batgrbproduct analysis for trigger=821881

batgrbproduct Analysis for Trigger=821881

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Apr  4 23:21:49 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger821881/GCN5_download_cron
======================================================================

  Trigger: 00821881      Segment: 000

  BAT Trigger Time: 544495556.416   [s; MET]
      Trigger Stop: 544495557.44   [s; MET]
               UTC: 2018-04-04T00:45:35.686520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 83.5636225759874   Dec: -37.1698540029188  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.76
     Image Trigger?:     NO
     Rate S/N Ratio:     13.856406460551  [ if not an image trigger ]
     Image S/N Ratio:    8.76

  Flight Position:   [ source = BAT ]
    RA: 83.5636225759874   Dec: -37.1698540029188  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 83.5396414891862   Dec: -37.1681808482558  [deg; J2000]  
        { 05h 34m 09.5s , -37d 10' 05.5" }
         +/- 1.06439497529973 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.414172778282304 [arcmin] (formal 1-sigma fit error)
    SNR: 27.8227511788413
 
  Angular difference between Flight and Ground position is 1.150956 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 701.359999895096 +/- 87.9465810827809
        Measured from: -12.0559998750687
                   to: 689.304000020027     [s; relative to TRIGTIME]
     T50: 422.899999976158 +/- 94.6472998413403
        Measured from: 1.48400008678436
                   to: 424.384000062943     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.99199998378754     
                   to: 2.99199998378754     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -20.7439999580383     
                   to: 742.815999984741     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.806859   0.346702   0.399889   0.113636
           0.147255   0.156285   0.138916   0.136138 [error]
 Peak      0.046453   0.062457   0.037839   0.012006
           0.006739   0.006803   0.005943   0.005112 [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 2.52e-07 2.40e-07 1.59e-07 1.63e-07 7.16e-07 8.14e-07   erg/cm2
              Error 8.07e-08 9.55e-08 1.54e-07 2.93e-07 2.98e-07 4.77e-07   erg/cm2
Peak flux Power-law 4.94e-01 4.47e-01 2.79e-01 2.66e-01 1.33e+00 1.49e+00   ph/cm2/s
              Error 9.91e-02 5.68e-02 4.95e-02 9.44e-02 1.67e-01 1.87e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.52e-07 2.39e-07 1.57e-07 1.59e-07 7.14e-07 8.07e-07   erg/cm2
              Error 8.01e-08 9.55e-08 8.41e-08 2.91e-07 2.95e-07 3.41e-07   erg/cm2
Peak flux Cutoff-PL 4.94e-01 4.47e-01 2.79e-01 2.64e-01 1.33e+00 1.48e+00   ph/cm2/s
              Error 7.66e-02 6.35e-02 5.03e-02 1.84e-01 1.26e-01 2.23e-01   ph/cm2/s
 
Fluence        Band 4.30e-06 6.11e-06 6.24e-06 1.03e-05 2.03e-05 2.71e-05   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    2.592    0.902    -      -           9.38e-05 7.47e-05   51.950 57
CPL   1.818    0.000      13.7    0.0      2.25e-04 0.00e+00   53.510 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.680    0.224    -      -           1.01e-02 1.38e-03   53.860 57
CPL   1.678    0.547    9988.9   -0.0      1.01e-02 0.00e+00   53.860 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: 742.080000 sec.
T50 in the 50-300 keV band: 558.528000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  763.560  -20.744  742.816
T90   701.360  -12.056  689.304
T50   422.900    1.484  424.384
Peak    1.000    1.992    2.992

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   83.5396 -37.1682 0.0069   32.5   -8.8       2.2193    27.8  TRIG_00821881       
------------------------------------------
 
Foreground time interval of the image:
-20.744  17.185 (delta_t =  37.929 [sec])
Background time interval of the image:
-168.915 -20.744 (delta_t = 148.171 [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
-20.744000 636.604000
641.584000 643.114000
646.584000 646.644000
653.584000 653.634000
656.584000 669.904000
670.584000 742.816000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.59153     ( -0.683507   1.12072 )
Norm@50keV  : 9.38298E-05    ( -9.36899e-05   5.56582e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.95 using 59 PHA bins.
# Reduced chi-squared =         0.9114 for     57 degrees of freedom 
# Null hypothesis probability =   6.645727e-01
 
Photon flux (15-150 keV)    in 744.5 sec: 1.95132E-02 ( -0.0051665  0.00514291 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.16496e-07 ( -2.83075e-07  3.13269e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-20.744000 636.604000
641.584000 643.114000
646.584000 646.644000
653.584000 653.634000
656.584000 669.904000
670.584000 742.816000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81812     (     )
Epeak [keV] : 13.6680      (   )
Norm@50keV  : 2.25199E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.51 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     56 degrees of freedom 
# Null hypothesis probability =   5.698751e-01
 
