batgrbproduct analysis for trigger=1183217

batgrbproduct Analysis for Trigger=1183217

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 Sep 29 23:31:36 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1183217
======================================================================

  Trigger: 01183217      Segment: 000

  BAT Trigger Time: 712927462.848   [s; MET]
      Trigger Stop: 712927471.04   [s; MET]
               UTC: 2023-08-05T11:23:51.076980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 207.746617283295   Dec: 31.1848044696489  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.49
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6301458127346  [ if not an image trigger ]
     Image S/N Ratio:    8.49

  Flight Position:   [ source = BAT ]
    RA: 207.746617283295   Dec: 31.1848044696489  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 207.749701523998   Dec: 31.1945940784244  [deg; J2000]  
        { 13h 50m 59.9s , +31d 11' 40.5" }
         +/- 1.90434194074106 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.802160103944459 [arcmin] (formal 1-sigma fit error)
    SNR: 12.1194458449411
 
  Angular difference between Flight and Ground position is 0.608335 arcmin
 
  Partial Coding Fraction: 0.4179688    [ including projection effects ]

  Duration
     T90: 114.519999980927 +/- 23.3490886469143
        Measured from: -11.7520000934601
                   to: 102.767999887466     [s; relative to TRIGTIME]
     T50: 38.5359998941422 +/- 18.5921291415388
        Measured from: 6.74000000953674
                   to: 45.2759999036789     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -17.6640000343323     
                   to: -16.6640000343323     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.6560000181198     
                   to: 109.307999968529     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.707860   1.023557   0.854629   0.291424
           0.104043   0.109474   0.097939   0.085297 [error]
 Peak      0.008860   0.046508   0.069512   0.023300
           0.010280   0.011072   0.010953   0.008762 [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 2.31e-07 4.48e-07 6.76e-07 2.20e-06 1.90e-06 3.56e-06   erg/cm2
              Error 4.78e-08 5.62e-08 9.31e-08 6.69e-07 2.31e-07 7.29e-07   erg/cm2
Peak flux Power-law 2.10e-01 3.29e-01 3.89e-01 8.88e-01 1.19e+00 1.82e+00   ph/cm2/s
              Error 1.03e-01 1.03e-01 7.91e-02 3.68e-01 2.70e-01 3.98e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.31e-07 4.48e-07 6.74e-07 2.21e-06 1.90e-06 3.35e-06   erg/cm2
              Error 4.38e-08 6.08e-08 9.75e-08 8.91e-07 2.28e-07 1.34e-06   erg/cm2
Peak flux Cutoff-PL 1.37e-01 3.30e-01 4.54e-01 3.99e-01 1.15e+00 1.32e+00   ph/cm2/s
              Error 1.20e-01 1.20e-01 1.16e-01 4.42e-01 2.70e-01 5.40e-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    1.409    0.196    -      -           1.55e-03 1.75e-04   53.780 57
CPL   1.406    0.531    10000.0    0.0      1.56e-03 1.75e-04   53.780 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.762    0.358    -      -           1.03e-02 2.45e-03   52.720 57
CPL  -0.473    1.900     129.4  -41.3      3.12e-02 1.08e-01   50.950 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: 56.704000 sec.
T50 in the 50-300 keV band: 23.744000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  126.964  -17.656  109.308
T90   114.520  -11.752  102.768
T50    38.536    6.740   45.276
Peak    1.000  -17.664  -16.664

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
  207.7497    31.1946   0.0158    43.5663     1.0423         2.8278250     12.119 TRIG_01183217                 
 
Foreground time interval of the image:
-17.656  75.253 (delta_t =  92.909 [sec])
Background time interval of the image:
-145.347 -17.656 (delta_t = 127.691 [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

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  -17.656 sec. to  109.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40922     ( -0.19711   0.195135 )
Norm@50keV  : 1.54992E-03    ( -0.000174666   0.000174445 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.78     using 59 bins.
 Reduced chi-squared = 0.943509
# Null hypothesis probability of 5.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 127 sec: 0.189153 ( -0.022342  0.022433 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89869e-06 ( -2.30389e-07  2.31577e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -17.656 sec. to  109.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40627     ( -0.698002   0.363678 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 1.55546E-03    ( -0.000175307   0.000174552 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.78     using 59 bins.
 Reduced chi-squared = 0.960357
# Null hypothesis probability of 5.59e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 127 sec: 0.189223 ( -0.022641  0.022278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90039e-06 ( -2.4811e-07  2.07674e-07 ) ergs/cm2

