batgrbproduct analysis for trigger=1143281

batgrbproduct Analysis for Trigger=1143281

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Mon Dec  5 15:57:13 EST 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1143281/GCN5_download_cron
======================================================================

  Trigger: 01143281      Segment: 000

  BAT Trigger Time: 691843536   [s; MET]
      Trigger Stop: 691843600   [s; MET]
               UTC: 2022-12-04T10:45:05.667180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 299.528603521558   Dec: 35.0051352734535  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.88
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.88

  Flight Position:   [ source = BAT ]
    RA: 299.528603521558   Dec: 35.0051352734535  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 299.558463091143   Dec: 35.0830937531613  [deg; J2000]  
        { 19h 58m 14.0s , +35d 04' 59.1" }
         +/- 1.96667043860309 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.900450476370348 [arcmin] (formal 1-sigma fit error)
    SNR: 11.5744889068378
 
  Angular difference between Flight and Ground position is 4.902095 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 458.452000021935 +/- 55.8676389554337
        Measured from: -129.183999896049
                   to: 329.268000125885     [s; relative to TRIGTIME]
     T50: 222.463999986649 +/- 63.9288376914239
        Measured from: -3.93599987030029
                   to: 218.528000116348     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 54.8880000114441     
                   to: 55.8880000114441     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -148.692000031471     
                   to: 345.863999962807     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.157592   3.909747   1.628451   0.651459
           0.200984   0.204580   0.177952   0.164195 [error]
 Peak      0.042635   0.015500   0.023942   0.014794
           0.010209   0.010476   0.009313   0.008357 [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 1.47e-06 1.68e-06 1.37e-06 1.87e-06 5.21e-06 6.40e-06   erg/cm2
              Error 1.39e-07 1.08e-07 1.71e-07 4.62e-07 3.81e-07 6.52e-07   erg/cm2
Peak flux Power-law 2.23e-01 2.21e-01 1.54e-01 1.70e-01 6.66e-01 7.69e-01   ph/cm2/s
              Error 2.06e-01 9.96e-02 8.14e-02 2.26e-01 2.60e-01 2.88e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.47e-06 1.69e-06 1.37e-06 1.72e-06 5.18e-06 6.24e-06   erg/cm2
              Error 1.48e-07 1.28e-07 1.83e-07 9.73e-07 4.43e-07 1.03e-06   erg/cm2
Peak flux Cutoff-PL 2.66e-01 2.28e-01 1.36e-01 1.31e-01 6.79e-01 7.66e-01   ph/cm2/s
              Error 2.10e-01 1.02e-01 8.47e-02 2.46e-01 2.69e-01 3.01e-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    2.292    0.138    -      -           1.10e-03 9.73e-05   33.510 57
CPL   1.988    0.000       1.6   11.9      1.65e-03 0.00e+00   34.170 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.520    0.963    -      -           5.30e-03 2.17e-03   49.340 57
CPL   4.005    1.766     473.6    0.0      4.50e-04 0.00e+00   47.450 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  494.556 -148.692  345.864
T90   458.452 -129.184  329.268
T50   222.464   -3.936  218.528
Peak    1.000   54.888   55.888

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  299.5585 +35.0831 0.0167   37.3 -171.0       5.8591    11.6  TRIG_01143281       
------------------------------------------
 
Foreground time interval of the image:
-143.999  70.201 (delta_t = 214.200 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from -148.692 sec. to  345.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.29216     ( -0.135057   0.140435 )
Norm@50keV  : 1.10299E-03    ( -9.81406e-05   9.65568e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.51 using 59 PHA bins.
# Reduced chi-squared =         0.5880 for     57 degrees of freedom 
# Null hypothesis probability =   9.944561e-01
 
Photon flux (15-150 keV)    in 494.6 sec: 0.191920 ( -0.012459  0.0124887 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.20576e-06 ( -3.7821e-07  3.83077e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -148.692 sec. to  345.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98827     ( -1.98827   -1.98827 )
Epeak [keV] : 1.57907      ( -0.528476 23.2031 )
Norm@50keV  : 1.65168E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.17 using 59 PHA bins.
# Reduced chi-squared =         0.6101 for     56 degrees of freedom 
# Null hypothesis probability =   9.906304e-01
 
