batgrbproduct analysis for trigger=811074

batgrbproduct Analysis for Trigger=811074

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Feb 21 16:58:18 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger811074/batgroup_hand_proc
======================================================================

  Trigger: 00811074      Segment: 000

  BAT Trigger Time: 540887465.344   [s; MET]
      Trigger Stop: 540887481.728   [s; MET]
               UTC: 2018-02-21T06:30:44.832320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 326.772376374209   Dec: -72.8682959674159  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.01
     Image Trigger?:     NO
     Rate S/N Ratio:     9.59166304662544  [ if not an image trigger ]
     Image S/N Ratio:    7.01

  Flight Position:   [ source = BAT ]
    RA: 326.772376374209   Dec: -72.8682959674159  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 326.78701485979   Dec: -72.8909126255786  [deg; J2000]  
        { 21h 47m 08.9s , -72d 53' 27.3" }
         +/- 2.92319815061936 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.74848868825821 [arcmin] (formal 1-sigma fit error)
    SNR: 6.57062356294032
 
  Angular difference between Flight and Ground position is 1.381412 arcmin
 
  Partial Coding Fraction: 0.3125    [ including projection effects ]

  Duration
     T90: 11 +/- 3.16227766016838
        Measured from: 1.65600001811981
                   to: 12.6560000181198     [s; relative to TRIGTIME]
     T50: 7 +/- 3.60555127546399
        Measured from: 2.65600001811981
                   to: 9.65600001811981     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.65600001811981     
                   to: 3.65600001811981     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1.65600001811981     
                   to: 14.6560000181198     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.261867   0.365360   0.235548   0.031659
           0.059640   0.066344   0.059783   0.067162 [error]
 Peak      0.045751   0.045230   0.061815  -0.004705
           0.016544   0.019120   0.017315   0.019041 [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 9.58e-08 1.55e-07 1.90e-07 4.56e-07 5.70e-07 8.97e-07   erg/cm2
              Error 2.98e-08 3.22e-08 5.94e-08 2.95e-07 1.41e-07 3.52e-07   erg/cm2
Peak flux Power-law 5.01e-01 4.92e-01 3.38e-01 3.65e-01 1.48e+00 1.70e+00   ph/cm2/s
              Error 2.61e-01 1.65e-01 1.45e-01 3.22e-01 4.80e-01 5.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.62e-08 1.70e-07 1.95e-07 1.51e-07 5.38e-07 6.02e-07   erg/cm2
              Error 3.49e-08 4.28e-08 6.70e-08 3.65e-07 1.48e-07 4.01e-07   erg/cm2
Peak flux Cutoff-PL 4.09e-01 5.37e-01 3.70e-01 1.45e-01 1.42e+00 1.46e+00   ph/cm2/s
              Error 3.78e-01 2.08e-01 1.80e-01 2.26e-01 5.65e-01 8.18e-01   ph/cm2/s
 
Fluence        Band 8.58e-08 1.69e-07 1.94e-07 1.57e-07 5.39e-07 6.11e-07   erg/cm2
              Error -------- -------- 6.43e-08 -------- -------- --------   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    1.709    0.371    -      -           4.74e-03 1.11e-03   59.630 57
CPL   0.904    1.630      63.7    0.0      1.27e-02 6.66e-02   58.730 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    1.542    0.584    -      -           1.17e-02 4.01e-03   74.560 57
CPL   0.511    1.091      73.6   -8.2      3.80e-02 4.14e+02   74.170 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   13.000    1.656   14.656
T90    11.000    1.656   12.656
T50     7.000    2.656    9.656
Peak    1.000    2.656    3.656

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  326.7870   -72.8909   0.0292    41.6116   -43.2779         0.9432692      6.571 TRIG_00811074                 
 
Foreground time interval of the image:
  1.656  14.656 (delta_t =  13.000 [sec])
Background time interval of the image:
-239.344   1.656 (delta_t = 241.000 [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    1.656 sec. to   14.656 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70915     ( -0.356822   0.384639 )
Norm@50keV  : 4.74084E-03    ( -0.00112966   0.00109313 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.63 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     57 degrees of freedom 
# Null hypothesis probability =   3.800704e-01
 
Photon flux (15-150 keV)    in 13 sec: 0.631662 ( -0.131624  0.131711 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.70231e-07 ( -1.38391e-07  1.42834e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.656 sec. to   14.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.904459     ( -1.94356   1.31693 )
Epeak [keV] : 63.7076      ( -63.7082 -63.7082 )
Norm@50keV  : 1.27448E-02    ( -0.0127445   0.120426 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.73 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     56 degrees of freedom 
# Null hypothesis probability =   3.758154e-01
 
Photon flux (15-150 keV)    in 13 sec: 0.613600 ( -0.135549  0.13548 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.37718e-07 ( -1.41993e-07  1.53436e-07 ) ergs/cm2
 
