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. Harpsoe; F. Hessman; T. C. Hinse; A. Hornstrup; M. Hundertmark; U. G. Jorgensen; C. Liebig; G. Maier; L. Mancini; G. Masi; M. Mathiasen; S. Rahvar; G. Scarpetta; J. Skottfelt; C. Snodgrass; J. Southworth; J. Teuber; C. C. Thone; 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. Harpsoe, F. Hessman, T. C. Hinse, A. Hornstrup, M. Hundertmark, U. G. JorgensenC. Liebig, G. Maier, L. Mancini, G. Masi, M. Mathiasen, S. Rahvar, G. Scarpetta, J. Skottfelt, C. Snodgrass, J. Southworth, J. Teuber, C. C. Thone, J. Wambsganss, F. Zimmer, M. Zub, J. Surdej

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Aims. We present VRi photometric observations of the quadruply imaged quasar HE0435-1223, 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 approximate to 0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (approximate to 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.

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

Keywords

quasars: general
gravitational lensing: weak
techniques: photometric
GRAVITATIONAL LENS
TIME-DELAY
GALAXY
QSO
HE-0435-1223
VARIABILITY
Q2237+0305

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10.1051/0004-6361/201016188

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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., Harpsoe, 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 & Astrophysics, 528, -. https://doi.org/10.1051/0004-6361/201016188

@article{8fe6284c7050442b9c08c96647b564f8,

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

abstract = "Aims. We present VRi photometric observations of the quadruply imaged quasar HE0435-1223, 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 approximate to 0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (approximate to 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.",

keywords = "quasars: general, gravitational lensing: weak, techniques: photometric, GRAVITATIONAL LENS, TIME-DELAY, GALAXY, QSO, HE-0435-1223, VARIABILITY, Q2237+0305",

author = "D. Ricci and J. Poels and A. Elyiv and F. Finet and Sprimont, {P. G.} 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. Harpsoe and F. Hessman and Hinse, {T. C.} and A. Hornstrup and M. Hundertmark and Jorgensen, {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 Thone, {C. C.} and J. Wambsganss and F. Zimmer and M. Zub and J. Surdej",

year = "2011",

month = apr,

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

language = "English",

volume = "528",

pages = "--",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP SCIENCES S A",

}

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, Harpsoe, K, Hessman, F, Hinse, TC, Hornstrup, A, Hundertmark, M, Jorgensen, UG, Liebig, C, Maier, G, Mancini, L, Masi, G, Mathiasen, M, Rahvar, S, Scarpetta, G, Skottfelt, J, Snodgrass, C, Southworth, J, Teuber, J, Thone, CC, Wambsganss, J, Zimmer, F, Zub, M & Surdej, J 2011, 'Flux and color variations of the quadruply imaged quasar HE 0435-1223', Astronomy & Astrophysics, vol. 528, pp. -. 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 - Harpsoe, K.

AU - Hessman, F.

AU - Hinse, T. C.

AU - Hornstrup, A.

AU - Hundertmark, M.

AU - Jorgensen, 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 - Thone, C. C.

AU - Wambsganss, J.

AU - Zimmer, F.

AU - Zub, M.

AU - Surdej, J.

PY - 2011/4

Y1 - 2011/4

N2 - Aims. We present VRi photometric observations of the quadruply imaged quasar HE0435-1223, 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 approximate to 0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (approximate to 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.

AB - Aims. We present VRi photometric observations of the quadruply imaged quasar HE0435-1223, 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 approximate to 0.2-0.4 magnitudes of the four lensed components in the three filters. We also found a significant increase (approximate to 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.

KW - quasars: general

KW - gravitational lensing: weak

KW - techniques: photometric

KW - GRAVITATIONAL LENS

KW - TIME-DELAY

KW - GALAXY

KW - QSO

KW - HE-0435-1223

KW - VARIABILITY

KW - Q2237+0305

U2 - 10.1051/0004-6361/201016188

DO - 10.1051/0004-6361/201016188

M3 - Article

SN - 0004-6361

VL - 528

SP - -

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -

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

Abstract

Keywords

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