batgrbproduct analysis for trigger=927825

batgrbproduct Analysis for Trigger=927825

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Oct  5 22:58:43 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger927825/GCN5_download_cron
======================================================================

  Trigger: 00927825      Segment: 000

  BAT Trigger Time: 591905246.556   [s; MET]
      Trigger Stop: 591905246.62   [s; MET]
               UTC: 2019-10-04T18:07:02.863100    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 31.7210640523513   Dec: -36.9316566745842  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.12
     Image Trigger?:     NO
     Rate S/N Ratio:     32.832910318764  [ if not an image trigger ]
     Image S/N Ratio:    9.12

  Flight Position:   [ source = BAT ]
    RA: 31.7210640523513   Dec: -36.9316566745842  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 31.713968837788   Dec: -36.9309257572541  [deg; J2000]  
        { 02h 06m 51.4s , -36d 55' 51.3" }
         +/- 1.07558960845882 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.34558047786487 [arcmin] (formal 1-sigma fit error)
    SNR: 27.4099948940422
 
  Angular difference between Flight and Ground position is 0.343111 arcmin
 
  Partial Coding Fraction: 0.2617188    [ including projection effects ]

  Duration
     T90: 2.44399988651276 +/- 0.0823651038377751
        Measured from: -0.0119998455047607
                   to: 2.432000041008     [s; relative to TRIGTIME]
     T50: 1.77599990367889 +/- 0.0651152861923527
        Measured from: 0.220000147819519
                   to: 1.99600005149841     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0920000076293945     
                   to: 0.907999992370605     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0920000076293945     
                   to: 2.57599997520447     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.418006   0.642487   0.618673   0.149051
           0.026401   0.030311   0.028492   0.018941 [error]
 Peak      0.228852   0.328242   0.313182   0.062057
           0.017897   0.020622   0.019031   0.011693 [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 1.43e-07 2.88e-07 4.52e-07 1.57e-06 1.26e-06 2.45e-06   erg/cm2
              Error 1.30e-08 1.59e-08 2.67e-08 2.02e-07 6.70e-08 2.19e-07   erg/cm2
Peak flux Power-law 2.54e+00 2.58e+00 1.85e+00 2.12e+00 7.80e+00 9.09e+00   ph/cm2/s
              Error 2.80e-01 1.83e-01 1.46e-01 3.28e-01 5.24e-01 5.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.34e-07 2.96e-07 4.67e-07 1.06e-06 1.24e-06 1.96e-06   erg/cm2
              Error 1.59e-08 1.81e-08 3.15e-08 4.43e-07 6.94e-08 4.12e-07   erg/cm2
Peak flux Cutoff-PL 2.23e+00 2.75e+00 2.01e+00 1.15e+00 7.67e+00 8.13e+00   ph/cm2/s
              Error 3.37e-01 2.18e-01 1.80e-01 4.45e-01 5.32e-01 6.84e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 2.26e+00 2.73e+00 1.99e+00 1.27e+00 7.70e+00 8.27e+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    1.350    0.084    -      -           4.83e-02 2.38e-03   56.430 57
CPL   1.048    0.332     174.2  -55.0      6.68e-02 2.36e-02   53.780 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.481    0.104    -      -           6.28e-02 4.14e-03   76.090 57
CPL   0.807    0.449      93.7   43.9      1.34e-01 6.97e-02   68.550 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: 2.432000 sec.
T50 in the 50-300 keV band: 1.792000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.668   -0.092    2.576
T90     2.444   -0.012    2.432
T50     1.776    0.220    1.996
Peak    1.000   -0.092    0.908

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   31.7140 -36.9309 0.0070   36.0  117.8       1.9041    27.4  TRIG_00927825       
------------------------------------------
 
Foreground time interval of the image:
 -0.092   2.576 (delta_t =   2.668 [sec])
Background time interval of the image:
-239.556  -0.092 (delta_t = 239.464 [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   -0.092 sec. to    2.576 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35045     ( -0.0837854   0.0837714 )
Norm@50keV  : 4.82884E-02    ( -0.00237723   0.002377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.43 using 59 PHA bins.
# Reduced chi-squared =         0.9899 for     57 degrees of freedom 
# Null hypothesis probability =   4.965820e-01
 
Photon flux (15-150 keV)    in 2.668 sec: 5.81791 ( -0.300075  0.300473 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25816e-06 ( -6.69284e-08  6.70647e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.092 sec. to    2.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04802     ( -0.340877   0.3225 )
Epeak [keV] : 174.206      ( -64.2483 -174.206 )
Norm@50keV  : 6.68402E-02    ( -0.0188794   0.0284049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.78 using 59 PHA bins.
# Reduced chi-squared =         0.9603 for     56 degrees of freedom 
# Null hypothesis probability =   5.594351e-01
 
