Photometric variability of the nova-like object V380 Oph in 1976-2016
Abstract
We combined photographic, photoelectric and CCD observations of the nova-like variable V380 Oph to get a light curve spanning the time range of 40 years. While the typical high-state brightness of V380 Oph was R~14.5, two low-brightness episodes identified in 1979 (B_pg~17.5) and 2015 (R~19) confirm its classification as a VY Scl-type "anti-dwarf nova". The Fourier period analysis of photoelectric and CCD V and B observations obtained in 2002-16 revealed the presence of two periods 0.148167d and 4.287d, that may be associated with negative superhumps and disc precession. We also compared measurements obtained with the iris micro-photometer and flatbed scanner at the same plates and found an agreement within the expected accuracy of photographic photometry.
Keywords
Cite
@article{arxiv.1605.01162,
title = {Photometric variability of the nova-like object V380 Oph in 1976-2016},
author = {S. Shugarov and P. Golysheva and K. Sokolovsky and D. Chochol},
journal= {arXiv preprint arXiv:1605.01162},
year = {2016}
}
Comments
4 pages, 3 figures, in proceedings of the AstroPlate workshop, Prague, Villa Lanna, March 14-18, 2016