batgrbproduct analysis for trigger=1164180

batgrbproduct Analysis for Trigger=1164180

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 15:02:18 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1164180
======================================================================

  Trigger: 01164180      Segment: 000

  BAT Trigger Time: 703181692.352   [s; MET]
      Trigger Stop: 703181700.544   [s; MET]
               UTC: 2023-04-14T16:14:21.246980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 181.071398844   Dec: 53.1268747077817  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.77
     Image Trigger?:     NO
     Rate S/N Ratio:     11.4891252930761  [ if not an image trigger ]
     Image S/N Ratio:    7.77

  Flight Position:   [ source = BAT ]
    RA: 181.071398844   Dec: 53.1268747077817  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 181.027130344276   Dec: 53.1921010010707  [deg; J2000]  
        { 12h 04m 06.5s , +53d 11' 31.6" }
         +/- 2.46760884578931 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.27389067923357 [arcmin] (formal 1-sigma fit error)
    SNR: 8.36996495081363
 
  Angular difference between Flight and Ground position is 4.225208 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 29.0599999427795 +/- 7.74073911085516
        Measured from: -0.0679999589920044
                   to: 28.9919999837875     [s; relative to TRIGTIME]
     T50: 12.539999961853 +/- 8.64171837297098
        Measured from: 2.67999994754791
                   to: 15.2199999094009     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 9.30400002002716     
                   to: 10.3040000200272     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.519999980926514     
                   to: 35.2239999771118     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.215802   0.368472   0.166028   0.070017
           0.051725   0.053556   0.045742   0.038748 [error]
 Peak      0.035608   0.025856   0.013699   0.008081
           0.008796   0.009297   0.007896   0.006912 [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 7.11e-08 1.23e-07 1.62e-07 4.32e-07 4.72e-07 7.86e-07   erg/cm2
              Error 2.09e-08 2.34e-08 4.48e-08 2.52e-07 1.07e-07 2.92e-07   erg/cm2
Peak flux Power-law 3.19e-01 2.05e-01 8.50e-02 4.80e-02 6.33e-01 6.57e-01   ph/cm2/s
              Error 1.18e-01 7.01e-02 4.79e-02 5.40e-02 2.04e-01 2.15e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.11e-08 1.22e-07 1.61e-07 4.43e-07 4.75e-07 7.26e-07   erg/cm2
              Error 2.07e-08 2.38e-08 4.70e-08 2.16e-07 1.10e-07 3.79e-07   erg/cm2
Peak flux Cutoff-PL 2.86e-01 2.78e-01 7.95e-02 4.46e-03 6.49e-01 6.48e-01   ph/cm2/s
              Error 1.32e-01 1.03e-01 7.53e-02 2.52e-02 2.00e-01 2.00e-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    1.604    0.337    -      -           1.41e-03 2.94e-04   67.160 57
CPL   1.602    1.348    9998.8    0.0      1.42e-03 7.14e-03   67.160 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.264    0.551    -      -           3.70e-03 1.67e-03   56.950 57
CPL  -0.033    3.265      34.3   26.3      9.43e-02 8.32e+01   53.690 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: 7.552000 sec.
T50 in the 50-300 keV band: 4.096000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   35.744   -0.520   35.224
T90    29.060   -0.068   28.992
T50    12.540    2.680   15.220
Peak    1.000    9.304   10.304

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
  181.0271    53.1921   0.0229    20.4094   130.6616         0.8835266      8.370 TRIG_01164180                 
 
Foreground time interval of the image:
 -0.520  35.224 (delta_t =  35.744 [sec])
Background time interval of the image:
-239.352  -0.520 (delta_t = 238.832 [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 8.192000

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 8.192000

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 8.192000

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   -0.520 sec. to   35.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60371     ( -0.333233   0.340591 )
Norm@50keV  : 1.41373E-03    ( -0.000298027   0.000290366 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.16     using 59 bins.
 Reduced chi-squared = 1.17825
# Null hypothesis probability of 1.68e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 35.74 sec: 0.181886 ( -0.034614  0.034627 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72383e-07 ( -1.05274e-07  1.08308e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.520 sec. to   35.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60199     ( -1.57673   1.11981 )
Epeak [keV] : 9998.81      ( -9999.18 -9999.18 )
Norm@50keV  : 1.41703E-03    ( -0.000300072   0.0139895 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.16     using 59 bins.
 Reduced chi-squared = 1.19929
# Null hypothesis probability of 1.46e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 35.74 sec: 0.181945 ( -0.034777  0.034569 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.73626e-07 ( -1.35379e-07  8.47724e-08 ) ergs/cm2

Band function

Time interval is from   -0.520 sec. to   35.224 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]    : 10.2915  (-2.13978  3.06151)
R^2/D10^2   : 7.81238E-02  (-0.0482982   0.108046)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   73.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.34e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.078e-08   2.124e-08
25- 50  1.573e-07   5.273e-08
50-150  8.917e-08   4.509e-08
15-150  3.073e-07   9.553e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 153.940       (-92.1638      -158.27)
Norm        : 0.747755       (-0.150359     0.214087)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.39     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.63e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.848e-08   3.935e-08
25- 50  1.274e-07   7.039e-08
50-150  2.542e-07   1.558e-07
15-150  4.501e-07   2.607e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.27709        (-1.82286      2.28496)
R1^2/D10^2  : 0.156678        (-0.0817646      0.140411)
kT2 [keV]   : 200.000        (-172.074      -200)
R2^2/D10^2  : 2.64328E-05    (-1.17362e-05   0.000125308)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.77     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.47e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.300e-08   4.044e-08
25- 50  1.407e-07   7.510e-08
50-150  2.943e-07   1.723e-07
15-150  5.080e-07   2.339e-07

