batgrbproduct Analysis for Trigger=716876

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Oct 11 20:37:12 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger716876/batgroup_hand_proc
======================================================================

  Trigger: 00716876      Segment: 000

  BAT Trigger Time: 497858111.104   [s; MET]
      Trigger Stop: 497858113.152   [s; MET]
               UTC: 2016-10-11T05:54:54.113800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.710556686154   Dec: 8.32611886348883  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.98
     Image Trigger?:     NO
     Rate S/N Ratio:     11  [ if not an image trigger ]
     Image S/N Ratio:    6.98

  Flight Position:   [ source = BAT ]
    RA: 245.710556686154   Dec: 8.32611886348883  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 245.6871008266   Dec: 8.31312799802578  [deg; J2000]  
        { 16h 22m 44.9s , +08d 18' 47.3" }
         +/- 2.37180330227411 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.28196841229385 [arcmin] (formal 1-sigma fit error)
    SNR: 8.85710329091067
 
  Angular difference between Flight and Ground position is 1.595843 arcmin
 
  Partial Coding Fraction: 0.4375    [ including projection effects ]

  Duration
     T90: 4.25600004196167 +/- 1.26521460527088
        Measured from: -0.0879999995231628
                   to: 4.16800004243851     [s; relative to TRIGTIME]
     T50: 1.82400000095367 +/- 1.35275723246339
        Measured from: 0.904000043869019
                   to: 2.72800004482269     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.37200003862381     
                   to: 2.37200003862381     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.343999981880188     
                   to: 4.42400002479553     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.048067   0.114179   0.102026   0.026786
           0.023034   0.020405   0.017576   0.014419 [error]
 Peak      0.021971   0.037347   0.027559   0.002833
           0.010583   0.009573   0.008239   0.006401 [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 2.02e-08 4.62e-08 8.35e-08 3.58e-07 2.27e-07 5.08e-07   erg/cm2
              Error 8.50e-09 1.16e-08 1.64e-08 1.69e-07 4.29e-08 1.73e-07   erg/cm2
Peak flux Power-law 3.10e-01 2.88e-01 1.86e-01 1.85e-01 8.60e-01 9.69e-01   ph/cm2/s
              Error 1.49e-01 8.99e-02 6.49e-02 1.29e-01 2.60e-01 2.78e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.99e-08 4.64e-08 8.42e-08 3.29e-07 2.27e-07 4.80e-07   erg/cm2
              Error 9.51e-09 9.22e-09 1.87e-08 2.73e-07 4.42e-08 2.36e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-01 3.53e-01 2.00e-01 2.05e-02 7.57e-01 7.59e-01   ph/cm2/s
              Error 1.79e-01 1.20e-01 8.73e-02 1.04e-01 2.79e-01 2.89e-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    1.146    0.346    -      -           4.63e-03 9.06e-04   40.270 57
CPL   1.081    0.259     806.6    0.0      4.94e-03 8.77e-03   40.270 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    1.633    0.478    -      -           6.63e-03 1.94e-03   58.460 57
CPL  -1.223    4.593      53.1  -20.1      1.95e-01 7.68e+01   55.930 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: 1.856000 sec.
T50 in the 50-300 keV band: 1.024000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    4.768   -0.344    4.424
T90     4.256   -0.088    4.168
T50     1.824    0.904    2.728
Peak    1.000    1.372    2.372

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  245.6871     8.3131   0.0218    42.1847   -29.3337         0.3336086      8.857 TRIG_00716876                 
 
Foreground time interval of the image:
 -0.344   4.424 (delta_t =   4.768 [sec])
Background time interval of the image:
-647.903 -627.573 (delta_t =  20.330 [sec])
-239.104  -0.344 (delta_t = 238.760 [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   -0.344 sec. to    4.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14604     ( -0.360965   0.331951 )
Norm@50keV  : 4.62666E-03    ( -0.000915255   0.000895917 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.27 using 59 PHA bins.
# Reduced chi-squared =         0.7066 for     57 degrees of freedom 
# Null hypothesis probability =   9.543564e-01
 
Photon flux (15-150 keV)    in 4.768 sec: 0.539314 ( -0.112789  0.115028 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.27364e-07 ( -4.27945e-08  4.29469e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.344 sec. to    4.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08143     ( -1.59918   -1.08167 )
Epeak [keV] : 806.637      ( -844.963 -844.963 )
Norm@50keV  : 4.94200E-03    ( -0.00114336   0.016397 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.27 using 59 PHA bins.
# Reduced chi-squared =         0.7191 for     56 degrees of freedom 
# Null hypothesis probability =   9.440386e-01
 
