batgrbproduct analysis for trigger=770957

batgrbproduct Analysis for Trigger=770957

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Sep  6 11:17:06 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger770957/batgroup_hand_proc
======================================================================

  Trigger: 00770957      Segment: 000

  BAT Trigger Time: 526351411.264   [s; MET]
      Trigger Stop: 526351412.288   [s; MET]
               UTC: 2017-09-06T00:43:11.622660    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 203.991655598506   Dec: -47.124728592814  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.35
     Image Trigger?:     NO
     Rate S/N Ratio:     24.3104915622864  [ if not an image trigger ]
     Image S/N Ratio:    8.35

  Flight Position:   [ source = BAT ]
    RA: 203.991655598506   Dec: -47.124728592814  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 203.94882333583   Dec: -47.088414842653  [deg; J2000]  
        { 13h 35m 47.7s , -47d 05' 18.3" }
         +/- 1.3358429490884 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.486771790929972 [arcmin] (formal 1-sigma fit error)
    SNR: 20.112580946711
 
  Angular difference between Flight and Ground position is 2.794093 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 88.1039999127388 +/- 1.46661657727836
        Measured from: 7.65200001001358
                   to: 95.7559999227524     [s; relative to TRIGTIME]
     T50: 42.0799999237061 +/- 0.444000013776728
        Measured from: 30.2360000014305
                   to: 72.3159999251366     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 29.8199999928474     
                   to: 30.8199999928474     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -44.9399999976158     
                   to: 121.463999986649     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    13.151544  18.534298  15.030155   3.714733
           0.117375   0.118676   0.105657   0.081011 [error]
 Peak      0.284036   0.470221   0.482579   0.157754
           0.012453   0.014823   0.015034   0.011285 [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 4.12e-06 7.79e-06 1.14e-05 3.54e-05 3.22e-05 5.87e-05   erg/cm2
              Error 1.25e-07 1.40e-07 1.53e-07 1.12e-06 4.12e-07 1.14e-06   erg/cm2
Peak flux Power-law 2.57e+00 3.34e+00 3.18e+00 5.36e+00 1.09e+01 1.44e+01   ph/cm2/s
              Error 1.83e-01 1.42e-01 1.22e-01 4.52e-01 3.83e-01 5.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.80e-06 7.80e-06 1.17e-05 2.78e-05 3.19e-05 5.11e-05   erg/cm2
              Error 1.76e-07 1.43e-07 2.01e-07 2.82e-06 4.33e-07 2.83e-06   erg/cm2
Peak flux Cutoff-PL 2.49e+00 3.36e+00 3.22e+00 4.71e+00 1.08e+01 1.38e+01   ph/cm2/s
              Error 2.28e-01 1.49e-01 1.49e-01 1.02e+00 3.99e-01 1.04e+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    1.454    0.024    -      -           2.02e-02 2.77e-04   52.700 57
CPL   1.212    0.104     205.4   71.9      2.53e-02 2.35e-03   36.350 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    1.072    0.062    -      -           9.40e-02 3.22e-03   49.980 57
CPL   0.950    0.215     494.9    0.0      1.07e-01 2.17e-02   49.170 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: 80.448000 sec.
T50 in the 50-300 keV band: 34.816000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  166.404  -44.940  121.464
T90    88.104    7.652   95.756
T50    42.080   30.236   72.316
Peak    1.000   29.820   30.820

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  203.9488   -47.0884   0.0096    20.6719   -86.8862         3.7090745     20.113 TRIG_00770957                 
 
Foreground time interval of the image:
-44.940  13.037 (delta_t =  57.977 [sec])
Background time interval of the image:
-98.363 -44.940 (delta_t =  53.423 [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  -44.940 sec. to  121.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45384     ( -0.0243128   0.0242385 )
Norm@50keV  : 2.02491E-02    ( -0.000276707   0.000276308 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.70 using 59 PHA bins.
# Reduced chi-squared =         0.9245 for     57 degrees of freedom 
# Null hypothesis probability =   6.370698e-01
 
Photon flux (15-150 keV)    in 166.4 sec: 2.49781 ( -0.0417939  0.0419581 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.22205e-05 ( -4.12331e-07  4.12309e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -44.940 sec. to  121.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21208     ( -0.104937   0.102844 )
Epeak [keV] : 205.386      ( -42.8389 100.888 )
Norm@50keV  : 2.52602E-02    ( -0.00222206   0.00247986 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.35 using 59 PHA bins.
# Reduced chi-squared =         0.6492 for     56 degrees of freedom 
# Null hypothesis probability =   9.806714e-01
 
Photon flux (15-150 keV)    in 166.4 sec: 2.43904 ( -0.04737  0.04775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.192e-05 ( -4.32973e-07  4.32806e-07 ) ergs/cm2
 
