batgrbproduct analysis for trigger=666352

batgrbproduct Analysis for Trigger=666352

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): Sun Mar 13 22:13:53 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger666352
======================================================================

  Trigger: 00666352      Segment: 000

  BAT Trigger Time: 471023176.448   [s; MET]
      Trigger Stop: 471023179.52   [s; MET]
               UTC: 2015-12-05T15:46:00.936900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 229.282355559918   Dec: 35.7691507793621  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.07
     Image Trigger?:     NO
     Rate S/N Ratio:     16.431676725155  [ if not an image trigger ]
     Image S/N Ratio:    7.07

  Flight Position:   [ source = BAT ]
    RA: 229.282355559918   Dec: 35.7691507793621  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 229.288120119494   Dec: 35.7679078665579  [deg; J2000]  
        { 15h 17m 09.1s , +35d 46' 04.5" }
         +/- 1.36549240860416 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.434747976743145 [arcmin] (formal 1-sigma fit error)
    SNR: 19.4916213313303
 
  Angular difference between Flight and Ground position is 0.290376 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 64 +/- 35.7770876399966
        Measured from: -11.4480000138283
                   to: 52.5519999861717     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 4.55199998617172
                   to: 20.5519999861717     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 12.0519999861717     
                   to: 13.0519999861717     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.4480000138283     
                   to: 68.5519999861717     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.426066   0.680239   0.781129   0.135129
           0.052425   0.055016   0.048979   0.042673 [error]
 Peak      0.006966   0.013258   0.020134   0.007353
           0.006080   0.006248   0.005697   0.004937 [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 1.21e-07 2.84e-07 5.32e-07 2.41e-06 1.44e-06 3.34e-06   erg/cm2
              Error 1.82e-08 2.54e-08 4.61e-08 4.78e-07 1.20e-07 5.03e-07   erg/cm2
Peak flux Power-law 6.53e-02 1.05e-01 1.28e-01 3.07e-01 3.87e-01 6.06e-01   ph/cm2/s
              Error 5.38e-02 5.28e-02 4.22e-02 2.51e-01 1.35e-01 2.45e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.02e-07 2.94e-07 5.66e-07 1.14e-06 1.39e-06 2.10e-06   erg/cm2
              Error 2.34e-08 2.85e-08 5.57e-08 7.56e-07 1.27e-07 7.55e-07   erg/cm2
Peak flux Cutoff-PL 6.38e-02 1.05e-01 1.29e-01 2.94e-01 3.86e-01 5.98e-01   ph/cm2/s
              Error 6.38e-02 7.99e-02 5.20e-02 2.65e-01 1.39e-01 2.91e-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    1.095    0.133    -      -           1.72e-03 1.30e-04   52.780 57
CPL   0.468    0.589     139.9  239.4      3.26e-03 2.04e-03   48.850 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.715    0.678    -      -           3.35e-03 1.27e-03   39.170 57
CPL   3.096    1.477     282.0    0.0      7.81e-05 0.00e+00   38.750 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: 29.120000 sec.
T50 in the 50-300 keV band: 13.824000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   80.000  -11.448   68.552
T90    64.000  -11.448   52.552
T50    16.000    4.552   20.552
Peak    1.000   12.052   13.052

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  229.2881    35.7679   0.0098    14.6841   143.3463         1.7741094     19.492 TRIG_00666352                 
 
Foreground time interval of the image:
-11.448  40.453 (delta_t =  51.901 [sec])
Background time interval of the image:
-255.747 -11.448 (delta_t = 244.299 [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 3.072000

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 3.072000

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 3.072000

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  -11.448 sec. to   68.552 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09545     ( -0.134444   0.132462 )
Norm@50keV  : 1.72212E-03    ( -0.000130023   0.000129849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.78 using 59 PHA bins.
# Reduced chi-squared =         0.9260 for     57 degrees of freedom 
# Null hypothesis probability =   6.338931e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.199667 ( -0.015495  0.015526 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44268e-06 ( -1.19162e-07  1.19928e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -11.448 sec. to   68.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.468097     ( -0.63255   0.544967 )
Epeak [keV] : 139.902      ( -42.8143 436.083 )
Norm@50keV  : 3.26087E-03    ( -0.0013611   0.00272283 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.85 using 59 PHA bins.
# Reduced chi-squared =         0.8723 for     56 degrees of freedom 
# Null hypothesis probability =   7.399854e-01
 
