AAVSO Observer Code
American Association of Variable Star Observers (AAVSO)
Full Name
Velimir Popov
Sofia, BG
Background/Interesting Fact
PhD candidate in Astrophysics - Shumen University, Bulgaria. Other background: eclipsing binary stars, cataclysmic variable stars, exoplanets, photometry, astrophotography, spectroscopy.

Remotely controlled IRIDA Observatory, Long: E 24:44:19, Lat: N 41:41:51, alt: 1750 m).

IRIDA South (3 m dome):
- Telescope: TS-Optics Ritchey-Chretien RC16 Pro, D = 406 mm (16”), f/8;
- CMOS camera: MORAVIAN C4-16000 cooled scientific CMOS, active size 4096 x 4096 px, pixel size 9 μm, sensor diagonal: 52.1 mm, gain = 0.82 e-/ADU;
- Working configurations: f/8, FOV = 38 х 38 arcmin, effective FL=3 248 mm, image scale = 0.57 arcsec/px;
- Filters 50x50 mm square: g’, r’, i’ (SLOAN type), B, V, R, (Bessel), and Luminance (clear UV-IR cut);
- Mount: ASA - DDM85 Premium Direct Drive Mount -100 kg payload, 24V DC;
- Dome – 3m ScopeDome;
- Remote control.

IRIDA North (3 m dome):
12” ASA N12 Astrograph, CCD SBIG STL-11000M, r', i', Ha (7 nm), OIII (8.5 nm), Rcont (red continuum), G (green), B (blue), L (clear), ASA DDM85 mount.
Website URL
CHOICE Courses Completed
How to use VPhot 2014-04-16
Variable Star Classification and Light Curves 2014-10-15
How to use VSTAR 2014-12-15