Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101...66w&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 101, Jan. 1991, p. 66-70. Research supported by the California Institute of Technolo
Astronomy and Astrophysics
Astronomy
15
Astronomical Photometry, Gravitational Lenses, Quasars, Charge Coupled Devices, High Resolution, Maximum Entropy Method, Spatial Resolution
Scientific paper
Raw and maximum entropy restored images of the quasar pair (gravitational lens candidate) 2345 + 007 A and B are presented. Restorations are performed using an implementation of the Gull-Skilling MEMSYS-3 package of maximum entropy method subroutines designed to achieve subpixel resolution in certain data regimes. Extensive simulations of the data imply that it is possible to detect structure in the restored images down to the 0.4 inch level. Using this method, it is qualitatively confirmed that component B is resolved and, at least at visual and red wavelengths, elongated in a direction almost perpendicular to the line joining A and B. Evidence is found for a color difference and variation in the magnitude difference between the two components. These data, in conjunction with recent spectroscopic results, more likely favor the multiple quasar rather than gravitational lens interpretation of the objects.
Djorgovski Stanislav
Weir Nicholas
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