batgrbproduct analysis for trigger=1037828

batgrbproduct Analysis for Trigger=1037828

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Mar 21 16:07:22 EDT 2021
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1037828/batgroup_hand_proc
======================================================================

  Trigger: 01037828      Segment: 000

  BAT Trigger Time: 638003657.728   [s; MET]
      Trigger Stop: 638003659.776   [s; MET]
               UTC: 2021-03-21T07:13:51.023260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 87.8737930674534   Dec: 70.119331009023  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.4
     Image Trigger?:     NO
     Rate S/N Ratio:     15.8113883008419  [ if not an image trigger ]
     Image S/N Ratio:    7.4

  Flight Position:   [ source = BAT ]
    RA: 87.8737930674534   Dec: 70.119331009023  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 87.8867199366817   Dec: 70.1092886769822  [deg; J2000]  
        { 05h 51m 32.8s , +70d 06' 33.4" }
         +/- 1.60245081304773 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.566365647838952 [arcmin] (formal 1-sigma fit error)
    SNR: 15.5084643986701
 
  Angular difference between Flight and Ground position is 0.657766 arcmin
 
  Partial Coding Fraction: 0.3046875    [ including projection effects ]

  Duration
     T90: 8.21200001239777 +/- 0.503968260000279
        Measured from: -6.74400007724762
                   to: 1.46799993515015     [s; relative to TRIGTIME]
     T50: 5.30399990081787 +/- 1.16413742646997
        Measured from: -5.25999999046326
                   to: 0.0439999103546143     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -6.99200010299683     
                   to: -5.99200010299683     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -7     
                   to: 1.83599996566772     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.507755   0.492039   0.198536   0.072836
           0.042038   0.043865   0.037782   0.032331 [error]
 Peak      0.076837   0.066475   0.058035   0.018798
           0.013865   0.015284   0.013651   0.011388 [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 1.70e-07 2.10e-07 1.88e-07 2.93e-07 6.69e-07 8.61e-07   erg/cm2
              Error 2.31e-08 2.16e-08 3.57e-08 1.08e-07 8.17e-08 1.50e-07   erg/cm2
Peak flux Power-law 7.58e-01 5.77e-01 2.94e-01 2.14e-01 1.73e+00 1.84e+00   ph/cm2/s
              Error 2.26e-01 1.23e-01 1.11e-01 1.56e-01 3.64e-01 4.00e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.68e-07 2.15e-07 1.84e-07 1.83e-07 6.50e-07 7.49e-07   erg/cm2
              Error 2.42e-08 2.98e-08 4.61e-08 1.55e-07 1.05e-07 2.31e-07   erg/cm2
Peak flux Cutoff-PL 7.71e-01 5.76e-01 2.85e-01 2.01e-01 1.73e+00 1.84e+00   ph/cm2/s
              Error 2.26e-01 1.28e-01 1.09e-01 2.02e-01 3.64e-01 3.96e-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    2.154    0.198    -      -           8.10e-03 1.11e-03   64.200 57
CPL   1.979    0.620       4.6   -0.4      1.04e-02 2.68e-02   64.040 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.975    0.427    -      -           1.17e-02 3.32e-03   60.820 57
CPL   2.024    0.896      12.1    0.0      1.05e-02 0.00e+00   60.720 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    8.836   -7.000    1.836
T90     8.212   -6.744    1.468
T50     5.304   -5.260    0.044
Peak    1.000   -6.992   -5.992

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   87.8867 +70.1093 0.0124   35.0 -109.6       1.2886    15.5  TRIG_01037828       
------------------------------------------
 
Foreground time interval of the image:
 -7.000   1.836 (delta_t =   8.836 [sec])
Background time interval of the image:
-239.728  -7.000 (delta_t = 232.728 [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   -7.000 sec. to    1.836 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15435     ( -0.192139   0.203296 )
Norm@50keV  : 8.09896E-03    ( -0.00112464   0.00109998 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.20     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.39e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 8.836 sec: 1.30945 ( -0.130718  0.130735 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.68833e-07 ( -8.07651e-08  8.25796e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -7.000 sec. to    1.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97883     ( -1.20668   0.0338389 )
Epeak [keV] : 4.56955      ( -3.74776 -4.56955 )
Norm@50keV  : 1.04007E-02    ( -0.0041058   0.0495269 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.04     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.15e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 8.836 sec: 1.29937 ( -0.13793  0.13652 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50371e-07 ( -1.11318e-07  9.77703e-08 ) ergs/cm2
 
