TDF: Vicky Scowcroft (Carnegie): The Carnegie Hubble Program

The Carnegie Hubble Program is a Warm Spitzer program designed to measure the Hubble constant to an accuracy of 3%. I will discuss the details of the program - from the Galactic Cepheid calibration to the Tully Fisher relation, emphasising how the unique properties of Spitzer make it ideal for a task such as this. I will introduce our new Spitzer program - the Carnegie RR Lyrae Program - discussing how it complements the CHP in terms of the time scales and objects studied.