GEOS Circulares

GEOS Circulares

Todos los archivos están en formato pdf de Adobe Acrobat // All archives are in pdf Adobe Acrobat format

GEOS CIRCULAR ON ECLIPSING BINARIES

EB 00	(1978)	Preliminary declaration
EB 01	(1978)	The under-observed star AY Pegasi as a new Algol-type variable with a 2,439 day period
EB 02	(1979)	1 Persei, a low amplitude eclipsing binary, has a period of 25,939 days and an elliptical orbit
EB 03	(1979)	List of minima
EB 04	(1979)	First ephemeris for VZ Psc, an EW-type binary system
EB 05	(1980)	Observations visuelles de VW Cephei en 1975
EB 06	(1981)	List of minima and accurate determination of mean minimum for VW Cep
EB 07	(1983)	Analysis of curves and determination of the orbital elements for the variables KR Lac, MQ Cep, GS Lac, LW Lac
EB 08	(1983)	44 times of minimum and first ephemeris for the EW star FZ Orionis
EB 09	(1983)	Minima of VW Cephei observed in summer 1978 and accurate determination of a mean minimum
EB 10	(1983)	Large O-C noted for RT Ursae Minoris
EB 11	(1983)	LO Andromedae, a new close eclipsing binary system
EB 12	(1984)	Eclipsing variable stars in neighbouring galaxies, I - variable G in M31 Andromedae
EB 13	(1984)	List of minima and accurate determination of mean minimum for V567 Oph
EB 14	(1986)	Eclipsing variable stars in neighbouring galaxies, II - discussion of the light curve of V55 in NGC 2403
EB 15	(1986)	Eclipsing variable stars in neighbouring galaxies, III - discussion of light curve of V31 in IC 1613
EB 16	(1988)	19 times of minima and first ephemeris for the EB star RRVI-51
EB 16 rev	(1990)	19 times of minima and first ephemeris for the EB star RRVI-51 (revised edition)
EB 17	(1990)	Revised ephemeris for the eclipsing binary PP Lac
EB 18	(1990)	Revised ephemeris for the eclipsing variable V2203 Ophiuchi
EB 19	(1991)	Revised ephemeris for the eclipsing binary RS Ser
EB 20	(1992)	RT Ursae Minoris, an eclipsing binary with variable period
EB 21	(1993)	NSV 7457 Her, a new EW star with an unusual B-V light curve
EB 22	(1993)	AP And, results of the first photoelectric measurements and revision of the elements
EB 23	(1996)	New elements for the period of BI CVn
EB 24	(1996)	NSV 5598 is not a rapid variable star
EB 25	(1999)	NSV 11321 Lyr, variability and light elements
EB 26	(2001)	NSV 5339, a very short period EB variable
EB 27	(2000)	The period elements of V501 Her
EB 28	(2002)	V1125 Oph, type and period
EB 29	(2010)	Photometric characteristics of the of the eclipsing binary V355 Aur
EB 30	(2011)	Visual estimates and TAROT measurements of MP Del
EB 31	(2017)	V566 Oph
EB 32	(2021)	AY Peg, a large amplitude Algol-type star

GEOS CIRCULAR ON ASTEROIDAL OCCULTATIONS

AO 00	(1985)	Preliminary declaration
AO 01	(1985)	Surveillance of predicted events, fisrt list july-october 1984
AO 02	(1985)	Surveillance of predicted events, second list november-december 1984

GEOS CIRCULAR ON CEPHEIDS

CEP 00	(1983)	Preliminary declaration
CEP 01	(1986)	Determinations of maxima for V526 Aql, BD Cas and V514 Cyg, Important O-C values observed for V526 Aql and BD Cas
CEP 02	(2014)	GEOS RR Lyr survey: FM Del is indeed a cepheid
CEP 03	(2022)	Period variation of the classical Cepheid SV Vul over a century (1913-2022)
CEP 04	(2023)	A new value of the period of cepheid RT Aur on the basis of 456 times of maximum, 1897-2023
CEP 05	(2024)	New OCs for the classical cepheids RY Cas and V Lac over a century (1873-2022)
CEP 06	(2024)	Period variation of the classical cepheid W Gwm over a century (1895-2024)

