3 papers
astro-ph.GA2017
The Orbit and Origin of the Ultra-faint Dwarf Galaxy Segue 1
T. K. Fritz, M. Lokken, N. Kallivayalil +4
We present the first proper motion measurement for an ultra-faint dwarf spheroidal galaxy, Segue 1, using SDSS and LBC data as the first and second epochs separated by a baseline o…
astro-ph.GA2016
The Proper Motion of Pyxis: the first use of Adaptive Optics in tandem with HST on a faint halo object
Tobias K. Fritz, Sean T. Linden, Paul Zivick +13
We present a proper motion measurement for the halo globular cluster Pyxis, using HST/ACS data as the first epoch, and GeMS/GSAOI Adaptive Optics data as the second, separated by a…
astro-ph.IM2016
Astrometry with MCAO at Gemini and at ELTs
Tobias K. Fritz, Nitya Kallivayalil, Eleazar R. Carrasco +11
We present in this study a first analysis of the astrometric error budget of absolute astrometry relative to background galaxies using adaptive optics. We use for this analysis mul…