batgrbproduct analysis for trigger=998907

batgrbproduct Analysis for Trigger=998907

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Tue Oct  6 14:59:38 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger998907/batgroup_hand_proc
======================================================================

  Trigger: 00998907      Segment: 000

  BAT Trigger Time: 623639897.792   [s; MET]
      Trigger Stop: 623639898.304   [s; MET]
               UTC: 2020-10-06T01:17:52.036340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 61.8805369706886   Dec: 65.1498487714513  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.04
     Image Trigger?:     NO
     Rate S/N Ratio:     20.1990098767242  [ if not an image trigger ]
     Image S/N Ratio:    8.04

  Flight Position:   [ source = BAT ]
    RA: 61.8805369706886   Dec: 65.1498487714513  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 61.9170420345316   Dec: 65.1481394374931  [deg; J2000]  
        { 04h 07m 40.1s , +65d 08' 53.3" }
         +/- 2.05758310168445 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.969540651508817 [arcmin] (formal 1-sigma fit error)
    SNR: 10.8508803217529
 
  Angular difference between Flight and Ground position is 0.926193 arcmin
 
  Partial Coding Fraction: 0.3359375    [ including projection effects ]

  Duration
     T90: 0.491999864578247 +/- 0.0856036610542782
        Measured from: 0.0279999971389771
                   to: 0.519999861717224     [s; relative to TRIGTIME]
     T50: 0.24399995803833 +/- 0.0920869208510307
        Measured from: 0.131999969482422
                   to: 0.375999927520752     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.230000019073486     
                   to: 0.769999980926514     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00800001621246338     
                   to: 0.543999910354614     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.042987   0.093980   0.066666   0.021653
           0.010638   0.012310   0.010622   0.008562 [error]
 Peak      0.056167   0.132179   0.074053   0.003812
           0.013569   0.015138   0.013209   0.011387 [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 1.61e-08 3.11e-08 4.65e-08 1.50e-07 1.31e-07 2.43e-07   erg/cm2
              Error 4.11e-09 5.27e-09 9.29e-09 6.04e-08 2.34e-08 6.84e-08   erg/cm2
Peak flux Power-law 7.30e-01 7.29e-01 5.11e-01 5.67e-01 2.19e+00 2.54e+00   ph/cm2/s
              Error 1.72e-01 1.18e-01 1.00e-01 2.09e-01 3.46e-01 4.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.30e-08 3.82e-08 4.99e-08 2.24e-08 1.18e-07 1.23e-07   erg/cm2
              Error 4.73e-09 7.83e-09 1.20e-08 4.05e-08 2.49e-08 4.39e-08   erg/cm2
Peak flux Cutoff-PL 4.91e-01 9.72e-01 5.59e-01 5.50e-02 2.07e+00 2.08e+00   ph/cm2/s
              Error 2.04e-01 1.79e-01 1.40e-01 8.47e-02 3.49e-01 3.54e-01   ph/cm2/s
 
Fluence        Band 1.21e-08 4.16e-08 4.54e-08 7.76e-08 1.25e-07 1.76e-07   erg/cm2
              Error 4.96e-09 8.57e-09 1.07e-08 -------- 2.39e-08 --------   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    1.421    0.245    -      -           2.46e-02 4.05e-03   65.030 57
CPL  -0.268    1.495      63.5   32.0      1.94e-01 8.14e-01   59.270 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.514    0.233    -      -           1.75e-02 2.85e-03   70.510 57
CPL  -1.381    1.879      53.3    8.3      6.29e-01 4.84e+00   57.020 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: 0.448000 sec.
T50 in the 50-300 keV band: 0.320000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.552   -0.008    0.544
T90     0.492    0.028    0.520
T50     0.244    0.132    0.376
Peak    1.000   -0.230    0.770

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   61.9170 +65.1481 0.0177   31.3   85.3       0.2402    10.9  TRIG_00998907       
------------------------------------------
 
Foreground time interval of the image:
 -0.008   0.544 (delta_t =   0.552 [sec])
Background time interval of the image:
-65.291  -0.008 (delta_t =  65.283 [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    0.544 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42106     ( -0.24449   0.245082 )
Norm@50keV  : 2.46424E-02    ( -0.00405823   0.0040436 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.03 using 59 PHA bins.
# Reduced chi-squared =          1.141 for     57 degrees of freedom 
# Null hypothesis probability =   2.173499e-01
 
Photon flux (15-150 keV)    in 0.552 sec: 3.01567 ( -0.495461  0.496162 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30883e-07 ( -2.32374e-08  2.34938e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.008 sec. to    0.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.267716     ( -1.73895   1.25009 )
Epeak [keV] : 63.4977      ( -13.7056 50.2751 )
Norm@50keV  : 0.194327    ( -0.19433   1.43307 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.570938e-01
 
