X Serpentis (NB+UGSS)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=34598
The galactic classical nova X Ser is currently undergoing a dwarf nova outburst, as indicated by recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) observations:
https://asas-sn.osu.edu/light_curves/62dd206e-8390-4979-9ead-fd1c112254…
ZTF light curve: https://lasair.roe.ac.uk/object/ZTF18adbafew/
The previous (dwarf nova) outburst occurred from 2019 April 29 until June 1.
Spectroscopy is encouraged.
Clear skies,
Patrick