batgrbproduct analysis for trigger=945344

batgrbproduct Analysis for Trigger=945344

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 15:18:20 EDT 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger945344
======================================================================

  Trigger: 00945344      Segment: 000

  BAT Trigger Time: 598541401.92   [s; MET]
      Trigger Stop: 598541418.304   [s; MET]
               UTC: 2019-12-20T13:29:37.799160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 281.390866815625   Dec: 26.6672230199831  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.8
     Image Trigger?:     NO
     Rate S/N Ratio:     8.88819441731559  [ if not an image trigger ]
     Image S/N Ratio:    7.8

  Flight Position:   [ source = BAT ]
    RA: 281.390866815625   Dec: 26.6672230199831  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 281.334172693515   Dec: 26.6748587410377  [deg; J2000]  
        { 18h 45m 20.2s , +26d 40' 29.5" }
         +/- 3.06769117505058 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.49638333645907 [arcmin] (formal 1-sigma fit error)
    SNR: 6.13300310124348
 
  Angular difference between Flight and Ground position is 3.074038 arcmin
 
  Partial Coding Fraction: 0.1953125    [ including projection effects ]

  Duration
     T90: 175.583999991417 +/- 125.995058205559
        Measured from: -0.383999943733215
                   to: 175.200000047684     [s; relative to TRIGTIME]
     T50: 39.9200000762939 +/- 101.595469893744
        Measured from: 7.2960000038147
                   to: 47.2160000801086     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.69200003147125     
                   to: 7.69200003147125     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.46399998664856     
                   to: 248.416000008583     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.791219   0.863989   0.254062   0.183373
           0.155828   0.158589   0.135568   0.119978 [error]
 Peak      0.059545   0.022660   0.053637   0.018432
           0.014937   0.016052   0.013733   0.010988 [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 2.56e-07 3.29e-07 3.09e-07 5.12e-07 1.07e-06 1.41e-06   erg/cm2
              Error 7.20e-08 7.40e-08 1.20e-07 3.86e-07 2.85e-07 5.37e-07   erg/cm2
Peak flux Power-law 4.44e-01 3.79e-01 2.22e-01 1.93e-01 1.13e+00 1.24e+00   ph/cm2/s
              Error 3.55e-01 1.31e-01 1.18e-01 2.26e-01 3.83e-01 4.16e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.30e-07 4.27e-07 1.86e-07 9.76e-09 8.53e-07 8.53e-07   erg/cm2
              Error 8.43e-08 1.21e-07 1.67e-07 -------- 2.78e-07 3.76e-07   erg/cm2
Peak flux Cutoff-PL 4.11e-01 2.58e-01 1.53e-01 1.22e-01 1.16e+00 1.22e+00   ph/cm2/s
              Error 2.89e-01 2.33e-01 1.28e-01 7.54e-02 3.89e-01 4.21e-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    2.091    0.400    -      -           4.58e-04 1.33e-04    0.000  0
CPL  -0.313    3.447      34.4   13.7      1.51e-02 1.23e+01    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.775    0.780    -      -           8.27e-03 3.36e-03    0.000  0
CPL   3.392    1.298     378.8    0.0      1.48e-03 0.00e+00    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  250.880   -2.464  248.416
T90   175.584   -0.384  175.200
T50    39.920    7.296   47.216
Peak    1.000    6.692    7.692

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
  281.3342    26.6749   0.0315    37.6069  -105.2065         1.7465952      6.133 TRIG_00945344                 
 
Foreground time interval of the image:
 -2.464  62.981 (delta_t =  65.445 [sec])
Background time interval of the image:
-239.920  -2.464 (delta_t = 237.456 [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 16.384000

