J/AJ/160/7 2019 SOAR speckle interferometry of binary stars (Tokovinin+, 2020)
Speckle interferometry at SOAR in 2019.
Tokovinin A., Mason B.D., Mendez R.A., Costa E., Horch E.P.
<Astron. J., 160, 7 (2020)>
=2020AJ....160....7T 2020AJ....160....7T
ADC_Keywords: Interferometry; Stars, double and multiple; Optical
Keywords: Binary stars ; Visual binary stars ; Multiple stars
Abstract:
The results of speckle-interferometric observations at the 4.1m
Southern Astrophysical Research Telescope in 2019 are given, totaling
2555 measurements of 1972 resolved pairs with separations from 15mas
(median 0.21") and magnitude difference up to 6mag, and
non-resolutions of 684 targets. We resolved for the first time 90 new
pairs or subsystems in known binaries. This work continues our
long-term speckle program. Its main goal is to monitor orbital motion
of close binaries, including members of high-order hierarchies and
Hipparcos pairs in the solar neighborhood. We give a list of 127
orbits computed using our latest measurements. Their quality varies
from excellent (25 orbits of grades 1 and 2) to provisional (47 orbits
of grades 4 and 5).
Description:
The observations reported here were obtained with High Resolution
Camera (HRCam), a fast imager designed to work at the 4.1m Southern
Astrophysical Research (SOAR) telescope. The camera was mounted on the
SOAR Adaptive Module (SAM). We used mostly the near-infrared I filter
(824/170nm) and the Stromgren y filter (543/22nm); two measures were
made in the R filter (596/121nm) and two in the Hα filter
(657.3/5nm).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 141 2555 Measurements of double stars at SOAR
table3.dat 98 882 Unresolved stars
table4.dat 43 90 New double stars
table5.dat 147 93 Visual orbits
table6.dat 88 34 Preliminary visual orbits
refs 71 195 References used
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+,2007)
J/AJ/121/3224 : Speckle interferometry of HIP binaries (Mason+, 2001)
J/AJ/127/1181 : Binary speckle measurements at Calar Alto (Docobo+, 2004)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/AJ/143/42 : Speckle interferometry with SOAR in 2010 & 2011 (Hartkopf+,2012)
J/AJ/144/56 : Speckle interferometry at SOAR in 2012 (Tokovinin+, 2012)
J/other/RMxAA/48.177 : Speckle interferometry of binaries (Orlov+, 2012)
J/AJ/147/123 : Speckle interferometry with SOAR in 2012-2013 (Tokovinin+, 2014)
J/AJ/150/151 : DSSI observations binaries. VI. Measures in 2014 (Horch+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfs (Benedict+, 2016)
J/AJ/152/138 : Orbits based on speckle interferometry at SOAR (Tokovinin, 2016)
J/AJ/152/213 : Interferometry & spectroscopy of sigma Orionis (Schaefer+, 2016)
J/AJ/153/212 : Observations of binary stars at the WIYN telescope (Horch+,2017)
J/AJ/154/110 : Orbits based SOAR speckle interferometry. II. (Tokovinin, 2017)
J/AJ/155/215 : Speckle interferometry of red dwarf stars (Mason+, 2018)
J/ApJS/235/6 : Updated Multiple Star Catalog; August 2019 (Tokovinin, 2018)
J/AJ/155/235 : Speckle interferometry at SOAR in 2016 & 2017 (Tokovinin+, 2018)
J/AJ/157/56 : DSSI observations of binary & trinary star systems (Horch+,2019)
J/AJ/158/48 : Speckle interferometry at SOAR in 2018 (Tokovinin+, 2019)
J/AJ/159/15 : Binary stars in Upper Scorpius (Tokovinin+, 2020)
J/AJ/159/19 : SOAR TESS survey. I. (Ziegler+, 2020)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS Idenfitication (WDS JHHMMm+DDMM)
12- 27 A16 --- DesLet Discoverer Designation
29- 40 A12 --- OName Other name
42- 49 F8.4 deg RAdeg [0.14/360] Right ascension (J2000)
51- 58 F8.4 deg DEdeg [-87.3/29.7] Declination (J2000)
60- 68 F9.4 yr Epoch.Y [2018/2020] Epoch of observation
70- 71 A2 --- Filt Filter used (I, R, y, HA or un)
73- 74 I2 --- N [1/6] Number of observations used
76- 83 F8.1 deg PA [0.1/360] Position angle
85- 89 F5.1 mas err [0/19.5] Internal error in tangential direction
91- 98 F8.4 arcsec Sep [0.01/7.64] Separation
100-104 F5.1 mas e_Sep [0/19.5] The 1σ uncertainty in Sep
106-112 F7.1 mag Delm [-1.3/9.9] Magnitude difference of pair
114-114 A1 --- f_Delm [*:q] Flag on Delm (1)
116-123 F8.1 deg (O-C)PA [-81.1/265]? The (O-C) in PA
125-132 F8.3 arcsec (O-C)Sep [-0.61/0.27]? The (O-C) in Sep
134-141 A8 --- Ref Reference code (2)
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Note (1): Flags as follows:
* = Delm and the true quadrant are determined from the resolved
long-exposure image (463 occurrences).
