batgrbproduct analysis for trigger=864584

batgrbproduct Analysis for Trigger=864584

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 19:23:28 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger864584
======================================================================

  Trigger: 00864584      Segment: 000

  BAT Trigger Time: 560004250.944   [s; MET]
      Trigger Stop: 560004251.968   [s; MET]
               UTC: 2018-09-30T12:43:49.266800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 76.8702927582825   Dec: -25.1383099129713  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.59
     Image Trigger?:     NO
     Rate S/N Ratio:     11.1803398874989  [ if not an image trigger ]
     Image S/N Ratio:    7.59

  Flight Position:   [ source = BAT ]
    RA: 76.8702927582825   Dec: -25.1383099129713  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 76.8940422075677   Dec: -25.1244390815755  [deg; J2000]  
        { 05h 07m 34.6s , -25d 07' 28.0" }
         +/- 2.25147425055248 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.02088927401161 [arcmin] (formal 1-sigma fit error)
    SNR: 9.54100484783182
 
  Angular difference between Flight and Ground position is 1.535230 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 6.80400002002716 +/- 0.955790754386789
        Measured from: -2.98000001907349
                   to: 3.82400000095367     [s; relative to TRIGTIME]
     T50: 2.71599996089935 +/- 1.95360585053105
        Measured from: -0.672000050544739
                   to: 2.04399991035461     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.139999985694885     
                   to: 1.13999998569489     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.24399995803833     
                   to: 4.2039999961853     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.129486   0.156480   0.058242   0.029797
           0.018584   0.019473   0.017086   0.015373 [error]
 Peak      0.037578   0.043976   0.008842   0.001839
           0.007125   0.007323   0.006472   0.005738 [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 4.00e-08 5.85e-08 6.39e-08 1.31e-07 2.03e-07 2.93e-07   erg/cm2
              Error 8.43e-09 8.75e-09 1.63e-08 6.68e-08 3.77e-08 8.43e-08   erg/cm2
Peak flux Power-law 4.18e-01 2.83e-01 1.25e-01 7.63e-02 8.63e-01 9.02e-01   ph/cm2/s
              Error 1.09e-01 6.03e-02 5.01e-02 5.73e-02 1.74e-01 1.87e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.96e-08 5.97e-08 6.35e-08 9.76e-08 1.99e-07 2.60e-07   erg/cm2
              Error 8.90e-09 1.15e-08 1.85e-08 -------- 4.40e-08 8.24e-08   erg/cm2
Peak flux Cutoff-PL 4.17e-01 2.85e-01 1.27e-01 7.21e-02 8.63e-01 9.00e-01   ph/cm2/s
              Error 1.23e-01 1.05e-01 5.02e-02 -------- 1.74e-01 1.91e-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    1.873    0.280    -      -           2.96e-03 5.51e-04   53.950 57
CPL   1.731    1.043      77.8   -0.0      3.59e-03 0.00e+00   53.900 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.178    0.418    -      -           5.27e-03 1.61e-03   57.260 57
CPL   1.746    0.000      21.6    0.0      9.93e-03 0.00e+00   57.100 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.448   -3.244    4.204
T90     6.804   -2.980    3.824
T50     2.716   -0.672    2.044
Peak    1.000    0.140    1.140

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
   76.8940   -25.1244   0.0201    26.8144  -167.5695         0.3763572      9.541 TRIG_00864584                 
 
Foreground time interval of the image:
 -3.244   4.204 (delta_t =   7.448 [sec])
Background time interval of the image:
-105.243  -3.244 (delta_t = 101.999 [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   -3.244 sec. to    4.204 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87319     ( -0.270707   0.289999 )
Norm@50keV  : 2.95798E-03    ( -0.000560058   0.000541102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.95 using 59 PHA bins.
# Reduced chi-squared =         0.9464 for     57 degrees of freedom 
# Null hypothesis probability =   5.903835e-01
 
Photon flux (15-150 keV)    in 7.448 sec: 0.419776 ( -0.062349  0.062352 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.02563e-07 ( -3.71e-08  3.8267e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.244 sec. to    4.204 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73113     ( -1.53323   0.553564 )
Epeak [keV] : 77.7763      ( -78.0184 -78.0379 )
Norm@50keV  : 3.58886E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.90 using 59 PHA bins.
# Reduced chi-squared =         0.9625 for     56 degrees of freedom 
# Null hypothesis probability =   5.547012e-01
 
Photon flux (15-150 keV)    in 7.448 sec: 0.417716 ( -0.064827  0.063516 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98916e-07 ( -4.73437e-08  4.07187e-08 ) ergs/cm2

Band function

Time interval is from   -3.244 sec. to    4.204 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]    : 9.58557  (-1.49895  1.84499)
R^2/D10^2   : 0.232396  (-0.113678   0.211236)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.42 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     57 degrees of freedom 
# Null hypothesis probability =   3.206040e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.188e-08   9.295e-09
25- 50  7.457e-08   1.703e-08
50-150  3.438e-08   1.383e-08
15-150  1.408e-07   3.143e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 79.6435       (-32.3093      81.8346)
Norm        : 1.97721       (-0.408714     0.546873)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.18 using 59 PHA bins.
# Reduced chi-squared =         0.9505 for     57 degrees of freedom 
# Null hypothesis probability =   5.816558e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.820e-08   8.517e-09
25- 50  6.282e-08   1.251e-08
50-150  8.841e-08   5.468e-08
15-150  1.894e-07   5.917e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.06128        (-2.10079      1.82694)
R1^2/D10^2  : 0.402086        (-0.212731      0.714503)
kT2 [keV]   : 67.9026        (-58.625      -69.2487)
R2^2/D10^2  : 2.27825E-04    (-0.000219576   0.00442761)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.07 using 59 PHA bins.
# Reduced chi-squared =         0.9468 for     55 degrees of freedom 
# Null hypothesis probability =   5.871364e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.606e-08   1.197e-08
25- 50  6.787e-08   2.713e-08
50-150  9.740e-08   5.494e-08
15-150  2.013e-07   8.055e-08

