batgrbproduct analysis for trigger=1165948

batgrbproduct Analysis for Trigger=1165948

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 14:58:35 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1165948
======================================================================

  Trigger: 01165948      Segment: 000

  BAT Trigger Time: 704284343.168   [s; MET]
      Trigger Stop: 704284345.216   [s; MET]
               UTC: 2023-04-27T10:31:51.987820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 153.324167550389   Dec: 48.1798072225164  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.8
     Image Trigger?:     NO
     Rate S/N Ratio:     11.0453610171873  [ if not an image trigger ]
     Image S/N Ratio:    6.8

  Flight Position:   [ source = BAT ]
    RA: 153.324167550389   Dec: 48.1798072225164  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 153.381479790343   Dec: 48.2611435826414  [deg; J2000]  
        { 10h 13m 31.6s , +48d 15' 40.1" }
         +/- 3.25058011442226 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.27794152516293 [arcmin] (formal 1-sigma fit error)
    SNR: 5.64606277573643
 
  Angular difference between Flight and Ground position is 5.391230 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 6.33599996566772 +/- 2.57253184686787
        Measured from: -0.159999966621399
                   to: 6.17599999904633     [s; relative to TRIGTIME]
     T50: 2.92800009250641 +/- 2.20428666050985
        Measured from: 0.399999976158142
                   to: 3.32800006866455     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.251999974250793     
                   to: 0.748000025749207     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.51199996471405     
                   to: 6.44800007343292     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.146400   0.088468   0.044883  -0.003628
           0.024014   0.023974   0.020622   0.017676 [error]
 Peak      0.040060   0.032880   0.025109   0.005893
           0.009392   0.009701   0.008432   0.006991 [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 3.00e-08 3.90e-08 3.70e-08 6.24e-08 1.27e-07 1.68e-07   erg/cm2
              Error 9.98e-09 1.06e-08 1.83e-08 6.19e-08 4.25e-08 8.43e-08   erg/cm2
Peak flux Power-law 2.75e-01 2.28e-01 1.28e-01 1.07e-01 6.79e-01 7.38e-01   ph/cm2/s
              Error 1.18e-01 7.19e-02 6.09e-02 9.78e-02 2.14e-01 2.39e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.99e-08 3.99e-08 3.62e-08 4.13e-08 1.24e-07 1.48e-07   erg/cm2
              Error 1.01e-08 1.27e-08 2.28e-08 -------- 4.49e-08 8.42e-08   erg/cm2
Peak flux Cutoff-PL 2.81e-01 3.00e-01 4.31e-03 7.19e-09 5.86e-01 5.86e-01   ph/cm2/s
              Error 1.37e-01 1.24e-01 8.23e-02 0.00e+00 1.94e-01 1.53e-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    2.073    0.517    -      -           1.97e-03 7.17e-04   78.010 57
CPL   1.937    0.000      17.1    0.0      2.40e-03 0.00e+00   77.970 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.828    0.538    -      -           4.87e-03 1.82e-03   64.150 57
CPL  -9.611    0.000      27.8    0.0      8.47e+05 0.00e+00   61.690 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    6.960   -0.512    6.448
T90     6.336   -0.160    6.176
T50     2.928    0.400    3.328
Peak    1.000   -0.252    0.748

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
  153.3815    48.2611   0.0340    13.6249   -76.8270         0.2560387      5.646 TRIG_01165948                 
 
Foreground time interval of the image:
 -0.512   6.448 (delta_t =   6.960 [sec])
Background time interval of the image:
-239.168  -0.512 (delta_t = 238.656 [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   -0.512 sec. to    6.448 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.07279     ( -0.478002   0.555557 )
Norm@50keV  : 1.96611E-03    ( -0.00073225   0.000701504 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.01     using 59 bins.
 Reduced chi-squared = 1.3686
# Null hypothesis probability of 3.38e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 6.96 sec: 0.305256 ( -0.078631  0.078658 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26849e-07 ( -4.09325e-08  4.41675e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.512 sec. to    6.448 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.93682     (     )
Epeak [keV] : 17.0736      (   )
Norm@50keV  : 2.40071E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   77.97     using 59 bins.
 Reduced chi-squared = 1.39232
# Null hypothesis probability of 2.78e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 6.96 sec: 0.305108 ( -0.078218  0.078862 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23589e-07 ( -4.96147e-08  4.02435e-08 ) ergs/cm2

