batgrbproduct analysis for trigger=967774

batgrbproduct Analysis for Trigger=967774

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 14:16:08 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger967774
======================================================================

  Trigger: 00967774      Segment: 000

  BAT Trigger Time: 609466606.592   [s; MET]
      Trigger Stop: 609466610.688   [s; MET]
               UTC: 2020-04-25T00:16:21.762420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 85.2407720384269   Dec: -13.4588771838186  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.62
     Image Trigger?:     NO
     Rate S/N Ratio:     13.490737563232  [ if not an image trigger ]
     Image S/N Ratio:    8.62

  Flight Position:   [ source = BAT ]
    RA: 85.2407720384269   Dec: -13.4588771838186  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 85.2173769200413   Dec: -13.3994730425819  [deg; J2000]  
        { 05h 40m 52.2s , -13d 23' 58.1" }
         +/- 1.95064636822535 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.987794856144153 [arcmin] (formal 1-sigma fit error)
    SNR: 11.7105583823982
 
  Angular difference between Flight and Ground position is 3.816803 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 81 +/- 21.6621790224345
        Measured from: -41.5920000076294
                   to: 39.4079999923706     [s; relative to TRIGTIME]
     T50: 28 +/- 10.1980390271856
        Measured from: -23.5920000076294
                   to: 4.40799999237061     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.40799999237061     
                   to: 3.40799999237061     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -47.5920000076294     
                   to: 58.4079999923706     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.526994   0.624328   0.581243   0.131340
           0.069188   0.072306   0.063782   0.058385 [error]
 Peak      0.020831   0.035056   0.025643   0.005298
           0.007064   0.007723   0.006551   0.005949 [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 1.31e-07 2.71e-07 4.41e-07 1.61e-06 1.22e-06 2.45e-06   erg/cm2
              Error 2.77e-08 3.30e-08 6.34e-08 5.35e-07 1.56e-07 5.75e-07   erg/cm2
Peak flux Power-law 1.91e-01 2.24e-01 1.89e-01 2.71e-01 7.01e-01 8.75e-01   ph/cm2/s
              Error 7.88e-02 5.84e-02 5.18e-02 1.54e-01 1.65e-01 2.16e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.31e-07 2.72e-07 4.41e-07 1.84e-06 1.23e-06 2.41e-06   erg/cm2
              Error 2.77e-08 3.30e-08 -------- -------- 1.56e-07 6.27e-07   erg/cm2
Peak flux Cutoff-PL 1.48e-01 2.50e-01 2.07e-01 7.90e-02 6.62e-01 6.84e-01   ph/cm2/s
              Error 9.79e-02 7.41e-02 6.24e-02 1.59e-01 1.77e-01 2.52e-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    1.301    0.212    -      -           1.17e-03 1.29e-04    0.000  0
CPL   1.298    0.214    10000.0    0.0      1.17e-03 1.29e-04    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.243    0.390    -      -           5.93e-03 1.38e-03    0.000  0
CPL  -0.105    1.767      78.6  -26.3      2.77e-02 4.13e-01    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: 43.328000 sec.
T50 in the 50-300 keV band: 29.952000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  106.000  -47.592   58.408
T90    81.000  -41.592   39.408
T50    28.000  -23.592    4.408
Peak    1.000    2.408    3.408

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
   85.2174   -13.3995   0.0165    12.7357    -4.6855         1.6747031     11.711 TRIG_00967774                 
 
Foreground time interval of the image:
-47.592  41.509 (delta_t =  89.101 [sec])
Background time interval of the image:
-239.592 -47.592 (delta_t = 192.000 [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 4.096000

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 4.096000

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 4.096000

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  -47.592 sec. to   58.408 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30127     ( -0.212919   0.210257 )
Norm@50keV  : 1.16557E-03    ( -0.00012879   0.000128443 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 106 sec: 0.139090 ( -0.015557  0.015591 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22066e-06 ( -1.54741e-07  1.56564e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -47.592 sec. to   58.408 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29838     ( -0.228851   0.198501 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 1.17029E-03    ( -0.000129566   0.000127976 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 106 sec: 0.139069 ( -0.015555  0.01558 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22972e-06 ( -1.64431e-07  1.46751e-07 ) ergs/cm2