Photon flux (15-150 keV)    in 494.6 sec: 0.191450 ( -0.013447  0.012836 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.18168e-06 ( -4.82903e-07  4.02456e-07 ) ergs/cm2

Band function

Time interval is from -148.692 sec. to  345.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.425276   ( 1.30619   1.30619 )
beta        : -2.37307    ( 2.37773   0.19113 )
Epeak [keV] : 21.1945      ( -19.9347 7.7303 )
Norm@50keV   : 2.70228E-02    ( -0.0267541   449.31 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.36 using 59 PHA bins.
# Reduced chi-squared =         0.5884 for     55 degrees of freedom 
# Null hypothesis probability =   9.935976e-01
 
Photon flux (15-150 keV)    in 494.6 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]    : 8.36150  (-0.66179  0.720146)
R^2/D10^2   : 0.165292  (-0.0474775   0.0671274)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.50 using 59 PHA bins.
# Reduced chi-squared =          1.553 for     57 degrees of freedom 
# Null hypothesis probability =   4.740117e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.066e-06   1.222e-07
25- 50  2.012e-06   1.669e-07
50-150  6.096e-07   1.305e-07
15-150  3.687e-06   2.787e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 44.0135       (-7.40857      9.60996)
Norm        : 1.13747       (-0.148583     0.177445)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.331e-06   1.222e-07
25- 50  1.822e-06   1.286e-07
50-150  1.560e-06   3.099e-07
15-150  4.713e-06   3.722e-07

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.51928        (-0.955808      1.02248)
R1^2/D10^2  : 0.729124        (-0.339682      0.776843)
kT2 [keV]   : 20.0777        (-5.23545      11.02)
R2^2/D10^2  : 3.26040E-03    (-0.00250292   0.00781613)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.407e-06   2.649e-07
25- 50  1.685e-06   3.569e-07
50-150  1.936e-06   1.026e-06
15-150  5.028e-06   1.394e-06

Peak spectrum fit

Power-law model

Time interval is from   54.888 sec. to   55.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52033     ( -0.945828   0.980233 )
Norm@50keV  : 5.30487E-03    ( -0.0023289   0.00200278 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.34 using 59 PHA bins.
# Reduced chi-squared =         0.8656 for     57 degrees of freedom 
# Null hypothesis probability =   7.546846e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.666032 ( -0.256934  0.262234 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.01449e-08 ( -2.17795e-08  2.15152e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   54.888 sec. to   55.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.00543     ( -2.99396   0.538617 )
Epeak [keV] : 473.627      (   )
Norm@50keV  : 4.49608E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.45 using 59 PHA bins.
# Reduced chi-squared =         0.8474 for     56 degrees of freedom 
# Null hypothesis probability =   7.849495e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.679353 0.666736 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87468e-08 ( -2.01069e-08  2.30576e-08 ) ergs/cm2

Band function

Time interval is from   54.888 sec. to   55.888 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.22558   ( 1.22596   1.22596 )
beta        : -1.51916    ( 1.52124   0.945721 )
Epeak [keV] : 26.9054      ( -26.9718 -26.9718 )
Norm@50keV   : 1.13482E-02    ( -0.0113655   0.257867 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.34 using 59 PHA bins.
# Reduced chi-squared =         0.8971 for     55 degrees of freedom 
# Null hypothesis probability =   6.898294e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 22.8318  (-18.7333  -23.1865)
R^2/D10^2   : 1.62298E-02  (-0.0149291   24.2106)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.085e-08   6.850e-09
25- 50  6.387e-09   4.077e-09
50-150  2.115e-10   2.745e-10
15-150  1.745e-08   1.081e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-199.362      -199.362)
Norm        : 2.67625       (-1.0138     1.0157)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.664e-09   4.250e-09
25- 50  1.282e-08   8.135e-09
50-150  2.812e-08   1.747e-08
15-150  4.760e-08   3.047e-08

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.10863        (-1.80191      2.02839)
R1^2/D10^2  : 10.2971        (-9.70773      253.971)
kT2 [keV]   : 83.8990        (-65.0978      -86.1306)
R2^2/D10^2  : 5.51279E-04    (-0.000450719   0.0184798)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.092e-08   6.935e-09
25- 50  6.327e-09   3.623e-09
50-150  3.923e-08   2.485e-08
15-150  5.648e-08   3.058e-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: 2.25448     ( -0.202135   0.215436 )
Norm@50keV  : 1.07477E-03    ( -0.000161628   0.000158745 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.63 using 59 PHA bins.
# Reduced chi-squared =         0.8004 for     57 degrees of freedom 
# Null hypothesis probability =   8.604183e-01
 
