batgrbproduct analysis for trigger=1218399

batgrbproduct Analysis for Trigger=1218399

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sun Mar  3 20:46:46 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1218399/GCN5_download_cron
======================================================================

  Trigger: 01218399      Segment: 000

  BAT Trigger Time: 731107728   [s; MET]
      Trigger Stop: 731107792   [s; MET]
               UTC: 2024-03-02T21:28:14.984320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 298.52091140413   Dec: 35.6979009657571  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    15.32
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    15.32

  Flight Position:   [ source = BAT ]
    RA: 298.52091140413   Dec: 35.6979009657571  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 298.52684206254   Dec: 35.6962248576481  [deg; J2000]  
        { 19h 54m 06.4s , +35d 41' 46.4" }
         +/- 1.10852672791193 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.39243278279171 [arcmin] (formal 1-sigma fit error)
    SNR: 26.2539879455951
 
  Angular difference between Flight and Ground position is 0.305981 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 390 +/- 45.6207189772366
        Measured from: -150
                   to: 240     [s; relative to TRIGTIME]
     T50: 190 +/- 34.6554469023269
        Measured from: -28
                   to: 162     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 63     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -190     
                   to: 260     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     5.688757   6.908059   4.221783   0.691807
           0.134338   0.136961   0.116232   0.097723 [error]
 Peak      0.025594   0.032094   0.014501   0.000362
           0.006571   0.006682   0.005889   0.004646 [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 1.78e-06 2.73e-06 3.15e-06 6.98e-06 9.73e-06 1.46e-05   erg/cm2
              Error 9.05e-08 7.98e-08 1.19e-07 5.84e-07 2.80e-07 6.62e-07   erg/cm2
Peak flux Power-law 2.67e-01 1.93e-01 9.21e-02 6.21e-02 5.82e-01 6.15e-01   ph/cm2/s
              Error 8.87e-02 5.08e-02 4.35e-02 5.56e-02 1.48e-01 1.62e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.65e-06 2.81e-06 3.20e-06 4.09e-06 9.41e-06 1.17e-05   erg/cm2
              Error 1.15e-07 9.08e-08 1.27e-07 1.19e-06 3.32e-07 1.25e-06   erg/cm2
Peak flux Cutoff-PL 2.64e-01 1.99e-01 9.13e-02 4.29e-02 5.79e-01 5.97e-01   ph/cm2/s
              Error 9.28e-02 6.15e-02 6.91e-02 4.39e-02 1.48e-01 1.26e-01   ph/cm2/s
 
Fluence        Band 1.63e-06 2.80e-06 3.20e-06 4.42e-06 9.41e-06 1.22e-05   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    1.794    0.053    -      -           2.36e-03 6.65e-05   59.580 57
CPL   1.410    0.224      77.3   24.1      3.65e-03 9.18e-04   50.300 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.066    0.509    -      -           3.76e-03 1.36e-03   46.600 57
CPL   1.841    1.272      27.9    0.0      5.15e-03 0.00e+00   46.540 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  450.000 -190.000  260.000
T90   390.000 -150.000  240.000
T50   190.000  -28.000  162.000
Peak    1.000   63.000   64.000
  • 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
      298.5268 +35.6962 0.0073    0.1   88.6      16.7686    26.3  TRIG_01218399       
    ------------------------------------------
     
    Foreground time interval of the image:
    -176.499 -143.960 (delta_t =  32.539 [sec])
    -143.000 -93.100 (delta_t =  49.900 [sec])
    -92.000 -52.990 (delta_t =  39.010 [sec])
    -52.000 260.000 (delta_t = 312.000 [sec])
    Background time interval of the image:
    

    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

    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:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    -190.000000 -143.960000
    -143.000000 -93.100000
    -92.000000 -52.990000
    -52.000000 260.000000
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.79418     ( -0.0532187   0.0535079 )
    Norm@50keV  : 2.36417E-03    ( -6.66066e-05   6.64876e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          59.58 using 59 PHA bins.
    # Reduced chi-squared =          1.045 for     57 degrees of freedom 
    # Null hypothesis probability =   3.818884e-01
     
    Photon flux (15-150 keV)    in 447 sec: 0.325047 ( -0.00979918  0.00983478 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.73092e-06 ( -2.79405e-07  2.79957e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    -190.000000 -143.960000
    -143.000000 -93.100000
    -92.000000 -52.990000
    -52.000000 260.000000
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.41018     ( -0.230115   0.218821 )
    Epeak [keV] : 77.3214      ( -12.2875 35.902 )
    Norm@50keV  : 3.64663E-03    ( -0.000779753   0.00105681 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.30 using 59 PHA bins.
    # Reduced chi-squared =         0.8982 for     56 degrees of freedom 
    # Null hypothesis probability =   6.894427e-01
     
    Photon flux (15-150 keV)    in 447 sec: 0.315018 ( -0.00559  0.011184 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.41212e-06 ( -3.31629e-07  3.3145e-07 ) ergs/cm2
     
