We propose a SPIRE FTS follow up of a newly discovered bright submm galaxy behind the Small Magellanic Cloud. The galaxy MMJ0107 was identified as a bright source at 1.1mm with AzTEC, with flux density of 43 mJy. There is no optical counterpart but the source is detected at radio (843 GHz), Spitzer-MIPS 24 m, Spitzer-IRAC, WISE and NIR (J,H,Ks bands) as well as with Herschel SPIRE and PACS. The best photometric redshift estimate locates the galaxy at redshift ~2.8 and the SPIRE bands are bright enough (above 200 mJy at 350 m) to allow spectroscopic follow up with the SPIRE Fourier-Transform Spectrometer. At this redshift, many of the ISM cooling lines will be within the FTS range: [CII] 157.7 m, [OIII] 88m, [NII] 122m, etc. These considerations make MMJ0107 one of the best targets for FIR and submm spectroscopic follow up with Herschel and the photometric properties and the total IR luminosity give us confidence that we will detect lines in the FTS spectrum. This will increase the number of high redshift star-forming galaxies with positive line detections, which will further increase our knowledge of the physical conditions of these putative high redshift star-forming galaxies.
Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.