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News Release Archive:

News Release 5 of 37

November 17, 2005 01:00 PM (EST)

News Release Number: STScI-2005-32

Hubble, Sloan Quadruple Number of Known Optical Einstein Rings

Technical facts about this news release:

About the Object

Object Names: "SDSS ..."	RA (J2000):	Dec (J2000):	Observation Dates:	Redshift Forground Object (z_FG)	Redshift Background Object (z_BG)
J073728.44+3216	07 37 28.44	+32 16 18.7	9/21/04	0.3223	0.5812
J095629.78+5100	09 56 29.78	+51 00 6.4	10/30/04	0.131	0.467
J120540.44+4910	12 05 40.44	+49 10 29.4	3/8/05	0.215	0.4808
J125028.26+5234	12 50 28.26	+05 23 49.1	3/12/05	0.2318	0.7946
J140228.22+6321	14 02 28.22	+63 21 33.3	8/4/04	0.2046	0.4814
J162746.45–5357	16 27 46.45	–00 53 57.6	3/20/05	0.2076	0.5241
J163028.16+4520	16 30 28.16	+45 20 36.3	10/4/04	0.2479	0.7933
J232120.93–9391	23 21 20.93	–09 39 10.3	9/6/2004	0.0819	0.5324

Object Description:

Einstein Ring Gravitational Lenses

About the Data

Data Description:	The Hubble image was created from HST data from proposal 10174. Members of the SLACS team include: A. Bolton (Harvard-Smithsonian CfA), S. Burles (Massachusetts Institute of Technology), L. Koopmans (Kapteyn Astronomical Institute), T. Treu (University of California - Santa Barbara), and L. Moustakas (Jet Propulsion Lab/Caltech).
Instrument:	ACS/WFC
Filters:	F435W (B) and F814W (I)
Dimensions/Scale:	Each image is 8 arcseconds wide.
Total Exposure Time:	1.9 hours

About the Image

Image Credit:	NASA, ESA, A. Bolton (Harvard-Smithsonian CfA) and the SLACS Team
Release Date:	November 17, 2005
Orientation: