batgrbproduct analysis for trigger=811561

batgrbproduct Analysis for Trigger=811561

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Feb 25 18:46:20 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger811561/GCN5_download_cron
======================================================================

  Trigger: 00811561      Segment: 000

  BAT Trigger Time: 541203688.256   [s; MET]
      Trigger Stop: 541203689.28   [s; MET]
               UTC: 2018-02-24T22:21:07.725300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 202.661007449936   Dec: 38.088104423003  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.08
     Image Trigger?:     NO
     Rate S/N Ratio:     16.3095064303001  [ if not an image trigger ]
     Image S/N Ratio:    10.08

  Flight Position:   [ source = BAT ]
    RA: 202.661007449936   Dec: 38.088104423003  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 202.674566051699   Dec: 38.0730581131661  [deg; J2000]  
        { 13h 30m 41.9s , +38d 04' 23.0" }
         +/- 1.2807887471382 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.458723078119252 [arcmin] (formal 1-sigma fit error)
    SNR: 21.3589101891224
 
  Angular difference between Flight and Ground position is 1.106826 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 10.9160000085831 +/- 3.56897359184709
        Measured from: 0.144000053405762
                   to: 11.0600000619888     [s; relative to TRIGTIME]
     T50: 4.57999992370605 +/- 0.764010445403551
        Measured from: 1.3600001335144
                   to: 5.94000005722046     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.395999908447266     
                   to: 1.39599990844727     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.476000070571899     
                   to: 14.5719999074936     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.363201   0.390844   0.145293   0.055806
           0.025557   0.026781   0.023876   0.023387 [error]
 Peak      0.064973   0.067324   0.036436   0.010804
           0.007326   0.007608   0.006628   0.006063 [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 1.14e-07 1.45e-07 1.35e-07 2.20e-07 4.67e-07 6.13e-07   erg/cm2
              Error 1.36e-08 1.27e-08 2.22e-08 7.10e-08 4.98e-08 9.63e-08   erg/cm2
Peak flux Power-law 6.04e-01 4.81e-01 2.58e-01 2.02e-01 1.43e+00 1.54e+00   ph/cm2/s
              Error 1.08e-01 5.99e-02 5.40e-02 8.06e-02 1.78e-01 1.98e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.09e-07 1.55e-07 1.26e-07 7.12e-08 4.33e-07 4.60e-07   erg/cm2
              Error 1.51e-08 1.78e-08 2.79e-08 1.20e-07 6.22e-08 1.21e-07   erg/cm2
Peak flux Cutoff-PL 5.79e-01 5.12e-01 2.53e-01 9.42e-02 1.41e+00 1.44e+00   ph/cm2/s
              Error 1.18e-01 8.23e-02 6.14e-02 1.08e-01 1.82e-01 2.34e-01   ph/cm2/s
 
Fluence        Band 1.06e-07 1.57e-07 1.21e-07 1.31e-07 4.38e-07 5.16e-07   erg/cm2
              Error 1.52e-08 -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 5.71e-01 5.26e-01 2.43e-01 1.55e-01 1.42e+00 1.50e+00   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    2.105    0.175    -      -           3.34e-03 3.94e-04   37.800 57
CPL   1.492    0.732      32.3    0.0      7.78e-03 0.00e+00   35.930 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.899    0.234    -      -           1.00e-02 1.58e-03   48.730 57
CPL   1.377    0.934      48.7    0.0      2.03e-02 0.00e+00   47.820 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: 3.840000 sec.
T50 in the 50-300 keV band: 1.728000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   15.048   -0.476   14.572
T90    10.916    0.144   11.060
T50     4.580    1.360    5.940
Peak    1.000    0.396    1.396

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  202.6746 +38.0731 0.0090   19.4  -34.6       0.9243    21.4  TRIG_00811561       
------------------------------------------
 
Foreground time interval of the image:
 -0.476   9.045 (delta_t =   9.521 [sec])
Background time interval of the image:
-239.256 -166.036 (delta_t =  73.220 [sec])
-165.256  -0.476 (delta_t = 164.780 [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   -0.476 sec. to   14.572 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.10516     ( -0.170731   0.179838 )
Norm@50keV  : 3.33987E-03    ( -0.000397751   0.000390533 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.80 using 59 PHA bins.
# Reduced chi-squared =         0.6632 for     57 degrees of freedom 
# Null hypothesis probability =   9.765620e-01
 
Photon flux (15-150 keV)    in 15.05 sec: 0.526788 ( -0.0447867  0.0447922 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.67251e-07 ( -4.91983e-08  5.04768e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.476 sec. to   14.572 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49181     ( -0.957467   0.507295 )
Epeak [keV] : 32.3202      (   )
Norm@50keV  : 7.78156E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.93 using 59 PHA bins.
# Reduced chi-squared =         0.6416 for     56 degrees of freedom 
# Null hypothesis probability =   9.830557e-01
 
