Welcome! I am postdoctoral research assistant working on the Time Domain Spectroscopic Survey (TDSS) with Paul Green in the High Energy Astrophysics Division. TDSS is an SDSS-IV subproject that began summer 2014 and will continue for 4-6 years. Through the main TDSS program, we are obtaining initial characterization spectra of >100,000 optical variables selected from PanSTARRS-1 (see Morganson et al. 2015). In addition, the TDSS includes 9 separate smaller, "Few-Epoch Spectroscopy" (FES) programs to study spectroscopic variability. The FES programs target objects with existing SDSS spectroscopy amongst classes of quasars and stars of particular astrophysical interest. These include, in approximate order of decreasing sample size: Broad Absorption Line Quasars (BALQSOs), the most photometrically variable ("HyperVariable") quasars, high S/N normal broad line quasars, quasars with double-peaked or very asymmetric broad emission line profiles, Hypervariable stars, active ultracool (late-M and L-type) dwarf stars with Halpha emission, dwarf carbon stars, white dwarf/M dwarf spectroscopic binaries with Halpha emission, and binary supermassive black hole candidates from MgII broad line velocity shift analysis. Furthermore, a new program to obtain Repeat Quasar Spectroscopy (RQS) for of order 10,000 known quasars is now underway, as a pilot for a potentially larger program in future all-sky spectroscopic surveys. For a description of the FES and RQS programs, see MacLeod et al (2017).
My past research has focussed mainly on quasar variability and
gravitational lensing. For a
compilation of photometric measurements for SDSS
quasars, click here:
Quasar Variability from SDSS/POSS