batgrbproduct analysis for trigger=848048

batgrbproduct Analysis for Trigger=848048

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jul 16 17:34:29 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger848048/GCN5_download_cron
======================================================================

  Trigger: 00848048      Segment: 000

  BAT Trigger Time: 553370846.272   [s; MET]
      Trigger Stop: 553370846.784   [s; MET]
               UTC: 2018-07-15T18:07:05.003060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 235.068817047237   Dec: -0.924663860513124  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.6
     Image Trigger?:     NO
     Rate S/N Ratio:     39.1918358845308  [ if not an image trigger ]
     Image S/N Ratio:    7.6

  Flight Position:   [ source = BAT ]
    RA: 235.068817047237   Dec: -0.924663860513124  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 235.085397697848   Dec: -0.899307110107108  [deg; J2000]  
        { 15h 40m 20.5s , -00d 53' 57.5" }
         +/- 2.00179119822337 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.723649466774787 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2854824437598
 
  Angular difference between Flight and Ground position is 1.817726 arcmin
 
  Partial Coding Fraction: 0.8515625    [ including projection effects ]

  Duration
     T90: 0.684000015258789 +/- 0.0877268988477141
        Measured from: -0.111999869346619
                   to: 0.57200014591217     [s; relative to TRIGTIME]
     T50: 0.407999873161316 +/- 0.0863712781664672
        Measured from: 0.0480002164840698
                   to: 0.456000089645386     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.253999948501587     
                   to: 0.746000051498413     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.143999934196472     
                   to: 0.632000088691711     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.024908   0.045796   0.067803   0.023057
           0.006747   0.007331   0.007436   0.007025 [error]
 Peak      0.024834   0.036533   0.071980   0.019659
           0.007531   0.008104   0.008026   0.007543 [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 6.60e-09 1.94e-08 4.66e-08 3.09e-07 1.26e-07 3.81e-07   erg/cm2
              Error 2.15e-09 3.69e-09 6.79e-09 1.14e-07 1.89e-08 1.16e-07   erg/cm2
Peak flux Power-law 1.91e-01 3.17e-01 3.98e-01 9.95e-01 1.19e+00 1.90e+00   ph/cm2/s
              Error 7.24e-02 7.22e-02 6.09e-02 3.56e-01 1.87e-01 3.57e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.28e-09 1.95e-08 4.74e-08 2.59e-07 1.26e-07 3.33e-07   erg/cm2
              Error 2.69e-09 3.81e-09 8.23e-09 1.73e-07 1.46e-08 1.59e-07   erg/cm2
Peak flux Cutoff-PL 1.53e-01 3.11e-01 4.25e-01 6.43e-01 1.15e+00 1.53e+00   ph/cm2/s
              Error 1.30e-01 8.29e-02 8.59e-02 4.88e-01 2.03e-01 5.20e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.72e-01 3.16e-01 4.13e-01 7.59e-01 1.17e+00 1.66e+00   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    0.737    0.266    -      -           1.35e-02 1.99e-03   46.060 57
CPL   0.590    0.810     613.2    0.0      1.55e-02 1.55e-02   45.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.671    0.293    -      -           1.02e-02 1.72e-03   53.370 57
CPL   0.095    1.321     221.8    0.0      1.66e-02 2.18e-02   52.830 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: 0.704000 sec.
T50 in the 50-300 keV band: 0.384000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.776   -0.144    0.632
T90     0.684   -0.112    0.572
T50     0.408    0.048    0.456
Peak    1.000   -0.254    0.746

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  235.0854  -0.8993 0.0170   24.7  170.9       0.1698    11.3  TRIG_00848048       
------------------------------------------
 
Foreground time interval of the image:
 -0.144   0.632 (delta_t =   0.776 [sec])
Background time interval of the image:
-239.272  -0.144 (delta_t = 239.128 [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   -0.144 sec. to    0.632 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.737012     ( -0.27346   0.258865 )
Norm@50keV  : 1.35290E-02    ( -0.00201212   0.00197039 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.06 using 59 PHA bins.
# Reduced chi-squared =         0.8080 for     57 degrees of freedom 
# Null hypothesis probability =   8.498081e-01
 
Photon flux (15-150 keV)    in 0.776 sec: 1.55972 ( -0.220343  0.221508 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26054e-07 ( -1.88072e-08  1.89401e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.144 sec. to    0.632 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.589758     ( -1.23499   0.384312 )
Epeak [keV] : 613.190      ( -612.66 -612.66 )
Norm@50keV  : 1.54547E-02    ( -0.00339893   0.0276462 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.99 using 59 PHA bins.
# Reduced chi-squared =         0.8213 for     56 degrees of freedom 
# Null hypothesis probability =   8.275524e-01
 
