J/AJ/161/253 Speckle interferometry at the OAN-SPM Mexico (Guerrero+, 2021)
Speckle interferometry at the OAN-SPM Mexico: multiband astrometry of double
stars measured in 2018 and 2019.
Guerrero C.A., Zepeda C.E., Souza T.B., Najera M.R., Fernandes M.B.,
Hernandez-Aguila J.B., Carvajal J.C., Castro-Chacon J.H.,
Hernandez-Valencia B., Reyes-Ruiz M., Sanchez E., Silva J.S.
<Astron. J., 161, 253 (2021)>
=2021AJ....161..253G 2021AJ....161..253G
ADC_Keywords: Stars, double and multiple; Interferometry; Positional data;
Photometry, VRI
Keywords: Visual binary stars ; Close binary stars ; Angular separation ;
Speckle interferometry ; Astrometry ; Interferometric binary stars
Abstract:
In this paper we present multiband speckle interferometric
measurements of double stars performed at the 2.1m telescope of the
Observatorio Astronomico Nacional, San Pedro Martir, Mexico. We
focused our efforts on objects from the Washington Double Star Catalog
that were observed during five runs allocated in 2018 and 2019. We
report here 2101 astrometric and 2027 photometric measurements of 631
pairs, with angular separations ranging from 0.05" to 6.09", including
1622 measurements with separations smaller than 1", and a magnitude
difference up to 5.99mag through the V filter, 5.46mag for the R
filter, and 5.85mag for the I filter. We estimated a mean error in
separation of 12mas, 1.1° in position angle, and 0.14mag for the
magnitude difference. We confirmed 58 double stars discovered by
Hipparcos. For the first time we are presenting astrometric
measurements for 7 systems listed at the Washington Double Star
Catalog as being suspected binaries, which did not have a secondary
confirmation, and 15 stars with only one published measurement. We
identified a new close companion with a mean angular separation of
0.10", detected in a previously known pair. Finally, we present a
correction to two previously published orbital solutions of two visual
binaries.
Description:
Our observations were carried out using the 2.1m telescope of the
OAN-SPM, during five runs allocated in 2018 and 2019.
In every observing run we used an iXon Ultra 888 camera from ANDOR
technology, coupled to a filter wheel containing the three broadband
filters that we typically use, V, R, and I, with the effective
wavelengths centered at and widths of 538/90, 630/130, and 894/340nm
(for each filter, respectively), which provide diffraction-limited
resolutions of 0.053", 0.067", and 0.088", respectively.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 100 2101 Multi-band astrometry of pairs observed with
the 2.1m telescope
--------------------------------------------------------------------------------
See also:
I/209 : Catalogue of 2700 double stars (Couteau, 1995)
B/wds : The Washington Visual Double Star Catalog (Mason+, 2001-2020)
J/AJ/139/205 : 2007-2008 WIYN speckle observations of binaries (Horch+, 2010)
J/AJ/141/157 : Speckle interferometry at USNO. XVI. (Mason+, 2011)
J/AJ/142/46 : Speckle interferometry at USNO. XVII. (Mason+, 2011)
J/AJ/142/56 : Speckle interferometry at the USNO station (Hartkopf+, 2011)
J/other/RMxAA/47.211 : Speckle interferometry at OAN. III. (Orlov+, 2011)
J/AJ/143/10 : 2008-2009 WIYN speckle observations binaries VII (Horch+, 2012)
J/AJ/143/42 : Speckle interferometry with SOAR in 2010&2011 (Hartkopf+, 2012)
J/AJ/143/124 : Speckle interferometry at the USNO. XVIII. (Mason+, 2012)
J/AJ/144/56 : Speckle interferometry at SOAR in 2012 (Tokovinin+, 2012)
J/other/AstBu/67.44 : Speckle interferometry of Ap stars (Balega+, 2012)
J/other/RMxAA/48.177 : Speckle interferometry of binaries (Orlov+, 2012)
J/AJ/146/56 : Speckle interferometry at the USNO. XIX. (Mason+, 2013)
J/AJ/147/123 : Speckle interferometry with SOAR in 2012-2013 (Tokovinin+, 2014)
J/other/AstBu/69.296 : Speckle interferometry Ap stars. II. (Rastegaev+, 2014)
J/AJ/150/16 : Speckle-interferometry in Melotte 111 (Guerrero+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/150/136 : Speckle interferometry at USNO. XX. (Hartkopf+, 2015)
J/AJ/151/153 : Speckle interferometry at SOAR in 2015 (Tokovinin+, 2016)
J/AJ/153/20 : Speckle interferometry at USNO. XXI. (Mason+, 2017)
J/AJ/154/183 : Speckle interferometry at the USNO. XXII. (Mason+, 2017)
J/AJ/155/215 : Speckle interferometry of red dwarf stars (Mason+, 2018)
J/AJ/155/235 : Speckle interferometry at SOAR in 2016&2017 (Tokovinin+, 2018)
J/MNRAS/475/1725 : Astrometry double stars measured in 2011 (Guerrero+, 2018)
J/AJ/156/240 : Speckle interferometry at the USNO. XXIII. (Mason+, 2018)
J/AJ/157/211 : Unresolved binaries in TESS with speckle imaging (Matson+, 2019)
J/AJ/158/48 : Speckle interferometry at SOAR in 2018 (Tokovinin+, 2019)
J/AJ/159/266 : 12 years positional measurements 8 binaries (Mitrofanova+, 2020)
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- WDS WDS Designation in the Washington Double Star
catalog
13- 15 A3 --- Flag Flag (1)
17- 28 A12 --- Design Discoverer Designation
30- 36 F7.4 yr Epoch [18/20] Fractional Julian year of observational
epoch, Epoch+2000
38- 42 F5.1 deg PA [0/360] Position angle, θ
44- 46 F3.1 deg e_PA [0/3] Uncertainty in PA
48- 51 F4.2 arcsec Sep [0.05/6.1] Angular separation, ρ
53- 56 F4.2 arcsec e_Sep [0/0.5] Uncertainty in Sep
60- 63 F4.2 mag dmag [0/6]? Associated differential magnitude
66- 70 F5.1 deg O-Ct [-33/326]? The (O-C) residual in PA
72- 76 F5.2 arcsec O-Cr [-0.07/0.3]? The (O-C) residual in Sep
78- 96 A19 --- Ref Reference (2)
98-100 I3 nm lambda [538/894] Central wavelength of measurement
--------------------------------------------------------------------------------
Note (1): Flags as follows:
C = Ambiguous quadrant from reconstructed image. Quadrant adopted from the
latest measurement in the WDS (54 occurrences)
H = Confirmed Hipparcos double star (176 occurrences)
* = New pair detected in a previously known binary (12 occurrences)
Note (2): Reference for the publications in which the orbital elements can
be found. References are given as NASA ADS bibcodes except for
04070+3934 where "couteau1999cat" refers to the 3rd edition following
the 2nd edition of the catalog described in Couteau
(1993CED27.C......1C 1993CED27.C......1C) and indexed in Vizier as I/209A, Couteau,
1995yCat.1209....0C 1995yCat.1209....0C). The only ADS bibcode for the third edition is
Couteau (1999IAUDS.137....1C 1999IAUDS.137....1C) and it is not listed in Vizier.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 09-Aug-2021