Search

Correction to: Astrophys Space Sci10.1007/s10509-019-3522-3 We would like to add the following sentence into the acknowledgement: Students of Horten Upper Secondary School (Horten Videregående Skole) B. Berg, Å. Hansli, V.H. Hatlo, M.B. Hjelmervik, C.T. Lavre, V. Moskvil, and V. Skui are acknowledged for taking part in observing eclipsing binary candidate TYC 2764-1997-1 star on the Nordic Optical Telescope. [ABSTRACT FROM AUTHOR]

As extensive ground-based observations and characterisation of different variable stars are of the utmost importance in preparing optimal input catalogues for space missions, our aim was to search for new variable stars in selected fields of the northern sky. We obtained 24 470 CCD images and analysed photometric time series of stars using the DAOPHOT based package Muniwin as the first step, and the Period04 package was used to further analyse the suspected new variable stars. The light curves and other observational results are presented for 3598 stars online. We found 81 new variable stars, among them is an eclipsing binary with a variable component and possibly eccentric orbits TYC4038-693-1 which we also observed spectroscopically, four δ Scuti candidates, six other variable stars with periods falling into the interval of 35 minutes to 20 days. Furthermore, we identified 70 slowly varying stars with so far undefined periodicity. Additional photometric and spectral observations were carried out for TYC2764-1997-1, and its previous candidacy for eclipsing binaries was approved. [ABSTRACT FROM AUTHOR]