Science Highlight




Science Verification: Long Baselines - SDP.81

Description / Details of the target

Target: SDP.81 / HATLAS J090311.6+003906 (J2000 09:03:11.61 +00:39:06.7) is a high-z (z~3), lensed, ultra-luminous starburst galaxy first detected in the Herschel-ATLAS Survey (Eales et al. 2010, PASP, 122, 499).

Spectral setup: an FDM spectral window on the H2O emission line in Band 6 at 244 GHz (987.9 GHz rest frequency), plus other spectral windows for continuum; an FDM spectral window on the CO J=5-4 line in Band 4 plus other spectral windows for continuum.

Example references: Omont et al. 2013, A&A, 551, 115.


Capabilities to be verified

10km baselines in Bands 4, 6 & 7. Demonstration of similar-resolution imaging at two frequencies (Bands 4 and 6) in a mixed mode spectral setup (demonstrating both spectral line and continuum.) Higher frequency (Band 7) observations at long baselines.



The target needs to have suitable comparison data in the literature and lie within the LST range required for observation during the campaign.



Observed. Data will be released on 17 February 2015.

An announcement will appear on the ALMA Science Portal prior to any Science Verification data being publicly released.