batgrbproduct analysis for trigger=1156572

batgrbproduct Analysis for Trigger=1156572

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Wed Mar  1 05:51:12 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1156572/GCN5_download_cron
======================================================================

  Trigger: 01156572      Segment: 000

  BAT Trigger Time: 699256281.088   [s; MET]
      Trigger Stop: 699256282.112   [s; MET]
               UTC: 2023-02-28T05:50:50.250320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 18.4033334147616   Dec: 44.4885974077295  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.96
     Image Trigger?:     NO
     Rate S/N Ratio:     25.0399680510978  [ if not an image trigger ]
     Image S/N Ratio:    11.96

  Flight Position:   [ source = BAT ]
    RA: 18.4033334147616   Dec: 44.4885974077295  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 18.3968849591233   Dec: 44.4949821250589  [deg; J2000]  
        { 01h 13m 35.3s , +44d 29' 41.9" }
         +/- 1.53061776084976 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.53999659291267 [arcmin] (formal 1-sigma fit error)
    SNR: 16.5585775000289
 
  Angular difference between Flight and Ground position is 0.472154 arcmin
 
  Partial Coding Fraction: 0.7890625    [ including projection effects ]

  Duration
     T90: 2.17999994754791 +/- 0.397471986918358
        Measured from: 0.0800000429153442
                   to: 2.25999999046326     [s; relative to TRIGTIME]
     T50: 0.944000005722046 +/- 0.281538590504795
        Measured from: 0.48800003528595
                   to: 1.432000041008     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.175999999046326     
                   to: 1.17599999904633     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0480000972747803     
                   to: 2.52799999713898     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.181920   0.235670   0.160781   0.029484
           0.020573   0.021962   0.019501   0.015013 [error]
 Peak      0.087111   0.141946   0.116997   0.019913
           0.013064   0.015058   0.014022   0.010125 [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 5.76e-08 9.61e-08 1.22e-07 3.09e-07 3.61e-07 5.84e-07   erg/cm2
              Error 9.04e-09 1.01e-08 1.80e-08 9.19e-08 4.34e-08 1.09e-07   erg/cm2
Peak flux Power-law 9.79e-01 9.95e-01 7.12e-01 8.13e-01 3.01e+00 3.50e+00   ph/cm2/s
              Error 1.82e-01 1.22e-01 1.08e-01 2.40e-01 3.55e-01 4.26e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.22e-08 1.06e-07 1.25e-07 9.81e-08 3.40e-07 3.82e-07   erg/cm2
              Error 1.03e-08 1.36e-08 2.05e-08 -------- 4.68e-08 1.16e-07   erg/cm2
Peak flux Cutoff-PL 8.19e-01 1.10e+00 7.88e-01 3.32e-01 2.93e+00 3.04e+00   ph/cm2/s
              Error 2.17e-01 1.53e-01 1.31e-01 2.58e-01 3.60e-01 4.34e-01   ph/cm2/s
 
Fluence        Band 5.12e-08 1.08e-07 1.20e-07 1.80e-07 3.43e-07 4.59e-07   erg/cm2
              Error 1.04e-08 -------- 2.33e-08 -------- -------- --------   erg/cm2
Peak flux      Band 8.65e-01 1.07e+00 7.73e-01 4.18e-01 2.97e+00 3.13e+00   ph/cm2/s
              Error -------- 1.59e-01 1.22e-01 -------- 3.73e-01 4.58e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.658    0.173    -      -           1.51e-02 1.70e-03   54.320 57
CPL   0.836    0.774      65.7   57.9      4.20e-02 5.04e-02   50.210 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.483    0.189    -      -           2.42e-02 2.96e-03   49.230 57
CPL   0.481    0.874      77.4   55.7      7.70e-02 9.80e-02   44.360 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: 1.024000 sec.
T50 in the 50-300 keV band: 0.448000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    2.576   -0.048    2.528
T90     2.180    0.080    2.260
T50     0.944    0.488    1.432
Peak    1.000    0.176    1.176

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   18.3969 +44.4950 0.0117   30.8  177.7       0.6464    16.6  TRIG_01156572       
------------------------------------------
 
Foreground time interval of the image:
 -0.048   2.528 (delta_t =   2.576 [sec])
Background time interval of the image:
-214.587  -0.048 (delta_t = 214.539 [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   -0.048 sec. to    2.528 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65789     ( -0.170162   0.175086 )
Norm@50keV  : 1.50968E-02    ( -0.0017111   0.00169147 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.32 using 59 PHA bins.
# Reduced chi-squared =         0.9530 for     57 degrees of freedom 
# Null hypothesis probability =   5.761220e-01
 
