2000AJ....120.2868W

Query : 2000AJ....120.2868W

2000AJ....120.2868W - Astron. J., 120, 2868-2878 (2000/December-0)

PMN J1838-3427: a new gravitationally lensed quasar.

WINN J.N., HEWITT J.N., SCHECHTER P.L., DRESSLER A., FALCO E.E., IMPEY C.D., KOCHANEK C.S., LEHAR J., LOVELL J.E.J., McLEOD B.A., MORGAN N.D., MUNOZ J.A., RIX H.-W. and RUIZ M.T.

Abstract (from CDS):

We report the discovery of a new double-image quasar that was found during a search for gravitational lenses in the southern sky. Radio source PMN J1838-3427 is composed of two flat-spectrum components with separation 1".0, flux density ratio 14:1, and matching spectral indices in VLA and VLBA images. Ground-based BRI images show the optical counterpart (total I=18.6) is also double, with the same separation and position angle as the radio components. An HST/WFPC2 image reveals the lens galaxy. The optical flux ratio (27:1) is higher than the radio value, probably because of differential extinction of the components by the lens galaxy. An optical spectrum of the bright component contains quasar emission lines at z=2.78 and several absorption features, including prominent Lyα absorption. The lens galaxy redshift could not be measured, but it is estimated to be z=0.36±0.08. The image configuration is consistent with the simplest plausible models for the lens potential. The flat radio spectrum and observed variability of PMN J1838-3427 suggest that the time delay between flux variations of the components is measurable and could thus provide an independent measurement of H0.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Distance Scale - Cosmology: Gravitational Lensing - quasars: individual (PMN J1838-3427)

Nomenclature: Table 4: [WHS2000] PMN J1838-3427A (Nos A-B), [WHS2000] A (Nos G, S), [WHS2000] a (Nos p, q). Table 6: [WHS2000] NN (Nos 1-12).

Simbad objects: 14

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Number of rows : 14
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 PG 0918+029 HS* 09 21 28.2138172968 +02 46 02.254084824 11.975 13.056 13.327 13.456 13.615 sdB1VIIHe6 118 0
2 8C 0958+561 QSO 10 01 20.6918953728 +55 53 55.593949272   17.16 16.95     ~ 757 3
3 PG 1323-086 HS* 13 25 39.4669501176 -08 49 19.067387484 12.660 13.341 13.481 13.529 13.608 sdB3IHe8 144 1
4 NVSS J160914+653229 rG 16 09 13.93704 +65 32 27.9024     19.4     ~ 215 0
5 [WHS2000] 8 * 18 38 27.59 -34 27 35.7   19.54       ~ 2 0
6 [WHS2000] PMN J1838-3427B LeQ 18 38 28.490 -34 27 42.60           ~ 3 0
7 [WHS2000] G G 18 38 28.495 -34 27 42.50           ~ 2 0
8 [VV2006] J183828.7-342733 QSO 18 38 28.4967892128 -34 27 41.764115592     19.21     ~ 43 2
9 [WHS2000] PMN J1838-3427A LeQ 18 38 28.50 -34 27 41.6           ~ 3 0
10 [WHS2000] 6 * 18 38 30.50 -34 27 28.3     19.271     ~ 2 0
11 [WHS2000] 5 * 18 38 30.62 -34 27 03.6     18.915     ~ 2 0
12 [WHS2000] 4 * 18 38 31.34 -34 27 46.3     19.551     ~ 2 0
13 SA 110-499 * 18 43 07.6616255640 +00 28 01.482501432 13.363 12.724 11.737 11.137 10.464 B9 17 0
14 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2

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