batgrbproduct analysis for trigger=933276

batgrbproduct Analysis for Trigger=933276

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Nov  6 11:10:29 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger933276/GCN5_download_cron
======================================================================

  Trigger: 00933276      Segment: 000

  BAT Trigger Time: 594605361.98   [s; MET]
      Trigger Stop: 594605362.012   [s; MET]
               UTC: 2019-11-05T00:08:58.113480    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 293.742937208376   Dec: 21.9150374428366  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    15.03
     Image Trigger?:     NO
     Rate S/N Ratio:     107.962956610126  [ if not an image trigger ]
     Image S/N Ratio:    15.03

  Flight Position:   [ source = BAT ]
    RA: 293.742937208376   Dec: 21.9150374428366  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 293.743369210987   Dec: 21.9029009835974  [deg; J2000]  
        { 19h 34m 58.4s , +21d 54' 10.4" }
         +/- 1.3277718985611 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.43833388786049 [arcmin] (formal 1-sigma fit error)
    SNR: 20.2874613052206
 
  Angular difference between Flight and Ground position is 0.728585 arcmin
 
  Partial Coding Fraction: 0.3242188    [ including projection effects ]

  Duration
     T90: 0.192000031471252 +/- 0.0320000648498535
        Measured from: -0.0119998455047607
                   to: 0.180000185966492     [s; relative to TRIGTIME]
     T50: 0.0480000972747803 +/- 0.0160000324249268
        Measured from: 0.00400006771087646
                   to: 0.0520001649856567     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.391999959945679     
                   to: 0.608000040054321     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0119999647140503     
                   to: 0.212000012397766     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.250090   0.192137   0.054076  -0.003530
           0.014798   0.013074   0.007819   0.005042 [error]
 Peak      0.265775   0.212918   0.050665  -0.011772
           0.017729   0.016587   0.012245   0.010081 [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 9.08e-08 4.00e-08 1.06e-08 3.45e-09 1.43e-07 1.45e-07   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 2.99e+00 1.54e+00 4.89e-01 1.99e-01 5.13e+00 5.22e+00   ph/cm2/s
              Error 3.50e-01 1.50e-01 9.10e-02 6.63e-02 4.72e-01 4.77e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.85e-08 8.96e-08 2.70e-08 1.29e-09 1.96e-07 1.96e-07   erg/cm2
              Error 1.01e-08 8.82e-09 5.51e-09 7.38e-10 1.59e-08 1.59e-08   erg/cm2
Peak flux Cutoff-PL 2.75e+00 1.78e+00 3.99e-01 2.62e-02 4.95e+00 4.96e+00   ph/cm2/s
              Error 3.92e-01 2.05e-01 1.19e-01 4.11e-02 4.79e-01 4.81e-01   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    3.923    0.000    -      -           3.07e-02 0.00e+00  179.830 57
CPL   1.000    0.000      50.0    0.0      2.42e-02 0.00e+00  458.190 56
 
The chi2 of BB fit is 76.09 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    2.653    0.187    -      -           2.37e-02 3.39e-03   67.800 57
CPL   1.117    0.907      20.5   12.4      2.21e-01 5.50e-01   57.950 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    0.224   -0.012    0.212
T90     0.192   -0.012    0.180
T50     0.048    0.004    0.052
Peak    1.000   -0.392    0.608

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  293.7434 +21.9029 0.0095   33.5  112.5       0.5067    20.3  TRIG_00933276       
------------------------------------------
 
Foreground time interval of the image:
 -0.012   0.212 (delta_t =   0.224 [sec])
Background time interval of the image:
-239.980 -112.580 (delta_t = 127.400 [sec])
-111.980  -0.012 (delta_t = 111.968 [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   -0.012 sec. to    0.212 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.92317     (     )
Norm@50keV  : 3.07297E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         179.83 using 59 PHA bins.
# Reduced chi-squared =         3.1550 for     57 degrees of freedom 
# Null hypothesis probability =   1.194829e-14
 
Photon flux (15-150 keV)    in 0.224 sec: 17.7239 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4347e-07 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.012 sec. to    0.212 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 2.41989E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         458.19 using 59 PHA bins.
# Reduced chi-squared =         8.1820 for     56 degrees of freedom 
# Null hypothesis probability =   1.749220e-64
 
