batgrbproduct analysis for trigger=1205107

batgrbproduct Analysis for Trigger=1205107

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
4) This page will be updated for up to 15 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Fri Dec 29 10:13:15 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1205107/GCN5_download_cron
======================================================================

  Trigger: 01205107      Segment: 000

  BAT Trigger Time: 725445424   [s; MET]
      Trigger Stop: 725445528   [s; MET]
               UTC: 2023-12-28T08:36:31.372320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 300.460982746026   Dec: 35.3340881333985  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.37
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    14.37

  Flight Position:   [ source = BAT ]
    RA: 300.460982746026   Dec: 35.3340881333985  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 300.454955551499   Dec: 35.3333444081552  [deg; J2000]  
        { 20h 01m 49.2s , +35d 20' 00.0" }
         +/- 1.63085094591772 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.562464064741035 [arcmin] (formal 1-sigma fit error)
    SNR: 15.1240959189814
 
  Angular difference between Flight and Ground position is 0.298374 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 453.535999894142 +/- 176.389778189224
        Measured from: -18.8639998435974
                   to: 434.672000050545     [s; relative to TRIGTIME]
     T50: 284.051999926567 +/- 68.4326362646217
        Measured from: 35.9160001277924
                   to: 319.968000054359     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 111.299999952316     
                   to: 112.299999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -82.8040000200272     
                   to: 725.955999970436     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     7.483141   6.605699   2.901170   0.384329
           0.176058   0.177323   0.147941   0.124507 [error]
 Peak      0.018869   0.021843   0.011909   0.015129
           0.006008   0.006016   0.005294   0.004439 [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 2.24e-06 2.64e-06 2.24e-06 3.22e-06 8.27e-06 1.03e-05   erg/cm2
              Error 1.38e-07 9.62e-08 1.45e-07 4.36e-07 3.23e-07 5.67e-07   erg/cm2
Peak flux Power-law 1.64e-01 1.49e-01 9.30e-02 8.88e-02 4.43e-01 4.95e-01   ph/cm2/s
              Error 7.64e-02 4.51e-02 4.22e-02 8.34e-02 1.33e-01 1.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-06 2.68e-06 2.22e-06 2.32e-06 8.10e-06 9.41e-06   erg/cm2
              Error 1.62e-07 1.18e-07 1.54e-07 1.09e-06 4.27e-07 1.16e-06   erg/cm2
Peak flux Cutoff-PL 1.67e-01 1.49e-01 9.16e-02 8.52e-02 4.43e-01 4.94e-01   ph/cm2/s
              Error 7.70e-02 4.48e-02 4.20e-02 9.75e-02 1.33e-01 1.62e-01   ph/cm2/s
 
Fluence        Band 2.09e-06 2.69e-06 2.19e-06 2.96e-06 8.08e-06 9.96e-06   erg/cm2
              Error 1.88e-07 -------- 1.56e-07 -------- 2.78e-07 --------   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    2.237    0.080    -      -           1.09e-03 4.93e-05   53.910 57
CPL   1.993   -0.852       1.2    0.5      1.48e-03 1.22e-04   52.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.677    0.583    -      -           3.36e-03 1.17e-03   51.750 57
CPL   2.311    2.054     112.0    0.0      1.57e-03 0.00e+00   51.660 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  808.760  -82.804  725.956
T90   453.536  -18.864  434.672
T50   284.052   35.916  319.968
Peak    1.000  111.300  112.300

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  300.4550 +35.3333 0.0127    4.7  -40.7       3.0479    15.1  TRIG_01205107       
------------------------------------------
 
Foreground time interval of the image:
-12.899 111.201 (delta_t = 124.100 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) The mask-weighted light curves are using the flight position.
3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
4) 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.
5) 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.
6) 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)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of 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.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.23652     ( -0.07959   0.0809803 )
Norm@50keV  : 1.09096E-03    ( -4.95126e-05   4.90737e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.91 using 59 PHA bins.
# Reduced chi-squared =         0.9457 for     57 degrees of freedom 
# Null hypothesis probability =   5.918703e-01
 
