2011A&A...528A..42R

Query : 2011A&A...528A..42R

2011A&A...528A..42R - Astronomy and Astrophysics, volume 528A, 42-42 (2011/4-1)

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

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., JORGENSEN U.G., LIEBIG C., MAIER G., MANCINI L., MASI G., MATHIASEN M., RAHVAR S., SCARPETTA G., SKOTTFELT J., SNODGRASS C., SOUTHWORTH J., TEUBER J., THOENE C.C., WAMBSGANSS J., ZIMMER F., ZUB M. and SURDEJ J.

Abstract (from CDS):

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. 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. 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. 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.

Abstract Copyright: ∼

Journal keyword(s): quasars: general - gravitational lensing: weak - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/528/A42): table5.dat table6.dat table7.dat>

CDS comments: Fig.1 reference stars R, S T and u not in Simbad.

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 [VV2006] J005027.8-174009 QSO 00 50 27.8233690104 -17 40 09.170215068           ~ 49 1
2 QSO B0142-100 QSO 01 45 16.5958283760 -09 45 17.265131352   17.23 16.95     ~ 242 1
3 4C 05.19 QSO 04 14 37.76734974 +05 34 42.3295956   24.100 23.800 21.270   ~ 360 2
4 [MKP2005] G25 G 04 38 13.723 -12 17 32.06     22.134   21.910 ~ 4 0
5 [MKP2005] G12 G 04 38 14.34 -12 17 10.6     21.182   21.158 ~ 9 0
6 [MKP2005] G21 G 04 38 14.43 -12 17 07.7     22.564   21.819 ~ 7 0
7 [MKP2005] G20 G 04 38 14.518 -12 17 00.49     23.946   22.776 ~ 4 0
8 [MKP2005] G23 G 04 38 14.594 -12 17 23.53     24.409   22.850 ~ 5 0
9 [MKP2005] G22 G 04 38 14.724 -12 17 18.20     22.253   21.260 ~ 15 1
10 [WSB2002] 0435-1223 C LeQ 04 38 14.73 -12 17 15.0     19.149   19.631 ~ 37 0
11 [WSB2002] 0435-1223 B LeQ 04 38 14.80 -12 17 13.8     19.082   19.623 ~ 41 0
12 [WSB2002] 0435-1223 D LeQ 04 38 14.84 -12 17 16.0     19.196   19.824 ~ 40 0
13 [VV2006] J043814.8-122314 QSO 04 38 14.88 -12 17 14.6     17.15     ~ 222 2
14 [WSB2002] 0435-1223 A LeQ 04 38 14.90 -12 17 14.4     18.545   19.106 ~ 39 0
15 [MKP2005] G24 G 04 38 15.046 -12 17 22.56     23.946   22.501 ~ 6 0
16 [VV2006] J203342.1-472343 QSO 20 33 42.12 -47 23 43.9           ~ 124 1
17 QSO J2240+0321 QSO 22 40 30.234 +03 21 30.63           ~ 675 1
18 Z 378-15 G 22 40 30.23447 +03 21 30.6290           ~ 632 0

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