batgrbproduct Analysis for Trigger=668543

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Dec 29 09:53:39 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger668543/batgroup_hand_proc
======================================================================

  Trigger: 00668543      Segment: 000

  BAT Trigger Time: 472964728   [s; MET]
      Trigger Stop: 472964728.256   [s; MET]
               UTC: 2015-12-28T03:05:12.384680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 214.003951052387   Dec: -17.6890004436844  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.53
     Image Trigger?:     NO
     Rate S/N Ratio:     36.8510515453766  [ if not an image trigger ]
     Image S/N Ratio:    6.53

  Flight Position:   [ source = BAT ]
    RA: 214.003951052387   Dec: -17.6890004436844  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 214.016860789574   Dec: -17.664630711655  [deg; J2000]  
        { 14h 16m 04.0s , -17d 39' 52.7" }
         +/- 1.82005449228883 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.689692793923051 [arcmin] (formal 1-sigma fit error)
    SNR: 12.9291284480868
 
  Angular difference between Flight and Ground position is 1.637878 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.275999963283539 +/- 0.039999997615816
        Measured from: -0.0279999971389771
                   to: 0.247999966144562     [s; relative to TRIGTIME]
     T50: 0.12799996137619 +/- 0.0384187534673386
        Measured from: 0.0199999809265137
                   to: 0.147999942302704     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.378000020980835     
                   to: 0.621999979019165     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0360000133514404     
                   to: 0.276000022888184     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.013137   0.043794   0.042769   0.007337
           0.003875   0.004429   0.004680   0.004019 [error]
 Peak      0.014847   0.042095   0.042798   0.009751
           0.006443   0.006703   0.006414   0.005544 [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 5.09e-09 1.40e-08 3.12e-08 1.83e-07 8.40e-08 2.34e-07   erg/cm2
              Error 1.19e-09 2.00e-09 4.17e-09 5.52e-08 1.13e-08 5.76e-08   erg/cm2
Peak flux Power-law 1.78e-01 2.53e-01 2.66e-01 5.18e-01 8.59e-01 1.22e+00   ph/cm2/s
              Error 6.49e-02 5.61e-02 4.92e-02 2.12e-01 1.52e-01 2.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.92e-09 1.53e-08 3.45e-08 4.87e-08 7.81e-08 1.02e-07   erg/cm2
              Error 1.41e-09 2.43e-09 5.14e-09 5.33e-08 1.26e-08 5.36e-08   erg/cm2
Peak flux Cutoff-PL 1.56e-01 2.58e-01 2.81e-01 3.27e-01 8.42e-01 1.02e+00   ph/cm2/s
              Error 7.94e-02 6.11e-02 6.10e-02 3.03e-01 1.57e-01 3.36e-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    0.847    0.200    -      -           2.35e-02 2.84e-03   50.310 57
CPL  -0.317    1.010     110.4   99.5      8.01e-02 1.09e-01   45.110 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    0.925    0.308    -      -           7.49e-03 1.31e-03   43.880 57
CPL   0.444    1.025     188.2    0.0      1.22e-02 1.95e-02   43.360 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: 0.192000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.312   -0.036    0.276
T90     0.276   -0.028    0.248
T50     0.128    0.020    0.148
Peak    1.000   -0.378    0.622

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  214.0169   -17.6646   0.0149    14.2249  -167.1703         0.1133904     12.929 TRIG_00668543                 
 
Foreground time interval of the image:
 -0.036   0.276 (delta_t =   0.312 [sec])
Background time interval of the image:
-67.499  -0.036 (delta_t =  67.463 [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   -0.036 sec. to    0.276 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.846788     ( -0.203166   0.197119 )
Norm@50keV  : 2.34903E-02    ( -0.00284229   0.00283576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.31 using 59 PHA bins.
# Reduced chi-squared =         0.8826 for     57 degrees of freedom 
# Null hypothesis probability =   7.223306e-01
 
Photon flux (15-150 keV)    in 0.312 sec: 2.69661 ( -0.324652  0.324868 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.40072e-08 ( -1.12762e-08  1.14001e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.036 sec. to    0.276 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.317288     ( -1.12471   0.895566 )
Epeak [keV] : 110.374      ( -30.416 168.606 )
Norm@50keV  : 8.01071E-02    ( -0.0482036   0.16984 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.11 using 59 PHA bins.
# Reduced chi-squared =         0.8056 for     56 degrees of freedom 
# Null hypothesis probability =   8.508038e-01
 