GEOS CIRCULAR ON RR LYR TYPE VARIABLES

RR 00	(1978)	Preliminary declaration
RR 01	(1978)	FO Virginis, 1977 observations
RR 02	(1980)	131 new maxima of the light variations of DY Herculis
RR 03	(1982)	133 times of maximum and the fisrt ephemeris for the RRc star VZ Draconis
RR 04	(1982)	New maxima of CY Aquarii obsedrved in august 1980 and accurate determination of a mean maximum
RR 05	(1984)	Improved element for the dwarf cepheid V657 Oph
RR 06	(1983)	BP Peg, 74 times of maxima, improvement of the ephemeris and evidence of visually observed blazhko effect
RR 07	(1983)	Photoelectric observations of CY Aquarii observed in august 1982 at the Junjfraujoch observatory
RR 08	(1985)	A new period of AX UMa
RR 09	(1985)	Analysis of 1961-1982 maxima of VZ Draconis, an RRc with a variable period
RR 10	(1987)	A revised ephemeris for the RRab variable BB Bootis
RR 11	(1988)	Observations of CY Aquarii 1981-1984 and recent evolution of the period
RR 12	(1993)	Improvement of the period for the RR Lyr star TZ Aurigae
RR 13	(1995)	NSV 4219 UMa, an RR Lyr variable of the RRab type
RR 14	(1997)	List of visual and photographic maxima of the RR Lyrae stars
RR 15	(1998)	List of visual and photographic maxima of RR Lyrae stars
RR 16	(1999)	List of visual, photographic and CCD maxima of RR Lyrae stars
RR 17	(2001)	List of visual dns CCD maxima of RR Lyrae stars
RR 18	(2002)	VW CVn, a very irregular RR Lyrae star
RR 19	(2003)	List of visual, CCD and photoelectric maxima of RR Lyrae stars
RR 20	(2003)	Fisrt light elements for the RR Lyr star NSV 7366
RR 21	(2004)	Maxima of RR Lyr stars observed by the automated telescope TAROT
RR 22	(2004)	List of visual and photographic maxima of RR Lyrae stars (1974-1991)
RR 23	(2005)	List of visual maxima of RR Lyrae stars
RR 24	(2005)	Second list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 25	(2005)	Third list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 26	(2006)	Fourth list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 27	(2006)	List of photoelectric, CCD and visual maxima of RR Lyrae stars.pdf
RR 28	(2006)	Fifth list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 29	(2007)	Sixth list of maxima of the GEOS RR Lyr survey
RR 30	(2007)	List of CCD and visual maxima of RR Lyrae stars
RR 31	(2007)	Seventh list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 32	(2008)	List of visual maxima of RR Lyrae stars
RR 33	(2008)	Eighth list of maxima of the GEOS RR Lyr survey
RR 34	(2008)	New ephemerides of RR Lyrae stars
RR 35	(2008)	Ninth list of maxima of RR Lyr stars observed by the automated telescopes TAROT
RR 36	(2008)	List of CCD and visual maxima of RR Lyrae stars
RR 37	(2009)	Tenth list of maxima of RR Lyr stars observed by the automated telescopes TAROT
RR 38	(2009)	List of CCD and visual maxima of RR Lyrae stars
RR 39	(2009)	Eleventh list of maxima of RR Lyr stars observed by the automated telescopes TAROT
RR 40	(2016)	List of CCD and visual maxima of RR Lyrae stars
RR 41	(2016)	GY Peg, a new strongly varying Blazhko RRab variable
RR 42	(2016)	V759 Cyg, a RR Lyr variable with a small amplitude Blazhko effect
RR 43	(2016)	Twelfth list of maxima of RR Lyr stars observed by the automated telescopes TAROT
RR 44	(2016)	List of light maxima of RR Lyr stars observed with the robotic telescope FARO nov-2008 jan-2010
RR 45	(2016)	List of CCD, photographic and visual maxima of RR Lyr stars
RR 46	(2016)	The GEOS RR Lyr Survey. Thirteent list of maxima
RR 47	(2016)	List of CCD and visual maxima of RR Lyr stars
RR 48	(2016)	The GEOS RR Lyr Survey. Fourteent list of maxima
RR 49	(2016)	List of CCD and visual maxima of RR Lyr stars
RR 50	(2016)	List of visual maxima of RR Lyr stars
RR 51	(2016)	Fifteenth list of maxima of RR Lyr stars observed by the automated telescope TAROT
RR 52	(2016)	List of visual maxima of RR Lyr stars
RR 53	(2016)	New insight into the period variations in field Galactic RRab stars
RR 54	(2016)	List of visual maxima of RR Lyr stars
RR 55	(2016)	List of visual maxima of RR Lyr stars
RR 56	(2016)	List of visual maxima of RR Lyr stars
RR 57	(2016)	List of visual maxima of RR Lyr stars
RR 58	(2018)	CCD and DSLR maxima of RR Lyrae stars in 2016 and 2017
RR 59	(2018)	List of visual maxima of RR Lyrae stars
RR 60	(2019)	Observations of te RRC variable Linear 1169665 with the robotic telescope Tarot
RR 61	(2020)	List of visual maxima of RR Lyrae stars
RR 62	(2023)	Observations of the suspcted RR Lyr stars NSV 14172 and NSV 14264
RR 63	(2023)	Study of variable star ASASSN-V J104912.47+274312.7 a rare peculiar RRc star