Photon flux (15-150 keV)    in 0.552 sec: 2.92215 ( -0.50244  0.50335 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.17819e-07 ( -2.42869e-08  2.55962e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.008 sec. to    0.544 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.64013   ( -5.23617   -4.64013 )
beta        : -2.01309    ( -0.561554   0.426136 )
Epeak [keV] : 37.1684      ( -5.75261 6.93776 )
Norm@50keV   : 162.833    ( -25.4727   1193.94 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.70 using 59 PHA bins.
# Reduced chi-squared =          1.049 for     55 degrees of freedom 
# Null hypothesis probability =   3.758017e-01
 
Photon flux (15-150 keV)    in 0.552 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24519e-07 ( -1.24515e-07  -2.37299e-08 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.3914  (-2.21129  2.74104)
R^2/D10^2   : 0.439552  (-0.205471   0.355147)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.00 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     57 degrees of freedom 
# Null hypothesis probability =   3.341490e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.058e-08   3.182e-09
25- 50  4.044e-08   1.105e-08
50-150  5.592e-08   1.806e-08
15-150  1.069e-07   2.539e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-83.9338      -199.362)
Norm        : 12.6004       (-2.02553     2.02835)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.68 using 59 PHA bins.
# Reduced chi-squared =          1.117 for     57 degrees of freedom 
# Null hypothesis probability =   2.532093e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.732e-08   1.002e-08
25- 50  3.332e-08   1.888e-08
50-150  7.307e-08   4.112e-08
15-150  1.237e-07   6.944e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 12.2233        (-8.16644      3.50642)
R1^2/D10^2  : 0.687032        (-0.414989      6.40049)
kT2 [keV]   : 77.5388        (-52.0678      -52.0679)
R2^2/D10^2  : 1.03288E-03    (-0.000565433   0.423694)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.15 using 59 PHA bins.
#Fit statistic : Chi-Squared =          58.12 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Reduced chi-squared =          1.057 for     55 degrees of freedom 
# Null hypothesis probability =   3.602337e-01
# Null hypothesis probability =   3.610320e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.251e-08   7.347e-09
25- 50  4.037e-08   2.352e-08
50-150  7.057e-08   3.447e-08
15-150  1.234e-07   5.980e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.230 sec. to    0.770 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51355     ( -0.230629   0.235087 )
Norm@50keV  : 1.75119E-02    ( -0.0028567   0.00283878 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.51 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     57 degrees of freedom 
# Null hypothesis probability =   1.077316e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.19413 ( -0.345991  0.34636 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.65791e-07 ( -2.88969e-08  2.93348e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.230 sec. to    0.770 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.38088     ( -2.22511   1.53319 )
Epeak [keV] : 53.2839      ( -7.56396 9.00907 )
Norm@50keV  : 0.628881    ( -0.643666   9.03865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.02 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     56 degrees of freedom 
# Null hypothesis probability =   4.368249e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.07318 ( -0.34779  0.35052 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4127e-07 ( -2.6516e-08  2.9406e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.230 sec. to    0.770 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.23687   ( -2.30705   -2.23676 )
beta        : -3.04036    ( 3.04025   0.99998 )
Epeak [keV] : 48.5424      ( -9.27248 16.9567 )
Norm@50keV   : 2.07356    ( -2.07338   46.4981 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.75 using 59 PHA bins.
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   4.096406e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48595e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.5921  (-1.76299  2.08407)
R^2/D10^2   : 0.399539  (-0.163124   0.257814)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.11 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     57 degrees of freedom 
# Null hypothesis probability =   4.710758e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.563e-08   3.975e-09
25- 50  5.641e-08   1.060e-08
50-150  6.756e-08   2.140e-08
15-150  1.396e-07   2.990e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 175.840       (-79.7073      -173.379)
Norm        : 9.16806       (-1.47282     1.66013)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.21 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     57 degrees of freedom 
# Null hypothesis probability =   1.669973e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.318e-08   1.311e-08
25- 50  4.391e-08   2.409e-08
50-150  9.220e-08   5.240e-08
15-150  1.593e-07   8.905e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 198.659        (-198.659      -198.659)
R1^2/D10^2  : 5.32078E-05        (-5.32081e-05      0.635804)
kT2 [keV]   : 13.0759        (-2.17588      2.38013)
R2^2/D10^2  : 0.443889    (-0.139954   3.18685)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.07 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.75 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Reduced chi-squared =          1.032 for     55 degrees of freedom 
# Null hypothesis probability =   3.982219e-01
# Null hypothesis probability =   4.094735e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.600e-08   3.909e-06
25- 50  5.614e-08   3.300e-05
50-150  6.893e-08   7.610e-04
15-150  1.411e-07   7.620e-04
Plot creation:
Tue Oct  6 18:09:02 EDT 2020