batgrbproduct analysis for trigger=1193078

batgrbproduct Analysis for Trigger=1193078

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Tue Dec 26 23:45:27 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1193078
======================================================================

  Trigger: 01193078      Segment: 000

  BAT Trigger Time: 720158981.824   [s; MET]
      Trigger Stop: 720158982.848   [s; MET]
               UTC: 2023-10-28T04:09:09.558200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 214.028595171049   Dec: 20.895108866395  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    18.14
     Image Trigger?:     NO
     Rate S/N Ratio:     63.8435587980495  [ if not an image trigger ]
     Image S/N Ratio:    18.14

  Flight Position:   [ source = BAT ]
    RA: 214.028595171049   Dec: 20.895108866395  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 214.016025587511   Dec: 20.8962990595041  [deg; J2000]  
        { 14h 16m 03.8s , +20d 53' 46.7" }
         +/- 0.660372346519235 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.208380794021293 [arcmin] (formal 1-sigma fit error)
    SNR: 55.0253532216429
 
  Angular difference between Flight and Ground position is 0.708184 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: 37.1119999885559 +/- 0.963676301549326
        Measured from: -2.03600001335144
                   to: 35.0759999752045     [s; relative to TRIGTIME]
     T50: 14.8839999437332 +/- 1.2932130348325
        Measured from: 1.81599998474121
                   to: 16.6999999284744     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.05999994277954     
                   to: 2.05999994277954     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.85599994659424     
                   to: 41.4880000352859     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.672219   4.003069   3.291326   0.882934
           0.063203   0.068044   0.061356   0.046276 [error]
 Peak      0.204860   0.370049   0.401464   0.119373
           0.012157   0.015003   0.015340   0.010543 [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 8.60e-07 1.69e-06 2.56e-06 8.46e-06 7.20e-06 1.36e-05   erg/cm2
              Error 4.04e-08 4.56e-08 6.52e-08 5.09e-07 1.63e-07 5.35e-07   erg/cm2
Peak flux Power-law 6.06e-04 7.25e-03 1.06e-01 9.58e+00 4.97e-01 9.60e+00   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 8.41e-07 1.69e-06 2.59e-06 7.59e-06 7.15e-06 1.27e-05   erg/cm2
              Error 5.11e-08 4.74e-08 7.60e-08 1.20e-06 1.75e-07 1.22e-06   erg/cm2
Peak flux Cutoff-PL 1.90e+00 2.76e+00 2.63e+00 2.77e+00 8.55e+00 1.01e+01   ph/cm2/s
              Error 2.21e-01 1.51e-01 1.53e-01 7.94e-01 3.88e-01 8.75e-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    1.396    0.042    -      -           1.54e-02 3.38e-04   40.900 57
CPL   1.311    0.149     466.2    0.0      1.68e-02 2.27e-03   40.090 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.099    0.073    -      -           7.48e-02 3.19e-03   54.090 57
CPL   0.692    0.308     181.9  180.9      1.15e-01 3.69e-02   48.510 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: 35.008000 sec.
T50 in the 50-300 keV band: 6.400000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   48.344   -6.856   41.488
T90    37.112   -2.036   35.076
T50    14.884    1.816   16.700
Peak    1.000    1.060    2.060
  • 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
      214.0160    20.8963   0.0035    26.6878  -118.5304        10.8028289     55.025 TRIG_01193078                 
     
    Foreground time interval of the image:
     -6.856  41.488 (delta_t =  48.344 [sec])
    Background time interval of the image:
    -239.824  -6.856 (delta_t = 232.968 [sec])
    

    Lightcurves

    Notes:

