batgrbproduct Analysis for Trigger=661253

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Oct 24 13:00:20 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger661253/GCN5_download_cron
======================================================================

  Trigger: 00661253      Segment: 000

  BAT Trigger Time: 467300600.128   [s; MET]
      Trigger Stop: 467300601.152   [s; MET]
               UTC: 2015-10-23T13:43:04.815600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 271.019585617029   Dec: -8.3228306705058  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.49
     Image Trigger?:     NO
     Rate S/N Ratio:     16.7332005306815  [ if not an image trigger ]
     Image S/N Ratio:    8.49

  Flight Position:   [ source = BAT ]
    RA: 271.019585617029   Dec: -8.3228306705058  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 271.012278705235   Dec: -8.28879895048902  [deg; J2000]  
        { 18h 04m 02.9s , -08d 17' 19.7" }
         +/- 1.81493199384027 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.852435058241283 [arcmin] (formal 1-sigma fit error)
    SNR: 12.9812905558254
 
  Angular difference between Flight and Ground position is 2.087478 arcmin
 
  Partial Coding Fraction: 0.8359375    [ including projection effects ]

  Duration
     T90: 10.6559999585152 +/- 4.40692729039692
        Measured from: -0.404000043869019
                   to: 10.2519999146461     [s; relative to TRIGTIME]
     T50: 3.19999998807907 +/- 1.20122601752342
        Measured from: 0.535999953746796
                   to: 3.73599994182587     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0279999971389771     
                   to: 0.972000002861023     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.65200001001358     
                   to: 12.1639999747276     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.209851   0.226157   0.080771   0.010075
           0.023597   0.021359   0.017582   0.015086 [error]
 Peak      0.052157   0.048389   0.024813   0.004966
           0.007118   0.006528   0.005317   0.004284 [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 6.97e-08 8.20e-08 6.95e-08 9.99e-08 2.57e-07 3.21e-07   erg/cm2
              Error 1.11e-08 9.98e-09 1.59e-08 4.43e-08 3.64e-08 6.39e-08   erg/cm2
Peak flux Power-law 4.88e-01 3.59e-01 1.75e-01 1.21e-01 1.08e+00 1.14e+00   ph/cm2/s
              Error 1.05e-01 5.23e-02 4.41e-02 5.91e-02 1.58e-01 1.67e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.54e-08 9.06e-08 6.21e-08 2.09e-08 2.34e-07 2.39e-07   erg/cm2
              Error 1.24e-08 1.40e-08 2.03e-08 5.78e-08 4.10e-08 7.52e-08   erg/cm2
Peak flux Cutoff-PL 4.88e-01 3.59e-01 1.75e-01 1.21e-01 1.08e+00 1.14e+00   ph/cm2/s
              Error 1.10e-01 6.10e-02 4.52e-02 9.41e-02 1.61e-01 1.88e-01   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    2.238    0.239    -      -           2.12e-03 3.52e-04   52.960 57
CPL   1.288    1.044      28.8   19.5      7.94e-03 2.78e-02   50.670 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.035    0.290    -      -           7.08e-03 1.33e-03   47.940 57
CPL   1.997    0.606       4.6   -0.2      7.38e-03 2.40e-03   47.940 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: 2.560000 sec.
T50 in the 50-300 keV band: 1.152000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.816   -0.652   12.164
T90    10.656   -0.404   10.252
T50     3.200    0.536    3.736
Peak    1.000   -0.028    0.972

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  271.0123  -8.2888 0.0147   18.0  133.0       0.5547    13.0  TRIG_00661253       
------------------------------------------
 
Foreground time interval of the image:
 -0.652  12.164 (delta_t =  12.816 [sec])
Background time interval of the image:
-240.128  -0.652 (delta_t = 239.476 [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   -0.652 sec. to   12.164 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.23787     ( -0.229941   0.247668 )
Norm@50keV  : 2.11836E-03    ( -0.000355537   0.000347876 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.96 using 59 PHA bins.
# Reduced chi-squared =         0.9291 for     57 degrees of freedom 
# Null hypothesis probability =   6.274059e-01
 
Photon flux (15-150 keV)    in 12.82 sec: 0.357834 ( -0.0419701  0.0419832 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.56782e-07 ( -3.59106e-08  3.69813e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.652 sec. to   12.164 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28830     ( -1.37058   0.716535 )
Epeak [keV] : 28.7727      ( -27.444 11.6329 )
Norm@50keV  : 7.94496E-03    ( -0.007945   0.0476813 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.67 using 59 PHA bins.
# Reduced chi-squared =         0.9049 for     56 degrees of freedom 
# Null hypothesis probability =   6.760564e-01
 
