Identification of Type Ia Supernovae at Redshift 1.3 and Beyond with the Advanced Camera for Surveys on the Hubble Space Telescope | Zendy

Adam G. Riess | Zendy; Louis-Gregory Strolger | Zendy; J. Tonry | Zendy; Z. Tsvetanov | Zendy; Stefano Casertano | Zendy; Henry C. Ferguson | Zendy; Bahram Mobasher | Zendy; Peter Challis | Zendy; N. Panagia | Zendy; A. V. Filippenko | Zendy; Weidong Li | Zendy; R. Chornock | Zendy; R. Kirshner | Zendy; B. Leibundgut | Zendy; Mark Dickinson | Zendy; Anton M. Koekemoer | Zendy; Norman A. Grogin | Zendy; Mauro Giavalisco | Zendy

Open Access

Identification of Type Ia Supernovae at Redshift 1.3 and Beyond with the Advanced Camera for Surveys on the Hubble Space Telescope

Author(s) -

Adam G. Riess,

Louis-Gregory Strolger,

J. Tonry,

Z. Tsvetanov,

Stefano Casertano,

Henry C. Ferguson,

Bahram Mobasher,

Peter Challis,

N. Panagia,

A. V. Filippenko,

Weidong Li,

R. Chornock,

R. Kirshner,

B. Leibundgut,

Mark Dickinson,

Anton M. Koekemoer,

Norman A. Grogin,

Mauro Giavalisco

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/378311

Subject(s) - grism , redshift , advanced camera for surveys , physics , astrophysics , supernova , hubble space telescope , astronomy , brightness , galaxy , space telescope imaging spectrograph

We present discoveries of SNe Ia at z > 1 and the photometric diagnostic used to discriminate them from other types of SNe detected during the GOODS Hubble Space Telescope Treasury program with the Advanced Camera for Surveys (ACS). Photometric redshift measurements of the hosts combined with deep f606w, f775w, and f850lp imaging discriminates hydrogen-rich SNe II from SNe I at z > 1 by exploiting the ultraviolet (UV) deficit in the energy distributions of SNe Ia. This sorting allows rapid follow-up of space-based discoveries. Subsequent spectroscopy of 11 GOODS SNe Ia obtained from the ground and with the grism on ACS confirmed the reliability of our photometric screening. We present the highest-redshift spectrum of any supernova published to date, SN Ia 2002fw at z = 1.3 observed near maximum brightness with the ACS grism. The lack of UV flux for true SNe Ia provides an effective tool for our ongoing efforts to build a sample of SNe Ia at 1.2 < z < 1.8 which will extend the useful range of the magnitude-redshift relation of SNe Ia

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