batgrbproduct analysis for trigger=840853

batgrbproduct Analysis for Trigger=840853

Analysis Summary

Special note:

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jun 13 19:40:30 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger840853/GCN5_download_cron
======================================================================

  Trigger: 00840853      Segment: 000

  BAT Trigger Time: 550597000   [s; MET]
      Trigger Stop: 550597080   [s; MET]
               UTC: 2018-06-13T15:36:18.900460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 211.562192886621   Dec: -43.0756203733291  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.59
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.59

  Flight Position:   [ source = BAT ]
    RA: 211.562192886621   Dec: -43.0756203733291  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 211.543917497897   Dec: -43.0645738270669  [deg; J2000]  
        { 14h 06m 10.5s , -43d 03' 52.5" }
         +/- 1.96666109266687 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.930876823575038 [arcmin] (formal 1-sigma fit error)
    SNR: 11.574567484212
 
  Angular difference between Flight and Ground position is 1.039685 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 51.3600001335144 +/- 9.14108445629786
        Measured from: 27.9120000600815
                   to: 79.2720001935959     [s; relative to TRIGTIME]
     T50: 24.0800000429153 +/- 9.47427007997982
        Measured from: 37.5920001268387
                   to: 61.672000169754     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 42.9880000352859     
                   to: 43.9880000352859     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 24.8400000333786     
                   to: 82.7280000448227     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.340545   0.491443   0.213493   0.043966
           0.043857   0.046821   0.042193   0.042132 [error]
 Peak      0.018336   0.015603   0.011941   0.006142
           0.005802   0.006276   0.005606   0.005665 [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 9.33e-08 1.62e-07 2.15e-07 5.82e-07 6.27e-07 1.05e-06   erg/cm2
              Error 1.64e-08 2.00e-08 3.94e-08 2.11e-07 9.52e-08 2.52e-07   erg/cm2
Peak flux Power-law 1.24e-01 1.15e-01 7.36e-02 7.28e-02 3.42e-01 3.85e-01   ph/cm2/s
              Error 6.72e-02 4.62e-02 4.26e-02 9.24e-02 1.38e-01 1.65e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.58e-08 2.08e-07 1.63e-07 2.54e-08 4.80e-07 4.82e-07   erg/cm2
              Error 1.85e-08 3.42e-08 6.46e-08 7.26e-08 1.01e-07 1.23e-07   erg/cm2
Peak flux Cutoff-PL 1.14e-01 1.61e-01 4.78e-02 1.36e-03 3.24e-01 3.24e-01   ph/cm2/s
              Error 7.53e-02 7.82e-02 5.72e-02 5.57e-02 1.32e-01 1.49e-01   ph/cm2/s
 
Fluence        Band 8.90e-08 2.07e-07 1.78e-07 2.53e-07 5.67e-07 7.29e-07   erg/cm2
              Error 1.90e-08 3.10e-08 4.35e-08 -------- 9.77e-08 --------   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    1.593    0.202    -      -           1.16e-03 1.61e-04   74.150 57
CPL  -0.546    1.608      44.9   12.6      2.40e-02 1.80e-01   65.820 56
 
The chi2 of BB fit is 67.18 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.638    0.680    -      -           2.63e-03 1.22e-03   55.270 57
CPL  -1.064    1.048      40.8    0.0      1.38e-01 0.00e+00   53.710 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   57.888   24.840   82.728
T90    51.360   27.912   79.272
T50    24.080   37.592   61.672
Peak    1.000   42.988   43.988

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  211.5439 -43.0646 0.0167   17.9  165.9       1.1083    11.6  TRIG_00840853       
------------------------------------------
 
Foreground time interval of the image:
 24.840  82.728 (delta_t =  57.888 [sec])
Background time interval of the image:
-239.000  24.840 (delta_t = 263.840 [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   24.840 sec. to   82.728 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59283     ( -0.200022   0.20384 )
Norm@50keV  : 1.15748E-03    ( -0.000161922   0.000159772 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.15 using 59 PHA bins.
# Reduced chi-squared =          1.301 for     57 degrees of freedom 
# Null hypothesis probability =   6.308187e-02
 
Photon flux (15-150 keV)    in 57.89 sec: 0.148413 ( -0.0183396  0.01834 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.27215e-07 ( -9.38918e-08  9.64691e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   24.840 sec. to   82.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.545672     ( -1.84874   1.36719 )
Epeak [keV] : 44.9075      ( -7.23699 17.9904 )
Norm@50keV  : 2.40329E-02    ( -0.0242175   0.335254 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.82 using 59 PHA bins.
# Reduced chi-squared =          1.175 for     56 degrees of freedom 
# Null hypothesis probability =   1.735090e-01
 
Photon flux (15-150 keV)    in 57.89 sec: 0.139180 ( -0.018274  0.018635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.80312e-07 ( -8.74185e-08  1.1456e-07 ) ergs/cm2
 
