THE SOLAR NEIGHBORHOOD. XXIII. CCD PHOTOMETRIC DISTANCE ESTIMATES OF SCR TARGETS—77 M DWARF SYSTEMS WITHIN 25 pc

We present CCD photometric distance estimates of 100 SCR (SuperCOSMOS RECONS) systems with μ ⩾ 0 18 yr −1 , 29 of which are new discoveries previously unpublished in this series of papers. These distances are estimated using a combination of new VRI photometry acquired at CTIO and JHK magnitudes extracted from 2MASS. The estimates are improvements over those determined using photographic plate BRI magnitudes from SuperCOSMOS plus JHK , as presented in the original discovery papers. In total, 77 of the 100 systems investigated are predicted to be within 25 pc. If all 77 systems are confirmed to have π trig ⩾ 40 mas, this sample would represent a 23% increase in M dwarf systems nearer than 25 pc in the southern sky.