First Light with new JCMT receiver `Ala`ihi

G34.3 is an Ultracompact HII region that has an associated molecular cloud. This was the target for the JCMT’s first light image taken with the Nāmakanui* insert `Ala`ihi. `Ala`ihi is unique at the JCMT in that is is a new frequency range for JCMT, operating between 77.0–88.5GHz. `Ala`ihi’s primary function at the JCMT will be for use with VLBI observations (and is a dual polarization, 1-sideband mixer).

This first light image taken of G34.3 in HCO+ (1-0) at 89.2GHz was obtained on the night of November 9th (20221110 UT).

These data were eagerly anticipated by observatory staff who are currently preparing for the first observations for JCMT as part of the East Asian VLBI Network (EAVN) later this month.


*Nāmakanui (an 86, 230 and 345 GHz instrument) was built by a team at ASIAA (Taiwan) and is on loan the to the JCMT as a spare for the GLT

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