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Issue A&A
Volume 382, Number 3, February II 2002
Page(s) L26 - L28
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20011798



A&A 382, L26-L28 (2002)
DOI: 10.1051/0004-6361:20011798

Letter

Discovery of a new quadruply lensed QSO: HS 0810+2554 - A brighter twin to PG 1115+080

D. Reimers1, H.-J. Hagen1, R. Baade1, S. Lopez2 and D. Tytler3

1  Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
2  Departemento Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile
3  Department of Physics and Center for Astrophysics and Space Sciences, University of California, San Diego, C-0424, La Jolla, CA 92093-0424

(Received 3 December 2001 / Accepted 16 December 2001 )

Abstract
We announce the probable discovery of a new very bright gravitationally lensed QSO, HS 0810+2554 ( z=1.50, V=15.3). The gravitational lens character has been discovered serendipitously by means of short (12 times 1 s) HST/STIS target acquisition images. The coadded images show a close bright double A ( V=16.0) and B (16.7) separated by 0 $\farcs$25 plus two fainter images C (17.4) and D (18.8). There is also evidence for a lens galaxy in the center of the images which is fainter than A by a factor of $\le$30 at 7150 Å. The image configuration resembles very much that of PG 1115+080 except that in HS 0810+2554 image splittings ( $\leq$ 1'') are smaller by a factor of ~2.5 and HS 0810+2554 is brighter by ~1m.


Key words: galaxies: quasars: individual HS 0810+2554 -- galaxies: quasars: general -- cosmology: gravitational lensing

Offprint request: D. Reimers, dreimers@hs.uni-hamburg.de

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© ESO 2002


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