HAWC+ instrument

High-resolution Airborne Wideband Camera Plus (HAWC+)

Facility class Science Instrument
Principal Investigator:
Charles D. Dowell
NASA Jet Propulsion Laboratory (JPL)

HAWC+ is a far-infrared camera and imaging polarimeter. It is designed to allow total and polarized flux imaging in five broad bands between wavelengths of 50 μm and 240 μm. Diffraction-limited imaging yields spatial resolutions of ~5 – 20 arcseconds with fields of view ~2 – 10 arcminutes, respectively. HAWC+ utilizes three 31x40 pixel arrays: two for the reflective component and one for the transmitted component of linear polarization. The detectors are cooled by an adiabatic demagnetization refrigerator to an operating temperature of about 0.1 – 0.2 K. Commissioning observations started in late 2016, the instrument acceptance review was completed in late 2017, and has been available for Cycle 7 observations beginning in 2018.

Examples of HAWC+ scientific observations and summary of specifications: HAWC+ Flyer

Information applicable to the observing cycles can be found in their respective versions of the Observer's Handbook. Be sure that you are referencing the correct version of the handbook!

The HAWC+ Guest Observer (GO) Data Handbook describes HAWC+ data products, processing steps, calibration procedures, and known issues.

Primary Reference

Use when citing SOFIA/HAWC+ results.

"HAWC+, the Far-Infrared Camera and Polarimeter for SOFIA"
Harper et al., 2018, JAI, 7, 1840008-1025.
DOI: 10.1142/S2251171718400081; ADS Bibliographic Code: 2018JAI.....740008H

Additional References

"Far-infrared polarimetry from the Stratospheric Observatory for Infrared Astronomy"
Vaillancourt et al., 2007, ProcSPIE, 6678, 66780D.
DOI: 10.1117/12.730922 [pdf]

"A Two-Dimensional Semiconducting Bolometer Array for HAWC"
Voellmer et al., 2004, ProcSPIE, 5498, 428.
DOI: 10.1117/12.552016 [pdf]

"HAWC: A Far-infrared Camera for SOFIA"
Harper et al., 2000, ProcSPIE, 4014, 43.
DOI: 10.1117/12.389132 [pdf]