Serbian - Bulgarian mini-network telescopes: First simultaneous observations of variable objects S. Boeva G. Damljanović B. Petrov B. Spasov M. Sekulić.

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Serbian - Bulgarian mini-network telescopes: First simultaneous observations of variable objects S. Boeva G. Damljanović B. Petrov B. Spasov M. Sekulić G.Latev

Observatories

Telescopes 60 cm Vidojevica 50/70 Shmidt Rozhen 60 cm Belogradchik 2m Rozhen

Intention for simultaneous observations: 1. Need of 5-band photometry for our research of fast flux changes of cataclysmic and symbiotic variables (or other objects). 2. Time resolution of CCD frames. 3. Avoiding accidental local and instrumental errors.

Amplitude – average flux relation for 9 cataclysmic and symbiotic stars (From Zamanov et al., MNRAS, 457, 2016)

Temperature of flickering source V 425 Cas

UBVRI light curves of V425 Cas from 08.12.2015 and 09.12.2015

UBVRI light curves of V794 Aql 08.12.2015

The first Bulgarian – Serbian “synchron”: HZ Her 23.06.2015

Congratulations to the Serbian colleagues for the new 1. 4 m telescope Congratulations to the Serbian colleagues for the new 1.4 m telescope! Thank you for attention!