batgrbproduct analysis for trigger=1216804

batgrbproduct Analysis for Trigger=1216804

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): Sat Mar  9 13:54:13 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1216804
======================================================================

  Trigger: 01216804      Segment: 000

  BAT Trigger Time: 730284724.288   [s; MET]
      Trigger Stop: 730284725.312   [s; MET]
               UTC: 2024-02-22T08:51:31.328680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 143.247834483184   Dec: -68.0289508826161  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.35
     Image Trigger?:     NO
     Rate S/N Ratio:     29.2232783924049  [ if not an image trigger ]
     Image S/N Ratio:    9.35

  Flight Position:   [ source = BAT ]
    RA: 143.247834483184   Dec: -68.0289508826161  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 143.207833587025   Dec: -68.0314074925631  [deg; J2000]  
        { 09h 32m 49.9s , -68d 01' 53.1" }
         +/- 1.82535659216322 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.80098663106405 [arcmin] (formal 1-sigma fit error)
    SNR: 12.8755116540803
 
  Angular difference between Flight and Ground position is 0.909921 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 3.94399988651276 +/- 2.33488331466837
        Measured from: -2.66799998283386
                   to: 1.27599990367889     [s; relative to TRIGTIME]
     T50: 0.979999899864197 +/- 2.36447378531799
        Measured from: -0.0759999752044678
                   to: 0.903999924659729     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.203999996185303     
                   to: 0.796000003814697     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.7039999961853     
                   to: 1.36800003051758     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.041681   0.107525   0.133828   0.042187
           0.013519   0.014185   0.012804   0.011111 [error]
 Peak      0.019692   0.060968   0.061661   0.032709
           0.006878   0.007470   0.007353   0.006351 [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 1.37e-08 4.00e-08 9.53e-08 6.19e-07 2.57e-07 7.70e-07   erg/cm2
              Error 3.93e-09 6.88e-09 1.17e-08 1.83e-07 3.21e-08 1.86e-07   erg/cm2
Peak flux Power-law 2.36e-01 3.54e-01 3.98e-01 8.50e-01 1.24e+00 1.84e+00   ph/cm2/s
              Error 6.80e-02 6.29e-02 5.54e-02 2.57e-01 1.71e-01 2.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.06e-08 4.06e-08 1.03e-07 2.71e-07 2.50e-07 4.28e-07   erg/cm2
              Error 4.98e-09 7.72e-09 1.53e-08 2.48e-07 3.40e-08 2.44e-07   erg/cm2
Peak flux Cutoff-PL 1.79e-01 3.66e-01 4.43e-01 3.79e-01 1.20e+00 1.37e+00   ph/cm2/s
              Error 8.16e-02 7.16e-02 7.20e-02 3.38e-01 1.77e-01 3.80e-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    0.751    0.222    -      -           5.29e-03 7.05e-04   54.210 57
CPL  -0.046    1.019     161.7  -48.5      1.09e-02 1.19e-02   51.960 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.830    0.232    -      -           1.08e-02 1.50e-03   53.350 57
CPL  -0.137    1.104     130.0  919.4      2.82e-02 3.93e-02   50.360 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: 3.904000 sec.
T50 in the 50-300 keV band: 0.896000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    4.072   -2.704    1.368
T90     3.944   -2.668    1.276
T50     0.980   -0.076    0.904
Peak    1.000   -0.204    0.796

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
  143.2078   -68.0314   0.0150    24.2829  -157.8715         0.3472245     12.876 TRIG_01216804                 
 
Foreground time interval of the image:
 -2.704   1.368 (delta_t =   4.072 [sec])
Background time interval of the image:
-132.387  -2.704 (delta_t = 129.683 [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   -2.704 sec. to    1.368 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.751449     ( -0.22918   0.214506 )
Norm@50keV  : 5.29051E-03    ( -0.000712003   0.000697735 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.21     using 59 bins.
 Reduced chi-squared = 0.951053
# Null hypothesis probability of 5.80e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 4.072 sec: 0.609401 ( -0.077689  0.07827 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57062e-07 ( -3.20697e-08  3.21842e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.704 sec. to    1.368 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.55262E-02     ( -1.1695   0.867725 )
Epeak [keV] : 161.653      ( -64.6433 -161.653 )
Norm@50keV  : 1.09455E-02    ( -0.00591274   0.0178782 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.96     using 59 bins.
 Reduced chi-squared = 0.927857
# Null hypothesis probability of 6.28e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 4.072 sec: 0.587961 ( -0.081304  0.081871 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.49861e-07 ( -3.4152e-08  3.37598e-08 ) ergs/cm2

