Detecting strongly-lensed type Ia supernovae with LSST

Understand

Strongly-lensed supernovae are rare and valuable probes of cosmology and astrophysics.

• Upcoming wide-field time-domain surveys, such as the Vera C.
• Rubin Observatory's Legacy Survey of Space and Time (LSST), are expected to discover an order-of-magnitude more lensed supernovae than have previously been observed.
• In this work, we investigate the cosmological prospects of lensed type Ia supernovae (SNIa) in LSST by quantifying the expected annual number of detections, the impact of stellar microlensing, follow-up feasibility, and how to best separate lensed and unlensed SNIa.