batgrbproduct analysis for trigger=1400964

batgrbproduct Analysis for Trigger=1400964

WARNING: Good number of pixels are GAIN:49243 and OFFSET:49243 (should be 49478 for both) in the gain/offset file. Check for the gain/offset file.

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): Sat Oct  4 04:26:27 EDT 2025
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1400964/GCN5_download_cron
======================================================================

  Trigger: 01400964      Segment: 000

  BAT Trigger Time: 781149546.496   [s; MET]
      Trigger Stop: 781149547.52   [s; MET]
               UTC: 2025-10-03T01:58:30.060200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 18.5033597732436   Dec: 56.506574432146  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.18
     Image Trigger?:     NO
     Rate S/N Ratio:     15.4596248337403  [ if not an image trigger ]
     Image S/N Ratio:    8.18

  Flight Position:   [ source = BAT ]
    RA: 18.5033597732436   Dec: 56.506574432146  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 18.5003139758246   Dec: 56.4811681015168  [deg; J2000]  
        { 01h 14m 00.1s , +56d 28' 52.2" }
         +/- 1.40505177213768 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.452815323869275 [arcmin] (formal 1-sigma fit error)
    SNR: 18.7123934889274
 
  Angular difference between Flight and Ground position is 1.527714 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 10.8279999494553 +/- 2.3444845501746
        Measured from: -2.00399994850159
                   to: 8.82400000095367     [s; relative to TRIGTIME]
     T50: 3.86799991130829 +/- 0.842472602693082
        Measured from: 0.096000075340271
                   to: 3.96399998664856     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.907999992370605     
                   to: 1.90799999237061     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.41200006008148     
                   to: 9.78799998760223     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.227894   0.268653   0.177959   0.023077
           0.019744   0.020220   0.016790   0.013126 [error]
 Peak      0.028365   0.045095   0.045009   0.001917
           0.005746   0.006176   0.005060   0.003791 [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 6.18e-08 1.05e-07 1.35e-07 3.52e-07 3.99e-07 6.55e-07   erg/cm2
              Error 8.37e-09 8.82e-09 1.62e-08 8.88e-08 3.83e-08 1.03e-07   erg/cm2
Peak flux Power-law 2.62e-01 3.05e-01 2.54e-01 3.58e-01 9.50e-01 1.18e+00   ph/cm2/s
              Error 6.36e-02 4.65e-02 3.87e-02 1.11e-01 1.30e-01 1.62e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.99e-08 1.08e-07 1.37e-07 2.40e-07 3.91e-07 5.43e-07   erg/cm2
              Error 9.68e-09 1.12e-08 1.70e-08 -------- 4.36e-08 1.30e-07   erg/cm2
Peak flux Cutoff-PL 2.03e-01 3.34e-01 2.84e-01 1.27e-01 9.09e-01 9.48e-01   ph/cm2/s
              Error 8.13e-02 5.72e-02 4.90e-02 1.30e-01 1.38e-01 1.88e-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    1.632    0.150    -      -           3.51e-03 3.12e-04   66.630 57
CPL   1.400    0.514     123.0    0.0      4.65e-03 0.00e+00   66.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.259    0.218    -      -           8.02e-03 1.07e-03   70.470 57
CPL   0.047    1.267      84.9  118.4      3.07e-02 6.99e-02   66.710 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: 20.096000 sec.
T50 in the 50-300 keV band: 7.808000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.200   -2.412    9.788
T90    10.828   -2.004    8.824
T50     3.868    0.096    3.964
Peak    1.000    0.908    1.908

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
   18.5003 +56.4812 0.0102    9.7   50.3       0.7245    18.7  TRIG_01400964       
------------------------------------------
 
Foreground time interval of the image:
 -2.412   9.788 (delta_t =  12.200 [sec])
Background time interval of the image:
-239.496 -136.106 (delta_t = 103.390 [sec])
-135.496 -33.361 (delta_t = 102.135 [sec])
-32.496  -2.412 (delta_t =  30.084 [sec])

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

Time interval is from   -2.412 sec. to    9.788 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63155     ( -0.148581   0.151333 )
Norm@50keV  : 3.50914E-03    ( -0.000313267   0.000310011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.63 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     57 degrees of freedom 
# Null hypothesis probability =   1.794669e-01
 
