batgrbproduct analysis for trigger=959431

batgrbproduct Analysis for Trigger=959431

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 14:33:00 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger959431
======================================================================

  Trigger: 00959431      Segment: 000

  BAT Trigger Time: 604895721.984   [s; MET]
      Trigger Stop: 604895723.008   [s; MET]
               UTC: 2020-03-03T02:34:57.451340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 212.69767656104   Dec: 51.3598967093526  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.7
     Image Trigger?:     NO
     Rate S/N Ratio:     34.322004603461  [ if not an image trigger ]
     Image S/N Ratio:    14.7

  Flight Position:   [ source = BAT ]
    RA: 212.69767656104   Dec: 51.3598967093526  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 212.69658988338   Dec: 51.3593029246216  [deg; J2000]  
        { 14h 10m 47.2s , +51d 21' 33.5" }
         +/- 0.761326081255073 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.293855203308316 [arcmin] (formal 1-sigma fit error)
    SNR: 44.9058667045297
 
  Angular difference between Flight and Ground position is 0.054100 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 94.2199999094009 +/- 6.39572365248616
        Measured from: -30.3439999818802
                   to: 63.8759999275208     [s; relative to TRIGTIME]
     T50: 28.7559999227524 +/- 1.24452078500068
        Measured from: -11.0799999237061
                   to: 17.6759999990463     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.340000033378601     
                   to: 1.3400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -36.5479999780655     
                   to: 193.259999990463     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.308552   8.079909   5.898790   1.447444
           0.112095   0.115383   0.100965   0.083117 [error]
 Peak      0.158947   0.240725   0.162538   0.042613
           0.011605   0.012577   0.011352   0.008267 [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 2.07e-06 3.49e-06 4.48e-06 1.16e-05 1.32e-05 2.16e-05   erg/cm2
              Error 8.81e-08 8.49e-08 1.10e-07 6.62e-07 2.73e-07 7.09e-07   erg/cm2
Peak flux Power-law 1.77e+00 1.69e+00 1.12e+00 1.16e+00 5.06e+00 5.74e+00   ph/cm2/s
              Error 1.84e-01 1.11e-01 9.11e-02 1.87e-01 3.22e-01 3.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.09e-06 2.78e-06 2.90e-06 6.66e-06 9.51e-06 1.42e-05   erg/cm2
              Error 5.48e-08 1.49e-07 1.18e-07 7.04e-06 4.99e-07 5.89e-07   erg/cm2
Peak flux Cutoff-PL 1.55e+00 1.82e+00 1.19e+00 5.29e-01 4.90e+00 5.09e+00   ph/cm2/s
              Error 2.20e-01 1.39e-01 1.05e-01 2.51e-01 3.34e-01 4.17e-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    1.640    0.039    -      -           6.19e-03 1.25e-04    0.000  0
CPL   1.400    0.166     140.1   99.1      7.92e-03 1.33e-03    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.590    0.105    -      -           3.95e-02 2.56e-03    0.000  0
CPL   0.818    0.496      75.1   27.4      9.84e-02 6.21e-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: 76.544000 sec.
T50 in the 50-300 keV band: 29.440000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  229.808  -36.548  193.260
T90    94.220  -30.344   63.876
T50    28.756  -11.080   17.676
Peak    1.000    0.340    1.340

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
  212.6966    51.3593   0.0043    35.1794   172.1574        15.8571436     44.906 TRIG_00959431                 
 
Foreground time interval of the image:
-36.548  17.317 (delta_t =  53.865 [sec])
Background time interval of the image:
-45.883 -36.548 (delta_t =   9.335 [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 1.024000

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 1.024000

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 1.024000

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  -36.548 sec. to  193.260 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64030     ( -0.0393778   0.0394134 )
Norm@50keV  : 6.19154E-03    ( -0.000125436   0.000125435 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 229.8 sec: 0.805925 ( -0.019414  0.019506 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.32477e-05 ( -2.72913e-07  2.73032e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -36.548 sec. to  193.260 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39965     ( -0.168927   0.163038 )
Epeak [keV] : 140.140      ( -35.389 162.725 )
Norm@50keV  : 7.92309E-03    ( -0.0011924   0.00145901 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 229.8 sec: 0.788283 ( -0.022352  0.022525 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.5159e-06 ( -4.81279e-07  5.16616e-07 ) ergs/cm2

Band function

Time interval is from  -36.548 sec. to  193.260 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]    : 16.2078  (  )
R^2/D10^2   : 6.38815E-02  (   )
(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  7.950e-07   3.447e-08
25- 50  3.382e-06   9.307e-08
50-150  6.240e-06   2.068e-07
15-150  1.042e-05   2.057e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 181.421       (-19.0077      -181.459)
Norm        : 3.21732       (-0.0815494     0.0854443)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.863e-06   8.686e-08
25- 50  3.543e-06   1.758e-07
50-150  7.522e-06   1.547e-06
15-150  1.293e-05   1.664e-06