Peak spectrum fit

Power-law model

Time interval is from    9.304 sec. to   10.304 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26395     ( -0.476328   0.6252 )
Norm@50keV  : 3.69730E-03    ( -0.00168637   0.00165098 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.95     using 59 bins.
 Reduced chi-squared = 0.999123
# Null hypothesis probability of 4.77e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.633270 ( -0.203646  0.204315 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.50332e-08 ( -1.33776e-08  1.42433e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    9.304 sec. to   10.304 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.33650E-02     ( -4.50003   2.02906 )
Epeak [keV] : 34.3059      ( -34.3409 18.3305 )
Norm@50keV  : 9.42711E-02    ( -0.0941262   166.324 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.69     using 59 bins.
 Reduced chi-squared = 0.95875
# Null hypothesis probability of 5.63e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.648766 ( -0.198458  0.200815 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from    9.304 sec. to   10.304 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]    : 8.75081  (-2.70401  3.5214)
R^2/D10^2   : 0.556663  (-0.555902   1.74177)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.38     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.74e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.174e-09   5.010e-09
25- 50  1.662e-08   9.890e-09
50-150  5.813e-09   4.626e-09
15-150  3.061e-08   1.932e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 43.7740       (-21.7359      52.2317)
Norm        : 4.13295       (-1.62367     2.8934)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.55     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.67e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.763e-09   4.948e-09
25- 50  1.333e-08   8.307e-09
50-150  1.135e-08   9.105e-09
15-150  3.445e-08   2.118e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.25354        (-5.25339      7.00371)
R1^2/D10^2  : 2.12163        (-2.12147      -2.12147)
kT2 [keV]   : 12.5187        (-12.5175      -12.5175)
R2^2/D10^2  : 9.26554E-02    (-0.0927003   1.57274)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.38e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.342e-09   7.135e-09
25- 50  1.478e-08   9.635e-09
50-150  1.009e-08   6.695e-09
15-150  3.421e-08   2.065e-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: 1.60371     ( -0.333233   0.340591 )
Norm@50keV  : 1.41373E-03    ( -0.000298027   0.000290366 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.16     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.68e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 35.74 sec: 0.181880 ( -0.0346119  0.0346251 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.72318e-07 ( -1.05215e-07  1.08393e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60874     ( -0.340222   0.338016 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.41194E-03    ( -0.000298013   0.0118906 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.16     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.46e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 35.74 sec: 0.181916 ( -0.035856  0.034536 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.73626e-07 ( -1.33792e-07  1.05608e-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)  = 1.23e-07
S(50-100 keV) = 1.62e-07

T90 vs. Hardness ratio plot

T90                                   = 29.0599999427795 sec.
Hardness ratio (energy fluence ratio) = 1.31707

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.70745
Count Ratio (50-100 keV) / (15-25 keV) = 0.769353

Mask shadow pattern

IMX = -2.424463437888354E-01, IMY = -2.822522106552625E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 8.192000

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:
-239.352000 -0.520000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4565  35.3494    4.1  42.2   17.6   1.3375   2.8    0.4	Her X-1                       
204.3499  37.8068    2.4  31.6   84.7   3.2460   4.7 ------	UNKNOWN                       
215.6170  59.7869    2.7  10.0   57.1   1.5057   4.3 ------	UNKNOWN                       
282.4145  37.3379    2.5  49.9  -12.1   2.9838   4.6 ------	UNKNOWN                       
251.3616  84.0397    2.3  16.8  -87.0   2.1626   4.9 ------	UNKNOWN                       
291.4232  44.2870    2.7  46.9  -24.4   3.0628   4.3 ------	UNKNOWN                       
 32.5872  72.1868    3.4  38.5 -103.3   4.3240   3.4 ------	UNKNOWN                       
 79.4618  54.1716    2.6  51.0 -137.1   8.0364   4.4 ------	UNKNOWN                       
335.9958  63.0035    2.9  42.7  -69.2   5.7650   4.0 ------	UNKNOWN

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

Time interval of the image:
-0.520000 35.224000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4728  35.2907   10.5  42.3   17.6   0.1754   1.1    3.2	Her X-1                       
154.9408  30.0857    2.3  49.3  145.0   2.0783   4.9 ------	UNKNOWN                       
181.0271  53.1921    1.4  20.4  130.7   0.8837   8.4 ------	UNKNOWN                       
291.5811  49.6258    2.3  42.3  -28.4   0.7708   5.1 ------	UNKNOWN                       
314.7229  63.2811    2.3  37.8  -56.5   0.9214   5.0 ------	UNKNOWN                       
 65.8581  63.6389    2.0  44.5 -124.0   2.1315   5.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
111.148630 962.768000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4665  35.2940    3.6  53.0   12.2   6.7177   3.2    2.9	Her X-1                       
234.2373  22.6373    2.9  50.2   39.8  12.1938   4.0 ------	UNKNOWN                       
197.2696  24.0234    2.8  31.6   84.7   8.9850   4.1 ------	UNKNOWN                       
193.4065  46.9192    2.6  10.0   57.1   5.1528   4.5 ------	UNKNOWN                       
 67.0887  81.0806    3.8  41.2  -78.7  13.7538   3.1 ------	UNKNOWN

Plot creation:
Fri Jun 16 09:09:20 EDT 2023