The discovery of the most distant known type Ia supernova at redshift 1.914

TY - JOUR

T1 - The discovery of the most distant known type Ia supernova at redshift 1.914

AU - Jones, Dennis

AU - Rodney, S.A.

AU - Riess, A.G.

AU - Dahlen, T.

AU - Casertano, S.

AU - Koekemoer, A.

AU - Ferguson, H.C.

AU - Grogin, N.A.

AU - Mobasher, B.

AU - McCully, C.

AU - Keeton, C.R.

AU - Patel, B.

AU - Jha, S.W.

AU - Hjorth, Jens

AU - Frederiksen, T.F.

AU - Strolger, L.-G.

AU - Wiklind, T.G.

AU - Challis, P.

AU - Kirshner, R.P.

AU - Kocevski, D.

AU - Graur, O.

AU - Hayden, B.

AU - Garnavich, P.

AU - Weiner, B.J.

AU - Filippenko, A.V.

PY - 2013/5/10

Y1 - 2013/5/10

N2 - We present the discovery of a Type Ia supernova (SN) at redshift z = 1.914 from the CANDELS multi-cycle treasury program on the Hubble Space Telescope (HST). This SN was discovered in the infrared using the Wide-Field Camera 3, and it is the highest-redshift Type Ia SN yet observed. We classify this object as a SN Ia by comparing its light curve and spectrum with those of a large sample of Type Ia and core-collapse SNe. Its apparent magnitude is consistent with that expected from the ΛCDM concordance cosmology. We discuss the use of spectral evidence for classification of z > 1.5 SNe Ia using HST grism simulations, finding that spectral data alone can frequently rule out SNe II, but distinguishing between SNe Ia and SNe Ib/c can require prohibitively long exposures. In such cases, a quantitative analysis of the light curve may be necessary for classification. Our photometric and spectroscopic classification methods can aid the determination of SN rates and cosmological parameters from the full high-redshift CANDELS SN sample.

AB - We present the discovery of a Type Ia supernova (SN) at redshift z = 1.914 from the CANDELS multi-cycle treasury program on the Hubble Space Telescope (HST). This SN was discovered in the infrared using the Wide-Field Camera 3, and it is the highest-redshift Type Ia SN yet observed. We classify this object as a SN Ia by comparing its light curve and spectrum with those of a large sample of Type Ia and core-collapse SNe. Its apparent magnitude is consistent with that expected from the ΛCDM concordance cosmology. We discuss the use of spectral evidence for classification of z > 1.5 SNe Ia using HST grism simulations, finding that spectral data alone can frequently rule out SNe II, but distinguishing between SNe Ia and SNe Ib/c can require prohibitively long exposures. In such cases, a quantitative analysis of the light curve may be necessary for classification. Our photometric and spectroscopic classification methods can aid the determination of SN rates and cosmological parameters from the full high-redshift CANDELS SN sample.

UR - http://www.scopus.com/inward/record.url?scp=84877077333&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/768/2/166

DO - 10.1088/0004-637X/768/2/166

M3 - Journal article

AN - SCOPUS:84877077333

SN - 0004-637X

VL - 768

SP - 166

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -