batgrbproduct analysis for trigger=956824

batgrbproduct Analysis for Trigger=956824

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 14:45:32 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger956824
======================================================================

  Trigger: 00956824      Segment: 000

  BAT Trigger Time: 603552778.304   [s; MET]
      Trigger Stop: 603552778.816   [s; MET]
               UTC: 2020-02-16T13:32:33.858540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 160.460729941118   Dec: 19.4541045214607  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.23
     Image Trigger?:     NO
     Rate S/N Ratio:     15.1657508881031  [ if not an image trigger ]
     Image S/N Ratio:    8.23

  Flight Position:   [ source = BAT ]
    RA: 160.460729941118   Dec: 19.4541045214607  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 160.454200385875   Dec: 19.4711343785963  [deg; J2000]  
        { 10h 41m 49.0s , +19d 28' 16.1" }
         +/- 0.930348304476157 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.254245413202635 [arcmin] (formal 1-sigma fit error)
    SNR: 33.721774674736
 
  Angular difference between Flight and Ground position is 1.086510 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 67.4479998350143 +/- 6.56804386229279
        Measured from: 0.48800003528595
                   to: 67.9359998703003     [s; relative to TRIGTIME]
     T50: 38.1959999799728 +/- 5.19073182678569
        Measured from: 4.04799997806549
                   to: 42.2439999580383     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.80400002002716     
                   to: 3.80400002002716     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.720000028610229     
                   to: 79.7200000286102     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.964773   1.285195   0.662680   0.083340
           0.052608   0.054789   0.046636   0.039026 [error]
 Peak      0.039480   0.075597   0.064275   0.013460
           0.006655   0.007643   0.006608   0.004939 [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 3.27e-07 4.87e-07 5.40e-07 1.13e-06 1.70e-06 2.49e-06   erg/cm2
              Error 2.70e-08 2.64e-08 4.47e-08 1.89e-07 1.05e-07 2.33e-07   erg/cm2
Peak flux Power-law 4.54e-01 5.00e-01 3.92e-01 5.07e-01 1.54e+00 1.85e+00   ph/cm2/s
              Error 8.45e-02 5.99e-02 5.16e-02 1.32e-01 1.72e-01 2.11e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.83e-07 5.50e-07 5.28e-07 2.32e-07 1.53e-06 1.59e-06   erg/cm2
              Error 3.19e-08 3.60e-08 5.37e-08 1.32e-07 1.16e-07 1.74e-07   erg/cm2
Peak flux Cutoff-PL 3.63e-01 5.61e-01 4.38e-01 1.71e-01 1.48e+00 1.53e+00   ph/cm2/s
              Error 1.02e-01 7.63e-02 6.37e-02 1.26e-01 1.76e-01 2.11e-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    1.850    0.097    -      -           2.29e-03 1.40e-04    0.000  0
CPL   0.658    0.498      49.7    6.1      1.03e-02 7.15e-03    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.350    0.174    -      -           1.27e-02 1.41e-03    0.000  0
CPL   0.118    0.908      77.7   34.9      5.26e-02 6.89e-02    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: 9.152000 sec.
T50 in the 50-300 keV band: 4.032000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   80.440   -0.720   79.720
T90    67.448    0.488   67.936
T50    38.196    4.048   42.244
Peak    1.000    2.804    3.804

Click here for the BAT GCN circular template

Special notes of this burst

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
  160.4542    19.4711   0.0057    23.2705    30.0367         1.5265929     33.722 TRIG_00956824                 
 
Foreground time interval of the image:
 -0.720   9.997 (delta_t =  10.717 [sec])
Background time interval of the image:
-239.304  -0.720 (delta_t = 238.584 [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 0.512000

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 0.512000

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 0.512000

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   -0.720 sec. to   79.720 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85002     ( -0.0957537   0.0975652 )
Norm@50keV  : 2.29378E-03    ( -0.000141019   0.000139955 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 80.44 sec: 0.322436 ( -0.017733  0.017748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69681e-06 ( -1.04447e-07  1.05345e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.720 sec. to   79.720 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.657683     ( -0.52667   0.469126 )
Epeak [keV] : 49.7219      ( -5.03991 7.23416 )
Norm@50keV  : 1.03498E-02    ( -0.0045772   0.009729 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 80.44 sec: 0.305269 ( -0.01873  0.018764 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.52733e-06 ( -1.14201e-07  1.18071e-07 ) ergs/cm2

Band function

Time interval is from   -0.720 sec. to   79.720 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]    : 11.5129  (-0.68107  0.726313)
R^2/D10^2   : 9.04981E-02  (-0.0187354   0.0234801)
(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  2.032e-07   1.882e-08
25- 50  6.083e-07   3.543e-08
50-150  4.711e-07   5.820e-08
15-150  1.283e-06   7.722e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 85.7331       (-14.2441      19.2418)
Norm        : 1.48866       (-0.118076     0.130507)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.119e-07   2.570e-08
25- 50  5.218e-07   3.077e-08
50-150  7.708e-07   2.215e-07
15-150  1.604e-06   2.172e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.28091        (-1.59014      1.74468)
R1^2/D10^2  : 0.464367        (-0.235494      0.731152)
kT2 [keV]   : 17.0212        (-2.75665      5.1341)
R2^2/D10^2  : 1.51114E-02    (-0.0106075   0.0187398)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.802e-07   8.181e-08
25- 50  5.469e-07   1.550e-07
50-150  6.824e-07   3.076e-07
15-150  1.509e-06   4.914e-07

