batgrbproduct analysis for trigger=1144698

batgrbproduct Analysis for Trigger=1144698

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): Wed Jun 14 11:59:54 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1144698
======================================================================

  Trigger: 01144698      Segment: 000

  BAT Trigger Time: 692882511.36   [s; MET]
      Trigger Stop: 692882512.384   [s; MET]
               UTC: 2022-12-16T11:21:20.956420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 326.020902229861   Dec: -34.4050890625163  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.84
     Image Trigger?:     NO
     Rate S/N Ratio:     17.832554500127  [ if not an image trigger ]
     Image S/N Ratio:    9.84

  Flight Position:   [ source = BAT ]
    RA: 326.020902229861   Dec: -34.4050890625163  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 326.053443704494   Dec: -34.4140391251465  [deg; J2000]  
        { 21h 44m 12.8s , -34d 24' 50.5" }
         +/- 1.22589283398037 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.379434483945555 [arcmin] (formal 1-sigma fit error)
    SNR: 22.7382824354101
 
  Angular difference between Flight and Ground position is 1.697993 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 228.531999945641 +/- 44.2294997864093
        Measured from: -11.9960000514984
                   to: 216.535999894142     [s; relative to TRIGTIME]
     T50: 155.999999880791 +/- 4.53429804868911
        Measured from: 6.12800002098083
                   to: 162.127999901772     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.228000044822693     
                   to: 1.22800004482269     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -38.2960000038147     
                   to: 267.907999992371     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.933583   3.799049   2.365710   0.391913
           0.142327   0.147923   0.129169   0.113459 [error]
 Peak      0.042749   0.091382   0.070834   0.020001
           0.009399   0.010133   0.009269   0.007382 [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 8.88e-07 1.47e-06 1.84e-06 4.56e-06 5.48e-06 8.76e-06   erg/cm2
              Error 7.22e-08 7.19e-08 1.26e-07 6.71e-07 2.96e-07 7.73e-07   erg/cm2
Peak flux Power-law 4.47e-01 5.52e-01 4.95e-01 7.67e-01 1.76e+00 2.26e+00   ph/cm2/s
              Error 1.06e-01 8.15e-02 7.04e-02 2.28e-01 2.27e-01 3.03e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.11e-07 1.54e-06 1.87e-06 2.04e-06 5.21e-06 6.28e-06   erg/cm2
              Error 8.79e-08 8.88e-08 1.37e-07 1.07e-06 3.42e-07 1.12e-06   erg/cm2
Peak flux Cutoff-PL 3.86e-01 5.76e-01 5.32e-01 4.32e-01 1.72e+00 1.93e+00   ph/cm2/s
              Error 1.33e-01 9.26e-02 8.92e-02 3.25e-01 2.34e-01 4.22e-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    1.677    0.089    -      -           1.93e-03 9.80e-05   57.400 57
CPL   1.118    0.389      76.2   34.5      3.73e-03 1.77e-03   50.570 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.158    0.211    -      -           1.51e-02 1.89e-03   43.950 57
CPL   0.535    0.900     131.2  -39.8      2.92e-02 3.50e-02   42.450 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: 173.952000 sec.
T50 in the 50-300 keV band: 151.232000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  306.204  -38.296  267.908
T90   228.532  -11.996  216.536
T50   156.000    6.128  162.128
Peak    1.000    0.228    1.228

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
  326.0534   -34.4140   0.0085    15.6966   -18.1638         2.9078890     22.738 TRIG_01144698                 
 
Foreground time interval of the image:
-38.296  11.741 (delta_t =  50.037 [sec])
Background time interval of the image:
-239.360 -38.296 (delta_t = 201.064 [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  -38.296 sec. to  267.908 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67658     ( -0.0884508   0.0894647 )
Norm@50keV  : 1.92691E-03    ( -9.82413e-05   9.77392e-05 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.40     using 59 bins.
 Reduced chi-squared = 1.00702
# Null hypothesis probability of 4.60e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 306.2 sec: 0.253868 ( -0.01247  0.012489 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.4744e-06 ( -2.95167e-07  2.97322e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -38.296 sec. to  267.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.11779     ( -0.406674   0.372257 )
Epeak [keV] : 76.2478      ( -14.5114 54.5881 )
Norm@50keV  : 3.72630E-03    ( -0.00129912   0.00224334 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.57     using 59 bins.
 Reduced chi-squared = 0.903036
# Null hypothesis probability of 6.80e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 306.2 sec: 0.245440 ( -0.013582  0.013597 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20326e-06 ( -3.40693e-07  3.43706e-07 ) ergs/cm2

