J/AJ/143/124 Speckle interferometry at the USNO. XVIII. (Mason+, 2012)
Speckle interferometry at the U.S. Naval Observatory. XVIII.
Mason B.D., Hartkopf W.I., Friedman E.A.
<Astron. J., 143, 124 (2012)>
=2012AJ....143..124M 2012AJ....143..124M
ADC_Keywords: Stars, double and multiple ; Interferometry
Keywords: binaries: general - binaries: visual
Abstract:
The results of 2490 intensified CCD observations of double stars, made
with the 26 inch refractor of the U.S. Naval Observatory, are
presented. Each observation of a system represents a combination of
over 2000 short-exposure images. These observations are averaged into
1462 mean relative positions and range in separation from 0.56" to
71.80", with a mean separation of 14.81". This is the 18th in this
series of papers and covers the period 2011 January 3 through 2011
December 18. Also presented are four pairs which are resolved for the
first time, thirteen other pairs which appear to be lost, and linear
elements for four additional pairs.
Description:
This is the 18th in a series of papers from the U.S. Naval
Observatory's speckle interferometry program, presenting results of
observations obtained at the USNO 26 inch telescope in Washington, DC.
Table 2 presents the mean relative position of the members of 1462
systems having no published orbital or rectilinear elements (including
measures obtained in 2007-2008). Table 3 presents the mean relative
positions for 131 systems with published orbital determinations or
linear solutions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 60 1335 ICCD measurements of double stars
table3.dat 82 133 Measurements of systems with orbits or
rectilinear solutions
refs.dat 218 21 References
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2012)
J/AJ/143/10 : WIYN speckle observations of binaries. VII. (Horch+, 2012)
J/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)
J/AJ/142/56 : Speckle interferometry at the USNO station (Hartkopf+, 2011)
J/AJ/142/46 : Speckle interferometry at USNO. XVII. (Mason+, 2011)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/138/813 : Speckle interferometry at Mount Wilson Obs. (Hartkopf+, 2009)
J/AJ/135/1334 : Speckle interferometry at the USNO station (Hartkopf+, 2008)
J/AJ/132/2219 : Speckle interferometry at USNO. XII (Mason+, 2006)
J/AJ/127/539 : Speckle interferometry at USNO. IX. (Mason+, 2004)
J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)
J/A+A/385/87 : Speckle interferometry of multiple stars (Balega+, 2002)
J/A+A/367/865 : Speckle observations of binary systems (Prieur+ 2001)
J/AJ/121/3224 : Speckle interferometry of HIP binaries (Mason+, 2001)
J/AJ/119/3084 : ICCD speckle obs. of binary stars. XXIII. (Hartkopf+, 2000)
J/A+A/341/121 : Visual binary orbits and masses (Soederhjelm 1999)
J/PAZh/24/868 : The triple system ADS 9167 (Kiyaeva+, 1998)
J/A+AS/105/503 : Binary star speckle measurements (Balega+ 1994)
J/AJ/106/1639 : Speckle observations of binary stars (McAlister+ 1993)
Byte-by-byte Description of file: table[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS name (JHHMMm+DDMM)
12- 21 A10 --- Disc Discoverer designation
23- 27 A5 --- m_Disc Additional system components
29- 36 F8.3 yr Epoch ? Epoch of observation expressed as a
fractional Besselian year
38- 42 F5.1 deg PA ? Mean position angle θ (1)
43 A1 --- u_PA Uncertainty flag on PA
45- 49 F5.2 arcsec Sep ? Mean separation ρ
50 A1 --- u_Sep Uncertainty flag on Sep
52 I1 --- o_Sep ? Number of observations contained in the mean
54- 56 I3 yr Ny [51-115]? Number of years since last measure
(for table 2 only)
58- 63 A6 --- Note Notes (2)
65- 68 F4.1 deg (O-C)A ? O-C value for θ (for table 3 only)
70- 74 F5.2 arcsec (O-C)S ? O-C value for ρ (for table 3 only)
76- 82 A7 --- Ref Reference (table 3 only) (see refs.dat file)
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Note (1): The position angle has not been corrected for precession and is thus
based on the equinox for the epoch of observation.
