batgrbproduct analysis for trigger=882747

batgrbproduct Analysis for Trigger=882747

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Jan 10 05:21:16 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger882747/GCN5_download_cron
======================================================================

  Trigger: 00882747      Segment: 000

  BAT Trigger Time: 568703584   [s; MET]
      Trigger Stop: 568703680   [s; MET]
               UTC: 2019-01-09T05:12:41.780680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 33.2181437048103   Dec: 38.1099859036362  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    19.78
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    19.78

  Flight Position:   [ source = BAT ]
    RA: 33.2181437048103   Dec: 38.1099859036362  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 33.2135475665272   Dec: 38.1109007367732  [deg; J2000]  
        { 02h 12m 51.3s , +38d 06' 39.2" }
         +/- 1.03047143037983 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.372366814010977 [arcmin] (formal 1-sigma fit error)
    SNR: 29.1404051973468
 
  Angular difference between Flight and Ground position is 0.223816 arcmin
 
  Partial Coding Fraction: 0.2851562    [ including projection effects ]

  Duration
     T90: 104.015999913216 +/- 33.4435856216658
        Measured from: 12.2640001773834
                   to: 116.280000090599     [s; relative to TRIGTIME]
     T50: 48.0199999809265 +/- 3.68164527132188
        Measured from: 31.5000001192093
                   to: 79.5200001001358     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 38.8159999847412     
                   to: 39.8159999847412     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 5.86800003051758     
                   to: 205.363999962807     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.168514   4.589600   2.372702   0.360630
           0.144394   0.151006   0.129258   0.108707 [error]
 Peak      0.073761   0.074174   0.074711   0.006285
           0.013726   0.015337   0.012667   0.009441 [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 1.21e-06 1.78e-06 1.95e-06 4.02e-06 6.17e-06 8.96e-06   erg/cm2
              Error 8.47e-08 7.89e-08 1.25e-07 5.29e-07 2.96e-07 6.45e-07   erg/cm2
Peak flux Power-law 6.77e-01 6.20e-01 3.93e-01 3.82e-01 1.85e+00 2.07e+00   ph/cm2/s
              Error 1.95e-01 1.19e-01 9.78e-02 1.83e-01 3.51e-01 3.92e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.77e-07 2.03e-06 1.94e-06 7.11e-07 5.49e-06 5.66e-06   erg/cm2
              Error 1.04e-07 1.09e-07 1.54e-07 3.24e-07 3.36e-07 4.57e-07   erg/cm2
Peak flux Cutoff-PL 5.93e-01 6.79e-01 4.26e-01 1.76e-01 1.81e+00 1.87e+00   ph/cm2/s
              Error 2.35e-01 1.51e-01 1.17e-01 2.82e-01 3.57e-01 4.26e-01   ph/cm2/s
 
Fluence        Band 9.28e-07 2.07e-06 1.86e-06 1.71e-06 5.61e-06 6.60e-06   erg/cm2
              Error 1.09e-07 1.18e-07 1.55e-07 -------- 3.31e-07 8.15e-07   erg/cm2
Peak flux      Band 6.03e-01 6.71e-01 4.24e-01 1.96e-01 1.82e+00 1.89e+00   ph/cm2/s
              Error -------- -------- 1.14e-01 -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.867    0.078    -      -           3.38e-03 1.62e-04   86.100 57
CPL   0.394    0.471      49.7    4.1      2.06e-02 1.29e-02   46.260 56
 
The chi2 of BB fit is 77.93 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    1.659    0.306    -      -           1.41e-02 2.82e-03   63.060 57
CPL   0.835    1.135      70.4  -21.0      3.75e-02 1.17e-01   61.740 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: 82.752000 sec.
T50 in the 50-300 keV band: 36.800000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  199.496    5.868  205.364
T90   104.016   12.264  116.280
T50    48.020   31.500   79.520
Peak    1.000   38.816   39.816

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   33.2135 +38.1109 0.0066   32.7   75.1       9.6805    29.1  TRIG_00882747       
------------------------------------------
 
Foreground time interval of the image:
  5.868 104.701 (delta_t =  98.833 [sec])
Background time interval of the image:
-239.000   5.868 (delta_t = 244.868 [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
Multiple GTIs in the spectrum
tstart tstop
5.868000 111.970000
113.000000 205.364000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86706     ( -0.0778006   0.0789511 )
Norm@50keV  : 3.38215E-03    ( -0.000162246   0.000161434 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.10 using 59 PHA bins.
# Reduced chi-squared =          1.511 for     57 degrees of freedom 
# Null hypothesis probability =   7.660466e-03
 
Photon flux (15-150 keV)    in 198.5 sec: 0.478729 ( -0.0217895  0.0218289 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.17196e-06 ( -2.95781e-07  2.97141e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
5.868000 111.970000
113.000000 205.364000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.393513     ( -0.495564   0.445884 )
Epeak [keV] : 49.6912      ( -3.55614 4.54706 )
Norm@50keV  : 2.05770E-02    ( -0.00861195   0.0172287 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.26 using 59 PHA bins.
# Reduced chi-squared =         0.8261 for     56 degrees of freedom 
# Null hypothesis probability =   8.200711e-01
 