Photon flux (15-150 keV)    in 0.776 sec: 1.54910 ( -0.23269  0.17216 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25572e-07 ( -1.94768e-08  9.79622e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.144 sec. to    0.632 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.993797   ( 0.993797   0.993797 )
beta        : -0.737012    ( -0.258789   0.27346 )
Epeak [keV] : 15.8767      ( -15.8767 -15.8767 )
Norm@50keV   : 1.84698E-02    ( -0.0068759   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.06 using 59 PHA bins.
# Reduced chi-squared =         0.8374 for     55 degrees of freedom 
# Null hypothesis probability =   7.994041e-01
 
Photon flux (15-150 keV)    in 0.776 sec: 1.56321 1.55041 (    ) 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]    : 28.6971  (-5.27671  7.46338)
R^2/D10^2   : 2.68017E-02  (-0.0126577   0.0214519)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.08 using 59 PHA bins.
# Reduced chi-squared =         0.8961 for     57 degrees of freedom 
# Null hypothesis probability =   6.957193e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.753e-09   8.257e-10
25- 50  1.666e-08   4.765e-09
50-150  9.851e-08   2.669e-08
15-150  1.179e-07   2.891e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-29.7485      -200)
Norm        : 6.06821       (-0.91478     0.91478)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.20 using 59 PHA bins.
# Reduced chi-squared =          1.267 for     57 degrees of freedom 
# Null hypothesis probability =   8.460694e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.172e-08   6.732e-09
25- 50  2.255e-08   1.267e-08
50-150  4.945e-08   2.800e-08
15-150  8.371e-08   4.765e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.01234        (-2.62864      5.65668)
R1^2/D10^2  : 2.97154        (-2.77339      120.296)
kT2 [keV]   : 34.0117        (-7.61493      16.3532)
R2^2/D10^2  : 1.58202E-02    (-0.0104516   0.0184585)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.04 using 59 PHA bins.
# Reduced chi-squared =         0.8008 for     55 degrees of freedom 
# Null hypothesis probability =   8.551201e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.714e-09   4.156e-09
25- 50  1.699e-08   6.397e-09
50-150  1.023e-07   4.311e-08
15-150  1.270e-07   5.431e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.254 sec. to    0.746 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.671372     ( -0.303242   0.283664 )
Norm@50keV  : 1.02273E-02    ( -0.00174834   0.00169763 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.37 using 59 PHA bins.
# Reduced chi-squared =         0.9364 for     57 degrees of freedom 
# Null hypothesis probability =   6.118686e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.18505 ( -0.186427  0.187634 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26475e-07 ( -2.02788e-08  2.03947e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.254 sec. to    0.746 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 9.50473E-02     ( -1.93679   0.704466 )
Epeak [keV] : 221.782      ( -220.965 -220.965 )
Norm@50keV  : 1.66272E-02    ( -0.00785638   0.0356695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.83 using 59 PHA bins.
# Reduced chi-squared =         0.9433 for     56 degrees of freedom 
# Null hypothesis probability =   5.957512e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.15202 ( -0.204961  0.20157 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24884e-07 ( -2.132e-08  2.0976e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.254 sec. to    0.746 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.04808   ( 1.04808   1.04808 )
beta        : -0.671373    ( -0.283665   0.303082 )
Epeak [keV] : 16.7251      ( -16.7251 -16.7251 )
Norm@50keV   : 1.35263E-02    ( -0.00493326   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.37 using 59 PHA bins.
# Reduced chi-squared =         0.9704 for     55 degrees of freedom 
# Null hypothesis probability =   5.369468e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.16861 1.16183 (    ) 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]    : 29.7094  (-5.63146  8.27255)
R^2/D10^2   : 1.89292E-02  (-0.00929199   0.0158027)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.24 using 59 PHA bins.
# Reduced chi-squared =         0.9517 for     57 degrees of freedom 
# Null hypothesis probability =   5.790945e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.630e-09   9.855e-10
25- 50  1.616e-08   4.861e-09
50-150  1.011e-07   2.861e-08
15-150  1.199e-07   2.881e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-32.5681      -200)
Norm        : 4.62985       (-0.783072     0.783072)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.83 using 59 PHA bins.
# Reduced chi-squared =          1.383 for     57 degrees of freedom 
# Null hypothesis probability =   2.932344e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.152e-08   6.750e-09
25- 50  2.217e-08   1.251e-08
50-150  4.861e-08   2.751e-08
15-150  8.230e-08   4.717e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.45656        (-2.65093      4.75101)
R1^2/D10^2  : 11.5551        (-11.4495      5.98365)
kT2 [keV]   : 32.3815        (-6.67589      10.9728)
R2^2/D10^2  : 1.44811E-02    (-0.00788549   0.0135881)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.62 using 59 PHA bins.
# Reduced chi-squared =         0.9022 for     55 degrees of freedom 
# Null hypothesis probability =   6.796081e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.209e-09   3.622e-09
25- 50  1.554e-08   5.963e-09
50-150  1.030e-07   4.037e-08
15-150  1.258e-07   4.671e-08
Plot creation:
Mon Jul 16 17:39:24 EDT 2018