batgrbproduct analysis for trigger=958141

batgrbproduct Analysis for Trigger=958141

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 14:41:11 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger958141
======================================================================

  Trigger: 00958141      Segment: 000

  BAT Trigger Time: 604207513.792   [s; MET]
      Trigger Stop: 604207517.888   [s; MET]
               UTC: 2020-02-24T03:24:49.304000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 248.794294261897   Dec: 41.6752702574759  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.8
     Image Trigger?:     NO
     Rate S/N Ratio:     10.7238052947636  [ if not an image trigger ]
     Image S/N Ratio:    6.8

  Flight Position:   [ source = BAT ]
    RA: 248.794294261897   Dec: 41.6752702574759  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 248.743357953247   Dec: 41.6657925200282  [deg; J2000]  
        { 16h 34m 58.4s , +41d 39' 56.9" }
         +/- 3.50192149647006 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.27280600428937 [arcmin] (formal 1-sigma fit error)
    SNR: 5.07618918817333
 
  Angular difference between Flight and Ground position is 2.352665 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 45 +/- 9.21954445729289
        Measured from: -0.79200005531311
                   to: 44.2079999446869     [s; relative to TRIGTIME]
     T50: 30 +/- 20.0997512422418
        Measured from: 2.20799994468689
                   to: 32.2079999446869     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.20799994468689     
                   to: 3.20799994468689     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.79200005531311     
                   to: 49.2079999446869     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.247527   0.093391   0.172701   0.047047
           0.042564   0.041388   0.035946   0.031581 [error]
 Peak      0.012647   0.013906   0.016637   0.004709
           0.006234   0.006129   0.005310   0.004531 [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 4.80e-08 7.85e-08 9.80e-08 2.41e-07 2.93e-07 4.66e-07   erg/cm2
              Error 1.86e-08 1.78e-08 3.82e-08 2.12e-07 8.52e-08 2.43e-07   erg/cm2
Peak flux Power-law 8.91e-02 1.14e-01 1.07e-01 1.77e-01 3.70e-01 4.88e-01   ph/cm2/s
              Error 6.35e-02 5.00e-02 4.10e-02 1.58e-01 1.33e-01 1.82e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.55e-08 2.44e-08 3.13e-08 2.38e-07 1.98e-07 4.83e-07   erg/cm2
              Error 1.97e-08 -------- 3.56e-08 -------- -------- 2.48e-07   erg/cm2
Peak flux Cutoff-PL 8.74e-02 1.15e-01 1.08e-01 1.62e-01 3.69e-01 4.72e-01   ph/cm2/s
              Error 7.14e-02 5.43e-02 4.75e-02 1.40e-01 1.38e-01 2.18e-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    1.685    0.513    -      -           6.31e-04 1.72e-04    0.000  0
CPL   2.153    0.875      59.2    0.0      3.67e-04 0.00e+00    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.092    0.664    -      -           3.20e-03 1.12e-03    0.000  0
CPL   0.996    1.678     576.2    0.0      3.54e-03 1.34e-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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   50.000   -0.792   49.208
T90    45.000   -0.792   44.208
T50    30.000    2.208   32.208
Peak    1.000    2.208    3.208

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
  248.7434    41.6658   0.0378     6.9107   156.1812         0.4093704      5.076 TRIG_00958141                 
 
Foreground time interval of the image:
 -0.792  49.208 (delta_t =  50.000 [sec])
Background time interval of the image:
-239.792  -0.792 (delta_t = 239.000 [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   -0.792 sec. to   49.208 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68530     ( -0.481797   0.544352 )
Norm@50keV  : 6.30884E-04    ( -0.000181816   0.000162555 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 50 sec: 8.33672E-02 ( -0.0188701  0.0188738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.92422e-07 ( -8.39875e-08  8.6387e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.792 sec. to   49.208 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.15306     ( -1.06905   0.680789 )
Epeak [keV] : 59.1840      (   )
Norm@50keV  : 3.66518E-04    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 50 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98199e-07 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.792 sec. to   49.208 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]    : 18.7397  (-5.59494  7.95618)
R^2/D10^2   : 4.09461E-03  (-0.00276509   0.00920763)
(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  6.561e-08   3.923e-08
25- 50  3.564e-08   2.348e-08
50-150  1.005e-09   1.093e-09
15-150  1.023e-07   6.322e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.219       (-134.061      -199.307)
Norm        : 0.331603       (-0.0753113     0.105251)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.129e-08   2.458e-08
25- 50  7.942e-08   4.660e-08
50-150  1.741e-07   1.021e-07
15-150  2.948e-07   1.759e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.35256        (-0.971613      1.26308)
R1^2/D10^2  : 3.01609        (-2.45956      10.771)
kT2 [keV]   : 25.8022        (-7.55415      15.4404)
R2^2/D10^2  : 1.28995E-03    (-0.00096714   0.00264166)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.177e-08   3.518e-08
25- 50  5.378e-08   2.795e-08
50-150  2.076e-07   1.274e-07
15-150  3.232e-07   1.817e-07

