batgrbproduct analysis for trigger=850471

batgrbproduct Analysis for Trigger=850471

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Jul 29 18:51:36 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger850471/GCN5_download_cron
======================================================================

  Trigger: 00850471      Segment: 000

  BAT Trigger Time: 554491762.048   [s; MET]
      Trigger Stop: 554491762.56   [s; MET]
               UTC: 2018-07-28T17:29:00.710460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 253.569321153668   Dec: -54.0307606838017  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.51
     Image Trigger?:     NO
     Rate S/N Ratio:     19.6468827043885  [ if not an image trigger ]
     Image S/N Ratio:    10.51

  Flight Position:   [ source = BAT ]
    RA: 253.569321153668   Dec: -54.0307606838017  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 253.573584557955   Dec: -54.0371485825289  [deg; J2000]  
        { 16h 54m 17.7s , -54d 02' 13.7" }
         +/- 0.49858806055036 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.161335944158228 [arcmin] (formal 1-sigma fit error)
    SNR: 82.2083065788685
 
  Angular difference between Flight and Ground position is 0.411667 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 8.6839998960495 +/- 0.297321378474679
        Measured from: 11.672000169754
                   to: 20.3560000658035     [s; relative to TRIGTIME]
     T50: 2.46399998664856 +/- 0.035777160144337
        Measured from: 12.6840001344681
                   to: 15.1480001211166     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.6119999885559     
                   to: 13.6119999885559     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.24399995803833     
                   to: 36.5119999647141     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    18.316513  20.132249  11.805705   2.307314
           0.102586   0.106955   0.087485   0.057003 [error]
 Peak      4.769409   5.525579   3.452957   0.768666
           0.046120   0.049667   0.040898   0.022944 [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 6.50e-06 8.98e-06 9.15e-06 1.70e-05 3.01e-05 4.16e-05   erg/cm2
              Error 2.00e-07 1.61e-07 1.29e-07 5.62e-07 4.13e-07 6.06e-07   erg/cm2
Peak flux Power-law 5.49e+01 4.42e+01 2.40e+01 1.91e+01 1.32e+02 1.42e+02   ph/cm2/s
              Error 1.96e+00 9.28e-01 4.23e-01 7.42e-01 2.86e+00 2.71e+00   ph/cm2/s
 
Fluence   Cutoff-PL 6.37e-06 8.98e-06 9.22e-06 1.60e-05 2.99e-05 4.05e-05   erg/cm2
              Error 2.85e-07 1.62e-07 1.59e-07 1.42e-06 4.39e-07 1.59e-06   erg/cm2
Peak flux Cutoff-PL 5.37e+01 4.41e+01 2.42e+01 1.82e+01 1.31e+02 1.40e+02   ph/cm2/s
              Error 2.60e+00 8.09e-01 4.91e-01 1.44e+00 3.40e+00 3.75e+00   ph/cm2/s
 
Fluence        Band 6.01e-06 9.00e-06 9.14e-06 1.68e-05 2.96e-05 4.11e-05   erg/cm2
              Error -------- -------- 1.29e-07 -------- 5.77e-07 --------   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    1.972    0.026    -      -           8.88e-02 1.19e-03   44.780 57
CPL   1.908    0.101      88.3  -31.9      9.43e-02 6.82e-03   43.620 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.879    0.031    -      -           9.25e-01 1.48e-02   42.740 57
CPL   1.860    0.084     429.6    0.0      9.43e-01 0.00e+00   42.660 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: 7.104000 sec.
T50 in the 50-300 keV band: 2.176000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   36.756   -0.244   36.512
T90     8.684   11.672   20.356
T50     2.464   12.684   15.148
Peak    1.000   12.612   13.612

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  253.5736 -54.0371 0.0023   35.8   15.4      54.2268    82.2  TRIG_00850471       
------------------------------------------
 
Foreground time interval of the image:
 -0.244  36.512 (delta_t =  36.756 [sec])
Background time interval of the image:
-239.048  -0.244 (delta_t = 238.804 [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   -0.244 sec. to   36.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97202     ( -0.0256501   0.0256072 )
Norm@50keV  : 8.88161E-02    ( -0.00119411   0.00119247 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.78 using 59 PHA bins.
# Reduced chi-squared =         0.7857 for     57 degrees of freedom 
# Null hypothesis probability =   8.798676e-01
 
Photon flux (15-150 keV)    in 36.76 sec: 13.1539 ( -0.260318  0.262125 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.00691e-05 ( -4.12925e-07  4.13256e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.244 sec. to   36.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90813     ( -0.102506   0.100385 )
Epeak [keV] : 88.3305      ( -24.6098 -88.3306 )
Norm@50keV  : 9.42723E-02    ( -0.00443196   0.00919972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.62 using 59 PHA bins.
# Reduced chi-squared =         0.7789 for     56 degrees of freedom 
# Null hypothesis probability =   8.858873e-01
 
