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Late superhumps and the stream-disc impact in IY UMa
We use the hotspot eclipse times of the newly discovered deeplyeclipsing dwarf nova IY UMa to trace out the shape of its disc duringthe late superhump era. We find an eccentric disc. We show that thebrightness of the stream-disc impact region varies as expected with|?V|2, where ?V is the relative velocity of thestream with respect to the velocity of the disc at the impact point. Weconclude that the hotspot is the source of late superhump light.
| A revised catalogue of delta Sct stars
An extensive and up-dated list of delta Sct stars is presented here.More than 500 papers, published during the last few years, have beenrevised and 341 new variables have been added to our last list, sixyears ago. This catalogue is intended to be a comprehensive review onthe observational characteristics of all the delta Sct stars known untilnow, including stars contained in earlier catalogues together with othernew discovered variables, covering information published until January2000. In summary, 636 variables, 1149 references and 182 individualnotes are presented in this new list. Tables 1 and 2 will be accessibleonly in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/Abstract.html
| New uvbybeta photometry of stars of ``astrophysical interest''
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| A catalogue of variable stars in the lower instability strip.
Identifications, positions, photometry, spectra, some pulsationalfeatures, other astrophysical parameters and literature for 302pulsating variable stars in the lower instability strip, near the ZAMS,are given. About 185 stars have near homogeneous photometric informationin the Stroemgren's uvby-β photometric system. Thiscatalogue/database covers information published until November 1993.
| δ Scuti stars: a new revised list
An extensive and up to date list of δ Sct stars is presented. Thiscatalogue is intended to be a comprehensive review of observationalcharacteristics of all the δ Sct stars known until now, includingstars contained in earlier catalogues together with other new discoveredvariables, covering information published until November 1993. Globalinformation in the form of histograms and diagrams are also shown.
| The 71st Name-List of Variable Stars
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| HD 59594 - A new Delta Scuti variable star
Photoelectric observations of HD 59594 are reported. It is shown thatthe star is a Delta Scuti variable with at least two short-periodcomponents present in its light variation. Periods and amplitudes of thetwo strongest components are derived.
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