batgrbproduct analysis for trigger=912102

batgrbproduct Analysis for Trigger=912102

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): Tue Jul 16 16:09:01 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger912102
======================================================================

  Trigger: 00912102      Segment: 000

  BAT Trigger Time: 583567351.808   [s; MET]
      Trigger Stop: 583567352.832   [s; MET]
               UTC: 2019-06-30T06:02:08.648040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 223.669276535539   Dec: 41.521090175186  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.43
     Image Trigger?:     NO
     Rate S/N Ratio:     13.4164078649987  [ if not an image trigger ]
     Image S/N Ratio:    8.43

  Flight Position:   [ source = BAT ]
    RA: 223.669276535539   Dec: 41.521090175186  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 223.729332735718   Dec: 41.5283751468225  [deg; J2000]  
        { 14h 54m 55.0s , +41d 31' 42.2" }
         +/- 1.99097091957556 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.980986883506446 [arcmin] (formal 1-sigma fit error)
    SNR: 11.3732028368896
 
  Angular difference between Flight and Ground position is 2.732916 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 5.567999958992 +/- 0.902904151689883
        Measured from: -1.30400002002716
                   to: 4.26399993896484     [s; relative to TRIGTIME]
     T50: 2.22399985790253 +/- 1.33252846376747
        Measured from: -0.115999937057495
                   to: 2.10799992084503     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.187999963760376     
                   to: 0.812000036239624     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.68400001525879     
                   to: 4.7039999961853     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.129755   0.159399   0.128524   0.033830
           0.020681   0.020183   0.018335   0.016303 [error]
 Peak      0.027411   0.051677   0.052342   0.004100
           0.008494   0.008404   0.007834   0.006599 [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 3.17e-08 6.37e-08 9.97e-08 3.42e-07 2.77e-07 5.37e-07   erg/cm2
              Error 7.53e-09 9.01e-09 1.75e-08 1.34e-07 4.28e-08 1.46e-07   erg/cm2
Peak flux Power-law 2.46e-01 3.22e-01 3.10e-01 5.30e-01 1.05e+00 1.41e+00   ph/cm2/s
              Error 8.59e-02 6.84e-02 5.91e-02 2.22e-01 1.86e-01 2.65e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.14e-08 6.39e-08 9.97e-08 3.04e-07 2.75e-07 5.00e-07   erg/cm2
              Error 7.86e-09 1.02e-08 1.83e-08 1.49e-07 4.63e-08 1.57e-07   erg/cm2
Peak flux Cutoff-PL 2.12e-01 3.30e-01 3.30e-01 3.19e-01 1.03e+00 1.19e+00   ph/cm2/s
              Error 1.07e-01 7.51e-02 7.26e-02 2.43e-01 1.94e-01 3.31e-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    1.356    0.242    -      -           4.45e-03 6.00e-04   55.670 57
CPL   1.280    1.194     446.2    0.0      4.86e-03 5.77e-03   55.660 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.056    0.306    -      -           9.12e-03 1.57e-03   56.120 57
CPL   0.504    1.075     156.0    0.0      1.60e-02 2.68e-02   55.420 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: 2.240000 sec.
T50 in the 50-300 keV band: 0.960000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    6.388   -1.684    4.704
T90     5.568   -1.304    4.264
T50     2.224   -0.116    2.108
Peak    1.000   -0.188    0.812

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
  223.7293    41.5284   0.0169     8.0325  -123.7017         0.4234625     11.373 TRIG_00912102                 
 
Foreground time interval of the image:
 -1.684   4.704 (delta_t =   6.388 [sec])
Background time interval of the image:
-239.808  -1.684 (delta_t = 238.124 [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   -1.684 sec. to    4.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35645     ( -0.241925   0.242765 )
Norm@50keV  : 4.44975E-03    ( -0.000601699   0.000598273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.67 using 59 PHA bins.
# Reduced chi-squared =         0.9767 for     57 degrees of freedom 
# Null hypothesis probability =   5.249659e-01
 