Photon flux (15-150 keV)    in 2.668 sec: 5.74744 ( -0.30704  0.30885 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24381e-06 ( -6.95121e-08  6.93733e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.092 sec. to    2.576 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.04804   ( -1.53656   -1.53656 )
beta        : -10.0000    ( 10   5.32907e-15 )
Epeak [keV] : 174.190      ( -52.358 -174.19 )
Norm@50keV   : 6.68324E-02    ( -0.0188261   0.0284317 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.78 using 59 PHA bins.
# Reduced chi-squared =         0.9778 for     55 degrees of freedom 
# Null hypothesis probability =   5.213931e-01
 
Photon flux (15-150 keV)    in 2.668 sec: 5.76962 (    ) 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]    : 18.2348  (  )
R^2/D10^2   : 0.353345  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         142.30 using 59 PHA bins.
# Reduced chi-squared =         2.4964 for     57 degrees of freedom 
# Null hypothesis probability =   3.041791e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.250e-08   6.083e-09
25- 50  2.918e-07   1.814e-08
50-150  7.067e-07   5.723e-08
15-150  1.061e-06   6.350e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-10.985      -200)
Norm        : 24.3185       (-1.20546     1.20546)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.75 using 59 PHA bins.
# Reduced chi-squared =          1.276 for     57 degrees of freedom 
# Null hypothesis probability =   7.803005e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.616e-07   8.711e-09
25- 50  3.109e-07   1.601e-08
50-150  6.818e-07   3.508e-08
15-150  1.154e-06   6.643e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.91654        (-1.15477      1.39584)
R1^2/D10^2  : 5.41008        (-2.46531      4.98702)
kT2 [keV]   : 27.4565        (-3.27915      4.82938)
R2^2/D10^2  : 7.38964E-02    (-0.0323722   0.0432822)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.74 using 59 PHA bins.
# Reduced chi-squared =         0.9588 for     55 degrees of freedom 
# Null hypothesis probability =   5.616154e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.341e-07   2.623e-08
25- 50  2.921e-07   4.369e-08
50-150  8.211e-07   1.230e-07
15-150  1.247e-06   1.597e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.092 sec. to    0.908 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48147     ( -0.103456   0.104209 )
Norm@50keV  : 6.28069E-02    ( -0.00414166   0.0041357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.09 using 59 PHA bins.
# Reduced chi-squared =          1.335 for     57 degrees of freedom 
# Null hypothesis probability =   4.634463e-02
 
Photon flux (15-150 keV)    in 1 sec: 7.80235 ( -0.524167  0.524641 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.97667e-07 ( -4.2287e-08  4.23955e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.092 sec. to    0.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.807002     ( -0.469412   0.428604 )
Epeak [keV] : 93.6564      ( -19.2421 68.4697 )
Norm@50keV  : 0.134307    ( -0.0503898   0.0890064 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.55 using 59 PHA bins.
# Reduced chi-squared =          1.224 for     56 degrees of freedom 
# Null hypothesis probability =   1.211202e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.66653 ( -0.53204  0.53218 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.84885e-07 ( -4.366e-08  4.3667e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.092 sec. to    0.908 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.807158   ( -0.333652   0.554366 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 93.6510      ( -14.6781 68.4575 )
Norm@50keV   : 0.134278    ( -0.0503378   0.0891062 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.55 using 59 PHA bins.
# Reduced chi-squared =          1.246 for     55 degrees of freedom 
# Null hypothesis probability =   1.035742e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.69937 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.84588e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 16.5240  (-1.22817  1.31692)
R^2/D10^2   : 0.668278  (-0.159032   0.207626)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         111.82 using 59 PHA bins.
# Reduced chi-squared =         1.9617 for     57 degrees of freedom 
# Null hypothesis probability =   1.983184e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.744e-08   4.470e-09
25- 50  1.619e-07   1.470e-08
50-150  3.126e-07   3.685e-08
15-150  5.119e-07   3.900e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-32.5035      -200)
Norm        : 32.2781       (-2.10285     2.10285)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.76 using 59 PHA bins.
# Reduced chi-squared =          1.277 for     57 degrees of freedom 
# Null hypothesis probability =   7.780752e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.067e-08   6.095e-09
25- 50  1.552e-07   1.310e-08
50-150  3.403e-07   6.145e-08
15-150  5.762e-07   8.365e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.23621        (-1.29862      1.62304)
R1^2/D10^2  : 10.1821        (-5.51442      14.052)
kT2 [keV]   : 22.7064        (-2.75232      4.04258)
R2^2/D10^2  : 0.180634    (-0.0858156   0.118726)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.65 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     55 degrees of freedom 
# Null hypothesis probability =   1.541292e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.249e-08   3.039e-08
25- 50  1.516e-07   2.920e-08
50-150  3.588e-07   7.445e-08
15-150  5.829e-07   1.164e-07
Plot creation:
Sat Oct  5 23:03:14 EDT 2019