    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:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -6.856 sec. to   41.488 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.39627     ( -0.0418273   0.041754 )
    Norm@50keV  : 1.53833E-02    ( -0.00033816   0.000338 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   40.90     using 59 bins.
     Reduced chi-squared = 0.717544
    # Null hypothesis probability of 9.47e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 48.34 sec: 1.87186 ( -0.04647  0.0466 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.19178e-06 ( -1.63057e-07  1.63284e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   -6.856 sec. to   41.488 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.31098     ( -0.16599   0.131976 )
    Epeak [keV] : 466.230      ( -466.317 -466.317 )
    Norm@50keV  : 1.67634E-02    ( -0.00158525   0.00296071 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   40.09     using 59 bins.
     Reduced chi-squared = 0.715893
    # Null hypothesis probability of 9.46e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 48.34 sec: 1.85964 ( -0.05142  0.04418 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.15727e-06 ( -1.75641e-07  1.73789e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from   -6.856 sec. to   41.488 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]    : 18.5624  (  )
    R^2/D10^2   : 0.100875  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                  473.75     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 5.25e-67 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.330e-07   1.629e-08
    25- 50  1.575e-06   5.293e-08
    50-150  3.969e-06   1.298e-07
    15-150  5.877e-06   1.474e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (-3.36373      -200)
    Norm        : 7.87342       (-0.172915     0.172915)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                  104.54     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 1.26e-04 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  9.480e-07   2.562e-08
    25- 50  1.824e-06   4.713e-08
    50-150  4.000e-06   9.354e-08
    15-150  6.771e-06   1.740e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 8.28904        (-0.682764      0.723593)
    R1^2/D10^2  : 1.02257        (-0.243133      0.342024)
    kT2 [keV]   : 32.8182        (-2.86601      3.7336)
    R2^2/D10^2  : 1.19829E-02    (-0.00360427   0.00443538)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   45.30     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 8.22e-01 with 55 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.220e-07   5.632e-08
    25- 50  1.760e-06   7.541e-08
    50-150  4.649e-06   2.586e-07
    15-150  7.131e-06   3.335e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from    1.060 sec. to    2.060 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.09917     ( -0.0727357   0.0724604 )
    Norm@50keV  : 7.48012E-02    ( -0.00318858   0.00318798 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   54.09     using 59 bins.
     Reduced chi-squared = 0.948947
    # Null hypothesis probability of 5.85e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 1 sec: 0.497246 (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.82348e-07 ( -3.68783e-08  3.7003e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from    1.060 sec. to    2.060 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.691601     ( -0.317971   0.297198 )
    Epeak [keV] : 181.894      ( -55.7081 306.155 )
    Norm@50keV  : 0.114678    ( -0.0300675   0.0437501 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   48.51     using 59 bins.
     Reduced chi-squared = 0.86625
    # Null hypothesis probability of 7.51e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 1 sec: 8.55463 ( -0.38813  0.38826 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.69272e-07 ( -3.87892e-08  3.86511e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from    1.060 sec. to    2.060 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]    : 20.3581  (  )
    R^2/D10^2   : 0.395948  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                  127.67     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 2.47e-07 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.141e-08   2.825e-09
    25- 50  1.583e-07   9.500e-09
    50-150  4.874e-07   3.545e-08
    15-150  6.771e-07   3.440e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 199.363       (      )
    Norm        : 35.3426       (     )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                  154.34     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 6.58e-11 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.801e-08   4.260e-09
    25- 50  1.693e-07   7.600e-09
    50-150  3.713e-07   1.850e-08
    15-150  6.286e-07   2.985e-08
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 8.13491        (-1.73663      2.17775)
    R1^2/D10^2  : 3.66891        (-1.74971      4.13563)
    kT2 [keV]   : 30.6053        (-4.16407      7.64346)
    R2^2/D10^2  : 8.96371E-02    (-0.04769   0.0601236)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   50.99     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 6.29e-01 with 55 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  5.742e-08   1.122e-08
    25- 50  1.607e-07   2.350e-08
    50-150  5.518e-07   8.675e-08
    15-150  7.699e-07   1.110e-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: 1.39627     ( -0.0418273   0.041754 )
    Norm@50keV  : 1.53833E-02    ( -0.00033816   0.000338 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   40.90     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 9.47e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 48.34 sec: 1.87182 ( -0.0464595  0.0466044 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.19096e-06 ( -1.63037e-07  1.63158e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.31095     ( -0.165984   0.13198 )
    Epeak [keV] : 465.989      ( -466.314 -466.314 )
    Norm@50keV  : 1.67640E-02    ( -0.00155646   0.00296631 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   40.09     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 9.46e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 48.34 sec: 1.85943 ( -0.0514  0.02454 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 7.16012e-06 ( -1.76103e-07  1.71752e-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)  = 1.69e-06
    S(50-100 keV) = 2.56e-06
    

