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News Release Archive:

News Release 357 of 954

August 17, 2006 02:00 PM (EDT)

News Release Number: STScI-2006-37

Hubble Sees Faintest Stars in a Globular Cluster

Technical facts about this news release:

About the Object
Object Name: NGC 6397
Object Description: Globular Cluster
Position (J2000): R.A. 17h 40m 41s.36
Dec. -53° 40' 25".3
Constellation: Ara
Distance: 8,500 light-years (2.6 kiloparsecs)
About the Data
Data Description:

This image was created from HST data from proposals 10424: H. Richer (University of British Columbia), P. Guhathakurta (University of California, Santa Cruz), R.M. Rich (University of California, Los Angeles), J. Anderson (Rice University), G. Fahlman (National Research Council/Herzberg Institute of Astrophysics, Canada), B. Gibson (Swineburne University of Technology), B. Hansen (University of California, Los Angeles), J. Hurley (Monash University, Australia), J. Kalirai (University of California, Santa Cruz), I. King (University of Washington, Seattle), M. Shara (American Museum of Natural History), and P. Stetson (National Research Council/Herzberg Institute of Astrophysics, Canada).

The science team comprises H. Richer (University of British Columbia), J. Anderson (Rice University), J. Brewer and S.Davis (University of British Columbia), G. Fahlman (National Research Council/Herzberg Institute of Astrophysics, Canada), B. Hansen (University of California, Los Angeles), J. Hurley (Monash University, Australia), J. Kalirai (University of California, Santa Cruz), I. King (University of Washington, Seattle), D. Reitzel (University of California, Los Angeles), R.M. Rich (University of California, Los Angeles), M. Shara (American Museum of Natural History), and P. Stetson (National Research Council/Herzberg Institute of Astrophysics, Canada).

Instrument: ACS/WFC
Exposure Date(s): March and April, 2005
Exposure Time: 4.7 days
Filters: F606W(V) and F814W(I)
About the Image
Image Credit: NASA, ESA, and H. Richer (University of British Columbia)
Release Date: August 17, 2006
Color

This image is a composite of many separate exposures made by the ACS instrument on the Hubble Space Telescope using several different filters. Three filters sample broad wavelength ranges, one isolates the light of hydrogen. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:

F814W (I) red
F606W (V) blue

Orientation/Scale: Globular Cluster NGC 6397