Photon flux (15-150 keV)    in 15.05 sec: 0.512014 ( -0.048103  0.048155 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.32964e-07 ( -5.95107e-08  6.48881e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.476 sec. to   14.572 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.49247   ( -3.42716   0.236775 )
beta        : -10.00000    ( 10   3.55271e-15 )
Epeak [keV] : 32.3095      ( -8.50132 17.7698 )
Norm@50keV   : 7.77284E-03    ( -0.000658304   0.0219675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.93 using 59 PHA bins.
# Reduced chi-squared =         0.6533 for     55 degrees of freedom 
# Null hypothesis probability =   9.782632e-01
 
Photon flux (15-150 keV)    in 15.05 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.38388e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.94735  (-0.831564  0.924804)
R^2/D10^2   : 0.367660  (-0.118006   0.172722)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.54 using 59 PHA bins.
# Reduced chi-squared =         0.9392 for     57 degrees of freedom 
# Null hypothesis probability =   6.057865e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.598e-08   1.245e-08
25- 50  1.811e-07   1.949e-08
50-150  6.785e-08   1.723e-08
15-150  3.349e-07   3.567e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 53.1100       (-12.0091      18.2329)
Norm        : 2.87324       (-0.408626     0.518621)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.02 using 59 PHA bins.
# Reduced chi-squared =         0.6319 for     57 degrees of freedom 
# Null hypothesis probability =   9.865176e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.071e-07   1.309e-08
25- 50  1.571e-07   1.452e-08
50-150  1.613e-07   3.981e-08
15-150  4.255e-07   5.230e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.21039        (-3.20888      1.65008)
R1^2/D10^2  : 1.13003        (-0.498543      8.4415)
kT2 [keV]   : 19.1187        (-10.3409      34.9841)
R2^2/D10^2  : 1.09193E-02    (-0.00647599   0.0661461)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.83 using 59 PHA bins.
# Reduced chi-squared =         0.6878 for     55 degrees of freedom 
# Null hypothesis probability =   9.626190e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.032e-07   4.792e-08
25- 50  1.551e-07   6.180e-08
50-150  1.634e-07   8.938e-08
15-150  4.217e-07   1.733e-07

Peak spectrum fit

Power-law model
Time interval is from    0.396 sec. to    1.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89880     ( -0.227436   0.241371 )
Norm@50keV  : 9.99861E-03    ( -0.00159958   0.00155719 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.73 using 59 PHA bins.
# Reduced chi-squared =         0.8550 for     57 degrees of freedom 
# Null hypothesis probability =   7.739822e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.43417 ( -0.178293  0.178295 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.19229e-08 ( -1.416e-08  1.4593e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.396 sec. to    1.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37669     ( -1.15883   0.70943 )
Epeak [keV] : 48.7259      (   )
Norm@50keV  : 2.02885E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.82 using 59 PHA bins.
# Reduced chi-squared =         0.8539 for     56 degrees of freedom 
# Null hypothesis probability =   7.734487e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.40664 ( -0.18016  0.18416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.63832e-08 ( -1.62261e-08  1.73488e-08 ) ergs/cm2
 
Band function
Time interval is from    0.396 sec. to    1.396 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.846027   ( -0.821629   -0.821629 )
beta        : -2.14089    ( -5.44049   0.384497 )
Epeak [keV] : 29.1823      ( -29.1399 207.012 )
Norm@50keV   : 0.861160    ( -0.749533   651.561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.14 using 59 PHA bins.
# Reduced chi-squared =         0.8571 for     55 degrees of freedom 
# Null hypothesis probability =   7.654187e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.41558 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.83252e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.81837  (-1.41847  1.69122)
R^2/D10^2   : 0.722211  (-0.326351   0.58354)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.58 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     57 degrees of freedom 
# Null hypothesis probability =   3.820289e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.409e-08   3.094e-09
25- 50  3.412e-08   5.985e-09
50-150  1.688e-08   5.769e-09
15-150  6.509e-08   1.103e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 75.4479       (-25.8291      52.2654)
Norm        : 6.88581       (-1.20381     1.51973)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.82 using 59 PHA bins.
# Reduced chi-squared =         0.8389 for     57 degrees of freedom 
# Null hypothesis probability =   8.017763e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.779e-08   3.065e-09
25- 50  2.887e-08   4.670e-09
50-150  3.914e-08   2.034e-08
15-150  8.580e-08   2.324e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.13848        (-2.00363      2.15956)
R1^2/D10^2  : 3.01233        (-1.88101      8.83612)
kT2 [keV]   : 20.6243        (-7.42009      25.8158)
R2^2/D10^2  : 2.87130E-02    (-0.0265022   0.143868)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.17 using 59 PHA bins.
# Reduced chi-squared =         0.8577 for     55 degrees of freedom 
# Null hypothesis probability =   7.644036e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.790e-08   1.035e-08
25- 50  2.813e-08   1.487e-08
50-150  3.904e-08   2.307e-08
15-150  8.507e-08   4.528e-08
Plot creation:
Sun Feb 25 18:51:30 EST 2018