batgrbproduct Analysis for Trigger=690638

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Jun 12 16:54:14 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger690638/GCN5_download_cron
======================================================================

  Trigger: 00690638      Segment: 000

  BAT Trigger Time: 487391088   [s; MET]
      Trigger Stop: 487391376   [s; MET]
               UTC: 2016-06-12T02:24:31.596600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.011997682738   Dec: -15.4328545811362  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.6
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.6

  Flight Position:   [ source = BAT ]
    RA: 245.011997682738   Dec: -15.4328545811362  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 244.992350781637   Dec: -15.5645611551884  [deg; J2000]  
        { 16h 19m 58.2s , -15d 33' 52.4" }
         +/- 1.02596334823056 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.297414459324074 [arcmin] (formal 1-sigma fit error)
    SNR: 29.3234957379677
 
  Angular difference between Flight and Ground position is 7.983622 arcmin
 
  Partial Coding Fraction: 0.6328125    [ including projection effects ]

  Duration
     T90: 493.735999941826 +/- 53.661705995437
        Measured from: -127.931999862194
                   to: 365.804000079632     [s; relative to TRIGTIME]
     T50: 229.05999994278 +/- 40.0120278786996
        Measured from: -19.5839998722076
                   to: 209.476000070572     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 71.2799999713898     
                   to: 72.2799999713898     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -179.791999995708     
                   to: 401.315999984741     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    11.683433   0.840889  -0.000752  -0.222718
           0.181339   0.162302   0.134445   0.114041 [error]
 Peak      0.038894   0.020173   0.016241  -0.000802
           0.007835   0.007241   0.005769   0.004724 [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 3.74e-06 4.63e-07 2.48e-08 1.40e-09 4.23e-06 4.23e-06   erg/cm2
              Error 3.42e-07 7.35e-08 9.91e-09 9.60e-10 3.42e-07 3.42e-07   erg/cm2
Peak flux Power-law 3.54e-01 2.04e-01 7.42e-02 3.56e-02 6.52e-01 6.68e-01   ph/cm2/s
              Error 1.34e-01 6.69e-02 6.35e-02 5.06e-02 1.76e-01 1.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.73e-06 3.03e-07 1.75e-10 1.56e-17 4.03e-06 4.03e-06   erg/cm2
              Error 3.79e-07 9.17e-08 1.39e-09 2.31e-13 3.85e-07 3.85e-07   erg/cm2
Peak flux Cutoff-PL 3.56e-01 2.03e-01 7.33e-02 3.46e-02 6.51e-01 6.67e-01   ph/cm2/s
              Error -------- -------- -------- -------- 1.76e-01 --------   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 2.02e-01 2.92e-03 9.21e-06 2.90e-08 2.04e-01 2.04e-01   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    6.222    0.354    -      -           4.76e-05 1.55e-05   64.050 57
CPL   1.000    0.000      50.0    0.0      9.70e-04 0.00e+00  436.700 56
 
The chi2 of BB fit is 54.29 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    2.457    0.809    -      -           3.40e-03 1.77e-03   49.440 57
CPL   1.958    0.000       5.7    0.0      5.66e-03 0.00e+00   50.280 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  581.108 -179.792  401.316
T90   493.736 -127.932  365.804
T50   229.060  -19.584  209.476
Peak    1.000   71.280   72.280

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  244.9924 -15.5646 0.0065   20.5   89.6      12.5606    29.3  TRIG_00690638       
------------------------------------------
 
Foreground time interval of the image:
-79.699 302.601 (delta_t = 382.300 [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 -179.792 sec. to  401.316 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.22197     ( -0.351767   0.356597 )
Norm@50keV  : 4.75978E-05    ( -1.34902e-05   1.76011e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.05 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.429610e-01
 
Photon flux (15-150 keV)    in 581.1 sec: 0.245017 ( -0.0213648  0.0214938 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.23144e-06 ( -3.40798e-07  3.42388e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -179.792 sec. to  401.316 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 9.70468E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         436.70 using 59 PHA bins.
# Reduced chi-squared =         7.7982 for     56 degrees of freedom 
# Null hypothesis probability =   2.232854e-60
 
Photon flux (15-150 keV)    in 581.1 sec: 0.235708 ( -0.024796  0.024072 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.03236e-06 ( -3.90569e-07  3.79946e-07 ) ergs/cm2
 
