Journal
ASTRONOMICAL JOURNAL
Volume 133, Issue 6, Pages 2709-2715Publisher
IOP PUBLISHING LTD
DOI: 10.1086/517492
Keywords
galaxies : high-redshift; instrumentation : adaptive optics; supernovae : general; techniques : high angular resolution
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We present Keck diffraction-limited H-band photometry of a z similar to 1.3 Type Ia supernova ( SN) candidate, first identified in a Hubble Space Telescope search for SNe in massive high-redshift galaxy clusters. The adaptive optics ( AO) data were obtained with the Laser Guide Star facility during four observing runs from 2005 September to November. In the analysis of data from the observing run nearest to maximum SN brightness, the SN was found to have a magnitude H = 23.9 +/- 0.14 ( Vega). We present the H-band ( approximately rest-frame R) light curve and provide a detailed analysis of the AO photometric uncertainties. By constraining the aperture correction with a nearby ( 4 separation) star we achieve 0.14 mag photometric precision, despite the spatially varying AO point-spread function.
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