The Star Formation Across Cosmic Time (SFACT) Survey. II. The First Catalog from a New Narrowband Survey for Emission-line Objects

Star Formation Across Cosmic Time (SFACT) is a new narrowband (NB) survey designed to detect faint emission-line galaxies (ELGs) and QSOs over a broad range of redshifts. Here we present the first list of SFACT candidates from our pilot-study fields. Using the WIYN 3.5 m telescope, we are able to achieve good image quality with excellent depth and routinely detect ELGs to r = 25.0. The limiting line flux of the survey is & SIM;1.0 x 10(-16) erg s(-1) cm(-2). SFACT targets three primary emission lines: H & alpha;, [O iii] & lambda;5007, and [O ii] & lambda;3727. The corresponding redshift windows allow for the detection of objects at z & SIM; 0-1. With a coverage of 1.50 deg(2) in our three pilot-study fields, a total of 533 SFACT candidates have been detected (355 candidates deg(-2)). We detail the process by which these candidates are selected in an efficient and primarily automated manner, then tabulate accurate coordinates, broadband photometry, and NB fluxes for each source.