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News Release Archive:

News Release 85 of 297

November 20, 2008 09:00 AM (EST)

News Release Number: STScI-2008-38

Hubble Resolves Puzzle about Loner Starburst Galaxy

Technical facts about this news release:

About the Object
Object Name: NGC 1569
Object Description: Dwarf Irregular Galaxy
Position (J2000): R.A. 04h 30m 49s
Dec. +64° 50' 52"
Constellation: Camelopardalis
Distance: 11 million light-years (3.4 megaparsecs)
Dimensions: This image is roughly 2.7 arcminutes (8,700 light-years or 2,700 parsecs) wide.
About the Data
Science Team: This image was created from HST data from proposals 8133: P. Shopbell (Caltech), R. Dufour (Rice University), D. Walter (South Carolina State University), and A. Wilson (University of Maryland); and 10885: A. Aloisi (STScI/ESA) et al. The science team includes: A. Aloisi (STScI/ESA), L. Angeretti (Astronomical Observatory of Bologna/INAF), F. Annibali and L. Greggio (Astronomical Observatory of Padua/INAF), A. Grocholski (STScI), E. Held (Astronomical Observatory of Padua/INAF), J. Mack (STScI), D. Romano (Astronomical Observatory of Bologna/INAF), M. Sirianni (STScI/ESA), M. Tosi (Astronomical Observatory of Bologna/INAF), and R. van der Marel (STScI).
Instruments/Filters: ACS: F658N (H-alpha+[N II]) and F606W (wide V) WFPC2: F502N ([O III]) and F487N (H-beta)
Exposure Date(s): September 1999, November 2006, and January 2007
About the Release
Release Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA), and A. Aloisi (STScI/ESA)
Release Date: November 20, 2008
Color: The image is a composite of separate exposures made by the ACS and WFPC2 instruments on the Hubble Space Telescope. Three filters were used to sample narrow-wavelength ranges. One filter was used to sample broad wavelengths. The color results from assigning different hues (colors) to each monochromatic image. In this case, the assigned colors are:
ACS F658N (H-alpha + [N II]) red
ACS F606W (wide V) green/cyan
WFPC2 F502N ([O III]) cyan
WFPC2 F487 (H-beta) blue
Orientation: Compass and Scale Images for NGC 1569