Peak    1.000   24.792   25.792

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  183.8210    57.2778   0.0171    17.9561  -102.9737         0.9048962     11.267 TRIG_00678929                 
 
Foreground time interval of the image:
 -5.604  44.656 (delta_t =  50.260 [sec])
Background time interval of the image:
-239.275  -5.604 (delta_t = 233.671 [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   -5.604 sec. to   44.656 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36032     ( -0.233124   0.233464 )
Norm@50keV  : 1.17635E-03    ( -0.000150458   0.000150023 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.53 using 59 PHA bins.
# Reduced chi-squared =         0.8865 for     57 degrees of freedom 
# Null hypothesis probability =   7.147165e-01
 
Photon flux (15-150 keV)    in 50.26 sec: 0.142021 ( -0.0184808  0.0185328 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.76125e-07 ( -8.23334e-08  8.3218e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -5.604 sec. to   44.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36459     ( -0.239704   0.230473 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 1.17857E-03    ( -0.00015032   0.001656 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.54 using 59 PHA bins.
# Reduced chi-squared =         0.9025 for     56 degrees of freedom 
# Null hypothesis probability =   6.809506e-01
 
Photon flux (15-150 keV)    in 50.26 sec: 0.142029 ( -0.0186  0.018326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.77141e-07 ( -8.5917e-08  8.1763e-08 ) ergs/cm2
 
Band function
Time interval is from   -5.604 sec. to   44.656 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.12289   ( 1.12289   1.12289 )
beta        : -1.36031    ( -3.01007   0.233296 )
Epeak [keV] : 30.3111      ( -30.3093 -30.3093 )
Norm@50keV   : 2.29088E-03    ( -0.00104304   0.177982 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.53 using 59 PHA bins.
# Reduced chi-squared =         0.9188 for     55 degrees of freedom 
# Null hypothesis probability =   6.458114e-01
 
Photon flux (15-150 keV)    in 50.26 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]    : 18.0815  (-2.94893  3.67433)
R^2/D10^2   : 8.61784E-03  (-0.00397107   0.00712577)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.35 using 59 PHA bins.
# Reduced chi-squared =          1.182 for     57 degrees of freedom 
# Null hypothesis probability =   1.640029e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.831e-08   7.820e-09
25- 50  1.314e-07   2.897e-08
50-150  3.121e-07   8.421e-08
15-150  4.718e-07   9.054e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-54.8242      -200)
Norm        : 0.585592       (-0.0746764     0.0746764)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.20 using 59 PHA bins.
# Reduced chi-squared =         0.9333 for     57 degrees of freedom 
# Null hypothesis probability =   6.184425e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.329e-08   4.167e-08
25- 50  1.410e-07   7.836e-08
50-150  3.092e-07   1.728e-07
15-150  5.235e-07   2.950e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.68403        (-2.014      3.12992)
R1^2/D10^2  : 0.619059        (-0.533      9.99123)
kT2 [keV]   : 24.5881        (-5.22363      11.0181)
R2^2/D10^2  : 2.78771E-03    (-0.00197466   0.00372548)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.88 using 59 PHA bins.
# Reduced chi-squared =         0.9069 for     55 degrees of freedom 
# Null hypothesis probability =   6.700713e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.269e-08   3.851e-08
25- 50  1.155e-07   4.095e-08
50-150  3.761e-07   1.451e-07
15-150  5.643e-07   2.198e-07

Peak spectrum fit

Power-law model
Time interval is from   24.792 sec. to   25.792 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86123     ( -0.674028   0.829129 )
Norm@50keV  : 2.64016E-03    ( -0.00126768   0.00113047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     57 degrees of freedom 
# Null hypothesis probability =   3.732671e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.372808 ( -0.131019  0.131027 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.42726e-08 ( -1.04588e-08  1.11972e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   24.792 sec. to   25.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.13016     ( -3.13324   0.715786 )
Epeak [keV] : 53.3775      (   )
Norm@50keV  : 1.89655E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.76 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     56 degrees of freedom 
# Null hypothesis probability =   3.409135e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.373046 ( -0.131443  0.130667 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.44978e-08 ( -1.16898e-08  1.07956e-08 ) ergs/cm2
 
Band function
Time interval is from   24.792 sec. to   25.792 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48635   ( 1.48975   1.48975 )
beta        : -1.85069    ( 1.86108   0.673354 )
Epeak [keV] : 17.5559      ( -16.777 -16.777 )
Norm@50keV   : 6.27968E-03    ( -0.00641351   4.73182 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.088 for     55 degrees of freedom 
# Null hypothesis probability =   3.045902e-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]    : 10.9641  (-4.98579  7.76833)
R^2/D10^2   : 0.121102  (-0.118928   1.0333)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.04 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.713872e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.040e-09   1.963e-09
25- 50  8.559e-09   5.475e-09
50-150  5.797e-09   4.574e-09
15-150  1.740e-08   1.126e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 92.9668       (-92.9583      -92.9583)
Norm        : 1.66805       (-0.679626     1.50879)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.19 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     57 degrees of freedom 
# Null hypothesis probability =   3.611973e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.356e-09   2.709e-09
25- 50  7.419e-09   4.681e-09
50-150  1.152e-08   9.855e-09
15-150  2.330e-08   1.658e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.92479        (-3.74622      8.82431)
R1^2/D10^2  : 4.76437        (-4.67385      -4.76438)
kT2 [keV]   : 17.9203        (-8.84847      -17.9203)
R2^2/D10^2  : 1.64091E-02    (-0.0158721   0.229882)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.94 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     55 degrees of freedom 
# Null hypothesis probability =   3.012426e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.006e-09   3.064e-09
25- 50  6.220e-09   3.500e-09
50-150  1.135e-08   8.020e-09
15-150  2.258e-08   1.388e-08
Plot creation:
Sun Mar 13 16:11:08 EDT 2016