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Determination of the Hubble constant from observations of Cepheid variables in the galaxy M96
N. R. Tanvir, T. Shanks, H. C. Ferguson +1
New Hubble Space Telescope observations of Cepheid variable stars in the nearby galaxy M96 give a distance to the host galaxy group, Leo-I, of 11.6+/-0.8 Mpc. This value, used in c…
HST polarization map of the ultraviolet emission from the outer jet in M87 and a comparison with the 2cm radio emission
R. C. Thomson, D. R. T. Robinson, N. R. Tanvir +2
We present the first high resolution polarization map of the ultraviolet emission from the outer jet in M87. The data were obtained by the Faint Object Camera (FOC) on the Hubble S…
A faint galaxy redshift survey to B=24
K. Glazebrook, R. Ellis, M. Colless +3
Using the multislit LDSS-2 spectrograph on the {\it William Herschel Telescope} we have completed a redshift survey in the magnitude range which has produced 73 redshi…
WFPC2 aperture photometry and PSF modelling
N. R. Tanvir, D. R. T. Robinson, T. von Hippel
Since the WFPC-2 undersamples the PSF, aperture photometry can produce results which are competetive with profile fitting in many situations. This article reports and investigation…