batgrbproduct analysis for trigger=1154967

batgrbproduct Analysis for Trigger=1154967

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Feb 18 18:51:13 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1154967/GCN5_download_cron
======================================================================

  Trigger: 01154967      Segment: 000

  BAT Trigger Time: 698363621.68   [s; MET]
      Trigger Stop: 698363621.744   [s; MET]
               UTC: 2023-02-17T21:53:10.903120    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 280.771001700138   Dec: -28.8556023658531  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.87
     Image Trigger?:     NO
     Rate S/N Ratio:     111.458512460915  [ if not an image trigger ]
     Image S/N Ratio:    8.87

  Flight Position:   [ source = BAT ]
    RA: 280.771001700138   Dec: -28.8556023658531  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 280.758979128224   Dec: -28.8397306439623  [deg; J2000]  
        { 18h 43m 02.2s , -28d 50' 23.0" }
         +/- 1.28693917162965 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.407263786251537 [arcmin] (formal 1-sigma fit error)
    SNR: 21.2132359602624
 
  Angular difference between Flight and Ground position is 1.142848 arcmin
 
  Partial Coding Fraction: 0.2148438    [ including projection effects ]

  Duration
     T90: 1.2960000038147 +/- 0.450564136169318
        Measured from: -0.0879999399185181
                   to: 1.20800006389618     [s; relative to TRIGTIME]
     T50: 0.448000073432922 +/- 0.0861627008446912
        Measured from: 0.0559999942779541
                   to: 0.504000067710876     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.24399995803833     
                   to: 0.75600004196167     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.263999938964844     
                   to: 1.75200009346008     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.459616   0.832423   1.114276   0.599047
           0.049233   0.060760   0.066727   0.060053 [error]
 Peak      0.344405   0.673001   1.030380   0.536719
           0.040095   0.053239   0.061423   0.056218 [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-07 4.20e-07 8.47e-07 4.29e-06 2.29e-06 5.72e-06   erg/cm2
              Error 2.35e-08 3.52e-08 6.24e-08 7.35e-07 1.65e-07 7.63e-07   erg/cm2
Peak flux Power-law 3.91e+00 5.80e+00 6.44e+00 1.35e+01 2.02e+01 2.96e+01   ph/cm2/s
              Error 5.88e-01 5.37e-01 4.72e-01 2.13e+00 1.46e+00 2.38e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.67e-07 4.21e-07 8.48e-07 4.25e-06 2.29e-06 5.68e-06   erg/cm2
              Error 1.91e-08 3.58e-08 5.05e-08 1.12e-06 1.64e-07 1.25e-06   erg/cm2
Peak flux Cutoff-PL 3.65e+00 5.86e+00 6.66e+00 1.09e+01 2.01e+01 2.70e+01   ph/cm2/s
              Error 5.57e-01 5.64e-01 6.27e-01 3.55e+00 1.47e+00 4.23e+00   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    0.988    0.119    -      -           1.04e-01 7.13e-03   52.380 57
CPL   0.984    0.121    9999.4    0.0      1.05e-01 2.96e-02   52.390 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.850    0.121    -      -           1.76e-01 1.28e-02   64.420 57
CPL   0.617    0.420     364.3    0.0      2.21e-01 9.22e-02   63.660 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: 0.768000 sec.
T50 in the 50-300 keV band: 0.384000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.016   -0.264    1.752
T90     1.296   -0.088    1.208
T50     0.448    0.056    0.504
Peak    1.000   -0.244    0.756

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  280.7590 -28.8397 0.0091   49.1  -18.0       3.1024    21.2  TRIG_01154967       
------------------------------------------
 
Foreground time interval of the image:
 -0.264   1.752 (delta_t =   2.016 [sec])
Background time interval of the image:
-240.680 -167.550 (delta_t =  73.130 [sec])
-166.680 -111.050 (delta_t =  55.630 [sec])
-109.680 -69.440 (delta_t =  40.240 [sec])
-68.680  -0.264 (delta_t =  68.416 [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   -0.264 sec. to    1.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.987971     ( -0.119911   0.117954 )
Norm@50keV  : 0.104399    ( -0.00714262   0.00711799 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.38 using 59 PHA bins.
# Reduced chi-squared =         0.9190 for     57 degrees of freedom 
# Null hypothesis probability =   6.487224e-01
 
