Share

News Release Archive:

News Release 294 of 947

October 4, 2007 02:00 PM (EDT)

News Release Number: STScI-2007-38

Astronomers Use Hubble and Keck to Identify Dwarf Galaxy

Technical facts about this news release:

About the Object
Object Name: SDSS J0737+3216, SLACS J0737+3216
Object Description: Gravitational Lens System
Position (J2000): R.A. 07h 37m 28s.44
Dec. +32° 16' 18".47
Constellation: Gemini
Distance: The background source that is being lensed has a distance of 6 billion light-years (1.8 billion parsecs).
Redshift: The foreground lensing object is at a redshift z = 0.3223; the background source that is being lensed has a redshift z = 0.5812.
About the Data
Data Description:

The Hubble image was created from HST data from proposal 10494: L. Koopmans (Kapteyn Astronomical Institute), T. Treu (University of California, Santa Barbara), A. Bolton (Institute for Astronomy/University of Hawaii), S. Burles (Massachusetts Institute of Technology), and L. Moustakas (Jet Propulsion Laboratory).

The science team includes P. Marshall and T. Treu (University of California, Santa Barbara), J. Melbourne (U.C.O./Lick Observatory/Center for Adaptive Optics, University of California, Santa Cruz), R. Gavazzi (University of California, Santa Barbara), K. Bundy (University of Toronto), M. Ammons (U.C.O./Lick Observatory/Center for Adaptive Optics, University of California, Santa Cruz), A. Bolton (Institute for Astronomy/University of Hawaii), S. Burles (Massachusetts Institute of Technology), J. Larkin (University of California, Los Angeles), D. Le Mignant (W. M. Keck Observatory; Center for Adaptive Optics, University of California, Santa Cruz), D. Koo (U.C.O./Lick Observatory University of California, Santa Cruz), L. Koopmans (Kapteyn Astronomical Institute), and C. Max (U.C.O./Lick Observatory/Center for Adaptive Optics, University of California, Santa Cruz).

Instrument: Hubble: ACS/WFC Hubble: NICMOS/NIC2 Keck II/ LGSAO
Exposure Date(s): November 5, 2006 November 5, 2006 December 11, 2006
Exposure Time: 75 minutes 43 minutes 52 minutes
Filters: F555W (V) and F814W (I) F160W K’-band with the near-infrared camera (NIRC2)
About the Image
Image Credit: NASA, ESA, and P. Marshall and T. Treu (University of California, Santa Barbara)
Release Date: October 4, 2007