batgrbproduct analysis for trigger=904394

batgrbproduct Analysis for Trigger=904394

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): Mon Jul 15 18:59:25 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger904394
======================================================================

  Trigger: 00904394      Segment: 000

  BAT Trigger Time: 579943562.368   [s; MET]
      Trigger Stop: 579943562.88   [s; MET]
               UTC: 2019-05-19T07:25:39.438900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 114.764434750018   Dec: -38.8241293159876  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.76
     Image Trigger?:     NO
     Rate S/N Ratio:     45.0222167379617  [ if not an image trigger ]
     Image S/N Ratio:    6.76

  Flight Position:   [ source = BAT ]
    RA: 114.764434750018   Dec: -38.8241293159876  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 114.756667817351   Dec: -38.8137924943174  [deg; J2000]  
        { 07h 39m 01.6s , -38d 48' 49.7" }
         +/- 1.66512971456172 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.672961569435034 [arcmin] (formal 1-sigma fit error)
    SNR: 14.6812824118911
 
  Angular difference between Flight and Ground position is 0.718674 arcmin
 
  Partial Coding Fraction: 0.08105469    [ including projection effects ]

  Duration
     T90: 44.4800000190735 +/- 2.58586929632961
        Measured from: -41.6720000505447
                   to: 2.80799996852875     [s; relative to TRIGTIME]
     T50: 26.7200000286102 +/- 1.3555691946078
        Measured from: -27.0160000324249
                   to: -0.296000003814697     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.212000012397766     
                   to: 0.787999987602234     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -52.472000002861     
                   to: 5.62399995326996     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.136554  11.021014   7.686798   1.659554
           0.262051   0.288001   0.256864   0.179598 [error]
 Peak      0.484875   0.964724   0.858259   0.305616
           0.054709   0.072380   0.071790   0.043408 [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 3.03e-06 4.94e-06 6.10e-06 1.49e-05 1.83e-05 2.90e-05   erg/cm2
              Error 1.78e-07 1.74e-07 2.58e-07 1.36e-06 6.26e-07 1.54e-06   erg/cm2
Peak flux Power-law 7.66e-04 1.41e-02 9.12e-02 1.43e+01 7.51e-01 1.37e+01   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 2.78e-06 5.11e-06 6.27e-06 8.72e-06 1.78e-05 2.29e-05   erg/cm2
              Error 2.19e-07 1.99e-07 2.88e-07 2.49e-06 6.76e-07 2.55e-06   erg/cm2
Peak flux Cutoff-PL 4.20e+00 2.99e+00 1.48e+00 1.24e+00 9.19e+00 9.89e+00   ph/cm2/s
              Error 1.08e+00 7.08e-01 3.55e-01 3.90e-01 2.11e+00 2.11e+00   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    1.696    0.058    -      -           3.40e-02 1.12e-03   80.390 57
CPL   1.281    0.236      90.9   31.5      5.38e-02 1.40e-02   70.440 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.361    0.119    -      -           1.70e-01 1.42e-02   51.190 57
CPL   0.342    0.554      88.1   26.2      5.35e-01 3.51e-01   39.030 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: 43.264000 sec.
T50 in the 50-300 keV band: 21.120000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   58.096  -52.472    5.624
T90    44.480  -41.672    2.808
T50    26.720  -27.016   -0.296
Peak    1.000   -0.212    0.788

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
  114.7567   -38.8138   0.0131    39.9351   128.7765        24.1439625     14.681 TRIG_00904394                 
 
Foreground time interval of the image:
-28.267   5.624 (delta_t =  33.891 [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 0.512000

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 0.512000

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 0.512000

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  -52.472 sec. to    5.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69573     ( -0.0582495   0.0585692 )
Norm@50keV  : 3.39866E-02    ( -0.00112442   0.00112323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.39 using 59 PHA bins.
# Reduced chi-squared =          1.410 for     57 degrees of freedom 
# Null hypothesis probability =   2.233632e-02
 
Photon flux (15-150 keV)    in 58.1 sec: 4.50728 ( -0.15964  0.16006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.82914e-05 ( -6.25476e-07  6.27085e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -52.472 sec. to    5.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28087     ( -0.242533   0.2293 )
Epeak [keV] : 90.9497      ( -16.1818 46.794 )
Norm@50keV  : 5.38375E-02    ( -0.0118008   0.0161153 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.44 using 59 PHA bins.
# Reduced chi-squared =          1.258 for     56 degrees of freedom 
# Null hypothesis probability =   9.277030e-02
 
Photon flux (15-150 keV)    in 58.1 sec: 4.39086 ( -0.17036  0.17094 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78421e-05 ( -6.77405e-07  6.75558e-07 ) ergs/cm2

