scholarly journals AU Leonis: an Extragalactic Object in the General Catalogue of Variable Stars

1974 ◽  
Vol 86 ◽  
pp. 668 ◽  
Author(s):  
Howard E. Bond ◽  
Richard F. Green ◽  
John P. Huchra
Keyword(s):  
Variable Stars ◽  
Extragalactic Object ◽  
General Catalogue

General Catalogue of Variable Stars: Modern Trends

2000 ◽  
Vol 9 (4) ◽  
Author(s):  
Ν. N. Samus ◽  
E. V. Kazarovets ◽  
Ο. V. Durlevich
Keyword(s):  
Variable Stars ◽  
General Catalogue

Version 5.1 of the General Catalogue of Variable Stars for the Constellation Cepheus

2018 ◽  
Vol 62 (12) ◽  
pp. 1050-1094
Author(s):  
N. N. Samus’ ◽  
O. V. Durlevich ◽  
E. V. Kazarovets ◽  
N. N. Kireeva ◽  
E. N. Pastukhova
Keyword(s):  
Variable Stars ◽  
General Catalogue

scholarly journals Forthcoming Cepheid Database

1989 ◽  
Vol 111 ◽  
pp. 263-263
Author(s):  
J. Donald Fernie ◽  
Nancy Remage Evans
Keyword(s):  
Variable Stars ◽  
Period Change ◽  
Fourth Edition ◽  
Classical Cepheid ◽  
Computer Version ◽  
General Catalogue ◽  
Basic Parameters

AbstractA summary of basic parameters of classical Cepheid variable stars is being prepared. It will contain stars from the fourth edition of the General Catalogue of Variable Stars in the categories CEP, CEP(B), DCEP, and DCEPS, excluding those which belong to Population II according to the criteria of Harris (1985, A.J.,90, 756). V and B intensity means, as well as velocity means are derived from Fourier fits using the N. Simon program MINFIT. In addition to the data contained in the catalogue by Fernie and Hube (1968, A.J., 73, 492), it will provide a comparison of reddenings from a number of sources, binary status, and period change information. We anticipate a hardcopy version, and also a version on floppy disks. The computer version uses dBaselll, and will include programs, for instance, to calculate phases using changing periods.

scholarly journals On the periodicity of Hubble-Sandage objects in M 31

1989 ◽  
Vol 113 ◽  
pp. 275-276
Author(s):  
G. R. Ivanov
Keyword(s):  
Variable Stars ◽  
Astronomical Observatory ◽  
General Catalogue ◽  
M 31 ◽  
Η Car

The spectral and photometric characteristics of the Hubble-Sandage objects (HSO) are similar to those of the η Car and S Dor variables. They are actually referred to as S Dor-type in the General Catalogue of Variable Stars. Their light variations differ from star to star.The aim of the present paper is to discuss a possible periodicity in HSOs in M 31. We used phtometry from Hubble(1929), Sharov(1973, 1981), Rosino and Bianchini(1973), and added some observations taken during 1980-87. The latter were obtained with the 2-m Ritchey-Chretien-Coude and 0.5-m Schmidt telescopes of the Bulgarian National Astronomical Observatory – Rozhen.

scholarly journals Non-solar gamma and X-ray astronomy: optical observations: (Invited discourse)

1970 ◽  
Vol 37 ◽  
pp. 151-161
Author(s):  
Hugh M. Johnson
Keyword(s):  
Variable Stars ◽  
Optical Observations ◽  
X Rays ◽  
Spectral Measurements ◽  
Optical Identification ◽  
Stellar Spectrum ◽  
X Ray ◽  
General Catalogue ◽  
The Continuum

An optical astronomer enters this field only by courtesy of those X-ray astronomers who pay some attention to accurate positional measurements of X-ray sources. So my first and last words are to ask X-ray observers to give more time to establishing positions of X-ray sources. It appears that in fact most effort has been spent on spectral measurements of X-rays, and this has led just to the classification of sources according to either of two mechanisms for the production of the continuum. In one or two early instances the extrapolated X-ray spectrum has been useful for predicting the brightness of the optical counterpart to be found. A typical uncertainty of making optical identification is that of Vel XR-1 for which Gursky et al. (1968) have given a position with an error box of 3 square degrees. One candidate I can suggest for this is CU Vel, the only variable star of the 1958 General Catalogue of Variable Stars inside the error box. It is interesting because it is assigned to the U Gem class with a range of photographic magnitudes from 10.7 to 15.5. The stellar spectrum has not been observed.

