batgrbproduct analysis for trigger=1153670

batgrbproduct Analysis for Trigger=1153670

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Feb 11 11:36:10 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1153670/GCN5_download_cron
======================================================================

  Trigger: 01153670      Segment: 000

  BAT Trigger Time: 697701166.144   [s; MET]
      Trigger Stop: 697701170.24   [s; MET]
               UTC: 2023-02-10T05:52:15.412220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 50.7449101340774   Dec: 7.15309491256854  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.17
     Image Trigger?:     NO
     Rate S/N Ratio:     8  [ if not an image trigger ]
     Image S/N Ratio:    7.17

  Flight Position:   [ source = BAT ]
    RA: 50.7449101340774   Dec: 7.15309491256854  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 50.8108544079505   Dec: 7.16526165879721  [deg; J2000]  
        { 03h 23m 14.6s , +07d 09' 54.9" }
         +/- 4.38006916638397 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.94578855566917 [arcmin] (formal 1-sigma fit error)
    SNR: 3.68737236303259
 
  Angular difference between Flight and Ground position is 3.993105 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 4.09599995613098 +/- 
        Measured from: 0
                   to: 4.09599995613098     [s; relative to TRIGTIME]
     T50: 4.09599995613098 +/- 
        Measured from: 0
                   to: 4.09599995613098     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 4.09599995613098 second)
        Measured from: 0     
                   to: 4.09599995613098     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 4.09599995613098     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.006404   0.126944   0.050167  -0.004946
           0.023686   0.024796   0.020169   0.016331 [error]
 Peak      0.006404   0.126944   0.050167  -0.004946
           0.023686   0.024796   0.020169   0.016331 [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 1.67e-08 3.05e-08 4.28e-08 1.26e-07 1.23e-07 2.15e-07   erg/cm2
              Error 8.58e-09 1.11e-08 1.78e-08 1.02e-07 4.55e-08 1.20e-07   erg/cm2
Peak flux Power-law 1.31e-01 1.31e-01 9.22e-02 1.03e-01 3.96e-01 4.57e-01   ph/cm2/s
              Error 6.85e-02 4.84e-02 3.76e-02 7.70e-02 1.41e-01 1.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.76e-09 5.77e-08 3.00e-08 6.43e-11 9.16e-08 9.15e-08   erg/cm2
              Error 5.40e-09 1.82e-08 2.19e-08 2.99e-09 3.00e-08 3.01e-08   erg/cm2
Peak flux Cutoff-PL 2.63e-02 2.32e-01 7.81e-02 9.69e-05 3.37e-01 3.37e-01   ph/cm2/s
              Error 4.09e-02 7.62e-02 4.98e-02 3.97e-03 1.09e-01 1.09e-01   ph/cm2/s
 
Fluence        Band 8.09e-09 5.20e-08 4.15e-08 1.59e-09 1.02e-07 1.02e-07   erg/cm2
              Error 5.65e-09 -------- 2.02e-08 3.91e-08 -------- --------   erg/cm2
Peak flux      Band 5.99e-02 2.17e-01 9.94e-02 2.05e-03 3.78e-01 3.78e-01   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    1.516    0.493    -      -           3.16e-03 1.12e-03   66.340 57
CPL  -9.997   -1.201      45.3    5.7      4.00e+03 1.19e+04   54.180 56
 
The chi2 of BB fit is 57.94 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    1.516    0.493    -      -           3.16e-03 1.12e-03   66.340 57
CPL  -9.997   -1.201      45.3    5.7      4.00e+03 1.19e+04   54.180 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    4.096    0.000    4.096
T90     4.096    0.000    4.096
T50     4.096    0.000    4.096
Peak    4.096    0.000    4.096

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   50.8109  +7.1653 0.0523   32.6  157.5       0.1632     3.7  TRIG_01153670       
------------------------------------------
 
