batgrbproduct analysis for trigger=1031297

batgrbproduct Analysis for Trigger=1031297

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Mon Feb  8 20:28:37 EST 2021
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1031297/GCN5_download_cron
======================================================================

  Trigger: 01031297      Segment: 000

  BAT Trigger Time: 634427554.624   [s; MET]
      Trigger Stop: 634427555.136   [s; MET]
               UTC: 2021-02-07T21:52:08.156240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 270.582286117508   Dec: 53.6941953675612  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.59
     Image Trigger?:     NO
     Rate S/N Ratio:     17.7482393492988  [ if not an image trigger ]
     Image S/N Ratio:    9.59

  Flight Position:   [ source = BAT ]
    RA: 270.582286117508   Dec: 53.6941953675612  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 270.613645394012   Dec: 53.700303095851  [deg; J2000]  
        { 18h 02m 27.3s , +53d 42' 01.1" }
         +/- 1.42988979197925 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.536985441108581 [arcmin] (formal 1-sigma fit error)
    SNR: 18.2497774101764
 
  Angular difference between Flight and Ground position is 1.172708 arcmin
 
  Partial Coding Fraction: 0.5625    [ including projection effects ]

  Duration
     T90: 95.691999912262 +/- 4.51693707910054
        Measured from: 1.63600015640259
                   to: 97.3280000686646     [s; relative to TRIGTIME]
     T50: 34.4919999837875 +/- 6.66298912205181
        Measured from: 18.256000161171
                   to: 52.7480001449585     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 43.1560000181198     
                   to: 44.1560000181198     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.251999974250793     
                   to: 106.404000043869     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.368569   2.087696   2.007926   0.737156
           0.071619   0.074467   0.067098   0.059513 [error]
 Peak      0.058941   0.130582   0.154943   0.068608
           0.007300   0.008705   0.009159   0.008361 [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 4.12e-07 9.07e-07 1.57e-06 6.34e-06 4.30e-06 9.23e-06   erg/cm2
              Error 3.32e-08 4.21e-08 6.64e-08 6.42e-07 1.69e-07 6.68e-07   erg/cm2
Peak flux Power-law 6.00e-01 8.94e-01 9.96e-01 2.10e+00 3.12e+00 4.59e+00   ph/cm2/s
              Error 8.99e-02 7.98e-02 7.12e-02 3.42e-01 2.13e-01 3.67e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.10e-07 9.09e-07 1.57e-06 6.28e-06 4.30e-06 9.00e-06   erg/cm2
              Error 3.41e-08 4.19e-08 6.60e-08 8.29e-07 1.68e-07 1.04e-06   erg/cm2
Peak flux Cutoff-PL 6.00e-01 8.95e-01 9.97e-01 2.08e+00 3.12e+00 4.58e+00   ph/cm2/s
              Error 8.98e-02 8.08e-02 8.09e-02 5.73e-01 2.13e-01 5.86e-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    1.205    0.071    -      -           3.98e-03 1.49e-04   53.920 57
CPL   1.203    0.100    9999.3    0.0      4.00e-03 4.47e-04   53.970 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.844    0.124    -      -           2.72e-02 1.87e-03   62.790 57
CPL   0.838    0.139    9999.4    0.0      2.74e-02 8.85e-03   62.790 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: 94.592000 sec.
T50 in the 50-300 keV band: 27.712000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  106.656   -0.252  106.404
T90    95.692    1.636   97.328
T50    34.492   18.256   52.748
Peak    1.000   43.156   44.156

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  270.6136 +53.7003 0.0105   32.9   17.1       0.9984    18.2  TRIG_01031297       
------------------------------------------
 
