J/AJ/168/28 Speckle interferometry at SOAR telescope in 2023 (Tokovinin+, 2024)
Speckle interferometry at SOAR telescope in 2023.
Tokovinin A., Mason B.D., Mendez R.A., Costa E.
<Astron. J., 168, 28 (2024)>
=2024AJ....168...28T 2024AJ....168...28T
ADC_Keywords: Interferometry; Stars, double and multiple; Infrared; Optical
Keywords: Binary stars ; Interferometric binary stars ; Multiple stars
Abstract:
Results of the speckle-interferometry observations at the 4.1m
Southern Astrophysical Research Telescope obtained during 2023 are
presented: 1913 measurements of 1533 resolved pairs or subsystems
(median separation 0.16") and nonresolutions of 552 targets; 42 pairs
are resolved here for the first time. This work continues our
long-term effort to monitor orbital motion in close binaries and
hierarchical systems. A large number (147) of orbits have been
determined for the first time or updated using these measurements.
Complementarity of this program with the Gaia mission is highlighted.
Description:
The observations reported here were obtained with the HRCam --a fast
imager designed to work at the 4.1m Southern Astrophysical Research
(SOAR) telescope. We used mostly the near-infrared I filter
(824/170nm), while the Stromgren y filter (543/22nm) was used for
brighter and/or closer pairs.
The instrument and observing procedure are described in the previous
papers of these series (e.g., Tokovinin+ 2020, J/AJ/160/7) and briefly
summarized by Mason+ (2023, J/AJ/166/139).
The total number of HRCam observations made since 2008 approaches
40000 (26331 measurements and 12965 nonresolutions).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 134 1913 Measurements of double stars at the 4.1m Southern
Astrophysical Research Telescope (SOAR)
table2.dat 90 689 Unresolved stars
refs.dat 111 129 References
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/142/39 : Sample of 114 γ Doradus candidates (Henry+, 2011)
J/AJ/143/42 : Speckle interferometry at SOAR in 2010-11 (Hartkopf+, 2012)
J/AJ/144/56 : Speckle interferometry at SOAR in 2012 (Tokovinin+, 2012)
J/AJ/147/123 : Speckle interferometry at SOAR in 2012-13 (Tokovinin+, 2014)
J/AJ/150/151 : DSSI obs. of binaries. VI. Measures in 2014 (Horch+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/149/8 : RVel of southern visual multiple stars (Tokovinin+, 2015)
J/AJ/151/153 : Speckle interferometry at SOAR in 2015 (Tokovinin+, 2016)
J/AJ/152/46 : Sp. orbits for 15 late-type stars (Willmarth+, 2016)
J/AJ/153/212 : Obs. of binary stars at the WIYN telescope (Horch+, 2017)
J/ApJS/235/6 : Updated Mult. Star Catalog (MSC): Dec 2023 (Tokovinin, 2018)
J/AJ/155/235 : Speckle interferometry at SOAR in 2016-17 (Tokovinin+, 2018)
J/AJ/157/56 : DSSI obs. of binary & trinary star systems (Horch+, 2019)
J/ApJ/871/63 : How to constrain your M dwarf. II. Nearby bin. (Mann+, 2019)
J/AJ/158/222 : Orbits of subsystems in mult. stars. VI. (Tokovinin, 2019)
J/AJ/158/48 : Speckle interferometry at SOAR in 2018 (Tokovinin+, 2019)
J/MNRAS/496/1355 : Accurate SB2 radial velocities (Halbwachs+, 2020)
J/AJ/160/251 : RVels & orbital data, 5 triple stars (Tokovinin+, 2020)
J/AJ/160/7 : Speckle interferometry at SOAR in 2019 (Tokovinin+, 2020)
J/AJ/159/19 : SOAR TESS survey. I. (Ziegler+, 2020)
J/AJ/161/144 : Inner & outer orbits in mult. stars syst. (Tokovinin, 2021)
J/AJ/162/41 : Speckle interferometry at SOAR in 2020 (Tokovinin+, 2021)
