batgrbproduct analysis for trigger=895006

batgrbproduct Analysis for Trigger=895006

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Mar 27 16:59:55 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger895006/GCN5_download_cron
======================================================================

  Trigger: 00895006      Segment: 000

  BAT Trigger Time: 575278551.544   [s; MET]
      Trigger Stop: 575278551.576   [s; MET]
               UTC: 2019-03-26T07:35:28.910940    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 341.652491920313   Dec: 39.9026483879093  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.57
     Image Trigger?:     NO
     Rate S/N Ratio:     44.8330235429198  [ if not an image trigger ]
     Image S/N Ratio:    10.57

  Flight Position:   [ source = BAT ]
    RA: 341.652491920313   Dec: 39.9026483879093  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 341.65232112937   Dec: 39.9139746169642  [deg; J2000]  
        { 22h 46m 36.6s , +39d 54' 50.3" }
         +/- 1.56187306291838 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.588479530824784 [arcmin] (formal 1-sigma fit error)
    SNR: 16.0872427769131
 
  Angular difference between Flight and Ground position is 0.679619 arcmin
 
  Partial Coding Fraction: 0.578125    [ including projection effects ]

  Duration
     T90: 0.0759999752044678 +/- 0.0322489854521138
        Measured from: 1.19209289550781e-07
                   to: 0.0760000944137573     [s; relative to TRIGTIME]
     T50: 0.0279998779296875 +/- 0.00894431669225064
        Measured from: 0.00800013542175293
                   to: 0.0360000133514404     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.445999979972839     
                   to: 0.554000020027161     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.103999972343445     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.056003   0.068018   0.040191   0.007765
           0.006425   0.007049   0.005885   0.004059 [error]
 Peak      0.053406   0.075049   0.046614  -0.002167
           0.011336   0.011816   0.010717   0.009133 [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 1.85e-08 1.05e-08 3.80e-09 1.80e-09 3.38e-08 3.47e-08   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 6.60e-01 5.42e-01 3.02e-01 2.48e-01 1.61e+00 1.75e+00   ph/cm2/s
              Error 1.68e-01 9.96e-02 8.10e-02 1.24e-01 2.97e-01 3.26e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.72e-08 3.13e-08 1.36e-08 7.31e-10 6.28e-08 6.28e-08   erg/cm2
              Error 3.73e-09 4.56e-09 3.85e-09 5.40e-10 8.20e-09 8.21e-09   erg/cm2
Peak flux Cutoff-PL 5.44e-01 6.81e-01 2.92e-01 3.06e-02 1.55e+00 1.55e+00   ph/cm2/s
              Error 1.93e-01 1.42e-01 1.10e-01 6.38e-02 2.97e-01 3.00e-01   ph/cm2/s
 
Fluence        Band 1.70e-08 3.12e-08 1.35e-08 7.57e-10 6.26e-08 6.27e-08   erg/cm2
              Error 3.69e-09 -------- 3.83e-09 5.33e-10 8.15e-09 8.21e-09   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    3.472    0.000    -      -           2.10e-02 0.00e+00  167.120 57
CPL  -0.666    0.924      33.9    4.9      4.66e+00 8.64e+00   97.470 56
 
The chi2 of BB fit is 99.89 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    1.844    0.296    -      -           1.15e-02 2.44e-03   69.740 57
CPL  -0.208    1.717      44.7   13.4      1.76e-01 1.29e+00   63.110 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: 0.128000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.104    0.000    0.104
T90     0.076    0.000    0.076
T50     0.028    0.008    0.036
Peak    1.000   -0.446    0.554

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  341.6523 +39.9140 0.0120   39.6  -14.6       0.1786    16.1  TRIG_00895006       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.104 (delta_t =   0.104 [sec])
Background time interval of the image:
-239.544   0.000 (delta_t = 239.544 [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    0.000 sec. to    0.104 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.47169     (     )
Norm@50keV  : 2.10326E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         167.12 using 59 PHA bins.
# Reduced chi-squared =         2.9319 for     57 degrees of freedom 
# Null hypothesis probability =   9.469968e-13
 
Photon flux (15-150 keV)    in 0.104 sec: 8.31619 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.38217e-08 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.665997     ( -1.00838   0.838884 )
Epeak [keV] : 33.8598      ( -5.24384 4.46041 )
Norm@50keV  : 4.66285    ( -4.66173   12.6268 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.47 using 59 PHA bins.
# Reduced chi-squared =          1.741 for     56 degrees of freedom 
# Null hypothesis probability =   5.007513e-04
 
