NOAO >   Observing Info >   Approved Programs >   2015B-0313

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Program Information for 2015B-0313


PI: Ryan Foley, U. of Illinois Urbana-Champaign, foley@ucsc.edu
Address: Astronomy Department, 1002 W Green St, Urbana, IL 61801 USA

CoI: Armin Rest, STScI
CoI: Daniel Scolnic, U. of Chicago
CoI: Yen-Chen Pan, U. of Illinois Urbana-Champaign
CoI: Saurabh W Jha, Rutgers U.
CoI: Rebekah Hounsell, STScI

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) double 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 half of 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 $\le$ 5\%. Here, we propose to obtain the necessary spectroscopy for this sample.

Program Type: Long Term/Extragalactic

Scheduled Nights:
Run 1 (2015B):  KP-4m/KOSMOS -- 2n on Sep 15 2015, Jan 03 2016
Run 1 (2016A):  KP-4m/KOSMOS -- 4n on Feb 01 2016, Apr 05 2016, May 05 2016, Jun 07 2016
Run 1 (2016B):  KP-4m/KOSMOS -- 9n on Aug 05 - Aug 07 2016, Aug 09 - Aug 10 2016, Nov 29 - Nov 30 2016, Dec 26 2016, Jan 30 - Jan 31 2017
Run 2 (2015B):  SOAR/Goodman -- 6n on Aug 20 2015, Sep 13 2015, Oct 10 2015, Nov 13 2015, Dec 17 2015, Jan 13 2016
Run 2 (2016A):  SOAR/Goodman -- 6n on Feb 08 2016, Mar 11 2016, Apr 14 2016, May 07 2016, Jun 09 2016, Jul 27 2016
Run 2 (2016B):  SOAR/Goodman -- 6n on Aug 10 2016, Sep 06 2016, Oct 07 2016, Oct 29 2016, Jan 02 2017, Jan 18 2017


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



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