J/AJ/150/136 Speckle interferometry at USNO. XX. (Hartkopf+, 2015)
Speckle interferometry at the U.S. Naval observatory. XX.
Hartkopf W.I., Mason B.D.
<Astron. J., 150, 136 (2015)>
=2015AJ....150..136H 2015AJ....150..136H (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Interferometry
Keywords: binaries: general - binaries: visual
Abstract:
Results are presented of 4222 intensified CCD observations of double
stars, made with the 26 inch refractor of the U.S. Naval Observatory
in 2013 and 2014. These observations are averaged into 2335 mean
relative positions and range in separation from 0.53'' to 83.90'', with
a median separation of 11.42''. This is the 20th in this series of
papers and covers the period 2013 January 4 through 2014 December 18.
Also presented are 13 pairs which are measured for the first time, 12
pairs which appear to be lost, linear elements for 17 pairs, and
orbital elements for five additional pairs. Finally, we investigated
apparent systematic residuals to earlier measures in this series, and
modify scale factors for closer pairs observed between 1990 and the
present.
Description:
This is the 20th in a series of papers from the U.S. Naval
Observatory's speckle interferometry program, presenting results of
observations obtained at the USNO 26inch telescope in Washington, DC.
From 2013 January 4 through 2014 December 18, the 26inch telescope was
used on 135 of 451 scheduled nights.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 64 13 New pairs
table2.dat 84 2347 Relative astrometry of double stars
table3.dat 122 5 New orbital elements
table4.dat 141 17 New rectilinear elements
refs.dat 215 64 References
notes.dat 572 5 Notes
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
J/AJ/147/123 : Speckle interferometry at SOAR in 2012-2013 (Tokovinin+, 2014)
J/AJ/142/56 : Speckle interferometry at the USNO station (Hartkopf+, 2011)
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/108/2299 : ICCD speckle observations of binary stars. XI. (Hartkopf+ 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Hour of Right Ascension of primary (J2000) (1)
4- 5 I2 min RAm Minute of Right Ascension of primary (J2000) (1)
7- 11 F5.2 s RAs Second of Right Ascension of primary (J2000) (1)
13 A1 --- DE- Sign of the Declination of primary (J2000) (1)
14- 15 I2 deg DEd Degree of Declination of primary (J2000) (1)
17- 18 I2 arcmin DEm Arcminute of Declination of primary (J2000) (1)
20- 23 F4.1 arcsec DEs Arcsecond of Declination of primary (J2000) (1)
25- 34 A10 --- WDS WDS name (HHMMMm+DDMM; J2000) (2)
36- 42 A7 --- Disc Discoverer designation (3)
44- 48 A5 --- Comp Component
50- 54 F5.2 mag mag1 [10.4/12.9] Visual magnitude of the primary (1)
56- 60 F5.2 mag mag2 [10.8/14.1] Visual magnitude of the secondary (1)
62- 64 A3 --- n_Disc Circumstance of the discovery (1, 2, or 3) (4)
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Note (1): Coordinate and magnitude information from CDS. Magnitude information
is from one of the catalogs queried in the Aladin sky atlas, operated at
CDS, Strasbourg, France.
Note (2): Based on the epoch-2000 coordinates of the system primary.
Note (3): WSI=Washington Stellar Interferometer.
Note (4): The codes for the notes are defined as follows:
1 = Physicality status unknown, but closer than the published pair;
2 = Magnitudes are red, not visual;
3 = Measure originally assigned to WDS 23340+0334 = BAL2581 in Mason et al.
2002 (cat. J/AJ/124/2254), but does not match that pair closely enough.
The measure has been reassigned to this new pair.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS name (HHMMm+DDMM; J2000)
12- 19 A8 --- Disc Discover designation
21- 25 A5 --- Comp Component
29- 36 F8.3 yr Epoch [2007/2015]? Besselian year of observation
38- 42 F5.1 deg PA [0/360]? Mean position angle θ (1)
43 A1 --- u_PA [:] Uncertainty flag for PA
45- 49 F5.2 arcsec Sep [0.53/83.9]? Mean separation ρ
50 A1 --- u_Sep [:] Uncertainty flag for Sep
52- 53 I2 --- o_Sep [1/21]? Number of independent observations of
system
55- 59 F5.1 deg (O-C)P [-12.2/65.1]? The (O-C) position angle residual
(O-C)θ
61- 65 F5.2 arcsec (O-C)S [-3.1/1.9]? The (O-C) separation residual
(O-C)ρ
67- 74 A8 --- Ref Published orbit or linear solution reference
76 A1 --- New [N] New pair (see Table1)
78- 80 A3 --- Note Comments about the observation (2)
82- 84 I3 yr Ny [53/121]? Length of time since the system were
last measured (3)
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Note (1): The position angle, measured from north through east, has not been
corrected for precession, and is thus based on the equinox for the epoch of
observation.
