batgrbproduct analysis for trigger=1000668

batgrbproduct Analysis for Trigger=1000668

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Oct 18 22:02:27 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger1000668/GCN5_download_cron
======================================================================

  Trigger: 01000668      Segment: 000

  BAT Trigger Time: 624662448   [s; MET]
      Trigger Stop: 624662512   [s; MET]
               UTC: 2020-10-17T21:20:22.177060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 135.571786634863   Dec: -40.5106334066564  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    16.99
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.99

  Flight Position:   [ source = BAT ]
    RA: 135.571786634863   Dec: -40.5106334066564  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 135.60906574516   Dec: -40.4754794959245  [deg; J2000]  
        { 09h 02m 26.2s , -40d 28' 31.7" }
         +/- 5.84343112369313 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.78910125872411 [arcmin] (formal 1-sigma fit error)
    SNR: 2.44274695649187
 
  Angular difference between Flight and Ground position is 2.709670 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 390.304000020027 +/- 668.522510554029
        Measured from: -175.895999908447
                   to: 214.40800011158     [s; relative to TRIGTIME]
     T50: 152.192000031471 +/- 15.9849049285725
        Measured from: -51.0959998369217
                   to: 101.09600019455     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -168.628000020981     
                   to: -167.628000020981     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -193.768000006676     
                   to: 876.200000047684     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    29.578411  17.723790   0.625779  -0.010755
           0.245908   0.241242   0.200144   0.182793 [error]
 Peak      0.074680   0.041515   0.007989   0.008334
           0.008300   0.007797   0.005974   0.005606 [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 1.20e-05 5.93e-06 1.80e-06 6.96e-07 2.01e-05 2.04e-05   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 6.52e-01 2.85e-01 7.44e-02 2.40e-02 1.03e+00 1.04e+00   ph/cm2/s
              Error 1.23e-01 6.60e-02 3.50e-02 1.97e-02 1.79e-01 1.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.53e-06 7.04e-06 3.86e-07 1.89e-10 1.60e-05 1.60e-05   erg/cm2
              Error 6.57e-07 2.24e-07 8.36e-08 2.59e-10 7.17e-07 7.17e-07   erg/cm2
Peak flux Cutoff-PL 6.82e-01 3.19e-01 6.03e-03 3.55e-07 1.01e+00 1.01e+00   ph/cm2/s
              Error 1.37e-01 9.45e-02 1.96e-02 3.43e-04 1.72e-01 1.72e-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    3.718    0.000    -      -           1.04e-03 0.00e+00  342.250  0
CPL  -2.211    0.847      22.0    1.3      9.05e+00 1.92e+01   51.410  0
 
The chi2 of BB fit is 51.86 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    2.938    0.420    -      -           3.90e-03 1.43e-03   51.250  0
CPL  -2.975    0.613      21.9    3.2      9.88e+01 8.48e+06   44.740  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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100 1069.970 -193.768  876.200
T90   390.304 -175.896  214.408
T50   152.192  -51.096  101.096
Peak    1.000 -168.628 -167.628

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  135.6091 -40.4755 0.0784    0.1 -172.6      11.5530     2.4  TRIG_01000668       
------------------------------------------
 
Foreground time interval of the image:
-193.768 876.200 (delta_t = 1069.968 [sec])
Background time interval of the image:
-203.299 -193.768 (delta_t =   9.531 [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 -193.768 sec. to  876.200 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.71842     (     )
Norm@50keV  : 1.03823E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  342.25     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.60e-42 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1070 sec: 0.502944 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01043e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -193.768 sec. to  876.200 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.21142     ( -0.942479   0.75164 )
Epeak [keV] : 21.9547      ( -1.37957 1.30158 )
Norm@50keV  : 9.05000    ( -9.44991   28.927 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.41     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.49e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1070 sec: 0.389875 ( -0.021526  0.021814 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59548e-05 ( -7.13583e-07  7.19468e-07 ) ergs/cm2
 
Band function
Time interval is from -193.768 sec. to  876.200 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.50881   (     )
beta        : -7.52026    (     )
Epeak [keV] : 7.19763      (   )
Norm@50keV   : 2.86422E-02    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1070 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]    : 5.43313  (-0.121963  0.125204)
R^2/D10^2   : 2.45334  (-0.296819   0.337422)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.86     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.68e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.801e-06   4.596e-07
25- 50  7.016e-06   2.135e-07
50-150  4.200e-07   4.815e-08
15-150  1.624e-05   5.082e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 13.2839       (      )
Norm        : 9.81540       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  127.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.81e-07 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.088e-05   6.859e-07
25- 50  6.592e-06   2.520e-07
50-150  9.062e-07   8.448e-08
15-150  1.838e-05   8.935e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.41781        (-0.121963      0.125204)
R1^2/D10^2  : 2.48693        (-0.296819      0.337422)
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 1.06342E-06    (-1.06342e-06   -1.06342e-06)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.85     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.34e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model
Time interval is from -168.628 sec. to -167.628 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.93765     ( -0.385618   0.454841 )
Norm@50keV  : 3.90312E-03    ( -0.00138171   0.00148762 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.25     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.90e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.02618 ( -0.179313  0.179668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.56007e-08 ( -9.97505e-09  1.07009e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -168.628 sec. to -167.628 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.97517     ( 1.78709   3.01243 )
Epeak [keV] : 21.8866      ( -2.4846 3.91079 )
Norm@50keV  : 98.7521    ( -103.976   1.69657e+07 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.74     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.60e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.00716 ( -0.171452  0.1719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.77766e-08 ( -7.0685e-09  7.6067e-09 ) ergs/cm2
 
Band function
Time interval is from -168.628 sec. to -167.628 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.96350   ( 0.822496   2.9635 )
beta        : -2.93759    ( -0.455053   0.385621 )
Epeak [keV] : 52.5347      ( -52.5347 -52.5347 )
Norm@50keV   : 0.530517    ( -0.187793   0.202189 )
------------------------------------------------------------
 
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]    : 5.37628  (-0.753269  0.849616)
R^2/D10^2   : 6.54540  (-3.19094   6.48682)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.76e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.110e-08   7.287e-09
25- 50  1.641e-08   5.873e-09
50-150  9.368e-10   6.878e-10
15-150  3.844e-08   1.104e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 17.4972       (-4.90212      7.32146)
Norm        : 14.9771       (-5.25474     8.04355)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.00e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.055e-08   5.375e-09
25- 50  1.614e-08   5.595e-09
50-150  3.823e-09   2.828e-09
15-150  4.051e-08   1.030e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.27765        (-0.761924      0.84184)
R1^2/D10^2  : 7.02595        (-3.19104      6.49066)
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 4.13186E-05    (-4.13186e-05   -4.13186e-05)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.72e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.107e-08   2.911e-06
25- 50  1.646e-08   2.847e-06
50-150  9.481e-10   3.046e-07
15-150  3.848e-08   5.445e-06
Plot creation:
Sun Oct 18 22:07:31 EDT 2020