batgrbproduct Analysis for Trigger=631946

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Feb 22 05:26:33 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger631946/GCN5_download_cron
======================================================================

  Trigger: 00631946      Segment: 000

  BAT Trigger Time: 446168344   [s; MET]
      Trigger Stop: 446169688   [s; MET]
               UTC: 2015-02-20T23:38:50.786320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 267.227007499147   Dec: -20.3786233408237  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.99
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.99

  Flight Position:   [ source = BAT ]
    RA: 267.227007499147   Dec: -20.3786233408237  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 267.152968070549   Dec: -20.3624703295515  [deg; J2000]  
        { 17h 48m 36.7s , -20d 21' 44.9" }
         +/- 4.26287129308745 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.62441950857341 [arcmin] (formal 1-sigma fit error)
    SNR: 3.8330437777879
 
  Angular difference between Flight and Ground position is 4.275833 arcmin
 
  Partial Coding Fraction: 0.953125    [ including projection effects ]

  Duration
     T90: 1344 +/- 
        Measured from: 0
                   to: 1344     [s; relative to TRIGTIME]
     T50: 1344 +/- 
        Measured from: 0
                   to: 1344     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1344 second)
        Measured from: 0     
                   to: 1344     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1344     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.642636   0.951956   0.465998   0.006458
           0.175408   0.160126   0.128910   0.104131 [error]
 Peak      1.642636   0.951956   0.465998   0.006458
           0.175408   0.160126   0.128910   0.104131 [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 4.56e-07 4.53e-07 3.16e-07 3.48e-07 1.36e-06 1.57e-06   erg/cm2
              Error 8.84e-08 7.78e-08 1.15e-07 2.44e-07 2.58e-07 4.00e-07   erg/cm2
Peak flux Power-law 1.85e-02 1.03e-02 3.57e-03 1.63e-03 3.32e-02 3.39e-02   ph/cm2/s
              Error 3.68e-03 1.69e-03 1.26e-03 1.06e-03 4.89e-03 5.01e-03   ph/cm2/s
 
Fluence   Cutoff-PL 4.57e-07 4.52e-07 3.15e-07 3.20e-07 1.36e-06 1.54e-06   erg/cm2
              Error 8.94e-08 8.52e-08 1.20e-07 3.23e-07 2.61e-07 4.43e-07   erg/cm2
Peak flux Cutoff-PL 1.85e-02 1.02e-02 3.51e-03 1.56e-03 3.32e-02 3.39e-02   ph/cm2/s
              Error -------- -------- -------- -------- -------- 4.99e-03   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    2.521    0.366    -      -           1.67e-04 4.39e-05   66.030 57
CPL   1.971    0.000       2.1    0.0      3.50e-04 0.00e+00   66.790 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.521    0.366    -      -           1.67e-04 4.39e-05   66.030 57
CPL   1.971    0.000       2.1    0.0      3.50e-04 0.00e+00   66.790 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 1344.000    0.000 1344.000
T90  1344.000    0.000 1344.000
T50  1344.000    0.000 1344.000
Peak 1344.000    0.000 1344.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  267.1530 -20.3625 0.0502   14.6   30.0       2.2703     3.8  TRIG_00631946       
------------------------------------------
 
Foreground time interval of the image:
150.000 963.096 (delta_t = 813.095 [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  150.000 sec. to  963.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.52070     ( -0.338519   0.394288 )
Norm@50keV  : 1.66785E-04    ( -4.4538e-05   4.32097e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.159 for     57 degrees of freedom 
# Null hypothesis probability =   1.929975e-01
 
Photon flux (15-150 keV)    in 813.1 sec: 3.31841E-02 ( -0.00488683  0.0048871 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36376e-06 ( -2.51837e-07  2.63857e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  150.000 sec. to  963.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97088     (     )
Epeak [keV] : 2.13842      (   )
Norm@50keV  : 3.50077E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.79 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     56 degrees of freedom 
# Null hypothesis probability =   1.531972e-01
 
Photon flux (15-150 keV)    in 813.1 sec: 3.31854E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36298e-06 ( -2.63574e-07  2.5881e-07 ) ergs/cm2
 
Band function
Time interval is from  150.000 sec. to  963.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.59510   ( 7.55535   2.5951 )
beta        : -2.52071    ( -0.394232   0.338479 )
Epeak [keV] : 63.5166      ( -63.5166 -63.5166 )
Norm@50keV   : 2.26683E-02    ( -0.00605322   0.005873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     55 degrees of freedom 
# Null hypothesis probability =   1.464887e-01
 
