NOAO >   Observing Info >   Approved Programs >   2018A-0277

Small NOAO Logo

Program Information for 2018A-0277


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.
CoI: Tyler Takaro, UC Santa Cruz
CoI: David Jones, UC Santa Cruz
CoI: Georgios Dimitriadis, UC Santa Cruz
CoI: Cesar Rojas-Bravo, UC Santa Cruz
CoI: Enia Xhakaj, UC Santa Cruz

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 $<%. We have submitted a paper presenting our first sample (225 SNe Ia), and here, we propose to obtain the necessary spectroscopy to continue this successful project.

Program Type: Standard/Extragalactic

Scheduled Nights:
Run 1 (2018A):  SOAR/Goodman -- 6n on Feb 07 2018, Mar 21 2018, Apr 20 2018, May 12 2018, Jun 17 2018, Jul 16 2018


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 >   2018A-0277

noaoprop-help@noao.edu

Small NOAO Logo