batgrbproduct analysis for trigger=1000926

batgrbproduct Analysis for Trigger=1000926

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Wed Oct 21 21:08:39 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger1000926/GCN5_download_cron
======================================================================

  Trigger: 01000926      Segment: 000

  BAT Trigger Time: 624865672   [s; MET]
      Trigger Stop: 624865736   [s; MET]
               UTC: 2020-10-20T05:47:26.163700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 261.246012461438   Dec: 31.4249402594  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.2
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.2

  Flight Position:   [ source = BAT ]
    RA: 261.246012461438   Dec: 31.4249402594  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 261.239264424483   Dec: 31.4281113963921  [deg; J2000]  
        { 17h 24m 57.4s , +31d 25' 41.2" }
         +/- 1.13667782485652 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.378815165909722 [arcmin] (formal 1-sigma fit error)
    SNR: 25.3300704556366
 
  Angular difference between Flight and Ground position is 0.394418 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 14.3639999628067 +/- 4.75024429939659
        Measured from: 11.1800000667572
                   to: 25.5440000295639     [s; relative to TRIGTIME]
     T50: 5.14399993419647 +/- 0.667892212469055
        Measured from: 14.7040001153946
                   to: 19.8480000495911     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.1720000505447     
                   to: 18.1720000505447     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 7.85599994659424     
                   to: 30.1720000505447     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.789958   0.700754   0.326169   0.018622
           0.043187   0.039891   0.032630   0.026837 [error]
 Peak      0.083174   0.097212   0.057148   0.008122
           0.009837   0.009720   0.007855   0.005777 [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 2.54e-07 2.95e-07 2.45e-07 3.44e-07 9.18e-07 1.14e-06   erg/cm2
              Error 2.52e-08 2.00e-08 3.12e-08 8.66e-08 7.05e-08 1.22e-07   erg/cm2
Peak flux Power-law 9.09e-01 7.07e-01 3.69e-01 2.78e-01 2.11e+00 2.26e+00   ph/cm2/s
              Error 1.47e-01 7.87e-02 6.29e-02 8.98e-02 2.37e-01 2.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.51e-07 3.00e-07 2.43e-07 2.53e-07 9.03e-07 1.05e-06   erg/cm2
              Error 2.77e-08 2.49e-08 3.37e-08 -------- 8.37e-08 1.96e-07   erg/cm2
Peak flux Cutoff-PL 8.35e-01 7.80e-01 3.71e-01 1.02e-01 2.06e+00 2.09e+00   ph/cm2/s
              Error 1.67e-01 1.09e-01 7.32e-02 1.22e-01 2.43e-01 2.66e-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    2.264    0.141    -      -           4.33e-03 3.93e-04   45.400  0
CPL   1.995    0.236       0.8    0.6      6.16e-03 9.24e-04   45.250  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.939    0.195    -      -           1.45e-02 1.90e-03   47.420  0
CPL   1.099    0.925      46.0   55.1      4.35e-02 8.38e-02   44.450  0
 
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: 7.616000 sec.
T50 in the 50-300 keV band: 2.880000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   22.316    7.856   30.172
T90    14.364   11.180   25.544
T50     5.144   14.704   19.848
Peak    1.000   17.172   18.172

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  261.2393 +31.4281 0.0076   26.3    1.5       1.9472    25.3  TRIG_01000926       
------------------------------------------
 
Foreground time interval of the image:
  7.856  30.172 (delta_t =  22.316 [sec])
Background time interval of the image:
-239.000   7.856 (delta_t = 246.856 [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    7.856 sec. to   30.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26372     ( -0.138018   0.143423 )
Norm@50keV  : 4.33325E-03    ( -0.000396158   0.000389705 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.40     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.66e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 22.32 sec: 0.742290 ( -0.0510935  0.0511757 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.18341e-07 ( -7.00571e-08  7.09198e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    7.856 sec. to   30.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99505     ( -0.467845   0.00345301 )
Epeak [keV] : 0.776277      ( -0.296313 0.869654 )
Norm@50keV  : 6.15816E-03    ( -0.000842222   0.00100491 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.25     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.47e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 22.32 sec: 0.736272 ( -0.054401  0.054361 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.03248e-07 ( -8.49946e-08  8.25036e-08 ) ergs/cm2
 