Photon flux (15-150 keV)    in 80 sec: 0.193450 ( -0.016514  0.016428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39557e-06 ( -1.2739e-07  1.27538e-07 ) ergs/cm2

Band function

Time interval is from  -11.448 sec. to   68.552 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.468438   ( -0.355244   0.589086 )
beta        : -10.0000    ( 10   7.10543e-15 )
Epeak [keV] : 139.979      ( -42.8908 438.831 )
Norm@50keV   : 3.25898E-03    ( -0.00135955   0.00272461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.85 using 59 PHA bins.
# Reduced chi-squared =         0.8881 for     55 degrees of freedom 
# Null hypothesis probability =   7.074177e-01
 
Photon flux (15-150 keV)    in 80 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]    : 21.2463  (-1.9478  2.22373)
R^2/D10^2   : 7.83345E-03  (-0.00213485   0.0028489)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.33 using 59 PHA bins.
# Reduced chi-squared =          1.146 for     57 degrees of freedom 
# Null hypothesis probability =   2.097996e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.318e-08   8.664e-09
25- 50  2.753e-07   3.092e-08
50-150  9.271e-07   1.178e-07
15-150  1.256e-06   1.180e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-14.1993      -200)
Norm        : 0.823625       (-0.0638783     0.0638783)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.98 using 59 PHA bins.
# Reduced chi-squared =          1.456 for     57 degrees of freedom 
# Null hypothesis probability =   1.392634e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.641e-07   1.416e-08
25- 50  3.157e-07   4.276e-08
50-150  6.924e-07   2.782e-07
15-150  1.172e-06   3.062e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.22598        (-1.66902      2.23327)
R1^2/D10^2  : 0.350208        (-0.259625      1.55367)
kT2 [keV]   : 25.3498        (-3.10982      4.37821)
R2^2/D10^2  : 4.13697E-03    (-0.00171285   0.00227851)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.74 using 59 PHA bins.
# Reduced chi-squared =         0.7953 for     55 degrees of freedom 
# Null hypothesis probability =   8.626210e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.177e-07   5.285e-08
25- 50  2.685e-07   6.616e-08
50-150  9.993e-07   1.865e-07
15-150  1.385e-06   2.232e-07

Peak spectrum fit

Power-law model

Time interval is from   12.052 sec. to   13.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.714650     ( -0.744333   0.610903 )
Norm@50keV  : 3.34992E-03    ( -0.00132311   0.0012088 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.17 using 59 PHA bins.
# Reduced chi-squared =         0.6873 for     57 degrees of freedom 
# Null hypothesis probability =   9.656332e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.386786 ( -0.134003  0.136474 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.06266e-08 ( -1.37917e-08  1.39015e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   12.052 sec. to   13.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.09560     ( -6.0502   -3.09696 )
Epeak [keV] : 282.035      (   )
Norm@50keV  : 7.80942E-05    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.75 using 59 PHA bins.
# Reduced chi-squared =         0.6919 for     56 degrees of freedom 
# Null hypothesis probability =   9.617695e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.385887 ( -0.141064  0.137277 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.06415e-08 ( -1.45331e-08  1.38276e-08 ) ergs/cm2