Band function
Time interval is from -179.792 sec. to  401.316 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -7.86345   ( 3.65322   7.86345 )
beta        : -6.26358    ( -0.326181   0.386209 )
Epeak [keV] : 275.272      ( -275.272 -275.272 )
Norm@50keV   : 6.21857E-03    ( -0.00168769   0.00255122 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.09 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     55 degrees of freedom 
# Null hypothesis probability =   1.878360e-01
 
Photon flux (15-150 keV)    in 581.1 sec: 0.204443 (    ) 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]    : 2.54474  (-0.152997  0.169497)
R^2/D10^2   : 102.654  (-42.084   70.2767)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9524 for     57 degrees of freedom 
# Null hypothesis probability =   5.774063e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.719e-06   5.698e-07
25- 50  2.935e-07   5.561e-08
50-150  1.102e-10   7.179e-11
15-150  4.012e-06   6.715e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.36730       (-0.380864      0.445539)
Norm        : 93.3171       (-33.4895     51.8668)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.12 using 59 PHA bins.
# Reduced chi-squared =         0.9670 for     57 degrees of freedom 
# Null hypothesis probability =   5.459007e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.769e-06   5.146e-07
25- 50  3.450e-07   6.889e-08
50-150  8.625e-10   5.403e-10
15-150  4.115e-06   5.776e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.52580        (      )
R1^2/D10^2  : 8.55068        (      )
kT2 [keV]   : 2.97954        (      )
R2^2/D10^2  : 7.97335E-05    (   )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         110.56 using 59 PHA bins.
# Reduced chi-squared =         2.0102 for     55 degrees of freedom 
# Null hypothesis probability =   1.324287e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.369e-06   2.828e-02
25- 50  5.875e-07   2.470e-01
50-150  3.166e-09   6.099e+00
15-150  2.960e-06   6.186e+00

Peak spectrum fit

Power-law model
Time interval is from   71.280 sec. to   72.280 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.45721     ( -0.638646   0.980157 )
Norm@50keV  : 3.40400E-03    ( -0.00191156   0.00163539 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.44 using 59 PHA bins.
# Reduced chi-squared =         0.8673 for     57 degrees of freedom 
# Null hypothesis probability =   7.515079e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.651560 ( -0.17636  0.176354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36532e-08 ( -1.23196e-08  1.29128e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   71.280 sec. to   72.280 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.95772     (     )
Epeak [keV] : 5.74741      (   )
Norm@50keV  : 5.65817E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.28 using 59 PHA bins.
# Reduced chi-squared =         0.8978 for     56 degrees of freedom 
# Null hypothesis probability =   6.902985e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.651157 ( -0.176231  0.176224 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.322e-08 ( -1.18173e-08  1.33709e-08 ) ergs/cm2
 
Band function
Time interval is from   71.280 sec. to   72.280 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.81088   ( 1.81   1.81 )
beta        : -2.45703    ( 2.45758   0.638058 )
Epeak [keV] : 3.43806      ( -3.37947 -3.37947 )
Norm@50keV   : 1.65609E-02    ( -0.0169186   0.14418 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.44 using 59 PHA bins.
# Reduced chi-squared =         0.8988 for     55 degrees of freedom 
# Null hypothesis probability =   6.862917e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.204443 (    ) 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]    : 8.59799  (-5.7767  6.70006)
R^2/D10^2   : 0.478332  (-0.477741   368.971)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.76 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     57 degrees of freedom 
# Null hypothesis probability =   4.107484e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.102e-08   6.655e-09
25- 50  7.439e-09   4.803e-09
50-150  3.227e-10   3.052e-10
15-150  1.878e-08   1.109e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 44.5717       (-28.2602      99.4025)
Norm        : 3.80220       (-1.65178     5.52955)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.78 using 59 PHA bins.
# Reduced chi-squared =         0.9085 for     57 degrees of freedom 
# Null hypothesis probability =   6.705334e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.028e-09   4.058e-09
25- 50  1.242e-08   7.081e-09
50-150  1.077e-08   7.862e-09
15-150  3.222e-08   1.792e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.25097        (-1.02613      1.60143)
R1^2/D10^2  : 357.589        (-346.297      88317.5)
kT2 [keV]   : 15.5507        (-5.84371      12.5184)
R2^2/D10^2  : 4.13753E-02    (-0.0358198   0.112395)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.54 using 59 PHA bins.
# Reduced chi-squared =         0.8279 for     55 degrees of freedom 
# Null hypothesis probability =   8.147443e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.092e-08   6.005e-09
25- 50  8.960e-09   5.320e-09
50-150  1.428e-08   9.725e-09
15-150  3.415e-08   1.843e-08
Plot creation:
Sun Jun 12 17:00:11 EDT 2016