batgrbproduct analysis for trigger=930285

batgrbproduct Analysis for Trigger=930285

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): Wed Nov 27 12:09:35 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger930285
======================================================================

  Trigger: 00930285      Segment: 000

  BAT Trigger Time: 593190777.408   [s; MET]
      Trigger Stop: 593190777.664   [s; MET]
               UTC: 2019-10-19T15:12:33.632500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 340.038362226781   Dec: -17.3332351323859  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.94
     Image Trigger?:     NO
     Rate S/N Ratio:     24.1867732448956  [ if not an image trigger ]
     Image S/N Ratio:    10.94

  Flight Position:   [ source = BAT ]
    RA: 340.038362226781   Dec: -17.3332351323859  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 340.034688608033   Dec: -17.3399630861776  [deg; J2000]  
        { 22h 40m 08.3s , -17d 20' 23.9" }
         +/- 0.638786550908101 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.199005274414667 [arcmin] (formal 1-sigma fit error)
    SNR: 57.7007654464149
 
  Angular difference between Flight and Ground position is 0.455220 arcmin
 
  Partial Coding Fraction: 0.4648438    [ including projection effects ]

  Duration
     T90: 64.3479999303818 +/- 4.44964942613322
        Measured from: 1.3400000333786
                   to: 65.6879999637604     [s; relative to TRIGTIME]
     T50: 30.4759999513626 +/- 1.03064250738057
        Measured from: 10.2080000638962
                   to: 40.6840000152588     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.136000037193298     
                   to: 0.863999962806702     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.827999949455261     
                   to: 84.3200000524521     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     7.156225   7.306946   3.424957   0.741654
           0.111709   0.115083   0.098068   0.088420 [error]
 Peak      0.184185   0.248313   0.163079   0.004535
           0.014428   0.015552   0.013351   0.010273 [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 2.87e-06 3.34e-06 2.80e-06 3.96e-06 1.05e-05 1.29e-05   erg/cm2
              Error 1.34e-07 8.69e-08 1.06e-07 3.27e-07 2.59e-07 4.09e-07   erg/cm2
Peak flux Power-law 2.37e+00 1.91e+00 1.04e+00 8.31e-01 5.70e+00 6.16e+00   ph/cm2/s
              Error 2.69e-01 1.42e-01 1.08e-01 1.66e-01 4.29e-01 4.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Cutoff-PL 1.99e+00 2.12e+00 1.12e+00 3.12e-01 5.47e+00 5.54e+00   ph/cm2/s
              Error 3.22e-01 1.82e-01 1.28e-01 1.65e-01 4.44e-01 4.76e-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    2.255    0.053    -      -           1.29e-02 3.50e-04   58.030 57
CPL   1.994   -0.900       1.2    0.3      1.75e-02 9.25e-04   54.510 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.876    0.125    -      -           4.01e-02 3.25e-03   48.570 57
CPL   0.805    0.598      53.5    9.6      1.45e-01 1.18e-01   36.800 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: 52.736000 sec.
T50 in the 50-300 keV band: 28.416000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   85.148   -0.828   84.320
T90    64.348    1.340   65.688
T50    30.476   10.208   40.684
Peak    1.000   -0.136    0.864

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
  340.0347   -17.3400   0.0033    44.4987  -170.5020        18.9034484     57.701 TRIG_00930285                 
 
Foreground time interval of the image:
 -0.828  84.320 (delta_t =  85.148 [sec])
Background time interval of the image:
-239.408  -0.828 (delta_t = 238.580 [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 0.256000

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 0.256000

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 0.256000

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   -0.828 sec. to   84.320 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.25484     ( -0.0525186   0.0529935 )
Norm@50keV  : 1.29244E-02    ( -0.000350335   0.000349037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.03 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.370189e-01
 
