Article (Scientific journals)
QSO 2237+0305 VR light curves from Gravitational Lenses International Time Project optical monitoring
Alcalde, D.; Mediavilla, E.; Moreau, O. et al.
2002In Astrophysical Journal, 572 (2, Part 1), p. 729-734
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Keywords :
galaxies : photometry; Cosmology: Gravitational Lensing; quasars : individual (Q2237+0305)
Abstract :
[en] We present VR observations of QSO 2237+ 0305 conducted by the Gravitational Lensing International Time Project collaboration from 1999 October 1 to 2000 February 3. The observations were made with the 2.56 m Nordic Optical Telescope at Roque de los Muchachos Observatory, La Palma ( Spain). The pointspread function ( PSF) fitting method and an adapted version of the ISIS subtraction method have been used to derive the VR light curves of the four components ( A D) of the quasar. The mean errors range in the intervals 0.01-0.04 mag ( PSF fitting) and 0.01-0.02 mag ( ISIS subtraction), with the faintest component ( D) having the largest uncertainties. We address the relatively good agreement between the A and D light curves derived using different filters, photometric techniques, and telescopes. The new VR light curves of component A extend the time coverage of a high-magnification microlensing peak, which was discovered by the OGLE team.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Alcalde, D.
Mediavilla, E.
Moreau, O.
Munoz, J. A.
Libbrecht, C.
Goicoechea, L. J.
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Puga, E.
De Rop, Yves ;  Université de Liège - ULiège > Administration de l'enseignement et des étudiants > AEE : Conseil général des études
Barrena, R.
Gil-Merino, R.
McLeod, B. A.
Motta, V.
Oscoz, A.
Serra-Ricart, M.
More authors (5 more) Less
Language :
English
Title :
QSO 2237+0305 VR light curves from Gravitational Lenses International Time Project optical monitoring
Publication date :
20 June 2002
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
University of Chicago Press, Chicago, United States - Illinois
Volume :
572
Issue :
2, Part 1
Pages :
729-734
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
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