UBV photometry of Be stars at Hvar: 1972--1990

Details UBV photometry of Be stars at Hvar: 1972--1990 UBV photometry of Be stars at Hvar: 1972--1990

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..125...75p&link_type=abstract

A & A Supplement series, Vol. 125, October 1997, 75-98.

Astronomy and Astrophysics

Astronomy

57

Stars: Be, Stars: Omicron Cas, Qr Val, Stars: Variable

Scientific paper

A summary of results of the systematic UBV photoelectric monitoring of bright northern Be stars carried out at the Hvar Observatory between 1972 and 1990 is presented. Altogether, 76 Be stars of all luminosity classes were observed and 13,848 UBV measurements secured. Simultaneously, 9,648 UBV measurements of 48 check stars (most of them of early spectral types) were obtained. A careful transformation of all observations into the standard Johnson system allowed detection and monitoring of even very mild long-term light and colour variations of these objects. Almost all early-type Be stars in the sample turned out to be variable. For several stars phase-locked light variations related to their binary nature were established. Sudden brightenings, on a time scale of a few days, were detected for o Cas and QR Vul. Tables 2 and 3 are only available in electronic form at CDS via ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http: //cdsweb.u-strasbg.fr/Abstract.html

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