batgrbproduct analysis for trigger=994727

batgrbproduct Analysis for Trigger=994727

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Sep  6 17:15:26 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger994727/GCN5_download_cron
======================================================================

  Trigger: 00994727      Segment: 000

  BAT Trigger Time: 620993136.512   [s; MET]
      Trigger Stop: 620993140.608   [s; MET]
               UTC: 2020-09-05T10:05:10.930480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 243.044760527211   Dec: -52.7189321845051  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.21
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8452325786651  [ if not an image trigger ]
     Image S/N Ratio:    8.21

  Flight Position:   [ source = BAT ]
    RA: 243.044760527211   Dec: -52.7189321845051  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 242.988701474548   Dec: -52.6820110202254  [deg; J2000]  
        { 16h 11m 57.3s , -52d 40' 55.2" }
         +/- 2.45912275772885 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.57055913097378 [arcmin] (formal 1-sigma fit error)
    SNR: 8.41125769474047
 
  Angular difference between Flight and Ground position is 3.010293 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 6.15600001811981 +/- 0.792949013830368
        Measured from: -0.443999886512756
                   to: 5.71200013160706     [s; relative to TRIGTIME]
     T50: 3.54399991035461 +/- 1.44904932573659
        Measured from: 0.976000189781189
                   to: 4.5200001001358     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.741999983787537     
                   to: 0.258000016212463     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.70799994468689     
                   to: 5.99600005149841     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.382072   0.002994  -0.003418   0.020827
           0.030405   0.025355   0.021917   0.021518 [error]
 Peak      0.057852  -0.000682   0.006330   0.011959
           0.011864   0.009920   0.008417   0.008282 [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 1.18e-07 2.49e-08 2.63e-09 3.05e-10 1.46e-07 1.46e-07   erg/cm2
              Error 1.99e-08 1.08e-08 3.06e-09 5.97e-10 2.76e-08 2.77e-08   erg/cm2
Peak flux Power-law 6.13e-01 6.09e-02 2.45e-03 1.03e-04 6.76e-01 6.76e-01   ph/cm2/s
              Error 2.27e-01 7.76e-02 9.73e-03 1.42e-03 2.78e-01 2.78e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.26e-07 1.76e-08 4.66e-11 1.29e-16 1.44e-07 1.44e-07   erg/cm2
              Error 2.17e-08 1.20e-08 1.05e-09 4.08e-11 2.49e-08 2.49e-08   erg/cm2
Peak flux Cutoff-PL 6.14e-01 6.03e-02 2.37e-03 9.26e-05 6.74e-01 6.75e-01   ph/cm2/s
              Error 2.41e-01 7.75e-02 7.64e-03 1.40e-03 2.80e-01 2.78e-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    5.244    0.750    -      -           3.55e-04 2.78e-04   53.350 57
CPL   1.000    0.000      50.0    0.0      5.47e-03 0.00e+00  131.280 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    5.633    2.336    -      -           2.37e-04 6.62e-04   78.290 57
CPL   1.000    0.000      50.0    0.0      7.78e-03 0.00e+00   94.840 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    6.704   -0.708    5.996
T90     6.156   -0.444    5.712
T50     3.544    0.976    4.520
Peak    1.000   -0.742    0.258

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  242.9887 -52.6820 0.0229   36.9  173.2       0.4255     8.4  TRIG_00994727       
------------------------------------------
 
Foreground time interval of the image:
 -0.708   5.996 (delta_t =   6.704 [sec])
Background time interval of the image:
-239.512 -140.012 (delta_t =  99.500 [sec])
-138.512  -0.708 (delta_t = 137.804 [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   -0.708 sec. to    5.996 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.24361     ( -0.69008   0.809822 )
Norm@50keV  : 3.54556E-04    ( -0.000206893   0.000349455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.35 using 59 PHA bins.
# Reduced chi-squared =         0.9360 for     57 degrees of freedom 
# Null hypothesis probability =   6.128177e-01
 
Photon flux (15-150 keV)    in 6.704 sec: 0.691490 ( -0.118834  0.119005 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45663e-07 ( -2.72086e-08  2.80014e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.708 sec. to    5.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 5.46846E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         131.28 using 59 PHA bins.
# Reduced chi-squared =         2.3443 for     56 degrees of freedom 
# Null hypothesis probability =   5.522337e-08
 
Photon flux (15-150 keV)    in 6.704 sec: 0.704463 ( -0.116888  0.11692 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4382e-07 ( -2.46908e-08  2.51876e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.708 sec. to    5.996 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.76344   ( 8.76344   8.76344 )
beta        : -5.25936    ( -0.797367   0.703398 )
Epeak [keV] : 2.27143      ( -2.27143 -2.27143 )
Norm@50keV   : 4.73848E-02    ( -0.0276097   0.0480186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.35 using 59 PHA bins.
# Reduced chi-squared =         0.9700 for     55 degrees of freedom 
# Null hypothesis probability =   5.378757e-01
 
