J. O. Gundersen

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A ground-based polarimeter, PIQUE, operating at 90 GHz has set a new limit on the magnitude of any polarized anisotropy in the cosmic microwave background. The combination of the scan strategy and full width half maximum beam of 0. 235 gives broad window functions with 〈lE〉 = 211 −146 and 〈lB〉 = 212 −135 for the Eand B-mode window functions, respectively. A(More)
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a suborbital surveying experiment designed to study the evolutionary history and processes of star formation in local galaxies (including the Milky Way) and galaxies at cosmological distances. The BLAST continuum camera, which consists of 270 detectors distributed between three arrays,(More)
We describe a map-making method which we have developed for the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) experiment, but which should have general application to data from other submillimeter arrays. Our method uses a Maximum Likelihood based approach, with several approximations, which allows images to be constructed using large amounts(More)
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) operated successfully during a 100 hr flight from northern Sweden in 2005 June (BLAST05). As part of the calibration and pointing procedures, several compact sources were mapped, including solar system, Galactic, and extragalactic targets, specifically Pallas, CRL 2688, LDN 1014, IRAS(More)
We update the limit from the 90 GHz Princeton IQU Experiment ground-based polarimeter on the magnitude of any polarized anisotropy of the cosmic microwave radiation. With a second year of data, we have now limited both Q and U on a ring of 1 radius. The window functions are broad: for E-mode polarization, the effective l is . We find that the E-mode signal(More)
We present results from two observations of the cosmic microwave background (CMB) performed from the South Pole during the 1993-1994 austral summer. Each observation employed a 3◦ peak to peak sinusoidal, single difference chop and consisted of a 20◦ × 1◦ strip on the sky near our SP91 observations. The first observation used a receiver which operates in 3(More)
The cosmic microwave background (CMB) is one of only a few physically observable remnants of the early Universe. Studies of the spectrum, polarization and spatial distribution of the CMB can potentially lead to a detailed understanding of the processes that took place in the early Universe. Many of the outstanding cosmological questions regarding the age,(More)
We present polarization observations of two Galactic plane fields centered on Galactic coordinates (l, b) = (0◦, 0◦) and (329◦, 0◦) at Q(43 GHz) and W-band (95 GHz), covering between 301 and 539 square degrees depending on frequency and field. These measurements were made with the QUIET instrument between 2008 October and 2010 December, and include a total(More)
We present polarization measurements of extragalactic radio sources observed during the cosmic microwave background polarization survey of the Q/U Imaging Experiment (QUIET), operating at 43GHz (Q-band) and 95GHz (W-band). We examine sources selected at 20GHz from the public, >40mJy catalog of the Australia Telescope (AT20G) survey. There are ∼480 such(More)
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a sub-orbital experiment designed to study the process of star formation in local galaxies (including the Milky Way) and in galaxies at cosmological distances. Using a 2 m Cassegrain telescope, BLAST images the sky onto a focal plane, which consists of 270 bolometric detectors split between(More)