(Proposal ID) S12A-048

(PI) Bakos, Gaspar

(Proposal Title)
Confirmation of HATNet Transiting Planets Using Subaru/HDS

(Abstract)
Wide-field photometric observations by the HATNet project, along with a 
massive effort of follow-up photometry and low-S/N spectroscopy, have produced 
hundreds of high quality transiting exoplanet (TEP) candidates. To date we 
have {announced 33 TEPs} (called HAT-P-1b through 33b, all published/
submitted), have several more that will soon be announced, and have dozens of 
promising candidates awaiting final confirmation. The HAT planets have 
exhibited an amazing diversity, ranging 3 orders of magnitude in mass, from 
the hot Neptune HAT-P-26b to the supermassive HAT-P-2b.  Three of the HAT 
systems are multiple planetary systems (HAT-P-13, -17, and -31). Further, 
these are all around relatively bright stars, enabling a plethora of follow-up 
studies.  In order to confirm or refute the planetary nature of our candidates,
it is essential to gather high precision radial velocity observations and 
perform spectral bisector analysis using the state-of-the-art facility 
Subaru/HDS.  We propose for 4 nights, scheduled either as consecutive whole 
nights, or as two sets of 4 consecutive half-nights. Based on previous 
experience we are confident that this effort will lead to the announcement of 
many new and exciting transiting exoplanets.