batgrbproduct analysis for trigger=957271

batgrbproduct Analysis for Trigger=957271

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Feb 19 19:38:43 EST 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger957271
======================================================================

  Trigger: 00957271      Segment: 000

  BAT Trigger Time: 603790633.6   [s; MET]
      Trigger Stop: 603790633.856   [s; MET]
               UTC: 2020-02-19T07:36:49.139100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 342.644409036627   Dec: -59.1083992201985  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.23
     Image Trigger?:     NO
     Rate S/N Ratio:     97.4320275884681  [ if not an image trigger ]
     Image S/N Ratio:    13.23

  Flight Position:   [ source = BAT ]
    RA: 342.644409036627   Dec: -59.1083992201985  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 342.594694865084   Dec: -59.1012457317369  [deg; J2000]  
        { 22h 50m 22.7s , -59d 06' 04.5" }
         +/- 2.3689526956136 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.07910232751214 [arcmin] (formal 1-sigma fit error)
    SNR: 8.8723328216173
 
  Angular difference between Flight and Ground position is 1.590605 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 81.328 +/- 9.97851458874499
        Measured from: -0.016
                   to: 81.312     [s; relative to TRIGTIME]
     T50: 58.768 +/- 13.4595119004626
        Measured from: 0.416
                   to: 59.184     [s; relative to TRIGTIME]



======================================================================
 
=== 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 9.65e-08 1.80e-07 2.59e-07 7.93e-07 7.37e-07 1.33e-06   erg/cm2
              Error 2.26e-08 2.48e-08 4.71e-08 3.21e-07 1.12e-07 3.55e-07   erg/cm2
Peak flux Power-law 4.20e-01 6.68e-01 8.03e-01 1.89e+00 2.43e+00 3.78e+00   ph/cm2/s
              Error 7.12e-02 6.77e-02 6.15e-02 3.34e-01 1.81e-01 3.46e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.65e-08 1.76e-07 2.56e-07 8.78e-07 7.42e-07 1.30e-06   erg/cm2
              Error -------- 3.78e-08 -------- 3.41e-07 1.55e-07 4.33e-07   erg/cm2
Peak flux Cutoff-PL 4.19e-01 6.67e-01 7.97e-01 2.10e+00 2.44e+00 3.96e+00   ph/cm2/s
              Error -------- 7.64e-02 7.32e-02 -------- 2.07e-01 5.07e-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    1.472    0.250    -      -           8.90e-04 1.21e-04   61.740 57
CPL   1.472    0.327    9999.2    0.0      8.92e-04 8.46e-04   61.750 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.735    0.137    -      -           2.11e-02 1.62e-03   54.530 57
CPL   0.732    0.165    9999.3    0.0      2.13e-02 5.13e-03   54.560 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: 0.512000 sec.
T50 in the 50-300 keV band: 0.256000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   86.928   -0.223    86.704
T90    81.328   -0.016    81.312
T50    58.768    0.416    59.184
Peak    1.000   -0.268     0.732

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  342.5947   -59.1012   0.0218    17.4796    -0.9238         0.5972333      8.872 TRIG_00957271                 
 
Foreground time interval of the image:
-15.600  15.501 (delta_t =  31.101 [sec])
Background time interval of the image:
-116.099 -15.600 (delta_t = 100.499 [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)

Spectral Evolution

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model
Time interval is from   -0.224 sec. to   86.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47227     ( -0.247854   0.251177 )
Norm@50keV  : 8.89532E-04    ( -0.000121251   0.000119851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.74 using 59 PHA bins.
# Reduced chi-squared =          1.083 for     57 degrees of freedom 
# Null hypothesis probability =   3.105989e-01
 
Photon flux (15-150 keV)    in 86.93 sec: 0.110244 ( -0.0146833  0.014725 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.37106e-07 ( -1.11588e-07  1.1317e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.224 sec. to   86.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47229     ( -0.404605   0.250167 )
Epeak [keV] : 9999.19      ( -9999.35 -9999.35 )
Norm@50keV  : 8.91871E-04    ( -0.000891933   0.000800792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.75 using 59 PHA bins.
# Reduced chi-squared =          1.103 for     56 degrees of freedom 
# Null hypothesis probability =   2.781983e-01
 
