[vsnet-chat 5751] New variable star in M13

["Francisco A. Violat Bordonau" <fviolat@yahoo.es>]

Dear Colleagues:

We have confirmed the variability of L940, a new
variable star “red giant”, located in the Eastern side
of the cluster. Its the second new variable star
discovered from my us (first L414, and now L940).

With the idea to search, measure and to determine the
present parameters of new variable stars in M13 we
have studied M13 during a period of 521days (of DJ
2,452,076 to DJ 2,452,596, both inclusively), and
measured during 129 nights (DJ 2,452,076 to 52,204) in
2001, and other 189 nights (DJ 2,452,408 to 52,596) in
2002 the brightness of 32 different stars between
variable, suspected variable and comparison stars,
with telescopes of 30.2 and 20.3 cm, and CCD cameras,
from Spain.

We have light curves of brightness, periodogram and
measurements of L940 that characterize it as a new
variable star of Red Giante type.

Best regards fron Spain and HAPPY HOLIDAYS, FELICES
NAVIDADES.

Francisco A. Violat Bordonau




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Observatorio Astronomico de Caceres
Asociacion de Variabilistas de Espana
Asesores Astronomicos Cacerenos

Asesor Cientifico de InfoGLOBAL, S.A. (Madrid, Spain).

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