SIMP: A Near-Infrared Proper Motion Survey

Details SIMP: A Near-Infrared Proper Motion Survey SIMP: A Near-Infrared Proper Motion Survey

2008-09-25

arxiv.org/abs/0809.4497v1

Astronomy and Astrophysics

Astrophysics

Proceedings article of the conference 'Cool Stars 15' held July 2008 in St. Andrews

Scientific paper

10.1063/1.3099156

SIMP is a proper motion (PM) survey made with the Observatoire du Mont Megantic (OMM) wide-field near-infrared camera CPAPIR at the CTIO 1.5 m and OMM 1.6 m telescopes. The SIMP observations were initiated in early 2005, are still ongoing and, to date, have covered 28% of the sky at high galactic latitudes. The PMs of the sources detected are determined by comparing their measured positions with those listed in the 2MASS point source catalog, giving a time baseline of 4 to 10 years. The 5 sigma uncertainty on the relative SIMP and 2MASS astrometry is 1", equivalent to a PM lower limit of 0.125-0.250"/yr, or a tangential velocity limit of 15-30 km/s at 25 pc. Up to the 2MASS magnitude limit (J~16.5), T dwarfs are found out to ~25 pc, while L dwarfs may be found as far as 100 pc away.

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