batgrbproduct analysis for trigger=1115156

batgrbproduct Analysis for Trigger=1115156

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 v2.48
    Process Start Time (local time): Mon Oct 24 11:36:43 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1115156
======================================================================

  Trigger: 01115156      Segment: 000

  BAT Trigger Time: 678947999.296   [s; MET]
      Trigger Stop: 678948001.344   [s; MET]
               UTC: 2022-07-08T04:39:29.839400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 103.118496522178   Dec: 72.1912587827694  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.34
     Image Trigger?:     NO
     Rate S/N Ratio:     11.5325625946708  [ if not an image trigger ]
     Image S/N Ratio:    7.34

  Flight Position:   [ source = BAT ]
    RA: 103.118496522178   Dec: 72.1912587827694  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 103.084685413375   Dec: 72.1868699652895  [deg; J2000]  
        { 06h 52m 20.3s , +72d 11' 12.7" }
         +/- 2.19372609018111 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.980261171236673 [arcmin] (formal 1-sigma fit error)
    SNR: 9.90181825844404
 
  Angular difference between Flight and Ground position is 0.674085 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 4 +/- 1.4142135623731
        Measured from: -1.2960000038147
                   to: 2.7039999961853     [s; relative to TRIGTIME]
     T50: 2 +/- 1
        Measured from: -0.296000003814697
                   to: 1.7039999961853     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.7039999961853     
                   to: 2.7039999961853     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.2960000038147     
                   to: 2.7039999961853     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.090086   0.105002   0.033711  -0.012993
           0.013403   0.013722   0.011509   0.009836 [error]
 Peak      0.026401   0.035034   0.013580   0.000605
           0.006792   0.007202   0.005870   0.005158 [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 3.20e-08 3.79e-08 3.24e-08 4.72e-08 1.19e-07 1.49e-07   erg/cm2
              Error 6.44e-09 6.52e-09 1.04e-08 2.87e-08 2.42e-08 4.25e-08   erg/cm2
Peak flux Power-law 2.97e-01 2.34e-01 1.24e-01 9.55e-02 6.99e-01 7.51e-01   ph/cm2/s
              Error 1.04e-01 5.68e-02 5.11e-02 7.76e-02 1.69e-01 1.86e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.94e-08 4.48e-08 2.72e-08 5.12e-09 1.06e-07 1.06e-07   erg/cm2
              Error 7.38e-09 9.94e-09 1.33e-08 2.37e-08 2.43e-08 3.61e-08   erg/cm2
Peak flux Cutoff-PL 2.74e-01 1.76e-01 7.66e-02 5.30e-02 5.47e-01 5.83e-01   ph/cm2/s
              Error 1.19e-01 9.11e-02 6.28e-02 5.21e-02 3.04e-01 3.49e-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    2.226    0.319    -      -           3.15e-03 7.46e-04   64.530 57
CPL   0.741    1.826      32.1   16.9      2.55e-02 3.55e-01   61.890 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.916    0.483    -      -           4.84e-03 1.51e-03   62.830 57
CPL   1.925    2.717    9995.0 -4998.8      4.81e-03 3.11e-01   62.830 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    4.000   -1.296    2.704
T90     4.000   -1.296    2.704
T50     2.000   -0.296    1.704
Peak    1.000    1.704    2.704

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
  103.0847    72.1869   0.0194    25.4132  -136.2464         0.2297943      9.902 TRIG_01115156                 
 
Foreground time interval of the image:
 -1.296   2.704 (delta_t =   4.000 [sec])
Background time interval of the image:
-239.296  -1.296 (delta_t = 238.000 [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 2.048000

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 2.048000

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 2.048000

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   -1.296 sec. to    2.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.22601     ( -0.298668   0.338638 )
Norm@50keV  : 3.14958E-03    ( -0.000756148   0.000735086 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.53     using 59 bins.
 Reduced chi-squared = 1.13211
# Null hypothesis probability of 2.30e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 4 sec: 0.528714 ( -0.084406  0.08442 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18927e-07 ( -2.37305e-08  2.47379e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.296 sec. to    2.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.740987     ( -2.29997   1.35196 )
Epeak [keV] : 32.1304      ( -22.2313 11.5636 )
Norm@50keV  : 2.55415E-02    ( -0.026402   0.682803 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.89     using 59 bins.
 Reduced chi-squared = 1.10518
# Null hypothesis probability of 2.74e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 4 sec: 0.510523 ( -0.085232  0.08582 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05755e-07 ( -2.19208e-08  2.66641e-08 ) ergs/cm2

Band function

Time interval is from   -1.296 sec. to    2.704 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]    : 8.80358  (-1.34752  1.55256)
R^2/D10^2   : 0.415112  (-0.196294   0.37803)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.55     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.30e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.476e-08   7.298e-09
25- 50  5.082e-08   1.177e-08
50-150  1.811e-08   8.210e-09
15-150  9.370e-08   2.298e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 44.5563       (-14.6689      26.4689)
Norm        : 3.23991       (-0.792873     1.1318)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.24     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.95e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.077e-08   6.486e-09
25- 50  4.232e-08   8.958e-09
50-150  3.670e-08   1.771e-08
15-150  1.098e-07   3.032e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.15180        (-1.97295      3.41231)
R1^2/D10^2  : 128.234        (-226.507      -227.901)
kT2 [keV]   : 9.97791        (-1.73886      2.74877)
R2^2/D10^2  : 0.232220    (-0.111753   0.276475)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.03     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.98e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.762e-08   1.383e-08
25- 50  4.698e-08   2.534e-08
50-150  2.419e-08   1.386e-08
15-150  9.879e-08   4.783e-08

