ASASSN-16do confirmed as high inclination, low mass ratio CV
ATel #8987; Christopher Britt (TTU), Thomas Maccarone (TTU), Jay Strader (MSU), Laura Chomiuk (MSU)
on 26 Apr 2016; 19:17 UT
Credential Certification: Christopher Britt (chrisbritt86@gmail.com)
Subjects: Ultra-Violet, X-ray, Cataclysmic Variable, Transient
After a very broad, double peaked H alpha line of this object first reported in ATEL #8888 was detected in ATEL #8969, we measured the separation between the peaks in light of the new relation DP/FWHM to mass ratio q (Casares, 2016) where DP is the separation between the peaks. We found that DP/FWHM=0.58 in the SOAR spectrum.
ASASSN-16do was observed with SWIFT on April 23rd, 2016 at 11:32:27 UT for 2995s. The observation ID is 35403. The source is visible in the X-ray with 11 counts above background. It is also visible in the UVW2 filter at magnitude 12.2. The ratio of UV to X-ray flux is ~100, which confirms the CV nature of the target.
Using the relation for mass ratio of CVs found in Casares (2016), DP/FWHM=0.58 corresponds to a mass ratio of q=0.2(+/-0.1).
Object | RA (J2000) | DEC (J2000) | UT Date | UVW2 mag | FX(cgs) | DP/FWHM
ASASSN-16do | 06:34:12.76 | -32:59:49.71 | 2016-04-23.48087 | 12.2 | 1.5e-13 | 0.58
