NOAO >   Observing Info >   Approved Programs >   2017B-0044

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Program Information for 2017B-0044


PI: Tingting Liu, U. of Maryland, tingting@astro.umd.edu
Address: Department of Astronomy, 1113 Physical Sciences Complex, College Park, MD 20742

CoI: Suvi Gezari, U. of Maryland

Title: Monitoring Variability-Selected Supermassive Black Hole Binary Candidates from Pan-STARRS1

Abstract: Periodic variability in quasars has been predicted as an observational signature of supermassive black hole binaries (SMBHBs), which should be a common product of the hierarchy growth of galaxies. We have performed a systematic search in the Pan-STARRS1 Medium Deep Survey and identified a number of periodic quasar candidates with variations over $> 1.5$ cycles. We have been monitoring them with the Large Monolithic Imager at the Discovery Channel Telescope, since a long baseline is essential in order to break a false positive signal due to normal, stochastic quasar variability. Here we propose to continue and expand our imaging campaign with LCO. The proposed observations will be able to verify strong SMBHB candidates that are in the gravitational wave regime of orbital decay accessible to the Pulsar Timing Arrays and for the upcoming era of the Large Synoptic Survey Telescope.

Program Type: Standard/LCO

Scheduled Nights:
Run 1 (2017B):  LCO-2m/Spectral -- 38hrs


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NOAO >   Observing Info >   Approved Programs >   2017B-0044

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