batgrbproduct analysis for trigger=1209398

batgrbproduct Analysis for Trigger=1209398

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Thu Jan 18 09:43:29 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1209398/GCN5_download_cron
======================================================================

  Trigger: 01209398      Segment: 000

  BAT Trigger Time: 727198928   [s; MET]
      Trigger Stop: 727199048   [s; MET]
               UTC: 2024-01-17T15:41:35.251960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 186.220762248019   Dec: -62.7140619668172  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.89
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.89

  Flight Position:   [ source = BAT ]
    RA: 186.220762248019   Dec: -62.7140619668172  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 186.219977317891   Dec: -62.7126952296152  [deg; J2000]  
        { 12h 24m 52.8s , -62d 42' 45.7" }
         +/- 2.68661357219662 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.52024959687158 [arcmin] (formal 1-sigma fit error)
    SNR: 7.41255771775952
 
  Angular difference between Flight and Ground position is 0.084799 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 120 +/- 
        Measured from: 0
                   to: 120     [s; relative to TRIGTIME]
     T50: 120 +/- 
        Measured from: 0
                   to: 120     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 120 second)
        Measured from: 0     
                   to: 120     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 120     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.748913   0.393699   0.058826  -0.008365
           0.069923   0.068952   0.057666   0.048814 [error]
 Peak      0.748913   0.393699   0.058826  -0.008365
           0.069923   0.068952   0.057666   0.048814 [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 1.92e-07 1.61e-07 9.18e-08 7.77e-08 4.80e-07 5.23e-07   erg/cm2
              Error 3.12e-08 3.27e-08 3.71e-08 5.66e-08 9.58e-08 1.26e-07   erg/cm2
Peak flux Power-law 5.32e-02 2.50e-02 7.11e-03 2.54e-03 8.67e-02 8.78e-02   ph/cm2/s
              Error 8.78e-03 4.85e-03 2.79e-03 1.74e-03 1.32e-02 1.35e-02   ph/cm2/s
 
Fluence   Cutoff-PL 2.14e-07 1.60e-07 1.68e-09 2.81e-15 3.75e-07 3.75e-07   erg/cm2
              Error 3.67e-08 3.57e-08 5.94e-09 3.82e-12 6.02e-08 6.02e-08   erg/cm2
Peak flux Cutoff-PL 5.64e-02 2.72e-02 1.62e-04 1.42e-10 8.38e-02 8.38e-02   ph/cm2/s
              Error 1.01e-02 7.18e-03 5.46e-04 1.87e-07 1.23e-02 1.23e-02   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    2.811    0.350    -      -           3.60e-04 1.10e-04   77.870 57
CPL  -6.067   -0.946      23.2    2.1      1.64e+03 9.96e+05   59.790 56
 
The chi2 of BB fit is 63.05 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    2.811    0.350    -      -           3.60e-04 1.10e-04   77.870 57
CPL  -6.067   -0.946      23.2    2.1      1.64e+03 8.14e+05   59.790 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  120.000    0.000  120.000
T90   120.000    0.000  120.000
T50   120.000    0.000  120.000
Peak  120.000    0.000  120.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  186.2200 -62.7127 0.0260    4.4   45.7       1.4077     7.4  TRIG_01209398       
------------------------------------------
 
Foreground time interval of the image:
  0.000 120.000 (delta_t = 120.000 [sec])
Background time interval of the image:

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  120.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.81129     ( -0.328342   0.371395 )
Norm@50keV  : 3.60463E-04    ( -0.000106477   0.000113652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.87 using 59 PHA bins.
# Reduced chi-squared =          1.366 for     57 degrees of freedom 
# Null hypothesis probability =   3.454223e-02
 
Photon flux (15-150 keV)    in 120 sec: 8.67290E-02 ( -0.0131449  0.0131815 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7951e-07 ( -9.22974e-08  9.9348e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.06700     ( 4.81771   2.9263 )
Epeak [keV] : 23.1614      ( -2.05919 2.16999 )
Norm@50keV  : 1637.10    ( -1760.14   1.98935e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.79 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     56 degrees of freedom 
# Null hypothesis probability =   3.398139e-01
 
