Back to Volume
Paper: On-the-fly Catalogs for Time-Domain Surveys
Volume: 485, Astronomical Data Analysis Software and Systems XXIII
Page: 207
Authors: Budavári, T.; Szalay, A. S.
Abstract: The next-generation repeatedly covering the accessible sky many times require new observational strategies. Individual exposures are noisy, which is why the images are traditionally coadded to obtain deeper and the pipelines perform forced photometry to establish the lightcurves. Here we explore an alternative online solution where the catalogs are extracted for each individual observation with a low threshold well under the noise level and the false detections are weeded out incrementally. We find that the probability of detecting real objects is comparable in the coadds and our statistical methodology. Using a Bayesian approach we distinguishing between noise peaks and true objects based on the measured fluxes and optionally their celestial coordinates. The performance is demonstrated on simulations that mimic the characteristics of the Large Synoptic Survey Telescope.
Back to Volume