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.84777        (-0.677749      0.711029)
R1^2/D10^2  : 0.556727        (-0.138307      0.204066)
kT2 [keV]   : 27.5749        (-2.27561      2.93214)
R2^2/D10^2  : 7.36075E-03    (-0.00230689   0.00288418)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.616e-06   1.351e-07
25- 50  3.635e-06   1.551e-07
50-150  7.538e-06   3.826e-07
15-150  1.279e-05   5.504e-07

Peak spectrum fit

Power-law model

Time interval is from    0.340 sec. to    1.340 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59011     ( -0.104727   0.106134 )
Norm@50keV  : 3.94596E-02    ( -0.00256172   0.00255101 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 5.05549 ( -0.32202  0.32236 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.6953e-07 ( -2.56396e-08  2.58002e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.340 sec. to    1.340 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.817689     ( -0.524796   0.466784 )
Epeak [keV] : 75.1178      ( -13.6404 41.1262 )
Norm@50keV  : 9.83729E-02    ( -0.0410755   0.0831656 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 4.90460 ( -0.33435  0.33439 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.50776e-07 ( -2.82981e-08  2.83469e-08 ) ergs/cm2

Band function

Time interval is from    0.340 sec. to    1.340 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]    : 13.8186  (-0.983155  1.06903)
R^2/D10^2   : 0.773371  (-0.182513   0.235191)
(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  3.123e-08   3.605e-09
25- 50  1.146e-07   8.550e-09
50-150  1.432e-07   1.780e-08
15-150  2.891e-07   2.215e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 171.300       (-44.2283      -171.112)
Norm        : 20.8275       (-1.41042     1.53594)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.281e-08   4.960e-09
25- 50  9.970e-08   1.727e-08
50-150  2.073e-07   8.560e-08
15-150  3.598e-07   1.149e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.67947        (-1.88503      1.88588)
R1^2/D10^2  : 2.69794        (-1.12777      2.70343)
kT2 [keV]   : 27.5185        (-7.01212      18.9206)
R2^2/D10^2  : 4.26104E-02    (-0.0353395   0.0971039)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.410e-08   1.017e-08
25- 50  1.094e-07   2.458e-08
50-150  2.004e-07   8.560e-08
15-150  3.539e-07   1.141e-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: 1.54573     ( -0.0352012   0.0351701 )
Norm@50keV  : 2.02220E-02    ( -0.000377637   0.000377531 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 53.86 sec: 2.55678 ( -0.0567634  0.0571023 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02598e-05 ( -1.92495e-07  1.92465e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29839     ( -0.151514   0.146851 )
Epeak [keV] : 164.657      ( -40.8394 146.391 )
Norm@50keV  : 2.58796E-02    ( -0.00345071   0.00411191 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 53.86 sec: 2.50196 ( -0.06411  0.06458 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01263e-05 ( -2.09946e-07  2.08869e-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)  = 3.49e-06
S(50-100 keV) = 4.48e-06

T90 vs. Hardness ratio plot

T90                                   = 94.2199999094009 sec.
Hardness ratio (energy fluence ratio) = 1.28367

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.28079
Count Ratio (50-100 keV) / (15-25 keV) = 0.935047

Mask shadow pattern

IMX = -6.982902621321470E-01, IMY = -9.618305414184913E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-45.883370 -36.548000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.0291 -15.5790    1.7  39.2  -30.5   0.3835   7.0    4.7	Sco X-1                       
254.3941  35.3650   11.7  32.9 -125.7  -0.0517  -1.0    3.4	Her X-1                       
193.8261  37.4368    2.4  32.9  137.5   0.2607   4.9 ------	UNKNOWN                       
183.1153  65.3695    2.5  55.0  164.5   0.8830   4.6 ------	UNKNOWN                       
216.0037 -33.2557    2.2  51.0   11.7   0.5106   5.2 ------	UNKNOWN

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

Time interval of the image:
-36.548000 17.316600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.8468 -15.6713    8.4  39.1  -30.2   0.5544   1.4    7.9	Sco X-1                       
254.3897  35.3159    6.8  32.9 -125.6   0.6549   1.7    3.7	Her X-1                       
185.7518   2.7554    2.8  39.7   76.6   4.0095   4.1 ------	UNKNOWN                       
212.6966  51.3593    0.3  35.2  172.2  15.8585  44.9 ------	UNKNOWN                       
221.6695  61.1167    2.3  43.9 -177.4   2.2164   4.9 ------	UNKNOWN                       
247.3908 -32.6163    2.5  54.9  -21.0   3.9744   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
76.716590 962.026100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6352  35.4220    6.9  33.8  -47.4  -1.5893  -1.7    9.9	Her X-1                       
 80.5790  65.0692    2.8  57.9 -170.7  13.9949   4.1 ------	UNKNOWN                       
244.7070  22.3653    3.1  38.1  -21.6   3.2860   3.7 ------	UNKNOWN                       
257.7847   5.7097    3.6  58.9  -24.4  13.2494   3.2 ------	UNKNOWN                       
263.1972  19.4625    3.4  50.6  -39.3   9.1368   3.3 ------	UNKNOWN                       
329.4117  73.5239    2.3  48.0 -129.1  14.5896   5.0 ------	UNKNOWN

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