J/AJ/162/192 : SOAR TESS survey. II. Stellar companions (Ziegler+, 2021)
J/ApJS/259/66 : Eclipsing quadruple star cand. from TESS (Kostov+, 2022)
J/AJ/164/58 : Speckle Interferometry at SOAR in 2021 (Tokovinin+, 2022)
J/AJ/163/178 : The Solar Neighborhood. XLIV. SOAR obs. (Vrijmoet+, 2022)
J/AJ/166/139 : Speckle interferometry at SOAR (Mason+, 2023)
J/AJ/165/160 : Subsystems orbits in multiple stars. IX (Tokovinin, 2023)
J/AJ/165/165 : Positional measurements of 4 triple syst. (Tokovinin, 2023)
J/AJ/165/180 : SOAR Speckle Survey, nearby systems (Tokovinin, 2023)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- WDS WDS Identification (J2000)
12- 25 A14 --- Disc Discoverer Designation or Program Label
27- 47 A21 --- OName Other name (4)
49- 56 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
58- 65 F8.4 deg DEdeg Declination in decimal degrees (J2000)
67- 75 F9.4 yr Epoch [2019.5/2023.92] Epoch of observation;
Julian decimal year
77- 77 A1 --- Filt Filter used (I or y)
79- 79 I1 --- N [1/5] Number of observations used
81- 85 F5.1 deg PA Position Angle
87- 90 F4.1 mas e_PA [0/18.1] Internal error in tangential
direction
92- 97 F6.4 arcsec Sep [0.01/4.8] Separation
99-102 F4.1 mas e_Sep [0/18.1] The 1σ uncertainty in Sep
104-107 F4.1 mag Delm [-1.3/7.8] Magnitude difference of pair
109-109 A1 --- f_Delm [*:q] Flag on Delm (1)
111-111 A1 --- Tag Tag for systems not in WDS (2)
113-117 F5.1 deg (O-C)RA [-55.1/266]? The (O-C) residual in PA
119-124 F6.3 arcsec (O-C)Sep [-0.4/0.8]? The (O-C) residual in Sep
126-134 A9 --- Ref Orbit reference code (3)
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Note (1): Flag as follows:
* = Delm and the true quadrant are determined from the resolved
long-exposure image;
: = data are noisy and Delm is likely over-estimated, or tentative
resolution;
q = true quadrant is established from the SAA image.
Note (2): Tag code as follows:
A = Hipparcos-Gaia acceleration stars (K. Franson);
C = Wide pairs observed for J. Chaname;
G = Wide pairs with relative positions in Gaia DR3;
N = New pair resolved in 2023;
P = Hierarchical systems from Powell et al. (2023MNRAS.524.4296P 2023MNRAS.524.4296P);
T = Hierarchies within 100 pc (Tokovinin 2023, J/AJ/165/180);
Z = TESS objects of interest (Ziegler et al. 2021, J/AJ/162/192).
Note (3): Reference codes for this table are available at
https://crf.usno.navy.mil/data_products/WDS/orb6/wdsref.html and
are listed in refs.dat file.
Note (4): V940 Peg is a misprint for V490 Peg; ID corrected at CDS.
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS Identification (J2000)
12- 26 A15 --- Disc Discoverer Designation or Program Label
28- 42 A15 --- OName Other name
44- 51 F8.4 deg RAdeg Right Ascension in decimal degrees (J2000)
53- 60 F8.4 deg DEdeg Declination in decimal degrees (J2000)
62- 70 F9.4 yr Epoch [2023/2023.92] Epoch of observation;
Julian decimal year
72- 72 A1 --- Filt Filter used (I or y)
74- 74 I1 --- N [1/4] Number of observations used
76- 80 F5.3 arcsec MinSep [0.028/0.1] Angular resolution
82- 85 F4.2 mag Delm0.15 [0/5.51] The 5σ magnitude difference
at 0.15"
87- 90 F4.2 mag Delm1 [1.1/7.1] The 5σ magnitude difference
at 1"
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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
11- 29 A19 --- BibCode Bibcode of the reference
31- 89 A59 --- Auth First author's name(s)
91-111 A21 --- Comm Comment
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 05-Sep-2024