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Star clusters of the Andromeda galaxy. Multicolour HST photometry
Proceedings of the International Astronomical Union, 2019AbstractWe performed a new integrated photometry in six passbands on HST M31 PHAT survey mosaics of 1181 star clusters spread over a large range of radial distance. Due to strongly varying background we interactively determined its level based on image and growth-curve analysis.
Rokas Naujalis +2 more
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Phobos Disk-Integrated Photometry: 1994–1997 HST Observations
Icarus, 1999Abstract A program of synoptic monitoring of Mars was carried out with the Hubble Space Telescope from August 8, 1994, through October 9, 1997, using the Wide Field Planetary Camera 2 (WFPC2). With the improved optics of the WFPC2 and the high angular resolution of the Planetary Camera (0.0442–0.0455 arcsec/pixel) we have been able to use these ...
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HST Photometry of Low-Mass Stars in Open Clusters
1995We report our early results from very deep (V ~ 25) photometry of two open clusters, NGc 2477 and NGc 2420, from which we derive their present-day mass functions down to ≤ 0. 2 M⊙. These data were acquired with the aberration-corrected Hubble Space Telescope using the Wide Field and Planetary camera.
T. von Hippel +2 more
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VI HST photometry of VV124 = UGC4879 (Bellazzini+, 2011)
2011Magnitudes (in the ACS-WFC VEGAMAG system), positions and crowding parameter (CRO) for 69795 stars in the considered HST ACS-WFC field (dwarf galaxy VV124).
Bellazzini, M. +3 more
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Hot massive stars in M33: HST UV spectroscopy and photometry
AIP Conference Proceedings, 1997HST is used to study massive star populations in galaxies of the Local Group beyond the Magellanic Clouds (M31, M33, NGC6822). The purpose is to compare massive star parameters in parent galaxies with different metallicities and star formation histories. Some results for hot stars in M33 are described here.
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Detection, Photometry, and Completeness of FOCAS Catalogs for the HST Medium-Deep Survey
Publications of the Astronomical Society of the Pacific, 1995We discuss the methods which we have developed and applied to optimize the detection efficiency of faint galaxies with the HST Wide Field and Planetary Cameras both prior and subsequent to the HST refurbishment mission in December 1993. Our methods are based on the FOCAS (Tyson and Jarvis 1979) automated detection software package, which we have ...
Lyman Neuschaefer +3 more
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HST photometry of the stars near the center of PN NGC 650
Astronomy & Astrophysics, 1998Colours and magnitudes of the central star of NGC 650 and its two companions have been obtained from HST images. The spectral types of the companions, which have been deduced from the colours, suggest a probable distance to the companions of between 5 and 6 kpc.
Koornneef, J, Pottasch, [No Value]
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HST photometry of Globular Clusters in the Sombrero Galaxy
We explore the rich globular cluster (GC) system of the nearby Sa galaxy M104, the "Sombrero" (NGC 4594), using archive WFPC2 data. The GC colour distribution is found to be bimodal at the > 99% level, with peaks at V-I = 0.96+/-0.03 and 1.21+/-0.03 (corrected for foreground reddening).Forbes, D. +5 more
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HST photometry of M51 cluster (Bik+, 2003)
Astronomy & Astrophysics, 2003Bik, A. +4 more
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HST Photometry of the Stellar Populations in the Sextans A Dwarf Irregular Galaxy
Bulletin of the American Astronomical Society, 1996Skillman, E.~D. +8 more
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