Poster Presentation

PFS Observatory filler program: target selection and quality of ~60,000 1D+2D pipeline processed galaxy, QSO and stellar spectra taken during the S25A observing runs

Author(s): Sadman Ali Masayuki Tanaka

Presenter: Sadman Ali (NAOJ (Subaru Telescope))

This talk will provide an overview of the PFS observatory filler program and data processing (with Tanaka et al.'s presentation detailing specific science cases). Since the launch of PFS, three observing runs have been undertaken thus far this semester. As part of the observatory filler program, targets have been selected from the PanStarrs1 survey that are uniformly distributed across the sky, reaching an i-band limiting magnitude of 21 and a S/N>3 in i-band Kron flux in the Forced-Mean photometry, such that fibers not in use during queue observations can target filler objects, irrespective sky pointing position. During run 21 (in March), we observed a total of 20,622 objects – 12202 galaxies, 8182 stars and 238 QSOs, with an average exposure time per object in the 2D pipeline processed, co-added spectrum of 2.6 hours (with a maximum of 12.4 hours for a subset of spectra). The 1D pipeline processing shows a redshift success rate for galaxies and QSOs of ~97% when compared to available DESI redshifts. Run 22+23 have similar number of observed targets – data will be available through the science platform shortly.

In this presentation I will highlight the statistics and target selection of the observatory fillers, show the quality of the fully 2D pipeline processed spectra and the 1D pipeline measurements of redshifts/line fluxes. By the end of PFS's first year of operation, we hope to have spectra of >100,000 objects as part of the filler program, providing a robust catalog of galaxies/stars/QSOs for a variety of science cases.