batgrbproduct analysis for trigger=931242

batgrbproduct Analysis for Trigger=931242

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 12:07:52 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger931242
======================================================================

  Trigger: 00931242      Segment: 000

  BAT Trigger Time: 593584996.416   [s; MET]
      Trigger Stop: 593584996.928   [s; MET]
               UTC: 2019-10-24T04:42:52.615160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 10.1472153743508   Dec: -67.1394119919046  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.68
     Image Trigger?:     NO
     Rate S/N Ratio:     16.1864140562386  [ if not an image trigger ]
     Image S/N Ratio:    8.68

  Flight Position:   [ source = BAT ]
    RA: 10.1472153743508   Dec: -67.1394119919046  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 10.1288771567599   Dec: -67.1380774306605  [deg; J2000]  
        { 00h 40m 30.9s , -67d 08' 17.1" }
         +/- 1.30748728829961 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.526008859915265 [arcmin] (formal 1-sigma fit error)
    SNR: 20.7385854114519
 
  Angular difference between Flight and Ground position is 0.434900 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 7.08399987220764 +/- 0.978243413242523
        Measured from: -0.583999991416931
                   to: 6.49999988079071     [s; relative to TRIGTIME]
     T50: 3.31199991703033 +/- 0.539332884380847
        Measured from: 0.312000036239624
                   to: 3.62399995326996     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.307999968528748     
                   to: 0.692000031471252     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.955999970436096     
                   to: 7.44799995422363     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.269218   0.327025   0.173110   0.066431
           0.020437   0.021231   0.018392   0.015606 [error]
 Peak      0.065024   0.076365   0.044218   0.016928
           0.007316   0.007806   0.006959   0.005564 [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 8.49e-08 1.31e-07 1.52e-07 3.40e-07 4.68e-07 7.08e-07   erg/cm2
              Error 9.87e-09 9.93e-09 1.78e-08 8.13e-08 4.16e-08 9.84e-08   erg/cm2
Peak flux Power-law 6.36e-01 5.42e-01 3.15e-01 2.74e-01 1.61e+00 1.77e+00   ph/cm2/s
              Error 1.07e-01 6.22e-02 5.60e-02 9.34e-02 1.85e-01 2.08e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.17e-08 1.37e-07 1.51e-07 1.82e-07 4.50e-07 5.52e-07   erg/cm2
              Error 1.10e-08 1.37e-08 1.92e-08 1.48e-07 5.01e-08 1.60e-07   erg/cm2
Peak flux Cutoff-PL 6.15e-01 5.71e-01 3.14e-01 1.49e-01 1.59e+00 1.65e+00   ph/cm2/s
              Error 1.18e-01 8.82e-02 6.33e-02 1.50e-01 1.92e-01 2.53e-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    1.783    0.138    -      -           6.05e-03 5.20e-04   72.930 57
CPL   1.431    0.572      70.8  -24.3      9.52e-03 8.28e-03   71.820 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.782    0.205    -      -           1.18e-02 1.60e-03   62.470 57
CPL   1.371    0.980      63.8  -19.8      2.05e-02 4.31e-02   61.900 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: 4.160000 sec.
T50 in the 50-300 keV band: 2.304000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.404   -0.956    7.448
T90     7.084   -0.584    6.500
T50     3.312    0.312    3.624
Peak    1.000   -0.308    0.692

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
   10.1289   -67.1381   0.0092    25.5929  -171.7499         0.8181860     20.739 TRIG_00931242                 
 
Foreground time interval of the image:
 -0.956   7.448 (delta_t =   8.404 [sec])
Background time interval of the image:
-239.416  -0.956 (delta_t = 238.460 [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   -0.956 sec. to    7.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78303     ( -0.136265   0.13936 )
Norm@50keV  : 6.04657E-03    ( -0.000523054   0.000516326 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.93 using 59 PHA bins.
# Reduced chi-squared =          1.280 for     57 degrees of freedom 
# Null hypothesis probability =   7.586639e-02
 
Photon flux (15-150 keV)    in 8.404 sec: 0.827828 ( -0.063323  0.06336 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.68194e-07 ( -4.12945e-08  4.18125e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.956 sec. to    7.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43096     ( -0.658973   0.485585 )
Epeak [keV] : 70.8366      ( -22.1638 -70.8365 )
Norm@50keV  : 9.52351E-03    ( -0.00387189   0.0126831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.82 using 59 PHA bins.
# Reduced chi-squared =          1.282 for     56 degrees of freedom 
# Null hypothesis probability =   7.564142e-02
 
Photon flux (15-150 keV)    in 8.404 sec: 0.815628 ( -0.066549  0.066296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50554e-07 ( -5.01057e-08  5.011e-08 ) ergs/cm2