Band function
Time interval is from  -44.940 sec. to  121.464 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.930541   ( -0.351845   0.46627 )
beta        : -1.54468    ( 1.54488   0.0511727 )
Epeak [keV] : 100.859      ( -37.0426 153.14 )
Norm@50keV   : 3.59540E-02    ( -0.012278   0.0320913 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.42 using 59 PHA bins.
# Reduced chi-squared =         0.6441 for     55 degrees of freedom 
# Null hypothesis probability =   9.814195e-01
 
Photon flux (15-150 keV)    in 166.4 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]    : 20.2158  (  )
R^2/D10^2   : 9.83878E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1126.56 using 59 PHA bins.
# Reduced chi-squared =        19.7641 for     57 degrees of freedom 
# Null hypothesis probability =  1.902556e-198
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.284e-06   3.794e-08
25- 50  6.443e-06   1.389e-07
50-150  1.955e-05   3.245e-07
15-150  2.727e-05   3.494e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 10.6468       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         180.24 using 59 PHA bins.
# Reduced chi-squared =         3.1621 for     57 degrees of freedom 
# Null hypothesis probability =   1.035589e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.411e-06   7.072e-08
25- 50  8.486e-06   1.431e-07
50-150  1.861e-05   2.995e-07
15-150  3.151e-05   5.325e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.98456        (-0.482163      0.497839)
R1^2/D10^2  : 1.00176        (-0.160292      0.201184)
kT2 [keV]   : 32.5325        (-1.6431      1.92779)
R2^2/D10^2  : 1.52038E-02    (-0.00282752   0.00316213)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.65 using 59 PHA bins.
# Reduced chi-squared =         0.9572 for     55 degrees of freedom 
# Null hypothesis probability =   5.650997e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.016e-06   1.464e-07
25- 50  8.083e-06   1.914e-07
50-150  2.038e-05   4.742e-07
15-150  3.148e-05   5.990e-07

Peak spectrum fit

Power-law model
Time interval is from   29.820 sec. to   30.820 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07233     ( -0.0619755   0.0616821 )
Norm@50keV  : 9.40327E-02    ( -0.00322469   0.00322231 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.98 using 59 PHA bins.
# Reduced chi-squared =         0.8768 for     57 degrees of freedom 
# Null hypothesis probability =   7.335356e-01
 
Photon flux (15-150 keV)    in 1 sec: 10.8798 ( -0.383157  0.383469 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.91992e-07 ( -3.75348e-08  3.76146e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   29.820 sec. to   30.820 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.950381     ( -0.241792   0.187472 )
Epeak [keV] : 494.920      ( -494.92 -494.92 )
Norm@50keV  : 0.106569    ( -0.0145067   0.0289933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.17 using 59 PHA bins.
# Reduced chi-squared =         0.8781 for     56 degrees of freedom 
# Null hypothesis probability =   7.290124e-01
 
Photon flux (15-150 keV)    in 1 sec: 10.8178 ( -0.3994  0.3995 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.8657e-07 ( -3.9503e-08  3.932e-08 ) ergs/cm2
 
Band function
Time interval is from   29.820 sec. to   30.820 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99996   ( -4.99996   -4.99996 )
beta        : -1.09186    ( -0.0648043   0.0645292 )
Epeak [keV] : 24.0183      ( -24.0183 3.77186 )
Norm@50keV   : 8496.69    ( -289.351   1.59558e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.09 using 59 PHA bins.
# Reduced chi-squared =         0.8744 for     55 degrees of freedom 
# Null hypothesis probability =   7.336799e-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]    : 21.1451  (  )
R^2/D10^2   : 0.429800  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         206.77 using 59 PHA bins.
# Reduced chi-squared =         3.6275 for     57 degrees of freedom 
# Null hypothesis probability =   7.452229e-19
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.620e-08   2.470e-09
25- 50  1.869e-07   9.150e-09
50-150  6.231e-07   3.655e-08
15-150  8.461e-07   3.500e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 44.6245       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         214.77 using 59 PHA bins.
# Reduced chi-squared =         3.7678 for     57 degrees of freedom 
# Null hypothesis probability =   3.827173e-20
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.111e-07   4.050e-09
25- 50  2.137e-07   7.650e-09
50-150  4.688e-07   1.695e-08
15-150  7.937e-07   3.025e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.77900        (-1.25594      1.38792)
R1^2/D10^2  : 4.03329        (-1.39178      2.46219)
kT2 [keV]   : 36.9692        (-4.92767      7.70843)
R2^2/D10^2  : 6.33632E-02    (-0.0275467   0.0367232)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.19 using 59 PHA bins.
# Reduced chi-squared =         0.9126 for     55 degrees of freedom 
# Null hypothesis probability =   6.585021e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.153e-08   1.039e-08
25- 50  2.007e-07   2.080e-08
50-150  7.227e-07   9.375e-08
15-150  9.949e-07   1.302e-07
Plot creation:
Wed Sep  6 12:21:58 EDT 2017