http://arxiv.org/abs/2204.12984
Cross-referencing a watchlist of galaxy groups and clusters with transient detections from real-time streams of wide-field survey data is a promising method for discovering gravitationally lensed explosive transients including supernovae, kilonovae, gravitational waves and gamma-ray bursts in the next ten years. However, currently there exists no catalogue of lenses with both sufficient angular extent and depth to adequately perform such a search. In this study, we develop a method capable of creating an all-sky list of galaxy group- and cluster-scale objects out to $z\simeq1$ based on their lens-plane properties and using only existing data from wide-field infrared surveys. Importantly, the data exists ready to implement our methods in advance of when the Vera Rubin Observatory’s (Rubin’s) Legacy Survey of Space and Time (LSST) commences survey operations. In testing this method, we recover 91 per cent of a sample containing known and candidate lensing objects with Einstein radii of $\theta_E \geq 5\arcsec$. We also search the surrounding regions of this test sample for other groups and clusters using our method and verify the existence of any significant findings by visual inspection, deriving estimates of the false positive rate that are as low as 6 per cent. The method is also tested on simulated Rubin data from their DP0 programme, which yields complementary results of a good recovery rate and low false positives.
D. Ryczanowski, G. Smith, M. Bianconi, et. al.
Thu, 28 Apr 22
13/70
Comments: 10 pages, 9 figures. Submitted to MNRAS