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THE DISCOVERY OF THE MOST DISTANT KNOWN TYPE Ia SUPERNOVA AT REDSHIFT 1.914

David O. Jones, Steven A. Rodney, Adam G. Riess, Bahram Mobasher, Tomas Dahlen, Curtis McCully, Teddy F. Frederiksen, Stefano Casertano, Jens Hjorth, Charles R. Keeton, Anton Koekemoer, Louis-Gregory Strolger (+13 others)
2013 Astrophysical Journal  

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2013 pre-print
arXiv:1304.0768v1 fatcat:eksce3wckjbnpm6cyjjmilk4ou
2013 accepted
arXiv:1304.0768v2 fatcat:2tjb52ttxnag3k7uulf3ywxzkq
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 supernovae (SNe). Its apparent magnitude is consistent with that expected from
more » ... e 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.
doi:10.1088/0004-637x/768/2/166 fatcat:ii6lmt772zhnnblnzyof7okcby
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Citation

David O. Jones, Steven A. Rodney, Adam G. Riess, Bahram Mobasher, Tomas Dahlen, Curtis McCully, Teddy F. Frederiksen, Stefano Casertano, Jens Hjorth, Charles R. Keeton, Anton Koekemoer, Louis-Gregory Strolger, Tommy G. Wiklind, Peter Challis, Or Graur, Brian Hayden, Brandon Patel, Benjamin J. Weiner, Alexei V. Filippenko, Peter Garnavich, Saurabh W. Jha, Robert P. Kirshner, Henry C. Ferguson, Norman A. Grogin, Dale Kocevski. "THE DISCOVERY OF THE MOST DISTANT KNOWN TYPE Ia SUPERNOVA AT REDSHIFT 1.914." Astrophysical Journal 768.2 (2013) 166