J/AJ/151/153 Speckle interferometry at SOAR in 2015 (Tokovinin+, 2016)
Speckle interferometry at SOAR in 2015.
Tokovinin A., Mason B.D., Hartkopf W.I., Mendez R.A., Horch E.P.
<Astron. J., 151, 153-153 (2016)>
=2016AJ....151..153T 2016AJ....151..153T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Interferometry
Keywords: binaries: general
Abstract:
The results of speckle interferometric observations at the Southern
Astrophysical Research Telescope in 2015 are provided, totaling 1303
measurements of 924 resolved binary and multiple stars, and
non-resolutions of 260 targets. The separations range from 12mas to
3.37'' (median 0.17''); the maximum measured magnitude difference is
6.7mag. We resolved 27 pairs for the first time, including 10 as inner
or outer subsystems in previously known binaries, e.g., the 50mas pair
in ε Cha. Newly resolved pairs are commented upon. We discuss
three apparently non-hierarchical systems that have been discovered in
this series, arguing that their unusual configurations are the result
of projection. The resolved quadruple system HIP71510 is also studied.
Description:
The observations reported here were obtained with the high-resolution
camera (HRCam)-a fast imager designed to work at the 4.1m SOAR
telescope. For practical reasons, the camera was mounted on the SOAR
Adaptive Module (SAM). We mostly used the Stromgren y filter
(543/22nm) and the near-infrared I filter (788/132nm).
The observing time for this program was allocated through NOAO (three
nights, programs 15A-0097 and 15B-0009, PI A.T.) and by the Chilean
National Time Allocation Committee (three nights in 2015B, program
CN2015B-6, PI R.A.M.). All observations were made by A.T.
Table2 lists 1303 measures of 924 resolved binary stars and
subsystems, including 27 newly resolved pairs.
Table3 contains the data on 360 unresolved stars, some of which are
listed as binaries in the WDS or resolved here in other filters.
Table4 lists 27 newly resolved pairs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 111 1303 Measurements of double stars at SOAR
table3.dat 82 360 Unresolved stars
table4.dat 89 27 Newly resolved pairs
refs.dat 158 132 References
notes.dat 1213 26 Notes
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
V/130 : GC survey of Solar neighbourhood III (Holmberg+, 2009)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
J/ApJ/799/4 : Robo-AO observations of binary stars (Riddle+, 2015)
J/AJ/150/151 : DSSI observations of binaries. VI. (Horch+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/149/195 : Spectroscopy of HD 91962 (Tokovinin+, 2015)
J/AJ/149/8 : RVs of southern visual multiple stars (Tokovinin+, 2015)
J/AJ/147/123 : SOAR speckle interferometry in 2012-2013 (Tokovinin+, 2014)
J/AJ/144/56 : Speckle interferometry at SOAR in 2012 (Tokovinin+, 2012)
J/AJ/144/7 : NIR imaging of HIP astrometric binaries (Tokovinin+, 2012)
J/AJ/143/42 : SOAR speckle interferometry in 2010-2011 (Hartkopf+, 2012)
J/ApJ/757/29 : Astrometric measurements of HD 143275 (Che+, 2012)
J/MNRAS/422/2765 : Orbital motion monitoring of A multiples (De Rosa+ 2012)
J/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)
J/AJ/140/1623 : PHASES diff. astrometry data archive (Muterspaugh+, 2010)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/137/3358 : Speckle interferometry of massive stars (Mason+, 2009)
J/AJ/136/312 : 2001-2006 WIYN binary stars speckle obs. (Horch+, 2008)
J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)
J/MNRAS/331/45 : New periodic variables (Koen+, 2002)
J/A+A/341/121 : Visual binary orbits and masses (Soederhjelm 1999)
J/ApJS/117/587 : Observations of double stars. XVIII. (Heintz 1998)
J/A+AS/126/21 : Velocities and duplicity of F-type dwarfs (Nordstroem+ 1997)
J/AJ/111/370 : Orbits of 37 close visual systems (Hartkopf+ 1996)
J/ApJS/99/693 : Observations of double stars. XVI. (Heintz 1995)
J/AJ/108/2338 : Photographic astrometry. VIII. (Heintz 1994)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS identification (from cat. B/wds)
12- 20 A9 --- Disc Discoverer designation (as adopted in the WDS)
21- 25 A5 --- Comp Components
27- 29 A3 --- --- [HIP]
31- 36 I6 --- HIP ? Hipparcos number (cat. I/239)
37 A1 --- m_HIP [BC] Multiplicity index on HIP
39- 48 A10 --- OName Other name
