Reference : Flux and color variations of the quadruply imaged quasar HE 0435--1223
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/86486
Flux and color variations of the quadruply imaged quasar HE 0435--1223
English
Ricci, Davide mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Poels, Joël [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Elyiv, Andrii mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Finet, François mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Sprimont, Pierre-Guillaume [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Anguita, T. [> > > >]
Bozza, V. [> > > >]
Browne, P. [> > > >]
Burgdorf, M. [> > > >]
Calchi Novati, S. [> > > >]
Dominik, M. [> > > >]
Dreizler, S. [> > > >]
Glitrup, M. [> > > >]
Grundahl, F. [> > > >]
Harps\oe, K. [> > > >]
Hessman, F. [> > > >]
Hinse, T~C [> > > >]
Hornstrup, A. [> > > >]
Hundertmark, M. [> > > >]
J\orgensen, U~G [> > > >]
Liebig, C. [> > > >]
Maier, G. [> > > >]
Mancini, L. [> > > >]
Masi, G. [> > > >]
Mathiasen, M. [> > > >]
Rahvar, S. [> > > >]
Skottfelt, G~S~J [> > > >]
Snodgrass, C. [> > > >]
Southworth, J. [> > > >]
Teuber, J. [> > > >]
Thöne, C~C [> > > >]
Wambsganß, J. [> > > >]
Zimmer, F. [> > > >]
Zub, M. [> > > >]
Surdej, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
2011
Astronomy and Astrophysics
EDP Sciences
528
A42-A49
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] Astrophysics ; Cosmology ; Extragalactic Astrophysics
[en] We present VRi photometric observations of the quadruply imaged quasar HE 0435-1223, carried out with the Danish 1.54m telescope at the La Silla Observatory. Our aim was to monitor and study the magnitudes and colors of each lensed component as a function of time. methods: We monitored the object during two seasons (2008 and 2009) in the VRi spectral bands, and reduced the data with two independent techniques: difference imaging and PSF (Point Spread Function) fitting.results: Between these two seasons, our results show an evident decrease in flux by ~0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (~0.05-0.015) in their V-R and R-i color indices. conclusions: These flux and color variations are very likely caused by intrinsic variations of the quasar between the observed epochs. Microlensing effects probably also affect the brightest "A" lensed component.
Researchers ; Professionals
http://hdl.handle.net/2268/86486
The authors thank The SAO/NASA Astrophysics Data System for their preprint deposit authorization.

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
1101.3664v2.pdfAuthor postprint1.02 MBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.