Photon flux (15-150 keV)    in 2.576 sec: 1.97642 ( -0.206995  0.207095 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.61405e-07 ( -4.31019e-08  4.36021e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.048 sec. to    2.528 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.835713     ( -0.844927   0.702097 )
Epeak [keV] : 65.7239      ( -15.2316 100.532 )
Norm@50keV  : 4.19592E-02    ( -0.0240669   0.0767238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.21 using 59 PHA bins.
# Reduced chi-squared =         0.8967 for     56 degrees of freedom 
# Null hypothesis probability =   6.925814e-01
 
Photon flux (15-150 keV)    in 2.576 sec: 1.92990 ( -0.21103  0.21098 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.40387e-07 ( -4.6368e-08  4.72567e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.048 sec. to    2.528 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.835675   ( -0.637335   0.703679 )
beta        : -10.0000    ( 10   20 )
Epeak [keV] : 65.7112      ( -14.3024 100.407 )
Norm@50keV   : 4.19598E-02    ( -0.0240665   0.0766564 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.21 using 59 PHA bins.
# Reduced chi-squared =         0.9130 for     55 degrees of freedom 
# Null hypothesis probability =   6.577027e-01
 
Photon flux (15-150 keV)    in 2.576 sec: 1.93638 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.4335e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.7953  (-1.50889  1.72299)
R^2/D10^2   : 0.396883  (-0.146053   0.227688)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.20 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     57 degrees of freedom 
# Null hypothesis probability =   2.131771e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.550e-08   6.723e-09
25- 50  1.202e-07   1.731e-08
50-150  1.232e-07   2.670e-08
15-150  2.789e-07   3.702e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 140.400       (-48.9889      -137.38)
Norm        : 8.24068       (-0.966607     1.19763)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.480e-08   9.364e-09
25- 50  1.006e-07   3.087e-08
50-150  1.931e-07   9.502e-08
15-150  3.485e-07   1.305e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.82523        (-2.31001      2.7889)
R1^2/D10^2  : 2.27747        (-1.45619      6.9346)
kT2 [keV]   : 21.4851        (-5.70022      15.4299)
R2^2/D10^2  : 4.36254E-02    (-0.0381401   0.0637262)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.244e-08   2.753e-08
25- 50  1.063e-07   4.343e-08
50-150  1.827e-07   9.911e-08
15-150  3.414e-07   1.650e-07

Peak spectrum fit

Power-law model
Time interval is from    0.176 sec. to    1.176 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.48323     ( -0.185541   0.191548 )
Norm@50keV  : 2.41798E-02    ( -0.0029711   0.00294769 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.23 using 59 PHA bins.
# Reduced chi-squared =         0.8636 for     57 degrees of freedom 
# Null hypothesis probability =   7.583333e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.00518 ( -0.355039  0.355197 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.30024e-07 ( -3.0853e-08  3.11534e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.176 sec. to    1.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.481371     ( -0.957986   0.790743 )
Epeak [keV] : 77.3902      ( -17.9934 93.389 )
Norm@50keV  : 7.69999E-02    ( -0.045478   0.15049 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.36 using 59 PHA bins.
# Reduced chi-squared =         0.7921 for     56 degrees of freedom 
# Null hypothesis probability =   8.692817e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.93229 ( -0.36032  0.36026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.20406e-07 ( -3.2104e-08  3.2501e-08 ) ergs/cm2
 
Band function
Time interval is from    0.176 sec. to    1.176 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.480994   ( -0.469711   1.49092 )
beta        : -10.0000    ( 10   5.32907e-15 )
Epeak [keV] : 77.3624      ( -17.9771 93.3626 )
Norm@50keV   : 7.70392E-02    ( -0.0455207   0.150308 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.36 using 59 PHA bins.
# Reduced chi-squared =         0.8065 for     55 degrees of freedom 
# Null hypothesis probability =   8.470894e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.96672 ( 4.03328  -0.40071 ) 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]    : 15.3353  (-1.9441  2.23839)
R^2/D10^2   : 0.338714  (-0.128228   0.201944)
(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  1.661e-08   3.205e-09
25- 50  6.735e-08   1.147e-08
50-150  1.088e-07   2.596e-08
15-150  1.928e-07   2.975e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-71.1771      -199.362)
Norm        : 12.4162       (-1.44802     1.44954)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.092e-08   8.805e-09
25- 50  5.947e-08   3.274e-08
50-150  1.304e-07   7.230e-08
15-150  2.208e-07   1.190e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.71963        (-4.59645      4.32329)
R1^2/D10^2  : 2.65969        (-2.0071      628.152)
kT2 [keV]   : 21.2240        (-5.30546      12.3389)
R2^2/D10^2  : 8.74525E-02    (-0.074403   0.195328)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.586e-08   1.456e-08
25- 50  6.165e-08   3.153e-08
50-150  1.321e-07   7.590e-08
15-150  2.196e-07   1.133e-07
Plot creation:
Wed Mar  1 05:54:25 EST 2023