batgrbproduct analysis for trigger=1185505

batgrbproduct Analysis for Trigger=1185505

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 23:29:39 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1185505
======================================================================

  Trigger: 01185505      Segment: 000

  BAT Trigger Time: 713789427.776   [s; MET]
      Trigger Stop: 713789428.8   [s; MET]
               UTC: 2023-08-15T10:49:55.945980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 184.771873845278   Dec: -58.0651019896104  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.07
     Image Trigger?:     NO
     Rate S/N Ratio:     67.0447611674469  [ if not an image trigger ]
     Image S/N Ratio:    15.07

  Flight Position:   [ source = BAT ]
    RA: 184.771873845278   Dec: -58.0651019896104  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 184.760501860416   Dec: -58.0669424982515  [deg; J2000]  
        { 12h 19m 02.5s , -58d 04' 01.0" }
         +/- 1.21113898820761 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.459609514880024 [arcmin] (formal 1-sigma fit error)
    SNR: 23.1350173830039
 
  Angular difference between Flight and Ground position is 0.377424 arcmin
 
  Partial Coding Fraction: 0.1113281    [ including projection effects ]

  Duration
     T90: 17 +/- 7.61577310586391
        Measured from: -11.7760000228882
                   to: 5.22399997711182     [s; relative to TRIGTIME]
     T50: 2 +/- 1
        Measured from: -0.776000022888184
                   to: 1.22399997711182     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.223999977111816     
                   to: 1.22399997711182     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.7760000228882     
                   to: 9.22399997711182     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.020229   2.281903   2.479680   1.148726
           0.121811   0.135263   0.128715   0.115206 [error]
 Peak      0.246698   0.442776   0.700451   0.252316
           0.031957   0.041196   0.044268   0.034941 [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 4.94e-07 1.10e-06 1.93e-06 7.92e-06 5.28e-06 1.14e-05   erg/cm2
              Error 6.11e-08 8.18e-08 1.20e-07 1.12e-06 3.13e-07 1.16e-06   erg/cm2
Peak flux Power-law 2.98e+00 4.10e+00 4.17e+00 7.72e+00 1.37e+01 1.90e+01   ph/cm2/s
              Error 5.01e-01 4.29e-01 3.26e-01 1.27e+00 1.13e+00 1.51e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.62e-07 2.29e-07 2.52e-07 6.72e-07 8.09e-07 1.43e-06   erg/cm2
              Error 4.94e-08 1.37e-07 1.30e-07 2.07e-06 3.50e-07 6.30e-07   erg/cm2
Peak flux Cutoff-PL 2.70e+00 4.14e+00 4.37e+00 5.93e+00 1.36e+01 1.71e+01   ph/cm2/s
              Error 6.49e-01 4.51e-01 4.62e-01 2.14e+00 1.15e+00 2.55e+00   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    1.189    0.101    -      -           2.16e-02 1.29e-03   51.540 57
CPL   0.891    0.395     221.9  -61.7      2.91e-02 1.19e-02   50.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.975    0.131    -      -           1.19e-01 9.62e-03   40.600 57
CPL   0.659    0.530     264.4    0.0      1.62e-01 8.48e-02   39.640 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: 20.352000 sec.
T50 in the 50-300 keV band: 1.856000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   24.000  -14.776    9.224
T90    17.000  -11.776    5.224
T50     2.000   -0.776    1.224
Peak    1.000    0.224    1.224

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
  184.7605   -58.0669   0.0083    54.4259    -2.7079         7.1087104     23.135 TRIG_01185505                 
 
Foreground time interval of the image:
-14.776   9.224 (delta_t =  24.000 [sec])
Background time interval of the image:
-239.776 -14.776 (delta_t = 225.000 [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 1.024000

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 1.024000

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 1.024000

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  -14.776 sec. to    9.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18944     ( -0.101914   0.100279 )
Norm@50keV  : 2.16120E-02    ( -0.00129147   0.00128659 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.54     using 59 bins.
 Reduced chi-squared = 0.904211
# Null hypothesis probability of 6.79e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 24 sec: 2.53311 ( -0.16305  0.16377 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.27875e-06 ( -3.12586e-07  3.12914e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -14.776 sec. to    9.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.891034     ( -0.449929   0.33998 )
Epeak [keV] : 221.917      ( -98.5595 -221.933 )
Norm@50keV  : 2.90586E-02    ( -0.0081877   0.015659 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.03     using 59 bins.
 Reduced chi-squared = 0.893393
# Null hypothesis probability of 6.99e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 24 sec: 2.49832 ( -0.16917  0.17012 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.09676e-07 ( -3.84293e-07  3.15994e-07 ) ergs/cm2

Band function

Time interval is from  -14.776 sec. to    9.224 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]    : 20.8938  (-1.49425  1.672)
R^2/D10^2   : 0.102249  (-0.0234453   0.0293609)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   97.65     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.50e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.028e-07   2.424e-08
25- 50  1.039e-06   9.468e-08
50-150  3.380e-06   2.700e-07
15-150  4.622e-06   3.180e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-8.94465      -200)
Norm        : 10.9968       (-0.650668     0.650668)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   91.86     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.35e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.575e-07   4.380e-08
25- 50  1.265e-06   8.976e-08
50-150  2.774e-06   2.232e-07
15-150  4.696e-06   5.076e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.4480        (-2.80637      2.97401)
R1^2/D10^2  : 0.487969        (-0.219686      0.562124)
kT2 [keV]   : 47.1727        (-15.6183      -47.3265)
R2^2/D10^2  : 5.80598E-03    (-0.00468192   0.0153725)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.18     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.59e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.583e-07   9.322e-08
25- 50  1.213e-06   2.930e-07
50-150  3.641e-06   1.421e-06
15-150  5.212e-06   1.725e-06