Photon flux (15-150 keV)    in 36.76 sec: 13.0270 ( -0.3197  0.3249 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99426e-05 ( -4.63691e-07  4.13918e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.244 sec. to   36.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.73893E-02   ( -0.614187   4.21807 )
beta        : -1.98119    ( -0.0282789   0.027611 )
Epeak [keV] : 25.9181      ( -24.5684 49.5666 )
Norm@50keV   : 2.16469    ( -2.1637   15427.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.05 using 59 PHA bins.
# Reduced chi-squared =         0.7645 for     55 degrees of freedom 
# Null hypothesis probability =   9.001951e-01
 
Photon flux (15-150 keV)    in 36.76 sec: 12.7740 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.96356e-05 ( -2.96353e-05  -5.84337e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 16.8299  (  )
R^2/D10^2   : 0.737067  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1653.43 using 59 PHA bins.
# Reduced chi-squared =        29.0075 for     57 degrees of freedom 
# Null hypothesis probability =  2.796391e-308
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.567e-06   5.110e-08
25- 50  6.879e-06   1.470e-07
50-150  1.387e-05   2.445e-07
15-150  2.231e-05   2.867e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 117.145       (      )
Norm        : 49.0166       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         144.98 using 59 PHA bins.
# Reduced chi-squared =         2.5435 for     57 degrees of freedom 
# Null hypothesis probability =   1.314105e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.698e-06   2.040e-07
25- 50  8.368e-06   2.647e-07
50-150  1.476e-05   2.724e-06
15-150  2.782e-05   2.819e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.17215        (-0.29172      0.300952)
R1^2/D10^2  : 14.7977        (-2.29042      2.79472)
kT2 [keV]   : 26.2543        (-0.943512      1.03951)
R2^2/D10^2  : 0.106271    (-0.0153498   0.0170241)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.79 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     55 degrees of freedom 
# Null hypothesis probability =   4.081206e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.062e-06   2.481e-07
25- 50  9.258e-06   1.967e-07
50-150  1.461e-05   2.849e-07
15-150  2.893e-05   4.779e-07

Peak spectrum fit

Power-law model
Time interval is from   12.612 sec. to   13.612 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87898     ( -0.0310344   0.0310362 )
Norm@50keV  : 0.925113    ( -0.0147608   0.0147548 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.74 using 59 PHA bins.
# Reduced chi-squared =         0.7499 for     57 degrees of freedom 
# Null hypothesis probability =   9.196350e-01
 
Photon flux (15-150 keV)    in 1 sec: 131.594 ( -2.8529  2.87156 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.5045e-06 ( -1.35625e-07  1.35655e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   12.612 sec. to   13.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85965     ( -0.119849   0.0479548 )
Epeak [keV] : 429.637      (   )
Norm@50keV  : 0.942785    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.66 using 59 PHA bins.
# Reduced chi-squared =         0.7619 for     56 degrees of freedom 
# Null hypothesis probability =   9.053200e-01
 
Photon flux (15-150 keV)    in 1 sec: 130.517 131.507 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.20564e-11 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   12.612 sec. to   13.612 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.805055   ( -4.75975   -1.87179 )
beta        : -1.89234    ( -0.0342538   0.0336286 )
Epeak [keV] : 25.7067      ( -5.8612 11.7167 )
Norm@50keV   : 92.1892    ( -92.1425   98396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.15 using 59 PHA bins.
# Reduced chi-squared =         0.7118 for     55 degrees of freedom 
# Null hypothesis probability =   9.475724e-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]    : 16.2193  (  )
R^2/D10^2   : 9.09228  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1163.56 using 59 PHA bins.
# Reduced chi-squared =        20.4133 for     57 degrees of freedom 
# Null hypothesis probability =  4.262502e-206
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.930e-07   1.685e-08
25- 50  2.099e-06   5.450e-08
50-150  3.879e-06   9.850e-08
15-150  6.471e-06   1.080e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 122.287       (-10.4058      6.6534)
Norm        : 517.604       (-11.5967     19.651)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.88 using 59 PHA bins.
# Reduced chi-squared =          1.717 for     57 degrees of freedom 
# Null hypothesis probability =   6.158869e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.347e-06   6.300e-08
25- 50  2.418e-06   8.200e-08
50-150  4.355e-06   8.320e-07
15-150  8.120e-06   8.495e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.17193        (-0.353672      0.368026)
R1^2/D10^2  : 147.065        (-26.2523      33.171)
kT2 [keV]   : 27.1008        (-1.28881      1.4625)
R2^2/D10^2  : 1.04901    (-0.192516   0.22034)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.52 using 59 PHA bins.
# Reduced chi-squared =          1.046 for     55 degrees of freedom 
# Null hypothesis probability =   3.821094e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.373e-06   8.000e-08
25- 50  2.542e-06   7.000e-08
50-150  4.372e-06   1.205e-07
15-150  8.288e-06   1.820e-07
Plot creation:
Sun Jul 29 18:55:39 EDT 2018