116 citations · 161 across the 4 of their papers we have counts for
4 papers
The Metallicity Dependence of the Stellar Luminosity and Initial Mass Functions: HST Observations of Open and Globular Clusters
Ted von Hippel, Gerard Gilmore, Nial Tanvir +2
Using HST and the WFPC2 we have acquired very deep V- and I-band photometry of stars in NGC 2420 and NGC 2477 to study cluster luminosity functions at approximately solar metallici…
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…
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…