Photon flux (15-150 keV)    in 12.82 sec: 0.345194 ( -0.043711  0.04407 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33569e-07 ( -3.8069e-08  4.38521e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.652 sec. to   12.164 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.36201   ( 1.36192   1.36192 )
beta        : -4.45752    ( 3.50575   13.4871 )
Epeak [keV] : 28.9979      ( -28.3189 11.787 )
Norm@50keV   : 6.98194E-03    ( -0.00331536   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.71 using 59 PHA bins.
# Reduced chi-squared =         0.9221 for     55 degrees of freedom 
# Null hypothesis probability =   6.390167e-01
 
Photon flux (15-150 keV)    in 12.82 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]    : 8.60812  (-1.07396  1.2366)
R^2/D10^2   : 0.291064  (-0.121451   0.207231)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.74 using 59 PHA bins.
# Reduced chi-squared =          1.048 for     57 degrees of freedom 
# Null hypothesis probability =   3.763865e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.251e-08   1.085e-08
25- 50  1.040e-07   1.697e-08
50-150  3.455e-08   1.179e-08
15-150  1.910e-07   3.384e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 44.6559       (-11.7721      18.8136)
Norm        : 2.15434       (-0.427177     0.575483)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.68 using 59 PHA bins.
# Reduced chi-squared =         0.8891 for     57 degrees of freedom 
# Null hypothesis probability =   7.095624e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.561e-08   1.022e-08
25- 50  9.033e-08   1.341e-08
50-150  7.850e-08   2.758e-08
15-150  2.344e-07   3.622e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.06131        (-3.61592      2.49305)
R1^2/D10^2  : 1.51511        (-1.07195      2339.46)
kT2 [keV]   : 13.8938        (-4.96783      16.164)
R2^2/D10^2  : 2.91756E-02    (-0.0269474   0.190687)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.26 using 59 PHA bins.
# Reduced chi-squared =         0.9320 for     55 degrees of freedom 
# Null hypothesis probability =   6.183387e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.485e-08   3.461e-08
25- 50  8.970e-08   4.565e-08
50-150  7.276e-08   4.443e-08
15-150  2.273e-07   1.180e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.028 sec. to    0.972 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03475     ( -0.278935   0.301354 )
Norm@50keV  : 7.08418E-03    ( -0.00135974   0.00130908 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.94 using 59 PHA bins.
# Reduced chi-squared =         0.8410 for     57 degrees of freedom 
# Null hypothesis probability =   7.981695e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07997 ( -0.158056  0.158168 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.54664e-08 ( -1.13666e-08  1.16913e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.028 sec. to    0.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99692     ( -1.19252   0.0200865 )
Epeak [keV] : 4.59022      ( -3.81809 -4.17628 )
Norm@50keV  : 7.37725E-03    ( -0.00236115   0.00244071 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.94 using 59 PHA bins.
# Reduced chi-squared =         0.8561 for     56 degrees of freedom 
# Null hypothesis probability =   7.695914e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07959 ( -0.163869  0.15804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.54579e-08 ( -1.34812e-08  1.15691e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.028 sec. to    0.972 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.86439   ( 1.6061   1.6061 )
beta        : -2.06646    ( 2.11311   0.35438 )
Epeak [keV] : 19.3692      ( -28.0243 -28.0243 )
Norm@50keV   : 14.0168    ( -14.0362   3089.65 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.84 using 59 PHA bins.
# Reduced chi-squared =         0.8698 for     55 degrees of freedom 
# Null hypothesis probability =   7.423315e-01
 
Photon flux (15-150 keV)    in 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]    : 9.29616  (-1.59331  1.97557)
R^2/D10^2   : 0.643779  (-0.339592   0.703765)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.34 using 59 PHA bins.
# Reduced chi-squared =          1.059 for     57 degrees of freedom 
# Null hypothesis probability =   3.561012e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.100e-08   3.244e-09
25- 50  2.459e-08   5.735e-09
50-150  1.035e-08   4.134e-09
15-150  4.594e-08   1.066e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 63.9625       (-23.9049      51.3053)
Norm        : 5.45147       (-1.25272     1.71406)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.01 using 59 PHA bins.
# Reduced chi-squared =         0.8598 for     57 degrees of freedom 
# Null hypothesis probability =   7.652686e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.383e-08   2.880e-09
25- 50  2.146e-08   3.775e-09
50-150  2.572e-08   1.159e-08
15-150  6.101e-08   1.477e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.86737        (-2.49251      2.51182)
R1^2/D10^2  : 3.00343        (-2.12893      24.1115)
kT2 [keV]   : 22.9273        (-10.5089      69.3216)
R2^2/D10^2  : 1.43128E-02    (-0.0135754   0.148607)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.81 using 59 PHA bins.
# Reduced chi-squared =         0.8875 for     55 degrees of freedom 
# Null hypothesis probability =   7.087124e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.466e-08   8.142e-09
25- 50  2.002e-08   1.045e-08
50-150  3.010e-08   1.731e-08
15-150  6.477e-08   3.405e-08
Plot creation:
Sat Oct 24 13:06:02 EDT 2015