batgrbproduct analysis for trigger=1152509

batgrbproduct Analysis for Trigger=1152509

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Feb  5 12:17:09 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1152509/GCN5_download_cron
======================================================================

  Trigger: 01152509      Segment: 000

  BAT Trigger Time: 697172248   [s; MET]
      Trigger Stop: 697172312   [s; MET]
               UTC: 2023-02-04T02:56:57.304260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 238.16447566395   Dec: -50.8579554299044  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.78
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.78

  Flight Position:   [ source = BAT ]
    RA: 238.16447566395   Dec: -50.8579554299044  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 238.165741529951   Dec: -50.8479983071546  [deg; J2000]  
        { 15h 52m 39.8s , -50d 50' 52.8" }
         +/- 2.42438130448197 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.36199316685874 [arcmin] (formal 1-sigma fit error)
    SNR: 8.58397581322514
 
  Angular difference between Flight and Ground position is 0.599348 arcmin
 
  Partial Coding Fraction: 0.4882812    [ including projection effects ]

  Duration
     T90: 182.048000097275 +/- 16.7342808965704
        Measured from: -0.791999936103821
                   to: 181.256000161171     [s; relative to TRIGTIME]
     T50: 101.37600004673 +/- 14.6298894554681
        Measured from: 52.9200000762939
                   to: 154.296000123024     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 148.12399995327     
                   to: 149.12399995327     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.80799996852875     
                   to: 195.62399995327     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.959700   2.464364   1.608001   0.283877
           0.170773   0.160279   0.135468   0.113254 [error]
 Peak      0.024353   0.044844   0.042274   0.019939
           0.010767   0.010077   0.008795   0.007443 [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 6.33e-07 1.02e-06 1.24e-06 2.94e-06 3.73e-06 5.83e-06   erg/cm2
              Error 7.71e-08 7.70e-08 1.33e-07 6.63e-07 3.13e-07 7.77e-07   erg/cm2
Peak flux Power-law 1.99e-01 2.70e-01 2.71e-01 4.89e-01 8.98e-01 1.23e+00   ph/cm2/s
              Error 1.21e-01 9.69e-02 6.74e-02 3.15e-01 2.40e-01 3.17e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.93e-07 1.07e-06 1.25e-06 1.44e-06 3.57e-06 4.35e-06   erg/cm2
              Error 8.96e-08 7.37e-08 1.43e-07 1.25e-06 3.57e-07 1.40e-06   erg/cm2
Peak flux Cutoff-PL 2.10e-01 2.77e-01 2.68e-01 4.64e-01 9.07e-01 1.21e+00   ph/cm2/s
              Error -------- 9.76e-02 -------- -------- 2.41e-01 3.54e-01   ph/cm2/s
 
Fluence        Band 5.79e-07 1.08e-06 1.21e-06 2.23e-06 3.60e-06 5.12e-06   erg/cm2
              Error 7.07e-08 -------- -------- -------- -------- --------   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    1.720    0.135    -      -           1.99e-03 1.59e-04   38.080 57
CPL   1.256    0.555      75.1  -27.2      3.51e-03 2.63e-03   35.800 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.998    0.521    -      -           7.80e-03 2.04e-03   51.310 57
CPL   1.016    0.611    9999.4    0.0      7.88e-03 6.49e-03   51.340 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: 179.200000 sec.
T50 in the 50-300 keV band: 99.200000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  202.432   -6.808  195.624
T90   182.048   -0.792  181.256
T50   101.376   52.920  154.296
Peak    1.000  148.124  149.124

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  238.1657 -50.8480 0.0223   26.1  -67.8       2.1584     8.6  TRIG_01152509       
------------------------------------------
 
Foreground time interval of the image:
 -6.808  71.301 (delta_t =  78.109 [sec])
Background time interval of the image:
-239.000  -6.808 (delta_t = 232.192 [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   -6.808 sec. to  195.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71991     ( -0.133658   0.135747 )
Norm@50keV  : 1.99236E-03    ( -0.00015996   0.00015858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.08 using 59 PHA bins.
# Reduced chi-squared =         0.6680 for     57 degrees of freedom 
# Null hypothesis probability =   9.746231e-01
 
Photon flux (15-150 keV)    in 202.4 sec: 0.266474 ( -0.0203177  0.0203517 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.72799e-06 ( -3.11111e-07  3.1421e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -6.808 sec. to  195.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25579     ( -0.598856   0.51163 )
Epeak [keV] : 75.1097      ( -20.7231 -75.1098 )
Norm@50keV  : 3.50913E-03    ( -0.00157783   0.00368193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.80 using 59 PHA bins.
# Reduced chi-squared =         0.6392 for     56 degrees of freedom 
# Null hypothesis probability =   9.837588e-01
 