Band function
Time interval is from    1.656 sec. to   14.656 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.907373   ( -1.15067   1.20065 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 63.3781      ( -31.6473 -63.443 )
Norm@50keV   : 1.27617E-02    ( -0.0127467   0.120303 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.73 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     55 degrees of freedom 
# Null hypothesis probability =   3.405298e-01
 
Photon flux (15-150 keV)    in 13 sec: 0.616718 ( 6.38328  -0.138833 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38963e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.0974  (-2.8615  3.66851)
R^2/D10^2   : 0.115116  (-0.0684199   0.16434)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.49 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     57 degrees of freedom 
# Null hypothesis probability =   2.876859e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.444e-08   2.365e-08
25- 50  1.890e-07   7.119e-08
50-150  2.059e-07   9.774e-08
15-150  4.493e-07   1.659e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 138.363       (-71.8875      -128.588)
Norm        : 2.54958       (-0.599631     0.915878)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.06 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     57 degrees of freedom 
# Null hypothesis probability =   4.000700e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.566e-08   5.010e-08
25- 50  1.569e-07   8.918e-08
50-150  2.991e-07   1.910e-07
15-150  5.417e-07   3.210e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.33603        (-2.92718      6.15139)
R1^2/D10^2  : 3.63112        (-3.45718      4838.44)
kT2 [keV]   : 17.0998        (-4.97772      18.0541)
R2^2/D10^2  : 3.75832E-02    (-0.0357451   0.105012)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.11 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.613623e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.167e-08   4.958e-08
25- 50  1.574e-07   8.164e-08
50-150  2.706e-07   1.654e-07
15-150  5.197e-07   2.792e-07

Peak spectrum fit

Power-law model
Time interval is from    2.656 sec. to    3.656 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54204     ( -0.558754   0.60911 )
Norm@50keV  : 1.16919E-02    ( -0.00409   0.00392876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.56 using 59 PHA bins.
# Reduced chi-squared =          1.308 for     57 degrees of freedom 
# Null hypothesis probability =   5.912293e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.47674 ( -0.479102  0.480246 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10196e-07 ( -4.02757e-08  4.16034e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.656 sec. to    3.656 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.510973     ( -0.499518   1.68185 )
Epeak [keV] : 73.5957      ( -57.0288 -73.3636 )
Norm@50keV  : 3.80039E-02    ( -0.0387788   827.505 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.17 using 59 PHA bins.
# Reduced chi-squared =          1.325 for     56 degrees of freedom 
# Null hypothesis probability =   5.242123e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.41686 ( -0.636521  0.49385 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04223e-07 ( -3.90061e-08  4.4406e-08 ) ergs/cm2
 
Band function
Time interval is from    2.656 sec. to    3.656 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.509054   ( 0.872274   3.31099 )
beta        : -9.99973    ( 9.99973   19.9997 )
Epeak [keV] : 73.5234      ( -49.5132 -73.5234 )
Norm@50keV   : 3.81197E-02    ( -0.0243349   2.12838 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.17 using 59 PHA bins.
# Reduced chi-squared =          1.349 for     55 degrees of freedom 
# Null hypothesis probability =   4.339286e-02
 
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]    : 15.5842  (-4.19323  6.30703)
R^2/D10^2   : 0.154607  (-0.154607   0.304594)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.65 using 59 PHA bins.
# Reduced chi-squared =          1.310 for     57 degrees of freedom 
# Null hypothesis probability =   5.837037e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.807e-09   5.050e-09
25- 50  3.211e-08   1.918e-08
50-150  5.394e-08   3.798e-08
15-150  9.386e-08   5.835e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.001       (-142.972      -199.036)
Norm        : 6.05108       (-1.93661     2.6233)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.38 using 59 PHA bins.
# Reduced chi-squared =          1.305 for     57 degrees of freedom 
# Null hypothesis probability =   6.088224e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.507e-08   9.265e-09
25- 50  2.899e-08   1.772e-08
50-150  6.353e-08   4.001e-08
15-150  1.076e-07   6.455e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.75079        (-2.7451      14.471)
R1^2/D10^2  : 89.5327        (-90.2141      -90.2141)
kT2 [keV]   : 17.4998        (-5.07913      10.0714)
R2^2/D10^2  : 9.48287E-02    (-0.0949707   0.232937)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.21 using 59 PHA bins.
# Reduced chi-squared =          1.313 for     55 degrees of freedom 
# Null hypothesis probability =   5.963946e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.543e-08   7.840e-09
25- 50  2.757e-08   1.691e-08
50-150  5.857e-08   3.862e-08
15-150  1.016e-07   5.940e-08
Plot creation:
Wed Feb 21 18:07:02 EST 2018