batgrbproduct analysis for trigger=817564

batgrbproduct Analysis for Trigger=817564

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): Thu May 31 09:04:50 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger817564
======================================================================

  Trigger: 00817564      Segment: 000

  BAT Trigger Time: 543635603.52   [s; MET]
      Trigger Stop: 543635604.032   [s; MET]
               UTC: 2018-03-25T01:53:02.842480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 157.431990917944   Dec: 24.4392523978687  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.22
     Image Trigger?:     NO
     Rate S/N Ratio:     19.6468827043885  [ if not an image trigger ]
     Image S/N Ratio:    10.22

  Flight Position:   [ source = BAT ]
    RA: 157.431990917944   Dec: 24.4392523978687  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 157.416106976261   Dec: 24.4610275428613  [deg; J2000]  
        { 10h 29m 39.9s , +24d 27' 39.7" }
         +/- 1.13616704732073 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.456153674740327 [arcmin] (formal 1-sigma fit error)
    SNR: 25.3463397901683
 
  Angular difference between Flight and Ground position is 1.568325 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 92.8279999494553 +/- 1.51999085311522
        Measured from: 1.75199997425079
                   to: 94.5799999237061     [s; relative to TRIGTIME]
     T50: 5.0479998588562 +/- 0.488016404579719
        Measured from: 78.5960000753403
                   to: 83.6439999341965     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 80.7519999742508     
                   to: 81.7519999742508     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00800001621246338     
                   to: 107.888000011444     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.016937   3.416420   3.178550   0.875909
           0.068329   0.073198   0.065948   0.055128 [error]
 Peak      0.213220   0.406674   0.461865   0.171989
           0.010047   0.012983   0.013887   0.010496 [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 6.10e-07 1.35e-06 2.34e-06 9.44e-06 6.39e-06 1.37e-05   erg/cm2
              Error 3.25e-08 4.16e-08 6.61e-08 6.31e-07 1.69e-07 6.59e-07   erg/cm2
Peak flux Power-law 1.07e-03 1.09e-02 1.19e-01 1.29e+01 5.32e-01 1.27e+01   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 5.74e-07 1.36e-06 2.38e-06 7.01e-06 6.31e-06 1.13e-05   erg/cm2
              Error 4.20e-08 4.41e-08 7.78e-08 1.63e-06 1.82e-07 1.62e-06   erg/cm2
Peak flux Cutoff-PL 1.86e+00 2.74e+00 2.96e+00 5.87e+00 9.33e+00 1.30e+01   ph/cm2/s
              Error 1.77e-01 1.25e-01 1.32e-01 9.98e-01 3.43e-01 1.02e+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    1.203    0.046    -      -           5.84e-03 1.47e-04   68.730 57
CPL   0.974    0.185     257.6  371.8      7.37e-03 1.36e-03   64.040 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.895    0.061    -      -           8.14e-02 2.78e-03   42.450 57
CPL   0.888    0.159    9998.0    0.0      8.19e-02 1.43e-02   42.420 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: 89.152000 sec.
T50 in the 50-300 keV band: 3.520000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  107.896   -0.008  107.888
T90    92.828    1.752   94.580
T50     5.048   78.596   83.644
Peak    1.000   80.752   81.752

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
  157.4161    24.4610   0.0076    15.5980   138.0259         1.1542966     25.346 TRIG_00817564                 
 
Foreground time interval of the image:
 -0.008  10.981 (delta_t =  10.989 [sec])
Background time interval of the image:
-239.520  -0.008 (delta_t = 239.512 [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 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   -0.008 sec. to  107.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.20313     ( -0.0465214   0.0463018 )
Norm@50keV  : 5.84403E-03    ( -0.000146609   0.000146519 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.73 using 59 PHA bins.
# Reduced chi-squared =          1.206 for     57 degrees of freedom 
# Null hypothesis probability =   1.373264e-01
 