Band function

Time interval is from   12.052 sec. to   13.052 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.852800   ( 0.85283   0.85283 )
beta        : -0.714650    ( -0.611593   0.744435 )
Epeak [keV] : 14.1332      ( -14.1331 -14.1331 )
Norm@50keV   : 4.99106E-03    ( -0.00282473   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.17 using 59 PHA bins.
# Reduced chi-squared =         0.7123 for     55 degrees of freedom 
# Null hypothesis probability =   9.472694e-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]    : 29.0210  (-10.9639  32.4439)
R^2/D10^2   : 6.42658E-03  (-0.00642362   0.0204782)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.15 using 59 PHA bins.
# Reduced chi-squared =         0.7043 for     57 degrees of freedom 
# Null hypothesis probability =   9.557908e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.641e-10   5.600e-10
25- 50  5.256e-09   3.191e-09
50-150  3.166e-08   2.052e-08
15-150  3.777e-08   2.384e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-96.0813      -200)
Norm        : 1.56482       (-0.568253     0.568253)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.31 using 59 PHA bins.
# Reduced chi-squared =         0.7774 for     57 degrees of freedom 
# Null hypothesis probability =   8.899304e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.896e-09   2.385e-09
25- 50  7.494e-09   4.761e-09
50-150  1.644e-08   1.058e-08
15-150  2.783e-08   1.763e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.13594        (-2.13772      -2.13772)
R1^2/D10^2  : 85.6268        (-85.1645      -85.1645)
kT2 [keV]   : 31.1665        (-12.1428      48.5961)
R2^2/D10^2  : 5.14864E-03    (-0.00514507   0.0137547)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.94 using 59 PHA bins.
# Reduced chi-squared =         0.7081 for     55 degrees of freedom 
# Null hypothesis probability =   9.501745e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.145e-09   8.500e-10
25- 50  4.837e-09   2.933e-09
50-150  3.232e-08   1.977e-08
15-150  3.930e-08   2.279e-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: 0.864502     ( -0.132544   0.128736 )
Norm@50keV  : 2.25644E-03    ( -0.000169278   0.000168018 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.47 using 59 PHA bins.
# Reduced chi-squared =         0.8327 for     57 degrees of freedom 
# Null hypothesis probability =   8.118791e-01
 
Photon flux (15-150 keV)    in 51.9 sec: 0.258982 ( -0.0192424  0.0192972 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3328e-06 ( -1.01155e-07  1.01504e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.366576     ( -0.607495   0.532741 )
Epeak [keV] : 202.046      ( -77.1608 -202.046 )
Norm@50keV  : 3.60528E-03    ( -0.00137138   0.00255559 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.82 using 59 PHA bins.
# Reduced chi-squared =         0.8003 for     56 degrees of freedom 
# Null hypothesis probability =   8.582404e-01
 
Photon flux (15-150 keV)    in 51.9 sec: 0.252804 ( -0.02039  0.020329 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30792e-06 ( -1.06649e-07  1.06068e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5   -5 )
beta        : -0.877878    ( -0.133031   0.136211 )
Epeak [keV] : 23.4345      ( -23.034 9.80374 )
Norm@50keV   : 194.589    ( -13.7402   303377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.18 using 59 PHA bins.
# Reduced chi-squared =         0.8579 for     55 degrees of freedom 
# Null hypothesis probability =   7.640469e-01
 
Photon flux (15-150 keV)    in 51.9 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)  = 2.84e-07
S(50-100 keV) = 5.32e-07

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 1.87324

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.59656
Count Ratio (50-100 keV) / (15-25 keV) = 1.83335

Mask shadow pattern

IMX = -2.102307519081593E-01, IMY = -1.564370588792474E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 3.072000

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:
-255.747400 -11.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6883  35.2843    0.0  29.5 -175.7   0.2593   1.0   11.8	Her X-1                       
204.9932  60.1907    3.0  41.0  113.6   3.8651   3.8 ------	UNKNOWN                       
289.3265  25.6157    5.1  58.8 -159.2   3.7848   2.3 ------	UNKNOWN                       
286.8535  19.9517    3.4  57.8 -152.2   5.0491   3.4 ------	UNKNOWN                       
277.8497  11.6888    2.9  51.7 -139.5   4.8757   4.1 ------	UNKNOWN

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

Time interval of the image:
-11.448000 40.452600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5535  35.2394    8.4  29.4 -175.6  -0.1490  -1.4    7.8	Her X-1                       
229.2881  35.7679    0.6  14.7  143.3   1.7741  19.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
80.052600 962.601300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3011  35.3060    9.3  20.3 -162.2   2.4224   1.2    8.0	Her X-1                       
299.5613  35.1528    2.2  55.9 -177.8  43.1709   5.3    3.3	Cyg X-1                       
181.5847  43.1739    3.9  37.0   50.3   9.0674   2.9 ------	UNKNOWN                       
203.5413  57.5365    2.2  27.7   83.7  12.8843   5.2 ------	UNKNOWN                       
251.4706  39.8924    3.1  18.0 -176.1   6.3262   3.8 ------	UNKNOWN

Plot creation:
Fri Mar 18 13:51:51 EDT 2016