ASASSN-23ht: A Deep Eclipse Event
ATel #16328; A. M. Miller, K. Z. Stanek, D. M. Rowan, C. S. Kochanek, S. A. Petz, T. A. Thompson (OSU), B. J. Shappee (Univ. of Hawaii), J. L. Prieto (Diego Portales; MAS), Subo Dong (KIAA-PKU), M. Stritzinger (Aarhus)
on 7 Nov 2023; 21:24 UT
Credential Certification: Krzysztof Stanek (stanek.32@osu.edu)
Subjects: Optical, Variables
During the ongoing All-Sky Automated Survey for SuperNovae (ASAS-SN, Shappee et al. 2014, Kochanek et al. 2017), using data from the quadruple 14-cm ``Cassius,'' ``Payne-Gaposchkin,'' ``Leavitt,'' ``Bohdan,'' and ``Paczynski'' telescopes, we identified a stellar source undergoing a deep eclipse. ASASSN-23ht (Pan-STARRS PS1 source 83981131421254030 at RA=07:32:34.10953440, DEC=-20:00:48.9130920, g=14.5 mag, Gaia DR3 source 5716476783788937216 at d~3.1 kpc, MG~-0.3) was first observed by ASAS-SN on UT 2014-12-16. Presently, ASASSN-23ht has more than ~10,100 data points.
ASASSN-23ht has a quiescent mean magnitude of g~14.6 (V~14.3). The latest ASAS-SN photometry shows that ASASSN-23ht started to dim around UT 2023-09-29. As of UT 2023-11-06 ASASSN-23ht has faded to g~15.8. In the full ASAS-SN light curve, we observe no previous dimming events of this magnitude.
We thank Las Cumbres Observatory and its staff for their continued support of ASAS-SN. ASAS-SN operations are funded in part by the Gordon and Betty Moore Foundation through grants GBMF5490 and GBMF10501 to the Ohio State University, and Alfred P. Sloan Foundation grant G-2021-14192.
