author = "Oliveira, Alexandre S. and Rodrigues, Cl{\'a}udia Vilega and 
                         Cieslinski, Deonisio and Jablonski, Francisco Jos{\'e} and Silva, 
                         K. M. G. and Almeida, L. A. and Rodrigues-Ardila, A. and Palhares, 
                         M. S.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Gemini Observatory} and {Universidade de 
                         S{\~a}o Paulo (USP)} and {Laborat{\'o}rio Nacional de 
                         Astrof{\'{\i}}sica (LNA)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)}",
                title = "Exploratory spectroscopy of magnetic cataclysmic variables 
                         candidates and other variable objects",
              journal = "Astronomical Journal",
                 year = "2017",
               volume = "153",
               number = "4",
                month = "Apr.",
             keywords = "binaries: close, novae, cataclysmic variables, stars: dwarf novae, 
                         stars: variables: general, techniques: spectroscopic.",
             abstract = "The increasing number of synoptic surveys made by small robotic 
                         telescopes, such as the photometric Catalina Real-Time Transient 
                         Survey (CRTS), provides a unique opportunity to discover variable 
                         sources and improves the statistical samples of such classes of 
                         objects. Our goal is the discovery of magnetic Cataclysmic 
                         Variables (mCVs). These are rare objects that probe interesting 
                         accretion scenarios controlled by the white-dwarf magnetic field. 
                         In particular, improved statistics of mCVs would help to address 
                         open questions on their formation and evolution. We performed an 
                         optical spectroscopy survey to search for signatures of magnetic 
                         accretion in 45 variable objects selected mostly from the CRTS. In 
                         this sample, we found 32 CVs, 22 being mCV candidates, 13 of which 
                         were previously unreported as such. If the proposed 
                         classifications are confirmed, it would represent an increase of 
                         4% in the number of known polars and 12% in the number of known 
                         IPs. A fraction of our initial sample was classified as 
                         extragalactic sources or other types of variable stars by the 
                         inspection of the identification spectra. Despite the inherent 
                         complexity in identifying a source as an mCV, variability-based 
                         selection, followed by spectroscopic snapshot observations, has 
                         proved to be an efficient strategy for their discoveries, being a 
                         relatively inexpensive approach in terms of telescope time.",
                  doi = "10.3847/1538-3881/aa610d",
                  url = "http://dx.doi.org/10.3847/1538-3881/aa610d",
                 issn = "0004-6256",
             language = "en",
           targetfile = "oliveira_exploratory.pdf",
        urlaccessdate = "28 nov. 2020"