batgrbproduct Analysis for Trigger=656604

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Sep 26 04:24:53 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger656604/GCN5_download_cron
======================================================================

  Trigger: 00656604      Segment: 000

  BAT Trigger Time: 464846984   [s; MET]
      Trigger Stop: 464847048   [s; MET]
               UTC: 2015-09-25T04:09:28.817940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 227.519805836203   Dec: -19.6283015106395  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.64
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.64

  Flight Position:   [ source = BAT ]
    RA: 227.519805836203   Dec: -19.6283015106395  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 227.537514363029   Dec: -19.6395203151358  [deg; J2000]  
        { 15h 10m 09.0s , -19d 38' 22.3" }
         +/- 1.98891730865041 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.830642460709249 [arcmin] (formal 1-sigma fit error)
    SNR: 11.3899824616361
 
  Angular difference between Flight and Ground position is 1.206057 arcmin
 
  Partial Coding Fraction: 0.5625    [ including projection effects ]

  Duration
     T90: 121.447999954224 +/- 27.0322042872599
        Measured from: 10.3480001091957
                   to: 131.796000063419     [s; relative to TRIGTIME]
     T50: 41.0959998965263 +/- 26.6313271336868
        Measured from: 23.3960001468658
                   to: 64.4920000433922     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 30.6840000152588     
                   to: 31.6840000152588     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 3.50800001621246     
                   to: 149.611999988556     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.060082   1.020993   0.469134   0.060048
           0.097157   0.091596   0.075331   0.062965 [error]
 Peak      0.023001   0.025290   0.021529   0.007658
           0.009151   0.008667   0.007112   0.006052 [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 3.65e-07 4.40e-07 3.85e-07 5.77e-07 1.39e-06 1.77e-06   erg/cm2
              Error 5.27e-08 4.61e-08 7.27e-08 2.13e-07 1.68e-07 2.99e-07   erg/cm2
Peak flux Power-law 2.08e-01 2.08e-01 1.46e-01 1.62e-01 6.25e-01 7.23e-01   ph/cm2/s
              Error 1.26e-01 7.81e-02 5.99e-02 1.44e-01 2.20e-01 2.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.50e-07 4.68e-07 3.72e-07 2.36e-07 1.33e-06 1.43e-06   erg/cm2
              Error 5.79e-08 6.19e-08 8.41e-08 3.98e-07 1.91e-07 4.18e-07   erg/cm2
Peak flux Cutoff-PL 1.92e-01 2.12e-01 1.51e-01 1.16e-01 6.14e-01 6.72e-01   ph/cm2/s
              Error 1.71e-01 8.54e-02 7.19e-02 1.27e-01 2.42e-01 2.98e-01   ph/cm2/s
 
Fluence        Band 3.46e-07 4.69e-07 3.62e-07 3.80e-07 1.34e-06 1.56e-06   erg/cm2
              Error -------- -------- 8.70e-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    2.194    0.203    -      -           1.01e-03 1.39e-04   69.670 57
CPL   1.682    0.634      25.2    0.0      2.03e-03 0.00e+00   68.440 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.511    0.629    -      -           4.99e-03 1.68e-03   53.550 57
CPL   1.169    3.513     131.6    0.0      7.24e-03 8.01e-01   53.500 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: 27.968000 sec.
T50 in the 50-300 keV band: 11.776000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  146.104    3.508  149.612
T90   121.448   10.348  131.796
T50    41.096   23.396   64.492
Peak    1.000   30.684   31.684

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  227.5375 -19.6395 0.0169   35.5  -37.9       1.9887    11.4  TRIG_00656604       
------------------------------------------
 
Foreground time interval of the image:
  3.508  72.001 (delta_t =  68.493 [sec])
Background time interval of the image:
-75.299   3.508 (delta_t =  78.807 [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    3.508 sec. to  149.612 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.19370     ( -0.196478   0.208873 )
Norm@50keV  : 1.01473E-03    ( -0.000140737   0.000137501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.67 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     57 degrees of freedom 
# Null hypothesis probability =   1.209357e-01
 
Photon flux (15-150 keV)    in 146.1 sec: 0.167438 ( -0.0174029  0.0174164 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39266e-06 ( -1.66199e-07  1.69231e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.508 sec. to  149.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68217     ( -0.950971   0.317375 )
Epeak [keV] : 25.1912      (   )
Norm@50keV  : 2.02734E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.44 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     56 degrees of freedom 
# Null hypothesis probability =   1.229919e-01
 
Photon flux (15-150 keV)    in 146.1 sec: 0.164171 ( -0.017795  0.018075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3263e-06 ( -1.86933e-07  1.95756e-07 ) ergs/cm2
 