Photon flux (15-150 keV)    in 0.104 sec: 12.0296 ( -1.5746  1.5718 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.27873e-08 ( -8.19998e-09  8.20498e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.104 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.688644   ( -0.856025   0.998726 )
beta        : -8.74164    ( 8.65837   2.58732 )
Epeak [keV] : 33.9046      ( -4.80646 4.43672 )
Norm@50keV   : 4.80183    ( -4.80416   12.8205 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.42 using 59 PHA bins.
# Reduced chi-squared =          1.771 for     55 degrees of freedom 
# Null hypothesis probability =   3.709865e-04
 
Photon flux (15-150 keV)    in 0.104 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26485e-08 ( -6.26477e-08  -8.16972e-09 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.38793  (-1.1395  1.03458)
R^2/D10^2   : 8.01489  (-2.83072   5.37939)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          99.89 using 59 PHA bins.
# Reduced chi-squared =          1.753 for     57 degrees of freedom 
# Null hypothesis probability =   3.857999e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.460e-08   2.995e-09
25- 50  3.310e-08   5.476e-09
50-150  1.434e-08   4.409e-09
15-150  6.204e-08   1.018e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 26.0022       (      )
Norm        : 110.079       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         115.26 using 59 PHA bins.
# Reduced chi-squared =         2.0221 for     57 degrees of freedom 
# Null hypothesis probability =   7.955351e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.149e-08   3.177e-09
25- 50  2.259e-08   3.167e-09
50-150  1.017e-08   2.747e-09
15-150  5.425e-08   7.644e-09
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.31856        (-1.83724      2.37819)
R1^2/D10^2  : 58.3185        (-49.2599      569.321)
kT2 [keV]   : 10.5140        (-1.28752      1.17564)
R2^2/D10^2  : 4.21035    (-2.17689   3.45332)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          95.01 using 59 PHA bins.
# Reduced chi-squared =          1.727 for     55 degrees of freedom 
# Null hypothesis probability =   6.546224e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.791e-08   9.236e-09
25- 50  3.020e-08   1.508e-08
50-150  1.613e-08   8.439e-09
15-150  6.424e-08   3.335e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.446 sec. to    0.554 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84379     ( -0.286951   0.305613 )
Norm@50keV  : 1.15099E-02    ( -0.00246483   0.0024182 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.74 using 59 PHA bins.
# Reduced chi-squared =          1.224 for     57 degrees of freedom 
# Null hypothesis probability =   1.197757e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.61381 ( -0.296932  0.297144 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05815e-07 ( -2.23021e-08  2.29687e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.446 sec. to    0.554 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.207751     ( -1.99249   1.44241 )
Epeak [keV] : 44.7320      ( -9.29018 17.4222 )
Norm@50keV  : 0.175985    ( -0.176109   2.40187 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.11 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     56 degrees of freedom 
# Null hypothesis probability =   2.395557e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.54509 ( -0.29542  0.2977 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.17793e-08 ( -2.03662e-08  2.32787e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.446 sec. to    0.554 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.98649   ( -6.07707   -4.98649 )
beta        : -2.37161    ( -0.769846   0.466403 )
Epeak [keV] : 28.6472      ( -5.77256 5.37938 )
Norm@50keV   : 777.046    ( -136.795   2486.68 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.63 using 59 PHA bins.
# Reduced chi-squared =          1.139 for     55 degrees of freedom 
# Null hypothesis probability =   2.239555e-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]    : 11.0672  (-1.94542  2.33069)
R^2/D10^2   : 0.562452  (-0.290003   0.597925)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.56 using 59 PHA bins.
# Reduced chi-squared =          1.133 for     57 degrees of freedom 
# Null hypothesis probability =   2.293225e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.441e-08   4.636e-09
25- 50  4.107e-08   1.165e-08
50-150  2.855e-08   1.155e-08
15-150  8.403e-08   2.297e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 78.3022       (-31.1158      76.1846)
Norm        : 7.85351       (-1.81274     2.31665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.10 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     57 degrees of freedom 
# Null hypothesis probability =   1.913815e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.035e-08   5.635e-09
25- 50  3.332e-08   9.930e-09
50-150  4.636e-08   3.311e-08
15-150  1.000e-07   3.493e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.86597        (-5.86017      -5.86017)
R1^2/D10^2  : 2.43967        (-2.44761      -2.44761)
kT2 [keV]   : 14.1773        (-14.1692      -14.1692)
R2^2/D10^2  : 0.170842    (-0.171352   0.642921)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.57 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     55 degrees of freedom 
# Null hypothesis probability =   2.253896e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.803e-08   1.015e-08
25- 50  3.752e-08   2.005e-08
50-150  3.719e-08   2.182e-08
15-150  9.275e-08   4.764e-08
Plot creation:
Wed Mar 27 17:06:08 EDT 2019