2017AJ....153..219S

Query : 2017AJ....153..219S

2017AJ....153..219S - Astron. J., 153, 219-219 (2017/May-0)

First lensed quasar systems from the VST-ATLAS survey: One quad, two doubles, and two pairs of lensless twins.

SCHECHTER P.L., MORGAN N.D., CHEHADE B., METCALFE N., SHANKS T. and McDONALD M.

Abstract (from CDS):

We have analyzed images from the VST-ATLAS survey to identify candidate gravitationally lensed quasar systems in a sample of WISE sources with W1-W2 0.7.
Result. from follow-up spectroscopy with the Baade 6.5 m telescope are presented for eight systems. One of them is a quadruply lensed quasar, and two are doubly lensed systems. Two are projected superpositions of two quasars at different redshifts. In one system, two quasars, although at the same redshift, have very different emission line profiles and constitute a physical binary. In two systems, the component spectra are consistent with the lensing hypothesis, after allowing for microlensing. However, as no lensing galaxy is detected in these two systems, we classify them as lensless twins. More extensive observations are needed to establish whether they are in fact lensed quasars or physical binaries.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): gravitational lensing: micro - gravitational lensing: strong - quasars: general - quasars: general

Nomenclature: Table 1: [SMC2017] WISE JHHMM+DDMM N=8, [SMC2017] WISE JHHMM+DDMM A N=16. Fig. 1, Table 2: [SMC2017] WISE J2344-3056 A (Nos A-D). Fig. 4, Table 3: [SMC2017] WISE J2304-2214 A (Nos A-B, G).

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 - 2026 		#notes
1 [SMC2017] WISE J0145-1327 LS? 01 45 25.3 -13 27 25           ~ 1 0
2 [ASM2018] A J0326-3122 LS? 03 26 06.8 -31 22 54           ~ 3 0
3 [SMC2017] WISE J1051-1142 LS? 10 51 41.9 -11 42 39           ~ 1 0
4 QSO B1104-181 QSO 11 06 33.3845199936 -18 21 23.829049296   15.8 15.9 15.7   ~ 338 1
5 [SMC2017] WISE J1427-0715 LS? 14 27 04.8 -07 15 56           ~ 1 0
6 [SMC2017] WISE J2215-3056 LS? 22 15 25.6 -30 56 35           ~ 1 0
7 [SMC2017] WISE J2304-2214 gLS 23 04 25.3 -22 14 46           ~ 1 0
8 [SMC2017] WISE J2304-2214 B LeQ 23 04 25.32 -22 14 44.8           ~ 1 0
9 [SMC2017] WISE J2304-2214 G gLe 23 04 25.34 -22 14 46.3           ~ 1 0
10 [SMC2017] WISE J2304-2214 A LeQ 23 04 25.35 -22 14 47.0           ~ 1 0
11 [SMC2017] WISE J2329-1258 gLS 23 29 57.9 -12 58 59           ~ 4 0
12 [SMC2017] WISE J2344-3056 D LeQ 23 44 16.93 -30 56 25.9           ~ 2 0
13 [SMC2017] WISE J2344-3056 C LeQ 23 44 16.95 -30 56 26.6           ~ 2 0
14 [SMC2017] WISE J2344-3056 A LeQ 23 44 17.00 -30 56 26.2           ~ 2 0
15 [SMC2017] WISE J2344-3056 gLS 23 44 17.0 -30 56 26           ~ 8 0
16 [SMC2017] WISE J2344-3056 B LeQ 23 44 17.02 -30 56 25.6           ~ 2 0
17 [SMC2017] WISE J2329-1258 A LeQ ~ ~           ~ 1 0
18 [SMC2017] WISE J2329-1258 B LeQ ~ ~           ~ 1 0

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