منابع مشابه
Crowded - field photometry from HST - imaging ⋆
We present a thorough investigation of stellar photometry based on HST imaging of crowded fields at 85 and 10 from the centre of the high-surface brightness elliptical galaxy M32. The Principal Investigators of the present archive data have elsewhere presented an impressive colour-magnitude diagram of the field at 85. Based on the same data we enlarge on their photometric analysis and supplemen...
متن کاملThe TAOS Project: High-Speed Crowded Field Aperture Photometry
We have devised an aperture photometry pipeline for data reduction of image data from the Taiwanese-American Occultation Survey (TAOS). The photometry pipeline has high computational performance, and is capable of real-time photometric reduction of images containing up to 1000 stars, within the sampling rate of 5 Hz. The pipeline is optimized for both speed and signal-to-noise performance, and ...
متن کاملHST Photometry of Dense Globular
It is shown that in very crowded elds, such as the cores of globular clusters, aperture pho-tometry of subsampled-deconvolved HST/WFPC2 images gives statistically better results than any of the following DAOPHOT-II reductions of the original data: aperture photometry, proole-tting photometry, and the hybrid method of aperture photometry on neighbour-subtracted images. Furthermore , the deconvol...
متن کاملTitan’s North–South Asymmetry from HST and Voyager Imaging: Comparison with Models and Ground-Based Photometry
Tomasko and Smith (1982). Examination of the Voyager 2 (V2) data in Smith et al. (1982) reported no significant New measurements of Titan’s hemispheric brightness asymvariation from V1 to V2, consistent with a seasonally varymetry from HST images from 260 to 1040 nm show that the contrast is strongest near 450 nm (blue) and, with the opposite ing asymmetry at a peak in the early 1980s (i.e., ne...
متن کاملHst Photometry and Surface Mapping of Asteroid
Astronomy, University of Maryland, College Park MD 20742, ([email protected]), Joel Wm. Parker, Eliot F. Young, Dept. of Space Studies, SwRI, Boulder CO 80302, Peter. C. Thomas, Center for Radiophysics and Space Research, Cornell University, Ithaca NY 14853, Christopher T. Russell, IGPP & ESS, UCLA, Los Angeles CA 90095, S. Alan Stern, Dept. of Space Studies, SwRI, Boulder CO 80302, Mark V. Sy...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics Supplement Series
سال: 1998
ISSN: 0365-0138,1286-4846
DOI: 10.1051/aas:1998354