batgrbproduct analysis for trigger=1167973

batgrbproduct Analysis for Trigger=1167973

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): Fri Oct 13 22:02:14 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1167973
======================================================================

  Trigger: 01167973      Segment: 000

  BAT Trigger Time: 705413219.84   [s; MET]
      Trigger Stop: 705413220.864   [s; MET]
               UTC: 2023-05-10T12:06:28.582740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 318.155739208481   Dec: 34.4426846404614  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.66
     Image Trigger?:     NO
     Rate S/N Ratio:     21.7485631709315  [ if not an image trigger ]
     Image S/N Ratio:    10.66

  Flight Position:   [ source = BAT ]
    RA: 318.155739208481   Dec: 34.4426846404614  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 318.136041854508   Dec: 34.4342091674516  [deg; J2000]  
        { 21h 12m 32.7s , +34d 26' 03.2" }
         +/- 0.876726902986284 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.234886008920805 [arcmin] (formal 1-sigma fit error)
    SNR: 36.7063127697341
 
  Angular difference between Flight and Ground position is 1.099387 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 178.367999911308 +/- 6.93123251560823
        Measured from: -138.976000070572
                   to: 39.3919998407364     [s; relative to TRIGTIME]
     T50: 22.7199999094009 +/- 5.63090894757922
        Measured from: -1.37600004673004
                   to: 21.3439998626709     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 15.8839999437332     
                   to: 16.8839999437332     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -145.632000088692     
                   to: 56.095999956131     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.018531   6.165685   4.935458   1.168790
           0.269637   0.280848   0.241296   0.198083 [error]
 Peak      0.204935   0.274253   0.234908   0.065214
           0.013268   0.014622   0.013485   0.009948 [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 1.63e-06 2.76e-06 3.55e-06 9.20e-06 1.05e-05 1.71e-05   erg/cm2
              Error 1.45e-07 1.41e-07 2.41e-07 1.38e-06 5.63e-07 1.55e-06   erg/cm2
Peak flux Power-law 1.72e+00 1.91e+00 1.52e+00 1.99e+00 5.88e+00 7.14e+00   ph/cm2/s
              Error 1.85e-01 1.23e-01 1.08e-01 3.04e-01 3.44e-01 4.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.64e-06 2.74e-06 3.53e-06 1.01e-05 1.05e-05 1.68e-05   erg/cm2
              Error 1.57e-07 1.56e-07 2.41e-07 -------- 6.17e-07 2.38e-06   erg/cm2
Peak flux Cutoff-PL 1.72e+00 1.91e+00 1.51e+00 2.04e+00 5.89e+00 7.20e+00   ph/cm2/s
              Error 1.87e-01 1.28e-01 1.19e-01 4.28e-01 3.57e-01 6.29e-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    1.635    0.094    -      -           5.57e-03 2.79e-04   67.970 57
CPL   1.633    0.188    10000.0    0.0      5.58e-03 2.75e-04   67.980 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.334    0.105    -      -           4.90e-02 2.83e-03   51.480 57
CPL   1.322    0.233    9978.3    0.0      4.96e-02 1.28e-02   51.560 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: 44.352000 sec.
T50 in the 50-300 keV band: 15.104000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  201.728 -145.632   56.096
T90   178.368 -138.976   39.392
T50    22.720   -1.376   21.344
Peak    1.000   15.884   16.884

Click here for the BAT GCN circular template

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

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  318.1360    34.4342   0.0052     8.6178   -17.2314         6.4120871     36.706 TRIG_01167973                 
 
Foreground time interval of the image:
-32.939  11.461 (delta_t =  44.400 [sec])
Background time interval of the image:

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

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)

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 -145.632 sec. to   56.096 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63502     ( -0.0935679   0.0945728 )
Norm@50keV  : 5.57112E-03    ( -0.000279858   0.000278728 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.97     using 59 bins.
 Reduced chi-squared = 1.19246
# Null hypothesis probability of 1.52e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 201.7 sec: 0.723927 ( -0.036862  0.037001 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04685e-05 ( -5.6099e-07  5.64018e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -145.632 sec. to   56.096 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63318     ( -0.260268   0.11489 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 5.58324E-03    ( -0.000281024   0.000269058 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.98     using 59 bins.
 Reduced chi-squared = 1.21393
# Null hypothesis probability of 1.31e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 201.7 sec: 0.725923 ( -0.043466  0.038627 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04951e-05 ( -6.42588e-07  5.90695e-07 ) ergs/cm2

Band function

Time interval is from -145.632 sec. to   56.096 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]    : 14.9341  (  )
R^2/D10^2   : 7.74366E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  184.26     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.52e-15 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.298e-07   7.160e-08
25- 50  2.888e-06   1.916e-07
50-150  4.375e-06   3.832e-07
15-150  7.993e-06   4.891e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 177.167       (-41.6861      -177.302)
Norm        : 2.91254       (-0.158202     0.174754)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   72.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.19e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.484e-06   1.078e-07
25- 50  2.814e-06   3.721e-07
50-150  5.925e-06   1.898e-06
15-150  1.022e-05   2.372e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.76590        (-0.716118      0.885076)
R1^2/D10^2  : 3.55468        (-1.83691      4.01196)
kT2 [keV]   : 21.5127        (-2.16201      2.8138)
R2^2/D10^2  : 1.85334E-02    (-0.00669628   0.00880646)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.25     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.37e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.757e-06   3.639e-07
25- 50  2.518e-06   2.965e-07
50-150  5.856e-06   7.655e-07
15-150  1.013e-05   1.078e-06

