batgrbproduct analysis for trigger=859421

batgrbproduct Analysis for Trigger=859421

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 v2.46
    Process Start Time (local time): Fri Oct 26 16:24:38 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger859421
======================================================================

  Trigger: 00859421      Segment: 000

  BAT Trigger Time: 557848688   [s; MET]
      Trigger Stop: 557848752   [s; MET]
               UTC: 2018-09-05T13:57:46.456140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 91.0352587911709   Dec: -4.59128989702066  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.32
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.32

  Flight Position:   [ source = BAT ]
    RA: 91.0352587911709   Dec: -4.59128989702066  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 91.0383700527125   Dec: -4.59218787784411  [deg; J2000]  
        { 06h 04m 09.2s , -04d 35' 31.9" }
         +/- 1.70293470500395 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.625917281207332 [arcmin] (formal 1-sigma fit error)
    SNR: 14.2179023834398
 
  Angular difference between Flight and Ground position is 0.193720 arcmin
 
  Partial Coding Fraction: 0.2929688    [ including projection effects ]

  Duration
     T90: 165.34399998188 +/- 28.8994952744125
        Measured from: -47.2599999904633
                   to: 118.083999991417     [s; relative to TRIGTIME]
     T50: 55.067999958992 +/- 10.514913720399
        Measured from: -22.0479999780655
                   to: 33.0199999809265     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -2.09200000762939     
                   to: -1.09200000762939     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -58.932000041008     
                   to: 146.659999966621     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.730808   2.435526   1.881047   0.411693
           0.141017   0.147103   0.128729   0.114850 [error]
 Peak      0.024613   0.037357   0.040866   0.017095
           0.011616   0.011736   0.010400   0.008847 [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 6.17e-07 1.08e-06 1.43e-06 3.91e-06 4.17e-06 7.03e-06   erg/cm2
              Error 7.15e-08 7.61e-08 1.27e-07 7.40e-07 3.06e-07 8.37e-07   erg/cm2
Peak flux Power-law 3.18e-01 3.17e-01 2.21e-01 2.45e-01 9.53e-01 1.10e+00   ph/cm2/s
              Error 1.66e-01 1.07e-01 8.04e-02 1.81e-01 3.04e-01 3.35e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.74e-07 1.12e-06 1.47e-06 2.18e-06 4.05e-06 5.35e-06   erg/cm2
              Error 8.49e-08 9.19e-08 1.39e-07 1.41e-06 3.35e-07 1.51e-06   erg/cm2
Peak flux Cutoff-PL 2.82e-01 3.34e-01 2.37e-01 1.39e-01 9.33e-01 9.91e-01   ph/cm2/s
              Error 1.91e-01 1.22e-01 9.49e-02 1.54e-01 3.09e-01 3.57e-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    1.585    0.118    -      -           2.17e-03 1.49e-04   68.610 57
CPL   1.177    0.476     101.6  -34.9      3.48e-03 2.01e-03   66.270 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.518    0.516    -      -           7.60e-03 2.33e-03   54.590 57
CPL   0.915    1.891      95.0    0.0      1.49e-02 8.47e-02   54.210 56
 
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: 83.200000 sec.
T50 in the 50-300 keV band: 38.464000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  205.592  -58.932  146.660
T90   165.344  -47.260  118.084
T50    55.068  -22.048   33.020
Peak    1.000   -2.092   -1.092

Click here for the BAT GCN circular template

Special notes of this burst

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
   91.0384    -4.5922   0.0135    42.8595   162.2173         3.5341083     14.218 TRIG_00859421                 
 
Foreground time interval of the image:
-12.499  72.101 (delta_t =  84.600 [sec])
Background time interval of the image:

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 64.000000

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 64.000000

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 64.000000

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  -58.932 sec. to  146.660 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58497     ( -0.117376   0.118228 )
Norm@50keV  : 2.16811E-03    ( -0.000148846   0.000148379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.61 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     57 degrees of freedom 
# Null hypothesis probability =   1.394631e-01
 
Photon flux (15-150 keV)    in 205.6 sec: 0.277339 ( -0.019338  0.019379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.17728e-06 ( -3.05476e-07  3.07212e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -58.932 sec. to  146.660 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17688     ( -0.50541   0.447019 )
Epeak [keV] : 101.576      ( -31.7799 -101.576 )
Norm@50keV  : 3.47509E-03    ( -0.00135783   0.00266961 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.27 using 59 PHA bins.
# Reduced chi-squared =          1.183 for     56 degrees of freedom 
# Null hypothesis probability =   1.638715e-01
 
Photon flux (15-150 keV)    in 205.6 sec: 0.271890 ( -0.020258  0.020273 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.05922e-06 ( -3.34935e-07  3.34606e-07 ) ergs/cm2

Band function

Time interval is from  -58.932 sec. to  146.660 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

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.6129  (-1.23284  1.35985)
R^2/D10^2   : 3.36025E-02  (-0.00922326   0.012581)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         113.56 using 59 PHA bins.
# Reduced chi-squared =         1.9923 for     57 degrees of freedom 
# Null hypothesis probability =   1.252223e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.101e-07   4.225e-08
25- 50  1.202e-06   1.137e-07
50-150  1.727e-06   2.297e-07
15-150  3.239e-06   2.858e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 185.007       (-53.7714      -185.18)
Norm        : 1.13052       (-0.0802712     0.0901805)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.33 using 59 PHA bins.
# Reduced chi-squared =          1.164 for     57 degrees of freedom 
# Null hypothesis probability =   1.862246e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.843e-07   6.034e-08
25- 50  1.114e-06   2.861e-07
50-150  2.381e-06   9.985e-07
15-150  4.080e-06   1.343e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.14059        (-1.39325      1.60106)
R1^2/D10^2  : 0.274504        (-0.131817      0.305481)
kT2 [keV]   : 25.4337        (-4.68617      8.36972)
R2^2/D10^2  : 3.58816E-03    (-0.0022974   0.004233)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.85 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     55 degrees of freedom 
# Null hypothesis probability =   1.708977e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.538e-07   1.801e-07
25- 50  1.141e-06   2.991e-07
50-150  2.368e-06   8.039e-07
15-150  4.063e-06   1.239e-06

Peak spectrum fit

Power-law model

Time interval is from   -2.092 sec. to   -1.092 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51796     ( -0.514569   0.516879 )
Norm@50keV  : 7.59880E-03    ( -0.00233441   0.00232394 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.59 using 59 PHA bins.
# Reduced chi-squared =         0.9578 for     57 degrees of freedom 
# Null hypothesis probability =   5.659497e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.953303 ( -0.302154  0.304977 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.18886e-08 ( -2.31784e-08  2.3503e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.092 sec. to   -1.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.914974     ( -2.3676   1.41406 )
Epeak [keV] : 95.0241      ( -94.9652 -94.9652 )
Norm@50keV  : 1.49423E-02    ( -0.00949984   0.159864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.21 using 59 PHA bins.
# Reduced chi-squared =         0.9680 for     56 degrees of freedom 
# Null hypothesis probability =   5.430155e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.932796 ( -0.308037  0.310164 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.94339e-08 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -2.092 sec. to   -1.092 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

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 17.3057  (-6.2619  8.75523)
R^2/D10^2   : 6.60059E-02  (-0.0653702   0.249461)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.90 using 59 PHA bins.
# Reduced chi-squared =         0.9982 for     57 degrees of freedom 
# Null hypothesis probability =   4.789481e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.006e-09   2.647e-09
25- 50  1.798e-08   1.092e-08
50-150  3.865e-08   2.560e-08
15-150  6.063e-08   3.851e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-199.363      -199.363)
Norm        : 3.93897       (-1.19091     1.56746)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.33 using 59 PHA bins.
# Reduced chi-squared =         0.9531 for     57 degrees of freedom 
# Null hypothesis probability =   5.760244e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.808e-09   6.120e-09
25- 50  1.887e-08   1.151e-08
50-150  4.138e-08   2.473e-08
15-150  7.006e-08   4.256e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.11781        (-2.85407      6.70345)
R1^2/D10^2  : 1.68062        (-1.62636      5.97256)
kT2 [keV]   : 24.9679        (-21.7405      42.3258)
R2^2/D10^2  : 1.51653E-02    (-0.0146245   0.0442699)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.04 using 59 PHA bins.
# Reduced chi-squared =         0.9643 for     55 degrees of freedom 
# Null hypothesis probability =   5.500587e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.023e-08   6.350e-09
25- 50  1.825e-08   9.625e-09
50-150  4.396e-08   2.862e-08
15-150  7.245e-08   3.819e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54379     ( -0.175943   0.17691 )
Norm@50keV  : 2.64276E-03    ( -0.000265735   0.000264555 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.93 using 59 PHA bins.
# Reduced chi-squared =         0.9286 for     57 degrees of freedom 
# Null hypothesis probability =   6.285355e-01
 
Photon flux (15-150 keV)    in 84.6 sec: 0.333960 ( -0.034249  0.0343629 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10667e-06 ( -2.27511e-07  2.28997e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54799     ( -0.343527   0.174094 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.64470E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.93 using 59 PHA bins.
# Reduced chi-squared =         0.9452 for     56 degrees of freedom 
# Null hypothesis probability =   5.917801e-01
 
Photon flux (15-150 keV)    in 84.6 sec: 0.334076 ( -0.034546  0.033712 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10727e-06 ( -2.36347e-07  2.26889e-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)  = 1.08e-06
S(50-100 keV) = 1.43e-06

T90 vs. Hardness ratio plot

T90                                   = 165.34399998188 sec.
Hardness ratio (energy fluence ratio) = 1.32407

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.40716
Count Ratio (50-100 keV) / (15-25 keV) = 1.0868

Mask shadow pattern

IMX = -8.836050525301786E-01, IMY = -2.833996645354648E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

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:

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

Time interval of the image:
-12.499400 72.100590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4388 -40.5190    1.4  10.8  -15.0   0.8604   8.3    4.6	Vela X-1                      
170.3449 -60.5058    7.0  39.4    2.2   0.2739   1.6    7.1	Cen X-3                       
186.3645 -62.6616   10.0  47.3    2.5  -0.2505  -1.2   10.3	GX 301-2                      
158.0416 -83.9548    2.4  50.8   31.7   2.8035   4.9 ------	UNKNOWN                       
120.3573 -73.2889    2.5  39.1   37.9   0.9352   4.7 ------	UNKNOWN                       
 91.0384  -4.5922    0.8  42.9  162.2   3.5351  14.2 ------	UNKNOWN                       
122.6084  20.6742    3.3  54.9 -146.1   2.4297   3.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
134.500600 363.110000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6114  22.0233    1.2  27.6  173.6   5.3819   9.5    1.3	Crab                          
135.5365 -40.3759    6.8  53.6  -33.0  -3.5772  -1.7   10.7	Vela X-1                      
113.5346  49.1271    2.8  57.2 -154.1  10.7941   4.1 ------	UNKNOWN

Plot creation:
Fri Oct 26 16:49:31 EDT 2018