batgrbproduct analysis for trigger=889483

batgrbproduct Analysis for Trigger=889483

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Feb 19 08:15:24 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger889483/GCN5_download_cron
======================================================================

  Trigger: 00889483      Segment: 000

  BAT Trigger Time: 572172872   [s; MET]
      Trigger Stop: 572173192   [s; MET]
               UTC: 2019-02-18T08:54:09.562760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 284.639647693538   Dec: -8.23516688247093  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.54
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.54

  Flight Position:   [ source = BAT ]
    RA: 284.639647693538   Dec: -8.23516688247093  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 284.696128508164   Dec: -8.19500882405794  [deg; J2000]  
        { 18h 58m 47.1s , -08d 11' 42.0" }
         +/- 3.91937104798457 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.64018965664387 [arcmin] (formal 1-sigma fit error)
    SNR: 4.32181734617424
 
  Angular difference between Flight and Ground position is 4.129822 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 254.81199991703 +/- 56.4983984064395
        Measured from: 25.5440001487732
                   to: 280.356000065804     [s; relative to TRIGTIME]
     T50: 135.711999893188 +/- 54.4918872408721
        Measured from: 76.5080001354218
                   to: 212.22000002861     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 186.108000040054     
                   to: 187.108000040054     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 14.8359999656677     
                   to: 304.715999960899     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.725329   0.726832   0.170357   0.060120
           0.125742   0.113728   0.093974   0.079078 [error]
 Peak      0.020172   0.018770   0.005739   0.005469
           0.008173   0.007393   0.006082   0.005205 [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 2.18e-07 2.46e-07 1.98e-07 2.64e-07 7.59e-07 9.26e-07   erg/cm2
              Error 5.10e-08 5.10e-08 7.65e-08 1.95e-07 1.81e-07 3.02e-07   erg/cm2
Peak flux Power-law 1.86e-01 1.24e-01 5.36e-02 3.19e-02 3.80e-01 3.96e-01   ph/cm2/s
              Error 1.11e-01 6.05e-02 4.65e-02 6.06e-02 1.69e-01 1.79e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-07 2.97e-07 4.20e-08 1.47e-10 5.58e-07 5.58e-07   erg/cm2
              Error 5.78e-08 7.76e-08 9.53e-08 3.55e-08 1.61e-07 1.66e-07   erg/cm2
Peak flux Cutoff-PL 1.88e-01 1.23e-01 5.22e-02 2.98e-02 3.79e-01 3.95e-01   ph/cm2/s
              Error 1.50e-01 7.13e-02 4.69e-02 6.03e-02 1.69e-01 1.76e-01   ph/cm2/s
 
Fluence        Band 2.60e-07 2.74e-07 9.64e-08 4.37e-08 6.57e-07 6.78e-07   erg/cm2
              Error 6.57e-08 7.67e-08 -------- -------- 1.85e-07 --------   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    2.314    0.378    -      -           3.36e-04 9.62e-05   66.110 57
CPL  -0.877    5.763      27.2    0.0      5.45e-02 0.00e+00   62.000 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.208    1.134    -      -           2.28e-03 1.87e-03   40.880 57
CPL   1.780    0.000      27.1    0.0      3.75e-03 0.00e+00   40.990 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  289.880   14.836  304.716
T90   254.812   25.544  280.356
T50   135.712   76.508  212.220
Peak    1.000  186.108  187.108

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  284.6961  -8.1950 0.0446    6.7 -116.0       2.6429     4.3  TRIG_00889483       
------------------------------------------
 
Foreground time interval of the image:
 14.836 123.111 (delta_t = 108.275 [sec])
177.000 304.716 (delta_t = 127.716 [sec])
Background time interval of the image:
-14.899  14.836 (delta_t =  29.735 [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
14.836000 123.110600
177.000000 304.716000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.31396     ( -0.357221   0.398327 )
Norm@50keV  : 3.35629E-04    ( -9.6344e-05   9.61149e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.11 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     57 degrees of freedom 
# Null hypothesis probability =   1.912077e-01
 
Photon flux (15-150 keV)    in 236 sec: 5.91132E-02 ( -0.0112042  0.0112071 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.58931e-07 ( -1.75948e-07  1.86976e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
14.836000 123.110600
177.000000 304.716000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.876943     ( -8.82056   2.70552 )
Epeak [keV] : 27.1940      (   )
Norm@50keV  : 5.45463E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.00 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     56 degrees of freedom 
# Null hypothesis probability =   2.709276e-01
 
Photon flux (15-150 keV)    in 236 sec: 5.49910E-02 ( -0.0110077  0.0111667 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.57805e-07 ( -1.30314e-07  1.91495e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
14.836000 123.110600
177.000000 304.716000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5.09774   -5 )
beta        : -3.37853    ( -2.93864   0.849701 )
Epeak [keV] : 25.5447      ( -4.67205 3.63311 )
Norm@50keV   : 72.5305    ( -13.1441   200.898 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.02 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     55 degrees of freedom 
# Null hypothesis probability =   3.309533e-01
 
