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For refcode 2007ApJS..172..599S:
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2007ApJS..172..599S SFI++. II. A New I-Band Tully-Fisher Catalog, Derivation of Peculiar Velocities, and Data Set Properties Christopher M. Springob, Karen L. Masters, Martha P. Haynes, Riccardo Giovanelli, and Christian Marinoni Abstract. We present the SFI++ data set, a homogeneously derived catalog of photometric and rotational properties and the Tully-Fisher distances and peculiar velocities derived from them. We make use of digital optical images, optical long-slit spectra, and global H I line profiles to extract parameters of relevance to disk scaling relations, incorporating several previously published data sets as well as a new photometric sample of some 2000 objects. According to the completeness of available redshift samples over the sky area, we exploit both a modified percolation algorithm and the Voronoi-Delaunay method to assign individual galaxies to groups as well as clusters, thereby reducing scatter introduced by local orbital motions. We also provide corrections to the peculiar velocities for both homogeneous and inhomogeneous Malmquist bias, making use of the 2MASS Redshift Survey density field to approximate large-scale structure. We summarize the sample selection criteria, corrections made to raw observational parameters, the grouping techniques, and our procedure for deriving peculiar velocities. The final SFI++ peculiar velocity catalog of 4861 field and cluster galaxies is large enough to permit the study not just of the global statistics of large-scale flows but also of the details of the local velocity field. Key words: Astronomical Data Bases: Miscellaneous, Galaxies: Distances and Redshifts, Galaxies: Fundamental Parameters, Cosmology: Large-Scale Structure of Universe =========================================================================== 2009ApJS..182..474S Erratum: "SFI++ II: A New I-Band Tully-Fisher Catalog, Derivation of Peculiar Velocities and Data Set Properties" (2007, ApJS, 172, 599) Springob, Christopher M.; Masters, Karen L.; Haynes, Martha P.; Giovanelli, Riccardo; Marinoni, Christian Abstract. We were alerted by various investigators (Luis Varga, Hume Feldman, Azalee Bostroem, and Caihong Wang) that the morphological-type correction for the peculiar velocity calculation was not properly applied in the published tables. We have investigated this, and discovered that both the corrected magnitude and peculiar velocities for galaxies with a morphological-type correction (those of type Sb and earlier) were erroneously reported in our tables. The actual calculation of morphological corrections for the construction of the template in Masters et al. (2006) was done correctly, but the processing of parameters into data tables done for this paper included an error in this correction. This error only directly affects the peculiar velocity calculations of the galaxies of type Sb and earlier. However, it indirectly affects the peculiar velocity calculations of the later type galaxies in that the Malmquist bias correction depends on the overall magnitude distribution of the sample. With a slightly different magnitude distribution, the Malmquist bias correction will be slightly different as well. Thus, after fixing the corrected magnitudes, we redid the Malmquist bias correction, and so the later type galaxies also have slightly revised Malmquist bias corrected distances and peculiar velocities now. We were separately alerted by Azalee Bostroem that the correction for standardizing optical rotation curve (ORC) widths to HI widths was incorrectly applied in the template cluster table. Again, the correction was applied correctly in the actual derivation of the template relation, so the peculiar velocities are unaffected by this. However, incorrect values were included in Table 4 for the galaxies with ORC widths. We therefore present revised versions of Tables 2, 3, and 4 in the online version of the journal for which these errors have been corrected. These should replace the originally published tables. Most of the published parameters remain unchanged.The parameters that have been updated are as follows {see text} =============================================================================
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