Band function

Time interval is from   -2.704 sec. to    1.368 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]    : 27.0492  (-4.12851  5.48585)
R^2/D10^2   : 1.24507E-02  (-0.00519006   0.00810425)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.47e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.171e-09   1.670e-09
25- 50  3.638e-08   9.638e-09
50-150  1.943e-07   3.824e-08
15-150  2.369e-07   4.689e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-21.1793      -200)
Norm        : 2.48188       (-0.330142     0.330142)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   91.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.76e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.517e-08   1.428e-08
25- 50  4.843e-08   2.663e-08
50-150  1.062e-07   5.886e-08
15-150  1.798e-07   1.008e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.31568        (-4.40781      13.7773)
R1^2/D10^2  : 0.103219        (-0.0954536      1.70503)
kT2 [keV]   : 34.2487        (-8.55008      -34.1548)
R2^2/D10^2  : 5.58364E-03    (-0.00520625   0.0086475)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.15e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.105e-08   6.546e-09
25- 50  4.105e-08   2.140e-08
50-150  2.002e-07   1.075e-07
15-150  2.523e-07   1.304e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.204 sec. to    0.796 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.830411     ( -0.237274   0.226152 )
Norm@50keV  : 1.08310E-02    ( -0.00151184   0.00149737 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.35     using 59 bins.
 Reduced chi-squared = 0.935965
# Null hypothesis probability of 6.13e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.24373 ( -0.17053  0.17117 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24994e-07 ( -1.78766e-08  1.8004e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.204 sec. to    0.796 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.136557     ( -1.25104   0.956426 )
Epeak [keV] : 129.992      ( -43.3731 1795.5 )
Norm@50keV  : 2.81848E-02    ( -0.0169593   0.0615694 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.36     using 59 bins.
 Reduced chi-squared = 0.899286
# Null hypothesis probability of 6.87e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.19732 ( -0.17676  0.17724 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.19286e-07 ( -1.96836e-08  1.93736e-08 ) ergs/cm2

Band function

Time interval is from   -0.204 sec. to    0.796 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]    : 23.8496  (-3.90942  5.10188)
R^2/D10^2   : 3.66147E-02  (-0.016144   0.0268474)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.22e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.707e-09   1.118e-09
25- 50  2.052e-08   4.340e-09
50-150  8.700e-08   2.324e-08
15-150  1.112e-07   2.360e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-27.6957      -200)
Norm        : 4.89897       (-0.711218     0.711218)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.09     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.33e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.219e-08   6.915e-09
25- 50  2.346e-08   1.319e-08
50-150  5.144e-08   2.909e-08
15-150  8.709e-08   4.845e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.5752        (-6.34      11.5912)
R1^2/D10^2  : 0.142716        (-0.0634122      1.81373)
kT2 [keV]   : 35.1315        (-32.0423      -36.2243)
R2^2/D10^2  : 9.01850E-03    (-0.00803622   0.0308746)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.83     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.72e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.601e-09   3.339e-09
25- 50  2.244e-08   1.310e-08
50-150  9.250e-08   4.915e-08
15-150  1.205e-07   6.305e-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: 0.751449     ( -0.22918   0.214506 )
Norm@50keV  : 5.29051E-03    ( -0.000712003   0.000697735 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.21     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.80e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 4.072 sec: 0.609410 ( -0.0776909  0.0782679 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.57033e-07 ( -3.20635e-08  3.21913e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.55263E-02     ( -1.1695   0.867725 )
Epeak [keV] : 161.653      ( -59.7322 -161.653 )
Norm@50keV  : 1.09455E-02    ( -0.00592275   0.0178782 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.28e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 4.072 sec: 0.587970 ( -0.081292  0.081857 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.49993e-07 ( -3.41726e-08  3.37866e-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)  = 4.00e-08
S(50-100 keV) = 9.53e-08

T90 vs. Hardness ratio plot

T90                                   = 3.94399988651276 sec.
Hardness ratio (energy fluence ratio) = 2.3825

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.57971
Count Ratio (50-100 keV) / (15-25 keV) = 3.21077

Mask shadow pattern

IMX = -4.179265294965571E-01, IMY = 1.699443114918553E-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:
-132.387400 -2.704000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6249 -40.6323    1.5  15.4  115.1   1.6751   7.5    6.4	Vela X-1                      
170.5731 -60.6268    3.0  32.8  179.3   1.0479   3.9    7.6	Cen X-3                       
186.3543 -62.8329   21.8  40.0 -175.5  -0.1754  -0.5    9.1	GX 301-2                      
175.1695 -54.5732    2.2  36.2  169.4   1.5401   5.3 ------	UNKNOWN

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

Time interval of the image:
-2.704000 1.368000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4961 -40.5505    5.1  15.4  115.1   0.0631   2.3    1.5	Vela X-1                      
170.2053 -60.7319   34.6  32.8  179.6  -0.0106  -0.3    7.3	Cen X-3                       
186.6504 -62.7740  182.2  40.3 -175.5  -0.0025  -0.1    0.3	GX 301-2                      
152.3573 -32.0503    2.8  31.3  119.2   0.1597   4.1 ------	UNKNOWN                       
143.2078 -68.0314    0.9  24.3 -157.9   0.3474  12.9 ------	UNKNOWN                       
241.7167 -70.6547    2.1  55.2 -153.0   0.6246   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
76.812600 962.802000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5439 -40.5254    1.3  27.8   65.7  17.1011   8.6    1.9	Vela X-1                      
170.3291 -60.6092    1.8  13.7  148.7   8.3280   6.4    0.9	Cen X-3                       
186.6303 -62.7625    3.6  18.4  172.6   3.9785   3.2    0.9	GX 301-2                      
 92.2156 -35.4871    4.0  43.1   10.4   6.2802   2.9 ------	UNKNOWN                       
186.7872 -80.4846    3.2  16.4 -125.6   4.3866   3.6 ------	UNKNOWN

Plot creation:
Sat Mar  9 15:13:23 EST 2024