Photon flux (15-150 keV)    in 107.9 sec: 0.686277 ( -0.018442  0.018479 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.39251e-06 ( -1.68774e-07  1.68961e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.008 sec. to  107.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.974174     ( -0.189091   0.181311 )
Epeak [keV] : 257.581      ( -89.9997 653.615 )
Norm@50keV  : 7.36735E-03    ( -0.00120593   0.00150441 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.04 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     56 degrees of freedom 
# Null hypothesis probability =   2.152852e-01
 
Photon flux (15-150 keV)    in 107.9 sec: 0.676321 ( -0.019905  0.019952 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.30786e-06 ( -1.82498e-07  1.81946e-07 ) ergs/cm2

Band function

Time interval is from   -0.008 sec. to  107.888 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]    : 20.2080  (  )
R^2/D10^2   : 2.98353E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         332.21 using 59 PHA bins.
# Reduced chi-squared =         5.8282 for     57 degrees of freedom 
# Null hypothesis probability =   1.744526e-40
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.524e-07   1.349e-08
25- 50  1.266e-06   4.802e-08
50-150  3.837e-06   1.619e-07
15-150  5.355e-06   1.586e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 2.92088       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         238.79 using 59 PHA bins.
# Reduced chi-squared =         4.1892 for     57 degrees of freedom 
# Null hypothesis probability =   4.159276e-24
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.848e-07   2.050e-08
25- 50  1.510e-06   4.100e-08
50-150  3.311e-06   9.064e-08
15-150  5.605e-06   1.484e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.45190        (-0.855773      0.934702)
R1^2/D10^2  : 0.302039        (-0.0824087      0.122493)
kT2 [keV]   : 32.9746        (-3.09093      4.20862)
R2^2/D10^2  : 5.08052E-03    (-0.00164493   0.00200344)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.91 using 59 PHA bins.
# Reduced chi-squared =          1.126 for     55 degrees of freedom 
# Null hypothesis probability =   2.431123e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.250e-07   4.677e-08
25- 50  1.402e-06   8.200e-08
50-150  4.399e-06   3.021e-07
15-150  6.326e-06   4.203e-07

Peak spectrum fit

Power-law model

Time interval is from   80.752 sec. to   81.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.894609     ( -0.0614754   0.0610197 )
Norm@50keV  : 8.13693E-02    ( -0.00278375   0.002778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.45 using 59 PHA bins.
# Reduced chi-squared =         0.7448 for     57 degrees of freedom 
# Null hypothesis probability =   9.244453e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.532126 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.15208e-07 ( -3.46256e-08  3.46966e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   80.752 sec. to   81.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.888047     ( -0.242769   0.0755213 )
Epeak [keV] : 9998.05      ( -9997.94 -9997.94 )
Norm@50keV  : 8.19098E-02    ( -0.00275941   0.0257647 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.42 using 59 PHA bins.
# Reduced chi-squared =         0.7575 for     56 degrees of freedom 
# Null hypothesis probability =   9.099090e-01
 
Photon flux (15-150 keV)    in 1 sec: 9.32553 ( -0.35272  0.33363 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.13755e-07 ( -3.64108e-08  3.42268e-08 ) ergs/cm2

Band function

Time interval is from   80.752 sec. to   81.752 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]    : 23.7489  (  )
R^2/D10^2   : 0.268843  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         194.85 using 59 PHA bins.
# Reduced chi-squared =         3.4185 for     57 degrees of freedom 
# Null hypothesis probability =   5.751413e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.705e-08   1.865e-09
25- 50  1.494e-07   7.700e-09
50-150  6.282e-07   3.605e-08
15-150  8.046e-07   3.530e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 36.5259       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         341.82 using 59 PHA bins.
# Reduced chi-squared =         5.9969 for     57 degrees of freedom 
# Null hypothesis probability =   3.108818e-42
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.095e-08   3.540e-09
25- 50  1.750e-07   6.650e-09
50-150  3.837e-07   1.515e-08
15-150  6.496e-07   2.505e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.44633        (-1.3305      1.49026)
R1^2/D10^2  : 2.49330        (-0.818741      1.37499)
kT2 [keV]   : 42.8504        (-6.36403      10.7794)
R2^2/D10^2  : 4.06099E-02    (-0.018527   0.0245299)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.26 using 59 PHA bins.
# Reduced chi-squared =         0.7501 for     55 degrees of freedom 
# Null hypothesis probability =   9.152453e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.348e-08   7.120e-09
25- 50  1.651e-07   1.570e-08
50-150  7.051e-07   1.060e-07
15-150  9.237e-07   1.086e-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: 1.62677     ( -0.105863   0.107256 )
Norm@50keV  : 6.54672E-03    ( -0.000435404   0.000432801 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.22 using 59 PHA bins.
# Reduced chi-squared =          1.460 for     57 degrees of freedom 
# Null hypothesis probability =   1.332240e-02
 
