batgrbproduct analysis for trigger=813771

batgrbproduct Analysis for Trigger=813771

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Mar 13 02:08:40 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger813771/GCN5_download_cron
======================================================================

  Trigger: 00813771      Segment: 000

  BAT Trigger Time: 542506320   [s; MET]
      Trigger Stop: 542507344   [s; MET]
               UTC: 2018-03-12T00:11:39.390720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 275.024883513983   Dec: 7.19247773930541  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.92
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.92

  Flight Position:   [ source = BAT ]
    RA: 275.024883513983   Dec: 7.19247773930541  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 275.012188780557   Dec: 7.229870227216  [deg; J2000]  
        { 18h 20m 02.9s , +07d 13' 47.5" }
         +/- 3.52931800329577 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.62446790247778 [arcmin] (formal 1-sigma fit error)
    SNR: 5.0199912892981
 
  Angular difference between Flight and Ground position is 2.367390 arcmin
 
  Partial Coding Fraction: 0.6328125    [ including projection effects ]

  Duration
     T90: 1024 +/- 
        Measured from: 0
                   to: 1024     [s; relative to TRIGTIME]
     T50: 1024 +/- 
        Measured from: 0
                   to: 1024     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1024 second)
        Measured from: 0     
                   to: 1024     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1024     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.181651   2.369226   1.932623   0.423477
           0.329055   0.282816   0.231091   0.194645 [error]
 Peak      1.181651   2.369226   1.932623   0.423477
           0.329055   0.282816   0.231091   0.194645 [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 -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Cutoff-PL -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   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    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.517    1.075      85.1  -30.5      1.18e-03 1.94e-03   58.430 56
 
The chi2 of BB fit is 64.88 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    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.517    1.075      85.1  -30.5      1.18e-03 1.94e-03   58.430 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 1024.000    0.000 1024.000
T90  1024.000    0.000 1024.000
T50  1024.000    0.000 1024.000
Peak 1024.000    0.000 1024.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  275.0122  +7.2299 0.0384   37.2 -171.1       6.6945     5.0  TRIG_00813771       
------------------------------------------
 
Foreground time interval of the image:
  0.000 963.003 (delta_t = 963.003 [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  963.003 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index:      (     )
Norm@50keV  :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 963 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  963.003 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.517192     ( -1.20938   0.941205 )
Epeak [keV] : 85.1433      ( -24.1833 -85.1424 )
Norm@50keV  : 1.17559E-03    ( -0.000749768   0.00313961 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.43 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     56 degrees of freedom 
# Null hypothesis probability =   3.860434e-01
 
Photon flux (15-150 keV)    in 963 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  963.003 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 963 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]    : 16.3188  (-2.41863  2.97589)
R^2/D10^2   : 4.54310E-03  (-0.00204596   0.00354099)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.88 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     57 degrees of freedom 
# Null hypothesis probability =   2.211276e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.398e-07   6.731e-08
25- 50  1.026e-06   2.408e-07
50-150  1.924e-06   4.492e-07
15-150  3.190e-06   5.903e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-68.7688      -200)
Norm        : 0.220534       (-0.0290672     0.0290672)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.55 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.490700e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.291e-07   3.005e-07
25- 50  1.018e-06   5.590e-07
50-150  2.232e-06   1.239e-06
15-150  3.779e-06   2.077e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.21372        (-3.90372      5.11435)
R1^2/D10^2  : 2.07518E-02        (-0.0146196      0.0885093)
kT2 [keV]   : 29.1703        (-23.8836      -29.1983)
R2^2/D10^2  : 4.23737E-04    (-0.000419227   0.0013322)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.33 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     55 degrees of freedom 
# Null hypothesis probability =   3.888588e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.894e-07   2.282e-07
25- 50  1.073e-06   5.764e-07
50-150  2.348e-06   1.274e-06
15-150  3.811e-06   1.921e-06

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to  963.003 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index:      (     )
Norm@50keV  :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 963 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to  963.003 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.517192     ( -1.20938   0.941205 )
Epeak [keV] : 85.1433      ( -24.1833 -85.1424 )
Norm@50keV  : 1.17559E-03    ( -0.000749768   0.00313961 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.43 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     56 degrees of freedom 
# Null hypothesis probability =   3.860434e-01
 
Photon flux (15-150 keV)    in 963 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to  963.003 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 963 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]    : 16.3188  (-2.41863  2.97589)
R^2/D10^2   : 4.54310E-03  (-0.00204596   0.00354099)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.88 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     57 degrees of freedom 
# Null hypothesis probability =   2.211276e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.398e-07   6.365e-08
25- 50  1.026e-06   2.089e-07
50-150  1.924e-06   4.772e-07
15-150  3.190e-06   6.659e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-68.7688      -200)
Norm        : 0.220534       (-0.0290672     0.0290672)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.55 using 59 PHA bins.
# Reduced chi-squared =          1.062 for     57 degrees of freedom 
# Null hypothesis probability =   3.490700e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.291e-07   2.971e-07
25- 50  1.018e-06   5.643e-07
50-150  2.232e-06   1.261e-06
15-150  3.779e-06   2.068e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.21372        (-3.90372      5.11435)
R1^2/D10^2  : 2.07518E-02        (-0.0146196      0.0885093)
kT2 [keV]   : 29.1703        (-23.8836      -29.1983)
R2^2/D10^2  : 4.23737E-04    (-0.000418887   0.00227417)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.33 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     55 degrees of freedom 
# Null hypothesis probability =   3.888588e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.894e-07   2.226e-07
25- 50  1.073e-06   5.778e-07
50-150  2.348e-06   1.278e-06
15-150  3.811e-06   1.890e-06
Plot creation:
Tue Mar 13 02:12:41 EDT 2018