New variable star 11. 1902 Lyrae

Cygni , a second overtone field RR Lyrae star

We present the first (as of February, 1999) UBV and uvby photometric measurements for the short period variable star V2109 Cyg discovered by the Hipparcos satellite and classified as a field RRc variable. We have obtained new times of maxima and the period change has been studied. We determined the fundamental physical parameters using the geometric distance of the star and the most recent synt...

The Blazhko Effect of the RR Lyrae Star FM Persei

We have obtained 615 new V and R observations of the RR Lyrae star FM Per. A period search identified a primary period of 0.489256 days; however, the light curve of FM Per cannot be well described by a single period. We conclude that FM Per demonstrates the Blazhko effect with a Blazhko period of approximately 122 days.

The Macho Project Large Magellanic Cloud Variable Star Inventory. Xi. Frequency Analysis of the Fundamental Mode Rr Lyrae Stars

We have frequency analyzed 6391 variables classified earlier as fundamental mode RR Lyrae (RR0) stars in the macho database on the Large Magellanic Cloud (LMC). The overwhelming majority (i.e., 96%) of these variables have been proved to be indeed RR0 stars, whereas the remaining ones have fallen in one of the following categories: singleand double-mode Cepheids, binaries, first overtone and do...

Luminous Red Variable Star

We report photometry and spectroscopy of the evolution of Nova Sagittarii 1994 #1 (V4332 Sagittarii) during outburst. We compare the photometric and spectral evolution of this outburst to known classes of outbursts – including classical novae and outbursts occurring on symbiotic stars – and find this object does not conform to any known class of outburst. The closest match to the behavior of th...

Arne Tiselius, 1902-1971.