Peak spectrum fit

Power-law model

Time interval is from   15.884 sec. to   16.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33400     ( -0.104483   0.104631 )
Norm@50keV  : 4.90013E-02    ( -0.00283176   0.0028252 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.48     using 59 bins.
 Reduced chi-squared = 0.903158
# Null hypothesis probability of 6.81e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 5.88425 ( -0.34357  0.34401 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.80386e-07 ( -3.14132e-08  3.16258e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   15.884 sec. to   16.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32169     ( -0.359534   0.10621 )
Epeak [keV] : 9978.30      ( -9999.34 -9999.34 )
Norm@50keV  : 4.96448E-02    ( -0.00284154   0.02284 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.56     using 59 bins.
 Reduced chi-squared = 0.920714
# Null hypothesis probability of 6.43e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 5.89159 ( -0.36602  0.34858 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81271e-07 ( -3.59533e-08  3.24768e-08 ) ergs/cm2

Band function

Time interval is from   15.884 sec. to   16.884 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]    : 17.2127  (  )
R^2/D10^2   : 0.420663  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  134.81     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.00e-08 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.529e-08   2.890e-09
25- 50  1.130e-07   9.250e-09
50-150  2.400e-07   2.665e-08
15-150  3.784e-07   3.020e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-15.8296      -200)
Norm        : 24.2022       (-1.39347     1.39347)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.48     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.06e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.028e-08   3.755e-09
25- 50  1.160e-07   7.750e-09
50-150  2.543e-07   5.830e-08
15-150  4.305e-07   6.460e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.06015        (-1.22939      1.39636)
R1^2/D10^2  : 5.58109        (-2.51497      5.41868)
kT2 [keV]   : 31.0027        (-5.11438      8.36609)
R2^2/D10^2  : 5.06054E-02    (-0.0267212   0.0418981)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.68     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.40e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.254e-08   1.302e-08
25- 50  1.094e-07   1.878e-08
50-150  3.229e-07   7.400e-08
15-150  4.848e-07   7.660e-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: 1.43630     ( -0.065243   0.0652631 )
Norm@50keV  : 8.69622E-03    ( -0.000299266   0.000299194 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.73e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 44.4 sec: 1.06809 ( -0.0393584  0.0395052 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.7043e-06 ( -1.38079e-07  1.38447e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31787     ( -0.262263   0.155772 )
Epeak [keV] : 312.297      ( -312.297 -312.297 )
Norm@50keV  : 9.87335E-03    ( -0.00140809   0.00310578 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.27     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.64e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 44.4 sec: 1.05942 ( -0.04301  0.02151 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.67523e-06 ( -1.53304e-07  1.4426e-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)  = 2.76e-06
S(50-100 keV) = 3.55e-06

T90 vs. Hardness ratio plot

T90                                   = 178.367999911308 sec.
Hardness ratio (energy fluence ratio) = 1.28623

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.02445
Count Ratio (50-100 keV) / (15-25 keV) = 0.820044

Mask shadow pattern

IMX = 1.447515832337387E-01, IMY = 4.489497646591305E-02

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:
-32.939400 11.460600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4928  35.4718    4.3  44.0  127.5  -2.3031  -2.7    7.9	Her X-1                       
288.9273  11.0207    8.5  35.7   64.8   0.4793   1.4    8.8	GRS 1915+105                  
299.5427  35.2115    1.6  10.7   86.6   1.2347   7.3    2.4	Cyg X-1                       
308.2082  40.9131    6.3   2.1  114.4   0.2932   1.8    5.0	Cyg X-3                       
325.9936  38.2874    8.9  11.8  -56.1  -0.2132  -1.3    8.6	Cyg X-2                       
299.4753  15.6480    2.5  27.3   50.5   0.8664   4.5 ------	UNKNOWN                       
318.1361  34.4342    0.3   8.6  -17.2   6.4121  36.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
51.060600 782.430000
900.160000 934.860600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.8158  11.0724    7.3  35.5   70.3  -2.9087  -1.6    7.7	GRS 1915+105                  
299.5309  35.1887    1.0  15.3  112.5  11.2988  11.2    3.0	Cyg X-1                       
307.9130  40.9282   10.4  10.4  146.1   1.0255   1.1    9.1	Cyg X-3                       
325.9576  38.4126   13.0   7.4 -110.2  -0.8684  -0.9   11.5	Cyg X-2                       
286.5464  19.6293    2.8  31.6   84.7   6.3829   4.1 ------	UNKNOWN                       
308.9518  -8.9020    3.7  44.2   27.5   4.3989   3.1 ------	UNKNOWN

Plot creation:
Fri Oct 13 22:20:24 EDT 2023