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Title: CCD Photometry of bright stars using objective wire mesh

Obtaining accurate photometry of bright stars from the ground remains problematic due to the danger of overexposing the target and/or the lack of suitable nearby comparison stars. The century-old method of using objective wire mesh to produce multiple stellar images seems promising for the precise CCD photometry of such stars. Furthermore, our tests on β Cep and its comparison star, differing by 5 mag, are very encouraging. Using a CCD camera and a 20 cm telescope with the objective covered by a plastic wire mesh, in poor weather conditions, we obtained differential photometry with a precision of 4.5 mmag per two minute exposure. Our technique is flexible and may be tuned to cover a range as big as 6-8 mag. We discuss the possibility of installing a wire mesh directly in the filter wheel.
Authors:
;  [1] ;  [2]
  1. Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Słoneczna 36, 60-286 Poznań (Poland)
  2. Copernicus Astronomical Centre, ul. Bartycka 18, PL 00-716 Warsaw (Poland)
Publication Date:
OSTI Identifier:
22340219
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (New York, N.Y. Online); Journal Volume: 147; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCURACY; CAMERAS; CEPHEIDS; CHARGE-COUPLED DEVICES; COMPARATIVE EVALUATIONS; FILTERS; IMAGES; OSCILLATIONS; PHOTOMETRY; RADIO TELESCOPES; STARS