GEOS CIRCULAR ON SMALL AMPLITUDE VARIABLES

SA 00	(1981)	Preliminary declaration
SA 01	(1981)	The Be star HD 58050 as a new 3-hour period large amplitude Beta CMa variable

GEOS CIRCULAR ON RED VARIABLE STARS

SR 00	(1978)	Preliminary declaration
SR 01	(1978)	Resultats de la premiere campagne franco-italienne d'observations d'etoiles variables, OP Her
SR 02	(1981)	WY Gem, a new semi-regular variable with peruiod of 169 days
SR 03	(1983)	7-passband photometry of variable star V449 Cygni and its comparison stars
SR 04	(1983)	No eclipses in the Lb variable star RR Arietis
SR 05	(1984)	Photoelectric B and V photometry of comparison stars for eight mira-type variable star fields
SR 06	(1985)	Periodical features in the Lc variable star BU Geminorum during the years 1972-1977
SR 07	(1985)	Photoelectric B and V photometry of comparison stars for U Cyg and X Oph
SR 08	(1986)	V2113 Oph, four years of observations 1982-85
SR 09	(1986)	Photoelectric B and V photometry of comparison stars for seven mira-type variable stars
SR 10	(1987)	The highly probable constancy of IS Geminorum
SR 11	(1989)	Photoelectric B and V band photometry of comparison stars in 12 variable star fields
SR 12	(1989)	Photoelectric B and V band photometry of comparison stars for BC Oph
SR 13	(1995)	U Del slow variations with two apparent periods
SR 14	(2010)	Visual estimates and TAROT measurement of FG Boo
SR 15	(2022)	Photometric survey of V449 Cyg (1974-2022)

GEOS CIRCULAR ON NEW VARIABLES

NV 01	(2011)	New variable starts in Camelopardalis and Monoceros
NV 02	(2018)	New variable starts in Perseus

GEOS CIRCULAR ON DELTA SCUTI

DSCT 01

(2020)

VZ Cnc

DSCT 02

(2021)

GSC 03390-01921, a new amplitude Delta Scuti star in Auriga