AT2026nik

General information

AT2026nik was observed with the Einstein Probe Follow-up X-ray Telescope (FXT), yielding an X-ray source consistent with the transient position and supporting an LFBOT classification.

Wavelength coverage

• X-ray: EP-FXT detection reported (stacked Modules A and B), with an absorbed flux estimate.
• Optical: Blue, nearly featureless optical spectrum reported (via referenced AstroNotes). No UV, IR, radio, or gamma-ray observations are mentioned in the provided circular text.

Lightcurve and spectrum

Redshift

A tentative redshift of z = 0.182 is reported based on a tentative detection of the interstellar Mg II absorption doublet.

What’s special vs typical

The circular argues the optical spectrum plus newly detected X-ray counterpart are consistent with a luminous fast blue optical transient (LFBOT), with an inferred X-ray luminosity stated to be comparable to AT2018cow-like events at a similar epoch.