Photon flux (15-150 keV)    in 85.15 sec: 2.20354 ( -0.06683  0.06733 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04362e-05 ( -2.59359e-07  2.59594e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.828 sec. to   84.320 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99360     ( -0.194221   -1.9936 )
Epeak [keV] : 1.18857      ( -0.210851 0.311669 )
Norm@50keV  : 1.74665E-02    ( -0.000827872   0.0010213 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.51 using 59 PHA bins.
# Reduced chi-squared =         0.9735 for     56 degrees of freedom 
# Null hypothesis probability =   5.312836e-01
 
Photon flux (15-150 keV)    in 85.15 sec: 2.14664 ( -0.0559  0.056 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.828 sec. to   84.320 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]    : 10.8739  (  )
R^2/D10^2   : 0.629287  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         404.75 using 59 PHA bins.
# Reduced chi-squared =         7.1009 for     57 degrees of freedom 
# Null hypothesis probability =   6.803651e-54
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.321e-06   6.259e-08
25- 50  3.679e-06   1.013e-07
50-150  2.435e-06   1.371e-07
15-150  7.435e-06   1.937e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 56.3167       (-3.90664      4.3025)
Norm        : 11.0386       (-0.587825     0.499999)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.05 using 59 PHA bins.
# Reduced chi-squared =          1.369 for     57 degrees of freedom 
# Null hypothesis probability =   3.352537e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.336e-06   1.069e-07
25- 50  3.486e-06   1.022e-07
50-150  3.758e-06   1.771e-07
15-150  9.580e-06   2.384e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.35837        (-0.496208      0.507692)
R1^2/D10^2  : 4.22246        (-1.08179      1.61686)
kT2 [keV]   : 21.2134        (-2.03387      2.54505)
R2^2/D10^2  : 2.99323E-02    (-0.0111273   0.0159907)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.00 using 59 PHA bins.
# Reduced chi-squared =          1.200 for     55 degrees of freedom 
# Null hypothesis probability =   1.471438e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.305e-06   1.873e-07
25- 50  3.474e-06   1.950e-07
50-150  4.018e-06   3.564e-07
15-150  9.797e-06   5.364e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.136 sec. to    0.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.87572     ( -0.123328   0.127486 )
Norm@50keV  : 4.01073E-02    ( -0.00326792   0.00323552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.57 using 59 PHA bins.
# Reduced chi-squared =         0.8522 for     57 degrees of freedom 
# Null hypothesis probability =   7.789149e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.69774 ( -0.42911  0.42973 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.68765e-07 ( -2.9796e-08  3.00027e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.136 sec. to    0.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.804774     ( -0.636655   0.559719 )
Epeak [keV] : 53.5219      ( -7.37517 11.8432 )
Norm@50keV  : 0.145358    ( -0.070172   0.165065 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.80 using 59 PHA bins.
# Reduced chi-squared =         0.6571 for     56 degrees of freedom 
# Null hypothesis probability =   9.778870e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.46529 ( -0.44355  0.44479 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.48739e-07 ( -3.13148e-08  3.17131e-08 ) ergs/cm2