Photon flux (15-150 keV)    in 198.5 sec: 0.442906 ( -0.023644  0.023733 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.49251e-06 ( -3.32408e-07  3.40487e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
5.868000 111.970000
113.000000 205.364000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.393492   ( -0.34733   0.365316 )
beta        : -10.00000    ( 10   3.39035e-06 )
Epeak [keV] : 49.6820      ( -3.50128 4.51297 )
Norm@50keV   : 2.05788E-02    ( -0.00856587   0.00762552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.26 using 59 PHA bins.
# Reduced chi-squared =         0.8411 for     55 degrees of freedom 
# Null hypothesis probability =   7.931563e-01
 
Photon flux (15-150 keV)    in 198.5 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.60747e-06 ( -5.60608e-06  -3.33321e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.8487  (-0.530864  0.557629)
R^2/D10^2   : 0.120673  (-0.0195023   0.0230923)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.93 using 59 PHA bins.
# Reduced chi-squared =          1.367 for     57 degrees of freedom 
# Null hypothesis probability =   3.421815e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.105e-07   5.062e-08
25- 50  2.203e-06   1.072e-07
50-150  1.843e-06   1.872e-07
15-150  4.756e-06   2.253e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 85.9860       (-11.5278      14.6078)
Norm        : 2.20210       (-0.145736     0.157831)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.69 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     57 degrees of freedom 
# Null hypothesis probability =   4.133240e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.139e-06   6.977e-08
25- 50  1.906e-06   8.545e-08
50-150  2.821e-06   2.997e-07
15-150  5.866e-06   3.424e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.21225        (-2.12517      1.31914)
R1^2/D10^2  : 0.236694        (-0.0678056      0.17604)
kT2 [keV]   : 25.0842        (-9.53235      36.4371)
R2^2/D10^2  : 3.21173E-03    (-0.00245152   0.018469)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.94 using 59 PHA bins.
# Reduced chi-squared =         0.8534 for     55 degrees of freedom 
# Null hypothesis probability =   7.720388e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.549e-07   1.205e-07
25- 50  2.126e-06   3.398e-07
50-150  2.552e-06   9.274e-07
15-150  5.533e-06   1.336e-06

Peak spectrum fit

Power-law model
Time interval is from   38.816 sec. to   39.816 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65854     ( -0.298092   0.314081 )
Norm@50keV  : 1.41263E-02    ( -0.00284464   0.00279176 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.06 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.708735e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.84978 ( -0.350356  0.350713 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3127e-07 ( -2.74683e-08  2.78073e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   38.816 sec. to   39.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.835381     ( -1.60778   0.663229 )
Epeak [keV] : 70.4460      ( -28.3821 -70.4481 )
Norm@50keV  : 3.74987E-02    ( -0.0374982   0.196895 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.74 using 59 PHA bins.
# Reduced chi-squared =          1.102 for     56 degrees of freedom 
# Null hypothesis probability =   2.785077e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.81496 ( -0.35837  0.35626 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.27067e-07 ( -2.80154e-08  2.8663e-08 ) ergs/cm2
 
Band function
Time interval is from   38.816 sec. to   39.816 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.836864   ( -0.794565   1.5672 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 70.4433      ( -23.7724 56.8938 )
Norm@50keV   : 3.74447E-02    ( -0.0374447   0.196967 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.74 using 59 PHA bins.
# Reduced chi-squared =          1.123 for     55 degrees of freedom 
# Null hypothesis probability =   2.479389e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.82293 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29605e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.4082  (-2.7801  3.44259)
R^2/D10^2   : 0.247986  (-0.134809   0.28675)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.44 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     57 degrees of freedom 
# Null hypothesis probability =   1.838045e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.084e-08   4.049e-09
25- 50  4.147e-08   1.311e-08
50-150  5.751e-08   2.307e-08
15-150  1.098e-07   3.148e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 151.568       (-76.5918      -149.39)
Norm        : 7.71985       (-1.54491     2.06152)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.10 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     57 degrees of freedom 
# Null hypothesis probability =   2.993101e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.981e-08   1.127e-08
25- 50  3.677e-08   2.018e-08
50-150  7.290e-08   4.442e-08
15-150  1.295e-07   7.535e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.73328        (-1.95873      4.46493)
R1^2/D10^2  : 20.3228        (-19.3578      1837.46)
kT2 [keV]   : 17.5287        (-3.94505      7.13943)
R2^2/D10^2  : 0.109657    (-0.0828795   0.177522)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.36 using 59 PHA bins.
# Reduced chi-squared =          1.097 for     55 degrees of freedom 
# Null hypothesis probability =   2.882086e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.990e-08   1.051e-08
25- 50  3.469e-08   1.727e-08
50-150  6.829e-08   4.242e-08
15-150  1.229e-07   6.369e-08
Plot creation:
Thu Jan 10 05:25:05 EST 2019