Search Publications

Variability of L261 in M13

Violat-Bordonau, F.

After the discovery in April 2021 of the variability of the star L199 (now V63), belonging to the globular cluster Messier 13 (NGC 6205), between June and October 2021, we have studied twenty of the brightest stars, excluding the well-known red giant variables: surprisingly a good part of them shows some degree of variability in the range 0.05-0.2…

New Semiregular Variable Star Near The Wizard Nebula - Evolution of the Red Giant MACOMP_V1

Moriconi, M.; Conzo, G.; Marotta, P. G.

The red giant MaCoMP_V1 in Cepheus at coordinates RA (J2000) 22:49:05:49 and DEC (J2000) +57:52:41:6 is a semiregular variable star classified as SRS, number 2225960 in the AAVSO VSX database. Using the Fourier transform, the period P = 24.751(0.062)d was evaluated and, with the support of the ASAS-SN and ZTF surveys, a well-defined light curve wa…

Period Changes of Mira Variables in the M16 - M17 Region

Nesci, R.; Tuvikene, T.; Soszynski, I.

We analyzed the light curves of 165 AGB variables, mostly Miras, in the sky area centered between M16 and M17 (l = 16, b = 0), using the OGLE GVS database in the Ic band. Comparison with the published light curves, derived about 50 years earlier by P. Maffei using Kodak I-N photographic plates, allowed us to find no significant period changes in a…

Five New faint cataclysmic variables from the Zwicky Transient Facility

Bernhard, K.; Lloyd, Ch.

A search of faint, large-amplitude variables in the Zwicky Transient Facility datahas led to the identification of five new CVs. Four of the stars, ZTFJ010013.34+610809.8, ZTFJ051913.86+293006.0, ZTFJ210441.02+394052.7 and ZTFJ210705.14+394617.7 are probably SS Cyg-type systems, while ZTFJ173854.93+175136.3 is a likely SU UMa system.