Open AccessSeeing-sorted Visible Multi-Object Spectrograph U-band Imaging of the GOODS-south Field*
Author(s) -
Lillian Otteson,
Tyler McCabe,
Teresa Ashcraft,
Rogier A. Windhorst,
Rolf A. Jansen,
Seth H. Cohen,
M. ino,
D. Paris,
A. Grazian,
A. Fontana,
E. Giallongo,
R. Speziali,
V. Testa,
K. Boutsia,
Anton M. Koekemoer,
R. W. O’Connell,
Michael J. Rutkowski,
Russell E. Ryan,
Claudia Scarlata,
Harry I. Teplitz
Publication year - 2021
Publication title -
research notes of the aas
Language(s) - English
Resource type - Journals
ISSN - 2515-5172
DOI - 10.3847/2515-5172/ac1db6
Subject(s) - spectrograph , full width at half maximum , observatory , telescope , remote sensing , physics , optics , field of view , geology , astronomy , spectral line
We present the optimal resolution and optimal depth U -filter mosaics using the seeing-sorted method of Ashcraft et al. on deep, ground-based U -bandimaging of the Great Observatories Origins Deep Survey South field as part of the near-UV imaging program UVCANDELS. We use the U -bandimages obtained with the VIsible Multi-Object Spectrograph on the European Southern Observatory Very Large Telescope by Nonino et al. Our best resolution mosaic includes images with a seeing full-width half maximum (FWHM) ≤ 0.″8, and encompasses 50% of the data. Our best depth mosaic includes images with FWHM ≤ 1.″5, corresponding to 100% of the data. Prior to being combined, the source fluxes in each individual background-subtracted image are corrected to match a 3D-HST photometric catalog of the same field to correct variations in the U -band zero-points. These mosaics provide deep U -banddata complementary to the UVCANDELS HST WFC3 F275W and ACS F435W images. We assess the depth of both U -bandmosaics.