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2683863 
Journal Article 
The ultraviolet properties of star-forming galaxies - I. HST WFC3 observations of very high redshift galaxies 
Wilkins, SM; Bunker, AJ; Stanway, E; Lorenzoni, S; Caruana, J 
2011 
1 
Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
EISSN: 1365-2966 
417 
1 
717-729 
WOS:000296276300079 
The acquisition of late-time imaging is an important step in the analysis of pre-explosion observations of the progenitors of supernovae. We present late-time Hubble Space Telescope Advanced Camera for Surveys Wide-Field Channel observations of the sites of five Type IIP SNe: 1999ev, 2003gd, 2004A, 2005cs and 2006my. Observations were conducted using the F435W, F555W and F814W filters. We confirm the progenitor identifications for SNe 2003gd, 2004A and 2005cs, through their disappearance. We find that a source previously excluded as being the progenitor of SN 2006my has now disappeared. The late-time observations of the site of SN 1999ev cast significant doubt over the nature of the source previously identified as the progenitor in pre-explosion Wide Field Planetary Camera 2 images. The use of image subtraction techniques yields improved precision over photometry conducted on just the pre-explosion images alone. In particular, we note the increased depth of detection limits derived on pre-explosion frames in conjunction with late-time images. We use spectral energy distribution fitting techniques to explore the effect of different reddening components towards the progenitors. For SNe 2003gd and 2005cs, the pre-explosion observations are sufficiently constraining that only limited amounts of dust (either interstellar or circumstellar) are permitted. Assuming only a Galactic reddening law, we determine the initial masses for the progenitors of SNe 2003gd, 2004A, 2005cs and 2006my of 8.4 +/- 2.0, 12.0 +/- 2.1, 9.5(-2.2)(+3.4) and 9.8 +/- 1.7M(circle dot), respectively. 
galaxies: evolution; galaxies: formation; galaxies: high-redshift; galaxies: starburst; ultraviolet: galaxies