    
    Band function
    Multiple GTIs in the spectrum
    tstart tstop
    -190.000000 -143.960000
    -143.000000 -93.100000
    -92.000000 -52.990000
    -52.000000 260.000000
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.41122   ( -0.216516   0.153949 )
    beta        : -9.10875    ( 9.26584   19.2658 )
    Epeak [keV] : 77.4010      ( -10.1604 18.5985 )
    Norm@50keV   : 3.64146E-03    ( -0.000748954   0.000796886 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.30 using 59 PHA bins.
    # Reduced chi-squared =         0.9146 for     55 degrees of freedom 
    # Null hypothesis probability =   6.544290e-01
     
    Photon flux (15-150 keV)    in 447 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.40676e-06 ( 0  0 ) ergs/cm2
     
    
    Single BB
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 13.5351  (  )
    R^2/D10^2   : 4.72609E-02  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =         302.14 using 59 PHA bins.
    # Reduced chi-squared =         5.3007 for     57 degrees of freedom 
    # Null hypothesis probability =   4.432146e-35
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.196e-07   4.537e-08
    25- 50  2.946e-06   9.968e-08
    50-150  3.491e-06   2.016e-07
    15-150  7.256e-06   2.302e-07
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 117.275       (-15.2556      13.5707)
    Norm        : 1.34720       (-0.0500296     0.0689561)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.629e-06   1.044e-07
    25- 50  2.862e-06   1.198e-07
    50-150  4.851e-06   1.110e-06
    15-150  9.342e-06   1.158e-06
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.54425        (-0.681388      0.72973)
    R1^2/D10^2  : 0.450396        (-0.140271      0.228304)
    kT2 [keV]   : 22.1217        (-1.96769      2.55137)
    R2^2/D10^2  : 5.95258E-03    (-0.00210186   0.00273146)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.525e-06   1.433e-07
    25- 50  2.814e-06   1.678e-07
    50-150  4.862e-06   4.345e-07
    15-150  9.200e-06   5.722e-07
    

    Peak spectrum fit

    Power-law model
    Time interval is from   63.000 sec. to   64.000 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 2.06633     ( -0.462648   0.55496 )
    Norm@50keV  : 3.76138E-03    ( -0.00139767   0.00132407 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.60 using 59 PHA bins.
    # Reduced chi-squared =         0.8175 for     57 degrees of freedom 
    # Null hypothesis probability =   8.357154e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.582120 ( -0.14794  0.147998 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.48422e-08 ( -1.12117e-08  1.1965e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   63.000 sec. to   64.000 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.84125     ( -2.27721   0.267092 )
    Epeak [keV] : 27.9454      (   )
    Norm@50keV  : 5.15078E-03    (     )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.54 using 59 PHA bins.
    # Reduced chi-squared =         0.8310 for     56 degrees of freedom 
    # Null hypothesis probability =   8.122408e-01
     
    Photon flux (15-150 keV)    in 1 sec: 0.578893 ( -0.147634  0.14924 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.39824e-08 ( -1.2235e-08  1.26444e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   63.000 sec. to   64.000 sec.
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.98693   ( -6.6737   1.98692 )
    beta        : -9.37162    ( 9.37167   19.3717 )
    Epeak [keV] : 7.17164      ( -6.3759 -7.05613 )
    Norm@50keV   : 4.17630E-03    ( -0.00123427   0.215462 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          46.57 using 59 PHA bins.
    # Reduced chi-squared =         0.8466 for     55 degrees of freedom 
    # Null hypothesis probability =   7.837614e-01
     
    Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 3.38228e-08 ( 0  0 ) ergs/cm2
     
    
    Single BB
     XSPEC: quit
     
     
    Spectral model blackbody:
    ------------------------------------------------------------
    Parameters  : value    Lower 90%  Upper 90%
    kT [keV]    : 7.66789  (-2.18683  3.66967)
    R^2/D10^2   : 0.740176  (-0.73697   2.10114)
    (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  7.612e-09   4.681e-09
    25- 50  1.236e-08   7.540e-09
    50-150  2.817e-09   2.230e-09
    15-150  2.279e-08   1.340e-08
    
    Thermal bremsstrahlung (OTTB)
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 57.5866       (-31.3041      114.178)
    Norm        : 3.12216       (-1.10576     2.04183)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.792e-09   3.445e-09
    25- 50  1.171e-08   6.322e-09
    50-150  1.287e-08   1.009e-08
    15-150  3.237e-08   1.681e-08
    
    Double BB
    XSPEC12>exit
     XSPEC: quit
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 5.25486        (-2.13079      2.6733)
    R1^2/D10^2  : 2.61774        (-2.07541      20.3424)
    kT2 [keV]   : 21.3897        (-10.6397      57.57)
    R2^2/D10^2  : 1.04660E-02    (-0.0101881   0.135473)
    ------------------------------------------------------------
     Reduced chi-squared = 
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.633e-09   5.245e-09
    25- 50  1.037e-08   5.510e-09
    50-150  1.622e-08   1.138e-08
    15-150  3.522e-08   1.789e-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: 1.79354     ( -0.0536146   0.0539166 )
    Norm@50keV  : 2.36565E-03    ( -6.74498e-05   6.73249e-05 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          60.74 using 59 PHA bins.
    # Reduced chi-squared =          1.066 for     57 degrees of freedom 
    # Null hypothesis probability =   3.428303e-01
     
