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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 (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:
FileName Lrecl Records Explanations
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
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
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) also available at http://ad.usno.navy.mil/wds/orb6/wdsref.html); in refs.dat file
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.
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)
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.
Byte-by-byte Description of file: table4.dat
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
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.
Byte-by-byte Description of file: refs.dat
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
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 10 A10 --- WDS WDS identification (from cat. B/wds) 12-1213 A1202 --- Note Notes
History: From electronic version of the journal
(End) Prepared by [AAS]; Sylvain Guehenneux [CDS] 26-Jan-2018
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