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ARO Proposal Submission Information


The Arizona Radio Observatory (ARO) solicits observing proposals for the ALMA Prototype 12-meter Telescope (12m) located on Kitt Peak, Arizona, and for the 10-meter Submillimeter Telescope (SMT) located on Mount Graham, Arizona, for the period October 15, 2019 – February 15, 2020.  Proposal candidates should submit up to three pages of scientific and technical justification (including figures, tables, and references) in addition to their Proposal Summary Sheet (download 2019B form here):

ARO Proposal Summary Sheet (PDF fillable format)

All proposal candidates are required to list on the 2019B Proposal Summary Sheet their requested observing blocks (the exact LST ranges to be scheduled and number of times to be repeated), dates on which they are not available to observe, and dates in which sources in those observing blocks are within the Sun-avoidance zone (45 degrees at the SMT, 10 degrees at the 12m). 

The 12m ALMA Prototype antenna currently supports dual-polarization sideband-separating (SBS) observations in three bands: 4mm (66 – 90 GHz), 3mm (84 – 116 GHz), and 1mm (211 – 275 GHz). Observations with the new 4mm and 1mm receivers are shared-risk for the 2019B season. The 12m control system supports dual-polarization in the same sideband or single-polarization in each sideband (“2 IF mode”; fixed 6.0 GHz IF frequency), position-switched, beam-switched, and OTF observations. Backend modes for the AROWS spectrometer may be found on the ARO Equipment Summary and Status sheet at:

The 10m SMT currently supports dual-polarization sideband-separating (SBS) observations at 1mm (211 – 280 GHz) and dual-polarization double sideband observations at 0.8mm (325 – 370 GHz). The SMT is the preferred site for 1mm observations. The SMT control system supports both dual-polarization ("2 IF mode") and dual-polarization + dual-sideband observations ("4 IF mode") with tunable IF from 4.5-7.5 GHz, for position-switched, beam-switched, and OTF observations. Proposal candidates should consult the ARO Equipment Summary and Status sheet for additional technical specifications:

Remote observing is available. Observers who plan to observe remotely must supply fixed IP address(es) of the computer(s) that will be used during observing on their Proposal Summary Sheet. For further information about remote observing and other operational questions, please contact Tom Folkers, ARO Software Engineer:

Proposals will be reviewed by the ARO TAC and scheduling of successful proposals will be done according to availability of the receivers requested.  The telescopes are expected to be available to the general astronomical community for a minimum of 10 percent of the scheduled time. Graduate student participation is especially encouraged. Institutions (or individuals) that wish to acquire longer commitments of time should contact Buell Jannuzi, Director:

Next deadline for proposals is 23:59 MST on August 29, 2019.

Proposals should be emailed in PDF format to: