NOAO >   Observing Info >   Approved Programs >   2017A-0325

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Program Information for 2017A-0325


PI: Jonathan Grindlay, Harvard U., jgrindlay@cfa.harvard.edu
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

Scheduled Nights:
Run 1 (2017A):  CT-1.3m/ANDI -- 20hrs


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NOAO >   Observing Info >   Approved Programs >   2017A-0325

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