Photon flux (15-150 keV)    in 2.016 sec: 12.0118 ( -0.835896  0.838309 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.28562e-06 ( -1.65182e-07  1.6576e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.264 sec. to    1.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.984373     ( -0.125537   0.117331 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 0.105049    ( -0.00706711   0.0520922 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.39 using 59 PHA bins.
# Reduced chi-squared =         0.9355 for     56 degrees of freedom 
# Null hypothesis probability =   6.124036e-01
 
Photon flux (15-150 keV)    in 2.016 sec: 12.0127 ( -0.8359  0.8341 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.28578e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.264 sec. to    1.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -1.02941    ( -0.130485   0.128494 )
Epeak [keV] : 26.9072      ( -26.9072 5.5187 )
Norm@50keV   : 4551.38    ( -303.387   1.66575e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.06 using 59 PHA bins.
# Reduced chi-squared =         0.9284 for     55 degrees of freedom 
# Null hypothesis probability =   6.258024e-01
 
Photon flux (15-150 keV)    in 2.016 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]    : 24.0276  (-2.26272  2.60416)
R^2/D10^2   : 0.328427  (-0.0891978   0.118355)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         100.53 using 59 PHA bins.
# Reduced chi-squared =         1.7637 for     57 degrees of freedom 
# Null hypothesis probability =   3.316946e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.779e-08   9.143e-09
25- 50  3.767e-07   4.183e-08
50-150  1.620e-06   1.670e-07
15-150  2.065e-06   1.741e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 48.9693       (     )
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.458e-07   2.016e-08
25- 50  4.729e-07   4.838e-08
50-150  1.037e-06   2.532e-07
15-150  1.756e-06   3.017e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.61459        (-1.54163      2.00234)
R1^2/D10^2  : 7.04910        (-3.74686      8.50436)
kT2 [keV]   : 37.7967        (-6.54172      11.464)
R2^2/D10^2  : 7.33813E-02    (-0.0386924   0.057415)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.717e-07   5.541e-08
25- 50  4.201e-07   1.219e-07
50-150  1.744e-06   4.661e-07
15-150  2.336e-06   5.329e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.244 sec. to    0.756 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.849566     ( -0.122136   0.119506 )
Norm@50keV  : 0.176332    ( -0.0128187   0.0127487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.42 using 59 PHA bins.
# Reduced chi-squared =          1.130 for     57 degrees of freedom 
# Null hypothesis probability =   2.330662e-01
 
Photon flux (15-150 keV)    in 1 sec: 20.2416 ( -1.45746  1.45879 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01889e-06 ( -1.52298e-07  1.52569e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.244 sec. to    0.756 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.617135     ( -0.496609   0.343876 )
Epeak [keV] : 364.292      ( -364.292 -364.292 )
Norm@50keV  : 0.221224    ( -0.0542525   0.130187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.66 using 59 PHA bins.
# Reduced chi-squared =          1.137 for     56 degrees of freedom 
# Null hypothesis probability =   2.250480e-01
 
Photon flux (15-150 keV)    in 1 sec: 20.1303 ( -1.4725  1.4736 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01225e-06 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.244 sec. to    0.756 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.892608   ( 0.892608   0.892608 )
beta        : -0.849561    ( -0.119494   0.122178 )
Epeak [keV] : 13.7953      ( -13.7953 -13.7953 )
Norm@50keV   : 0.261562    ( -0.0978546   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.42 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     55 degrees of freedom 
# Null hypothesis probability =   1.802852e-01
 
Photon flux (15-150 keV)    in 1 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]    : 25.6589  (-2.4227  2.8211)
R^2/D10^2   : 0.479421  (-0.128678   0.168057)
(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  5.407e-08   7.890e-09
25- 50  3.108e-07   3.665e-08
50-150  1.511e-06   1.535e-07
15-150  1.876e-06   1.555e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 78.8001       (     )
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.962e-07   1.635e-08
25- 50  3.775e-07   7.340e-08
50-150  8.278e-07   2.835e-07
15-150  1.402e-06   3.734e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.81568        (-2.03077      2.93425)
R1^2/D10^2  : 8.58165        (-5.29789      15.2985)
kT2 [keV]   : 36.6528        (-6.22344      11.6377)
R2^2/D10^2  : 0.148228    (-0.0820505   0.114277)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.204e-07   5.498e-08
25- 50  3.379e-07   1.083e-07
50-150  1.588e-06   4.259e-07
15-150  2.046e-06   5.160e-07
Plot creation:
Sat Feb 18 18:54:26 EST 2023