Photon flux (15-150 keV)    in 10.99 sec: 0.848409 ( -0.0531404  0.0531727 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.70789e-07 ( -4.76611e-08  4.80641e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.691508     ( -0.53028   0.469452 )
Epeak [keV] : 65.0689      ( -9.80326 21.3359 )
Norm@50keV  : 2.06090E-02    ( -0.00887762   0.0185771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.32 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     56 degrees of freedom 
# Null hypothesis probability =   9.437848e-02
 
Photon flux (15-150 keV)    in 10.99 sec: 0.815433 ( -0.055426  0.055436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.18746e-07 ( -5.27278e-08  5.3773e-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)  = 1.35e-06
S(50-100 keV) = 2.34e-06

T90 vs. Hardness ratio plot

T90                                   = 92.8279999494553 sec.
Hardness ratio (energy fluence ratio) = 1.73333

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.69387
Count Ratio (50-100 keV) / (15-25 keV) = 1.57593

Mask shadow pattern

IMX = -2.075458038916739E-01, IMY = -1.867052018994906E-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:
-239.520000 -0.008000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
172.5223  -2.1378    2.5  40.8   97.4   4.8228   4.6 ------	UNKNOWN                       
167.3886   2.8551    2.9  35.4  105.0   1.8984   3.9 ------	UNKNOWN                       
164.2872   2.5492    2.9  35.7  110.4   2.1429   4.0 ------	UNKNOWN                       
230.7105  24.4635    3.7  55.7   11.4   4.1768   3.1 ------	UNKNOWN                       
203.8386  30.3898    3.2  31.9   19.9   1.1230   3.7 ------	UNKNOWN                       
213.1964  45.9116    3.3  35.3  -10.8   1.0209   3.6 ------	UNKNOWN                       
105.6313  15.1720    2.7  57.6 -168.8   6.4512   4.2 ------	UNKNOWN                       
152.4292  56.1749    2.8  20.2  -95.2   1.1304   4.1 ------	UNKNOWN                       
113.9956  39.1014    3.2  40.1 -144.6   1.4519   3.5 ------	UNKNOWN                       
107.4718  61.6884    2.9  42.4 -109.7   4.3102   4.0 ------	UNKNOWN                       
102.1544  53.7584    2.5  45.4 -121.0   5.2230   4.7 ------	UNKNOWN

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

Time interval of the image:
-0.008000 10.980600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
157.4161  24.4610    0.5  15.6  138.0   1.1543  25.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
61.380600 602.560000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
217.8901  40.9316    3.1  52.4   14.6   4.1199   3.7 ------	UNKNOWN                       
157.4512  24.4745    0.4   0.0   18.3   8.5206  28.3 ------	UNKNOWN                       
128.6968   0.2678    2.2  36.9 -168.2   2.1008   5.3 ------	UNKNOWN                       
135.0109  47.2885    3.8  29.0  -73.7   1.4824   3.1 ------	UNKNOWN                       
111.7425  39.6340    5.7  41.1  -98.4   2.8500   2.1 ------	UNKNOWN

Plot creation:
Thu May 31 10:54:27 EDT 2018