Serbian-Bulgarian mini-network telescopes and Gaia-FUN-TO for the period 
2014-2017 
  
G. Damljanovic 1, S. Boeva 2, O. Vince 1, G. Latev 2, R. Bachev 2, 
M. D. Jovanovic 1, Z. cvetkovic 1 and R. Pavlovic 1

1 Astronomical Observatory, Volgina 7, Belgrade, Serbia
2 Institute of Astronomy with NAO, BAS, BG-1784, Sofia, Bulgaria
  
E-mail: gdamljanovic@aob.rs

Abstract. 
About 3000 Gaia Alerts were done by the Gaia Science Alerts group during 
the last three years (period October 2014 - October 2017). We have 
observed about 45 objects (near 1650 CCD images) of Gaia-FUN-TO for that 
period; it is about 15 objects (near 550 CCD images) per year. The 
standard Jhonson BV and Cousins RI filters were used, and bias, dark and 
flat-fielded corrections were applied (plus hot/dead pixels, shutter 
effect, etc.). The astrometry solution for individual data frames was 
done in Astrometry.Net (http://astrometry.net), and the Source Extractor 
was used for the aperture photometry measurements. Finally, the data were 
sent to the Cambridge Photometric Calibration Server (CPCS) for further 
callibration 
(http://www.ast.cam.ac.uk/ioa/wikis/gsawgwiki/index.php/Follow-up). At 
the end of 2014, the rare object Gaia14aae (GaiaVerif14acp), the deeply 
eclipsing AM CVn system, was actual and we did our efforts to observe it; 
as a result, the paper about it (Campbell et al. 2015) was published. In 
the last two years, another rare object, Gaia16aye - the binary 
microlensing event, was very interesting and we observed it many times. 
Also, other rare Objects (supernovae, cataclysmic variables, etc.) were 
observed. To do that, we have used 6 instruments via local cooperation 
"the Serbian-Bulgarian mini-network telescopes" (established in 2013) and 
SANU-BAN joint research project "Study of ICRF radio-sources and fast 
variable astronomical objects" for three-years period (2017-2019, the 
head is G. Damljanovic). In the last two years, the 60 cm Rozhen 
telescope (Bulgaria) has been under reconstruction, but there is a new 
one, the 1.4 m ASV (Serbia) from mid-2016 via Belissima project. The 
first data of the 1.4 m ASV are very good. Some results about the Gaia-
FUN-TO are presented, here.