Note (2): Note as follows:
a = These are small Δm system. The orbit indicates a quadrant flip is
needed; however, based on multiple high accuracy and precision
determinations of the magnitudes of the pairs, the position angle in
table 3 is correct. It appears the orbits need to have their quadrants
flipped instead. Residual determination assumes this.
A = While it doesn't match the discovery measure, it matches recent measures
well.
B = Typo or identification error in Espin (1908MNRAS..68..202E 1908MNRAS..68..202E) measure.
Both these match the discovery measure of Herschel (1831, MmRAS, 4, 331)
quite well.
C = Confirming observation
D = Large position change, but identification not in doubt.
E = Incomplete orbital elements in Hopmann (1960, MiWie, 10, 227).
F = First resolution of a new pair. See Table 1.
G = Wider pair listed by discoverer and not in earlier WDS editions. Discovery
designation added recently, so not in the discoverer's ordinal list.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Ref Reference number
6- 24 A19 --- BibCode BibCode
26- 46 A21 --- Aut Author's name
48-218 A171 --- Com Comments
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History:
From electronic version of the journal
References:
Douglass et al., Paper I 1997ApJS..111..289D 1997ApJS..111..289D
Germain et al., Paper II 1999AJ....117.1905G 1999AJ....117.1905G, Cat. J/AJ/117/1905
Germain et al., Paper III 1999AJ....117.2511G 1999AJ....117.2511G, Cat. J/AJ/117/2511
Douglass et al., Paper IV 1999AJ....118.1395D 1999AJ....118.1395D, Cat. J/AJ/118/1395
Douglass et al., Paper V 2000AJ....119.3071D 2000AJ....119.3071D, Cat. J/AJ/119/3071
Mason et al., Paper VI 2000AJ....120.1120M 2000AJ....120.1120M, Cat. J/AJ/120/1120
Mason et al., Paper VII 2001AJ....122.1586M 2001AJ....122.1586M, Cat. J/AJ/122/1586
Mason et al., Paper VIII 2002AJ....124.2254M 2002AJ....124.2254M, Cat. J/AJ/124/2254
Mason et al., Paper IX 2004AJ....127..539M 2004AJ....127..539M, Cat. J/AJ/127/539
Mason et al., Paper X 2004AJ....128.3012M 2004AJ....128.3012M, Cat. J/AJ/128/3012
Mason et al., Paper XI 2006AJ....131.2687M 2006AJ....131.2687M, Cat. J/AJ/131/2687
Mason et al., Paper XII 2006AJ....132.2219M 2006AJ....132.2219M, Cat. J/AJ/132/2219
Mason et al., Paper XIII 2007AJ....134.1671M 2007AJ....134.1671M, Cat. J/AJ/134/1671
Mason et al., Paper XIV 2008AJ....136.2223M 2008AJ....136.2223M, Cat. J/AJ/136/2223
Mason et al., Paper XV 2010AJ....140..480M 2010AJ....140..480M, Cat. J/AJ/140/480
Mason et al., Paper XVI 2011AJ....141..157M 2011AJ....141..157M, Cat. J/AJ/141/157
Mason et al., Paper XVII 2011AJ....142...46M 2011AJ....142...46M, Cat. J/AJ/142/46
Mason et al., Paper XIX 2013AJ....146...56M 2013AJ....146...56M, Cat. J/AJ/146/56
Hartkopf et al., Paper XX 2015AJ....150..136H 2015AJ....150..136H, Cat. J/AJ/150/136
Mason et al., Paper XXI 2017AJ....153...20M 2017AJ....153...20M, Cat. J/AJ/153/20
Mason et al., Paper XXII 2017AJ....154..183M 2017AJ....154..183M, Cat. J/AJ/154/183
Mason et al., Paper XXIII 2018AJ....156..240M 2018AJ....156..240M
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 18-Jun-2013