Peak spectrum fit

Power-law model

Time interval is from    0.224 sec. to    1.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.975316     ( -0.132725   0.129082 )
Norm@50keV  : 0.119364    ( -0.00966196   0.00957907 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.60     using 59 bins.
 Reduced chi-squared = 0.712281
# Null hypothesis probability of 9.51e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 13.7261 ( -1.131  1.1345 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30236e-06 ( -1.02281e-07  1.02458e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.224 sec. to    1.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.658599     ( -0.612399   0.448412 )
Epeak [keV] : 264.391      ( -264.394 -264.394 )
Norm@50keV  : 0.161521    ( -0.0489333   0.12064 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.64     using 59 bins.
 Reduced chi-squared = 0.707857
# Null hypothesis probability of 9.52e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 13.5966 ( -1.1519  1.1553 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29903e-06 ( -1.03501e-07  1.03364e-07 ) ergs/cm2

Band function

Time interval is from    0.224 sec. to    1.224 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]    : 24.1870  (-2.25686  2.63986)
R^2/D10^2   : 0.378532  (-0.106759   0.140301)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.09     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.31e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.914e-08   6.465e-09
25- 50  2.183e-07   2.795e-08
50-150  9.506e-07   9.780e-08
15-150  1.208e-06   1.135e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-10.5655      -200)
Norm        : 57.8445       (-4.68606     4.68606)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   97.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.35e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.441e-07   1.380e-08
25- 50  2.772e-07   3.680e-08
50-150  6.079e-07   2.066e-07
15-150  1.029e-06   2.744e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.4402        (-7.30543      6.9128)
R1^2/D10^2  : 2.05867        (-1.32066      105.645)
kT2 [keV]   : 41.6042        (-16.3164      -41.8923)
R2^2/D10^2  : 5.65453E-02    (-0.0476257   0.247778)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.53     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.90e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.061e-08   3.663e-08
25- 50  2.515e-07   1.289e-07
50-150  9.773e-07   4.559e-07
15-150  1.299e-06   5.459e-07

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: 1.18944     ( -0.101914   0.100279 )
Norm@50keV  : 2.16120E-02    ( -0.00129147   0.00128659 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.54     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.79e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 24 sec: 2.53304 ( -0.162988  0.163813 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.27813e-06 ( -3.12708e-07  3.12929e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.891031     ( -0.449928   0.339974 )
Epeak [keV] : 221.914      ( -98.5817 -221.933 )
Norm@50keV  : 2.90588E-02    ( -0.0081877   0.015659 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.03     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.99e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 24 sec: 2.49816 ( -0.16914  0.17006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.23901e-06 ( -3.17952e-07  3.20064e-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)  = 1.10e-06
S(50-100 keV) = 1.93e-06

T90 vs. Hardness ratio plot

T90                                   = 17 sec.
Hardness ratio (energy fluence ratio) = 1.75455

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.23666
Count Ratio (50-100 keV) / (15-25 keV) = 2.43051

Mask shadow pattern

IMX = 1.396560756530646E+00, IMY = 6.605224315631884E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.776000 -14.776000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5831 -40.6070    4.2  31.9  -44.4   1.6819   2.7    4.0	Vela X-1                      
170.3369 -60.6370    4.1  46.7   -3.5  -2.3224  -2.8    1.0	Cen X-3                       
186.7199 -62.7171    4.9  53.0    2.9   2.4530   2.4    3.6	GX 301-2                      
 37.7264 -29.2353    2.6  45.1  129.1  10.1835   4.4 ------	UNKNOWN                       
 56.4329   2.2302    2.6  56.8  173.9   8.4513   4.4 ------	UNKNOWN                       
119.9591 -35.3576    3.2  23.3  -66.8   1.9427   3.6 ------	UNKNOWN                       
101.6182   2.2872    3.2  48.1 -129.1   7.4502   3.7 ------	UNKNOWN

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

Time interval of the image:
-14.776000 9.224000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6570 -40.5378   10.2  32.0  -44.5  -0.1126  -1.1    5.9	Vela X-1                      
170.4328 -60.5888  838.3  46.7   -3.6   0.0021   0.0    4.0	Cen X-3                       
186.6634 -62.7690    9.7  53.0    3.0  -0.3365  -1.2    0.2	GX 301-2                      
 52.3581 -12.3010    2.3  46.9  159.4   0.8768   4.9 ------	UNKNOWN                       
 98.3784 -65.2544    2.4  20.5   30.1   0.3499   4.7 ------	UNKNOWN                       
184.7605 -58.0669    0.5  54.4   -2.7   7.1090  23.1 ------	UNKNOWN                       
 68.6156   9.8081    2.3  58.7 -169.3   2.0538   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
116.124600 962.354000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5922 -40.6414    3.1  35.4 -132.8   7.2365   3.8    6.0	Vela X-1                      
170.0199 -60.6685    7.6   7.9 -166.0   1.7268   1.5    9.1	Cen X-3                       
186.6339 -62.7979    2.4   4.9  119.4   5.1590   4.8    1.8	GX 301-2                      
176.8136 -35.2669    2.5  23.4  -66.9   6.6843   4.6 ------	UNKNOWN                       
188.2820 -13.0978    3.3  45.0  -45.5  10.0338   3.5 ------	UNKNOWN                       
129.7503 -29.1057    3.0  47.3 -127.2  20.9167   3.8 ------	UNKNOWN

Plot creation:
Sat Sep 30 00:44:04 EDT 2023