The Discovery of HD 37605c and a Dispositive Null Detection of Transits of HD 37605b
Sharon Xuesong Wang, Jason T. Wright, William Cochran, Stephen R., Kane, Gregory W. Henry, Matthew J. Payne, Michael Endl, Phillip J. MacQueen,, Jeff A. Valenti, Victoria Antoci, Diana Dragomir, Jaymie M. Matthews, Andrew, W. Howard, Geoffrey W. Marcy, Howard Isaacson

TL;DR
This study discovered a second planet around HD 37605 using nearly 8 years of radial velocity data, refined the orbit of the known planet, and conducted a transit search that resulted in a null detection, constraining the planet's transit probability.
Contribution
It provides a detailed orbital solution for the HD 37605 system and introduces the BOOTTRAN package for uncertainty analysis, with a null transit detection for HD 37605b.
Findings
Discovered a second planetary companion with a ~7.5-year period.
Null detection of transits, excluding certain impact parameters and depths.
Provided a precise transit ephemeris and orbital parameters for the system.
Abstract
We report the radial-velocity discovery of a second planetary mass companion to the K0 V star HD 37605, which was already known to host an eccentric, P~55 days Jovian planet, HD 37605b. This second planet, HD 37605c, has a period of ~7.5 years with a low eccentricity and an Msini of ~3.4 MJup. Our discovery was made with the nearly 8 years of radial velocity follow-up at the Hobby-Eberly Telescope and Keck Observatory, including observations made as part of the Transit Ephemeris Refinement and Monitoring Survey (TERMS) effort to provide precise ephemerides to long-period planets for transit follow-up. With a total of 137 radial velocity observations covering almost eight years, we provide a good orbital solution of the HD 37605 system, and a precise transit ephemeris for HD 37605b. Our dynamic analysis reveals very minimal planet-planet interaction and an insignificant transit time…
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