Band function

Time interval is from  -47.592 sec. to   58.408 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]    : 16.6648  (-2.98525  4.04085)
R^2/D10^2   : 1.07697E-02  (-0.00543804   0.0102739)
(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  6.491e-08   1.372e-08
25- 50  2.826e-07   5.316e-08
50-150  5.567e-07   1.238e-07
15-150  9.042e-07   1.402e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-41.8617      -200)
Norm        : 0.569964       (-0.0632253     0.0632253)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.505e-07   8.316e-08
25- 50  2.895e-07   1.573e-07
50-150  6.349e-07   3.455e-07
15-150  1.075e-06   5.920e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.29163        (-1.97942      2.277)
R1^2/D10^2  : 9.34568E-02        (-0.0490838      0.131495)
kT2 [keV]   : 76.7665        (-41.5487      -77.4756)
R2^2/D10^2  : 1.31952E-04    (-0.000106504   0.000676973)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.326e-07   5.051e-08
25- 50  2.845e-07   9.487e-08
50-150  9.126e-07   4.792e-07
15-150  1.330e-06   5.754e-07

Peak spectrum fit

Power-law model

Time interval is from    2.408 sec. to    3.408 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24304     ( -0.396401   0.384041 )
Norm@50keV  : 5.93265E-03    ( -0.0013803   0.0013785 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.700893 ( -0.164948  0.165423 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.94895e-08 ( -1.52918e-08  1.56209e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.408 sec. to    3.408 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.104781     ( -2.01906   1.51493 )
Epeak [keV] : 78.6378      ( -25.9373 -78.6362 )
Norm@50keV  : 2.77494E-02    ( -0.0277518   0.798008 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.662496 ( -0.179121  0.175135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.34663e-08 ( -1.62323e-08  1.76747e-08 ) ergs/cm2

Band function

Time interval is from    2.408 sec. to    3.408 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]    : 16.7243  (-3.71098  5.48014)
R^2/D10^2   : 5.96620E-02  (-0.0370239   0.0817007)
(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  3.414e-09   1.756e-09
25- 50  1.491e-08   6.437e-09
50-150  2.961e-08   1.503e-08
15-150  4.793e-08   2.109e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-91.5689      -199.363)
Norm        : 2.89317       (-0.677999     0.678021)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.204e-09   4.301e-09
25- 50  1.386e-08   8.195e-09
50-150  3.039e-08   1.822e-08
15-150  5.146e-08   3.087e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.93504        (-3.92676      -3.92676)
R1^2/D10^2  : 2.61124        (-2.61467      -2.61467)
kT2 [keV]   : 18.3379        (-4.7671      -18.3366)
R2^2/D10^2  : 4.15739E-02    (-0.0415868   0.0801047)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.975e-09   2.352e-09
25- 50  1.380e-08   7.965e-09
50-150  3.200e-08   1.958e-08
15-150  5.077e-08   2.775e-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: 1.36379     ( -0.208384   0.207734 )
Norm@50keV  : 1.28858E-03    ( -0.000142191   0.000141371 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 89.1 sec: 0.155683 ( -0.0170954  0.0171273 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11789e-06 ( -1.40933e-07  1.42786e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36118     ( -0.321723   0.196323 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 1.29331E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 89.1 sec: 0.156040 ( -0.01766  0.016811 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12083e-06 ( -1.43647e-07  1.30701e-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)  = 2.71e-07
S(50-100 keV) = 4.41e-07

T90 vs. Hardness ratio plot

T90                                   = 81 sec.
Hardness ratio (energy fluence ratio) = 1.62731

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.1847
Count Ratio (50-100 keV) / (15-25 keV) = 1.10294

Mask shadow pattern

IMX = 2.252587250891085E-01, IMY = 1.846227611429985E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.592000 -47.592000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6453  22.0169    0.8  47.5  -21.0   7.7340  13.8    0.7	Crab                          
 37.1865 -75.8316    2.8  54.8  167.3   5.5299   4.5 ------	UNKNOWN                       
 36.8019 -75.5928    3.3  54.7  167.6   5.4765   4.7 ------	UNKNOWN                       
 82.9026 -37.0546    2.5  11.8  147.1   1.0661   4.7 ------	UNKNOWN

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

Time interval of the image:
-47.592000 41.508600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6601  21.8542    4.4  47.4  -21.0  -0.7848  -2.6    9.7	Crab                          
 85.2174 -13.3995    1.0  12.7   -4.7   1.6746  11.7 ------	UNKNOWN                       
 63.1650  -9.5315    2.0  23.1  -74.2   1.1038   5.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
74.908590 836.008600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6595  22.0283    0.4  35.5  -27.5  31.5149  27.0    1.7	Crab                          
 60.0373 -65.5238    2.8  54.8  167.5  17.8436   4.1 ------	UNKNOWN                       
101.1035  -7.4516    3.0  16.7   45.5   3.3315   3.8 ------	UNKNOWN                       
 72.3363  27.1959    3.0  42.5  -42.1   5.4644   3.8 ------	UNKNOWN                       
 86.2690  43.4097    2.2  56.9  -24.1  18.8715   5.2 ------	UNKNOWN                       
 32.3706 -24.2060    3.3  50.9 -135.4  15.5089   3.5 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:09:47 EDT 2020