Search Publications
A Search for the O'Connell Effect in Contact Binaries in the Era of Big Sky Surveys. I.
Christopoulou, Panagiota-Eleftheria; Papageorgiou, Athanasios; Kleftogiannis, Georgios D.
Asymmetries between the two maxima of the light curves of contact binaries, known as the O'Connell effect, have been identified using the All Sky Automated Survey, All-Sky Automated Survey for Supernovae, Northern Sky Variability Survey, Optical Gravitational Lensing Experiment, and Optical Monitoring Camera sky surveys. The morphology of the mean…
A New X-Ray and Radio Burst Activity from the Magnetar SGR 1935+2154
Ibrahim, Alaa I.; Rehan, Noor S.
SGR 1935+2154 has emerged as the most active magnetar in recent years, exhibiting X-ray burst activity nearly annually and emitting a fast radio burst (FRB 200428 (FRB1)) in its 2020 April activity, for the first time from a Milky Way source, accompanied by an X-ray burst (XFRB1). The source was active again in 2021 September and 2022 J…