Photon flux (15-150 keV)    in 801.8 sec: 0.184152 ( -0.00733294  0.00736777 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.26912e-06 ( -3.22353e-07  3.2384e-07 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99315     ( -0.289767   -1.99315 )
Epeak [keV] : 1.23659      ( -0.326735 0.628796 )
Norm@50keV  : 1.47904E-03    ( -0.000119794   0.000123355 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.99 using 59 PHA bins.
# Reduced chi-squared =         0.9462 for     56 degrees of freedom 
# Null hypothesis probability =   5.897215e-01
 
Photon flux (15-150 keV)    in 801.8 sec: 0.181484 ( -0.008492  0.008469 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.10131e-06 ( -4.26437e-07  4.2784e-07 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
-82.804000 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 725.956000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.13998   (     )
beta        : -8.12642    (     )
Epeak [keV] : 64.7600      (   )
Norm@50keV   : 2.48026E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         152.25 using 59 PHA bins.
# Reduced chi-squared =         2.7682 for     55 degrees of freedom 
# Null hypothesis probability =   4.590304e-11
 
Photon flux (15-150 keV)    in 801.8 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.07509e-06 ( -8.06948e-06  -1.87292e-07 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.65082  (  )
R^2/D10^2   : 8.69598E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         201.34 using 59 PHA bins.
# Reduced chi-squared =         3.5323 for     57 degrees of freedom 
# Null hypothesis probability =   5.451309e-18
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.305e-06   8.419e-08
25- 50  3.084e-06   1.115e-07
50-150  1.451e-06   1.475e-07
15-150  5.840e-06   2.197e-07

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 51.1272       (-5.32381      6.64549)
Norm        : 0.984060       (-0.070271     0.0834704)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.939e-06   1.211e-07
25- 50  2.807e-06   1.106e-07
50-150  2.783e-06   2.682e-07
15-150  7.528e-06   3.115e-07

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.62298        (-0.716155      0.782521)
R1^2/D10^2  : 0.583093        (-0.224789      0.423737)
kT2 [keV]   : 18.7463        (-2.81005      4.24511)
R2^2/D10^2  : 4.32527E-03    (-0.00240411   0.00427475)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.019e-06   2.454e-07
25- 50  2.681e-06   2.622e-07
50-150  3.060e-06   5.637e-07
15-150  7.761e-06   9.397e-07

Peak spectrum fit

Power-law model

Time interval is from  111.300 sec. to  112.300 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67734     ( -0.558363   0.606733 )
Norm@50keV  : 3.36312E-03    ( -0.00121349   0.00113645 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.75 using 59 PHA bins.
# Reduced chi-squared =         0.9078 for     57 degrees of freedom 
# Null hypothesis probability =   6.719009e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.443182 ( -0.133403  0.133435 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.11975e-08 ( -1.1225e-08  1.18662e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  111.300 sec. to  112.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.31052     ( -4.0043   0.103347 )
Epeak [keV] : 112.039      (   )
Norm@50keV  : 1.57205E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.66 using 59 PHA bins.
# Reduced chi-squared =         0.9225 for     56 degrees of freedom 
# Null hypothesis probability =   6.396811e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.443276 ( -0.133286  0.133236 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12296e-08 ( -1.23235e-08  1.15951e-08 ) ergs/cm2

Band function

Time interval is from  111.300 sec. to  112.300 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.84349   ( -4.84349   -4.84349 )
beta        : -1.80816    ( -1.18499   0.639078 )
Epeak [keV] : 23.8161      ( -23.8161 12.8747 )
Norm@50keV   : 441.259    ( -132.135   4.40163e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.52 using 59 PHA bins.
# Reduced chi-squared =         0.9368 for     55 degrees of freedom 
# Null hypothesis probability =   6.082842e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.5419  (-3.19113  4.93507)
R^2/D10^2   : 0.172542  (-0.172437   0.481574)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.967e-09   2.545e-09
25- 50  1.061e-08   6.295e-09
50-150  6.438e-09   5.040e-09
15-150  2.101e-08   1.394e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 131.756       (-92.8993      -132.019)
Norm        : 1.85947       (-0.601809     1.09089)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.821e-09   2.868e-09
25- 50  8.760e-09   5.225e-09
50-150  1.634e-08   1.134e-08
15-150  2.992e-08   1.939e-08