Photon flux (15-150 keV)    in 12.2 sec: 0.455459 ( -0.0381531  0.0381865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.98931e-07 ( -3.8055e-08  3.84606e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.412 sec. to    9.788 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40008     ( -0.665008   0.362718 )
Epeak [keV] : 123.012      (   )
Norm@50keV  : 4.65122E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.20 using 59 PHA bins.
# Reduced chi-squared =          1.182 for     56 degrees of freedom 
# Null hypothesis probability =   1.653440e-01
 
Photon flux (15-150 keV)    in 12.2 sec: 0.450666 ( -0.040193  0.039985 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90796e-07 ( -4.37748e-08  4.34759e-08 ) ergs/cm2

Band function

Time interval is from   -2.412 sec. to    9.788 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.30588   ( 1.3059   5.30016 )
beta        : -1.90543    ( 1.90221   0.399119 )
Epeak [keV] : 98.1863      ( -98.1768 157.816 )
Norm@50keV   : 5.24672E-03    ( -0.00154833   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.95 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     55 degrees of freedom 
# Null hypothesis probability =   1.481374e-01
 
Photon flux (15-150 keV)    in 12.2 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]    : 13.2892  (-1.3501  1.52512)
R^2/D10^2   : 7.68208E-02  (-0.0249289   0.0363703)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.72 using 59 PHA bins.
# Reduced chi-squared =          1.714 for     57 degrees of freedom 
# Null hypothesis probability =   6.390875e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.508e-08   5.234e-09
25- 50  1.237e-07   1.340e-08
50-150  1.399e-07   2.439e-08
15-150  2.987e-07   3.379e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 156.537       (-51.4344      -156.567)
Norm        : 1.87478       (-0.172119     0.20082)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.852e-08   6.564e-09
25- 50  1.091e-07   3.652e-08
50-150  2.192e-07   1.018e-07
15-150  3.869e-07   1.378e-07

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.96991        (-1.93042      2.65456)
R1^2/D10^2  : 0.825871        (-0.561929      2.91719)
kT2 [keV]   : 21.4134        (-4.70852      14.0061)
R2^2/D10^2  : 1.10025E-02    (-0.00919552   0.0181693)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.890e-08   2.622e-08
25- 50  1.067e-07   3.342e-08
50-150  2.095e-07   1.010e-07
15-150  3.751e-07   1.376e-07

Peak spectrum fit

Power-law model

Time interval is from    0.908 sec. to    1.908 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25905     ( -0.219484   0.215601 )
Norm@50keV  : 8.02121E-03    ( -0.00106522   0.00106517 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.47 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     57 degrees of freedom 
# Null hypothesis probability =   1.083918e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.950122 ( -0.130058  0.130357 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.00866e-08 ( -1.15501e-08  1.16387e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.908 sec. to    1.908 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.71604E-02     ( -1.45938   1.07442 )
Epeak [keV] : 84.9356      ( -21.108 215.684 )
Norm@50keV  : 3.06833E-02    ( -0.0306835   0.109191 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.71 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     56 degrees of freedom 
# Null hypothesis probability =   1.548902e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.908805 ( -0.138612  0.137025 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.47405e-08 ( -1.25159e-08  1.27412e-08 ) ergs/cm2

Band function

Time interval is from    0.908 sec. to    1.908 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.253346   ( -1.10159   2.28636 )
beta        : -2.30731    ( 2.24244   0.906368 )
Epeak [keV] : 76.9540      ( -31.011 160.101 )
Norm@50keV   : 4.32341E-02    ( -0.0231555   0.370745 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.27 using 59 PHA bins.
# Reduced chi-squared =          1.205 for     55 degrees of freedom 
# Null hypothesis probability =   1.419561e-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]    : 17.5363  (-2.33171  2.84942)
R^2/D10^2   : 6.98269E-02  (-0.0283715   0.0444098)
(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  4.334e-09   1.095e-09
25- 50  1.965e-08   3.640e-09
50-150  4.356e-08   1.013e-08
15-150  6.754e-08   1.253e-08

Thermal bremsstrahlung (OTTB)

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-45.8209      -200)
Norm        : 3.96910       (-0.533194     0.533194)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.884e-09   5.580e-09
25- 50  1.901e-08   1.062e-08
50-150  4.170e-08   2.325e-08
15-150  7.060e-08   3.917e-08

