batgrbproduct analysis for trigger=817564

batgrbproduct Analysis for Trigger=817564

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Mar 25 16:53:28 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger817564/batgroup_hand_proc
======================================================================

  Trigger: 00817564      Segment: 000

  BAT Trigger Time: 543635603.52   [s; MET]
      Trigger Stop: 543635604.032   [s; MET]
               UTC: 2018-03-25T01:53:02.842480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 157.431990917944   Dec: 24.4392523978687  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.22
     Image Trigger?:     NO
     Rate S/N Ratio:     19.6468827043885  [ if not an image trigger ]
     Image S/N Ratio:    10.22

  Flight Position:   [ source = BAT ]
    RA: 157.431990917944   Dec: 24.4392523978687  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 157.41608627085   Dec: 24.4610193873526  [deg; J2000]  
        { 10h 29m 39.9s , +24d 27' 39.7" }
         +/- 1.13584751102015 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.455510262292124 [arcmin] (formal 1-sigma fit error)
    SNR: 25.3565267258264
 
  Angular difference between Flight and Ground position is 1.568543 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 94.1439999341965 +/- 1.47985949191353
        Measured from: 1.75199997425079
                   to: 95.8959999084473     [s; relative to TRIGTIME]
     T50: 5.07999992370605 +/- 0.498477680674676
        Measured from: 78.5680000782013
                   to: 83.6480000019073     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 80.7519999742508     
                   to: 81.7519999742508     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00800001621246338     
                   to: 107.888000011444     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.020440   3.417914   3.180213   0.876699
           0.068324   0.073195   0.065947   0.055128 [error]
 Peak      0.213281   0.406780   0.462049   0.171957
           0.010046   0.012983   0.013886   0.010496 [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 6.02e-07 1.35e-06 2.38e-06 9.88e-06 6.50e-06 1.42e-05   erg/cm2
              Error 3.26e-08 4.22e-08 6.72e-08 6.65e-07 1.72e-07 6.92e-07   erg/cm2
Peak flux Power-law 1.84e+00 2.71e+00 2.98e+00 6.17e+00 9.41e+00 1.37e+01   ph/cm2/s
              Error 1.36e-01 1.19e-01 1.09e-01 5.12e-01 3.22e-01 5.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.66e-07 1.36e-06 2.44e-06 7.37e-06 6.42e-06 1.17e-05   erg/cm2
              Error 4.27e-08 4.45e-08 7.97e-08 1.72e-06 1.86e-07 1.71e-06   erg/cm2
Peak flux Cutoff-PL 1.80e+00 2.67e+00 2.99e+00 6.35e+00 9.39e+00 1.38e+01   ph/cm2/s
              Error 1.31e-01 1.29e-01 1.38e-01 1.13e+00 3.24e-01 1.18e+00   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    1.178    0.047    -      -           5.90e-03 1.48e-04   67.840 57
CPL   0.948    0.188     266.2  408.1      7.43e-03 1.37e-03   63.270 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    0.862    0.062    -      -           8.20e-02 2.81e-03   41.590 57
CPL   0.856    0.162    9998.0    0.0      8.25e-02 1.45e-02   41.550 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: 89.152000 sec.
T50 in the 50-300 keV band: 3.520000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  107.896   -0.008  107.888
T90    94.144    1.752   95.896
T50     5.080   78.568   83.648
Peak    1.000   80.752   81.752

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  157.4161    24.4610   0.0076    15.5980   138.0260         1.1548683     25.357 TRIG_00817564                 
 
Foreground time interval of the image:
 -0.008  10.981 (delta_t =  10.989 [sec])
Background time interval of the image:
-239.520  -0.008 (delta_t = 239.512 [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   -0.008 sec. to  107.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17803     ( -0.0471231   0.0469008 )
Norm@50keV  : 5.90429E-03    ( -0.000148539   0.000148421 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.84 using 59 PHA bins.
# Reduced chi-squared =          1.190 for     57 degrees of freedom 
# Null hypothesis probability =   1.541024e-01
 
Photon flux (15-150 keV)    in 107.9 sec: 0.690976 ( -0.0185738  0.0186142 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.50415e-06 ( -1.71854e-07  1.72121e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.008 sec. to  107.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.948304     ( -0.192381   0.184225 )
Epeak [keV] : 266.172      ( -94.2475 721.976 )
Norm@50keV  : 7.42647E-03    ( -0.00121878   0.00152243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.27 using 59 PHA bins.
# Reduced chi-squared =          1.130 for     56 degrees of freedom 
# Null hypothesis probability =   2.351704e-01
 