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.58542        (-3.49728      3.57646)
R1^2/D10^2  : 0.328039        (-0.248582      1.68837)
kT2 [keV]   : 198.080        (-198.188      -198.188)
R2^2/D10^2  : 6.18005E-05    (-4.5875e-05   0.0238603)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.663e-09   2.848e-09
25- 50  9.705e-09   5.760e-09
50-150  1.920e-08   4.131e-09
15-150  3.357e-08   1.262e-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: 2.21761     ( -0.143014   0.149273 )
Norm@50keV  : 1.20413E-03    ( -0.000119264   0.000117565 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.36 using 59 PHA bins.
# Reduced chi-squared =          1.269 for     57 degrees of freedom 
# Null hypothesis probability =   8.266497e-02
 
Photon flux (15-150 keV)    in 124.1 sec: 0.201212 ( -0.0141911  0.0141975 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40856e-06 ( -1.18013e-07  1.20169e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49241     ( -1.00096   0.507748 )
Epeak [keV] : 26.2919      (   )
Norm@50keV  : 3.34098E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.98 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     56 degrees of freedom 
# Null hypothesis probability =   9.918831e-02
 
Photon flux (15-150 keV)    in 124.1 sec: 0.194517 ( -0.015892  0.015929 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.28658e-06 ( -1.55171e-07  1.76507e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.754316   ( -1.42051   2.86735 )
beta        : -2.65149    ( -1.13491   0.386594 )
Epeak [keV] : 28.6528      ( -9.48226 5.70581 )
Norm@50keV   : 1.05096E-02    ( -0.0109425   1.78864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.91 using 59 PHA bins.
# Reduced chi-squared =          1.217 for     55 degrees of freedom 
# Null hypothesis probability =   1.302402e-01
 
Photon flux (15-150 keV)    in 124.1 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)  = 2.64e-06
S(50-100 keV) = 2.24e-06

T90 vs. Hardness ratio plot

T90                                   = 453.535999894142 sec.
Hardness ratio (energy fluence ratio) = 0.848485

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.882744
Count Ratio (50-100 keV) / (15-25 keV) = 0.387694

Mask shadow pattern

IMX = 6.199327220684352E-02, IMY = 5.339522143020229E-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:

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

Time interval of the image:
-12.899410 111.200600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4894  35.3233   17.7  41.5  -19.4   0.2270   0.7    1.9	Her X-1                       
288.7195  10.9706    4.9  29.6  -87.8  -0.7655  -2.3    4.9	GRS 1915+105                  
299.7860  35.1782    6.5   5.2  -41.4  -0.3607  -1.8    9.7	Cyg X-1                       
308.1919  41.0560    4.9   5.3   72.5   0.4859   2.4    7.2	Cyg X-3                       
326.2006  38.3642    5.5  16.1  131.2   0.4486   2.1    2.9	Cyg X-2                       
337.7344  50.8817    2.5  27.0  102.3   1.4038   4.6 ------	UNKNOWN                       
300.4535  35.3329    0.8   4.7  -40.7   2.9967  14.8 ------	UNKNOWN                       
238.9310  27.6759    2.7  56.6  -22.3   3.8214   4.3 ------	UNKNOWN                       
286.6953  -0.3330    2.2  40.6  -93.5   4.4198   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
146.800600 244.280000
245.000000 375.710000
377.000000 429.870000
431.000000 436.650000
438.000000 531.880000
533.000000 593.920000
595.000000 720.700000
721.000000 864.130000
865.000000 866.500000
868.000000 868.860000
870.000000 963.084600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2886  35.2200    0.0  37.3  -10.6  -1.6103  -1.0   11.1	Her X-1                       
288.6990  10.8212   52.5  26.7  -87.8   0.2991   0.2    9.5	GRS 1915+105                  
299.7180  35.0666    8.3   0.7  -48.5   1.5093   1.4   10.2	Cyg X-1                       
308.0188  41.1358   11.1   8.3  109.2  -1.1312  -1.0   11.7	Cyg X-3                       
325.9944  38.3809    9.2  20.6  139.7   1.4831   1.3    9.1	Cyg X-2                       
300.4324  35.2809    0.7   0.1  -99.8  17.6625  17.0 ------	UNKNOWN                       
235.5477  25.9348    2.4  55.7  -14.7  14.7175   4.8 ------	UNKNOWN                       
292.4059  -5.4419    2.4  41.5 -102.1  24.3719   4.8 ------	UNKNOWN

Plot creation:
Fri Dec 29 10:16:09 EST 2023