- ID:
- ivo://CDS.VizieR/J/AZh/86/158
- Title:
- UBVR light curves of GSC 4596-1254 = SAO 3282
- Short Name:
- J/AZh/86/158
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have obtained the first UBVR photoelectric light curves for a recently discovered eclipsing binary with a period of 9.33d and an appreciable eccentricity (e=0.08). We have used these data to determine the photometric elements of the system for a model with two spherical stars with linear limb darkening. The high accuracy of the observations enabled determination of the absolute parameters of the components using available calibrations. The masses of the components are 1.28 and 1.08M_{sun}_, and their ages are two billion years. The present orientation of the orbital ellipse is unfavorable for studies of the apsidal rotation, which is essentially due to relativistic effects.
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Search Results
- ID:
- ivo://CDS.VizieR/J/PAZh/23/626
- Title:
- UBVR photometry of binaries GG Ori and OS Ori
- Short Name:
- J/PAZh/23/626
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Photoelectric UBVR photometry of 2 eclipsing variables are presented. Each binary was observed between 1989 and 1995 with the 60 cm telescopes at the Maidanak Observatory (Uzbekistan).
- ID:
- ivo://CDS.VizieR/J/PAZh/24/145
- Title:
- UBVR photometry of V1481 Cyg
- Short Name:
- J/PAZh/24/145
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The results of a UBVR photometry observations are presented for eclipsing binary V1481 Cyg in the open cluster NGC 7128. The binary was observed between 1993 and 1995 with the 1m and 0.6m telescopes at Maidanak Observatory (Uzbekistan).
- ID:
- ivo://CDS.VizieR/J/A+A/340/196
- Title:
- ubvyHbeta photometry of AB Cas
- Short Name:
- J/A+A/340/196
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Table 1 contents 471 simultaneous measurements collected in each of the four uvby colours of the Stroemgren photometric system for the eclipsing binary system AB Cas. Because of an instrumental problem, 82 points in the b channel (during the last observational night) had to be rejected (the corresponding magnitudes are listed as 0.0000). The data are magnitude differences (Du,Dv,Db,Dy) of the variable star minus comparison star in the instrumental system versus Heliocentric Julian Day. Table 2 is the same, but for H{beta} (80 points). The comparison star is BD+70 0188. The origin in time is the Julian Day 2447117. The observations were carried out (by E. Rodriguez, A. Claret, J.L. Sedano, J.M. Garcia and R. Garrido) during 1987 and 1988 using the 0.90m telescope at the Sierra Nevada Observatory, Spain.
- ID:
- ivo://CDS.VizieR/J/A+AS/128/139
- Title:
- ubvy photometry of CR Cas
- Short Name:
- J/A+AS/128/139
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The table contains the differential magnitudes of CR Cas respect to comparison star SAO35044 indicating the time (Julian Date) a nd magnitudes in Stroemgren filters u, v, b, y
626. U Gem spectroscopy
- ID:
- ivo://CDS.VizieR/J/MNRAS/361/1091
- Title:
- U Gem spectroscopy
- Short Name:
- J/MNRAS/361/1091
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a phase-resolved spectroscopic study of the secondary star in the cataclysmic variable (CV) U Gem. We use our data to measure the radial velocity semi-amplitude, systemic velocity and rotational velocity of the secondary star. Combining this with literature data allows us to determine masses and radii for both the secondary star and white dwarf, which are independent of any assumptions about their structure. We use these to compare their properties to those of field stars and find that both components follow field mass-radius relationships. The secondary star has the mass, radius, luminosity and photometric temperature of an M2 star, but a spectroscopic temperature of M4. The latter may well be due to a high metallicity. There is a troubling inconsistency between the radius of the white dwarf inferred from its gravitational redshift and inclination and that inferred from its temperature, flux and astrometric distance.
- ID:
- ivo://CDS.VizieR/J/MNRAS/385/1749
- Title:
- UNSW catalog of Variable Stars
- Short Name:
- J/MNRAS/385/1749
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a new catalogue of variable stars compiled from the data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target fields were each observed for one to four months, resulting in ~87000 high-precision light curves with 16004400 data points. We have extracted a total of 850 variable light curves, 659 of which do not have a counterpart in the General Catalogue of Variable Stars, the New Suspected Variables catalogue or the All Sky Automated Survey southern variable star catalogue. The catalogue is detailed here, and includes 142 Algol-type eclipsing binaries, 23 beta Lyrae-type eclipsing binaries, 218 contact eclipsing binaries, 53 RR Lyrae stars, 26 Cepheid stars, 13 rotationally variable active stars, 153 uncategorized pulsating stars with periods <10d, including delta Scuti stars, and 222 long period variables with variability on time-scales of >10d.
- ID:
- ivo://CDS.VizieR/J/ApJS/238/4
- Title:
- Updated cat. of Algol-type binaries from CSSs
- Short Name:
- J/ApJS/238/4
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present an updated catalog of 4680 northern eclipsing binaries (EBs) with Algol-type light-curve (LC) morphology (i.e., with well-defined beginnings and ends of primary and secondary eclipses), using data from the Catalina Sky Surveys. Our work includes revised period determinations, phenomenological parameters of the LCs, and system morphology classifications based on machine-learning techniques. While most of the new periods are in excellent agreement with those provided in the original Catalina catalogs, improved values are now available for ~10% of the stars. A total of 3456 EBs were classified as detached and 449 were classified as semi-detached, while 145 could not be classified unambiguously into either subtype. The majority of the SD systems seem to be comprised of short-period Algols. By applying color criteria, we searched for K- and M-type dwarfs in these data, and present a subsample of 609 EB candidates for further investigation. We report 119 EBs (2.5% of the total sample) that show maximum quadrature light variations over long timescales, with periods bracketing the range 4.5-18 years and a fractional luminosity variance range of 0.04-0.13. We discuss possible causes for this, making use of models of variable starspot activity in our interpretation of the results.
- ID:
- ivo://CDS.VizieR/J/A+AS/123/1
- Title:
- uvbyBeta photometry of ZZ UMa
- Short Name:
- J/A+AS/123/1
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper presents first complete uvby light curves of the late-type detached eclipsing binary ZZ UMa (G0V + G8V, P=2.2993d). This binary system has been observed during eight campaigns at the Calar Alto Observatory (Almeria, Spain) and at the Sierra Nevada Observatory (Granada, Spain). 294 points distributed over the binary period and covering both eclipses are given. The comparison stars used to calculate the differential light curves (SAO 15242 and SAO 15251) were confirmed as being good reference stars with constant flux. These observations are part of a 6 year uvby and H{beta} monitoring program of low mass eclipsing binaries whose main objective is to provide accurate absolute astrophysical parameters for late-type main sequence stars. Details about the standardisation process and accuracy of the photometry are also given. The internal accuracy of the standard photometry measured as the mean RMS of the differences between standard and observed values for the standard stars observed along the program is only a few millimagnitudes. Detailed analysis of ZZ UMa, based on these light curves, will be published separately (Clement et al., 1997, Cat. <J/A+AS/123/59>).
- ID:
- ivo://CDS.VizieR/J/A+A/358/553
- Title:
- uvby differential photometry of V578 Mon
- Short Name:
- J/A+A/358/553
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Differential Stroemgren photometry of the eclipsing binary V578 Mon expressed relative to the primary comparison star NGC 2244-115 (HD 46106). The data were obtained at the SAT telescope at La Silla in 1992 (49 observations by J. Andersen) and in 1994 (199 observations by H. Hensberge) and have an accuracy of typically 3 millimag.
