NRAO: National Radio Astronomy Observatory

About this Image

Optical (visible-light) image of quasar PSS J2322+1944, made at the W.M. Keck Observatory, showing twin images indicating gravitational lensing (left). At right, a VLA image shows redshifted CO gas emission, revealing the "Einstein Ring" lens effect. The crosses in this image indicate locations of the optical quasar images.

Investigator(s):  Chris Carilli, Geraint Lewis, George Djorgovski, Pierre Cox, Alain Omont, Ashish Mahabal, Frank Bertoldi

Alternate Resolutions

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This image is available in the following downloadable versions:

• 593 x 278 color JPEG (VLA + Keck image)
• 222 x 222 color JPEG (VLA image)
• 800 x 600 color JPEG (Artist's concept)

If you would like to obtain a higher resolution version of this image, please contact Pat Smiley.

For More Information

• Read the Press Release
• Up one level for more info on Cosmology
• For unfamiliar terms, visit the NRAO Radio Astronomy Glossary

Technical Data

Telescope	ALMA
Date of Observation	2003-04-00
Type of Observation	Spectral Line Observations
Center of Image	RA: 22:23:7.20, Dec: 19:44:23.00 (J2000)
Field of View	0.0013 x 0.0013 degrees
Technical Caption



Astronomical database entries for PSS J2322 1944
• Query NED for images of PSS J2322 1944
• Query SIMBAD for more PSS J2322 1944 data

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