batgrbproduct analysis for trigger=966554

batgrbproduct Analysis for Trigger=966554

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 14:18:00 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger966554
======================================================================

  Trigger: 00966554      Segment: 000

  BAT Trigger Time: 608713541.952   [s; MET]
      Trigger Stop: 608713542.464   [s; MET]
               UTC: 2020-04-16T07:05:17.171400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 335.690709384972   Dec: -7.52998032721292  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.19
     Image Trigger?:     NO
     Rate S/N Ratio:     21.6564078277077  [ if not an image trigger ]
     Image S/N Ratio:    10.19

  Flight Position:   [ source = BAT ]
    RA: 335.690709384972   Dec: -7.52998032721292  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 335.693477989413   Dec: -7.52694426326541  [deg; J2000]  
        { 22h 22m 46.4s , -07d 31' 37.0" }
         +/- 1.33918172274151 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.424268143128861 [arcmin] (formal 1-sigma fit error)
    SNR: 20.040985560328
 
  Angular difference between Flight and Ground position is 0.245570 arcmin
 
  Partial Coding Fraction: 0.3398438    [ including projection effects ]

  Duration
     T90: 6.04799997806549 +/- 0.978652094595659
        Measured from: -1.80799996852875
                   to: 4.24000000953674     [s; relative to TRIGTIME]
     T50: 3.18400013446808 +/- 0.609261909202546
        Measured from: -0.0320000648498535
                   to: 3.15200006961823     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0279999971389771     
                   to: 0.972000002861023     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.33599996566772     
                   to: 4.95999991893768     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.470313   0.561033   0.359884   0.147273
           0.039258   0.041406   0.036024   0.030863 [error]
 Peak      0.097966   0.179493   0.126429   0.020890
           0.016564   0.017684   0.015912   0.011914 [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 1.69e-07 2.63e-07 3.09e-07 7.03e-07 9.48e-07 1.44e-06   erg/cm2
              Error 2.23e-08 2.16e-08 3.59e-08 1.71e-07 8.46e-08 2.02e-07   erg/cm2
Peak flux Power-law 1.38e+00 1.26e+00 7.94e-01 7.66e-01 3.75e+00 4.20e+00   ph/cm2/s
              Error 2.76e-01 1.61e-01 1.25e-01 2.38e-01 4.72e-01 5.11e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.70e-07 2.62e-07 3.09e-07 7.02e-07 9.48e-07 1.45e-06   erg/cm2
              Error -------- -------- 4.53e-08 -------- 8.92e-08 2.87e-07   erg/cm2
Peak flux Cutoff-PL 1.24e+00 1.34e+00 8.44e-01 4.19e-01 3.68e+00 3.84e+00   ph/cm2/s
              Error 3.29e-01 1.97e-01 1.47e-01 3.40e-01 4.83e-01 6.18e-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    1.767    0.146    -      -           1.41e-02 1.22e-03    0.000  0
CPL   1.765    0.290    9999.2   -0.0      1.41e-02 8.18e-03    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.665    0.203    -      -           2.86e-02 3.62e-03    0.000  0
CPL   1.047    0.858      77.8  -29.0      5.89e-02 7.66e-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: 6.208000 sec.
T50 in the 50-300 keV band: 3.328000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.296   -2.336    4.960
T90     6.048   -1.808    4.240
T50     3.184   -0.032    3.152
Peak    1.000   -0.028    0.972

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
  335.6935    -7.5269   0.0096    47.0631  -168.2027         1.6086980     20.041 TRIG_00966554                 
 
Foreground time interval of the image:
 -2.336   4.960 (delta_t =   7.296 [sec])
Background time interval of the image:
-216.851  -2.336 (delta_t = 214.515 [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

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)

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   -2.336 sec. to    4.960 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76692     ( -0.144546   0.147398 )
Norm@50keV  : 1.40791E-02    ( -0.00122581   0.00121254 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 7.296 sec: 1.91584 ( -0.15987  0.16023 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.47123e-07 ( -8.43337e-08  8.49605e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.336 sec. to    4.960 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76479     ( -0.431013   0.149171 )
Epeak [keV] : 9999.21      ( -9999.35 -9999.36 )
Norm@50keV  : 1.41110E-02    ( -0.00697438   0.00938523 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 7.296 sec: 1.91925 ( -0.1711  0.16444 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.49458e-07 ( -9.16006e-08  8.68166e-08 ) ergs/cm2

Band function

Time interval is from   -2.336 sec. to    4.960 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]    : 11.9530  (-1.30811  1.49638)
R^2/D10^2   : 0.455497  (-0.161824   0.247559)
(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  1.004e-07   1.678e-08
25- 50  3.145e-07   3.258e-08
50-150  2.695e-07   5.067e-08
15-150  6.843e-07   7.522e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 112.330       (-29.7767      67.8562)
Norm        : 8.30087       (-0.948842     0.965874)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.581e-07   1.974e-08
25- 50  2.795e-07   2.765e-08
50-150  4.824e-07   1.800e-07
15-150  9.200e-07   1.979e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.03194        (-1.24339      1.39137)
R1^2/D10^2  : 2.60167        (-1.22622      2.7031)
kT2 [keV]   : 33.0019        (-9.27355      22.4858)
R2^2/D10^2  : 8.92793E-03    (-0.00682686   0.0186437)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.619e-07   3.958e-08
25- 50  2.762e-07   6.143e-08
50-150  5.280e-07   2.646e-07
15-150  9.661e-07   3.038e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.028 sec. to    0.972 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66542     ( -0.200197   0.206484 )
Norm@50keV  : 2.86049E-02    ( -0.00364012   0.00360853 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 3.75446 ( -0.4715  0.4726 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.65675e-07 ( -3.52445e-08  3.54591e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.028 sec. to    0.972 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04664     ( -0.975007   0.741105 )
Epeak [keV] : 77.8180      ( -19.7754 -77.818 )
Norm@50keV  : 5.88622E-02    ( -0.0324648   0.120783 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 3.67676 ( -0.48319  0.48374 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.58131e-07 ( -3.72644e-08  3.71531e-08 ) ergs/cm2

Band function

Time interval is from   -0.028 sec. to    0.972 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]    : 14.0564  (-1.96105  2.25948)
R^2/D10^2   : 0.534677  (-0.224064   0.384502)
(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  2.231e-08   4.980e-09
25- 50  8.330e-08   1.388e-08
50-150  1.086e-07   2.559e-08
15-150  2.142e-07   3.365e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 153.017       (-60.9817      -151.634)
Norm        : 15.5240       (-2.0871     2.67225)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.980e-08   1.375e-08
25- 50  7.399e-08   3.777e-08
50-150  1.472e-07   8.590e-08
15-150  2.610e-07   1.273e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.33777        (-2.80812      3.1854)
R1^2/D10^2  : 3.42778        (-2.28175      15.0464)
kT2 [keV]   : 24.0503        (-6.98675      22.9827)
R2^2/D10^2  : 5.47295E-02    (-0.0497182   0.102798)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.667e-08   2.038e-08
25- 50  7.771e-08   4.082e-08
50-150  1.435e-07   7.843e-08
15-150  2.579e-07   1.260e-07

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: 1.76692     ( -0.144546   0.147398 )
Norm@50keV  : 1.40791E-02    ( -0.00122581   0.00121254 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 7.296 sec: 1.91574 ( -0.159855  0.160217 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.46984e-07 ( -8.44556e-08  8.49612e-08 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76437     ( -0.188537   0.563789 )
Epeak [keV] : 9998.95      ( -9999.34 -9999.35 )
Norm@50keV  : 1.41168E-02    ( -0.00696545   0.00938676 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 7.296 sec: 1.91483 ( -0.15801  0.16029 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.46685e-07 ( -8.53559e-08  8.43491e-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)  = 2.63e-07
S(50-100 keV) = 3.09e-07

T90 vs. Hardness ratio plot

T90                                   = 6.04799997806549 sec.
Hardness ratio (energy fluence ratio) = 1.1749

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.19289
Count Ratio (50-100 keV) / (15-25 keV) = 0.765201

Mask shadow pattern

IMX = -1.052036859068425E+00, IMY = 2.197308086859326E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-216.851410 -2.336000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 88.9907 -34.2591    3.3  58.3   -0.4   4.8892   3.6 ------	UNKNOWN                       
 84.2391 -30.3213    3.1  56.7   -6.9   3.6739   3.7 ------	UNKNOWN

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

Time interval of the image:
-2.336000 4.960000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
335.6935  -7.5269    0.6  47.1 -168.2   1.6087  20.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
83.748590 780.748600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5634  35.2096    6.2  54.7  163.4   6.7179   1.9    1.4	Cyg X-1                       
308.1724  41.0616    3.3  54.8  174.3   9.4346   3.5    7.1	Cyg X-3                       
326.1298  38.4057    4.5  46.8 -170.7   3.8111   2.6    5.4	Cyg X-2                       
309.1448 -11.7385    2.9  26.5   98.4   4.1604   4.0 ------	UNKNOWN                       
303.0076  37.7456    2.8  54.6  168.0  13.0934   4.1 ------	UNKNOWN                       
333.4291 -10.8890    3.7   4.0   53.2   1.8650   3.1 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:11:20 EDT 2020