batgrbproduct analysis for trigger=867987

batgrbproduct Analysis for Trigger=867987

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Oct 21 17:57:23 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger867987/GCN5_download_cron
======================================================================

  Trigger: 00867987      Segment: 000

  BAT Trigger Time: 561754855.296   [s; MET]
      Trigger Stop: 561754855.424   [s; MET]
               UTC: 2018-10-20T19:00:33.510100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.9670984422145   Dec: -47.3799961910664  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.26
     Image Trigger?:     NO
     Rate S/N Ratio:     28.9309522829789  [ if not an image trigger ]
     Image S/N Ratio:    8.26

  Flight Position:   [ source = BAT ]
    RA: 13.9670984422145   Dec: -47.3799961910664  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 13.9868623321715   Dec: -47.3716841057868  [deg; J2000]  
        { 00h 55m 56.8s , -47d 22' 18.1" }
         +/- 0.581130239070835 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.139139096531056 [arcmin] (formal 1-sigma fit error)
    SNR: 66.0496558777664
 
  Angular difference between Flight and Ground position is 0.945296 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 238.024000048637 +/- 11.58881809789
        Measured from: 0.800000071525574
                   to: 238.824000120163     [s; relative to TRIGTIME]
     T50: 16.0599999427795 +/- 4.87504674487273
        Measured from: 4.52400016784668
                   to: 20.5840001106262     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.26399993896484     
                   to: 8.26399993896484     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.44799995422363     
                   to: 271.203999996185     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.033375   4.379395   3.965776   1.071260
           0.110823   0.117736   0.108480   0.104280 [error]
 Peak      0.174279   0.335611   0.390650   0.129983
           0.010215   0.012820   0.013917   0.011627 [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 8.16e-07 1.75e-06 2.95e-06 1.14e-05 8.11e-06 1.69e-05   erg/cm2
              Error 5.29e-08 6.43e-08 1.10e-07 1.01e-06 2.75e-07 1.07e-06   erg/cm2
Peak flux Power-law 1.50e+00 2.21e+00 2.43e+00 5.01e+00 7.66e+00 1.11e+01   ph/cm2/s
              Error 1.30e-01 1.13e-01 1.08e-01 5.07e-01 3.11e-01 5.54e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.96e-07 1.76e-06 2.98e-06 9.89e-06 8.05e-06 1.54e-05   erg/cm2
              Error 6.80e-08 6.68e-08 1.23e-07 2.01e-06 3.07e-07 2.53e-06   erg/cm2
Peak flux Cutoff-PL 1.43e+00 2.22e+00 2.48e+00 4.16e+00 7.60e+00 1.03e+01   ph/cm2/s
              Error 1.70e-01 1.18e-01 1.36e-01 1.01e+00 3.25e-01 1.05e+00   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    1.247    0.060    -      -           2.97e-03 9.08e-05   52.410 57
CPL   1.148    0.182     479.7    0.0      3.29e-03 6.39e-04   51.870 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.863    0.074    -      -           6.68e-02 2.71e-03   67.100 57
CPL   0.687    0.264     437.3    0.0      7.96e-02 2.12e-02   66.010 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: 259.712000 sec.
T50 in the 50-300 keV band: 9.856000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  272.652   -1.448  271.204
T90   238.024    0.800  238.824
T50    16.060    4.524   20.584
Peak    1.000    7.264    8.264

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   13.9869 -47.3717 0.0029   12.1   64.7       6.9797    66.0  TRIG_00867987       
------------------------------------------
 
Foreground time interval of the image:
 -1.448   8.905 (delta_t =  10.353 [sec])
Background time interval of the image:
-239.296  -1.448 (delta_t = 237.848 [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   -1.448 sec. to  271.204 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24690     ( -0.0600872   0.059919 )
Norm@50keV  : 2.96838E-03    ( -9.08419e-05   9.08322e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.41 using 59 PHA bins.
# Reduced chi-squared =         0.9195 for     57 degrees of freedom 
# Null hypothesis probability =   6.476688e-01
 
Photon flux (15-150 keV)    in 272.7 sec: 0.350902 ( -0.0113867  0.0114244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.10786e-06 ( -2.74023e-07  2.75282e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.448 sec. to  271.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14777     ( -0.239072   0.125215 )
Epeak [keV] : 479.681      ( -479.643 -479.643 )
Norm@50keV  : 3.28962E-03    ( -0.000383301   0.000894856 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.87 using 59 PHA bins.
# Reduced chi-squared =         0.9262 for     56 degrees of freedom 
# Null hypothesis probability =   6.319332e-01
 
