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\IBVShead{4246}{22 September 1995}       % Use it with dummy or empty arguments

% Call for macro \title {Title of the paper}
\title{THE ECLIPSING BINARY NSV\,02980}

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NSV\,02980 (Kholopov, 1982) was photographically observed by 
Hoffmeister (1949) who found variability in this
star. NSV\,02980 (CSV\,00076) can unambiguously be identified with
the field star GSC\,0141.0638. From his observations 
Hoffmeister deduced that NSV\,02980 was an RR Lyr or W UMa type
star with a photographic magnitude variation range from 12.0 to
12.5. No photometric elements or even spectral class have been given.

From February 4 to April 12, 1995, one color photometry in the
V  band was performed using LYNXX-2 and ST-4 CCD cameras, at the
three 0.4-m telescopes at Observatorio de Piera, Observatorio de
Mollet, and Observatorio de Monegrillo (Spain). The observations
collected during this observational period show that NSV\,02980
is in fact an overcontact binary star. GSC\,0141.0390 and 
GSC\,0141.0666 were used as comparison and check stars respectively
(see Figure 1).
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\centerline{Figure 1.   C = Comparison star, Ck = Check star, V = NSV 02980. 
North is on top.}
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\centerline{Figure 2}
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Figure 2 shows the obtained light curve. Light curve dispersion
does not allow us to accurately determine the actual shape and
depth of primary and secondary minima, but it seems that the
primary minimum is a transit with a 0.45 magnitude depth and the
secondary minimum is an occultation with a 0.43 magnitude depth.

Photometric elements derived from the light curve, for the
primary minimum, are the following:

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\centerline{Min. I = HJD\,2449800.429 + 0\fd 41630$\times$E}
\hspace*{80mm}$\pm$2 \hspace*{12mm}$\pm$10
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To derive the exact nature of the binary system, we plan to
obtain more accurate observations.
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% Call for macros \authors - \authorsrightcol - \endauthors
\beginauthors
\authorsrightcol
    Joan GUARRO-FLO
    Josep M. GOMEZ-FORRELLAD
    Enrique GARCIA-MELENDO
    Joaquin VIDAL-SAINZ
    Grup d'Estudis Astronomics
    Apartado 9481
    08080 Barcelona
    Spain
    e-mail: jmgomez@astro.gea.cesca.es
\endauthors

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Hoffmeister, C., 1949, {\it Astronomische Abhandlungen,
Erganzungshefte zu den Astronomi\-schen Nachrichten}, {\bf 12}, No. 1

Kholopov, P. N., editor, 1982, New Catalogue of Suspected Variable Stars, Moscow

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