Part II
  Tuesday 14 July
  15:10-15:25 	
  
  HPF: Habitable Planet Finder (HET) 	
  
  Christian Schwab
  (Macquarie U, Australia)
  - on behalf of -
  Suvrath Mahadevan
  (PennState, USA)
 
  The Habitable-Zone Planet Finder is a stabilized, fiber-fed, NIR spectrograph
  being built for the 10 m Hobby- Eberly telescope (HET) that will be capable of
  discovering low mass planets around M dwarfs. The optical design of the HPF is
  a white pupil spectrograph layout in a vacuum cryostat cooled to 180 K. The
  spectrograph uses gold-coated mirrors, a mosaic echelle grating, and a single
  Teledyne Hawaii-2RG (H2RG) NIR detector with a 1.7-mum cutoff covering parts
  of the information rich z, Y and J NIR bands at a spectral resolution of R ~
  50,000. The unique design of the HET requires attention to both near and
  far-field fiber scrambling, which we accomplish with double scramblers and 
  octagonal fibers. We discuss and summarize the main requirements and
  challenges of precision radial velocity measurements in the NIR with HPF and
  how we are overcoming these issues with technology, hardware and algorithm
  developments to achieve high RV precision and address stellar activity.