Band function
Time interval is from    3.508 sec. to  149.612 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.113783   ( -0.0979464   -0.0979464 )
beta        : -2.37636    ( 2.37591   0.31169 )
Epeak [keV] : 25.2068      ( -25.2254 16.3478 )
Norm@50keV   : 4.46922E-02    ( -0.0404917   186.29 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.05 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     55 degrees of freedom 
# Null hypothesis probability =   1.112659e-01
 
Photon flux (15-150 keV)    in 146.1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33563e-06 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.94418  (-1.09495  1.24024)
R^2/D10^2   : 0.115566  (-0.0466896   0.0796256)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.84 using 59 PHA bins.
# Reduced chi-squared =          1.541 for     57 degrees of freedom 
# Null hypothesis probability =   5.416739e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.621e-07   4.785e-08
25- 50  5.517e-07   7.670e-08
50-150  2.065e-07   6.395e-08
15-150  1.020e-06   1.407e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 49.7668       (-12.2413      18.7973)
Norm        : 0.944832       (-0.164495     0.215064)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.87 using 59 PHA bins.
# Reduced chi-squared =          1.208 for     57 degrees of freedom 
# Null hypothesis probability =   1.346585e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.372e-07   4.756e-08
25- 50  4.834e-07   6.100e-08
50-150  4.673e-07   1.354e-07
15-150  1.288e-06   1.728e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.17646        (-1.3889      1.62653)
R1^2/D10^2  : 0.733502        (-0.234689      1.86292)
kT2 [keV]   : 16.7130        (-4.42486      9.59886)
R2^2/D10^2  : 6.65584E-03    (-0.00562067   0.0189061)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.04 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     55 degrees of freedom 
# Null hypothesis probability =   1.113590e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.544e-07   1.734e-07
25- 50  4.549e-07   2.016e-07
50-150  4.912e-07   2.821e-07
15-150  1.300e-06   6.003e-07

Peak spectrum fit

Power-law model
Time interval is from   30.684 sec. to   31.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51072     ( -0.623227   0.634099 )
Norm@50keV  : 4.99374E-03    ( -0.00169375   0.00167367 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.55 using 59 PHA bins.
# Reduced chi-squared =         0.9395 for     57 degrees of freedom 
# Null hypothesis probability =   6.051669e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.625227 ( -0.218287  0.220888 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72913e-08 ( -1.68873e-08  1.71931e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   30.684 sec. to   31.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16878     ( -5.72174   1.30364 )
Epeak [keV] : 131.637      ( -131.628 -131.628 )
Norm@50keV  : 7.23882E-03    ( -0.00397821   1.59761 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.50 using 59 PHA bins.
# Reduced chi-squared =         0.9554 for     56 degrees of freedom 
# Null hypothesis probability =   5.699215e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.613793 ( -0.254618  0.228555 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.64974e-08 ( -9.1778e-09  1.782e-08 ) ergs/cm2
 
Band function
Time interval is from   30.684 sec. to   31.684 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.913081   ( 0.913432   0.913432 )
beta        : -2.03443    ( 1.9843   9.7809 )
Epeak [keV] : 97.1816      ( -101.18 -101.18 )
Norm@50keV   : 9.55974E-03    ( -0.00526428   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.51 using 59 PHA bins.
# Reduced chi-squared =         0.9730 for     55 degrees of freedom 
# Null hypothesis probability =   5.315530e-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]    : 16.8201  (-5.15694  8.85441)
R^2/D10^2   : 4.78258E-02  (-0.0478258   0.126929)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.64 using 59 PHA bins.
# Reduced chi-squared =         0.9586 for     57 degrees of freedom 
# Null hypothesis probability =   5.640828e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.764e-09   1.785e-09
25- 50  1.212e-08   7.425e-09
50-150  2.440e-08   1.633e-08
15-150  3.929e-08   2.526e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-199.363      -199.363)
Norm        : 2.56663       (-0.853844     1.14927)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.56 using 59 PHA bins.
# Reduced chi-squared =         0.9396 for     57 degrees of freedom 
# Null hypothesis probability =   6.050176e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.391e-09   4.032e-09
25- 50  1.229e-08   7.475e-09
50-150  2.696e-08   1.627e-08
15-150  4.565e-08   2.764e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.80054        (-2.8076      37.3183)
R1^2/D10^2  : 41.5658        (-41.3032      412.202)
kT2 [keV]   : 19.1661        (-6.20499      14.3349)
R2^2/D10^2  : 2.83454E-02    (-0.0283211   0.0328629)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.97 using 59 PHA bins.
# Reduced chi-squared =         0.9449 for     55 degrees of freedom 
# Null hypothesis probability =   5.910826e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.044e-09   4.101e-09
25- 50  1.044e-08   6.080e-09
50-150  2.670e-08   1.746e-08
15-150  4.419e-08   2.302e-08
Plot creation:
Sat Sep 26 04:31:59 EDT 2015