Photon flux (15-150 keV)    in 6.704 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]    : 2.89021  (-0.431677  0.497949)
R^2/D10^2   : 128.252  (-128.252   262.969)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.10 using 59 PHA bins.
# Reduced chi-squared =         0.8789 for     57 degrees of freedom 
# Null hypothesis probability =   7.296186e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.270e-07   7.113e-08
25- 50  1.623e-08   9.886e-09
50-150  1.920e-11   2.048e-11
15-150  1.433e-07   7.951e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 5.56206       (-1.21259      1.59969)
Norm        : 112.811       (-60.9323     159.103)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.29 using 59 PHA bins.
# Reduced chi-squared =         0.8823 for     57 degrees of freedom 
# Null hypothesis probability =   7.230558e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.246e-07   5.691e-08
25- 50  1.985e-08   1.189e-08
50-150  1.715e-10   1.743e-10
15-150  1.446e-07   7.354e-08
Double BB
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.10 using 59 PHA bins.
#Fit statistic : Chi-Squared =          49.93 using 59 PHA bins.
#Fit statistic : Chi-Squared =          49.87 using 59 PHA bins.
#Fit statistic : Chi-Squared =          49.86 using 59 PHA bins.
# Reduced chi-squared =         0.9108 for     55 degrees of freedom 
# Reduced chi-squared =         0.9077 for     55 degrees of freedom 
# Reduced chi-squared =         0.9068 for     55 degrees of freedom 
# Reduced chi-squared =         0.9065 for     55 degrees of freedom 
# Null hypothesis probability =   6.621014e-01
# Null hypothesis probability =   6.683680e-01
# Null hypothesis probability =   6.703640e-01
# Null hypothesis probability =   6.709149e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model
Time interval is from   -0.742 sec. to    0.258 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.63349     ( -1.71063   2.96079 )
Norm@50keV  : 2.36779E-04    ( -0.000236777   0.00108669 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.29 using 59 PHA bins.
# Reduced chi-squared =          1.374 for     57 degrees of freedom 
# Null hypothesis probability =   3.215950e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.676309 ( -0.28185  0.274412 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.072e-08 ( -9.62194e-09  1.05717e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.742 sec. to    0.258 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 7.77707E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          94.84 using 59 PHA bins.
# Reduced chi-squared =          1.694 for     56 degrees of freedom 
# Null hypothesis probability =   9.171131e-04
 
Photon flux (15-150 keV)    in 1 sec: 0.674198 ( -0.280009  0.280336 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.06296e-08 ( -9.4435e-09  1.0499e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.742 sec. to    0.258 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.38749   (     )
beta        : -5.33565    (     )
Epeak [keV] : 4.00936      (   )
Norm@50keV   : 4.47125E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.36 using 59 PHA bins.
# Reduced chi-squared =          1.425 for     55 degrees of freedom 
# Null hypothesis probability =   2.097893e-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]    : 2.52868  (-1.03954  1.39978)
R^2/D10^2   : 314.340  (-316.475   24730.1)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.95 using 59 PHA bins.
# Reduced chi-squared =          1.385 for     57 degrees of freedom 
# Null hypothesis probability =   2.872467e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.873e-08   1.056e-08
25- 50  1.441e-09   9.915e-10
50-150  5.088e-13   6.745e-13
15-150  2.017e-08   1.241e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.81923       (-2.50605      4.52184)
Norm        : 183.137       (-183.137     5595.28)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.47 using 59 PHA bins.
# Reduced chi-squared =          1.377 for     57 degrees of freedom 
# Null hypothesis probability =   3.118872e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.854e-08   1.109e-08
25- 50  2.153e-09   1.529e-09
50-150  9.237e-12   1.256e-11
15-150  2.070e-08   1.288e-08
Double BB
R1^2/D10^2  : 333.084        (-310.01      24273.1)
kT2 [keV]   : 199.363        (-199.363      -199.363)
R2^2/D10^2  : 8.95438E-05    (-7.01053e-05   0.00229972)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.16 using 59 PHA bins.
#Fit statistic : Chi-Squared =          74.94 using 59 PHA bins.
#Fit statistic : Chi-Squared =          74.63 using 59 PHA bins.
# Reduced chi-squared =          1.366 for     55 degrees of freedom 
# Reduced chi-squared =          1.363 for     55 degrees of freedom 
# Reduced chi-squared =          1.357 for     55 degrees of freedom 
# Null hypothesis probability =   3.679975e-02
# Null hypothesis probability =   3.815707e-02
# Null hypothesis probability =   4.024503e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.875e-08   1.100e-08
25- 50  3.671e-09   1.975e-09
50-150  2.282e-08   6.745e-09
15-150  4.523e-08   1.431e-08
Plot creation:
Sun Sep  6 17:25:56 EDT 2020