Photon flux (15-150 keV)    in 6.388 sec: 0.536790 ( -0.071953  0.072088 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77252e-07 ( -4.23996e-08  4.31277e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.684 sec. to    4.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28009     ( -1.02859   1.36024 )
Epeak [keV] : 446.218      ( -501.573 -501.573 )
Norm@50keV  : 4.86054E-03    ( -0.000968291   0.0105718 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.66 using 59 PHA bins.
# Reduced chi-squared =         0.9939 for     56 degrees of freedom 
# Null hypothesis probability =   4.876471e-01
 
Photon flux (15-150 keV)    in 6.388 sec: 0.534939 ( -0.075727  0.073343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75496e-07 ( -4.82611e-08  4.43972e-08 ) ergs/cm2

Band function

Time interval is from   -1.684 sec. to    4.704 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]    : 16.0572  (-2.75874  3.49383)
R^2/D10^2   : 4.85366E-02  (-0.0234558   0.0438232)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.44 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     57 degrees of freedom 
# Null hypothesis probability =   1.425447e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.652e-08   4.513e-09
25- 50  6.971e-08   1.216e-08
50-150  1.258e-07   3.411e-08
15-150  2.120e-07   3.977e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-62.8193      -200)
Norm        : 2.20116       (-0.292503     0.292503)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.49 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     57 degrees of freedom 
# Null hypothesis probability =   4.570218e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.502e-08   1.984e-08
25- 50  6.736e-08   3.724e-08
50-150  1.477e-07   8.237e-08
15-150  2.501e-07   1.381e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.59557        (-4.00048      4.9421)
R1^2/D10^2  : 0.393019        (-0.295423      5.84149)
kT2 [keV]   : 30.2705        (-11.928      -30.4113)
R2^2/D10^2  : 4.66764E-03    (-0.0043308   0.0178727)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.62 using 59 PHA bins.
# Reduced chi-squared =          1.030 for     55 degrees of freedom 
# Null hypothesis probability =   4.141470e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.938e-08   1.700e-08
25- 50  6.644e-08   3.418e-08
50-150  1.786e-07   9.908e-08
15-150  2.744e-07   1.445e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.188 sec. to    0.812 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05621     ( -0.311489   0.300107 )
Norm@50keV  : 9.11900E-03    ( -0.00157506   0.00157093 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.12 using 59 PHA bins.
# Reduced chi-squared =         0.9846 for     57 degrees of freedom 
# Null hypothesis probability =   5.079224e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.05371 ( -0.185775  0.18654 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.67275e-08 ( -1.81768e-08  1.8387e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.188 sec. to    0.812 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.503666     ( -1.44886   0.701673 )
Epeak [keV] : 156.024      ( -156.022 -156.022 )
Norm@50keV  : 1.59835E-02    ( -0.00814036   0.0455376 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.42 using 59 PHA bins.
# Reduced chi-squared =         0.9897 for     56 degrees of freedom 
# Null hypothesis probability =   4.966320e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02673 ( -0.194391  0.19428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.40936e-08 ( -1.92284e-08  1.92221e-08 ) ergs/cm2

