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MUSTANG-2 overview, requirements

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Hello current and future MUSTANG-2 proposer!

Instrument overview

MUSTANG-2 is a 223-feedhorn bolometer (continuum) camera with a bandpass from 75 to 105 GHz. The full bandpass is available here.

MUSTANG-2 is inherently a mapping instrument and observes by scanning “on-the-fly” (OTF). Our most common scan pattern is that of a Lissajous Daisy that can observe objects from our resolution (9″) to several arcminutes in size. For scans of ~a degree, we have switched to a raster scan. If you would like to consider another mapping strategy, please contact a member of the MUSTANG-2 instrument team to inquire about it. The instantaneous field of view (FOV) is just over 4 arcminutes (4.2′).

Proposal requirements

All MUSTANG-2 proposals are shared-risk and must be approved by the MUSTANG-2 instrument team. Furthermore, the MUSTANG-2 instrument team must be included as co-investigators on the proposal. Conversely, the MUSTANG-2 team will reduce the data and provide appropriate data products (principally a calibrated map, transfer function, and beam characterization) to the proposal team. End-to-end data reduction is currently fairly involved. We will work to provide documentation on data processing and hope to eventually allow proposers to process their own data.

MUSTANG-2 instrument team

The instrument team currently consists of:

  • Charles Romero
  • Simon Dicker
  • Brian Mason
  • Mark Devlin
  • Tony Mroczkowski
  • Jonathan Sievers
  • Craig Sarazin
  • Ian Lowe
  • Tanay Bhandarkar
  • Emily Moravec

Contact

Please contact Charles Romero at cromero -at- nrao -dot- edu or Brian Mason at bmason -at- nrao -dot- edu for inquiries.

Overhead, observing constraints

  • The overhead for MUSTANG-2 is dominated by initial setup and calibration. We generally recommend a minimum session length of 2 hours. Proposals should quote an observing efficiency of 50% (or 100% overheads relative to on-target time).

Other requirements

The MUSTANG-2 team will principally focus on the technical feasibility of a proposal and make suggestions accordingly. The technical justification on a proposal should reference publicly available mapping speeds, e.g. from MUSTANG_2 mapping speeds memo. The GBT sensitivity calculator does not currently incorporate MUSTANG-2 mapping speeds.