batgrbproduct analysis for trigger=946476

batgrbproduct Analysis for Trigger=946476

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.47
    Process Start Time (local time): Mon May 18 15:10:11 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger946476
======================================================================

  Trigger: 00946476      Segment: 000

  BAT Trigger Time: 599184104   [s; MET]
      Trigger Stop: 599184176   [s; MET]
               UTC: 2019-12-28T00:01:19.837560    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 5.3392435854354   Dec: -8.67033493468903  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.82
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.82

  Flight Position:   [ source = BAT ]
    RA: 5.3392435854354   Dec: -8.67033493468903  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 5.36285866931138   Dec: -8.67732460528768  [deg; J2000]  
        { 00h 21m 27.1s , -08d 40' 38.4" }
         +/- 1.39565357880773 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.649113647308929 [arcmin] (formal 1-sigma fit error)
    SNR: 18.8926634927409
 
  Angular difference between Flight and Ground position is 1.462135 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 193.815999984741 +/- 29.8751412512363
        Measured from: -31.9639999866486
                   to: 161.851999998093     [s; relative to TRIGTIME]
     T50: 116.37199985981 +/- 13.0497353837348
        Measured from: 1.51600003242493
                   to: 117.887999892235     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 54.5920000076294     
                   to: 55.5920000076294     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -39.3480000495911     
                   to: 191.284000039101     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.756200   1.743578   0.930778   0.088128
           0.100414   0.103984   0.091824   0.085409 [error]
 Peak      0.024668   0.032610   0.017262   0.005691
           0.006902   0.007102   0.006243   0.005646 [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 5.21e-07 6.96e-07 6.83e-07 1.20e-06 2.29e-06 3.11e-06   erg/cm2
              Error 5.46e-08 4.85e-08 8.71e-08 3.09e-07 1.94e-07 3.98e-07   erg/cm2
Peak flux Power-law 2.68e-01 2.09e-01 1.10e-01 8.34e-02 6.25e-01 6.70e-01   ph/cm2/s
              Error 9.48e-02 5.35e-02 4.86e-02 7.16e-02 1.58e-01 1.76e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.07e-07 7.15e-07 6.76e-07 7.63e-07 2.23e-06 3.11e-06   erg/cm2
              Error 6.02e-08 6.17e-08 9.29e-08 6.77e-07 2.29e-07 6.21e-07   erg/cm2
Peak flux Cutoff-PL 2.54e-01 2.22e-01 1.11e-01 4.42e-02 6.16e-01 6.32e-01   ph/cm2/s
              Error 1.06e-01 -------- 5.33e-02 5.13e-02 1.61e-01 --------   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   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    2.027    0.144    -      -           1.08e-03 9.71e-05    0.000  0
CPL   1.784    0.462      37.7   -2.5      1.48e-03 1.17e-03    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.930    0.506    -      -           4.30e-03 1.45e-03    0.000  0
CPL   1.430    1.721      49.9    0.0      8.23e-03 0.00e+00    0.000  0
 
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: 165.632000 sec.
T50 in the 50-300 keV band: 94.528000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  230.632  -39.348  191.284
T90   193.816  -31.964  161.852
T50   116.372    1.516  117.888
Peak    1.000   54.592   55.592

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
    5.3629    -8.6773   0.0102    11.3235    76.6261         3.1448828     18.893 TRIG_00946476                 
 
Foreground time interval of the image:
-39.348  81.501 (delta_t = 120.849 [sec])
Background time interval of the image:
-239.000 -39.348 (delta_t = 199.652 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from  -39.348 sec. to  191.284 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.02682     ( -0.140997   0.146305 )
Norm@50keV  : 1.07745E-03    ( -9.79231e-05   9.62159e-05 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 230.6 sec: 0.163655 ( -0.011443  0.011455 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29525e-06 ( -1.9186e-07  1.95498e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -39.348 sec. to  191.284 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78432     ( -0.595415   0.327625 )
Epeak [keV] : 37.6667      ( -32.6442 -37.6666 )
Norm@50keV  : 1.47876E-03    ( -0.000633115   0.00170776 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 230.6 sec: 0.161468 ( -0.012368  0.006193 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.23064e-06 ( -2.31979e-07  2.25196e-07 ) ergs/cm2

