batgrbproduct analysis for trigger=338895

batgrbproduct Analysis for Trigger=338895

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 v2.46
    Process Start Time (local time): Sat May  9 19:04:13 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger338895
======================================================================

  Trigger: 00338895      Segment: 000

  BAT Trigger Time: 252557749.248   [s; MET]
      Trigger Stop: 252557751.296   [s; MET]
               UTC: 2009-01-02T02:55:44.865380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 128.258919212618   Dec: 33.0915130874167  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.37
     Image Trigger?:     NO
     Rate S/N Ratio:     77.517739905134  [ if not an image trigger ]
     Image S/N Ratio:    9.37

  Flight Position:   [ source = BAT ]
    RA: 128.258919212618   Dec: 33.0915130874167  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 128.247387036973   Dec: 33.1077849115167  [deg; J2000]  
        { 08h 32m 59.4s , +33d 06' 28.0" }
         +/- 1.26481692995552 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.550582427740074 [arcmin] (formal 1-sigma fit error)
    SNR: 21.7452580368133
 
  Angular difference between Flight and Ground position is 1.135416 arcmin
 
  Partial Coding Fraction: 0.06835938    [ including projection effects ]

  Duration
     T90: 28.3199999928474 +/- 2.34567860066996
        Measured from: -11.6960000097752
                   to: 16.6239999830723     [s; relative to TRIGTIME]
     T50: 12.0639999806881 +/- 1.51898913226029
        Measured from: -6.52799999713898
                   to: 5.53599998354912     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.68400001525879     
                   to: 2.68400001525879     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.255999982357     
                   to: 22.7520000040531     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.059411   3.418273   3.105243   1.472189
           0.142032   0.155431   0.148263   0.125256 [error]
 Peak      0.084086   0.234566   0.285712   0.135476
           0.024096   0.030848   0.034590   0.030165 [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 7.80e-07 1.59e-06 2.54e-06 9.04e-06 7.06e-06 1.40e-05   erg/cm2
              Error 7.47e-08 9.01e-08 1.47e-07 1.19e-06 3.68e-07 1.26e-06   erg/cm2
Peak flux Power-law 1.13e+00 1.62e+00 1.72e+00 3.38e+00 5.53e+00 7.86e+00   ph/cm2/s
              Error 3.20e-01 2.84e-01 2.56e-01 1.07e+00 7.87e-01 1.24e+00   ph/cm2/s
 
Fluence   Cutoff-PL 7.70e-07 1.60e-06 2.56e-06 8.36e-06 7.05e-06 1.33e-05   erg/cm2
              Error 6.94e-08 9.68e-08 1.64e-07 2.47e-06 2.89e-07 1.96e-06   erg/cm2
Peak flux Cutoff-PL 9.81e-01 1.69e+00 1.85e+00 1.93e+00 5.45e+00 6.46e+00   ph/cm2/s
              Error 3.84e-01 3.20e-01 3.35e-01 1.87e+00 7.98e-01 1.71e+00   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    1.326    0.087    -      -           1.94e-02 9.40e-04   55.840 57
CPL   1.237    0.223     438.6  -75.4      2.14e-02 5.27e-03   55.910 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.914    0.234    -      -           4.82e-02 6.83e-03   64.670 57
CPL   0.323    0.934     161.2    0.0      8.87e-02 1.21e-01   63.560 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: 25.472000 sec.
T50 in the 50-300 keV band: 9.664000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   37.008  -14.256   22.752
T90    28.320  -11.696   16.624
T50    12.064   -6.528    5.536
Peak    1.000    1.684    2.684

Click here for the BAT GCN circular template

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  128.2474    33.1078   0.0089    45.2149    46.1530        10.7360376     21.745 TRIG_00338895                 
 
Foreground time interval of the image:
-14.256  22.752 (delta_t =  37.008 [sec])
Background time interval of the image:
-239.248 -14.256 (delta_t = 224.992 [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 2.048000

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 2.048000

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 2.048000

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  -14.256 sec. to   22.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32607     ( -0.0875823   0.0873017 )
Norm@50keV  : 1.94311E-02    ( -0.000939982   0.000939932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.84 using 59 PHA bins.
# Reduced chi-squared =         0.9797 for     57 degrees of freedom 
# Null hypothesis probability =   5.186218e-01
 