Foreground time interval of the image:
  0.000   4.096 (delta_t =   4.096 [sec])
Background time interval of the image:
-239.144 -53.114 (delta_t = 186.030 [sec])
-52.144 -21.844 (delta_t =  30.300 [sec])
-21.144 -14.144 (delta_t =   7.000 [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    0.000 sec. to    4.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51564     ( -0.487207   0.498474 )
Norm@50keV  : 3.15813E-03    ( -0.00112364   0.00111943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.34 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.860349e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.395677 ( -0.139262  0.141741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22554e-07 ( -4.44973e-08  4.64085e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.99726     ( 9.99849   7.59702 )
Epeak [keV] : 45.2860      ( -5.41006 6.03263 )
Norm@50keV  : 4002.53    ( -1303.66   22594.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9675 for     56 degrees of freedom 
# Null hypothesis probability =   5.439596e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.336783 0.333214 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.96988e-16 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -3.7396   -5 )
beta        : -9.37167    ( 9.37167   19.3356 )
Epeak [keV] : 47.6448      ( -8.52732 8.99087 )
Norm@50keV   : 9.99108    ( -2.85174   24.3304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.25 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     55 degrees of freedom 
# Null hypothesis probability =   4.652463e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.377822 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02136e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.5147  (-2.87075  4.05554)
R^2/D10^2   : 8.04157E-02  (-0.0511965   0.111797)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.94 using 59 PHA bins.
# Reduced chi-squared =          1.017 for     57 degrees of freedom 
# Null hypothesis probability =   4.402991e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.274e-08   7.942e-09
25- 50  4.572e-08   2.738e-08
50-150  5.397e-08   3.710e-08
15-150  1.124e-07   6.850e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 147.075       (-91.5599      -148.073)
Norm        : 1.73502       (-0.613736     0.790416)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.750e-08   1.059e-08
25- 50  3.317e-08   2.003e-08
50-150  6.979e-08   4.282e-08
15-150  1.205e-07   7.412e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.117761        (3.28998      -0.117761)
R1^2/D10^2  : 1.42734E+09        (-1.42734e+09      -1.42734e+09)
kT2 [keV]   : 13.5146        (-2.87071      4.05558)
R2^2/D10^2  : 8.04167E-02    (-0.0511974   0.111797)
------------------------------------------------------------
 Reduced chi-squared = 
 
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    0.000 sec. to    4.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51564     ( -0.487207   0.498474 )
Norm@50keV  : 3.15813E-03    ( -0.00112364   0.00111943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.34 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.860349e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.395677 ( -0.139262  0.141741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22554e-07 ( -4.44973e-08  4.64085e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    4.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.99726     ( 9.99849   7.59702 )
Epeak [keV] : 45.2860      ( -5.41006 6.03263 )
Norm@50keV  : 4002.53    ( -1303.66   22594.3 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9675 for     56 degrees of freedom 
# Null hypothesis probability =   5.439596e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.336783 0.333214 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.96988e-16 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    4.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -3.7396   -5 )
beta        : -9.37167    ( 9.37167   19.3356 )
Epeak [keV] : 47.6448      ( -8.52732 8.99087 )
Norm@50keV   : 9.99108    ( -2.85174   24.3304 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.25 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     55 degrees of freedom 
# Null hypothesis probability =   4.652463e-01
 
Photon flux (15-150 keV)    in 4.096 sec: 0.377822 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02136e-07 ( 0  0 ) ergs/cm2
 
Single BB
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.5147  (-2.87075  4.05554)
R^2/D10^2   : 8.04157E-02  (-0.0511965   0.111797)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.274e-08   7.940e-09
25- 50  4.572e-08   2.701e-08
50-150  5.397e-08   3.863e-08
15-150  1.124e-07   7.166e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 147.075       (-91.5599      -148.073)
Norm        : 1.73502       (-0.613736     0.790416)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.750e-08   1.082e-08
25- 50  3.317e-08   1.951e-08
50-150  6.979e-08   4.149e-08
15-150  1.205e-07   7.348e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.117761        (3.28998      -0.117761)
R1^2/D10^2  : 1.42734E+09        (-1.42734e+09      -1.42734e+09)
kT2 [keV]   : 13.5146        (-2.87071      4.05558)
R2^2/D10^2  : 8.04167E-02    (-0.0511974   0.111797)
------------------------------------------------------------
 Reduced chi-squared = 
 
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
Plot creation:
Sat Feb 11 11:40:38 EST 2023