PI: Jonathan Grindlay, Harvard U., firstname.lastname@example.org
Address: Department of Astronomy, 60 Garden St, Cambridge, Massachusetts 02138 United States
CoI: Sebastian Gomez, Harvard U.
Title: Search for Quiescent Black Hole X-ray Binaries from DASCH Transients
Abstract: A primary goal of the DASCH project at Harvard to digitize ~500,000 photographic imaging plates covering full sky over 100 years is to find new black hole low mass x-ray binaries (BH-LMXBs) as large amplitude historical outbursts on long timescales ($>30$d) in the DASCH data set. We have identified a number of DASCH transients with large amplitude ($>5-9$mag) and decay times resembling BH-LMXBs. We need SMARTS photometry for southern DASCH transients to measure binary periods which are needed for followup spectroscopy (proposed for Magellan) and mass function determinations. With quiescent magnitudes of (typically) R $sim 18-20$, we need the 1.3m and dark sky conditions for accurate light curves to distinguish BH-LMXBs from WZ Sge type CVs.
Program Type: Standard/Galactic
Run 1 (2017A): CT-1.3m/ANDI -- 20hrs
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360