Some Dependences for Long-Period Variables and a Possible Scheme of their Evolution

1989 ◽  
Vol 131 ◽  
pp. 451-451
Author(s):  
I. L. Andronov ◽  
L. S. Kudashkina ◽  
G. M. Rudnitskij
Keyword(s):  
Light Curve ◽  
Color Index ◽  
Variable Stars ◽  
Maser Emission ◽  
Long Period ◽  
General Catalogue ◽  
Long Period Variables ◽  
Molecular Lines ◽  
Visual Light

Some dependences between the parameters for approximately 150 stars, of which 81 are sources of maser emission in molecular lines, are constructed. The following parameters are considered: period P, asymmetry (M-m) of the visual light curve, visual amplitude A, color index (I-K). We use the data of the General Catalogue of Variable Stars. For the stars Z Cyg, R Tau, R Peg, RT Vir, RX Boo, PZ Cas, U Her, and R Cas, some parameters were determined by the authors.

scholarly journals Hipparcos Stars in The GCVS

1998 ◽  
Vol 11 (1) ◽  
pp. 550-550
Author(s):  
N.N. Samus
Keyword(s):  
Data Base ◽  
Variable Stars ◽  
Spectroscopic Binaries ◽  
Spectroscopic Binary ◽  
Multiple Stars ◽  
General Catalogue ◽  
Hipparcos Catalogue ◽  
Double And Multiple Stars ◽  
Colour Indices

Prof. M. Grenon asked the team of the General Catalogue of Variable Stars to attribute GCVS names to new Hipparcos variables in order to present, in the Hipparcos Catalogue, the information on these stars already with final designations. We received lists of 5665 variables. Of them, 3157 qualified to the standard GCVS criteria and will appear in the 74th Namelist of variable stars. The main problems in compiling the Namelist were the following: 1. Cases of spurious variability for double and multiple stars and for misidentified stars (wrong colour indices used in reductions). Some wrong identifications come from the SIMBAD data base. 2. Lacking identifications with catalogues of spectroscopic binaries. Some stars attributed to slowly pulsating B variables are in fact ellipsoidal variables. HIP 98954 = V1472 Aql was classified as a semiregular star, but it is a rather unusual, probably eclipsing, star (Samus, 1997), a known spectroscopic-binary M giant with a 200d period (Lucke and Mayor, 1982).

scholarly journals An electronic version of volume I of the General Catalogue of Variable Stars with improved coordinates

2002 ◽  
Vol 28 (3) ◽  
pp. 174-181 ◽  
Author(s):  
N. N. Samus’ ◽  
V. P. Goranskii ◽  
O. V. Durlevich ◽  
A. V. Zharova ◽  
E. V. Kazarovets ◽  
...  
Keyword(s):  
Electronic Version ◽  
Variable Stars ◽  
General Catalogue

scholarly journals Commission 27. Variable Stars (Etoiles Variables)

1997 ◽  
Vol 23 (1) ◽  
pp. 325-361
Keyword(s):  
Variable Stars ◽  
Home Page ◽  
Hard Work ◽  
Information Bulletin ◽  
Electronic Form ◽  
Final Volume ◽  
General Catalogue ◽  
Scientific Standard

The three special projects sponsored by Commission 27: the Information Bulletin on Variable Stars (IVBS), the Archives of Unpublished Observations of Variable Stars, and the General Catalogue of Variable Stars (GCVS) continue to serve the astronomical community. Katalin Oláh, Laszlo Szabados, András Holl, Zsolt Kővári and their colleagues have made the Bulletin available in electronic form, including back issues. In addition, Andras Holl succeeded in setting up a WWW home page for our commission. Chris Sterken and the Editorial Board strived to maintain high scientific standard of the IVBS. The Archives, under Ed Schmidt, increased to over three hundred files. Nikolai N. Samus and his co-workers published the final volume of the 4th edition of the GCVS. The Catalogue is also available electronically. All these people should be highly prized for their hard work for the IAU and astronomers at large.

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