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 16.384000

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 16.384000

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   -2.464 sec. to  248.416 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.09107     ( -0.375814   0.424396 )
Norm@50keV  : 4.58008E-04    ( -0.000134934   0.00013092 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 250.9 sec: 7.17467E-02 ( -0.0156091  0.0156091 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06707e-06 ( -2.77932e-07  2.91345e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.464 sec. to  248.416 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.313292     ( -4.94195   1.95252 )
Epeak [keV] : 34.3584      ( -8.68597 18.7128 )
Norm@50keV  : 1.51050E-02    ( -0.0197851   24.5005 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 250.9 sec: 6.74220E-02 ( -0.01559  0.0159448 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.52081e-07 ( -2.23125e-07  3.31916e-07 ) ergs/cm2

Band function

Time interval is from   -2.464 sec. to  248.416 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]    : 8.72217  (-1.62068  2.02152)
R^2/D10^2   : 6.00299E-02  (-0.0339388   0.0745122)
(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  2.193e-07   9.460e-08
25- 50  4.435e-07   1.578e-07
50-150  1.536e-07   9.241e-08
15-150  8.164e-07   2.813e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 50.1214       (-20.9188      52.0721)
Norm        : 0.414060       (-0.129068     0.197012)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.542e-07   7.523e-08
25- 50  3.653e-07   1.192e-07
50-150  3.555e-07   2.246e-07
15-150  9.750e-07   3.519e-07

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 42.1806        (-43.0872      -43.0872)
R1^2/D10^2  : 6.03269E-05        (-5.45817e-05      0.000694397)
kT2 [keV]   : 8.07136        (-8.10578      2.20708)
R2^2/D10^2  : 7.59583E-02    (-0.0444102   -0.0745736)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.292e-07   3.535e-07
25- 50  4.259e-07   1.527e-06
50-150  2.132e-07   1.637e-06
15-150  8.684e-07   3.170e-06

Peak spectrum fit

Power-law model

Time interval is from    6.692 sec. to    7.692 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.77492     ( -0.72538   0.835255 )
Norm@50keV  : 8.26923E-03    ( -0.0036551   0.00306016 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.12879 ( -0.384178  0.38216 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.61816e-08 ( -3.07728e-08  3.0852e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    6.692 sec. to    7.692 sec.
 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.39183     ( -2.15916   0.436856 )
Epeak [keV] : 378.786      (   )
Norm@50keV  : 1.47833E-03    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 sec: 1.15840 ( -0.419819  0.35808 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.18885e-08 ( -4.1229e-08  3.25437e-08 ) ergs/cm2

Band function

Time interval is from    6.692 sec. to    7.692 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]    : 5.34764  (-1.67207  3.14131)
R^2/D10^2   : 5.94665  (-5.94665   27.2162)
(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  1.878e-08   1.157e-08
25- 50  1.443e-08   9.805e-09
50-150  8.040e-10   8.550e-10
15-150  3.401e-08   2.286e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 198.960       (-162.678      -199.095)
Norm        : 4.37217       (-1.48697     3.31928)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.089e-08   6.700e-09
25- 50  2.094e-08   1.273e-08
50-150  4.590e-08   2.732e-08
15-150  7.774e-08   4.790e-08

Double BB

XSPEC12>/*
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.58875        (-1.603      1.89389)
R1^2/D10^2  : 10.2332        (-8.16496      58.0105)
kT2 [keV]   : 43.5890        (-22.48      -44.5931)
R2^2/D10^2  : 3.22090E-03    (-0.00299079   0.0168326)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.817e-08   1.098e-08
25- 50  1.434e-08   8.080e-09
50-150  5.505e-08   3.234e-08
15-150  8.756e-08   4.577e-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: 2.05156     ( -0.366031   0.409186 )
Norm@50keV  : 1.46513E-03    ( -0.000403687   0.000388558 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 65.44 sec: 0.225145 ( -0.0467297  0.0467354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.87111e-07 ( -2.18742e-07  2.28365e-07 ) ergs/cm2