Photon flux (15-150 keV)    in 236 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.56734e-07 ( -6.55082e-07  -1.67673e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 6.97184  (-1.12726  1.40002)
R^2/D10^2   : 0.119176  (-0.0639816   0.131118)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.96 using 59 PHA bins.
# Reduced chi-squared =          1.087 for     57 degrees of freedom 
# Null hypothesis probability =   3.035863e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.187e-07   7.645e-08
25- 50  2.972e-07   1.036e-07
50-150  4.853e-08   3.284e-08
15-150  5.644e-07   1.835e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 33.6259       (-11.8032      23.4287)
Norm        : 0.438730       (-0.141999     0.218736)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.80 using 59 PHA bins.
# Reduced chi-squared =          1.119 for     57 degrees of freedom 
# Null hypothesis probability =   2.497581e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.224e-07   5.907e-08
25- 50  2.699e-07   7.856e-08
50-150  1.708e-07   1.140e-07
15-150  6.630e-07   1.979e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.64037        (-1.31481      1.20991)
R1^2/D10^2  : 0.141244        (-0.0616625      0.167578)
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 3.86417E-06    (-3.56052e-06   3.40182e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.01 using 59 PHA bins.
#Fit statistic : Chi-Squared =          58.98 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     55 degrees of freedom 
# Reduced chi-squared =          1.072 for     55 degrees of freedom 
# Null hypothesis probability =   3.311651e-01
# Null hypothesis probability =   3.321750e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.201e-07   1.096e-07
25- 50  2.893e-07   1.229e-07
50-150  2.703e-07   4.462e-08
15-150  7.797e-07   2.316e-07

Peak spectrum fit

Power-law model
Time interval is from  186.108 sec. to  187.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.20786     ( -0.900416   1.36679 )
Norm@50keV  : 2.28328E-03    ( -0.00228328   0.0014641 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.88 using 59 PHA bins.
# Reduced chi-squared =         0.7172 for     57 degrees of freedom 
# Null hypothesis probability =   9.471287e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.379574 ( -0.168713  0.168744 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.14917e-08 ( -1.17078e-08  1.30886e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  186.108 sec. to  187.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77978     (     )
Epeak [keV] : 27.1061      (   )
Norm@50keV  : 3.74921E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.99 using 59 PHA bins.
# Reduced chi-squared =         0.7320 for     56 degrees of freedom 
# Null hypothesis probability =   9.338291e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.379355 ( -0.168684  0.16843 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.12516e-08 ( -1.16238e-08  1.3153e-08 ) ergs/cm2
 
Band function
Time interval is from  186.108 sec. to  187.108 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.61348   ( 1.61495   1.61495 )
beta        : -2.20594    ( 2.20693   0.896742 )
Epeak [keV] : 9.13364      ( -8.73463 -8.73463 )
Norm@50keV   : 8.78415E-03    ( -0.00897501   58.6821 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.88 using 59 PHA bins.
# Reduced chi-squared =         0.7432 for     55 degrees of freedom 
# Null hypothesis probability =   9.218642e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.78277e-09 ( -2.77577e-09  -7.1048e-10 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.1331  (-6.17582  7.2914)
R^2/D10^2   : 0.163189  (-0.162864   7.61486)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.64 using 59 PHA bins.
# Reduced chi-squared =         0.7481 for     57 degrees of freedom 
# Null hypothesis probability =   9.213176e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.428e-09   2.242e-09
25- 50  8.682e-09   5.680e-09
50-150  4.707e-09   4.309e-09
15-150  1.682e-08   1.117e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 50.6390       (-50.6385      -50.6385)
Norm        : 2.12307       (-1.20419     4.82739)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.15 using 59 PHA bins.
# Reduced chi-squared =         0.7219 for     57 degrees of freedom 
# Null hypothesis probability =   9.436124e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.206e-09   3.381e-09
25- 50  7.511e-09   4.840e-09
50-150  7.380e-09   6.460e-09
15-150  2.010e-08   1.428e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.83743        (-2.83743      26.1158)
R1^2/D10^2  : 30.5619        (-30.5621      -30.5621)
kT2 [keV]   : 13.3886        (-13.3886      -13.3886)
R2^2/D10^2  : 4.61637E-02    (-0.0461638   0.284605)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.07 using 59 PHA bins.
# Reduced chi-squared =         0.7285 for     55 degrees of freedom 
# Null hypothesis probability =   9.348289e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.762e-09   2.691e-09
25- 50  6.710e-09   4.260e-09
50-150  7.182e-09   5.145e-09
15-150  1.965e-08   1.133e-08
Plot creation:
Tue Feb 19 08:20:09 EST 2019