VizieR Online Data Catalog: Solar neighborhood XXXVIII. Nearby M dwarf systems (Winters+, 2017)

Stars reported here were targeted during the astrometry program because they were likely to be red dwarfs within 25pc with no previous published π_trig. Of the 151 systems, 93 are from previous compendia of proper motion stars, primarily based on work by Luyten (Luyten 1979nlcs.book.....L, 1980nltt.bookQ....L), and 58 are from our SuperCOSMOS-RECONS (SCR) search (Hambly et al. 2004AJ....128..437H; Henry et al. 2004AJ....128.2460H). The systems have μ=118-828mas/yr, with 143 having μ>180mas/yr, the canonical cutoff for Luyten's Two-Tenths (LTT) Catalog.

For all but two objects (only one epoch of photometry was available for WT 1637 and LHS 2024 at the time of the paper), at least two epochs of absolute V_JR_KCI_KC photometry on the Johnson-Kron-Cousins system were measured for each parallax field. Two V filters that are photometrically indistinguishable to 7 millimagnitudes (mmag) (Jao et al. 2011AJ....141..117J), one R filter, and one I filter were used for series of observations spanning 2-16years, depending on the star (the central wavelengths for the two V_J filters, the R_KC filter, and the I_KC filter are 5438Å, 5475Å, 6425Å, and 8075Å, respectively). The 2048*2046 Tektronix CCD camera on the CTIO/SMARTS 0.9m with a pixel (px) scale of 0.401''/px was used for both astrometric and photometric observations. In order to mitigate the effects of image distortion at the edges of the CCD, only the central quarter of the chip was used, resulting in a 6.8*6.8 square field of view.

Photometry in the near-infrared JHK_s filters has been extracted from the Two Micron All Sky Survey (2MASS; Cutri et al. 2003, Cat. II/246) and is rounded to the nearest hundredth magnitude in Table1.

(5 data files).