This colliding pair of galaxies is a region of vigorous star formation which has been investigated for many years. Since 1990, four supernova explosions have been seen optically in Arp 299. Observations with the Very Large Array (VLA) showed a region near the nucleus of one of the colliding galaxies which had all the earmarks of prolific star formation. Observations with the Very Long Baseline Array (VLBA) and the Green Bank Telescope (GBT) in 2002 and 2003 led to the discovery of 5 supernovae concentrated in this region. In this image, the radio data (in pink) have been merged with a visible light image of the pair from the Hubble Space Telescope.
Credit: B. Saxton from data provided by J. Ulvestad, S. Neff & S. Teng; NRAO/AUI/NSF and NASA/ESA HST
Technical Details Telescope: VLA; HST; HST; HST Band: L; V; B; R Date: 1991-11-29; -; 2008-01-01T11:00:53; 2008-01-01T11:01:36 Center: RA: 11:28:31.57, Dec: 58:02:16.11 Field of View: 1.6 x 1.6 arcminutes