Photon flux (15-150 keV)    in 0.312 sec: 2.58840 ( -0.33622  0.33587 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.80839e-08 ( -1.26223e-08  1.2611e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.036 sec. to    0.276 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.277399   ( -0.851607   0.810341 )
beta        : -9.37166    ( 9.37167   19.3717 )
Epeak [keV] : 113.008      ( -43.629 124.574 )
Norm@50keV   : 7.63879E-02    ( -0.0444558   0.051606 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.12 using 59 PHA bins.
# Reduced chi-squared =         0.8204 for     55 degrees of freedom 
# Null hypothesis probability =   8.264917e-01
 
Photon flux (15-150 keV)    in 0.312 sec: 2.58860 (    ) 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]    : 21.8607  (-3.10015  3.87258)
R^2/D10^2   : 0.104203  (-0.0406582   0.0624323)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.77 using 59 PHA bins.
# Reduced chi-squared =         0.8381 for     57 degrees of freedom 
# Null hypothesis probability =   8.029682e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.884e-09   7.045e-10
25- 50  1.519e-08   2.716e-09
50-150  5.423e-08   1.292e-08
15-150  7.231e-08   1.273e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-24.4302      -200)
Norm        : 10.0847       (-1.30972     1.30972)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.17 using 59 PHA bins.
# Reduced chi-squared =          1.389 for     57 degrees of freedom 
# Null hypothesis probability =   2.767612e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.835e-09   4.421e-09
25- 50  1.507e-08   8.377e-09
50-150  3.305e-08   1.817e-08
15-150  5.596e-08   3.139e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.7149        (-7.95867      -12.7149)
R1^2/D10^2  : 0.272629        (-0.226638      1.96869)
kT2 [keV]   : 35.6617        (-30.9168      -35.6617)
R2^2/D10^2  : 1.65833E-02    (-0.0163884   0.0885126)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.38 using 59 PHA bins.
# Reduced chi-squared =         0.8069 for     55 degrees of freedom 
# Null hypothesis probability =   8.464894e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.837e-09   2.231e-09
25- 50  1.586e-08   9.271e-09
50-150  5.970e-08   3.198e-08
15-150  7.940e-08   4.173e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.378 sec. to    0.622 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.925432     ( -0.316333   0.299107 )
Norm@50keV  : 7.48527E-03    ( -0.00131662   0.00130585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.88 using 59 PHA bins.
# Reduced chi-squared =         0.7699 for     57 degrees of freedom 
# Null hypothesis probability =   8.986532e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.859328 ( -0.151097  0.152051 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.31899e-08 ( -1.55447e-08  1.57205e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.378 sec. to    0.622 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.444292     ( -1.42068   0.629093 )
Epeak [keV] : 188.244      ( -188.239 -188.239 )
Norm@50keV  : 1.21542E-02    ( -0.005763   0.0331857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.36 using 59 PHA bins.
# Reduced chi-squared =         0.7743 for     56 degrees of freedom 
# Null hypothesis probability =   8.914355e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.842223 ( -0.156592  0.156831 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.12838e-08 ( -1.65321e-08  1.64401e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.378 sec. to    0.622 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.851427   ( 0.851391   0.851391 )
beta        : -0.928229    ( -0.296604   0.318864 )
Epeak [keV] : 14.9847      (   )
Norm@50keV   : 1.09335E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.88 using 59 PHA bins.
# Reduced chi-squared =         0.7979 for     55 degrees of freedom 
# Null hypothesis probability =   8.590865e-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]    : 23.8018  (-5.01226  7.11065)
R^2/D10^2   : 2.45989E-02  (-0.013384   0.0266152)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.27 using 59 PHA bins.
# Reduced chi-squared =         0.8292 for     57 degrees of freedom 
# Null hypothesis probability =   8.175613e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.483e-09   9.925e-10
25- 50  1.373e-08   4.648e-09
50-150  5.799e-08   2.117e-08
15-150  7.420e-08   2.419e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-46.0867      -200)
Norm        : 3.43735       (-0.626826     0.626826)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.94 using 59 PHA bins.
# Reduced chi-squared =         0.9639 for     57 degrees of freedom 
# Null hypothesis probability =   5.527494e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.563e-09   4.965e-09
25- 50  1.647e-08   9.520e-09
50-150  3.613e-08   2.072e-08
15-150  6.116e-08   3.550e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.89096        (-3.87724      7.13266)
R1^2/D10^2  : 0.363694        (-0.313619      3.18032)
kT2 [keV]   : 33.2195        (-10.2949      47.3308)
R2^2/D10^2  : 7.84624E-03    (-0.00713167   0.0151291)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.22 using 59 PHA bins.
# Reduced chi-squared =         0.7677 for     55 degrees of freedom 
# Null hypothesis probability =   8.966962e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.322e-09   3.167e-09
25- 50  1.507e-08   8.255e-09
50-150  6.234e-08   3.498e-08
15-150  8.274e-08   4.301e-08
Plot creation:
Tue Dec 29 10:10:42 EST 2015