Foreground time interval of the image:
 -0.252   9.277 (delta_t =   9.529 [sec])
Background time interval of the image:
-172.523  -0.252 (delta_t = 172.271 [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   -0.252 sec. to  106.404 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20494     ( -0.0709771   0.0704447 )
Norm@50keV  : 3.98110E-03    ( -0.000148699   0.000148418 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.91e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 106.7 sec: 0.467628 ( -0.0187751  0.0188556 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.30363e-06 ( -1.68825e-07  1.69266e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.252 sec. to  106.404 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20323     ( -0.131757   0.0687962 )
Epeak [keV] : 9999.34      ( -9999.36 -9999.36 )
Norm@50keV  : 3.99804E-03    ( -0.000147637   0.000746188 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.52e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 106.7 sec: 0.467416 ( -0.018767  0.018818 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.30176e-06 ( -1.66986e-07  1.69717e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.252 sec. to  106.404 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.954571   ( 0.954576   0.954576 )
beta        : -1.20493    ( -0.0704417   0.0709806 )
Epeak [keV] : 48.4519      ( -48.4499 -48.4499 )
Norm@50keV   : 7.37159E-03    ( -0.00277316   21.5842 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 106.7 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]    : 20.3652  (  )
R^2/D10^2   : 1.96338E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  213.06     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.24e-20 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.663e-07   1.339e-08
25- 50  8.381e-07   5.244e-08
50-150  2.583e-06   1.617e-07
15-150  3.587e-06   1.601e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 1.99088       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  134.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.87e-08 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.290e-07   2.150e-08
25- 50  1.018e-06   4.156e-08
50-150  2.232e-06   9.230e-08
15-150  3.778e-06   1.547e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.02733        (-1.36434      1.50245)
R1^2/D10^2  : 0.183897        (-0.0668036      0.123842)
kT2 [keV]   : 40.1526        (-7.27646      13.7977)
R2^2/D10^2  : 1.91221E-03    (-0.00105776   0.00163608)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.80     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.46e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.541e-07   4.983e-08
25- 50  9.550e-07   9.005e-08
50-150  3.032e-06   5.111e-07
15-150  4.341e-06   6.087e-07

Peak spectrum fit

Power-law model
Time interval is from   43.156 sec. to   44.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.844438     ( -0.125416   0.122763 )
Norm@50keV  : 2.72190E-02    ( -0.00187578   0.00186652 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.79e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.12476 ( -0.213129  0.213484 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1229e-07 ( -2.31183e-08  2.32511e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   43.156 sec. to   44.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.838319     ( -0.155448   0.123385 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.74087E-02    ( -0.00191146   0.0157921 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.48e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.12418 ( -0.21337  0.21294 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12208e-07 ( -2.3668e-08  2.3309e-08 ) ergs/cm2
 
Band function
Time interval is from   43.156 sec. to   44.156 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.839916   ( 0.840061   0.840061 )
beta        : -0.844439    ( -0.122736   0.125483 )
Epeak [keV] : 17.4708      ( -17.4686 -17.4686 )
Norm@50keV   : 3.77158E-02    ( -0.013717   728705 )
------------------------------------------------------------
 
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]    : 25.0748  (-2.46761  2.89402)
R^2/D10^2   : 7.70456E-02  (-0.021162   0.0279786)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   98.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.22e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.402e-09   1.243e-09
25- 50  4.774e-08   5.060e-09
50-150  2.225e-07   2.450e-08
15-150  2.786e-07   2.665e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 12.2173       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  149.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.70e-10 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.042e-08   2.405e-09
25- 50  5.852e-08   8.535e-09
50-150  1.284e-07   6.060e-08
15-150  2.173e-07   4.185e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.32809        (-2.66187      3.85087)
R1^2/D10^2  : 1.11392        (-0.703522      2.81814)
kT2 [keV]   : 39.1022        (-8.52167      26.1139)
R2^2/D10^2  : 1.87876E-02    (-0.0137289   0.0175934)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.19     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.85e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.814e-08   8.346e-09
25- 50  5.246e-08   1.762e-08
50-150  2.452e-07   8.734e-08
15-150  3.158e-07   9.495e-08
Plot creation:
Mon Feb  8 20:33:36 EST 2021