Band function

Time interval is from   -0.512 sec. to    6.448 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]    : 7.19066  (-1.91607  2.85117)
R^2/D10^2   : 0.508752  (-0.507649   1.29954)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   80.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.08e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.022e-08   1.556e-08
25- 50  4.357e-08   2.805e-08
50-150  7.950e-09   7.034e-09
15-150  8.174e-08   4.889e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 52.7683       (-28.9626      116.332)
Norm        : 1.68542       (-0.627087     1.27327)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.25e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.902e-08   1.452e-08
25- 50  4.247e-08   2.156e-08
50-150  4.335e-08   3.124e-08
15-150  1.148e-07   5.658e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.59022        (-1.79676      2.37679)
R1^2/D10^2  : 1.19541        (-0.903923      4.68412)
kT2 [keV]   : 27.7523        (-27.702      -27.8805)
R2^2/D10^2  : 2.12446E-03    (-0.00204409   0.0416587)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   75.88     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.25e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.285e-08   1.941e-08
25- 50  3.752e-08   1.925e-08
50-150  6.398e-08   4.388e-08
15-150  1.343e-07   7.305e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.252 sec. to    0.748 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.82777     ( -0.513836   0.562772 )
Norm@50keV  : 4.87108E-03    ( -0.00185346   0.00179538 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.15     using 59 bins.
 Reduced chi-squared = 1.12544
# Null hypothesis probability of 2.40e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.678622 ( -0.213763  0.213766 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.48208e-08 ( -1.64253e-08  1.7524e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.252 sec. to    0.748 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.61081     (     )
Epeak [keV] : 27.8381      (   )
Norm@50keV  : 8.46582E+05    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.69     using 59 bins.
 Reduced chi-squared = 1.10161
# Null hypothesis probability of 2.80e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.585599 ( -0.180393  0.207004 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.49086e-08 ( -7.9929e-09  2.66772e-08 ) ergs/cm2

Band function

Time interval is from   -0.252 sec. to    0.748 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]    : 8.29453  (-2.10254  3.35455)
R^2/D10^2   : 0.694142  (-0.69414   1.47972)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.66     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.82e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.859e-09   5.320e-09
25- 50  1.649e-08   1.006e-08
50-150  4.871e-09   3.751e-09
15-150  3.022e-08   1.863e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 74.2880       (-44.5075      -74.288)
Norm        : 3.32894       (-1.24969     2.242)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.44     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.60e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.590e-09   5.270e-09
25- 50  1.388e-08   8.545e-09
50-150  1.862e-08   1.642e-08
15-150  4.109e-08   2.772e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.17910        (-7.19091      3.05323)
R1^2/D10^2  : 1.06577        (-1.06469      2.91773)
kT2 [keV]   : 36.5503        (-36.821      -36.821)
R2^2/D10^2  : 1.72113E-03    (-0.00170694   1.19652)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.82e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.368e-09   5.850e-09
25- 50  1.511e-08   9.555e-09
50-150  2.021e-08   1.175e-08
15-150  4.468e-08   2.203e-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: 2.07279     ( -0.478002   0.555557 )
Norm@50keV  : 1.96611E-03    ( -0.00073225   0.000701504 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.38e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 6.96 sec: 0.305231 ( -0.0786262  0.0786528 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.26827e-07 ( -4.0925e-08  4.40912e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05910     ( -0.86425   0.567403 )
Epeak [keV] : 9999.35      (   )
Norm@50keV  : 1.98812E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.76e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 6.96 sec: 0.303514 ( -0.079606  0.079683 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23617e-07 ( -4.9551e-08  4.66417e-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)  = 3.90e-08
S(50-100 keV) = 3.70e-08

T90 vs. Hardness ratio plot

T90                                   = 6.33599996566772 sec.
Hardness ratio (energy fluence ratio) = 0.948718

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.60429
Count Ratio (50-100 keV) / (15-25 keV) = 0.306578

Mask shadow pattern

IMX = 5.523776989566868E-02, IMY = 2.360075174023397E-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:
-239.168000 -0.512000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
193.5468  17.5873    2.3  31.6   84.7   3.7621   4.9 ------	UNKNOWN

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

Time interval of the image:
-0.512000 6.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
204.1236  15.0702    2.6  40.7   75.7   0.7325   4.5 ------	UNKNOWN                       
142.8362  -6.8745    2.3  50.0  172.4   0.5834   5.0 ------	UNKNOWN                       
153.3814  48.2611    2.0  13.6  -76.8   0.2561   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
77.332600 962.964500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.1996  29.0176    2.5  31.6   84.7  11.5015   4.6 ------	UNKNOWN                       
153.3234  14.8083    3.1  33.4  149.4   7.9548   3.7 ------	UNKNOWN                       
292.9662  70.5628    3.7  57.7  -15.8  15.5190   3.2 ------	UNKNOWN

Plot creation:
Fri Jun 16 09:07:28 EDT 2023