50- 56 F7.4 yr Epoch [15.1/15.92] Besselian epoch of observation
58 A1 --- Flt [HIVy] Filter used: V, H, I=near-infrared I
filter (788/132nm), or y=Stromgren y filter
(543/22nm)
60 I1 --- No [1/6] Number of observations used
62- 66 F5.1 deg PA Position angle θ
68- 71 F4.1 mas Err [0/28] Internal measurement error in
tangential direction ρσθ
73- 78 F6.4 arcsec Sep [0.012/3.37] Separation ρ
80- 83 F4.1 mas e_Sep [0/40] The 1σ uncertainty in Sep
σρ
85- 87 F3.1 mag Dmag [0/6.8] Magnitude difference of pair Δm
89 A1 --- f_Dmag [*:q] Flag on Dmag (1)
91- 95 F5.1 deg (O-C)t [-75.5/265.2]? The (O-C) in PA [O-C]θ
97-102 F6.3 arcsec (O-C)r [-1.1/0.32]? The (O-C) in Sep [O-C]ρ
104-111 A8 --- Ref Reference code to the orbit adopted in the
Sixth Catalog of Orbits of Visual Binary Stars
(Hartkopf et al. 2001AJ....122.3472H 2001AJ....122.3472H) also
available at
http://ad.usno.navy.mil/wds/orb6/wdsref.html);
in refs.dat file
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Note (1): The flags are defined as follows:
* = Dmag and the true quadrant are determined from the resolved
long-exposure image;
: = Data are noisy and Δm is likely over-estimated (see Tokovinin et
al. 2010, Cat. J/AJ/139/743);
q = True quadrant is established from the shift-and-add (SAA or "lucky")
image.
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS identification (from cat. B/wds) (1)
12- 21 A10 --- Disc Discoverer designation (or other name for
objects without discoverer designations)
23- 27 A5 --- Comp Components
29- 31 A3 --- --- [HIP]
33- 38 I6 --- HIP [93/118319]? Hipparcos number (cat. I/239)
39 A1 --- m_HIP [BC] Multiplicity index on HIP
41- 50 A10 --- OName Other name (mostly HD identifier)
52- 58 F7.4 yr Epoch [15.1/15.92] Epoch of observation
60 A1 --- Flt [IVy] Filter used (V, I=near-infrared I filter
(788/132nm), or y=Stromgren y filter
(543/22nm)
62 I1 --- No [1/4] Number of observations used
64- 68 F5.3 arcsec MSep [0.02/0.06] Mininimum resolvable separation
ρmin (2)
70- 74 F5.2 mag Dm0.15 [1.9/5.7] The 5σ magnitude difference
Δm at 0.15'' (3)
76- 80 F5.2 mag Dm1 [2/7.6] The 5σ magnitude difference
Δm at 1'' (3)
82 A1 --- u_Dm1 [:] Flag for noisy data that are mostly
associated with faint stars (4)
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Note (1): For stars that do not have entries in the WDS, fictitious WDS-style
codes based on the J2000 position are listed.
Note (2): The estimated resolution limit equal to the diffraction radius
λ/D.
Note (3): The 5σ detection limit Δm5 at 0.15'' and 1'' separations
determined by the procedure described in Tokovinin et al. 2010
(Cat. J/AJ/139/743). When two or more data cubes are processed, the largest
Δm value is listed.
Note (4): In such cases, the quoted Δm might be too large (optimistic);
however, the knowledge that these stars were observed and no companions
were found is still useful for statistics.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS identification (from cat. B/wds)
12- 19 A8 --- Disc Discoverer designation (1)
21- 25 A5 --- Comp Components
27- 29 A3 --- --- [HIP]
31- 36 I6 --- HIP ? Hipparcos number (cat. I/239)
37 A1 --- m_HIP [B] Multiplicity index on HIP
39- 49 A11 --- OName Other name
51- 57 F7.4 --- Epoch [15.16/15.92] Epoch of observation
59 A1 --- Flt [Iy] Filter used: I=near-infrared I filter
(788/132nm), or y=Stromgren y filter (543/22nm)
61- 65 F5.1 deg PA [2.4/322.6] Position angle θ
67- 72 F6.4 arcsec Sep [0.021/1.78] Separation ρ
74- 78 A5 mag Dmag Magnitude difference of pair Δm
80- 84 A5 --- SpT Spectral type (2)
86- 89 F4.1 mas plx [3.5/29]? Hipparcos parallax (van Leeuwen, 2007,
Cat. I/311) πHIP2
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Note (1): For some multiple systems, we used existing discover codes and simply
added new component designations.
Note (2): As given in SIMBAD or estimated from absolute magnitude.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Ref Reference code
10- 28 A19 --- BibCode Bibliographic code
30-109 A80 --- Aut Author's name
111-158 A48 --- Com Comments
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS identification (from cat. B/wds)
12-1213 A1202 --- Note Notes
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History:
From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 26-Jan-2018