Photon flux (15-150 keV)    in 120 sec: 8.37733E-02 ( -0.0122576  0.0122973 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.75356e-07 ( -5.8752e-08  6.15936e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  120.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -2.72728   -5 )
beta        : -8.07998    ( 8.08293   4.14952 )
Epeak [keV] : 22.9896      ( -1.94851 2.1026 )
Norm@50keV   : 254.532    ( -35.3118   245.139 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.96 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     55 degrees of freedom 
# Null hypothesis probability =   3.006637e-01
 
Photon flux (15-150 keV)    in 120 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]    : 5.51286  (-0.635092  0.716098)
R^2/D10^2   : 0.497467  (-0.210545   0.367312)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.05 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.711371e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.112e-07   5.268e-08
25- 50  1.742e-07   4.517e-08
50-150  1.113e-08   7.078e-09
15-150  3.966e-07   9.054e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 18.5621       (-4.48935      6.60067)
Norm        : 1.17045       (-0.35307     0.530115)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.039e-07   3.870e-08
25- 50  1.683e-07   4.513e-08
50-150  4.433e-08   2.831e-08
15-150  4.165e-07   9.426e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 4.49340E-06        (-4.26949e-06      3.88974e-05)
kT2 [keV]   : 5.40400        (-0.622557      0.701675)
R2^2/D10^2  : 0.535170    (-0.227107   0.397969)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.109e-07   2.660e+00
25- 50  1.749e-07   2.261e+01
50-150  1.129e-08   6.012e+02
15-150  3.970e-07   6.204e+02

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to  120.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.81129     ( -0.328342   0.371395 )
Norm@50keV  : 3.60463E-04    ( -0.000106477   0.000113652 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.87 using 59 PHA bins.
# Reduced chi-squared =          1.366 for     57 degrees of freedom 
# Null hypothesis probability =   3.454223e-02
 
Photon flux (15-150 keV)    in 120 sec: 8.67290E-02 ( -0.0131449  0.0131815 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7951e-07 ( -9.22974e-08  9.9348e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  120.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.06700     ( 4.81771   2.9263 )
Epeak [keV] : 23.1614      ( -2.05919 2.16999 )
Norm@50keV  : 1637.10    ( -1760.14   1.6261e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.79 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     56 degrees of freedom 
# Null hypothesis probability =   3.398139e-01
 
Photon flux (15-150 keV)    in 120 sec: 8.37733E-02 ( -0.0122576  0.0122973 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.75356e-07 ( -5.8752e-08  6.15936e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  120.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -2.72728   -5 )
beta        : -8.07998    ( 8.08293   4.14952 )
Epeak [keV] : 22.9896      ( -1.94851 2.1026 )
Norm@50keV   : 254.532    ( -35.3118   245.139 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.96 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     55 degrees of freedom 
# Null hypothesis probability =   3.006637e-01
 
Photon flux (15-150 keV)    in 120 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 5.51286  (-0.635092  0.716098)
R^2/D10^2   : 0.497467  (-0.210545   0.367312)
(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  2.112e-07   5.322e-08
25- 50  1.742e-07   4.825e-08
50-150  1.113e-08   6.783e-09
15-150  3.966e-07   9.318e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 18.5621       (-4.48935      6.60067)
Norm        : 1.17045       (-0.35307     0.530115)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.039e-07   3.912e-08
25- 50  1.683e-07   4.556e-08
50-150  4.433e-08   2.789e-08
15-150  4.165e-07   9.768e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 4.49340E-06        (-4.26949e-06      3.88974e-05)
kT2 [keV]   : 5.40400        (-0.622557      0.701675)
R2^2/D10^2  : 0.535170    (-0.227107   0.397969)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.109e-07   3.100e+00
25- 50  1.749e-07   2.363e+01
50-150  1.129e-08   6.264e+02
15-150  3.970e-07   5.671e+02
Plot creation:
Thu Jan 18 09:45:29 EST 2024