[69.04] Supernovae at z$>$1.2 Discovered with the ACS on HST

AAS 205th Meeting, 9-13 January 2005
Session 69 Cosmology: Population III, Distant SNe, and Dark Energy
Poster, Tuesday, January 11, 2005, 9:20am-6:30pm, Exhibit Hall

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[69.04] Supernovae at z>1.2 Discovered with the ACS on HST

R. A. Gibbons, R. A. Knop (Vanderbilt University), N. Kuznetsova (Lawrence Berkeley National Laboratory), Supernova Cosmology Project Collaboration

We report on follow-up observations of supernovae found during four searches with the ACS on HST during 2004 April - 2004 August. The area of sky searched was that covered by the GOODS-North (170 square arcminutes). The searches successfully discovered supernovae in the redshift range 1.0 < z < 1.7. We present preliminary results from multicolor follow-up observations with ACS and NICMOS of two supernovae from this search that exploded well within the epoch of deceleration. These two supernovae may represent the most distant ever found during an intentional search and followed in detail both photometrically and spectroscopically.

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