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Cycle 6 Call for Proposals - LWA1 Radio Observatory


May 1, 2015

We invite applications for observing time with the LWA1 Radio Observatory. At this call the first station of the Long Wavelength Array (LWA1) is operational and offers up to four independently-steerable wide-band beams and two all-dipole modes. Each beam supports two independent tunings over the LWA1 frequency range from 10 to 88 MHz with a FWHM ranging from 15 to 2 degrees (for more details consult the LWA1 Technical and Observational Information). We expect to schedule approximately 1500 beam-hours between December 15, 2015 and September 15, 2016. A list of projects previously observed and a list of collaborations can be found at:∼lwa/obssched.html. Observations will have a proprietary period of 1 year from the date of observation. LWA1 is a compact array radio telescope operating in the 10-88 MHz band, colocated with the VLA in central New Mexico. LWA1 currently consists of 257 dual-polarization active dipole antennas in a 100 m x 110 m elliptical footprint with an outlier dipole antenna located approximately 300-m east of the main array. Each dipole is individually digitized and then formed into 4 beams using a delay- and-sum technique. The beams can be pointed independently; thus LWA1 can be used similarly to 4 separate radio telescopes. The individual dipole signals can also be recorded. A subset of LWA1 science targets includes pulsars, astrophysical transients, the Sun, Jupiter, and the ionosphere, but innovative, technically feasible investigations of all kinds are welcomed. Support for operations and continuing development of the LWA1 is provided by the National Science Foundation under grant AST-1139974 of the University Radio Observatory program. We invite proposals from all communities wishing to use this new instrument. For more information on the LWA1 and its capabilities see:


The proposal cover page exists in Word or PDF format. In addition to the cover page, proposals should contain a maximum of 3 pages of text describing the project, and one additional page with figures if needed. The proposal must address the following: If applicable, the proposal should also describe:

Proposal deadline

The proposals should be submitted to by midnight MDT Sept. 4, 2015. The proposals will be reviewed by the LWA1 Time Allocation Committee (TAC) and announcement of time allocations is expected by November 16, 2015.

Proposal Evaluation

The TAC will grade each science team project based on scientific merit and technical feasibility. The TAC consists of the Director, Associate Director, the Chief Scientist, the Head of User Programs, and 5 external members representing the user community. The TAC will rank each proposal by a numerical score, and will then group proposals into three categories:

A: Highest priority project, most likely to be scheduled.
B: Medium priority project, likely to be scheduled at least in part.
C: Standby project, scheduling will depend on instrument availability.

There will be no guarantees for observing time. The LWA1 is still undergoing commissioning and all observations will be conducted on a “shared-risk” basis. Known issues with the station are documented at

Publication policy

All science team project members are expected to abide by the LWA publication policy, and explicitly state their compliance with the policy in the proposal. It is the responsibility of the PI to make sure that all members of his/her team have read and agreed to the policy. The publication policy is posted at:∼lwa/project.html


For questions regarding this call for proposals, please email

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