Band function

Time interval is from  -52.472 sec. to    5.624 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]    : 14.5413  (  )
R^2/D10^2   : 0.534481  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         273.58 using 59 PHA bins.
# Reduced chi-squared =         4.7996 for     57 degrees of freedom 
# Null hypothesis probability =   4.709475e-30
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.381e-06   8.802e-08
25- 50  5.330e-06   2.217e-07
50-150  7.561e-06   5.171e-07
15-150  1.427e-05   5.026e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 143.002       (-18.3351      26.8666)
Norm        : 18.5914       (-0.812962     0.799672)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.37 using 59 PHA bins.
# Reduced chi-squared =          1.235 for     57 degrees of freedom 
# Null hypothesis probability =   1.098880e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.785e-06   1.728e-07
25- 50  5.126e-06   2.989e-07
50-150  9.916e-06   2.327e-06
15-150  1.783e-05   2.548e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.35673        (-0.788054      0.822461)
R1^2/D10^2  : 4.16931        (-1.25276      2.03025)
kT2 [keV]   : 25.7847        (-2.69853      3.53168)
R2^2/D10^2  : 5.01445E-02    (-0.0193696   0.0273301)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.56 using 59 PHA bins.
# Reduced chi-squared =          1.265 for     55 degrees of freedom 
# Null hypothesis probability =   8.945504e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.542e-06   2.705e-07
25- 50  5.235e-06   4.061e-07
50-150  1.001e-05   1.139e-06
15-150  1.779e-05   1.572e-06

Peak spectrum fit

Power-law model

Time interval is from   -0.212 sec. to    0.788 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36135     ( -0.118825   0.119852 )
Norm@50keV  : 0.170303    ( -0.0141603   0.0141507 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.19 using 59 PHA bins.
# Reduced chi-squared =         0.8980 for     57 degrees of freedom 
# Null hypothesis probability =   6.919004e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.751056 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.65932e-06 ( -1.48266e-07  1.48728e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.212 sec. to    0.788 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.342177     ( -0.587335   0.521315 )
Epeak [keV] : 88.1182      ( -15.4914 36.9655 )
Norm@50keV  : 0.534778    ( -0.231675   0.471308 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.03 using 59 PHA bins.
# Reduced chi-squared =         0.6970 for     56 degrees of freedom 
# Null hypothesis probability =   9.587753e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.19469 ( -2.55237  1.65981 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.31364e-07 ( -1.71499e-07  1.57187e-07 ) ergs/cm2

Band function

Time interval is from   -0.212 sec. to    0.788 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]    : 17.2641  (-1.55538  1.69106)
R^2/D10^2   : 1.65417  (-0.456627   0.624691)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.57 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     57 degrees of freedom 
# Null hypothesis probability =   4.176040e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.997e-08   1.477e-08
25- 50  4.478e-07   4.675e-08
50-150  9.575e-07   1.303e-07
15-150  1.505e-06   1.475e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-24.6732      -200)
Norm        : 86.2442       (-7.14703     7.14703)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.81 using 59 PHA bins.
# Reduced chi-squared =         0.9264 for     57 degrees of freedom 
# Null hypothesis probability =   6.330211e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.147e-07   1.920e-08
25- 50  4.130e-07   4.635e-08
50-150  9.059e-07   2.663e-07
15-150  1.534e-06   3.540e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.31326        (-2.51437      3.36107)
R1^2/D10^2  : 9.52563        (-5.49678      18.1971)
kT2 [keV]   : 25.2100        (-4.73192      12.2584)
R2^2/D10^2  : 0.336704    (-0.268349   0.314225)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.04 using 59 PHA bins.
# Reduced chi-squared =         0.6916 for     55 degrees of freedom 
# Null hypothesis probability =   9.604911e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.593e-07   6.096e-08
25- 50  4.394e-07   1.692e-07
50-150  1.060e-06   5.008e-07
15-150  1.659e-06   6.414e-07

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: 1.65195     ( -0.0626243   0.0630373 )
Norm@50keV  : 4.51526E-02    ( -0.00163346   0.00163164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.09 using 59 PHA bins.
# Reduced chi-squared =          1.195 for     57 degrees of freedom 
# Null hypothesis probability =   1.492532e-01
 
Photon flux (15-150 keV)    in 33.89 sec: 5.89962 ( -0.225799  0.226308 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42289e-05 ( -5.37099e-07  5.37987e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17026     ( -0.266031   0.251227 )
Epeak [keV] : 91.2732      ( -15.608 41.4693 )
Norm@50keV  : 7.67902E-02    ( -0.0181452   0.0253978 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.80 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     56 degrees of freedom 
# Null hypothesis probability =   4.451050e-01
 
Photon flux (15-150 keV)    in 33.89 sec: 5.73507 ( -0.23898  0.23969 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38686e-05 ( -5.75351e-07  5.73893e-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)  = 4.94e-06
S(50-100 keV) = 6.10e-06

T90 vs. Hardness ratio plot

T90                                   = 44.4800000190735 sec.
Hardness ratio (energy fluence ratio) = 1.23482

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.35451
Count Ratio (50-100 keV) / (15-25 keV) = 0.944724

Mask shadow pattern

IMX = -5.243064978599906E-01, IMY = -6.526537511321755E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-28.267400 5.624000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6374  22.0255    1.4  29.3  -75.9   1.3225   8.2    0.7	Crab                          
114.7566 -38.8138    0.8  39.9  128.8  24.1455  14.7 ------	UNKNOWN                       
 71.7200 -31.5376    3.0  43.0 -176.4   1.2400   3.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
74.132590 962.712000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.7477 -40.4994    7.6  16.2   67.8   2.4832   1.5   10.5	Vela X-1                      
 30.3347 -56.2408    3.0  55.7 -172.9  30.6886   3.9 ------	UNKNOWN                       
114.6328 -10.8788    2.5  27.9  -35.2   8.4762   4.6 ------	UNKNOWN

Plot creation:
Tue Jul 16 15:46:02 EDT 2019