VizieR Online Data Catalog: Stroemgren photometry in the field of NGC 1978 (Piatti+, 2019)
Abstract
We downloaded publicly available Stroemgren vby images from the National Optical Astronomy Observatory (NOAO) Science Data Management (SDM) Archives (http//www.noao.edu/sdm/archives.php). They were obtained, along with suitable calibration and standard field images, as part of an observational program aiming at studying the chemical evolution of the LMC from clusters and field stars (program ID: SO2008B-0917, PI: Pietrzynski). The images were obtained on the night of 2008 January 18 with the SOAR Optical Imager (SOI) mounted on the 4.1 m Southern Astrophysical Research (SOAR) telescope (FOV=5.25'x5.25', scale=0.154"/px), and are of excellent quality (typical FWHM~0.6"). They consist of one exposure of 350, 140, and 90 s in the v, b, and y filters, respectively. We obtained instrumental vby magnitudes of stars located in the field of NGC 1978 using the stand-alone versions of DAOPHOT, ALLSTAR, DAOMATCH, and DAOMASTER routine packages (Stetson et al. 1990ASPC....8..289S). The magnitudes were derived from point-spread function (PSF) fits performed using previously generated spatially quadratically varying PSFs.
(1 data file).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- July 2019
- DOI:
- 10.26093/cds/vizier.51570049
- Bibcode:
- 2019yCat..51570049P
- Keywords:
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- Magellanic Clouds;
- Clusters: globular;
- Stars: giant;
- Photometry: uvby