Flux and color variations of the quadruply imaged quasar HE 0435-1223

D. Ricci; J. Poels; A. Elyiv; F. Finet; P.G. Sprimont; T. Anguita; V. Bozza; P. Browne; M. Burgdorf; S. Calchi Novati; M. Dominik; S. Dreizler; M. Glitrup; F. Grundahl; K. Harpsøe; F. Hessman; T. C. Hinse; Allan Hornstrup; M. Hundertmark; U. G. Jørgensen; C. Liebig; G. Maier; L. Mancini; G. Masi; M. Mathiasen; S. Rahvar; G. Scarpetta; J. Skottfelt; C. Snodgrass; J. Southworth; J. Teuber; C. C. Thöne; J. Wambsganß; F. Zimmer; M. Zub; J. Surdej

doi:10.1051/0004-6361/201016188

Flux and color variations of the quadruply imaged quasar HE 0435-1223

D. Ricci, J. Poels, A. Elyiv, F. Finet, P.G. Sprimont, T. Anguita, V. Bozza, P. Browne, M. Burgdorf, S. Calchi Novati, M. Dominik, S. Dreizler, M. Glitrup, F. Grundahl, K. Harpsøe, F. Hessman, T. C. Hinse, Allan Hornstrup, M. Hundertmark, U. G. JørgensenC. Liebig, G. Maier, L. Mancini, G. Masi, M. Mathiasen, S. Rahvar, G. Scarpetta, J. Skottfelt, C. Snodgrass, J. Southworth, J. Teuber, C. C. Thöne, J. Wambsganß, F. Zimmer, M. Zub, J. Surdej

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Abstract

Aims: We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m 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 point spread function (PSF) 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. © ESO, 2011.

Original language	English
Journal	Astronomy and Astrophysics
Volume	528
Pages (from-to)	A42
Number of pages	8
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201016188
Publication status	Published - 2011

Keywords

Techniques: photometric
Quasars: general
Gravitational lensing: weak

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Ricci, D., Poels, J., Elyiv, A., Finet, F., Sprimont, P. G., Anguita, T., Bozza, V., Browne, P., Burgdorf, M., Calchi Novati, S., Dominik, M., Dreizler, S., Glitrup, M., Grundahl, F., Harpsøe, K., Hessman, F., Hinse, T. C., Hornstrup, A., Hundertmark, M., ... Surdej, J. (2011). Flux and color variations of the quadruply imaged quasar HE 0435-1223. Astronomy and Astrophysics, 528, A42. https://doi.org/10.1051/0004-6361/201016188

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title = "Flux and color variations of the quadruply imaged quasar HE 0435-1223",

abstract = "Aims: We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m 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 point spread function (PSF) 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. {\textcopyright} ESO, 2011.",

keywords = "Techniques: photometric, Quasars: general, Gravitational lensing: weak",

author = "D. Ricci and J. Poels and A. Elyiv and F. Finet and P.G. Sprimont and T. Anguita and V. Bozza and P. Browne and M. Burgdorf and {Calchi Novati}, S. and M. Dominik and S. Dreizler and M. Glitrup and F. Grundahl and K. Harps{\o}e and F. Hessman and Hinse, {T. C.} and Allan Hornstrup and M. Hundertmark and J{\o}rgensen, {U. G.} and C. Liebig and G. Maier and L. Mancini and G. Masi and M. Mathiasen and S. Rahvar and G. Scarpetta and J. Skottfelt and C. Snodgrass and J. Southworth and J. Teuber and Th{\"o}ne, {C. C.} and J. Wambsgan{\ss} and F. Zimmer and M. Zub and J. Surdej",

year = "2011",

doi = "10.1051/0004-6361/201016188",

language = "English",

volume = "528",

pages = "A42",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Ricci, D, Poels, J, Elyiv, A, Finet, F, Sprimont, PG, Anguita, T, Bozza, V, Browne, P, Burgdorf, M, Calchi Novati, S, Dominik, M, Dreizler, S, Glitrup, M, Grundahl, F, Harpsøe, K, Hessman, F, Hinse, TC, Hornstrup, A, Hundertmark, M, Jørgensen, UG, Liebig, C, Maier, G, Mancini, L, Masi, G, Mathiasen, M, Rahvar, S, Scarpetta, G, Skottfelt, J, Snodgrass, C, Southworth, J, Teuber, J, Thöne, CC, Wambsganß, J, Zimmer, F, Zub, M & Surdej, J 2011, 'Flux and color variations of the quadruply imaged quasar HE 0435-1223', Astronomy and Astrophysics, vol. 528, pp. A42. https://doi.org/10.1051/0004-6361/201016188

TY - JOUR

T1 - Flux and color variations of the quadruply imaged quasar HE 0435-1223

AU - Ricci, D.

AU - Poels, J.

AU - Elyiv, A.

AU - Finet, F.

AU - Sprimont, P.G.

AU - Anguita, T.

AU - Bozza, V.

AU - Browne, P.

AU - Burgdorf, M.

AU - Calchi Novati, S.

AU - Dominik, M.

AU - Dreizler, S.

AU - Glitrup, M.

AU - Grundahl, F.

AU - Harpsøe, K.

AU - Hessman, F.

AU - Hinse, T. C.

AU - Hornstrup, Allan

AU - Hundertmark, M.

AU - Jørgensen, U. G.

AU - Liebig, C.

AU - Maier, G.

AU - Mancini, L.

AU - Masi, G.

AU - Mathiasen, M.

AU - Rahvar, S.

AU - Scarpetta, G.

AU - Skottfelt, J.

AU - Snodgrass, C.

AU - Southworth, J.

AU - Teuber, J.

AU - Thöne, C. C.

AU - Wambsganß, J.

AU - Zimmer, F.

AU - Zub, M.

AU - Surdej, J.

PY - 2011

Y1 - 2011

N2 - Aims: We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m 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 point spread function (PSF) 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. © ESO, 2011.

AB - Aims: We present VRi photometric observations of the quadruply imaged quasarHE0435-1223, carried out with the Danish 1.54 m 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 point spread function (PSF) 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. © ESO, 2011.

KW - Techniques: photometric

KW - Quasars: general

KW - Gravitational lensing: weak

U2 - 10.1051/0004-6361/201016188

DO - 10.1051/0004-6361/201016188

M3 - Journal article

SN - 0004-6361

VL - 528

SP - A42

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Flux and color variations of the quadruply imaged quasar HE 0435-1223

Abstract

Keywords

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