Peak spectrum fit

Power-law model

Time interval is from    1.704 sec. to    2.704 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.91564     ( -0.454814   0.511279 )
Norm@50keV  : 4.83648E-03    ( -0.00156183   0.00145902 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.83     using 59 bins.
 Reduced chi-squared = 1.10228
# Null hypothesis probability of 2.77e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.698784 ( -0.169076  0.169081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.44805e-08 ( -1.32442e-08  1.38855e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.704 sec. to    2.704 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92526     ( -3.02827   2.40673 )
Epeak [keV] : 9995.04      ( -1.77464 -9999.3 )
Norm@50keV  : 4.80689E-03    ( -0.00153843   0.620708 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.83     using 59 bins.
 Reduced chi-squared = 1.12196
# Null hypothesis probability of 2.47e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.547305 ( -0.238201  0.370426 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.98281e-08 ( -1.72025e-08  1.36468e-08 ) ergs/cm2

Band function

Time interval is from    1.704 sec. to    2.704 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]    : 8.49569  (-1.89851  2.51158)
R^2/D10^2   : 0.615657  (-0.393882   1.02378)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.66     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.02e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.372e-09   4.573e-09
25- 50  1.622e-08   8.460e-09
50-150  5.171e-09   3.478e-09
15-150  2.976e-08   1.795e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 71.5120       (-40.7496      -71.5881)
Norm        : 3.39587       (-1.11802     2.06658)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.51e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.732e-09   3.624e-09
25- 50  1.397e-08   6.790e-09
50-150  1.823e-08   1.389e-08
15-150  4.093e-08   2.339e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-169.283      -200)
R1^2/D10^2  : 8.98412E-05        (-5.14928e-05      0.000491219)
kT2 [keV]   : 7.46843        (-0.992824      2.07512)
R2^2/D10^2  : 0.932314    (-0.586455   0.595453)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.60e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.768e-09   4.746e-09
25- 50  1.568e-08   9.225e-09
50-150  6.132e-09   4.166e-09
15-150  3.058e-08   1.806e-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: 2.22601     ( -0.298668   0.338638 )
Norm@50keV  : 3.14958E-03    ( -0.000756148   0.000735086 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.53     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.30e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 4 sec: 0.528660 ( -0.0843984  0.0844128 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.18903e-07 ( -2.3695e-08  2.47587e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.715902     ( -2.28892   1.24252 )
Epeak [keV] : 32.2248      ( -26.2097 11.5038 )
Norm@50keV  : 2.64705E-02    ( -0.0264736   0.681867 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.74e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 4 sec: 0.510417 ( -0.085185  0.08578 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05776e-07 ( -2.19244e-08  2.6676e-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)  = 3.79e-08
S(50-100 keV) = 3.24e-08

T90 vs. Hardness ratio plot

T90                                   = 4 sec.
Hardness ratio (energy fluence ratio) = 0.854881

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.16558
Count Ratio (50-100 keV) / (15-25 keV) = 0.374209

Mask shadow pattern

IMX = -3.431872264327344E-01, IMY = 3.285711767069660E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-239.296000 -1.296000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 37.7085  30.7404    3.2  35.3  -11.7   1.3634   3.6 ------	UNKNOWN                       
 75.4420  30.9378    2.6  44.5  -61.1   6.0523   4.4 ------	UNKNOWN

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

Time interval of the image:
-1.296000 2.704000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
202.4701  59.4937    2.0  54.7 -175.1   0.3887   5.7 ------	UNKNOWN                       
103.0848  72.1869    1.2  25.4 -136.2   0.2299   9.9 ------	UNKNOWN                       
 81.0614  52.6992    2.2  28.4  -87.5   0.1657   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
280.004590 713.474000
720.704000 775.732300
780.704000 962.711100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3236 -40.5462   24.5  40.8  -39.9   0.6329   0.5    9.4	Vela X-1                      
170.2779 -60.6076    2.7  38.2    6.8   5.4849   4.3    1.4	Cen X-3                       
186.8781 -62.8609    6.2  41.3   18.6  -2.3491  -1.9    8.2	GX 301-2                      
 33.7895 -20.9584    3.4  53.0 -174.2   8.5300   3.4 ------	UNKNOWN                       
151.1399 -55.3018    3.9  35.4  -11.7   3.2034   2.9 ------	UNKNOWN                       
138.5173 -43.3636    3.1  39.8  -34.5   4.6412   3.8 ------	UNKNOWN                       
 72.7455 -34.3967    3.3  31.8 -127.7   4.1261   3.5 ------	UNKNOWN                       
121.7852 -30.6527    2.3  44.5  -61.1  19.0446   5.0 ------	UNKNOWN                       
 70.7537 -18.3006    2.6  48.0 -129.0  17.0745   4.3 ------	UNKNOWN

Plot creation:
Mon Oct 24 12:41:46 EDT 2022