Archival OGLE Observations Reveal Orbital Period of Gaia21avt (AT2021ddo)
ATel #14410; P. Mroz (Caltech), A. Udalski (Warsaw U.), on behalf of the OGLE team
on 19 Feb 2021; 16:08 UT
Credential Certification: Przemek Mroz (pmroz@astrouw.edu.pl)
Subjects: Optical, Cataclysmic Variable, Nova, Transient
Hodgkin et al. (ATel #14402) reported the discovery of a probable Galactic nova by the Gaia Alerts system. This object is located in the field that has been regularly observed by the OGLE survey since 2010. The position of the transient is consistent with that of a faint star (I = 21.32 +/- 0.03 mag) listed as BLG611.07.120340 in the OGLE database.
The archival OGLE light curve of the source reveals eclipsing variability with a period of 0.9400430 +/- 0.000027 d. If the object is confirmed as a classical nova, this indicates that the system harbors an evolved secondary star, likely a subgiant (e.g., Darnley et al. 2012).
OGLE Real Time Monitoring of Cataclysmic Variables