Band function

Time interval is from   -0.188 sec. to    0.812 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]    : 22.2388  (-4.5634  6.19636)
R^2/D10^2   : 3.60936E-02  (-0.019246   0.0387541)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.41 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     57 degrees of freedom 
# Null hypothesis probability =   3.878012e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.287e-09   1.164e-09
25- 50  1.749e-08   5.310e-09
50-150  6.465e-08   2.403e-08
15-150  8.543e-08   2.469e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-52.1317      -200)
Norm        : 4.31442       (-0.768374     0.768374)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.02 using 59 PHA bins.
# Reduced chi-squared =          1.106 for     57 degrees of freedom 
# Null hypothesis probability =   2.718087e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.074e-08   6.195e-09
25- 50  2.067e-08   1.154e-08
50-150  4.532e-08   2.556e-08
15-150  7.673e-08   4.398e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.78938        (-3.69164      6.34259)
R1^2/D10^2  : 0.769886        (-0.688719      4.26499)
kT2 [keV]   : 29.0875        (-7.99817      22.554)
R2^2/D10^2  : 1.38432E-02    (-0.0115721   0.0161581)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.20 using 59 PHA bins.
# Reduced chi-squared =         0.9855 for     55 degrees of freedom 
# Null hypothesis probability =   5.051255e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.384e-09   4.384e-09
25- 50  1.848e-08   9.515e-09
50-150  6.979e-08   3.993e-08
15-150  9.566e-08   5.115e-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: 1.35645     ( -0.241925   0.242765 )
Norm@50keV  : 4.44975E-03    ( -0.000601699   0.000598273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.67 using 59 PHA bins.
# Reduced chi-squared =         0.9767 for     57 degrees of freedom 
# Null hypothesis probability =   5.249659e-01
 
Photon flux (15-150 keV)    in 6.388 sec: 0.536783 ( -0.0719506  0.072085 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77221e-07 ( -4.23961e-08  4.31323e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28497     ( -1.0291   1.35659 )
Epeak [keV] : 504.952      ( -504.952 -504.952 )
Norm@50keV  : 4.83417E-03    ( -0.000967691   0.0105724 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.65 using 59 PHA bins.
# Reduced chi-squared =         0.9938 for     56 degrees of freedom 
# Null hypothesis probability =   4.878786e-01
 
Photon flux (15-150 keV)    in 6.388 sec: 0.534877 ( -0.075703  0.073582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75603e-07 ( -4.81987e-08  4.43755e-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)  = 6.37e-08
S(50-100 keV) = 9.97e-08

T90 vs. Hardness ratio plot

T90                                   = 5.567999958992 sec.
Hardness ratio (energy fluence ratio) = 1.56515

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.22846
Count Ratio (50-100 keV) / (15-25 keV) = 0.990513

Mask shadow pattern

IMX = -7.830236160365243E-02, IMY = 1.174020836367789E-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:
-239.808000 -1.684000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2637  35.3324    3.7  16.6   48.7   1.3272   3.1    9.5	Her X-1                       
299.5251  35.1217    2.2  51.0   23.0   6.9482   5.1    5.8	Cyg X-1                       
307.9336  40.8700   18.0  54.6   12.9   1.1590   0.6    9.4	Cyg X-3                       
228.8801   8.9242    4.2  31.1  139.8   1.8837   2.8 ------	UNKNOWN                       
174.7744  42.4991    2.4  43.8 -116.4   7.6976   4.8 ------	UNKNOWN

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

Time interval of the image:
-1.684000 4.704000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6856  35.2951    7.4  16.9   48.4  -0.0685  -1.6   11.5	Her X-1                       
299.4925  35.2672    3.1  51.0   22.8  -0.5764  -3.7    6.2	Cyg X-1                       
308.1682  40.9427    3.8  54.7   12.7  -0.6460  -3.1    2.7	Cyg X-3                       
223.7293  41.5283    1.0   8.0 -123.7   0.4234  11.4 ------	UNKNOWN                       
206.3364  23.0035    2.4  28.8 -167.3   0.2104   4.8 ------	UNKNOWN                       
213.2508  51.5131    1.9  18.6  -93.9   0.2473   5.9 ------	UNKNOWN                       
176.0822  17.7992    3.3  54.3 -146.3   0.5404   3.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
45.892590 242.392000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3721  35.4435    3.5  24.6   54.0   0.1941   3.3    7.4	Her X-1                       
239.2333  52.9143    2.1  15.5   -2.9   0.2093   5.5 ------	UNKNOWN                       
167.5228  22.1076    2.5  50.5 -134.6   0.9007   4.6 ------	UNKNOWN

Plot creation:
Tue Jul 16 16:18:22 EDT 2019