Band function
Time interval is from   -7.000 sec. to    1.836 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.91560   ( -14.3726   -4.9156 )
beta        : -2.34244    ( -0.354408   0.247064 )
Epeak [keV] : 21.8174      ( -3.73109 3.39779 )
Norm@50keV   : 3266.84    ( -323.324   17595 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 8.836 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]    : 8.20225  (-0.916533  1.03514)
R^2/D10^2   : 1.29477  (-0.491153   0.79502)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   79.20     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.75e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.417e-07   2.456e-08
25- 50  2.589e-07   3.468e-08
50-150  7.374e-08   2.423e-08
15-150  4.743e-07   6.636e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 47.8767       (-12.0357      18.9988)
Norm        : 7.58158       (-1.3231     1.73307)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.86     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.22e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.621e-07   2.169e-08
25- 50  2.292e-07   2.487e-08
50-150  2.135e-07   6.044e-08
15-150  6.048e-07   8.164e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.09694        (-1.1753      1.07475)
R1^2/D10^2  : 2.14752        (-0.780812      2.02208)
kT2 [keV]   : 69.8633        (-46.8933      -70.3616)
R2^2/D10^2  : 5.96205E-04    (-0.000517272   0.00736666)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.24     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.24e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.578e-07   3.190e-08
25- 50  2.354e-07   5.191e-08
50-150  3.027e-07   1.545e-07
15-150  6.960e-07   1.964e-07

Peak spectrum fit

Power-law model
Time interval is from   -6.992 sec. to   -5.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97469     ( -0.399539   0.453892 )
Norm@50keV  : 1.16545E-02    ( -0.00342785   0.0032058 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.82     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.40e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.72814 ( -0.363978  0.36398 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07348e-07 ( -2.85175e-08  2.97364e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.992 sec. to   -5.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02370     ( -0.402041   1.38899 )
Epeak [keV] : 12.1130      (   )
Norm@50keV  : 1.05009E-02    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.72     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.10e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.72678 ( -0.36376  0.36373 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06987e-07 ( -2.85358e-08  2.9399e-08 ) ergs/cm2
 
Band function
Time interval is from   -6.992 sec. to   -5.992 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.94912   ( -4.94912   -4.94912 )
beta        : -2.11504    ( -0.656901   0.470866 )
Epeak [keV] : 21.1541      ( -21.1541 6.2529 )
Norm@50keV   : 5227.19    ( -1095.36   2.01403e+07 )
------------------------------------------------------------
 
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]    : 7.26328  (-1.83486  3.17445)
R^2/D10^2   : 2.66204  (-1.99903   5.98729)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.81     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.19e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.341e-08   1.213e-08
25- 50  3.439e-08   1.609e-08
50-150  6.502e-09   4.712e-09
15-150  6.430e-08   2.698e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 71.2995       (-38.0379      -71.3512)
Norm        : 8.39664       (-2.50427     4.32239)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.93e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.158e-08   7.100e-09
25- 50  3.451e-08   1.306e-08
50-150  4.493e-08   3.321e-08
15-150  1.010e-07   4.187e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.37835        (-1.51165      2.00876)
R1^2/D10^2  : 7.56846        (-5.36426      22.6886)
kT2 [keV]   : 30.0446        (-13.9962      -30.0461)
R2^2/D10^2  : 1.08033E-02    (-0.0105757   0.0820316)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.48     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.49e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.595e-08   1.438e-08
25- 50  2.843e-08   1.559e-08
50-150  6.104e-08   3.620e-08
15-150  1.154e-07   5.640e-08
Plot creation:
Sun Mar 21 16:11:49 EDT 2021