Band function

Time interval is from   -0.136 sec. to    0.864 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]    : 12.3557  (-0.996753  1.07857)
R^2/D10^2   : 1.25216  (-0.338548   0.462802)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.76 using 59 PHA bins.
# Reduced chi-squared =          1.101 for     57 degrees of freedom 
# Null hypothesis probability =   2.795245e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.051e-08   5.010e-09
25- 50  1.319e-07   1.200e-08
50-150  1.234e-07   1.972e-08
15-150  2.958e-07   2.695e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 89.3676       (-18.2189      26.2805)
Norm        : 26.0806       (-2.54681     3.01333)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.96 using 59 PHA bins.
# Reduced chi-squared =         0.6835 for     57 degrees of freedom 
# Null hypothesis probability =   9.675705e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.804e-08   7.720e-09
25- 50  1.149e-07   9.100e-09
50-150  1.742e-07   5.815e-08
15-150  3.571e-07   6.020e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.07093        (-1.93647      2.00396)
R1^2/D10^2  : 9.33539        (-5.57687      31.1235)
kT2 [keV]   : 17.8636        (-2.99031      4.9161)
R2^2/D10^2  : 0.237298    (-0.159226   0.301431)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.73 using 59 PHA bins.
# Reduced chi-squared =         0.6678 for     55 degrees of freedom 
# Null hypothesis probability =   9.724542e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.168e-08   2.714e-08
25- 50  1.174e-07   4.484e-08
50-150  1.661e-07   6.883e-08
15-150  3.452e-07   1.185e-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: 2.25484     ( -0.0525186   0.0529935 )
Norm@50keV  : 1.29244E-02    ( -0.000350335   0.000349037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.03 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     57 degrees of freedom 
# Null hypothesis probability =   4.370189e-01
 
Photon flux (15-150 keV)    in 85.15 sec: 2.20330 ( -0.0668105  0.0673188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04342e-05 ( -2.59333e-07  2.59386e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99422     ( -0.20782   -1.99422 )
Epeak [keV] : 1.07549      ( -0.191201 0.282893 )
Norm@50keV  : 1.74546E-02    ( -0.000826669   0.00103106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.51 using 59 PHA bins.
# Reduced chi-squared =         0.9734 for     56 degrees of freedom 
# Null hypothesis probability =   5.313643e-01
 
Photon flux (15-150 keV)    in 85.15 sec: 2.15238 ( -0.07939  0.08014 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02154e-05 ( -3.25358e-07  3.24507e-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)  = 3.34e-06
S(50-100 keV) = 2.80e-06

T90 vs. Hardness ratio plot

T90                                   = 64.3479999303818 sec.
Hardness ratio (energy fluence ratio) = 0.838323

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.02106
Count Ratio (50-100 keV) / (15-25 keV) = 0.478598

Mask shadow pattern

IMX = -9.691802042739096E-01, IMY = 1.621506513189872E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.256000

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:
-239.408000 -0.828000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1419  38.2096    5.2  35.7  -75.5   1.2400   2.2    6.9	Cyg X-2                       
 50.9229  51.5467    3.3  48.0   16.5   1.8967   3.5 ------	UNKNOWN                       
318.5164 -13.1252    3.0  55.3 -146.5   5.2279   3.8 ------	UNKNOWN

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

Time interval of the image:
-0.828000 84.320000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1662  38.4455   24.2  35.7  -75.1  -0.2439  -0.5    7.4	Cyg X-2                       
 47.4717  38.4081    2.4  42.0   33.4   1.7784   4.8 ------	UNKNOWN                       
 62.0873  56.5575    3.3  55.7   12.9   3.2077   3.5 ------	UNKNOWN                       
340.0347 -17.3400    0.2  44.5 -170.5  18.9020  57.7 ------	UNKNOWN                       
 11.5020  63.7623    2.4  43.0  -16.5   1.4363   4.8 ------	UNKNOWN                       
339.0416  29.0276    2.4  22.8  -87.3   1.2534   4.8 ------	UNKNOWN                       
351.8325  76.5406    3.4  55.6  -25.2   2.3383   3.4 ------	UNKNOWN                       
318.4745  12.7231    3.4  43.0 -116.2   2.7329   3.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
537.092590 962.646400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
108.7823  50.0293    3.5  40.8   98.0   4.7513   3.3 ------	UNKNOWN                       
123.1532  59.7090    3.5  35.9  116.9   2.6872   3.4 ------	UNKNOWN                       
147.0895  61.2472    2.4  29.4  135.3   2.7342   4.8 ------	UNKNOWN                       
157.2680  38.2457    2.4   5.6  126.9   1.8750   4.8 ------	UNKNOWN

Plot creation:
Wed Nov 27 16:25:28 EST 2019