Band function

Time interval is from  -38.296 sec. to  267.908 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]    : 13.4694  (  )
R^2/D10^2   : 3.99987E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  120.19     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.07e-06 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.707e-07   4.379e-08
25- 50  1.683e-06   1.001e-07
50-150  1.970e-06   2.010e-07
15-150  4.124e-06   2.266e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 140.718       (-29.3735      39.0256)
Norm        : 1.04855       (-0.0599503     0.0712782)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.93e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.288e-07   6.461e-08
25- 50  1.522e-06   1.312e-07
50-150  2.923e-06   8.927e-07
15-150  5.274e-06   1.063e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.54375        (-1.3515      1.69753)
R1^2/D10^2  : 0.553308        (-0.329057      1.17081)
kT2 [keV]   : 19.1934        (-2.48153      4.09633)
R2^2/D10^2  : 9.19384E-03    (-0.00502511   0.00693178)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.04e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.151e-07   2.235e-07
25- 50  1.495e-06   2.240e-07
50-150  2.702e-06   4.588e-07
15-150  5.012e-06   7.594e-07

Peak spectrum fit

Power-law model

Time interval is from    0.228 sec. to    1.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15841     ( -0.211992   0.209287 )
Norm@50keV  : 1.50695E-02    ( -0.00189184   0.00189127 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.95     using 59 bins.
 Reduced chi-squared = 0.771053
# Null hypothesis probability of 8.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.75920 ( -0.22649  0.22691 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.5476e-07 ( -2.13311e-08  2.14619e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.228 sec. to    1.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.534878     ( -1.05957   0.740117 )
Epeak [keV] : 131.194      ( -51.502 -131.194 )
Norm@50keV  : 2.92007E-02    ( -0.0135784   0.0564217 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.45     using 59 bins.
 Reduced chi-squared = 0.758036
# Null hypothesis probability of 9.09e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.72194 ( -0.23432  0.23305 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50702e-07 ( -2.27138e-08  2.24789e-08 ) ergs/cm2

Band function

Time interval is from    0.228 sec. to    1.228 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]    : 19.4989  (-2.90866  3.57113)
R^2/D10^2   : 9.14073E-02  (-0.0386581   0.0639961)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.00     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.33e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.766e-09   1.680e-09
25- 50  3.313e-08   6.860e-09
50-150  9.302e-08   2.069e-08
15-150  1.329e-07   2.425e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-35.2263      -200)
Norm        : 7.23987       (-0.932426     0.932426)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.69     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.37e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.802e-08   1.020e-08
25- 50  3.467e-08   1.970e-08
50-150  7.604e-08   4.169e-08
15-150  1.287e-07   7.130e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.0654        (-9.05142      -10.0402)
R1^2/D10^2  : 0.413613        (-0.293968      -0.416798)
kT2 [keV]   : 31.8694        (-30.7643      -31.7549)
R2^2/D10^2  : 1.38767E-02    (-0.0133345   0.0957521)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.17     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.76e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.224e-08   5.090e-09
25- 50  2.972e-08   8.060e-09
50-150  9.951e-08   2.512e-08
15-150  1.415e-07   3.325e-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: 1.45963     ( -0.109108   0.109923 )
Norm@50keV  : 3.83108E-03    ( -0.000243687   0.000242956 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.00e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 50.04 sec: 0.473266 ( -0.0298477  0.0298794 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.83127e-06 ( -1.2897e-07  1.29937e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.764330     ( -0.525364   0.468599 )
Epeak [keV] : 89.5597      ( -19.4312 77.8727 )
Norm@50keV  : 8.50234E-03    ( -0.00346894   0.00679325 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.36     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.99e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 50.04 sec: 0.456749 ( -0.031808  0.031754 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.73445e-06 ( -1.44165e-07  1.45241e-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)  = 1.47e-06
S(50-100 keV) = 1.84e-06

T90 vs. Hardness ratio plot

T90                                   = 228.531999945641 sec.
Hardness ratio (energy fluence ratio) = 1.2517

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.29502
Count Ratio (50-100 keV) / (15-25 keV) = 0.806423

Mask shadow pattern

IMX = 2.670204085641351E-01, IMY = 8.760484207718193E-02

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:
-239.360000 -38.296000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
306.6117  -1.8629    2.4  52.7  -26.6   7.8640   4.8 ------	UNKNOWN                       
252.3222 -59.7813    2.4  46.3 -126.3   6.5103   4.8 ------	UNKNOWN

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

Time interval of the image:
-38.296000 11.740590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0534 -34.4140    0.5  15.7  -18.2   2.9078  22.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
59.940600 327.940600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
285.2359 -24.8363    0.0  36.5  -79.9   0.1075   0.1   12.0	HT1900.1-2455                 
 20.3348 -45.8088    2.7  42.2  128.7   8.0505   4.2 ------	UNKNOWN                       
 24.3125 -72.8575    3.8  48.1  166.4   5.3828   3.1 ------	UNKNOWN                       
325.9948 -34.4317    1.2   0.0 -142.2   4.6936   9.9 ------	UNKNOWN                       
322.1972 -28.9872    2.4   6.3  -26.0   2.2820   4.9 ------	UNKNOWN                       
301.7506 -21.8636    2.5  24.7  -59.8   2.7218   4.6 ------	UNKNOWN                       
282.0081 -63.3444    2.5  39.5 -144.6   3.3616   4.5 ------	UNKNOWN

Plot creation:
Wed Jun 14 13:54:13 EDT 2023