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This study compares the measured activation volumes in motor cortex as well as the fluctuation noise and off-resonance characteristics for 1-, 2-, and 4-shot spiral gradient-recalled echo blood oxygen level dependent contrast functional magnetic resonance imaging (fMRI) acquisitions, under conditions of constant resolution and scan time and with two readout(More)
A comparison study was performed of 3D and 2D spiral k-space fMRI techniques using BOLD contrast with a 4.25-min finger-tapping task paradigm. The 3D sequence uses the conventional 2D spiral technique in conjunction with Fourier phase encoding in the slice select direction. Characteristics that were compared included image appearances, signal-to-noise ratio(More)
We present observations of L1014, a dense core in the Cygnus region previously thought to be starless, but data from the Spitzer Space Telescope shows the presence of an embedded source. We propose a model for this source that includes a cold core, heated by the interstellar radiation field, and a low-luminosity internal source. The low luminosity of the(More)
Infrared images of the dark cloud core B59 were obtained with the Spitzer Space Telescope as part of the ''Cores to Disks'' Legacy Science project. Photometry from 3.6Y70 m indicates at least 20 candidate low-mass young stars near the core, more than doubling the previously known population. Out of this group, 13 are located within $0.1 pc in projection of(More)
We present maps of 7.78 square degrees of the Lupus molecular cloud complex at 24, 70, and 160µm. They were made with the Spitzer Space Telescope's Multiband Imaging Photometer for Spitzer (MIPS) instrument as part of the Spitzer Legacy Program, " From Molecular Cores to Planet-Forming Disks " (c2d). The maps cover three separate regions in Lupus, denoted(More)
We present the first interferometric polarization map of the W51 e1/e2 molecular cores obtained with the BIMA array at 1.3 mm wavelength with approximately 3 ′′ resolution. The polarization angle varies smoothly across the double cores with an average position angle of 23 • ±5 • for W51 e1 and 15 • ±7 • for W51 e2. The inferred magnetic field direction is(More)
We present maps of 14.4 deg 2 of the Ophiuchus dark clouds observed by the Spitzer Space Telescope Multiband Imaging Photometer for Spitzer (MIPS). These high-quality maps depict both numerous point sources and extended dust emission within the star-forming and nonYstar-forming portions of these clouds. Using PSF-fitting photometry, we detect 5779 sources(More)
One of the central goals of the Spitzer Legacy Project ''From Cores to Disks'' (c2d) is to determine the frequency of circumstellar disks around weak-line T Tauri stars (WTTSs) and to study the properties and evolutionary status of these disks. Here we present a census of disks for a sample of over 230 WTTSs located in the c2d IRAC and MIPS maps of the(More)
We present maps of 1.5 square degrees of the Serpens dark cloud at 24, 70, and 160µm observed with the Spitzer Space Telescope MIPS Camera. We describe the observations and briefly discuss the data processing carried out by the c2d team on these data. More than 2400 compact sources have been extracted at 24µm, nearly 100 at 70µm, and 4 at 160µm. We estimate(More)