Cutoff power-law model

 XSPEC: quit
 
 
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.532049     ( -3.79728   1.59623 )
Epeak [keV] : 36.0056      (   )
Norm@50keV  : 1.27350E-02    (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 65.44 sec: 0.215521 ( -0.048407  0.046993 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.5858e-07 ( -2.13791e-07  2.97516e-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)  = 3.29e-07
S(50-100 keV) = 3.09e-07

T90 vs. Hardness ratio plot

T90                                   = 175.583999991417 sec.
Hardness ratio (energy fluence ratio) = 0.93921

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.09197
Count Ratio (50-100 keV) / (15-25 keV) = 0.321102

Mask shadow pattern

IMX = -2.020482682622891E-01, IMY = 7.433256263013049E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 16.384000

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:
-239.920000 -2.464000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4719  35.3083    4.7  32.0  -62.6   0.8909   2.5    2.2	Her X-1                       
299.6513  35.1522    3.3  32.1 -135.2   1.1523   3.5    4.2	Cyg X-1                       
308.2138  41.0174    4.8  29.2 -151.8   0.6764   2.4    6.1	Cyg X-3                       
326.3336  38.3590    8.9  38.5 -171.3  -0.4511  -1.3    7.9	Cyg X-2                       
  4.4251  59.8753    2.6  37.8  135.5   2.4223   4.4 ------	UNKNOWN                       
350.3494  64.0036    2.9  30.1  137.3   1.4985   4.0 ------	UNKNOWN                       
217.4159  25.7057    2.1  54.0  -24.9   3.8963   5.4 ------	UNKNOWN                       
316.7818  19.2122    2.8  52.2 -148.8   3.5109   4.1 ------	UNKNOWN                       
300.2862  18.7464    2.8  48.0 -129.1   4.2404   4.1 ------	UNKNOWN                       
276.7438  23.0162    3.1  41.2  -98.5   4.0915   3.8 ------	UNKNOWN

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

Time interval of the image:
-2.464000 62.980620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5246  35.2012    5.0  32.1  -62.8  -0.3779  -2.3    9.1	Her X-1                       
299.4248  35.2475   18.8  31.9 -134.9  -0.0861  -0.6    8.6	Cyg X-1                       
308.0461  40.9660  474.4  29.2 -151.6  -0.0029  -0.0    3.0	Cyg X-3                       
326.3402  38.3534    3.7  38.5 -171.3   0.4553   3.1    8.2	Cyg X-2                       
171.7519  58.5001    1.8  45.0   35.4   2.1584   6.4 ------	UNKNOWN                       
242.4134  73.8545    2.4  15.4   43.9   0.5132   4.8 ------	UNKNOWN                       
331.8025  59.3512    2.1  25.4  156.1   0.6886   5.6 ------	UNKNOWN                       
215.1544  44.0371    3.0  39.5   -9.3   0.5501   3.9 ------	UNKNOWN                       
281.3342  26.6749    1.9  37.6 -105.2   1.7471   6.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
119.180600 720.049700
720.080000 962.130000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5008  35.3795    2.5  24.5   12.1   3.2450   4.6    3.1	Her X-1                       
268.2147  -1.5687    0.0  31.0  -79.0  -1.5017  -1.6   11.5	SW J1753.5-0127               
288.7984  11.0990    7.3  17.1 -130.7   1.0559   1.6    9.2	GRS 1915+105                  
299.5453  35.1686    2.5  17.7  131.7   3.4488   4.7    3.0	Cyg X-1                       
308.1200  40.9909    3.1  26.2  124.9   3.7726   3.7    2.3	Cyg X-3                       
326.2717  38.1953    4.0  39.2  136.2   5.3494   2.9    8.9	Cyg X-2                       
275.4303  66.9006    2.8  40.4   71.2  10.9575   4.1 ------	UNKNOWN                       
254.1061  14.6116    2.8  28.2  -35.2   3.3724   4.1 ------	UNKNOWN                       
299.7642 -17.7870    2.3  47.9 -129.1  15.3302   5.0 ------	UNKNOWN

Plot creation:
Mon Jun  1 00:49:47 EDT 2020