Mini-survey of the northern sky to Dec <+30
P. Capak, D. Sconlic, J-C. Cuillandre, F. Castander, A. Bolton, R., Bowler, C. Chang, A. Dey, T. Eifler, D. Eisenstein, C. Grillmair, P. Gris, N., Hernitschek, I. Hook, C. Hirata, B. Jain K. Kuijken, M. Lochner, J. Newman,, P. Oesch, K. Olsen, J. Rhodes, B. Robertson, D. Rubin

TL;DR
This paper proposes extending the LSST survey to cover the northern sky up to DEC < +30, significantly increasing sky coverage and enabling diverse scientific investigations with minimal additional survey time.
Contribution
It introduces a unified plan for northern sky coverage extension of LSST, enhancing scientific capabilities and synergies with other major surveys and facilities.
Findings
Increases LSST sky coverage by 50%, adding ~9,600 square degrees.
Enables follow-up of multi-messenger transients and discovery of high-redshift quasars.
Requires only 0.6-2.5% of LSST survey time depending on synergies.
Abstract
We propose an extension of the LSST survey to cover the northern sky to DEC < +30 (accessible at airmass <1.8). This survey will increase the LSST sky coverage by ~9,600 square degrees from 18,900 to 28,500 square degrees (a 50% increase) but use only 0.6-2.5% of the time depending on the synergies with other surveys. This increased area addresses a wide range of science cases that enhance all of the primary LSST science goals by significant amounts. The science enabled includes: increasing the area of the sky accessible for follow-up of multi-messenger transients including gravitational waves, mapping the milky way halo and halo dwarfs including discovery of RR Lyrae stars in the outer galactic halo, discovery of z>7 quasars in combination Euclid, enabling a second generation DESI and other spectroscopic surveys, and enhancing all areas of science by improving synergies with Euclid,…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · Gamma-ray bursts and supernovae
