WALLABY Pre-pilot Survey: The Effects of Tidal Interaction on Radial Distribution of Color in Galaxies of the Eridanus Supergroup.
Wang et al. 2022. ApJ, DOI:10.3847/1538-4357/ac4270
The Westerbork Coma Survey. A blind, deep, high-resolution H I survey of the Coma cluster.
Molnár et al. 2022 A&A, DOI: 10.1051/0004-6361/202142614
Dpt. Astronomía Extragaláctica
Instituto Astrofísica Andalucía
Glorieta de la Astronomía s/n
18008 Granada
Spain
PositionsDuring preparatory work on the survey we searched for CIG positions in the SIMBAD database and noticed shifts with respect to the central positions of the galaxies, reaching in some cases up to several tens of arcseconds. This fact not only prevents accurate pointings for reduced fields of view, but also makes cross-identifications with other available catalogs more diffiult. We then searched the Updated Zwicky Catalogue (UZC; Falco et al. 1999) whose accuracy peaks at 1" with a width of 1".45, as estimated after matching with the FIRST 1.4 GHz catalog (White et al. 1997). Still in a preliminary exploration mode we found CIGs with positional errors larger than 10" in the UZC. This motivated us to revise the positions of the entire CIG in a systematic way. We decided to provide positions for the entire catalog without consideration of any isolation criterion.
Method
Taking into account the internal error from SExtractor and the error from astrometry, these new positions are correct within an error of ~0."5 for 90% of the CIG galaxies. For the rest of galaxies the errors are linked with late morphological types that required an interactive reprocessing of the data. The new positions are available in electronic form at the CDS or in our public database.
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