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J/AJ/141/157        Speckle interferometry at USNO. XVI.     (Mason+, 2011)
Speckle interferometry at the U.S. Naval Observatory. XVI.
    Mason B.D., Hartkopf W.I., Wycoff G.L.
   <Astron. J., 141, 157 (2011)>
   =2011AJ....141..157M
ADC_Keywords: Stars, double and multiple ; Interferometry

Keywords: binaries: general - binaries: visual - techniques: interferometric


Abstract:
    The results of 1031 speckle-interferometric observations of double
    stars, made with the 26 inch refractor of the U.S. Naval Observatory,
    are presented. Each speckle-interferometric observation of a system
    represents a combination of over two thousand short-exposure images.
    These observations are averaged into 457 mean relative positions and
    range in separation from 0.15" to 16.94", with a median separation of
    3.03". The range in V-band magnitudes for the primary (secondary) of
    observed targets is 3.1-12.9 (3.2-13.3).

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        58      320   Speckle-interferometric measurements of double stars
table3.dat       111      144   Speckle-interferometric measurements and residuals
                             to systems with orbits or linear elements


See also:
 J/AJ/117/1905 : Speckle interferometry at USNO. II   (Germain+, 1999)
 J/AJ/117/2511 : Speckle interferometry at USNO. III  (Germain+, 1999)
 J/AJ/118/1395 : Speckle interferometry at USNO. IV   (Douglass+, 1999)
 J/AJ/119/3071 : Speckle interferometry at USNO. V    (Douglass+, 2000)
 J/AJ/120/1120 : Speckle interferometry at USNO. VI   (Mason+, 2000)
 J/AJ/122/1586 : Speckle interferometry at USNO. VII  (Mason+, 2001)
 J/AJ/124/2254 : Speckle interferometry at USNO. VIII (Mason+, 2002)
 J/AJ/127/539  : Speckle interferometry at USNO. IX   (Mason+, 2004)
 J/AJ/128/3012 : Speckle interferometry at USNO. X    (Mason+, 2004)
 J/AJ/131/2687 : Speckle interferometry at USNO. XI   (Mason+, 2006)
 J/AJ/132/2219 : Speckle interferometry at USNO. XII  (Mason+, 2006)
 J/AJ/134/1671 : Speckle interferometry at USNO. XIII (Mason+, 2007)
 J/AJ/136/2223 : Speckle interferometry at USNO. XIV  (Mason+, 2008)
 J/AJ/140/480  : Speckle interferometry at USNO. XV.  (Mason+, 2010)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 10  A10   ---     WDS       WDS designation (HHMMm+DDMM, J2000)
  12- 19  A8    ---     Disc      Discoverer designation
  21- 24  A4    ---     Comp      Additional system components
  27- 34  F8.3  yr      Epoch     Epoch of observation
  36- 40  F5.1  deg     PA        Position angle θ
      41  A1    ---     u_PA      [:] Uncertainty flag for PA
  43- 47  F5.2  arcsec  Sep       Separation between components ρ
      48  A1    ---     u_Sep     [:] Uncertainty flag for Sep
      50  I1    ---     N         Number of observations contained in the mean
  52- 54  I3    ---     Nyr       ? Number of years since last measure
  56- 58  A3    ---     Note      [C1234] new or confirming observation (G1)


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1- 10  A10   ---     WDS       WDS Designation (HHMMs+DDMM, J2000)
  12- 19  A8    ---     Disc      Discoverer designation
  21- 24  A4    ---     Comp      Additional system components
  26- 33  F8.3  yr      Epoch     Epoch of observation
  35- 39  F5.1  deg     PA        Position angle θ
  41- 44  F4.2  arcsec  Sep       Separation between components ρ
      46  I1    ---     N         Number of observations contained in the mean
  48- 52  F5.1  deg     (O-C)PA   The O-C position angle residual
  54- 58  F5.2  arcsec  (O-C)Sep  The O-C separation residual
      59  A1    ---     L         [L] O-C relative to linear mouvement (1)
      60  A1    ---     Note      [C1234] new or confirming observation (G1)
  62-111  A50   ---     Ref       Observation reference

Note (1): L = O-C relative to the most recent determination in the "Catalog of
      Rectilinear Elements" (Hartkopf et al., 2006, Hartkopf et al., 2006,
      http://ad.usno.navy.mil/wds/lin1.html)


Global notes:

Note (G1): Notes as follows:
   C = confirming observation
   1 = earlier 2006 data not published (Mason et al., 2007, Cat. J/AJ/134/1671)
       due to larger than expected positional change
   2 = earlier 2004 data not published (Mason et al. 2006, Cat. J/AJ/131/2687)
       due to larger than expected positional change
   3 = this pair was "rediscovered" and had its position corrected from
       arcminute to arcsecond in the WDS.
   4 = earlier 2005 data not published (Mason et al., 2006, Cat. J/AJ/132/2219)
       due to larger than expected positional change


History:
    From electronic version of the journal

References:
    Douglass et al., Paper I     1997ApJS..111..289D
    Germain et al.,  Paper II    1999AJ....117.1905G, Cat. J/AJ/117/1905
    Germain et al.,  Paper III   1999AJ....117.2511G, Cat. J/AJ/117/2511
    Douglass et al., Paper IV    1999AJ....118.1395D, Cat. J/AJ/118/1395
    Douglass et al., Paper V     2000AJ....119.3071D, Cat. J/AJ/119/3071
    Mason et al.,    Paper VI    2000AJ....120.1120M, Cat. J/AJ/120/1120
    Mason et al.,    Paper VII   2001AJ....122.1586M, Cat. J/AJ/122/1586
    Mason et al.,    Paper VIII  2002AJ....124.2254M, Cat. J/AJ/124/2254
    Mason et al.,    Paper IX    2004AJ....127..539M, Cat. J/AJ/127/539
    Mason et al.,    Paper X     2004AJ....128.3012M, Cat. J/AJ/128/3012
    Mason et al.,    Paper XI    2006AJ....131.2687M, Cat. J/AJ/131/2687
    Mason et al.,    Paper XII   2006AJ....132.2219M, Cat. J/AJ/132/2219
    Mason et al.,    Paper XIII  2007AJ....134.1671M, Cat. J/AJ/134/1671
    Mason et al.,    Paper XIV   2008AJ....136.2223M, Cat. J/AJ/136/2223
    Mason et al.,    Paper XV    2010AJ....140..480M, Cat. J/AJ/140/480
(End)                                      Patricia Vannier [CDS]    04-Aug-2012