batgrbproduct Analysis for Trigger=640584

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu May 14 12:19:13 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger640584/batgroup_hand_proc
======================================================================

  Trigger: 00640584      Segment: 000

  BAT Trigger Time: 453241893.312   [s; MET]
      Trigger Stop: 453241895.36   [s; MET]
               UTC: 2015-05-13T20:31:19.736540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 49.0579234177396   Dec: -22.9128777277239  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.43
     Image Trigger?:     NO
     Rate S/N Ratio:     14.247806848775  [ if not an image trigger ]
     Image S/N Ratio:    7.43

  Flight Position:   [ source = BAT ]
    RA: 49.0579234177396   Dec: -22.9128777277239  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 49.0440736765469   Dec: -22.8675796361554  [deg; J2000]  
        { 03h 16m 10.6s , -22d 52' 03.3" }
         +/- 0.944550866385861 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.350068154364022 [arcmin] (formal 1-sigma fit error)
    SNR: 32.9997565616832
 
  Angular difference between Flight and Ground position is 2.823643 arcmin
 
  Partial Coding Fraction: 0.640625    [ including projection effects ]

  Duration
     T90: 161.627999961376 +/- 4.88357406102109
        Measured from: -42.5479999780655
                   to: 119.079999983311     [s; relative to TRIGTIME]
     T50: 92.1399999856949 +/- 4.80028163093598
        Measured from: -21.027999997139
                   to: 71.1119999885559     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 115.412000000477     
                   to: 116.412000000477     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -54.3319999575615     
                   to: 129.360000014305     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.875990   2.884776   2.479810   0.670681
           0.103327   0.104427   0.092036   0.076763 [error]
 Peak      0.090330   0.122027   0.107183   0.022613
           0.009309   0.009994   0.009204   0.006710 [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 6.49e-07 1.27e-06 1.92e-06 6.31e-06 5.39e-06 1.01e-05   erg/cm2
              Error 5.11e-08 5.88e-08 9.24e-08 6.88e-07 2.30e-07 7.38e-07   erg/cm2
Peak flux Power-law 9.37e-01 9.63e-01 6.97e-01 8.09e-01 2.91e+00 3.41e+00   ph/cm2/s
              Error 1.44e-01 9.07e-02 7.55e-02 1.81e-01 2.58e-01 2.98e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.17e-07 1.29e-06 1.96e-06 4.65e-06 5.32e-06 8.51e-06   erg/cm2
              Error 6.36e-08 6.48e-08 1.05e-07 1.23e-06 2.46e-07 1.40e-06   erg/cm2
Peak flux Cutoff-PL 9.08e-01 9.76e-01 7.09e-01 6.78e-01 2.89e+00 3.27e+00   ph/cm2/s
              Error 1.72e-01 1.03e-01 8.68e-02 3.10e-01 2.66e-01 4.19e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 9.05e-01 9.77e-01 7.10e-01 6.70e-01 2.89e+00 3.27e+00   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    1.401    0.073    -      -           3.04e-03 1.22e-04   76.820 57
CPL   1.174    0.273     199.2  -58.7      3.87e-03 1.12e-03   74.800 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared 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    1.466    0.151    -      -           2.35e-02 2.06e-03   68.350 57
CPL   1.307    0.463     230.3    0.0      2.81e-02 1.80e-02   68.130 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: 163.072000 sec.
T50 in the 50-300 keV band: 74.112000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  183.692  -54.332  129.360
T90   161.628  -42.548  119.080
T50    92.140  -21.028   71.112
Peak    1.000  115.412  116.412

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   49.0441   -22.8676   0.0058    35.2233   -28.5426         8.7191534     33.000 TRIG_00640584                 
 
Foreground time interval of the image:
-54.332 129.360 (delta_t = 183.692 [sec])
Background time interval of the image:
-239.312 -54.332 (delta_t = 184.980 [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  -54.332 sec. to  129.360 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40130     ( -0.0726493   0.072422 )
Norm@50keV  : 3.03674E-03    ( -0.000121501   0.000121501 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          76.82 using 59 PHA bins.
# Reduced chi-squared =          1.348 for     57 degrees of freedom 
# Null hypothesis probability =   4.118267e-02
 
Photon flux (15-150 keV)    in 183.7 sec: 0.369927 ( -0.0159919  0.0160333 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.38888e-06 ( -2.29544e-07  2.29983e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -54.332 sec. to  129.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17374     ( -0.2907   0.254468 )
Epeak [keV] : 199.182      ( -81.7365 -199.182 )
Norm@50keV  : 3.87169E-03    ( -0.000885482   0.00135759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.80 using 59 PHA bins.
# Reduced chi-squared =          1.336 for     56 degrees of freedom 
# Null hypothesis probability =   4.736729e-02
 