Photon flux (15-150 keV)    in 0.224 sec: 20.0420 ( -1.7425  1.7493 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.96386e-07 ( -1.58691e-08  1.58455e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.012 sec. to    0.212 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.63517   (     )
beta        : -3.92412    (     )
Epeak [keV] : 11.9120      (   )
Norm@50keV   : 4.17374    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         179.83 using 59 PHA bins.
# Reduced chi-squared =         3.2697 for     55 degrees of freedom 
# Null hypothesis probability =   3.597481e-15
 
Photon flux (15-150 keV)    in 0.224 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]    : 7.24254  (-0.599912  0.63939)
R^2/D10^2   : 33.9944  (-10.6661   15.908)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.09 using 59 PHA bins.
# Reduced chi-squared =          1.335 for     57 degrees of freedom 
# Null hypothesis probability =   4.635443e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.638e-08   8.467e-09
25- 50  9.703e-08   9.363e-09
50-150  1.816e-08   4.812e-09
15-150  1.816e-07   1.661e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 20.8604       (-1.71982      1.59759)
Norm        : 245.467       (-30.3802     35.7255)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.07 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     57 degrees of freedom 
# Null hypothesis probability =   1.496964e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.830e-08   8.770e-09
25- 50  7.984e-08   6.899e-09
50-150  2.564e-08   4.377e-09
15-150  1.938e-07   1.523e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.04180        (-0.969722      1.07627)
R1^2/D10^2  : 252.231        (-158.712      649.033)
kT2 [keV]   : 9.83275        (-1.23348      1.1008)
R2^2/D10^2  : 6.25184    (-3.22662   7.48559)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.21 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     55 degrees of freedom 
# Null hypothesis probability =   3.931358e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.144e-08   3.286e-08
25- 50  8.663e-08   2.911e-08
50-150  3.332e-08   1.402e-08
15-150  2.014e-07   6.587e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.392 sec. to    0.608 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.65256     ( -0.180881   0.193177 )
Norm@50keV  : 2.37168E-02    ( -0.00339678   0.00338009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.80 using 59 PHA bins.
# Reduced chi-squared =          1.189 for     57 degrees of freedom 
# Null hypothesis probability =   1.549397e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.13076 ( -0.471725  0.471969 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.48267e-07 ( -2.54648e-08  2.58494e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.392 sec. to    0.608 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11695     ( -1.06068   0.753406 )
Epeak [keV] : 20.5244      ( -17.7702 7.03671 )
Norm@50keV  : 0.221275    ( -0.22127   0.879159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.95 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     56 degrees of freedom 
# Null hypothesis probability =   4.033159e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.95387 ( -0.47921  0.47979 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26629e-07 ( -2.4374e-08  2.5951e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.392 sec. to    0.608 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.11420   ( -0.801454   1.64745 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 20.5442      ( -7.86854 7.07327 )
Norm@50keV   : 0.222181    ( -0.22217   0.87986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.95 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     55 degrees of freedom 
# Null hypothesis probability =   3.671174e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.26917e-07 ( -2.2691e-07  -2.4338e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.28157  (-0.697334  0.763957)
R^2/D10^2   : 8.12553  (-2.84556   4.45066)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.35 using 59 PHA bins.
# Reduced chi-squared =          1.252 for     57 degrees of freedom 
# Null hypothesis probability =   9.569387e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.197e-08   1.037e-08
25- 50  1.063e-07   1.334e-08
50-150  2.027e-08   6.465e-09
15-150  1.985e-07   2.240e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 28.4502       (-4.8973      6.17874)
Norm        : 43.3097       (-7.89492     9.9925)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.12 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     57 degrees of freedom 
# Null hypothesis probability =   4.337056e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.570e-08   1.064e-08
25- 50  9.503e-08   9.880e-09
50-150  4.849e-08   1.432e-08
15-150  2.292e-07   2.450e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.15146        (-1.23909      1.34567)
R1^2/D10^2  : 55.7316        (-36.8986      218.489)
kT2 [keV]   : 10.7396        (-2.10258      3.3798)
R2^2/D10^2  : 1.07157    (-0.821572   1.63521)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.64 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     55 degrees of freedom 
# Null hypothesis probability =   4.134774e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.620e-08   4.398e-08
25- 50  9.468e-08   4.860e-08
50-150  4.539e-08   2.646e-08
15-150  2.263e-07   1.154e-07
Plot creation:
Wed Nov  6 11:15:00 EST 2019