batgrbproduct analysis for trigger=971846

batgrbproduct Analysis for Trigger=971846

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.47
    Process Start Time (local time): Wed May 13 14:20:24 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger971846/GCN5_download_cron
======================================================================

  Trigger: 00971846      Segment: 000

  BAT Trigger Time: 611008420.864   [s; MET]
      Trigger Stop: 611008424.96   [s; MET]
               UTC: 2020-05-12T20:33:15.934300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 7.39573675700765   Dec: -2.1987561754583  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.66
     Image Trigger?:     NO
     Rate S/N Ratio:     8.60232526704263  [ if not an image trigger ]
     Image S/N Ratio:    7.66

  Flight Position:   [ source = BAT ]
    RA: 7.39573675700765   Dec: -2.1987561754583  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 7.41747981904924   Dec: -2.21696965411524  [deg; J2000]  
        { 00h 29m 40.2s , -02d 13' 01.1" }
         +/- 1.4788859995373 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.649624828433069 [arcmin] (formal 1-sigma fit error)
    SNR: 17.3922002185818
 
  Angular difference between Flight and Ground position is 1.701071 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 74 +/- 14.3178210632764
        Measured from: -0.863999843597412
                   to: 73.1360001564026     [s; relative to TRIGTIME]
     T50: 26 +/- 8.24621125123532
        Measured from: 5.13600015640259
                   to: 31.1360001564026     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.1360000371933     
                   to: 4.1360000371933     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.8639999628067     
                   to: 78.1360000371933     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.487748   0.547897   0.338467   0.100977
           0.047352   0.048793   0.042820   0.037695 [error]
 Peak      0.013921   0.021149   0.011555   0.009988
           0.005237   0.005567   0.004921   0.004219 [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 1.32e-07 2.16e-07 2.70e-07 6.66e-07 8.05e-07 1.28e-06   erg/cm2
              Error 2.00e-08 2.12e-08 4.08e-08 2.08e-07 9.53e-08 2.46e-07   erg/cm2
Peak flux Power-law 1.15e-01 1.28e-01 1.02e-01 1.35e-01 3.96e-01 4.81e-01   ph/cm2/s
              Error 5.92e-02 4.27e-02 3.83e-02 1.07e-01 1.21e-01 1.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.26e-07 2.27e-07 2.70e-07 3.35e-07 7.71e-07 9.58e-07   erg/cm2
              Error 2.28e-08 2.87e-08 4.38e-08 3.31e-07 1.12e-07 3.36e-07   erg/cm2
Peak flux Cutoff-PL 1.08e-01 1.51e-01 9.69e-02 2.58e-02 3.76e-01 3.80e-01   ph/cm2/s
              Error 8.91e-02 8.01e-02 -------- 1.34e-01 1.45e-01 2.02e-01   ph/cm2/s
 
Fluence        Band 1.23e-07 2.30e-07 2.64e-07 4.60e-07 7.71e-07 1.08e-06   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    1.683    0.179    -      -           1.07e-03 1.19e-04   71.290 57
CPL   1.281    0.611      80.2  -23.2      1.78e-03 0.00e+00   70.410 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.326    0.527    -      -           3.30e-03 1.02e-03   68.300 57
CPL  -1.847    5.065      46.0  -17.3      2.76e-01 5.23e+02   68.270 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: 16.512000 sec.
T50 in the 50-300 keV band: 8.128000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   81.000   -2.864   78.136
T90    74.000   -0.864   73.136
T50    26.000    5.136   31.136
Peak    1.000    3.136    4.136

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
    7.4175  -2.2170 0.0110    5.5 -120.3       1.1304    17.4  TRIG_00971846       
------------------------------------------
 
Foreground time interval of the image:
 -2.864  35.837 (delta_t =  38.701 [sec])
Background time interval of the image:
-239.864 -48.074 (delta_t = 191.790 [sec])
-46.864  -2.864 (delta_t =  44.000 [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   -2.864 sec. to   78.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68324     ( -0.176785   0.182063 )
Norm@50keV  : 1.07210E-03    ( -0.000119595   0.000117626 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.29 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     57 degrees of freedom 
# Null hypothesis probability =   9.652533e-02
 
Photon flux (15-150 keV)    in 81 sec: 0.141562 ( -0.0138987  0.0139032 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.05155e-07 ( -9.44808e-08  9.62061e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.864 sec. to   78.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28106     ( -0.858708   0.36387 )
Epeak [keV] : 80.2419      ( -33.7883 -80.2515 )
Norm@50keV  : 1.78400E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.41 using 59 PHA bins.
# Reduced chi-squared =          1.257 for     56 degrees of freedom 
# Null hypothesis probability =   9.319434e-02
 
Photon flux (15-150 keV)    in 81 sec: 0.139021 ( -0.014692  0.014614 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.71092e-07 ( -1.11276e-07  1.1338e-07 ) ergs/cm2
 