Band function

Time interval is from  -39.348 sec. to  191.284 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.88581  (-0.857085  0.949998)
R^2/D10^2   : 7.57513E-02  (-0.0225552   0.0318794)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.463e-07   4.220e-08
25- 50  8.470e-07   7.425e-08
50-150  4.276e-07   8.624e-08
15-150  1.621e-06   1.339e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 65.3694       (-13.7559      19.5548)
Norm        : 0.813144       (-0.0957559     0.1058)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.772e-07   4.796e-08
25- 50  7.450e-07   5.200e-08
50-150  9.082e-07   1.746e-07
15-150  2.130e-06   1.966e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.13237        (-1.31061      1.3787)
R1^2/D10^2  : 0.668586        (-0.388601      1.63427)
kT2 [keV]   : 17.8170        (-3.71528      6.13976)
R2^2/D10^2  : 6.00318E-03    (-0.00413936   0.00553987)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.041e-07   1.829e-07
25- 50  6.946e-07   1.766e-07
50-150  9.443e-07   3.881e-07
15-150  2.143e-06   6.375e-07

Peak spectrum fit

Power-law model

Time interval is from   54.592 sec. to   55.592 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93019     ( -0.461585   0.550931 )
Norm@50keV  : 4.29825E-03    ( -0.00150003   0.00139847 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.624944 ( -0.158371  0.158384 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.95412e-08 ( -1.25613e-08  1.32887e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   54.592 sec. to   55.592 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42993     ( -2.69589   0.746774 )
Epeak [keV] : 49.9023      (   )
Norm@50keV  : 8.23236E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.615942 ( -0.1614  0.161513 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.79857e-08 ( -1.27398e-08  1.22613e-08 ) ergs/cm2

Band function

Time interval is from   54.592 sec. to   55.592 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.7391  (-2.82027  3.97187)
R^2/D10^2   : 0.228358  (-0.157837   0.477481)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.474e-09   3.046e-09
25- 50  1.500e-08   7.396e-09
50-150  9.592e-09   6.321e-09
15-150  3.007e-08   1.728e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 77.1454       (-41.9597      -77.1454)
Norm        : 2.98576       (-0.891993     1.51512)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.728e-09   3.915e-09
25- 50  1.261e-08   7.002e-09
50-150  1.736e-08   1.443e-08
15-150  3.770e-08   2.481e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.25358        (-1.02806      2.71811)
R1^2/D10^2  : 3.54003E+04        (-31596.9      3.4333e+09)
kT2 [keV]   : 12.4151        (-3.40888      5.25264)
R2^2/D10^2  : 0.124479    (-0.092387   0.167086)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.126e-09   3.056e-09
25- 50  1.331e-08   8.045e-09
50-150  1.261e-08   8.880e-09
15-150  3.205e-08   1.815e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.06305     ( -0.15489   0.161831 )
Norm@50keV  : 1.36230E-03    ( -0.000139093   0.000136363 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 120.8 sec: 0.210499 ( -0.0159023  0.0159124 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.52399e-06 ( -1.40261e-07  1.43191e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87690     ( -0.627123   0.358644 )
Epeak [keV] : 27.6443      (   )
Norm@50keV  : 1.74159E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 120.8 sec: 0.208376 ( -0.017033  0.017015 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49109e-06 ( -1.68202e-07  1.67658e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 6.96e-07
S(50-100 keV) = 6.83e-07

T90 vs. Hardness ratio plot

T90                                   = 193.815999984741 sec.
Hardness ratio (energy fluence ratio) = 0.981322

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.992813
Count Ratio (50-100 keV) / (15-25 keV) = 0.529995

Mask shadow pattern

IMX = 4.631772827169977E-02, IMY = -1.948152686115756E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 72.000000

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-239.000000 -39.348000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 37.5272 -39.0809    2.6  43.4  152.7   2.5461   4.4 ------	UNKNOWN                       
 29.5720 -52.4776    2.2  45.7  173.1   2.5731   5.2 ------	UNKNOWN                       
310.9222   0.8358    3.1  47.3  -53.1   3.5263   3.7 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-39.348000 81.500590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
  5.3629  -8.6773    0.6  11.3   76.6   3.1451  18.9 ------	UNKNOWN                       
310.0226  13.5233    2.5  53.8  -38.8   4.3886   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
112.900590 963.085500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 39.8878  -2.4285    4.2  35.0  104.9   7.8131   2.8 ------	UNKNOWN                       
 26.2493 -12.5137    2.8  20.9  125.5   6.4969   4.2 ------	UNKNOWN                       
 36.6189 -35.8499    2.3  39.4  161.5  11.0137   5.0 ------	UNKNOWN                       
359.3827 -52.7586    3.3  44.4 -151.8   8.7957   3.5 ------	UNKNOWN                       
331.8666 -24.5736    2.8  35.6  -97.5  12.5643   4.1 ------	UNKNOWN                       
333.6903 -48.6155    2.8  48.0 -129.1  24.4564   4.1 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:45:03 EDT 2020