Band function
Time interval is from    7.856 sec. to   30.172 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.06197   ( 1.03657   1.03657 )
beta        : -2.37495    ( 2.37602   0.204674 )
Epeak [keV] : 22.1991      ( -22.4005 6.70528 )
Norm@50keV   : 2.99449E-02    ( -0.0352756   1837.06 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 22.32 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]    : 8.43932  (-0.703745  0.779877)
R^2/D10^2   : 0.619660  (-0.187862   0.268137)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   97.41     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.87e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.848e-07   2.219e-08
25- 50  3.542e-07   2.835e-08
50-150  1.105e-07   2.407e-08
15-150  6.495e-07   5.881e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 46.2890       (-8.11771      11.0786)
Norm        : 4.28307       (-0.558083     0.681497)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.36e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.293e-07   2.166e-08
25- 50  3.202e-07   2.344e-08
50-150  2.885e-07   5.390e-08
15-150  8.380e-07   6.863e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.57359        (-0.830055      0.866496)
R1^2/D10^2  : 2.69762        (-1.16225      2.45938)
kT2 [keV]   : 20.4471        (-4.47563      7.39281)
R2^2/D10^2  : 1.21870E-02    (-0.00837114   0.0212646)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.48     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.69e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.435e-07   4.466e-08
25- 50  2.974e-07   5.877e-08
50-150  3.539e-07   1.650e-07
15-150  8.948e-07   2.538e-07

Peak spectrum fit

Power-law model
Time interval is from   17.172 sec. to   18.172 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93872     ( -0.190064   0.199741 )
Norm@50keV  : 1.44741E-02    ( -0.00192277   0.00188452 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.13e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.11217 ( -0.237176  0.237313 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33158e-07 ( -1.70239e-08  1.72633e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   17.172 sec. to   18.172 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09923     ( -1.02042   0.829799 )
Epeak [keV] : 45.9702      ( -16.5194 93.7532 )
Norm@50keV  : 4.35477E-02    ( -0.0435516   0.124148 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.45     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.67e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.06067 ( -0.24255  0.24273 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24393e-07 ( -1.8432e-08  1.9209e-08 ) ergs/cm2
 
Band function
Time interval is from   17.172 sec. to   18.172 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.97383   ( -3.53618   -0.597742 )
beta        : -2.22590    ( -1.82119   0.318926 )
Epeak [keV] : 28.9580      ( -9.09046 36.0166 )
Norm@50keV   : 7.80273    ( -7.59887   655.329 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25396e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.5156  (-1.3176  1.50836)
R^2/D10^2   : 0.833489  (-0.334262   0.556262)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.90     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.42e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.906e-08   3.745e-09
25- 50  5.079e-08   7.475e-09
50-150  3.061e-08   8.625e-09
15-150  1.005e-07   1.434e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 73.4917       (-20.9499      35.5075)
Norm        : 10.3018       (-1.67243     2.03636)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.57     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.85e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.656e-08   4.255e-09
25- 50  4.280e-08   5.020e-09
50-150  5.696e-08   2.148e-08
15-150  1.263e-07   2.155e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.93356        (-1.77198      2.32195)
R1^2/D10^2  : 4.62476        (-2.9606      12.0466)
kT2 [keV]   : 17.8148        (-4.59302      14.3343)
R2^2/D10^2  : 7.71042E-02    (-0.0701272   0.12083)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.66     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.65e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.620e-08   1.428e-08
25- 50  4.328e-08   2.271e-08
50-150  5.363e-08   3.044e-08
15-150  1.231e-07   6.172e-08
Plot creation:
Wed Oct 21 21:12:10 EDT 2020