batgrbproduct analysis for trigger=958141

batgrbproduct Analysis for Trigger=958141

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Feb 25 10:09:41 EST 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger958141/GCN5_download_cron
======================================================================

  Trigger: 00958141      Segment: 000

  BAT Trigger Time: 604207513.792   [s; MET]
      Trigger Stop: 604207517.888   [s; MET]
               UTC: 2020-02-24T03:24:49.304000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.794294261897   Dec: 41.6752702574759  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.8
     Image Trigger?:     NO
     Rate S/N Ratio:     10.7238052947636  [ if not an image trigger ]
     Image S/N Ratio:    6.8

  Flight Position:   [ source = BAT ]
    RA: 248.794294261897   Dec: 41.6752702574759  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 248.767855470646   Dec: 41.6112446399565  [deg; J2000]  
        { 16h 35m 04.3s , +41d 36' 40.5" }
         +/- 2.65740788632042 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.10353918638152 [arcmin] (formal 1-sigma fit error)
    SNR: 7.52921146645206
 
  Angular difference between Flight and Ground position is 4.020288 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 13 +/- 4.12310562561766
        Measured from: -0.791999936103821
                   to: 12.2080000638962     [s; relative to TRIGTIME]
     T50: 6 +/- 4.12310562561766
        Measured from: 1.20800006389618
                   to: 7.20800006389618     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.20799994468689     
                   to: 3.20799994468689     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.79200005531311     
                   to: 13.2079999446869     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.097285   0.089810   0.103164   0.032775
           0.021682   0.021304   0.018681   0.016218 [error]
 Peak      0.012763   0.014019   0.016721   0.004852
           0.006226   0.006121   0.005303   0.004527 [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 2.42e-08 4.59e-08 6.74e-08 2.11e-07 1.91e-07 3.49e-07   erg/cm2
              Error 8.54e-09 9.41e-09 1.85e-08 1.33e-07 4.40e-08 1.46e-07   erg/cm2
Peak flux Power-law 8.97e-02 1.15e-01 1.08e-01 1.78e-01 3.72e-01 4.90e-01   ph/cm2/s
              Error 6.35e-02 4.99e-02 4.09e-02 1.57e-01 1.33e-01 1.81e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.45e-08 4.60e-08 6.78e-08 1.95e-07 1.91e-07 3.31e-07   erg/cm2
              Error 8.68e-09 9.24e-09 1.85e-08 1.86e-07 4.35e-08 1.90e-07   erg/cm2
Peak flux Cutoff-PL 8.81e-02 1.16e-01 1.09e-01 1.63e-01 3.71e-01 4.75e-01   ph/cm2/s
              Error 6.84e-02 5.42e-02 4.73e-02 1.87e-01 1.37e-01 3.36e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 9.70e-02 1.49e-01 1.35e-01 8.59e-02 4.30e-01 4.65e-01   ph/cm2/s
              Error -------- -------- 5.02e-02 1.02e-01 -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.447    0.387    -      -           1.55e-03 3.13e-04   38.520 57
CPL   1.459    0.480    9999.4    0.0      1.54e-03 1.43e-03   38.540 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.095    0.660    -      -           3.21e-03 1.11e-03   73.320 57
CPL   1.018    1.637     710.0    0.0      3.49e-03 1.25e-01   73.320 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   14.000   -0.792   13.208
T90    13.000   -0.792   12.208
T50     6.000    1.208    7.208
Peak    1.000    2.208    3.208

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  248.7679 +41.6112 0.0255    6.9  156.3       0.2973     7.5  TRIG_00958141       
------------------------------------------
 
Foreground time interval of the image:
 -0.792  10.068 (delta_t =  10.860 [sec])
 11.208  13.208 (delta_t =   2.000 [sec])
Background time interval of the image:
-239.792  -0.792 (delta_t = 239.000 [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
Multiple GTIs in the spectrum
tstart tstop
-0.792000 10.068000
11.208000 13.208000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44676     ( -0.381745   0.392743 )
Norm@50keV  : 1.54829E-03    ( -0.000317097   0.000309439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.52 using 59 PHA bins.
# Reduced chi-squared =         0.6758 for     57 degrees of freedom 
# Null hypothesis probability =   9.712236e-01
 
Photon flux (15-150 keV)    in 12.86 sec: 0.190652 ( -0.0374228  0.0375438 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90649e-07 ( -4.35059e-08  4.44633e-08 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-0.792000 10.068000
11.208000 13.208000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45937     ( -0.575167   0.384237 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.54167E-03    ( -0.000316472   0.00253457 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.54 using 59 PHA bins.
# Reduced chi-squared =         0.6881 for     56 degrees of freedom 
# Null hypothesis probability =   9.638339e-01
 