Photon flux (15-150 keV)    in 183.7 sec: 0.364984 ( -0.016978  0.017012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32012e-06 ( -2.46581e-07  2.45644e-07 ) ergs/cm2
 
Band function
Time interval is from  -54.332 sec. to  129.360 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.880501   ( -0.879389   -0.879389 )
beta        : -1.44347    ( 1.44347   0.0908074 )
Epeak [keV] : 33.1880      ( -33.2062 121.536 )
Norm@50keV   : 0.134195    ( -0.133137   118.609 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.66 using 59 PHA bins.
# Reduced chi-squared =          1.357 for     55 degrees of freedom 
# Null hypothesis probability =   4.001101e-02
 
Photon flux (15-150 keV)    in 183.7 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]    : 17.7630  (  )
R^2/D10^2   : 2.34990E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         205.69 using 59 PHA bins.
# Reduced chi-squared =         3.6086 for     57 degrees of freedom 
# Null hypothesis probability =   1.107191e-18
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.738e-07   2.342e-08
25- 50  1.254e-06   7.798e-08
50-150  2.862e-06   1.947e-07
15-150  4.390e-06   1.993e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.54530       (-0.0621058     0.0620912)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.78 using 59 PHA bins.
# Reduced chi-squared =          1.593 for     57 degrees of freedom 
# Null hypothesis probability =   2.952798e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.068e-07   2.994e-08
25- 50  1.360e-06   5.906e-08
50-150  2.982e-06   1.442e-07
15-150  5.049e-06   2.305e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.22436        (-0.97315      1.09975)
R1^2/D10^2  : 0.315800        (-0.119859      0.212782)
kT2 [keV]   : 28.3893        (-3.22737      4.52118)
R2^2/D10^2  : 3.93434E-03    (-0.00157153   0.00212326)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.14 using 59 PHA bins.
# Reduced chi-squared =          1.312 for     55 degrees of freedom 
# Null hypothesis probability =   6.033792e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.962e-07   9.084e-08
25- 50  1.298e-06   1.276e-07
50-150  3.431e-06   4.106e-07
15-150  5.325e-06   5.897e-07

Peak spectrum fit

Power-law model
Time interval is from  115.412 sec. to  116.412 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46566     ( -0.150008   0.15152 )
Norm@50keV  : 2.35376E-02    ( -0.00206579   0.00205892 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.35 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     57 degrees of freedom 
# Null hypothesis probability =   1.443797e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.91212 ( -0.258079  0.258588 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.24601e-07 ( -2.15604e-08  2.16807e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  115.412 sec. to  116.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30688     ( -0.631829   0.295006 )
Epeak [keV] : 230.265      ( -230.24 -230.24 )
Norm@50keV  : 2.81378E-02    ( -0.00819118   0.0278157 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.13 using 59 PHA bins.
# Reduced chi-squared =          1.217 for     56 degrees of freedom 
# Null hypothesis probability =   1.283573e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.89312 ( -0.2671  0.26575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.22834e-07 ( -2.2773e-08  2.2605e-08 ) ergs/cm2
 
Band function
Time interval is from  115.412 sec. to  116.412 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.32421   ( -0.19646   0.287176 )
beta        : -9.17842    ( 9.36208   19.3621 )
Epeak [keV] : 255.527      ( -135.852 -254.147 )
Norm@50keV   : 2.75924E-02    ( -0.00237489   0.0222779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.13 using 59 PHA bins.
# Reduced chi-squared =          1.239 for     55 degrees of freedom 
# Null hypothesis probability =   1.099614e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.89174 (    ) 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]    : 16.4536  (-1.71618  1.94295)
R^2/D10^2   : 0.243506  (-0.0784071   0.11357)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         100.24 using 59 PHA bins.
# Reduced chi-squared =         1.7586 for     57 degrees of freedom 
# Null hypothesis probability =   3.554045e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.354e-08   2.325e-09
25- 50  5.834e-08   7.650e-09
50-150  1.115e-07   1.776e-08
15-150  1.834e-07   1.950e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 11.9318       (-1.03436     1.03436)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.65 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     57 degrees of freedom 
# Null hypothesis probability =   1.213787e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.985e-08   3.305e-09
25- 50  5.743e-08   9.935e-09
50-150  1.260e-07   4.888e-08
15-150  2.132e-07   5.775e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.02285        (-1.65971      2.57795)
R1^2/D10^2  : 9.30081        (-7.15407      26.1565)
kT2 [keV]   : 22.5083        (-3.74356      7.13216)
R2^2/D10^2  : 7.17273E-02    (-0.045472   0.0677735)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.10 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     55 degrees of freedom 
# Null hypothesis probability =   9.563396e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.969e-08   1.417e-08
25- 50  5.087e-08   1.501e-08
50-150  1.356e-07   3.642e-08
15-150  2.162e-07   5.575e-08
Plot creation:
Thu May 14 13:47:25 EDT 2015