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High-resolution imaging of the double QSO 2345 + 007

Weir, Nicholas and Djorgovski, S. (1991) High-resolution imaging of the double QSO 2345 + 007. Astronomical Journal, 101 (1). pp. 66-70. ISSN 0004-6256. https://resolver.caltech.edu/CaltechAUTHORS:20190816-150502036

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Abstract

We present raw and maximum entropy restored images of the quasar pair (gravitational lens candidate) 2345 + 007 A and B. 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 our data imply that we are able to detect structure in the restored images down to the 0.4" level. Using this method, we qualitatively confirm 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. We also find evidence for a color difference and variation in the magnitude difference between the two components. We believe these data, in conjunction with recent spectroscopic results, more likely favor the multiple quasar rather than gravitational lens interpretation of the objects.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1086/115666DOIArticle
ORCID:
AuthorORCID
Djorgovski, S.0000-0002-0603-3087
Additional Information:© 1991 American Astronomical Society. Provided by the NASA Astrophysics Data System. Received 26 June 1990; revised 14 September 1990. We wish to thank R. Ramos de Carvalho for obtaining the images on 23 September at the Palomar 60 in. telescope. We would also like to thank the staff of Palomar Observatory, especially J. Carrasco, M. Doyle, J. Henning, and D. Tennant. We acknowledge partial support from the California Institute of Technology and the Alfred P. Sloan Foundation (S.D.) This material is based upon work supported under a National Science Foundation Graduate Fellowship (N.W.).
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Funding AgencyGrant Number
CaltechUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
NSF Graduate Research FellowshipUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20190816-150502036
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190816-150502036
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97987
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Aug 2019 22:15
Last Modified:03 Oct 2019 21:36

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