CCD photometry of Markarian 421 and 501

Hickson, P. ; Fahlman, G. G. ; Auman, J. R. ; Walker, G. A. H. ; Menon, T. K. ; Ninkov, Z. (1982) CCD photometry of Markarian 421 and 501 The Astrophysical Journal, 258 . pp. 53-58. ISSN 0004-637X

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Observations of the BL Lacertae objects Markarian 501 and 421 have been made with a CCD detector at the prime focus of a 3.6 m Canada-France-Hawaii telescope. Each object was observed in two bands of FWHM equaling approximately 700 Å, centered at 5000 and 6500 Å. Photometric profiles for both objects are shown to be consistent with composite profiles from a point source and an elliptical galaxy which obeys the de Vaucouleurs surface brightness law. The derived photometric parameters of the underlying galaxies show them to be apparently normal elliptical galaxies.

Item Type:Article
Source:Copyright of this article belongs to American Astronomical Society.
Keywords:Astronomical Photometry; BL Lacertae Objects; Galaxies; Brightness; Charge Coupled Devices; Elliptical Galaxies
ID Code:75481
Deposited On:27 Dec 2011 13:40
Last Modified:18 May 2016 19:29

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