batgrbproduct analysis for trigger=1007266

batgrbproduct Analysis for Trigger=1007266

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Thu Nov 19 06:31:29 EST 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger1007266/GCN5_download_cron
======================================================================

  Trigger: 01007266      Segment: 000

  BAT Trigger Time: 627376112   [s; MET]
      Trigger Stop: 627376288   [s; MET]
               UTC: 2020-11-18T07:08:05.998020    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 84.7205635396726   Dec: 26.3266571610648  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    26.23
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    26.23

  Flight Position:   [ source = BAT ]
    RA: 84.7205635396726   Dec: 26.3266571610648  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 84.7422254031269   Dec: 26.3325535713531  [deg; J2000]  
        { 05h 38m 58.1s , +26d 19' 57.2" }
         +/- 2.06704731877832 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.04247485414949 [arcmin] (formal 1-sigma fit error)
    SNR: 10.7799757029393
 
  Angular difference between Flight and Ground position is 1.217415 arcmin
 
  Partial Coding Fraction: 0.4492188    [ including projection effects ]

  Duration
     T90: 382.65600001812 +/- 11.4394023176173
        Measured from: -195.579999923706
                   to: 187.076000094414     [s; relative to TRIGTIME]
     T50: 197.09199988842 +/- 4.56400702190695
        Measured from: -70.1519998311996
                   to: 126.94000005722     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 148.672000050545     
                   to: 149.672000050545     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -228.927999973297     
                   to: 201.588000059128     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    80.042737  63.644195   8.927840   0.361284
           0.280460   0.267415   0.182140   0.146859 [error]
 Peak      0.321953   0.247570   0.032652  -0.005981
           0.015492   0.014918   0.009030   0.006665 [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 4.22e-05 2.34e-05 8.18e-06 3.73e-06 7.59e-05 7.76e-05   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 3.72e+00 1.59e+00 4.03e-01 1.26e-01 5.78e+00 5.83e+00   ph/cm2/s
              Error 3.35e-01 1.30e-01 6.26e-02 3.37e-02 4.36e-01 4.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.79e-05 2.76e-05 6.78e-06 2.42e-07 6.25e-05 6.26e-05   erg/cm2
              Error 1.55e-06 5.58e-07 2.68e-07 5.37e-08 1.82e-06 1.82e-06   erg/cm2
Peak flux Cutoff-PL 3.26e+00 2.07e+00 2.40e-01 2.46e-03 5.56e+00 5.56e+00   ph/cm2/s
              Error 3.82e-01 1.92e-01 8.31e-02 4.62e-03 4.41e-01 4.41e-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    3.519    0.000    -      -           1.11e-02 0.00e+00  604.930 57
CPL   0.601    0.270      19.4    2.0      4.89e-01 1.74e-01   50.740 56
 
The chi2 of BB fit is 207.27 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    2.978    0.149    -      -           2.14e-02 2.60e-03   94.980 57
CPL   0.029    1.187      22.5    4.0      1.75e+00 8.22e+00   55.150 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: 1.792000 sec.
T50 in the 50-300 keV band: 0.640000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  430.516 -228.928  201.588
T90   382.656 -195.580  187.076
T50   197.092  -70.152  126.940
Peak    1.000  148.672  149.672

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   84.7422 +26.3326 0.0179   29.3  106.4      29.6789    10.8  TRIG_01007266       
------------------------------------------
 
Foreground time interval of the image:
-228.928 175.001 (delta_t = 403.929 [sec])
Background time interval of the image:
-239.000 -228.928 (delta_t =  10.072 [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 -228.928 sec. to  201.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.51927     (     )
Norm@50keV  : 1.10701E-02    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  604.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.39e-92 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 430.5 sec: 4.54818 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.58864e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -228.928 sec. to  201.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.601248     ( -0.275006   0.264023 )
Epeak [keV] : 19.4283      ( -2.13387 1.86101 )
Norm@50keV  : 0.489275    ( -0.140336   0.206687 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.74     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.74e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 430.5 sec: 3.48104 ( -0.13202  0.13401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.25461e-05 ( -1.81284e-06  1.83092e-06 ) ergs/cm2
 
Band function
Time interval is from -228.928 sec. to  201.588 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.475278   ( -0.333432   0.549069 )
beta        : -5.63196    ( 5.62924   0.954891 )
Epeak [keV] : 20.1457      ( -2.40344 2.61033 )
Norm@50keV   : 0.585489    ( -0.209359   0.681222 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 430.5 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]    : 7.36950  (  )
R^2/D10^2   : 4.78708  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  207.27     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.19e-19 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.891e-05   6.866e-07
25- 50  2.855e-05   5.661e-07
50-150  5.679e-06   2.131e-07
15-150  5.314e-05   1.141e-06
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 19.2405       (-0.425398      0.440019)
Norm        : 49.1708       (-2.33996     2.44464)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   75.81     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.85e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.175e-05   1.005e-06
25- 50  2.697e-05   4.865e-07
50-150  7.563e-06   2.540e-07
15-150  6.628e-05   1.421e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.37723        (-0.443375      0.41369)
R1^2/D10^2  : 15.3942        (-3.52651      5.57409)
kT2 [keV]   : 10.1713        (-0.783691      1.07538)
R2^2/D10^2  : 0.486090    (-0.248626   0.384561)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.13     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.99e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.581e-05   2.226e-06
25- 50  2.792e-05   1.935e-06
50-150  7.138e-06   1.246e-06
15-150  6.087e-05   5.166e-06

Peak spectrum fit

Power-law model
Time interval is from  148.672 sec. to  149.672 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97806     ( -0.144286   0.153366 )
Norm@50keV  : 2.13701E-02    ( -0.00259906   0.0026084 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   94.98     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.19e-03 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 5.78397 ( -0.436248  0.436544 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.54212e-07 ( -2.03202e-08  2.04602e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  148.672 sec. to  149.672 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.91482E-02     ( -1.31186   1.06241 )
Epeak [keV] : 22.5080      ( -5.02169 3.04602 )
Norm@50keV  : 1.75092    ( -2.38444   14.054 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.07e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 5.56427 ( -0.44062  0.44092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.34342e-07 ( -1.8629e-08  1.8942e-08 ) ergs/cm2
 
Band function
Time interval is from  148.672 sec. to  149.672 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.157807   ( -0.94798   1.52199 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 23.0532      ( -5.0034 3.08594 )
Norm@50keV   : 2.37742    ( -2.37736   14.026 )
------------------------------------------------------------
 
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]    : 6.60391  (-0.431225  0.450712)
R^2/D10^2   : 14.3078  (-3.7102   5.11946)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.12     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.98e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.398e-08   1.083e-08
25- 50  1.147e-07   1.070e-08
50-150  1.532e-08   4.265e-09
15-150  2.239e-07   1.795e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 21.7381       (-2.54797      2.92149)
Norm        : 65.1460       (-9.92296     11.9389)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.47     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.19e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.081e-07   1.007e-08
25- 50  1.007e-07   8.755e-09
50-150  3.458e-08   8.840e-09
15-150  2.434e-07   2.065e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.72263        (-3.17526      5.29374)
R1^2/D10^2  : 32.8708        (-22.3447      9974.8)
kT2 [keV]   : 8.51295        (-6.9639      6.42026)
R2^2/D10^2  : 2.75790    (-2.70869   10.4214)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.70     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.86e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.010e-07   5.620e-08
25- 50  1.091e-07   5.660e-08
50-150  2.461e-08   1.457e-08
15-150  2.347e-07   1.192e-07
Plot creation:
Thu Nov 19 06:37:43 EST 2020