Article (Scientific journals)
Study of CCD mosaic configurations for the ILMT: Astrometry and photometry of point sources in the absence of a TDI corrector
Vangeyte, B.; Manfroid, Jean; Surdej, Jean
2002In Astronomy and Astrophysics, 388 (2), p. 712-731
Peer Reviewed verified by ORBi
 

Files


Full Text
Vangeyte_2002_A&A_388_712.pdf
Publisher postprint (976.17 kB)
Download

The authors thank EDP Sciences for their deposit authorization


All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
methods : observationnal; techniques : miscellaneous; telescopes
Abstract :
[en] The image deformations induced by the time-delay integration (TDI) mode, used with a CCD camera at the prime focus of a Liquid Mirror Telescope (LMT), can be corrected for by a system of lenses, simultaneously with the optical aberrations. However, before adopting the design of a TDI corrector, we may wonder what is the importance of the TDI image deformations and how to possibly reduce these by choosing optimal mosaic configurations of CCDs, covering an equivalent field of view. In a first step, we have simulated the point spread function (PSF) deformation due to the TDI mode only, for different selected mosaic configurations. We have then estimated the importance of the astrometric and photometric errors induced by the TDI deformation. By simulating star fields with the same synthetic PSF and taking into account realistic sources of noise (cf. CCD readout noise, photon noise and sky background), we have derived the limiting magnitudes for photometry and astrometry for the case of a 4 m LMT.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Vangeyte, B.
Manfroid, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
Study of CCD mosaic configurations for the ILMT: Astrometry and photometry of point sources in the absence of a TDI corrector
Publication date :
June 2002
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
388
Issue :
2
Pages :
712-731
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 August 2009

Statistics


Number of views
73 (12 by ULiège)
Number of downloads
147 (9 by ULiège)

Scopus citations®
 
2
Scopus citations®
without self-citations
1
OpenCitations
 
1

Bibliography


Similar publications



Contact ORBi