NOAO >   Observing Info >   Approved Programs >   2017A-0306

Small NOAO Logo

Program Information for 2017A-0306


PI: Ryan Foley, UC Santa Cruz, foley@ucsc.edu
Address: Astronomy Department, 1156 High St, Santa Cruz, CA 95064 USA

CoI: Armin Rest, STScI
CoI: Daniel Scolnic, U. of Chicago
CoI: Yen-Chen Pan, UC Santa Cruz
CoI: Saurabh Jha, Rutgers U.
CoI: Charles Kilpatrick, UC Santa Cruz
CoI: David Coulter, UC Santa Cruz
CoI: Matt Siebert, UC Santa Cruz
CoI: Kyle Dettman, Rutgers U.

Title: The Next Generation Low-z Type Ia Supernova Sample for Cosmology

Abstract: Type~Ia supernovae (SNe~Ia) are one of the best probes to constrain the nature of dark energy. Recent surveys have observed such a large number of high-$z$ SNe~Ia that cosmological constraints are now limited by systematics and the relatively small number of low-$z$ SNe. We are conducting a survey to construct an unbiased, high-fidelity low-$z$ SN~Ia sample in the Pan-STARRS1 natural system to improve SN cosmology constraints. This sample will (1) quadruple the number of cosmologically useful low-$z$ SNe~Ia, (2) be unique in its photometric calibration precision, and (3) be the only low-$z$ SN~Ia sample observed with the same system as a high-$z$ sample. This program will also fulfill the WFIRST low-$z$ SN~Ia requirement. Our homogeneous low-$z$ sample will minimize the largest systematic error sources and with it, we will acquire a state-of-the-art constraint on the equation-of-state parameter of dark energy, $w$, to $<%. Here, we propose to obtain the necessary spectroscopy for this sample.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2017A):  KP-4m/KOSMOS -- 3.5n on Jun 28 - Jun 29 2017, Jul 25 - Jul 26 2017
Run 2 (2017A):  SOAR/Goodman -- 6n on Feb 23 2017, Mar 28 2017, Apr 30 2017, May 28 2017, Jun 20 2017, Jul 17 2017


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017A-0306

noaoprop-help@noao.edu

Small NOAO Logo