batgrbproduct analysis for trigger=1202386

batgrbproduct Analysis for Trigger=1202386

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): Tue Dec 26 15:25:43 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1202386
======================================================================

  Trigger: 01202386      Segment: 000

  BAT Trigger Time: 724278300.864   [s; MET]
      Trigger Stop: 724278301.888   [s; MET]
               UTC: 2023-12-14T20:24:28.316380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 305.736484932457   Dec: -72.4361154998792  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.02
     Image Trigger?:     NO
     Rate S/N Ratio:     27.9642629082191  [ if not an image trigger ]
     Image S/N Ratio:    16.02

  Flight Position:   [ source = BAT ]
    RA: 305.736484932457   Dec: -72.4361154998792  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 305.668811260806   Dec: -72.4314385742254  [deg; J2000]  
        { 20h 22m 40.5s , -72d 25' 53.2" }
         +/- 0.917669604417294 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.308116697577104 [arcmin] (formal 1-sigma fit error)
    SNR: 34.3893208094765
 
  Angular difference between Flight and Ground position is 1.257185 arcmin
 
  Partial Coding Fraction: 0.390625    [ including projection effects ]

  Duration
     T90: 27.635999917984 +/- 4.5686374361287
        Measured from: -2.39599990844727
                   to: 25.2400000095367     [s; relative to TRIGTIME]
     T50: 13.8199999332428 +/- 0.536730813787334
        Measured from: 2.25600004196167
                   to: 16.0759999752045     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.5720000267029     
                   to: 13.5720000267029     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.36799991130829     
                   to: 49.4200000762939     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.829022   4.972183   4.628298   1.432183
           0.111239   0.129912   0.122912   0.105672 [error]
 Peak      0.229280   0.433734   0.584797   0.157477
           0.019901   0.025371   0.026148   0.019641 [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 9.97e-07 2.13e-06 3.58e-06 1.38e-05 9.86e-06 2.05e-05   erg/cm2
              Error 6.04e-08 7.63e-08 1.24e-07 1.09e-06 3.15e-07 1.15e-06   erg/cm2
Peak flux Power-law 8.53e-04 1.04e-02 1.34e-01 1.17e+01 6.07e-01 1.18e+01   ph/cm2/s
              Error 9.33e-05 -------- 1.06e-02 7.69e-01 4.58e-02 7.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.10e-07 2.18e-06 3.71e-06 8.60e-06 9.64e-06 1.54e-05   erg/cm2
              Error 7.72e-08 8.39e-08 1.48e-07 2.35e-06 3.38e-07 2.34e-06   erg/cm2
Peak flux Cutoff-PL 2.10e+00 1.86e-08 5.15e-05 7.55e-02 1.39e-04 1.53e-01   ph/cm2/s
              Error 3.38e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+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    1.251    0.054    -      -           1.80e-02 5.39e-04   69.430 57
CPL   0.882    0.229     171.0  104.4      2.63e-02 6.17e-03   61.210 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.893    0.093    -      -           9.90e-02 5.49e-03   67.550 57
CPL   0.608    0.353     296.0  -80.4      1.31e-01 4.59e-02   65.700 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: 13.696000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   54.788   -5.368   49.420
T90    27.636   -2.396   25.240
T50    13.820    2.256   16.076
Peak    1.000   12.572   13.572

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
  305.6688   -72.4314   0.0055    34.8187  -124.5726         8.6888983     34.389 TRIG_01202386                 
 
Foreground time interval of the image:
 -5.368  14.637 (delta_t =  20.005 [sec])
Background time interval of the image:
-60.864  -5.368 (delta_t =  55.496 [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   -5.368 sec. to   49.420 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25119     ( -0.0538469   0.0536518 )
Norm@50keV  : 1.79607E-02    ( -0.000538575   0.000538445 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.43     using 59 bins.
 Reduced chi-squared = 1.21807
# Null hypothesis probability of 1.25e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 54.79 sec: 2.12469 ( -0.06791  0.06802 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.84648e-06 ( -3.14316e-07  3.15106e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -5.368 sec. to   49.420 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.882333     ( -0.234526   0.222689 )
Epeak [keV] : 171.015      ( -45.0378 163.706 )
Norm@50keV  : 2.63279E-02    ( -0.00530745   0.0070244 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.21     using 59 bins.
 Reduced chi-squared = 1.09304
# Null hypothesis probability of 2.94e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 54.79 sec: 2.08175 ( -0.07218  0.07238 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.6534e-06 ( -3.39287e-07  3.37659e-07 ) ergs/cm2

Band function

Time interval is from   -5.368 sec. to   49.420 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]    : 19.0712  (  )
R^2/D10^2   : 0.112354  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  229.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.70e-22 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.395e-07   2.739e-08
25- 50  2.119e-06   9.369e-08
50-150  5.669e-06   2.772e-07
15-150  8.228e-06   2.959e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 8.98260       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  158.69     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.58e-11 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.225e-06   3.863e-08
25- 50  2.357e-06   7.999e-08
50-150  5.170e-06   1.745e-07
15-150  8.753e-06   2.931e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.71140        (-1.25523      1.42881)
R1^2/D10^2  : 0.847261        (-0.289765      0.507493)
kT2 [keV]   : 31.3292        (-3.9374      6.46187)
R2^2/D10^2  : 1.74316E-02    (-0.008173   0.0106921)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.88     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.31e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.165e-07   9.616e-08
25- 50  2.256e-06   1.786e-07
50-150  6.569e-06   6.410e-07
15-150  9.641e-06   9.205e-07

