# Large Synoptic Survey Telescope White Paper; The Case for Matching U-band on Deep Drilling Fields

## TL;DR

This paper advocates for dedicated U-band observations in LSST's deep drilling fields to maximize scientific returns, especially in conjunction with upcoming radio surveys like MeerKAT.

## Contribution

It proposes a focused U-band survey strategy for LSST's deep fields, emphasizing enhanced scientific synergy with radio observations.

## Key findings

- Deep U-band coverage increases scientific yield.
- Aligning LSST with MeerKAT enhances multi-wavelength studies.
- Optimized cadence improves data quality for deep fields.

## Abstract

U-band observations with the LSST have yet to be fully optimized in cadence. The straw man survey design is a simple coverage of the medium-deep-fast survey. Here we argue that deep coverage of the four deep drilling fields (XMM-LSS, ECDFS, ELAIS-S1 and COSMOS) has a much higher scientific return, given that these are also the target of the Southern Hemisphere's Square Kilometer Array Pathfinder, the MeerKAT specifically, deep radio observations.