Peak spectrum fit

Power-law model

Time interval is from    2.208 sec. to    3.208 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09213     ( -0.701099   0.627402 )
Norm@50keV  : 3.19583E-03    ( -0.00112443   0.00110697 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.370417 ( -0.13255  0.134007 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.35012e-08 ( -1.23867e-08  1.26401e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.208 sec. to    3.208 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.995761     ( -4.36373   -1.00705 )
Epeak [keV] : 576.175      ( -666.823 -666.823 )
Norm@50keV  : 3.53971E-03    ( -0.00134376   0.265829 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 0.369091 ( -0.140415  0.135155 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.33434e-08 ( -1.38378e-08  1.27321e-08 ) ergs/cm2

Band function

Time interval is from    2.208 sec. to    3.208 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]    : 20.0668  (-7.32895  17.2375)
R^2/D10^2   : 1.71273E-02  (-0.0171378   0.060157)
(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  1.328e-09   8.875e-10
25- 50  6.628e-09   4.112e-09
50-150  1.980e-08   1.354e-08
15-150  2.775e-08   1.776e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-116.949      -199.363)
Norm        : 1.54128       (-0.548478     0.548464)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.838e-09   2.507e-09
25- 50  7.383e-09   4.544e-09
50-150  1.619e-08   9.910e-09
15-150  2.741e-08   1.745e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 13.5979        (-8.04876      14.7895)
R1^2/D10^2  : 4.78665E-02        (-0.0328801      -0.0478187)
kT2 [keV]   : 197.988        (-198.053      -198.053)
R2^2/D10^2  : 5.67033E-05    (-5.72341e-05   0.0493816)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.946e-09   1.324e-09
25- 50  7.379e-09   4.496e-09
50-150  2.299e-08   1.011e-08
15-150  3.232e-08   1.573e-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: 1.68530     ( -0.481797   0.544352 )
Norm@50keV  : 6.30884E-04    ( -0.000181816   0.000162555 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 50 sec: 8.33637E-02 ( -0.0188689  0.0188729 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9241e-07 ( -8.394e-08  8.6399e-08 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.10283     ( -0.499383   0.533933 )
Epeak [keV] : 40.6425      ( -9999.35 -9999.36 )
Norm@50keV  : 3.85646E-04    ( -9.65533e-05   0.000773825 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 50 sec: 8.33348E-02 ( -0.018765  0.0188542 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.90414e-07 ( -8.2103e-08  8.8501e-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)  = 7.85e-08
S(50-100 keV) = 9.80e-08

T90 vs. Hardness ratio plot

T90                                   = 45 sec.
Hardness ratio (energy fluence ratio) = 1.24841

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.377296
Count Ratio (50-100 keV) / (15-25 keV) = 0.697706

Mask shadow pattern

IMX = -1.108792436603872E-01, IMY = -4.894704715791295E-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:
-239.792000 -0.792000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9626 -15.6286    0.7  50.7   -8.1   9.2148  16.5    1.2	Sco X-1                       
254.4679  35.3173    0.9   3.5 -113.4   3.0767  13.0    1.6	Her X-1                       
268.3871  -1.3199    6.8  40.0  -43.6   0.7304   1.7    8.0	SW J1753.5-0127               
299.5802  35.1813    1.1  40.0 -119.8   6.3430  10.8    1.3	Cyg X-1                       
308.0374  41.0894    5.2  45.2 -130.5   1.5998   2.2    8.8	Cyg X-3                       
331.4254  73.6291    3.0  54.3 -174.5   3.3543   3.8 ------	UNKNOWN

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

Time interval of the image:
-0.792000 49.208000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9807 -15.5906   14.9  50.7   -8.1   0.1568   0.8    3.0	Sco X-1                       
254.4604  35.3217  631.1   3.5 -113.5   0.0015   0.0    1.3	Her X-1                       
268.3779  -1.5345   23.1  40.2  -43.5   0.0800   0.5    4.9	SW J1753.5-0127               
299.5559  35.2345    6.2  40.0 -119.9  -0.3838  -1.9    2.6	Cyg X-1                       
308.0548  40.7623    7.9  45.2 -130.1   0.4033   1.5   11.7	Cyg X-3                       
239.9910  56.7763    2.4  23.0  151.0   0.4533   4.8 ------	UNKNOWN                       
248.7409  41.6656    2.3   6.9  156.2   0.4076   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
81.308600 962.330900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9770 -15.6319    1.7  57.4   -4.0  22.6913   6.7    0.5	Sco X-1                       
254.4577  35.3399    0.8   7.7  -45.2   9.8891  15.1    0.2	Her X-1                       
268.5346  -1.3344    7.1  46.6  -36.1   2.2322   1.6   12.3	SW J1753.5-0127               
299.5940  35.1896    1.0  39.7 -106.2  28.1126  11.9    0.7	Cyg X-1                       
307.9968  40.9709    5.1  43.6 -118.1  -6.4996  -2.2    5.3	Cyg X-3                       
200.1787  45.4584    4.2  34.9  104.7   3.8485   2.8 ------	UNKNOWN                       
228.9484   4.4050    2.8  41.3   22.5   4.3439   4.1 ------	UNKNOWN                       
311.7797  55.5209    3.2  42.3 -139.8   4.6873   3.6 ------	UNKNOWN                       
345.6892  61.5516    3.7  57.2 -154.1  13.3819   3.1 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:26:11 EDT 2020