The discovery of methanimine in Arp 220 with the Arecibo telescope was publicly announced at the AAS meeting in Austin, TX, on January 11, 2007.
The story has been picked up by a number of news outlets around the world. A selection of english-language coverage is given below::
A more comprehensive list of on-line coverage can be found here.
The discovery has already been the subject of three scientific papers at two conferences. A journal paper has been submitted to the Astronomical Journal, where it is currently being refereed.
Composite image: R. Minchin/NAIC from an original photo by J. Acevedo/NAIC