Photon flux (15-150 keV)    in 744.5 sec: 1.94905E-02 ( -0.0051553  0.005154 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.1361e-07 ( -2.74534e-07  3.16309e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-20.744000 636.604000
641.584000 643.114000
646.584000 646.644000
653.584000 653.634000
656.584000 669.904000
670.584000 742.816000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -5.56476   ( 5.56476   5.56476 )
beta        : -2.59373    ( -1.11835   0.684425 )
Epeak [keV] : 3.89574      ( -3.89574 -3.89574 )
Norm@50keV   : 1.27327E-02    ( -0.0127315   0.00756704 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.95 using 59 PHA bins.
# Reduced chi-squared =         0.9445 for     55 degrees of freedom 
# Null hypothesis probability =   5.919919e-01
 
Photon flux (15-150 keV)    in 744.5 sec: 0.449854 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03014e-05 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 3.49897  (-1.01378  1.94981)
R^2/D10^2   : 0.836644  (-0.836967   5.67042)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.70 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     57 degrees of freedom 
# Null hypothesis probability =   4.129437e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.849e-07   1.691e-07
25- 50  6.900e-08   4.303e-08
50-150  3.528e-10   4.035e-10
15-150  3.543e-07   2.032e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 37.9204       (-38.2536      81.9688)
Norm        : 0.128579       (-0.0563411     0.553666)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.91 using 59 PHA bins.
# Reduced chi-squared =         0.9633 for     57 degrees of freedom 
# Null hypothesis probability =   5.539830e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.157e-07   1.051e-07
25- 50  2.772e-07   1.411e-07
50-150  2.021e-07   1.547e-07
15-150  6.950e-07   3.776e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.76514        (-0.913859      1.16601)
R1^2/D10^2  : 2.74520        (-2.39469      44.3442)
kT2 [keV]   : 17.6925        (-6.18755      12.8835)
R2^2/D10^2  : 7.74530E-04    (-0.000665807   0.00288135)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.47 using 59 PHA bins.
# Reduced chi-squared =         0.8448 for     55 degrees of freedom 
# Null hypothesis probability =   7.868476e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.625e-07   1.463e-07
25- 50  1.904e-07   1.162e-07
50-150  3.752e-07   2.541e-07
15-150  8.280e-07   4.437e-07

Peak spectrum fit

Power-law model
Time interval is from    1.992 sec. to    2.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67951     ( -0.221772   0.226846 )
Norm@50keV  : 1.01005E-02    ( -0.00138981   0.00136433 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.86 using 59 PHA bins.
# Reduced chi-squared =         0.9449 for     57 degrees of freedom 
# Null hypothesis probability =   5.936665e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33199 ( -0.167192  0.167372 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36779e-08 ( -1.34864e-08  1.37123e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.992 sec. to    2.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67802     ( -0.783977   0.310759 )
Epeak [keV] : 9988.85      ( -9992.38 -9992.39 )
Norm@50keV  : 1.01201E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.86 using 59 PHA bins.
# Reduced chi-squared =         0.9618 for     56 degrees of freedom 
# Null hypothesis probability =   5.563320e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33165 ( -0.08515  0.16674 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.36784e-08 ( -1.5448e-08  1.36056e-08 ) ergs/cm2
 
Band function
Time interval is from    1.992 sec. to    2.992 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.93857   ( -4.93857   -4.93857 )
beta        : -1.83343    ( -0.404889   0.271013 )
Epeak [keV] : 24.5365      ( -24.5365 5.75347 )
Norm@50keV   : 1309.20    ( -161.336   6.61414e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.66 using 59 PHA bins.
# Reduced chi-squared =         0.9393 for     55 degrees of freedom 
# Null hypothesis probability =   6.029329e-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]    : 11.2843  (-1.85889  2.35379)
R^2/D10^2   : 0.396856  (-0.198573   0.378934)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.36 using 59 PHA bins.
# Reduced chi-squared =          1.287 for     57 degrees of freedom 
# Null hypothesis probability =   7.117895e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.061e-08   2.666e-09
25- 50  3.098e-08   5.065e-09
50-150  2.272e-08   7.440e-09
15-150  6.431e-08   1.195e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 144.062       (-63.6708      -142.237)
Norm        : 5.48982       (-0.76783     1.08017)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.51 using 59 PHA bins.
# Reduced chi-squared =         0.9564 for     57 degrees of freedom 
# Null hypothesis probability =   5.689546e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.415e-08   7.360e-09
25- 50  2.606e-08   1.023e-08
50-150  5.058e-08   3.042e-08
15-150  9.079e-08   5.225e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.11907        (-1.55743      1.89287)
R1^2/D10^2  : 1.74366        (-0.98566      1.40905)
kT2 [keV]   : 35.8250        (-13.9247      74.9468)
R2^2/D10^2  : 5.27724E-03    (-0.00479466   0.0215902)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.28 using 59 PHA bins.
# Reduced chi-squared =         0.9141 for     55 degrees of freedom 
# Null hypothesis probability =   6.553904e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.539e-08   6.000e-09
25- 50  2.665e-08   9.908e-09
50-150  5.512e-08   2.967e-08
15-150  9.715e-08   4.063e-08
Plot creation:
Wed Apr  4 23:33:44 EDT 2018