Double BB

XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.14355        (-3.89403      16.4304)
R1^2/D10^2  : 3.19509        (-3.13066      875.421)
kT2 [keV]   : 19.3129        (-3.15141      -19.3159)
R2^2/D10^2  : 4.75921E-02    (-0.0449433   0.0163482)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.907e-09   3.245e-09
25- 50  1.824e-08   5.983e-09
50-150  4.642e-08   1.861e-08
15-150  7.157e-08   2.120e-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: 1.63155     ( -0.148581   0.151333 )
Norm@50keV  : 3.50914E-03    ( -0.000313267   0.000310011 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.63 using 59 PHA bins.
# Reduced chi-squared =          1.169 for     57 degrees of freedom 
# Null hypothesis probability =   1.794669e-01
 
Photon flux (15-150 keV)    in 12.2 sec: 0.455459 ( -0.0381531  0.0381865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.98931e-07 ( -3.8055e-08  3.84606e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40008     ( -0.665008   0.362718 )
Epeak [keV] : 123.012      (   )
Norm@50keV  : 4.65122E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.20 using 59 PHA bins.
# Reduced chi-squared =          1.182 for     56 degrees of freedom 
# Null hypothesis probability =   1.653440e-01
 
Photon flux (15-150 keV)    in 12.2 sec: 0.450666 ( -0.040193  0.039985 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90796e-07 ( -4.37748e-08  4.34759e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.30588   ( 1.3059   5.78952 )
beta        : -1.90543    ( 1.90221   0.399119 )
Epeak [keV] : 98.1863      ( -98.1768 157.816 )
Norm@50keV   : 5.24672E-03    ( -0.00154833   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.95 using 59 PHA bins.
# Reduced chi-squared =          1.199 for     55 degrees of freedom 
# Null hypothesis probability =   1.481374e-01
 
Photon flux (15-150 keV)    in 12.2 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)  = 1.05e-07
S(50-100 keV) = 1.35e-07

T90 vs. Hardness ratio plot

T90                                   = 10.8279999494553 sec.
Hardness ratio (energy fluence ratio) = 1.28571

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.17885
Count Ratio (50-100 keV) / (15-25 keV) = 0.780885

Mask shadow pattern

IMX = 1.091014670656578E-01, IMY = -1.312541279139296E-01

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:
-239.496000 -136.106000
-135.496000 -33.360800
-32.496000 -2.412000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5797  35.1934    0.9  48.6 -177.9   9.3591  12.2    0.7	Cyg X-1                       
308.0228  41.0191    4.4  40.1  178.8   1.5814   2.6    5.6	Cyg X-3                       
326.0712  38.1899    4.4  35.0  157.1   1.4614   2.6    9.2	Cyg X-2                       
261.9057  50.7036    2.9  51.1 -136.9   6.3149   3.9 ------	UNKNOWN                       
227.9401  71.3138    3.0  41.7 -103.6   5.1011   3.8 ------	UNKNOWN

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

Time interval of the image:
-2.412000 9.788000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6553  35.1337   41.3  48.7 -178.0  -0.0232  -0.3    5.2	Cyg X-1                       
308.1903  40.8979    6.6  40.1  178.6  -0.0975  -1.8    4.9	Cyg X-3                       
326.1867  38.4490    5.4  34.7  157.1  -0.1163  -2.2    7.7	Cyg X-2                       
316.0975  26.1227    2.3  49.5  159.8   0.6595   5.0 ------	UNKNOWN                       
 18.5003  56.4812    0.6   9.7   50.3   0.7245  18.7 ------	UNKNOWN                       
281.7140  54.1879    2.1  41.1 -147.3   0.3382   5.5 ------	UNKNOWN                       
256.6654  56.4904    2.4  48.0 -129.3   0.8374   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
56.704600 117.684000
118.504000 303.634000
304.504000 448.184000
449.504000 474.504600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6214  35.1842    1.4  55.4 -178.2  15.9891   8.1    1.8	Cyg X-1                       
308.1775  40.9655    5.1  46.6 -179.4   2.9567   2.3    3.1	Cyg X-3                       
326.2619  38.2218    9.3  38.6  163.2   1.2109   1.2    7.3	Cyg X-2                       
 37.9222  43.3767    3.9  18.0   27.3   1.5186   3.0 ------	UNKNOWN                       
 44.7999  73.6591    3.8  20.0  -80.0   2.4448   3.1 ------	UNKNOWN                       
286.3459  63.7666    3.0  42.4 -142.3   4.3373   3.8 ------	UNKNOWN

Plot creation:
Sat Oct  4 04:32:01 EDT 2025