    T90 vs. Hardness ratio plot

    T90                                   = 37.1119999885559 sec.
    Hardness ratio (energy fluence ratio) = 1.51479
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.49803
    Count Ratio (50-100 keV) / (15-25 keV) = 1.23168
    

    Mask shadow pattern

    IMX = -2.400934082089464E-01, IMY = 4.416380570985167E-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:
    -239.824000 -6.856000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.5226  35.4050    5.0  52.6 -165.5  -2.0810  -2.3    4.9	Her X-1                       
    136.5775  31.4181    3.0  43.0   44.9   3.6939   3.8 ------	UNKNOWN                       
    225.9626  69.2944    3.0  39.4  144.8   3.5859   3.9 ------	UNKNOWN                       
    192.9297  31.9682    2.5   5.1 -101.7   1.4251   4.6 ------	UNKNOWN                       
    174.5850   1.3798    2.4  36.6  -31.2   2.1040   4.9 ------	UNKNOWN                       
    235.7458  12.8781    2.8  48.1 -129.1   5.8884   4.1 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -6.856000 41.488000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.4371  35.3913    4.6  52.6 -165.5  -1.0984  -2.5    3.1	Her X-1                       
    180.7581  72.9860    3.9  37.6  121.3   1.2007   3.0 ------	UNKNOWN                       
    268.1177  60.1477    3.8  54.7  161.8   2.7659   3.0 ------	UNKNOWN                       
    230.2473  31.9487    2.8  34.6 -151.3   0.7789   4.2 ------	UNKNOWN                       
    240.6745  32.3449    2.1  42.9 -156.4   1.3480   5.5 ------	UNKNOWN                       
    214.0160  20.8963    0.2  26.7 -118.5  10.8021  55.0 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    345.876600 962.234600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    244.8805 -15.7264    0.3  23.8  -56.9  46.9828  34.1    7.7	Sco X-1                       
    255.9925 -37.9078    1.3  12.4 -134.7  10.8399   9.0    3.8	4U 1700-377                   
    256.2537 -36.2695    0.0  11.2 -129.3   0.8738   0.7   12.7	GX 349+2                      
    262.8414 -24.6807    8.8   5.3  -33.1   1.6493   1.3    9.9	GX 1+4                        
    264.9577 -44.5927    0.0  15.7 -172.3  -1.3242  -1.2   12.6	4U 1735-44                    
    268.4730  -1.4032    5.4  27.6    8.5   3.3927   2.1    7.0	SW J1753.5-0127               
    270.2426 -24.9325   58.9   5.3   45.4   0.2457   0.2    9.1	GX 5-1                        
    270.4852 -25.8770    0.0   4.8   54.7  -1.6132  -1.3   12.7	GRS 1758-258                  
    274.1433 -14.1720    7.3  16.5   31.5   2.0067   1.6   11.4	GX 17+2                       
    275.8285 -30.3267    7.5   8.3  105.7   1.8982   1.5    5.6	H1820-303                     
    285.1206 -25.0505    8.0  17.1   85.2  -2.3034  -1.4    9.1	HT1900.1-2455                 
    288.9114  11.0000    8.5  45.5   35.8   4.4271   1.4    7.4	GRS 1915+105                  
    262.8152 -33.9664    3.0   5.8 -145.7   4.7814   3.8   11.7	GX 354-0                      
    314.9655 -54.0148    2.7  43.0  143.7  16.0972   4.4 ------	UNKNOWN                       
    
    Plot creation:
    Tue Dec 26 23:51:39 EST 2023