    Photon flux (15-150 keV)    in 433.4 sec: 0.325169 ( -0.00987978  0.00991455 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.44093e-06 ( -2.74414e-07  2.74986e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.37629     ( -0.23441   0.2227 )
    Epeak [keV] : 75.0709      ( -11.1312 29.1926 )
    Norm@50keV  : 3.79203E-03    ( -0.000825302   0.00112586 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.09 using 59 PHA bins.
    # Reduced chi-squared =         0.8945 for     56 degrees of freedom 
    # Null hypothesis probability =   6.969451e-01
     
    Photon flux (15-150 keV)    in 433.4 sec: 0.314402 ( -0.011205  0.011258 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.10547e-06 ( -3.25527e-07  3.25613e-07 ) ergs/cm2
     
    
    Band function
     
    Spectral model in the Band function:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    alpha       : -1.38565   ( -0.210986   0.174279 )
    beta        : -9.37131    ( 9.37164   19.3716 )
    Epeak [keV] : 75.8763      ( -9.8673 15.6397 )
    Norm@50keV   : 3.74727E-03    ( -0.000782153   0.000335221 )
    ------------------------------------------------------------
    #Fit statistic : Chi-Squared =          50.10 using 59 PHA bins.
    # Reduced chi-squared =         0.9109 for     55 degrees of freedom 
    # Null hypothesis probability =   6.619807e-01
     
    Photon flux (15-150 keV)    in 433.4 sec: 0.314613 (    ) ph/cm2/s
    Energy fluence (15-150 keV)             : 9.0998e-06 ( 0  0 ) ergs/cm2
     
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 2.73e-06
    S(50-100 keV) = 3.15e-06
    

    T90 vs. Hardness ratio plot

    T90                                   = 390 sec.
    Hardness ratio (energy fluence ratio) = 1.15385
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.21434
    Count Ratio (50-100 keV) / (15-25 keV) = 0.742127
    

    Mask shadow pattern

    IMX = 5.221821885309541E-05, IMY = -2.071865378227748E-03
    

    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:
    -119.000000 -110.270000
    -109.000000 -95.636000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.2915  35.2444    7.1  35.8   67.6  -0.2502  -1.6   10.0	Her X-1                       
    268.3639  -1.3121    8.4  46.5    8.9   0.1661   1.4    8.4	SW J1753.5-0127               
    274.0659 -14.0347    8.8  54.8   -5.5   0.2678   1.3    3.5	GX 17+2                       
    288.7665  10.7915    5.6  26.4  -12.8  -0.1338  -2.1    9.4	GRS 1915+105                  
    299.5309  35.1760    5.6   0.9  -93.1   0.1240   2.0    3.3	Cyg X-1                       
    308.2237  41.0118    8.1   9.2 -163.6   0.0931   1.4    6.2	Cyg X-3                       
    326.1069  38.1441    5.0  22.0 -139.8  -0.1605  -2.3   11.1	Cyg X-2                       
    298.5840  35.6597    0.7   0.1   85.1   0.9904  16.8 ------	UNKNOWN                       
    354.1916  55.5310    2.3  42.2 -171.1   0.4822   5.0 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -176.499410 -143.960000
    -143.000000 -93.100000
    -92.000000 -52.990000
    -52.000000 260.000000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    254.2978  35.2432   25.3  35.8   67.6  -0.7614  -0.5    9.8	Her X-1                       
    268.2332  -1.5098    8.7  46.7    8.9  -1.3830  -1.3    8.8	SW J1753.5-0127               
    274.0844 -14.0790   12.2  54.9   -5.6  -1.5671  -0.9    5.2	GX 17+2                       
    288.6474  10.9272    4.6  26.3  -12.5  -1.6136  -2.5    9.0	GRS 1915+105                  
    299.8465  35.2357    0.0   1.1 -103.4  -0.7120  -1.1   12.7	Cyg X-1                       
    308.3876  40.9681    0.0   9.3 -163.0  -1.1036  -1.8   12.6	Cyg X-3                       
    326.0329  38.2238    3.4  22.0 -140.1  -2.3945  -3.4    8.8	Cyg X-2                       
    246.9780  62.5143    3.1  41.5  111.8  12.3248   3.8 ------	UNKNOWN                       
    252.6768   6.4463    3.0  51.2   31.4   7.5993   3.8 ------	UNKNOWN                       
    334.1227  65.1442    2.4  36.2  169.3   4.1682   4.7 ------	UNKNOWN                       
    298.5268  35.6962    0.4   0.1   88.6  16.7675  26.4 ------	UNKNOWN                       
    296.2139 -19.4907    1.8  55.2  -32.3  23.8774   6.5 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
     
    
    Plot creation:
    Sun Mar  3 20:49:04 EST 2024