Photon flux (15-150 keV)    in 813.1 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]    : 7.59839  (-1.51103  1.75667)
R^2/D10^2   : 4.20569E-02  (-0.0238052   0.06376)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.36 using 59 PHA bins.
# Reduced chi-squared =          1.410 for     57 degrees of freedom 
# Null hypothesis probability =   2.245703e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.427e-07   9.542e-08
25- 50  5.474e-07   1.483e-07
50-150  1.210e-07   6.247e-08
15-150  1.011e-06   2.493e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 33.8888       (-11.2262      18.8323)
Norm        : 0.236382       (-0.068146     0.110135)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.47 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     57 degrees of freedom 
# Null hypothesis probability =   1.420695e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.142e-07   7.972e-08
25- 50  5.046e-07   1.050e-07
50-150  3.224e-07   1.605e-07
15-150  1.241e-06   2.960e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.55715        (-1.20968      1.68423)
R1^2/D10^2  : 5.78666        (-5.68722      1259.06)
kT2 [keV]   : 11.4221        (-2.84201      4.86618)
R2^2/D10^2  : 6.63946E-03    (-0.00531198   0.0219863)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.32 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     55 degrees of freedom 
# Null hypothesis probability =   1.826673e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.518e-07   2.256e-07
25- 50  4.637e-07   2.471e-07
50-150  3.329e-07   2.097e-07
15-150  1.248e-06   6.497e-07

Peak spectrum fit

Power-law model
Time interval is from  150.000 sec. to  963.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.52070     ( -0.338519   0.394288 )
Norm@50keV  : 1.66785E-04    ( -4.4538e-05   4.32097e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.159 for     57 degrees of freedom 
# Null hypothesis probability =   1.929975e-01
 
Photon flux (15-150 keV)    in 813.1 sec: 3.31841E-02 ( -0.00488683  0.0048871 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36376e-06 ( -2.51837e-07  2.63857e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  150.000 sec. to  963.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97088     (     )
Epeak [keV] : 2.13842      (   )
Norm@50keV  : 3.50077E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.79 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     56 degrees of freedom 
# Null hypothesis probability =   1.531972e-01
 
Photon flux (15-150 keV)    in 813.1 sec: 3.31854E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36298e-06 ( -2.63574e-07  2.5881e-07 ) ergs/cm2
 
Band function
Time interval is from  150.000 sec. to  963.096 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.59510   ( 7.55535   2.5951 )
beta        : -2.52071    ( -0.394232   0.338479 )
Epeak [keV] : 63.5166      ( -63.5166 -63.5166 )
Norm@50keV   : 2.26683E-02    ( -0.00605322   0.005873 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     55 degrees of freedom 
# Null hypothesis probability =   1.464887e-01
 
Photon flux (15-150 keV)    in 813.1 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]    : 7.59839  (-1.51103  1.75667)
R^2/D10^2   : 4.20569E-02  (-0.0238052   0.06376)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.36 using 59 PHA bins.
# Reduced chi-squared =          1.410 for     57 degrees of freedom 
# Null hypothesis probability =   2.245703e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.427e-07   9.005e-08
25- 50  5.474e-07   1.598e-07
50-150  1.210e-07   5.914e-08
15-150  1.011e-06   2.395e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 33.8888       (-11.2262      18.8323)
Norm        : 0.236382       (-0.068146     0.110135)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.47 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     57 degrees of freedom 
# Null hypothesis probability =   1.420695e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.142e-07   8.342e-08
25- 50  5.046e-07   1.103e-07
50-150  3.224e-07   1.673e-07
15-150  1.241e-06   2.870e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.55715        (-1.20968      1.68423)
R1^2/D10^2  : 5.78666        (-5.68722      1259.06)
kT2 [keV]   : 11.4221        (-2.84201      4.86618)
R2^2/D10^2  : 6.63946E-03    (-0.00531198   0.0219863)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.32 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     55 degrees of freedom 
# Null hypothesis probability =   1.826673e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.518e-07   2.367e-07
25- 50  4.637e-07   2.521e-07
50-150  3.329e-07   2.086e-07
15-150  1.248e-06   5.416e-07
Plot creation:
Sun Feb 22 05:29:44 EST 2015