Band function
Time interval is from   -2.864 sec. to   78.136 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.09790   ( 1.09884   1.09884 )
beta        : -2.05082    ( 2.04903   0.495743 )
Epeak [keV] : 65.3592      ( -65.5371 350.767 )
Norm@50keV   : 2.29884E-03    ( -0.00128598   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.04 using 59 PHA bins.
# Reduced chi-squared =          1.273 for     55 degrees of freedom 
# Null hypothesis probability =   8.331442e-02
 
Photon flux (15-150 keV)    in 81 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.70737e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.1498  (-1.39069  1.59537)
R^2/D10^2   : 3.28812E-02  (-0.0118842   0.018323)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.90 using 59 PHA bins.
# Reduced chi-squared =          1.560 for     57 degrees of freedom 
# Null hypothesis probability =   4.363743e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.324e-08   1.430e-08
25- 50  2.658e-07   3.532e-08
50-150  2.378e-07   5.459e-08
15-150  5.869e-07   7.225e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 133.344       (-48.3244      -131.634)
Norm        : 0.589271       (-0.0626921     0.0868786)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.43 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     57 degrees of freedom 
# Null hypothesis probability =   1.090214e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.237e-07   1.709e-08
25- 50  2.251e-07   5.079e-08
50-150  4.223e-07   2.185e-07
15-150  7.711e-07   2.909e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.66628        (-2.31456      4.19165)
R1^2/D10^2  : 0.302137        (-0.233404      2.13906)
kT2 [keV]   : 18.9681        (-4.89506      52.0189)
R2^2/D10^2  : 5.11716E-03    (-0.00490755   0.00519837)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.33 using 59 PHA bins.
# Reduced chi-squared =          1.315 for     55 degrees of freedom 
# Null hypothesis probability =   5.855499e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.250e-07   6.283e-08
25- 50  2.250e-07   1.096e-07
50-150  3.785e-07   2.048e-07
15-150  7.285e-07   3.350e-07

Peak spectrum fit

Power-law model
Time interval is from    3.136 sec. to    4.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32626     ( -0.538693   0.514472 )
Norm@50keV  : 3.29930E-03    ( -0.00102082   0.0010109 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.30 using 59 PHA bins.
# Reduced chi-squared =          1.198 for     57 degrees of freedom 
# Null hypothesis probability =   1.453318e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.395582 ( -0.120626  0.120829 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.23998e-08 ( -1.10085e-08  1.14461e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.136 sec. to    4.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.84670     ( -6.4802   3.64908 )
Epeak [keV] : 46.0278      ( -11.6207 -46.1908 )
Norm@50keV  : 0.276215    ( -0.254209   1045.92 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.27 using 59 PHA bins.
# Reduced chi-squared =          1.219 for     56 degrees of freedom 
# Null hypothesis probability =   1.258907e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.375960 0.347418 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.07373e-08 ( -1.72211e-08  1.30611e-08 ) ergs/cm2
 
Band function
Time interval is from    3.136 sec. to    4.136 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -4.94601   -4.94601 )
beta        : -1.69002    ( -3.84567   0.692258 )
Epeak [keV] : 29.6049      ( -29.605 15.3285 )
Norm@50keV   : 127.438    ( -37.198   1.36521e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.14 using 59 PHA bins.
# Reduced chi-squared =          1.203 for     55 degrees of freedom 
# Null hypothesis probability =   1.443761e-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]    : 12.0487  (-3.09841  5.0755)
R^2/D10^2   : 0.101953  (-0.101955   0.192026)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.35 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     57 degrees of freedom 
# Null hypothesis probability =   1.443598e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.131e-09   1.977e-09
25- 50  9.902e-09   6.080e-09
50-150  8.667e-09   6.380e-09
15-150  2.170e-08   1.366e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-199.363      -199.363)
Norm        : 1.62609       (-0.494079     0.494079)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.60 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     57 degrees of freedom 
# Null hypothesis probability =   1.395582e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.049e-09   2.547e-09
25- 50  7.789e-09   4.732e-09
50-150  1.708e-08   1.047e-08
15-150  2.892e-08   1.751e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 6.28022E-05        (-4.41009e-05      0.00053775)
kT2 [keV]   : 10.0067        (-2.66218      3.81549)
R2^2/D10^2  : 0.169329    (-0.10987   0.365675)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.19 using 59 PHA bins.
#Fit statistic : Chi-Squared =          63.89 using 59 PHA bins.
# Reduced chi-squared =          1.167 for     55 degrees of freedom 
# Reduced chi-squared =          1.162 for     55 degrees of freedom 
# Null hypothesis probability =   1.856019e-01
# Null hypothesis probability =   1.924209e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.514e-09   2.127e-09
25- 50  9.167e-09   5.705e-09
50-150  1.749e-08   4.925e-09
15-150  3.017e-08   1.305e-08
Plot creation:
Wed May 13 14:24:11 EDT 2020