Photon flux (15-150 keV)    in 272.7 sec: 0.348407 ( -0.012648  0.012668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.05199e-06 ( -3.08015e-07  3.05915e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.448 sec. to  271.204 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14530   ( 0.821492   0.821492 )
beta        : -1.39204    ( 1.52161   0.328378 )
Epeak [keV] : 476.143      ( -477.398 -477.398 )
Norm@50keV   : 3.29361E-03    ( -0.0004687   0.000777459 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.88 using 59 PHA bins.
# Reduced chi-squared =         0.9432 for     55 degrees of freedom 
# Null hypothesis probability =   5.947039e-01
 
Photon flux (15-150 keV)    in 272.7 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]    : 19.1380  (  )
R^2/D10^2   : 1.78093E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         236.45 using 59 PHA bins.
# Reduced chi-squared =         4.1482 for     57 degrees of freedom 
# Null hypothesis probability =   1.023487e-23
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.487e-07   2.250e-08
25- 50  1.686e-06   6.777e-08
50-150  4.544e-06   2.618e-07
15-150  6.579e-06   2.550e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1.47006       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         131.73 using 59 PHA bins.
# Reduced chi-squared =         2.3110 for     57 degrees of freedom 
# Null hypothesis probability =   7.540428e-08
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.982e-07   3.095e-08
25- 50  1.920e-06   6.504e-08
50-150  4.212e-06   1.377e-07
15-150  7.130e-06   2.577e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.14833        (-0.960585      1.11219)
R1^2/D10^2  : 0.272929        (-0.103213      0.182598)
kT2 [keV]   : 29.4014        (-2.96894      4.19391)
R2^2/D10^2  : 3.78063E-03    (-0.00135307   0.0016513)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.40 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Null hypothesis probability =   4.222091e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.653e-07   9.504e-08
25- 50  1.753e-06   1.625e-07
50-150  5.472e-06   3.995e-07
15-150  7.990e-06   5.890e-07

Peak spectrum fit

Power-law model
Time interval is from    7.264 sec. to    8.264 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.863292     ( -0.0746639   0.0741357 )
Norm@50keV  : 6.67589E-02    ( -0.00271714   0.00271192 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.10 using 59 PHA bins.
# Reduced chi-squared =          1.177 for     57 degrees of freedom 
# Null hypothesis probability =   1.693179e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.66230 ( -0.310711  0.310797 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.60134e-07 ( -3.51412e-08  3.52811e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    7.264 sec. to    8.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.686809     ( -0.304365   0.223729 )
Epeak [keV] : 437.254      ( -437.253 -437.253 )
Norm@50keV  : 7.96376E-02    ( -0.0150583   0.0272667 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.01 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     56 degrees of freedom 
# Null hypothesis probability =   1.693987e-01
 
Photon flux (15-150 keV)    in 1 sec: 7.60296 ( -0.32512  0.32455 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.53684e-07 ( -3.7354e-08  3.7124e-08 ) ergs/cm2
 
Band function
Time interval is from    7.264 sec. to    8.264 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.849280   ( 0.8492   0.8492 )
beta        : -0.879762    ( -0.0741299   0.0746805 )
Epeak [keV] : 10000.00      ( -10000 -10000 )
Norm@50keV   : 6.71667E-02    ( -0.00269487   0.00269026 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.04 using 59 PHA bins.
# Reduced chi-squared =          1.219 for     55 degrees of freedom 
# Null hypothesis probability =   1.279461e-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]    : 23.9724  (  )
R^2/D10^2   : 0.216832  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         146.29 using 59 PHA bins.
# Reduced chi-squared =         2.5664 for     57 degrees of freedom 
# Null hypothesis probability =   8.710620e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.212e-08   1.855e-09
25- 50  1.228e-07   7.150e-09
50-150  5.258e-07   3.740e-08
15-150  6.707e-07   3.710e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 29.4323       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         283.03 using 59 PHA bins.
# Reduced chi-squared =         4.9655 for     57 degrees of freedom 
# Null hypothesis probability =   1.051854e-31
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.329e-08   3.240e-09
25- 50  1.410e-07   7.100e-09
50-150  3.092e-07   1.770e-08
15-150  5.235e-07   2.570e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.63325        (-1.61625      2.06294)
R1^2/D10^2  : 3.31053        (-1.66679      4.02135)
kT2 [keV]   : 34.3472        (-4.27846      7.1308)
R2^2/D10^2  : 6.67068E-02    (-0.0291297   0.0342168)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.89 using 59 PHA bins.
# Reduced chi-squared =          1.216 for     55 degrees of freedom 
# Null hypothesis probability =   1.306113e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.490e-08   1.016e-08
25- 50  1.274e-07   1.739e-08
50-150  5.844e-07   7.715e-08
15-150  7.568e-07   1.033e-07
Plot creation:
Sun Oct 21 18:01:42 EDT 2018