Photon flux (15-150 keV)    in 12.86 sec: 0.191082 ( -0.037984  0.037106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.9094e-07 ( -4.36276e-08  4.33163e-08 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-0.792000 10.068000
11.208000 13.208000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.19143   ( 1.19145   1.19145 )
beta        : -1.44668    ( 1.44671   0.381714 )
Epeak [keV] : 27.2047      ( -27.1872 -27.1872 )
Norm@50keV   : 3.13330E-03    ( -0.00188427   0.249396 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.52 using 59 PHA bins.
# Reduced chi-squared =         0.7004 for     55 degrees of freedom 
# Null hypothesis probability =   9.551827e-01
 
Photon flux (15-150 keV)    in 12.86 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]    : 18.4589  (-4.63496  6.45229)
R^2/D10^2   : 1.04496E-02  (-0.00649742   0.017007)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.50 using 59 PHA bins.
# Reduced chi-squared =         0.8509 for     57 degrees of freedom 
# Null hypothesis probability =   7.811431e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.092e-09   4.209e-09
25- 50  4.284e-08   1.894e-08
50-150  1.066e-07   4.406e-08
15-150  1.585e-07   5.569e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-77.915      -199.363)
Norm        : 0.776132       (-0.151124     0.151124)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.61 using 59 PHA bins.
# Reduced chi-squared =         0.6948 for     57 degrees of freedom 
# Null hypothesis probability =   9.614980e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.485e-08   1.466e-08
25- 50  4.781e-08   2.784e-08
50-150  1.049e-07   6.130e-08
15-150  1.775e-07   1.043e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.61673        (-1.56113      2.25771)
R1^2/D10^2  : 3.47652        (-3.11663      104.553)
kT2 [keV]   : 24.5988        (-6.71983      13.0487)
R2^2/D10^2  : 3.72073E-03    (-0.00270777   0.00396606)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.23 using 59 PHA bins.
# Reduced chi-squared =         0.6405 for     55 degrees of freedom 
# Null hypothesis probability =   9.825304e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.950e-08   1.766e-08
25- 50  3.509e-08   1.653e-08
50-150  1.284e-07   7.934e-08
15-150  1.930e-07   9.630e-08

Peak spectrum fit

Power-law model
Time interval is from    2.208 sec. to    3.208 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09481     ( -0.695775   0.623644 )
Norm@50keV  : 3.21120E-03    ( -0.00112192   0.00110535 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.32 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.156358e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.372312 ( -0.132429  0.133819 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36299e-08 ( -1.2362e-08  1.26186e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.208 sec. to    3.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01757     ( -4.29213   -1.01779 )
Epeak [keV] : 709.960      ( -712.529 -712.529 )
Norm@50keV  : 3.48513E-03    ( -0.0013226   0.24848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.32 using 59 PHA bins.
# Reduced chi-squared =          1.309 for     56 degrees of freedom 
# Null hypothesis probability =   6.004007e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.371017 ( -0.138595  0.134883 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.34985e-08 ( -1.99266e-08  1.27038e-08 ) ergs/cm2
 
Band function
Time interval is from    2.208 sec. to    3.208 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.897937   ( 0.897937   0.897937 )
beta        : -1.09481    ( 1.09481   0.695854 )
Epeak [keV] : 47.4090      ( -47.409 -47.409 )
Norm@50keV   : 5.54604E-03    ( -0.00343256   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.32 using 59 PHA bins.
# Reduced chi-squared =          1.333 for     55 degrees of freedom 
# Null hypothesis probability =   4.991880e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.430085 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.54823e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 20.0281  (-7.28712  17.0237)
R^2/D10^2   : 1.73072E-02  (-0.0173146   0.0602644)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.72 using 59 PHA bins.
# Reduced chi-squared =          1.311 for     57 degrees of freedom 
# Null hypothesis probability =   5.766045e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.338e-09   8.915e-10
25- 50  6.669e-09   4.206e-09
50-150  1.983e-08   1.304e-08
15-150  2.784e-08   1.822e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-116.559      -199.363)
Norm        : 1.54988       (-0.547723     0.547723)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.86 using 59 PHA bins.
# Reduced chi-squared =          1.313 for     57 degrees of freedom 
# Null hypothesis probability =   5.640582e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.859e-09   2.424e-09
25- 50  7.424e-09   4.720e-09
50-150  1.628e-08   1.022e-08
15-150  2.757e-08   1.730e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 13.5900        (-8.5393      15.5315)
R1^2/D10^2  : 4.82217E-02        (-0.0443678      -0.0482364)
kT2 [keV]   : 198.995        (-199.011      -199.011)
R2^2/D10^2  : 5.68666E-05    (-5.7116e-05   0.0491914)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.31 using 59 PHA bins.
# Reduced chi-squared =          1.333 for     55 degrees of freedom 
# Null hypothesis probability =   4.999553e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.958e-09   1.368e-09
25- 50  7.423e-09   5.195e-09
50-150  2.317e-08   9.420e-09
15-150  3.255e-08   1.510e-08
Plot creation:
Tue Feb 25 10:13:33 EST 2020