Band function
Time interval is from   24.840 sec. to   82.728 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98349   ( -3.3463   -4.98349 )
beta        : -2.23543    ( -0.575996   0.364686 )
Epeak [keV] : 30.2676      ( -3.95157 3.6685 )
Norm@50keV   : 48.7795    ( -5.77749   68.1413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.49 using 59 PHA bins.
# Reduced chi-squared =          1.064 for     55 degrees of freedom 
# Null hypothesis probability =   3.483787e-01
 
Photon flux (15-150 keV)    in 57.89 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.67222e-07 ( -5.66817e-07  -9.45934e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.7101  (-1.26267  1.49541)
R^2/D10^2   : 5.85348E-02  (-0.0225378   0.0345225)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.18 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     57 degrees of freedom 
# Null hypothesis probability =   1.676481e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.074e-08   1.734e-08
25- 50  2.205e-07   3.580e-08
50-150  1.399e-07   4.067e-08
15-150  4.411e-07   7.343e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 135.143       (-55.4392      -133.118)
Norm        : 0.625876       (-0.0800363     0.106966)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.06 using 59 PHA bins.
# Reduced chi-squared =          1.247 for     57 degrees of freedom 
# Null hypothesis probability =   9.974771e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.379e-08   2.641e-08
25- 50  1.711e-07   7.437e-08
50-150  3.229e-07   2.021e-07
15-150  5.878e-07   2.670e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.52265        (-1.18818      1.3725)
R1^2/D10^2  : 8.29309E-02        (-0.0384087      0.0241731)
kT2 [keV]   : 199.363        (-199.363      -199.363)
R2^2/D10^2  : 1.40417E-05    (-7.0558e-06   0.000616776)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.72 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     55 degrees of freedom 
# Null hypothesis probability =   3.406662e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.807e-08   2.517e-08
25- 50  2.104e-07   5.879e-08
50-150  3.064e-07   7.950e-08
15-150  6.049e-07   1.608e-07

Peak spectrum fit

Power-law model
Time interval is from   42.988 sec. to   43.988 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63846     ( -0.648451   0.710651 )
Norm@50keV  : 2.63177E-03    ( -0.00124611   0.00120098 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.27 using 59 PHA bins.
# Reduced chi-squared =         0.9697 for     57 degrees of freedom 
# Null hypothesis probability =   5.401403e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.342329 ( -0.137982  0.138138 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.44934e-08 ( -1.15737e-08  1.26844e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   42.988 sec. to   43.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.06351     ( 1.11188   3.2086 )
Epeak [keV] : 40.7553      (   )
Norm@50keV  : 0.137791    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.71 using 59 PHA bins.
# Reduced chi-squared =         0.9592 for     56 degrees of freedom 
# Null hypothesis probability =   5.619103e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.324249 ( -0.129681  0.134794 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78108e-08 ( -8.67355e-09  1.48803e-08 ) ergs/cm2
 
Band function
Time interval is from   42.988 sec. to   43.988 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.90015   ( -4.90015   -4.90015 )
beta        : -2.65202    ( 2.65202   1.2128 )
Epeak [keV] : 31.3782      ( -31.3782 11.0153 )
Norm@50keV   : 88.6035    ( -33.1948   1.67407e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.69 using 59 PHA bins.
# Reduced chi-squared =         0.9579 for     55 degrees of freedom 
# Null hypothesis probability =   5.635454e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.1312e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.1193  (-3.24757  5.40188)
R^2/D10^2   : 0.171952  (-0.171952   0.529238)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.77 using 59 PHA bins.
# Reduced chi-squared =         0.9432 for     57 degrees of freedom 
# Null hypothesis probability =   5.972026e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.600e-09   2.336e-09
25- 50  9.102e-09   5.750e-09
50-150  4.916e-09   4.094e-09
15-150  1.762e-08   1.177e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 99.8407       (-99.8816      -99.8816)
Norm        : 1.54101       (-0.663586     1.05738)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.79 using 59 PHA bins.
# Reduced chi-squared =         0.9611 for     57 degrees of freedom 
# Null hypothesis probability =   5.586326e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.028e-09   2.557e-09
25- 50  6.962e-09   4.571e-09
50-150  1.127e-08   9.060e-09
15-150  2.226e-08   1.588e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 197.973        (-197.979      -197.979)
R1^2/D10^2  : 2.68190E-05        (-2.68272e-05      0.0205838)
kT2 [keV]   : 9.30055        (-9.30054      5.46295)
R2^2/D10^2  : 0.220529    (-0.22057   5.06007)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.71 using 59 PHA bins.
#Fit statistic : Chi-Squared =          53.25 using 59 PHA bins.
# Reduced chi-squared =         0.9765 for     55 degrees of freedom 
# Reduced chi-squared =         0.9682 for     55 degrees of freedom 
# Null hypothesis probability =   5.240160e-01
# Null hypothesis probability =   5.418054e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.587e-09   2.439e-06
25- 50  8.526e-09   2.299e-05
50-150  5.618e-09   6.085e-04
15-150  1.773e-08   6.330e-04
Plot creation:
Wed Jun 13 19:45:12 EDT 2018