Band function

Time interval is from  -17.656 sec. to  109.308 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]    : 16.7454  (-2.60851  3.21951)
R^2/D10^2   : 1.46361E-02  (-0.00660362   0.0117881)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   79.81     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.48e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.066e-07   2.437e-08
25- 50  4.659e-07   7.004e-08
50-150  9.281e-07   1.948e-07
15-150  1.501e-06   2.499e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-51.0421      -200)
Norm        : 0.786511       (-0.0887919     0.0887919)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.16e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.488e-07   1.396e-07
25- 50  4.785e-07   2.348e-07
50-150  1.049e-06   5.733e-07
15-150  1.777e-06   9.823e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.24087        (-1.62937      2.2178)
R1^2/D10^2  : 0.195397        (-0.11742      0.2985)
kT2 [keV]   : 34.5230        (-9.91626      29.6992)
R2^2/D10^2  : 1.06332E-03    (-0.000864224   0.00153447)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.07     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.63e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.392e-07   1.123e-07
25- 50  4.655e-07   1.946e-07
50-150  1.236e-06   6.529e-07
15-150  1.941e-06   8.033e-07

Peak spectrum fit

Power-law model

Time interval is from  -17.664 sec. to  -16.664 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.761752     ( -0.379351   0.337054 )
Norm@50keV  : 1.03131E-02    ( -0.00249088   0.0024009 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.72     using 59 bins.
 Reduced chi-squared = 0.924912
# Null hypothesis probability of 6.36e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.18727 ( -0.267346  0.27213 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22512e-07 ( -2.52216e-08  2.52218e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -17.664 sec. to  -16.664 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.472855     ( -2.43314   1.36682 )
Epeak [keV] : 129.388      ( -46.8302 -129.507 )
Norm@50keV  : 3.11895E-02    ( -0.0311285   0.184972 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.95     using 59 bins.
 Reduced chi-squared = 0.909821
# Null hypothesis probability of 6.66e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.14629 ( -0.266159  0.27484 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20687e-07 ( -2.65522e-08  2.59691e-08 ) ergs/cm2

Band function

Time interval is from  -17.664 sec. to  -16.664 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]    : 26.7338  (-5.86402  9.3116)
R^2/D10^2   : 2.60762E-02  (-0.0155102   0.0307144)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.80e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.121e-09   1.492e-09
25- 50  1.830e-08   7.264e-09
50-150  9.576e-08   3.903e-08
15-150  1.172e-07   4.885e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-45.879      -200)
Norm        : 4.99439       (-1.15325     1.15325)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.68e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.245e-08   7.365e-09
25- 50  2.395e-08   1.372e-08
50-150  5.253e-08   3.148e-08
15-150  8.893e-08   5.235e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 1.31907E-04        (-0.000131949      -0.000131949)
kT2 [keV]   : 20.4062        (-5.73313      13.5257)
R2^2/D10^2  : 4.69861E-02    (-0.0343799   0.0309169)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.64     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.42e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

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: 1.30065     ( -0.208338   0.203446 )
Norm@50keV  : 1.78481E-03    ( -0.00021037   0.000210154 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.65e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 92.91 sec: 0.212958 ( -0.0267177  0.0268624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.6384e-06 ( -2.04652e-07  2.05786e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29684     ( -0.712429   0.385174 )
Epeak [keV] : 9998.87      ( -9998.93 -9998.93 )
Norm@50keV  : 1.79240E-03    ( -0.000705808   0.0014073 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.29e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 92.91 sec: 0.213007 ( -0.027128  0.026708 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63812e-06 ( -2.10255e-07  2.0534e-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)  = 4.48e-07
S(50-100 keV) = 6.76e-07

T90 vs. Hardness ratio plot

T90                                   = 114.519999980927 sec.
Hardness ratio (energy fluence ratio) = 1.50893

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.44599
Count Ratio (50-100 keV) / (15-25 keV) = 1.20734

Mask shadow pattern

IMX = 9.510104169653882E-01, IMY = -1.730260021096620E-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:
-145.347410 -17.656000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5288 -40.5544  109.5  54.6 -172.8   0.0664   0.1    0.0	Vela X-1                      
220.9644   2.8747    2.5  41.2   47.6   2.0408   4.6 ------	UNKNOWN                       
171.5085 -37.1512    3.2  34.5  158.6   1.1379   3.6 ------	UNKNOWN                       
212.5488  26.0468    3.4  43.1   10.7   1.2356   3.4 ------	UNKNOWN                       
132.0558  -6.4493    2.8  48.1 -129.2   4.1065   4.2 ------	UNKNOWN                       
158.7964  37.4014    2.7  45.7  -57.9   3.9425   4.3 ------	UNKNOWN

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

Time interval of the image:
-17.656000 75.252590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5210 -40.5696    7.4  54.6 -172.8   0.6397   1.6    1.0	Vela X-1                      
207.7497  31.1946    0.9  43.6    1.0   2.8275  12.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
174.652590 962.212000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3517  35.4243   10.9  38.8   64.8   3.0874   1.1    7.1	Her X-1                       
248.5952  14.7159    2.6  40.8   98.2  11.4091   4.4 ------	UNKNOWN                       
180.9168  39.8177    2.7  23.3  -67.1   4.6095   4.2 ------	UNKNOWN                       
169.1478  -0.0927    2.6  48.1 -129.2  19.6213   4.4 ------	UNKNOWN

Plot creation:
Sat Sep 30 00:44:49 EDT 2023