Compass and Scale Image of Hercules A
Hercules A, Herc A, 3C 348
2.1 billion light-years (637 million parsecs or redshift z = 0.156)
The image was created from Hubble data from proposal 13065: S. Baum and C. O'Dea (Rochester Institute of Technology) and J. Stoke and F. Lo (Associated Universities, Inc.).
Notes:The VLA data are from the National Radio Astronomy Observatory observation project TDEM0011: R. Perley, W. Cotton, and U. Rao (NRAO/AUI/NSF). These data were taken August 2010 through September 2011. Frequencies 4-9 GHz were measured.
WFC3/UVIS: F606W (V) and F814W (I)
VLA: C Band Low (4-6 GHz), C Band High (6-8 GHz), and X Band Low (8-9 GHz)
This image is a composite of separate exposures acquired by Hubble's WFC3 instrument and the VLA. Several filters were used to sample various wavelengths/frequencies. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are:
Orange: F814W (I)
Blue: WFC3/UVIS F606W (V) + VLA X Band Low (8-9 GHz)
Green: VLA C Band High (6-8 GHz)
Red: VLA C Band Low (4-6 GHz)