Josh Peek edited section_Methods_Results_USNO_A0600__.tex  almost 8 years ago

Commit id: 297386eb85dc0086beafcdfb2b108435d8c29237

deletions | additions      

       

\section{Methods & Results}  USNO-A0600-15865535 is a bright ($g= 14.2$) very blue ($g-r = -0.21$) source, unresolved in Pan-STARRS imaging. Through a combination of overoptimism and clerical errors, it was targeted as a quasar candidate behind the circumgalactic medium of M83 in VLT Program ID 097.A-0552(A). The R \sim 25000, high SNR spectra subsequently of USNO-A0600-15865535  showed it to have very strong H$\epsilon$ and H$\zeta$ at Milky Way rest frame, and thus was very likely to be a star in the Milky Way. Way, rather than the quasar we had originally hoped for.  Such stars are typically either Blue Horizontal Branch (BHB) stars or Blue Stragglers (BS) stars, though can occasionally be hot main sequence (MS) stars. To distinguish between these possibilities, we use a modification of the method developed by \cite{Sirko_2004} and later explored by \cite{Xue_2008}. In these works the shape of the H$\gamma$ and H$\delta$ lines are used to distinguish between these populations. The Balmer lines are fit with a standard Sersi\'c profile,