: = data are noisy and Delm is likely over-estimated, or tentative
resolution (164 occurrences)
q = true quadrant is established from the SAA image (857 occurrences)
Note (2): Reference codes for this Table are also available at
http://ad.usno.navy.mil/wds/orb6/wdsref.txt
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS Idenfitication (WDS JHHMMm+DDMM)
12- 27 A16 --- DesLet Discoverer Designation
29- 40 A12 --- OName Other name
42- 49 F8.4 deg RAdeg [0.13/360] Right ascension (J2000)
51- 58 F8.4 deg DEdeg [-87.1/30] Declination (J2000)
60- 68 F9.4 yr Epoch.Y [2019/2020] Epoch of observation
70- 71 A2 --- Filt Filter used (I, R y or HA)
73- 74 I2 --- N [1/6] Number of observations used
76- 82 F7.3 arcsec Sepmin [0.02/0.11] Angular resolution
84- 90 F7.2 mag Dm0.15 [0/5.32] The 5σ magnitude difference at
0.15"
92- 98 F7.2 mag Dm1 [2.08/6.8] The 5σ magnitude difference at
1"
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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 Idenfitication (WDS JHHMMm+DDMM)
12- 26 A15 --- OName Other name
28- 32 F5.3 arcsec rho [0.02/3.39] Separation
34- 36 F3.1 mag Dmag [0/7.2] Magnitude difference, companion-primary
39- 41 A3 --- Type Object type (1)
43- 43 A1 --- f_Type [b] Flag on Type, b=Confirmed (31 occurrences)
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Note (1): Types as follows:
HIP = Hipparcos suspected binary (67 occurrences)
MSC = multiple system (3 occurrences)
REF = reference star (12 occurrences)
SB = spectroscopic binary (2 occurrences)
WDS = neglected pair (6 occurrences)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
-------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS Idenfitication (WDS JHHMMm+DDMM)
12- 17 I6 --- HIP [975/659820]? Hipparcos identifier
19- 31 A13 --- DesLet Discoverer Designation
33- 40 F8.4 yr Per [1.47/255] Orbital Period
42- 48 F7.4 yr e_Per [0/20.8]? Uncertainty in Per (1)
50- 58 F9.4 yr T [1841/2031] Time of periastron passage
60- 65 F6.4 yr e_T [0.002/6.5] Uncertainty in T
67- 72 F6.4 --- e [0.02/0.99] Orbital eccentricity
74- 79 F6.4 --- e_e [0.001/0.25]? Uncertainty in e (1)
81- 87 F7.5 arcsec a [0.03/2.16] Semi-major axis of the orbit
89- 95 F7.5 arcsec e_a [0.0005/0.23] Uncertainty in a
97-102 F6.2 deg Omega [1.6/353] Position angle of the node (Ω)
104-108 F5.2 deg e_Omega [0.1/35] Uncertainty in Omega
110-115 F6.2 deg omega [0/359] Longitude of periastron (ω)
117-122 F6.2 deg e_omega [0.2/134]? Uncertainty in omega (1)
124-129 F6.2 deg i [0/180] Inclination
131-135 F5.2 deg e_i [0.2/53.7]? Uncertainty in i (1)
137-137 I1 --- Grade [1/5] Grade
139-146 A8 --- Ref Reference code (2)
147-147 A1 --- f_Ref Reference flag, *= combined (uses radial
velocities, 7 occurrences)
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Note (1): Null values for uncertainties mean that the values were fixed in the
orbital fit.
Note (2): Reference codes for this Table are also available at
http://ad.usno.navy.mil/wds/orb6/wdsref.txt
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS Idenfitication (WDS JHHMMm+DDMM)
12- 24 A13 --- DesLet Discoverer Designation
26- 34 F9.4 yr Per [0.25/3500] Orbital Period
36- 44 F9.4 yr T [1979/2112] Time of periastron passage
46- 50 F5.3 deg e [0/0.99] Orbital eccentricity
52- 58 F7.4 arcsec a [0.01/14.6] Semi-major axis of the orbit
60- 64 F5.1 deg Omega [1.3/352] Position angle of the node (Ω)
66- 70 F5.1 deg omega [0/355] Longitude of periastron (ω)
72- 76 F5.1 deg i [0/180] Inclination
78- 78 I1 --- Grade [3/5] Grade
80- 87 A8 --- Ref Reference code (1)
88- 88 A1 --- f_Ref Reference flag, *= combined (uses radial
velocities, 1 occurrence)
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Note (1): Reference codes for this Table are also available at
http://ad.usno.navy.mil/wds/orb6/wdsref.txt
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Byte-by-byte Description of file: refs
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 8 A8 --- Ref Reference used
10- 29 A20 --- Autor First autor of the reference
31- 49 A19 --- BIB BIBcode
51- 71 A21 --- Cat Catalog or comment
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 01-Oct-2020