Photon flux (15-150 keV)    in 86.93 sec: 0.111357 ( -0.015824  0.013591 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.42728e-07 ( -1.5923e-07  1.50556e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.224 sec. to   86.704 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 15.3066  (-2.4779  3.1953)
R^2/D10^2   : 1.13491E-02  (-0.0054683   0.00971439)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.24 using 59 PHA bins.
# Reduced chi-squared =          1.408 for     57 degrees of freedom 
# Null hypothesis probability =   2.293340e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.822e-08   1.304e-08
25- 50  1.952e-07   4.194e-08
50-150  3.140e-07   8.089e-08
15-150  5.574e-07   1.093e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-74.4869      -199.363)
Norm        : 0.449513       (-0.0589094     0.0590393)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.38 using 59 PHA bins.
# Reduced chi-squared =          1.112 for     57 degrees of freedom 
# Null hypothesis probability =   2.616572e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.730e-08   5.490e-08
25- 50  1.872e-07   1.047e-07
50-150  4.105e-07   2.258e-07
15-150  6.950e-07   3.851e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.09987        (-1.21982      1.91868)
R1^2/D10^2  : 3.93748        (-3.56606      107.836)
kT2 [keV]   : 19.7952        (-4.04529      6.78985)
R2^2/D10^2  : 4.31173E-03    (-0.00272184   0.00517146)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.34 using 59 PHA bins.
# Reduced chi-squared =          1.133 for     55 degrees of freedom 
# Null hypothesis probability =   2.316359e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.066e-07   5.365e-08
25- 50  1.534e-07   4.642e-08
50-150  4.080e-07   1.532e-07
15-150  6.680e-07   2.027e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.268 sec. to    0.732 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.734508     ( -0.139614   0.134792 )
Norm@50keV  : 2.11156E-02    ( -0.00162702   0.00161243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.53 using 59 PHA bins.
# Reduced chi-squared =         0.9566 for     57 degrees of freedom 
# Null hypothesis probability =   5.683590e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.43473 ( -0.18084  0.18108 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.53834e-07 ( -2.04506e-08  2.05697e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.268 sec. to    0.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.731791     ( -0.198479   0.132099 )
Epeak [keV] : 9999.34      ( -9999.36 -9999.36 )
Norm@50keV  : 2.12704E-02    ( -0.00154711   0.00871477 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9744 for     56 degrees of freedom 
# Null hypothesis probability =   5.293506e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.44052 ( -0.2136  0.20079 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.48223e-09 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.268 sec. to    0.732 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 26.7667  (-3.07798  3.78682)
R^2/D10^2   : 5.03343E-02  (-0.0157866   0.0216034)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          89.02 using 59 PHA bins.
# Reduced chi-squared =          1.562 for     57 degrees of freedom 
# Null hypothesis probability =   4.255705e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.035e-09   9.650e-10
25- 50  3.540e-08   4.535e-09
50-150  1.857e-07   2.190e-08
15-150  2.271e-07   2.505e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 9.15008       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         150.70 using 59 PHA bins.
# Reduced chi-squared =         2.6439 for     57 degrees of freedom 
# Null hypothesis probability =   2.133967e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.278e-08   2.325e-09
25- 50  4.383e-08   1.588e-08
50-150  9.612e-08   4.985e-08
15-150  1.627e-07   5.816e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.0777        (-2.81947      3.47841)
R1^2/D10^2  : 0.415071        (-0.203411      0.508096)
kT2 [keV]   : 67.1640        (-26.5595      -68.3817)
R2^2/D10^2  : 3.92401E-03    (-0.00245385   0.00889679)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.55 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     55 degrees of freedom 
# Null hypothesis probability =   5.688506e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.218e-08   4.323e-09
25- 50  4.206e-08   1.694e-08
50-150  2.033e-07   1.032e-07
15-150  2.575e-07   1.149e-07
Plot creation:
Wed Feb 19 20:14:00 EST 2020