Peak spectrum fit

Power-law model

Time interval is from    0.140 sec. to    1.140 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17818     ( -0.387264   0.448305 )
Norm@50keV  : 5.27434E-03    ( -0.00163537   0.00157845 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.26 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     57 degrees of freedom 
# Null hypothesis probability =   4.654886e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.863375 ( -0.17399  0.174065 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.94527e-08 ( -1.27769e-08  1.35879e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.140 sec. to    1.140 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74607     ( -1.99005   -1.99005 )
Epeak [keV] : 21.6495      (   )
Norm@50keV  : 9.93478E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.10 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     56 degrees of freedom 
# Null hypothesis probability =   4.339410e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.863075 ( -0.17302  0.174455 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.140 sec. to    1.140 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]    : 8.15733  (-1.56906  1.88422)
R^2/D10^2   : 0.903289  (-0.509703   1.19719)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.86 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     57 degrees of freedom 
# Null hypothesis probability =   4.070718e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.102e-08   4.204e-09
25- 50  1.995e-08   8.201e-09
50-150  5.583e-09   3.498e-09
15-150  3.656e-08   1.409e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 43.5951       (-18.2684      44.8184)
Norm        : 5.31394       (-1.6883     2.74788)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.05 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     57 degrees of freedom 
# Null hypothesis probability =   4.730443e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.254e-08   3.462e-09
25- 50  1.710e-08   5.625e-09
50-150  1.450e-08   8.328e-09
15-150  4.413e-08   1.447e-08

Double BB

------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.88 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.71 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.55 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.53 using 59 PHA bins.
# Reduced chi-squared =          1.034 for     55 degrees of freedom 
# Reduced chi-squared =          1.013 for     55 degrees of freedom 
# Reduced chi-squared =          1.010 for     55 degrees of freedom 
# Reduced chi-squared =          1.010 for     55 degrees of freedom 
# Null hypothesis probability =   4.050417e-01
# Null hypothesis probability =   4.480112e-01
# Null hypothesis probability =   4.538745e-01
# Null hypothesis probability =   4.546931e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.168e-08   5.925e-09
25- 50  1.839e-08   1.090e-08
50-150  8.208e-09   5.795e-09
15-150  3.828e-08   2.082e-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: 1.87319     ( -0.270707   0.289999 )
Norm@50keV  : 2.95798E-03    ( -0.000560058   0.000541102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.95 using 59 PHA bins.
# Reduced chi-squared =         0.9464 for     57 degrees of freedom 
# Null hypothesis probability =   5.903835e-01
 
Photon flux (15-150 keV)    in 7.448 sec: 0.419751 ( -0.0623458  0.0623469 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.02532e-07 ( -3.70825e-08  3.82765e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71968     ( -1.52836   0.544929 )
Epeak [keV] : 74.2512      (   )
Norm@50keV  : 3.64640E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.90 using 59 PHA bins.
# Reduced chi-squared =         0.9625 for     56 degrees of freedom 
# Null hypothesis probability =   5.546975e-01
 
Photon flux (15-150 keV)    in 7.448 sec: 0.417622 ( -0.064117  0.063789 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98964e-07 ( -4.73894e-08  4.12575e-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)  = 5.85e-08
S(50-100 keV) = 6.39e-08

T90 vs. Hardness ratio plot

T90                                   = 6.80400002002716 sec.
Hardness ratio (energy fluence ratio) = 1.09231

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.20847
Count Ratio (50-100 keV) / (15-25 keV) = 0.449794

Mask shadow pattern

IMX = -4.936019236281153E-01, IMY = 1.088010896182246E-01

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:
-105.243400 -3.244000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 43.4307 -12.8661    2.3  32.9  121.9   1.2561   5.1 ------	UNKNOWN                       
 34.1637 -24.0573    2.4  26.1   96.2   0.9541   4.8 ------	UNKNOWN

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

Time interval of the image:
-3.244000 4.204000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 40.0529  -5.0227    2.1  41.3  119.8   0.7149   5.4 ------	UNKNOWN                       
 76.8941 -25.1244    1.2  26.8 -167.6   0.3764   9.5 ------	UNKNOWN                       
303.7906 -63.3568    2.1  58.9   -9.5   1.0430   5.4 ------	UNKNOWN                       
 87.5674 -56.9285    1.9  24.3  -86.1   0.2637   6.1 ------	UNKNOWN                       
277.5768 -72.7488    2.2  58.9  -25.1   1.1275   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
192.156600 719.520700
720.056000 962.160000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6425  22.0140    0.5  47.6  177.3  30.8554  21.4    0.5	Crab                          
 45.5532  -6.8946    3.3  35.0  104.8   5.0138   3.5 ------	UNKNOWN                       
 47.3305 -20.3085    2.1  27.6   82.8   5.4043   5.5 ------	UNKNOWN                       
 66.7992   2.9819    2.6  29.8  148.2   3.6851   4.4 ------	UNKNOWN                       
107.0314  21.3979    2.7  55.0 -156.4  11.3774   4.3 ------	UNKNOWN                       
121.9494 -24.2451    3.2  40.8  -92.6  10.8480   3.6 ------	UNKNOWN

Plot creation:
Fri Oct 26 19:32:04 EDT 2018