Photon flux (15-150 keV)    in 37.01 sec: 2.32969 ( -0.120286  0.1207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.06232e-06 ( -3.67056e-07  3.68258e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -14.256 sec. to   22.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23661     ( -0.350656   0.0959444 )
Epeak [keV] : 438.626      ( -621.705 -772.573 )
Norm@50keV  : 2.13637E-02    ( -0.00186147   0.00868243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.91 using 59 PHA bins.
# Reduced chi-squared =         0.9985 for     56 degrees of freedom 
# Null hypothesis probability =   4.781279e-01
 
Photon flux (15-150 keV)    in 37.01 sec: 2.32269 ( -0.1248  0.12496 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.04589e-06 ( -3.85607e-07  1.92304e-07 ) ergs/cm2

Band function

Time interval is from  -14.256 sec. to   22.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.871497   ( 0.877106   0.877106 )
beta        : -1.38278    ( 1.38262   0.132176 )
Epeak [keV] : 96.6698      ( -98.5102 495.314 )
Norm@50keV   : 3.54635E-02    ( -0.0159531   2.29224 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     55 degrees of freedom 
# Null hypothesis probability =   4.687764e-01
 
Photon flux (15-150 keV)    in 37.01 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]    : 18.0705  (  )
R^2/D10^2   : 0.142908  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         155.34 using 59 PHA bins.
# Reduced chi-squared =         2.7253 for     57 degrees of freedom 
# Null hypothesis probability =   4.751620e-11
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.454e-07   3.314e-08
25- 50  1.602e-06   1.155e-07
50-150  3.801e-06   3.059e-07
15-150  5.748e-06   3.423e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 9.77348       (-0.477585     0.477465)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.77 using 59 PHA bins.
# Reduced chi-squared =          1.382 for     57 degrees of freedom 
# Null hypothesis probability =   2.964427e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.010e-07   5.107e-08
25- 50  1.733e-06   1.027e-07
50-150  3.801e-06   2.459e-07
15-150  6.435e-06   4.441e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.05320        (-1.43047      1.5238)
R1^2/D10^2  : 0.990902        (-0.370186      0.708309)
kT2 [keV]   : 38.6424        (-7.99439      15.8769)
R2^2/D10^2  : 9.34067E-03    (-0.0058007   0.0104526)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.57 using 59 PHA bins.
# Reduced chi-squared =          1.029 for     55 degrees of freedom 
# Null hypothesis probability =   4.161016e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.553e-07   1.044e-07
25- 50  1.720e-06   2.839e-07
50-150  4.708e-06   1.418e-06
15-150  7.083e-06   1.525e-06

Peak spectrum fit

Power-law model

Time interval is from    1.684 sec. to    2.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.914033     ( -0.23827   0.229788 )
Norm@50keV  : 4.81874E-02    ( -0.00684933   0.00681353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.67 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     57 degrees of freedom 
# Null hypothesis probability =   2.265948e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.53172 ( -0.786787  0.788177 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.3787e-07 ( -8.13962e-08  8.18987e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.684 sec. to    2.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.322995     ( -1.16623   0.702625 )
Epeak [keV] : 161.170      ( -162.076 -162.076 )
Norm@50keV  : 8.87396E-02    ( -0.0419094   0.200047 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.56 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     56 degrees of freedom 
# Null hypothesis probability =   2.276442e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.45157 ( -0.79742  0.79832 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.25828e-07 ( -8.7949e-08  8.5853e-08 ) ergs/cm2

Band function

Time interval is from    1.684 sec. to    2.684 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -1.14054    ( -0.425188   0.305414 )
Epeak [keV] : 37.8007      ( -12.0991 19.8529 )
Norm@50keV   : 308.473    ( -42.4061   4226.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.68 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     55 degrees of freedom 
# Null hypothesis probability =   2.495672e-01
 