Photon flux (15-150 keV)    in 202.4 sec: 0.260299 ( -0.021487  0.021467 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.57495e-06 ( -3.55597e-07  3.58086e-07 ) ergs/cm2
 
Band function
Time interval is from   -6.808 sec. to  195.624 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.946634   ( 1.02897   1.02897 )
beta        : -1.97752    ( 1.98338   0.325265 )
Epeak [keV] : 55.1107      ( -55.1163 -55.1163 )
Norm@50keV   : 5.54200E-03    ( -0.00555547   122.566 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.57 using 59 PHA bins.
# Reduced chi-squared =         0.6468 for     55 degrees of freedom 
# Null hypothesis probability =   9.805258e-01
 
Photon flux (15-150 keV)    in 202.4 sec: 0.260013 ( 6.73999  -0.021474 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.59744e-06 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.6312  (-1.15261  1.29223)
R^2/D10^2   : 5.27210E-02  (-0.0159349   0.0224777)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.13 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.875484e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.610e-07   4.868e-08
25- 50  1.205e-06   1.110e-07
50-150  1.195e-06   2.040e-07
15-150  2.761e-06   2.530e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 125.651       (-35.1642      54.5524)
Norm        : 1.11767       (-0.102716     0.130977)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.880e-07   6.254e-08
25- 50  1.060e-06   1.188e-07
50-150  1.935e-06   7.385e-07
15-150  3.583e-06   8.268e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.74590        (-1.68781      1.8444)
R1^2/D10^2  : 0.342510        (-0.185648      0.595405)
kT2 [keV]   : 22.8707        (-5.21276      11.0223)
R2^2/D10^2  : 4.44925E-03    (-0.00341031   0.0081399)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.725e-07   1.732e-07
25- 50  1.083e-06   2.957e-07
50-150  1.899e-06   9.571e-07
15-150  3.554e-06   1.186e-06

Peak spectrum fit

Power-law model
Time interval is from  148.124 sec. to  149.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.998407     ( -0.559035   0.482114 )
Norm@50keV  : 7.79962E-03    ( -0.0021078   0.00197222 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.31 using 59 PHA bins.
# Reduced chi-squared =         0.9002 for     57 degrees of freedom 
# Null hypothesis probability =   6.873579e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.898124 ( -0.238646  0.24096 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.43895e-08 ( -2.12013e-08  2.13107e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  148.124 sec. to  149.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01629     ( -0.758355   0.46411 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 7.87774E-03    ( -0.00188261   0.0110997 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.34 using 59 PHA bins.
# Reduced chi-squared =         0.9167 for     56 degrees of freedom 
# Null hypothesis probability =   6.517965e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.907441 ( -0.249481  0.232509 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.45647e-08 ( -2.12925e-08  2.04153e-08 ) ergs/cm2
 
Band function
Time interval is from  148.124 sec. to  149.124 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.850010   ( 0.850041   0.850041 )
beta        : -0.998341    ( 0.998298   0.559012 )
Epeak [keV] : 37.6893      ( -37.6147 -37.6147 )
Norm@50keV   : 1.27829E-02    ( -0.00687019   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.31 using 59 PHA bins.
# Reduced chi-squared =         0.9330 for     55 degrees of freedom 
# Null hypothesis probability =   6.162630e-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]    : 27.3711  (-10.4608  26.8796)
R^2/D10^2   : 1.54036E-02  (-0.0151011   0.0533313)
(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  1.907e-09   1.194e-09
25- 50  1.130e-08   6.960e-09
50-150  6.164e-08   3.604e-08
15-150  7.485e-08   4.509e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-79.7534      -200)
Norm        : 3.85757       (-0.968272     0.968272)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.606e-09   5.735e-09
25- 50  1.848e-08   1.061e-08
50-150  4.053e-08   2.461e-08
15-150  6.861e-08   4.035e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.65056        (-4.29416      6.72531)
R1^2/D10^2  : 0.342308        (-0.257671      1.06207)
kT2 [keV]   : 200.000        (-200      -200)
R2^2/D10^2  : 2.12540E-04    (-7.69549e-05   0.000509133)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.075e-09   4.457e-09
25- 50  1.669e-08   9.315e-09
50-150  6.209e-08   3.665e-08
15-150  8.585e-08   4.468e-08
Plot creation:
Sun Feb  5 12:20:20 EST 2023