Band function

Time interval is from   -0.956 sec. to    7.448 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]    : 11.1341  (-0.963858  1.07599)
R^2/D10^2   : 0.261186  (-0.0766554   0.106078)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         102.37 using 59 PHA bins.
# Reduced chi-squared =         1.7959 for     57 degrees of freedom 
# Null hypothesis probability =   2.139184e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.699e-08   7.694e-09
25- 50  1.637e-07   1.382e-08
50-150  1.157e-07   2.189e-08
15-150  3.363e-07   3.046e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 101.165       (-25.9827      42.5109)
Norm        : 3.64383       (-0.377448     0.44963)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.84 using 59 PHA bins.
# Reduced chi-squared =          1.260 for     57 degrees of freedom 
# Null hypothesis probability =   8.917081e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.004e-08   9.623e-09
25- 50  1.387e-07   1.273e-08
50-150  2.263e-07   7.505e-08
15-150  4.450e-07   8.543e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.51928        (-1.64699      1.34921)
R1^2/D10^2  : 0.597413        (-0.250958      0.564681)
kT2 [keV]   : 45.2816        (-21.8884      -45.3995)
R2^2/D10^2  : 1.27151E-03    (-0.00103932   0.00952469)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.57 using 59 PHA bins.
# Reduced chi-squared =          1.283 for     55 degrees of freedom 
# Null hypothesis probability =   7.688493e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.135e-08   1.284e-08
25- 50  1.521e-07   2.803e-08
50-150  2.440e-07   1.120e-07
15-150  4.674e-07   1.376e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.308 sec. to    0.692 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78161     ( -0.200549   0.209344 )
Norm@50keV  : 1.17766E-02    ( -0.00161265   0.0015778 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.47 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     57 degrees of freedom 
# Null hypothesis probability =   2.880302e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.61145 ( -0.18495  0.18497 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08513e-07 ( -1.50478e-08  1.53495e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.308 sec. to    0.692 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37060     ( -1.1621   0.796918 )
Epeak [keV] : 63.8284      ( -24.1816 -63.8054 )
Norm@50keV  : 2.04775E-02    ( -0.00655744   0.0796079 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.90 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     56 degrees of freedom 
# Null hypothesis probability =   2.736855e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.58961 ( -0.19281  0.1914 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.308 sec. to    0.692 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]    : 10.4423  (-1.36239  1.57104)
R^2/D10^2   : 0.656433  (-0.267261   0.447828)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.86 using 59 PHA bins.
# Reduced chi-squared =          1.296 for     57 degrees of freedom 
# Null hypothesis probability =   6.597914e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.477e-08   2.905e-09
25- 50  3.900e-08   6.030e-09
50-150  2.304e-08   7.005e-09
15-150  7.681e-08   1.218e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 95.5208       (-33.1215      71.7014)
Norm        : 7.23925       (-1.0931     1.37298)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.83 using 59 PHA bins.
# Reduced chi-squared =          1.085 for     57 degrees of freedom 
# Null hypothesis probability =   3.078992e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.891e-08   3.295e-09
25- 50  3.240e-08   4.860e-09
50-150  5.113e-08   2.268e-08
15-150  1.024e-07   2.473e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.80409        (-1.99712      2.19182)
R1^2/D10^2  : 1.13506        (-0.553254      1.42237)
kT2 [keV]   : 199.734        (-199.734      -199.734)
R2^2/D10^2  : 1.61104E-04    (-6.59356e-05   0.0220278)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
#Fit statistic : Chi-Squared =          58.28 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     55 degrees of freedom 
# Reduced chi-squared =          1.060 for     55 degrees of freedom 
# Null hypothesis probability =   3.536102e-01
# Null hypothesis probability =   3.555948e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.742e-08   4.015e-09
25- 50  3.611e-08   9.300e-09
50-150  5.626e-08   4.548e-08
15-150  1.098e-07   5.682e-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: 1.78303     ( -0.136265   0.13936 )
Norm@50keV  : 6.04657E-03    ( -0.000523054   0.000516326 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.93 using 59 PHA bins.
# Reduced chi-squared =          1.280 for     57 degrees of freedom 
# Null hypothesis probability =   7.586639e-02
 
Photon flux (15-150 keV)    in 8.404 sec: 0.827786 ( -0.0633176  0.0633545 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.6812e-07 ( -4.13323e-08  4.18186e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43050     ( -0.658818   0.485726 )
Epeak [keV] : 70.7926      ( -21.9982 -70.8312 )
Norm@50keV  : 9.52955E-03    ( -0.00387223   0.0126827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.82 using 59 PHA bins.
# Reduced chi-squared =          1.282 for     56 degrees of freedom 
# Null hypothesis probability =   7.564140e-02
 
Photon flux (15-150 keV)    in 8.404 sec: 0.815478 ( -0.066521  0.066267 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.50671e-07 ( -5.01542e-08  5.01399e-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)  = 1.31e-07
S(50-100 keV) = 1.52e-07

T90 vs. Hardness ratio plot

T90                                   = 7.08399987220764 sec.
Hardness ratio (energy fluence ratio) = 1.16031

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.21472
Count Ratio (50-100 keV) / (15-25 keV) = 0.64301

Mask shadow pattern

IMX = -4.740104481419378E-01, IMY = 6.872941176620725E-02

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:
-239.416000 -0.956000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
275.7849 -30.2963    9.9  47.9  -50.6   1.3562   1.2    8.4	H1820-303                     
284.8904 -25.1013    0.0  45.4  -37.8  -0.4890  -0.9   13.4	HT1900.1-2455                 
330.6795  -0.3090    3.6  48.5   33.7   2.6093   3.2 ------	UNKNOWN                       
319.6301   4.2292    2.7  54.6   20.6   5.5817   4.3 ------	UNKNOWN                       
 72.5216 -52.9027    2.8  56.8  173.9   5.4708   4.1 ------	UNKNOWN

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

Time interval of the image:
-0.956000 7.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
275.7525 -30.5197    4.0  47.7  -50.8   0.4709   2.9   12.8	H1820-303                     
285.1707 -24.9634    3.0  45.3  -37.4  -0.3201  -3.8    7.8	HT1900.1-2455                 
 10.1290 -67.1381    0.6  25.6 -171.7   0.8180  20.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
813.284600 962.645100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

Plot creation:
Wed Nov 27 16:24:29 EST 2019