Science Highlight




Resubmission of unfinished Cycle 1 and 2 proposals for the Cycle 3 proposal review

Proposers of active Cycle 1 and Cycle 2 B- or C-graded projects should

consider that these projects may not be completed before the end of Cycle

2.  If they wish to observe the same targets in Cycle 3 they must specify

whether or not the cycle 3 observations will duplicate the former ones. If

so, the proposers must specify if the duplicating observations need to be

repeated in Cycle 3 even if they have been successfully completed by the

end of Cycle 2. Such repetition, if deemed necessary, must be

scientifically justified.


Cycle 2 observations will start again at the end of March with the array in

the compact configuration (C34-1/2), and will continue with observations

scheduled in blocks of two weeks followed by a week of EOC (Extension and

Optimization of Capabilities). During the two-week observation blocks,

24h/day observing runs will take place during the weekends. Array

re-configurations will mainly be done during the EOC weeks. The Cycle 2

tentative array reconfiguration schedule is as follows (note that changes

can be made due to unforeseen circumstances that prevent array

re-configurations such as snow storms etc.):


Numbers in parenthesis means that the configuration is expected to contain

sufficient baselines to approximate either configuration.  Due to the array

configuration schedule there are in particular a number of projects that

are unlikely to be observed:


1. High frequency projects (Bands 8, and 9) in the compact configurations

(C34-1 and C34-2) have a low chance to be observed during the remaining

time in April due to poor anticipated atmospheric conditions (see Figure 1

of the ALMA Proposer’s Guide).


2.  High frequency projects that can only be scheduled during daytime

(Bands 7, 8, and 9), regardless of configuration, are less likely to be

observed due to the poorer atmospheric stability, higher system

temperatures, and worse antenna pointing accuracy during the day.  The PIs

of the projects meeting these criteria will be contacted by their ARC

support personnel to suggest they resubmit their proposal for Cycle 3.