UC Santa Barbara

Advancements in CMB research has brought about not only a new age of precision cosmology, but also galactic astrophysics. WMAP has uncovered some tantalizing questions about the nature of dust emission in the galaxy, and has provided glimpses of a potentially new mechanism for energizing cosmic rays in the region around the center of the galaxy. The LATTE telescope has a single 9GHz receiver, Dicke switch radiometer operating at 30Hz, with a proven temperature uncertainty of under 10mK per switch cycle. The high sensitivity is due to a low noise cryogenic HEMT amplifier and a low loss cryogenic PIN diode switch. Using the optical design of the BEAST experiment, LATTE maps the microwave sky with an angular resolution of about 1.5 degrees covering about half the sky in one 24 hour period. In this document the expected and actual performance are reviewed, and preliminary pseudo-maps are presented.