Photon flux (15-150 keV)    in 107.9 sec: 0.680620 ( -0.020163  0.020214 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.42307e-06 ( -1.86041e-07  1.85318e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.008 sec. to  107.888 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.104903   ( -0.709544   0.439648 )
beta        : -1.24097    ( 1.2403   0.0732279 )
Epeak [keV] : 62.1704      ( -31.8247 190.116 )
Norm@50keV   : 2.63281E-02    ( -0.0166045   86.9114 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.18 using 59 PHA bins.
# Reduced chi-squared =          1.131 for     55 degrees of freedom 
# Null hypothesis probability =   2.357983e-01
 
Photon flux (15-150 keV)    in 107.9 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]    : 20.6690  (  )
R^2/D10^2   : 2.81260E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         315.94 using 59 PHA bins.
# Reduced chi-squared =         5.5428 for     57 degrees of freedom 
# Null hypothesis probability =   1.508917e-37
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.466e-07   1.300e-08
25- 50  1.255e-06   4.748e-08
50-150  3.990e-06   1.645e-07
15-150  5.491e-06   1.597e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 2.94547       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         258.04 using 59 PHA bins.
# Reduced chi-squared =         4.5270 for     57 degrees of freedom 
# Null hypothesis probability =   2.265997e-27
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.914e-07   2.180e-08
25- 50  1.522e-06   3.938e-08
50-150  3.339e-06   8.254e-08
15-150  5.653e-06   1.683e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.35507        (-0.887109      0.975905)
R1^2/D10^2  : 0.306821        (-0.0878934      0.133501)
kT2 [keV]   : 32.8490        (-3.01093      4.0941)
R2^2/D10^2  : 5.31858E-03    (-0.0016934   0.00203575)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.51 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     55 degrees of freedom 
# Null hypothesis probability =   2.544112e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.222e-07   5.071e-08
25- 50  1.396e-06   9.819e-08
50-150  4.522e-06   3.507e-07
15-150  6.441e-06   3.944e-07

Peak spectrum fit

Power-law model
Time interval is from   80.752 sec. to   81.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.862383     ( -0.062463   0.0620003 )
Norm@50keV  : 8.19774E-02    ( -0.00281845   0.00281093 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7296 for     57 degrees of freedom 
# Null hypothesis probability =   9.376083e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.40908 ( -0.321844  0.322068 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.3376e-07 ( -3.53852e-08  3.55099e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   80.752 sec. to   81.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.855530     ( -0.245101   0.0794012 )
Epeak [keV] : 9998.01      ( -9997.89 -9997.89 )
Norm@50keV  : 8.25362E-02    ( -0.0027927   0.0262562 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.55 using 59 PHA bins.
# Reduced chi-squared =         0.7420 for     56 degrees of freedom 
# Null hypothesis probability =   9.249965e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.39379 ( -0.31671  0.3316 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.31379e-07 ( -3.5954e-08  3.7513e-08 ) ergs/cm2
 
Band function
Time interval is from   80.752 sec. to   81.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.842608   ( 0.842608   0.842608 )
beta        : -0.862384    ( -0.061993   0.0624761 )
Epeak [keV] : 16.2901      ( -16.2901 -16.2901 )
Norm@50keV   : 0.116214    ( -0.0370116   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.59 using 59 PHA bins.
# Reduced chi-squared =         0.7561 for     55 degrees of freedom 
# Null hypothesis probability =   9.091696e-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]    : 24.5048  (  )
R^2/D10^2   : 0.248607  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         182.42 using 59 PHA bins.
# Reduced chi-squared =         3.2003 for     57 degrees of freedom 
# Null hypothesis probability =   4.829565e-15
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.621e-08   1.625e-09
25- 50  1.471e-07   7.650e-09
50-150  6.569e-07   3.555e-08
15-150  8.303e-07   3.790e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 36.6556       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         359.80 using 59 PHA bins.
# Reduced chi-squared =         6.3123 for     57 degrees of freedom 
# Null hypothesis probability =   1.570958e-45
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.128e-08   3.295e-09
25- 50  1.756e-07   6.500e-09
50-150  3.851e-07   1.390e-08
15-150  6.519e-07   2.385e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.31789        (-1.39614      1.58433)
R1^2/D10^2  : 2.50946        (-0.874763      1.52981)
kT2 [keV]   : 42.4560        (-6.1241      10.3047)
R2^2/D10^2  : 4.32452E-02    (-0.0193886   0.0214615)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.75 using 59 PHA bins.
# Reduced chi-squared =         0.7409 for     55 degrees of freedom 
# Null hypothesis probability =   9.240239e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.278e-08   7.475e-09
25- 50  1.636e-07   1.845e-08
50-150  7.269e-07   9.660e-08
15-150  9.432e-07   1.102e-07
Plot creation:
Sun Mar 25 17:00:43 EDT 2018