Note (2): The codes for the notes are defined as follows:
C = Confirming observation;
G = First seen in the eyepiece of the Palomar 200in in Grf2012b (Section 4.49).
The new measure is closer than that rough estimate, although the period
is still probably well over 100y;
I = The measure was assigned to this pair as it was the only likely double
in the field, but the identification is uncertain;
O = The older measure was significantly different from historical measure(s).
The large change in position has been confirmed by other recent
observations, either by us or in other publications;
R = "Rapid-moving" pairs; defined as pairs having orbital periods under 100y;
V = This is the vector addition of measures of other pairs in this multiple
system.
Note (3): Since priority is given to both unconfirmed systems and to systems not
observed recently, the time since last observation can be surprisingly
large.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS name (HHMMm+DDMM; J2000)
12- 19 A8 --- Disc Discover designation
21- 22 A2 --- Comp [AB] Component
24- 30 F7.3 yr Per [48.7/743.8] Period
32- 38 F7.3 yr e_Per [-0.09/114.2] Formal error in Per
40- 45 F6.4 arcsec a [0.7/1.9] The semimajor axis
47- 52 F6.4 arcsec e_a [0.003/0.18] Formal error in a
54- 59 F6.2 deg i [76.1/140.4] The inclination
61- 64 F4.2 deg e_i [0.2/6.2] Formal error in i
66- 71 F6.2 deg Omega [60.3/287] The longitude of the node Ω
73- 77 F5.2 deg e_Omega [0.17/13.2] Formal error in Omega
79- 86 F8.3 yr T0 [1897.2/1968.5] The epoch of the most recent
periastron passage (T0 in Besselian years)
88- 93 F6.3 yr e_T0 [0.1/14.3] Formal error in T0
95-100 F6.4 --- e [0.2/0.91] The eccentricity
102-107 F6.4 --- e_e [0.003/0.05] Formal error in eccentricity
109-114 F6.2 deg omega [42.2/355.8] The longitude of periastron
116-120 F5.2 deg e_omega [0.6/18.5] Formal error in omega
122 I1 --- Gr [2/4] Grade for each orbit (2, 3, or 4) (1)
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Note (1): See Hartkopf et al. (2001AJ....122.3472H 2001AJ....122.3472H) for the description of the
orbit grading criteria (1=definitive to 5=indeterminate).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS name (HHMMm+DDMM; J2000)
12- 19 A8 --- Disc Discover designation
21- 22 A2 --- Comp Component
24- 33 F10.6 arcsec x0 Zero point in x (x0) (1)
35- 42 F8.6 arcsec e_x0 Error in x0
44- 52 F9.6 arcsec/yr ax Slope in x (ax) (1)
54- 61 F8.6 arcsec/yr e_ax Error in ax
63- 72 F10.6 arcsec y0 Zero point in y (y0) (1)
74- 81 F8.6 arcsec e_y0 Error in y0
83- 91 F9.6 arcsec/yr ay Slope in y (ay) (1)
93-100 F8.6 arcsec/yr e_ay Error in ay
102-109 F8.3 yr T0 [1699.4/2276.4] Time of closest apparent
separation T0 (1)
111-115 F5.3 yr e_T0 [0.003/0.4] Error in T0
117-122 F6.3 arcsec Sep0 [1.8/45.2] Closest apparent separation
ρ0 (1)
124-128 F5.3 arcsec e_Sep0 [0.03/3.4] Error in Sep0
130-135 F6.2 deg PA0 [36.4/329.7] Position angle θ0 (1)
137-141 F5.2 deg e_PA0 [0.45/31.25] Error in PA0
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Note (1): See Hartkopf & Mason (2011;
http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/lin1) for a
description of all terms.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Ref Reference identifier
10- 28 A19 --- BibCode Bibliographic code
30- 62 A33 --- Aut Author's name
64-215 A152 --- Com Comment
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS name (HHMMm+DDMM; J2000)
12-572 A561 --- Note Notes
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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 XVIII 2012AJ....143..124M 2012AJ....143..124M, Cat. J/AJ/143/124
Mason et al., Paper XIX 2013AJ....146...56M 2013AJ....146...56M, Cat. J/AJ/146/56
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) Prepared by [AAS]; Sylvain Guehenneux [CDS] 02-Feb-2016