ZTF J191814.28+010850.2: An eclipsing cataclysmic-variable candidate in the SW Sextantis period range

@misc{bernhard2026j191814280108502,
  title = {{ZTF J191814.28+010850.2: An eclipsing cataclysmic-variable candidate in the SW Sextantis period range}},
  author = {Klaus Bernhard and Wolfgang Moschner and Christopher Lloyd and Peter Frank},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.05494},
  eprint = {2610.05494},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.05494},
}

TY  - UNPB
TI  - ZTF J191814.28+010850.2: An eclipsing cataclysmic-variable candidate in the SW Sextantis period range
AU  - Klaus Bernhard
AU  - Wolfgang Moschner
AU  - Christopher Lloyd
AU  - Peter Frank
PY  - 2026
DA  - 2026/10/04
PB  - arXiv
DO  - 10.48550/arxiv.2610.05494
UR  - https://arxiv.org/abs/2610.05494
AB  - We present a photometric study of ZTF J191814.28+010850.2, a short-period variable previously classified as an EA-type eclipsing binary. The analysis is based on ZTF observations in the g and r bands and additional time-series CCD photometry obtained on two nights. We derive an eclipse period of 0.1408529(3) d. The phased ZTF light curves show a deep primary eclipse, with an eclipse depth of about 2.8 mag in g and 2.0 mag in r, as well as indications of cycle-to-cycle variations outside eclipse. After excluding the primary eclipse and accounting for the remaining orbital modulation, robust locally weighted fits reveal a broad non-linear long-term brightness variation in both bands, with peak-to-peak ranges of about 0.56 mag in g and 0.46 mag in r. The deep eclipse, short orbital period and irregular variability suggest that the object is a cataclysmic-variable candidate and possibly a member of the SW Sextantis group. Time-resolved spectroscopy is required to confirm or refute the proposed classification and to test possible membership in the SW Sex class.
ER  -