2005A&A...440...53G

Query : 2005A&A...440...53G

2005A&A...440...53G - Astronomy and Astrophysics, volume 440, 53-58 (2005/9-2)

Microlensing in the double quasar SBS1520+530.

GAYNULLINA E.R., SCHMIDT R.W., AKHUNOV T., BURKHONOV O., GOTTLOEBER S., MIRTADJIEVA K., NURITDINOV S.N., TADJIBAEV I., WAMBSGANSS J. and WISOTZKI L.

Abstract (from CDS):

We present the results of a monitoring campaign of the double quasar SBS1520+530 at Maidanak observatory from April 2003 to August 2004. We obtained light curves in V and R filters that show small-amplitude Δm≃0.1 mag intrinsic variations of the quasar on time scales of about 100 days. The data set is consistent with the previously determined time delay of Δt=(130±3) days by Burud et al. (2002A&A...391..481B). We find that the time delay corrected magnitude difference between the quasar images is now larger by (0.14±0.03) mag than during the observations by Burud et al. (2002A&A...391..481B). This confirms the presence of gravitational microlensing variations in this system.

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Journal keyword(s): gravitational lensing - dark matter - quasars: individual: SBS 1520+530 - cosmology: observations

VizieR on-line data: <Available at CDS (J/A+A/440/53): table1.dat table2.dat>

Simbad objects: 8

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Number of rows : 8
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 USNO-A2.0 1425-08285313 * 15 21 41.4744395472 +52 55 58.673961120           ~ 2 0
2 [CVS97] NW * 15 21 44.63 +52 54 49.5   20.17 19.49     ~ 7 0
3 QSO B1520+530 QSO 15 21 44.8 +52 54 49   18.2       ~ 122 2
4 [CVS97] A LeI 15 21 44.91 +52 54 48.7   18.61 18.17     ~ 21 0
5 [CSB98] G G 15 21 45.03 +52 54 48.3           ~ 22 1
6 [CVS97] B LeI 15 21 45.11 +52 54 48.6   18.89 18.70     ~ 21 0
7 [CVS97] SE * 15 21 45.29 +52 54 46.0     21.5     ~ 7 0
8 USNO-A2.0 1425-08285587 * 15 21 46.5241018992 +52 55 10.160286240           ~ 2 0

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