Peak spectrum fit

Power-law model

Time interval is from    2.804 sec. to    3.804 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34952     ( -0.1736   0.173759 )
Norm@50keV  : 1.27463E-02    ( -0.00141608   0.00141378 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.53543 ( -0.17182  0.17201 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24517e-07 ( -1.51642e-08  1.52743e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.804 sec. to    3.804 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.118322     ( -0.997352   0.818952 )
Epeak [keV] : 77.7184      ( -15.6731 54.1886 )
Norm@50keV  : 5.26209E-02    ( -0.0316642   0.106226 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.48452 ( -0.17624  0.17597 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16356e-07 ( -1.5973e-08  1.62735e-08 ) ergs/cm2

Band function

Time interval is from    2.804 sec. to    3.804 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]    : 16.2938  (-1.84501  2.12564)
R^2/D10^2   : 0.144129  (-0.0502884   0.074355)
(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  7.879e-09   1.602e-09
25- 50  3.367e-08   4.840e-09
50-150  6.290e-08   1.239e-08
15-150  1.044e-07   1.546e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-44.4686      -200)
Norm        : 6.38536       (-0.703592     0.703592)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.590e-08   4.148e-09
25- 50  3.059e-08   1.679e-08
50-150  6.710e-08   3.670e-08
15-150  1.136e-07   6.225e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.11059        (-4.1545      -7.11059)
R1^2/D10^2  : 0.888805        (-0.700638      23.8924)
kT2 [keV]   : 20.7231        (-4.33937      -20.7231)
R2^2/D10^2  : 5.22610E-02    (-0.0521788   0.0802974)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.160e-08   6.540e-09
25- 50  3.209e-08   1.684e-08
50-150  7.130e-08   4.063e-08
15-150  1.150e-07   5.975e-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: 1.55541     ( -0.0795217   0.0799888 )
Norm@50keV  : 9.21970E-03    ( -0.000445932   0.000444941 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 10.72 sec: 1.16900 ( -0.0565321  0.0565945 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.29733e-07 ( -4.83407e-08  4.85425e-08 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.556988     ( -0.425512   0.3871 )
Epeak [keV] : 70.4897      ( -8.55985 15.6025 )
Norm@50keV  : 2.99160E-02    ( -0.0107914   0.0191437 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 10.72 sec: 1.11801 ( -0.05958  0.05961 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.62692e-07 ( -5.42078e-08  5.46291e-08 ) 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)  = 4.87e-07
S(50-100 keV) = 5.40e-07

T90 vs. Hardness ratio plot

T90                                   = 67.4479998350143 sec.
Hardness ratio (energy fluence ratio) = 1.10883

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.33212
Count Ratio (50-100 keV) / (15-25 keV) = 0.686877

Mask shadow pattern

IMX = 3.723024656157209E-01, IMY = -2.152670034882408E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-239.304000 -0.720000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
172.3103  -3.3751    2.8  41.2   66.1   3.2075   4.1 ------	UNKNOWN                       
102.8085 -27.5856    3.1  55.1  166.0   4.1888   3.7 ------	UNKNOWN                       
196.6976  39.7878    2.7  56.8    2.9   4.6451   4.3 ------	UNKNOWN                       
194.1945  43.3825    3.5  55.3   -1.7   2.1625   3.3 ------	UNKNOWN                       
143.2830  31.8411    2.5  16.1  -27.7   0.9107   4.7 ------	UNKNOWN                       
190.6426  62.5505    2.5  58.9  -24.3   6.2110   4.7 ------	UNKNOWN                       
157.0323  65.7721    4.7  50.6  -39.4   1.9451   2.4 ------	UNKNOWN

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

Time interval of the image:
-0.720000 9.996600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
160.4542  19.4711    0.3  23.3   30.0   1.5266  33.7 ------	UNKNOWN                       
111.5115  -4.3653    2.3  32.4 -179.7   0.2457   5.0 ------	UNKNOWN                       
115.1748  46.6379    2.1  34.2  -76.1   0.4114   5.5 ------	UNKNOWN                       
185.6749  64.5646    2.1  57.9  -27.6   1.4022   5.4 ------	UNKNOWN                       
 83.1119  12.7755    2.7  51.2 -137.5   0.9302   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
101.196630 962.795000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
127.1779   6.2230    3.3  34.9  104.8   4.0099   3.5 ------	UNKNOWN                       
109.8720  44.3805    3.0  48.6  165.2   7.9143   3.9 ------	UNKNOWN                       
207.6703  -0.9165    2.9  50.6  -39.3   9.2899   3.9 ------	UNKNOWN                       
191.0680  62.5596    2.2  48.0 -129.1  13.2917   5.2 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:29:21 EDT 2020