Photon flux (15-150 keV)    in 4.768 sec: 0.537600 ( -0.116619  0.115115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26898e-07 ( -4.51077e-08  4.3324e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.344 sec. to    4.424 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.66629   ( -4.66629   -4.66629 )
beta        : -1.28412    ( -0.442395   0.419993 )
Epeak [keV] : 33.8080      ( -33.808 18.2176 )
Norm@50keV   : 37.9914    ( -6.9705   1.56867e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.45 using 59 PHA bins.
# Reduced chi-squared =         0.7173 for     55 degrees of freedom 
# Null hypothesis probability =   9.435873e-01
 
Photon flux (15-150 keV)    in 4.768 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]    : 21.1148  (-4.99541  7.74951)
R^2/D10^2   : 2.06281E-02  (-0.0131629   0.0310327)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.45 using 59 PHA bins.
# Reduced chi-squared =         0.8149 for     57 degrees of freedom 
# Null hypothesis probability =   8.396296e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.265e-09   3.270e-09
25- 50  4.263e-08   1.647e-08
50-150  1.417e-07   5.109e-08
15-150  1.926e-07   6.372e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-59.1957      -200)
Norm        : 2.37270       (-0.450939     0.450939)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.80 using 59 PHA bins.
# Reduced chi-squared =         0.7860 for     57 degrees of freedom 
# Null hypothesis probability =   8.793893e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.820e-08   1.626e-08
25- 50  5.424e-08   3.106e-08
50-150  1.190e-07   6.856e-08
15-150  2.014e-07   1.158e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.5576        (-4.32923      6.08368)
R1^2/D10^2  : 0.143112        (-0.0953727      0.446876)
kT2 [keV]   : 52.8595        (-31.7572      -67.6335)
R2^2/D10^2  : 9.61260E-04    (-0.000432202   0.00730743)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.72 using 59 PHA bins.
# Reduced chi-squared =         0.7040 for     55 degrees of freedom 
# Null hypothesis probability =   9.529175e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.708e-08   1.091e-08
25- 50  5.197e-08   3.123e-08
50-150  1.519e-07   8.296e-08
15-150  2.209e-07   1.134e-07

Peak spectrum fit

Power-law model
Time interval is from    1.372 sec. to    2.372 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63260     ( -0.474778   0.481566 )
Norm@50keV  : 6.62765E-03    ( -0.00194295   0.00192967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.46 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     57 degrees of freedom 
# Null hypothesis probability =   4.216696e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.860403 ( -0.258595  0.262283 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.17526e-08 ( -1.86213e-08  1.89273e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.372 sec. to    2.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22334     ( -6.18904   2.99674 )
Epeak [keV] : 53.1112      ( -12.8231 -53.0271 )
Norm@50keV  : 0.195217    ( -0.206809   153.352 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.93 using 59 PHA bins.
# Reduced chi-squared =         0.9987 for     56 degrees of freedom 
# Null hypothesis probability =   4.775786e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.757236 ( -0.272772  0.285454 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.12736e-08 ( -1.71859e-08  2.15208e-08 ) ergs/cm2
 
Band function
Time interval is from    1.372 sec. to    2.372 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.57181   ( -1.51405   -1.51405 )
beta        : -3.70791    ( 3.66556   3.51163 )
Epeak [keV] : 52.2665      ( -44.4733 87.5121 )
Norm@50keV   : 0.291302    ( -0.237866   17.2431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.75 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     55 degrees of freedom 
# Null hypothesis probability =   4.463356e-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]    : 13.5130  (-3.0961  4.31367)
R^2/D10^2   : 0.147567  (-0.0963245   0.239685)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.90 using 59 PHA bins.
# Reduced chi-squared =         0.9808 for     57 degrees of freedom 
# Null hypothesis probability =   5.162538e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.707e-09   3.432e-09
25- 50  2.048e-08   1.043e-08
50-150  2.416e-08   1.623e-08
15-150  5.035e-08   3.167e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 147.563       (-91.1006      -144.491)
Norm        : 3.59276       (-1.11153     1.80208)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.69 using 59 PHA bins.
# Reduced chi-squared =          1.012 for     57 degrees of freedom 
# Null hypothesis probability =   4.494385e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.240e-09   5.500e-09
25- 50  1.709e-08   1.001e-08
50-150  3.350e-08   2.175e-08
15-150  5.982e-08   3.669e-08
Double BB
R1^2/D10^2  : 4.41393E-05        (-4.41171e-05      -4.41171e-05)
kT2 [keV]   : 12.3561        (-2.87379      4.5661)
R2^2/D10^2  : 0.190048    (-0.127527   0.372306)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.85 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.07 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     55 degrees of freedom 
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.428547e-01
# Null hypothesis probability =   4.718968e-01
# Null hypothesis probability =   4.730527e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.526e-09   3.891e-09
25- 50  2.007e-08   1.252e-08
50-150  2.478e-08   1.669e-08
15-150  5.138e-08   3.248e-08
Plot creation:
Tue Oct 11 20:49:29 EDT 2016