Photon flux (15-150 keV)    in 214.2 sec: 0.183186 ( -0.0187  0.0187011 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.18259e-06 ( -2.71959e-07  2.79343e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89653     ( -1.18335   0.0916398 )
Epeak [keV] : 10.4963      (   )
Norm@50keV  : 1.81106E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.19 using 59 PHA bins.
# Reduced chi-squared =         0.8070 for     56 degrees of freedom 
# Null hypothesis probability =   8.487963e-01
 
Photon flux (15-150 keV)    in 214.2 sec: 0.180955 ( -0.019543  0.019488 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08255e-06 ( -3.57774e-07  3.56266e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99320   ( -5.55512   -4.9932 )
beta        : -2.55746    ( -0.421384   0.29204 )
Epeak [keV] : 22.2860      ( -3.7247 2.80993 )
Norm@50keV   : 486.581    ( -49.0242   1214.88 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.09 using 59 PHA bins.
# Reduced chi-squared =         0.7108 for     55 degrees of freedom 
# Null hypothesis probability =   9.483126e-01
 
Photon flux (15-150 keV)    in 214.2 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)  = 1.68e-06
S(50-100 keV) = 1.37e-06

T90 vs. Hardness ratio plot

T90                                   = 458.452000021935 sec.
Hardness ratio (energy fluence ratio) = 0.815476

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.940387
Count Ratio (50-100 keV) / (15-25 keV) = 0.391681

Mask shadow pattern

IMX = -7.536063648928708E-01, IMY = 1.199777000842203E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:

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

Time interval of the image:
-143.999410 70.200600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6099  35.3278    3.8  12.4  -93.6   1.2142   3.1    7.5	Her X-1                       
288.7932  10.8183   14.4  48.1 -135.3   1.0531   0.8    7.6	GRS 1915+105                  
299.5594  35.0851    1.0  37.3 -171.0   5.8634  11.6    7.2	Cyg X-1                       
308.1030  40.9329   23.2  40.0  175.4   0.2837   0.5    1.2	Cyg X-3                       
326.0732  38.3020    4.5  53.1  168.3   4.3829   2.6    4.8	Cyg X-2                       
193.3536  56.5416    2.8  35.8   44.1   2.6666   4.2 ------	UNKNOWN                       
311.6318  27.8913    2.2  49.9 -171.8   5.4608   5.2 ------	UNKNOWN                       
229.4236  26.0306    2.2  27.8  -35.5   2.4140   5.3 ------	UNKNOWN                       
228.2939  11.8192    2.2  40.8  -46.0   3.5521   5.3 ------	UNKNOWN                       
300.4013  13.7271    2.5  52.5 -149.4   5.0573   4.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
155.800600 693.090000
722.000000 785.250000
786.000000 786.890000
788.000000 788.130000
811.000000 811.260000
812.000000 872.840000
883.000000 899.390000
901.000000 902.280000
903.000000 924.000580
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6083  35.2494   35.0  36.4  -32.8   0.4783   0.3    9.3	Her X-1                       
288.6698  11.0123   13.9  26.1 -111.4   0.9582   0.8    8.6	GRS 1915+105                  
299.5945  35.2098    0.6   0.1   44.5  20.9571  19.3    0.5	Cyg X-1                       
308.0523  40.9557    1.9   8.9   89.7   6.6075   6.1    2.6	Cyg X-3                       
326.2373  38.5126    6.4  21.5  116.6  -2.3649  -1.8   11.9	Cyg X-2                       
281.6154  65.3414    2.2  32.1   29.5   8.0618   5.3 ------	UNKNOWN                       
265.5371  35.5340    2.4  27.7  -35.5   6.0265   4.8 ------	UNKNOWN                       
252.2366  18.7501    2.2  44.8  -55.1  17.6576   5.2 ------	UNKNOWN

Plot creation:
Mon Dec  5 16:01:02 EST 2022