Photon flux (15-150 keV)    in 1 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]    : 21.9119  (-3.70026  4.91357)
R^2/D10^2   : 0.209781  (-0.0977994   0.165175)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.98 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     57 degrees of freedom 
# Null hypothesis probability =   1.328337e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.867e-08   5.310e-09
25- 50  9.851e-08   2.163e-08
50-150  3.534e-07   8.755e-08
15-150  4.705e-07   1.064e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 21.6785       (-3.23693     3.2369)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.36 using 59 PHA bins.
# Reduced chi-squared =          1.462 for     57 degrees of freedom 
# Null hypothesis probability =   1.297899e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.397e-08   3.057e-08
25- 50  1.038e-07   5.870e-08
50-150  2.277e-07   1.278e-07
15-150  3.855e-07   2.176e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 13.0400        (-5.80858      5.67838)
R1^2/D10^2  : 0.696162        (-0.43268      0.843209)
kT2 [keV]   : 59.6711        (-52.4454      -59.6729)
R2^2/D10^2  : 8.26364E-03    (-0.00768795   0.0954672)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.99 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     55 degrees of freedom 
# Null hypothesis probability =   2.408516e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.789e-08   1.610e-08
25- 50  1.077e-07   6.115e-08
50-150  3.925e-07   1.969e-07
15-150  5.280e-07   2.527e-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: 1.32607     ( -0.0875823   0.0873017 )
Norm@50keV  : 1.94311E-02    ( -0.000939982   0.000939932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.84 using 59 PHA bins.
# Reduced chi-squared =         0.9797 for     57 degrees of freedom 
# Null hypothesis probability =   5.186218e-01
 
Photon flux (15-150 keV)    in 37.01 sec: 2.32969 ( -0.120286  0.1207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.06232e-06 ( -3.67056e-07  3.68258e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23661     ( -0.350656   0.0959444 )
Epeak [keV] : 438.626      ( -621.615 -772.573 )
Norm@50keV  : 2.13637E-02    ( -0.00186147   0.00868243 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.91 using 59 PHA bins.
# Reduced chi-squared =         0.9985 for     56 degrees of freedom 
# Null hypothesis probability =   4.781279e-01
 
Photon flux (15-150 keV)    in 37.01 sec: 2.32269 ( -0.1248  0.12496 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.04589e-06 ( -3.85607e-07  1.92304e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.871497   ( 0.877106   0.877106 )
beta        : -1.38278    ( 1.38262   0.132176 )
Epeak [keV] : 96.6698      ( -98.5102 495.314 )
Norm@50keV   : 3.54635E-02    ( -0.0159531   2.38193 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     55 degrees of freedom 
# Null hypothesis probability =   4.687764e-01
 
Photon flux (15-150 keV)    in 37.01 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)  = 1.59e-06
S(50-100 keV) = 2.54e-06

T90 vs. Hardness ratio plot

T90                                   = 28.3199999928474 sec.
Hardness ratio (energy fluence ratio) = 1.59748

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.65983
Count Ratio (50-100 keV) / (15-25 keV) = 1.50783

Mask shadow pattern

IMX = 6.979517698096455E-01, IMY = -7.266237093925275E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-239.248000 -14.256000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
158.1936  44.4091    4.2  46.5   10.0   0.9803   2.8 ------	UNKNOWN                       
 24.1922  23.8122    3.0  54.3  177.0   2.6067   3.8 ------	UNKNOWN                       
179.8395  49.5272    2.7  49.6  -10.6   1.5505   4.2 ------	UNKNOWN                       
353.1461  68.7216    2.2  28.8 -115.4   1.1970   5.3 ------	UNKNOWN                       
201.1524  56.8802    2.5  48.9  -29.9   1.8208   4.6 ------	UNKNOWN

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

Time interval of the image:
-14.256000 22.752000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
128.2473  33.1078    0.6  45.2   46.2  10.7396  18.5 ------	UNKNOWN                       
163.7785  37.0060    3.5  55.0    9.9   2.0457   3.3 ------	UNKNOWN                       
  5.8930  35.0414    2.4  50.8 -158.8   0.7782   4.8 ------	UNKNOWN                       
274.8408  70.3363    2.1  41.5  -75.8   1.3632   5.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
375.352620 962.783300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 72.3160  36.8611    2.3  45.4  129.5   6.9552   5.0 ------	UNKNOWN                       
142.9070 -18.8049    3.1  53.7    0.9   4.4450   3.7 ------	UNKNOWN                       
186.2254  57.6262    2.6  45.7 -122.4   7.3549   4.5 ------	UNKNOWN

Plot creation:
Sun May 31 05:07:12 EDT 2015