General information
AT2026oyp, also designated ASASSN-26dt, is reported as a nova with an archival Swift/UVOT pre-outburst observation. The circular states that the nova peaked at g=10.5 mag on 2026 June 11.
Wavelength coverage
- UV: Swift/UVOT observed the source in the UVW1 filter on 2017-11-14 for 54 s, before the reported eruption; the quiescent magnitude was UVW1 = 19.56 ± 0.26 stat ± 0.03 sys AB mag.
- Optical: The nova was reported to have peaked at g=10.5 mag on 2026 June 11.
No observations are mentioned in X-ray, gamma-ray, radio, infrared, gravitational-wave, or neutrino bands.
Lightcurve and spectrum
- Pre-outburst UVW1 quiescent magnitude: 19.56 ± 0.26 stat ± 0.03 sys AB mag.
- Reported optical peak: g=10.5 mag on 2026 June 11.
Redshift
What’s special vs typical