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- ID:
- ivo://CDS.VizieR/J/AJ/147/119
- Title:
- Catalog of sources in the Kepler field of view
- Short Name:
- J/AJ/147/119
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Kepler mission has to date found almost 6000 planetary transit-like signals, utilizing three years of data for over 170000 stars at extremely high photometric precision. Due to its design, contamination from eclipsing binaries, variable stars, and other transiting planets results in a significant number of these signals being false positives (FPs). This directly affects the determination of the occurrence rate of Earth-like planets in our Galaxy, as well as other planet population statistics. In order to detect as many of these FPs as possible, we perform ephemeris matching among all transiting planet, eclipsing binary, and variable star sources. We find that 685 Kepler Objects of Interest (KOIs)--12% of all those analyzed--are FPs as a result of contamination, due to 409 unique parent sources. Of these, 118 have not previously been identified by other methods. We estimate that ~35% of KOIs are FPs due to contamination, when performing a first-order correction for observational bias. Comparing single-planet candidate KOIs to multi-planet candidate KOIs, we find an observed FP fraction due to contamination of 16% and 2.4% respectively, bolstering the existing evidence that multi-planet KOIs are significantly less likely to be FPs. We also analyze the parameter distributions of the ephemeris matches and derive a simple model for the most common type of contamination in the Kepler field. We find that the ephemeris matching technique is able to identify low signal-to-noise FPs that are difficult to identify with other vetting techniques. We expect FP KOIs to become more frequent when analyzing more quarters of Kepler data, and note that many of them will not be able to be identified based on Kepler data alone.
- ID:
- ivo://CDS.VizieR/J/A+A/417/263
- Title:
- Catalogue of Algol type binary stars
- Short Name:
- J/A+A/417/263
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A catalogue of (411) Algol-type (semi-detached) binary stars is presented in the form of five separate tables of information. The catalogue has developed from an earlier version (Budding, 1984, Cat. <V/46>) by including more recent information and an improved layout. A sixth table lists (1872) candidate Algols, about which fewer details are known at present. Some issues relating to the classification and interpretation of Algol-like binaries are also discussed.
- ID:
- ivo://CDS.VizieR/J/MNRAS/370/2013
- Title:
- Catalogue of close binaries
- Short Name:
- J/MNRAS/370/2013
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A catalogue of close eclipsing binary systems (detached and semidetached) with at least one of the components located in the delta Scuti region of the Cepheid instability strip is presented. The positions of the stars in the instability strip are determined by their accurate temperatures and luminosities. Observationally detected binaries (20 semidetached, four detached and one unclassified) with oscillating components were included in the catalogue as a separate table. The primaries of the oscillating Algols tend to be located near the blue edge of the instability strip. Using reliable luminosities and temperatures determined by recent photometric and spectroscopic studies, we have found that at least one or two components of 71 detached and 90 semidetached systems are located in the delta Scuti region of the Cepheid instability strip. In addition, 36 detached or semidetached systems discovered by the Hipparcos satellite were also given as a separate list. One of their components is seen in the delta Scuti region, according to their spectral type or BV colours. They are potential candidate binaries with the delta Scuti-type pulsating components which need further photometric and spectroscopic studies in better precision. This catalogue covers information and literature references for 25 known and 197 candidate binaries with pulsating components.
- ID:
- ivo://CDS.VizieR/J/MNRAS/331/609
- Title:
- Catalogue of eclipsing binaries in the SMC
- Short Name:
- J/MNRAS/331/609
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The catalogue lists 167 eclipsing binary stars in the Small Magellanic Cloud detected in the database of time-series photometry for 400000 SMC stars acquired by the Microlensing Observations in Astrophysics (MOA) project during 1997. Coordinates, ephemerides, magnitudes and light curves are presented. Thirty-five systems are new detections. The limiting magnitude is about 17.5. The majority of periods lie within the range 0.4 to 20 days; 6 systems are possibly eccentric while 14 are probably or certainly so. The majority of the newly-identified systems lie in the outer regions of the SMC.
- ID:
- ivo://CDS.VizieR/J/A+A/446/785
- Title:
- Catalogue of eclipsing variables
- Short Name:
- J/A+A/446/785
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A new catalogue of 6330 eclipsing variable stars is presented. The catalogue was developed from the General Catalogue of Variable Stars (GCVS) and its textual remarks by including recently published information about classification of 843 systems and making corresponding corrections of GCVS data. The catalogue represents the largest list of eclipsing binaries classified from observations.
- ID:
- ivo://CDS.VizieR/J/AN/334/860
- Title:
- Catalogue of eclipsing variables. Version 2
- Short Name:
- J/AN/334/860
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A new version of the Catalogue of Eclipsing Variables is presented. The catalogue contains parameters and morphological types of light curves for some 7200 stars. Spectral classification is also given when available. Recently published information about classification of 1352 systems is included in the catalogue. The catalogue represents the largest list of eclipsing binaries with available classification.
- ID:
- ivo://CDS.VizieR/V/119
- Title:
- Catalogue of field contact binary stars
- Short Name:
- V/119
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The catalogue of 361 galactic contact binaries is presented. Enlisted contact binaries are divided into five groups according to the type and quality of the available observations and parameters. For all systems the ephemeris for the primary minimum, minimum and maximum visual brightness and equatorial coordinates are given. If available, photometric elements, (M_1_+M_2_)*(sin)i^3^, spectral type, parallax and magnitude of the O'Connell effect are also given. Photometric data for several systems are augmented by new observations. The quality of the available data is assessed and systems requiring modern light-curve solutions are selected. Selected statistical properties of the collected data are discussed.
- ID:
- ivo://CDS.VizieR/J/AJ/137/236
- Title:
- CC Com and BV Dra light curves
- Short Name:
- J/AJ/137/236
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Based on O-C curves, we present detailed period investigations of two weak-contact binaries CC Com and BV Dra. It is found that the periods of these two binaries have varied in a cyclic variation way superposed on a secular period change. The periods and amplitudes of the cyclic variations are P_3_=23.6(+/-0.4)yr and A=0.0028(+/-0.0003)d for CC Com and P_3_=23.8(+/-0.6)yr and A=0.0029(+/-0.0003)d for BV Dra.
- ID:
- ivo://CDS.VizieR/J/A+AS/111/229
- Title:
- CCD meas. of visual binaries
- Short Name:
- J/A+AS/111/229
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report CCD measurements of 33 visual double stars observed at the 1-meter coude reflector of the Observatorio de Llano del Hato located at Merida, Venezuela. We also present an algorithm to determine the stars' centroids for superimposed images as well as a brief comparison of accuracies attained by the algorithm and the program CENTER of the IRAF package.
