Surface Photometry of a Sample of Globular Clusters in M31

Details Surface Photometry of a Sample of Globular Clusters in M31 Surface Photometry of a Sample of Globular Clusters in M31

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2583f&link_type=abstract

HST Proposal ID #2583

Physics

Hst Proposal Id #2583

Scientific paper

The purpose of the present program is to derive the surface brightness profiles of a number of globular clusters in M31, in order to study their morphology (e.g. King model vs. post- core-collapse) and their occurrence and frequency as a function of a number of physical and dynamical parameters of the clusters. The FOC/96 has been chosen for giving the best combination of space resolution and field of view, since most of the cluster light falls within the central region 3-4 arcsec radius wide. The space resolution of 0.022 arcsec offered by the FOC/96 is necessary in order to reveal the central cusps of post-core- collapse morphologies which may occur within a radial distance of 0.1 arcsec. For this reason, the deconvolution with an accurate PSF is very important for a correct interpretation of the data, and we plan to take also a few observations of stars and use the PSF thus determined, along with the jitter information for each cluster image and whatever information on the PSF the STScI will provide us, for the reduction of the cluster data.

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