Peak spectrum fit

Power-law model

Time interval is from   12.572 sec. to   13.572 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.892976     ( -0.0938206   0.0921557 )
Norm@50keV  : 9.89504E-02    ( -0.00549766   0.00547629 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.55     using 59 bins.
 Reduced chi-squared = 1.18509
# Null hypothesis probability of 1.60e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.606597 ( -0.030182  0.061394 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11365e-06 ( -6.41076e-08  6.42543e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   12.572 sec. to   13.572 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.608339     ( -0.388363   0.318442 )
Epeak [keV] : 296.024      ( -135.166 -296.024 )
Norm@50keV  : 0.130861    ( -0.0344049   0.0574791 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.70     using 59 bins.
 Reduced chi-squared = 1.17321
# Null hypothesis probability of 1.76e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.38775E-04 ( -0.000138775  -0.000138775 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10599e-06 ( -6.56387e-08  6.55038e-08 ) ergs/cm2

Band function

Time interval is from   12.572 sec. to   13.572 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]    : 24.9228  (-1.79144  2.00383)
R^2/D10^2   : 0.288780  (-0.0606389   0.0743943)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  111.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.14e-05 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.121e-08   3.780e-09
25- 50  1.768e-07   1.400e-08
50-150  8.147e-07   6.610e-08
15-150  1.023e-06   7.090e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 45.1596       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  201.86     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.52e-18 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.125e-07   7.250e-09
25- 50  2.163e-07   1.605e-08
50-150  4.744e-07   1.110e-07
15-150  8.032e-07   1.053e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.12626        (-1.61569      2.13869)
R1^2/D10^2  : 6.27431        (-3.53763      9.21296)
kT2 [keV]   : 33.0785        (-4.04182      6.26974)
R2^2/D10^2  : 0.110943    (-0.0463363   0.0567716)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.24     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.08e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.998e-08   2.607e-08
25- 50  1.883e-07   4.430e-08
50-150  8.584e-07   1.240e-07
15-150  1.117e-06   1.735e-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: 1.15743     ( -0.0603338   0.0599587 )
Norm@50keV  : 3.01572E-02    ( -0.00103089   0.00103019 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.84e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 20 sec: 3.52010 ( -0.126412  0.126587 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.19522e-06 ( -2.24714e-07  2.25052e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.768775     ( -0.263712   0.248717 )
Epeak [keV] : 181.408      ( -50.6836 205.112 )
Norm@50keV  : 4.49284E-02    ( -0.00989442   0.0135147 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.63e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 20 sec: 3.45349 ( -0.13267  0.13288 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.08438e-06 ( -2.3988e-07  2.3872e-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)  = 2.13e-06
S(50-100 keV) = 3.58e-06

T90 vs. Hardness ratio plot

T90                                   = 27.635999917984 sec.
Hardness ratio (energy fluence ratio) = 1.68075

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.75756
Count Ratio (50-100 keV) / (15-25 keV) = 1.63601

Mask shadow pattern

IMX = -3.946623614373017E-01, IMY = 5.726816273078305E-01

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:
-60.864000 -5.368000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 37.6571 -28.0064    2.6  31.6   84.7   1.7794   4.4 ------	UNKNOWN                       
323.3415 -24.5655    2.0  42.6  -42.5   2.6147   5.7 ------	UNKNOWN                       
209.3041 -74.2015    3.0  55.0 -145.4   5.4037   3.8 ------	UNKNOWN                       
311.7520 -32.4721    2.5  44.4  -61.1   5.1089   4.5 ------	UNKNOWN

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

Time interval of the image:
-5.368000 14.636600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 10.1890   1.6620    3.3  51.7   30.7   2.2033   3.5 ------	UNKNOWN                       
337.1696 -20.5096    2.4  38.1  -23.0   0.9037   4.8 ------	UNKNOWN                       
305.6689 -72.4314    0.3  34.8 -124.6   8.6882  34.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
88.836600 481.636600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.4314 -60.4623   13.5  43.6  171.5   1.5040   0.9   10.2	Cen X-3                       
186.5147 -62.8857    9.9  38.6 -179.0   1.5313   1.2    7.9	GX 301-2                      
264.8492 -44.5841   21.1  33.8  -95.8   0.8099   0.5    9.2	4U 1735-44                    
145.5902 -60.0095    3.1  46.8  154.8   9.7704   3.7 ------	UNKNOWN                       
343.8640 -40.2967    2.7  37.1   12.6   4.7571   4.2 ------	UNKNOWN                       
175.1518 -58.2136    2.4  45.0  175.8   9.0972   4.9 ------	UNKNOWN                       
287.9265 -29.1171    2.6  44.4  -61.2  18.1806   4.5 ------	UNKNOWN

Plot creation:
Tue Dec 26 16:58:13 EST 2023