Showing papers by "Roger H. Hildebrand published in 2010"
TL;DR: In this paper, a summary of data obtained with the 350m polarimeter, Hertz, at the Caltech Submillimeter Observatory is presented, along with tabulated results and maps showing polarization vectors and intensity contours.
Abstract: We present a summary of data obtained with the 350 {mu}m polarimeter, Hertz, at the Caltech Submillimeter Observatory. We give tabulated results and maps showing polarization vectors and intensity contours. The summary includes over 4300 individual measurements in 56 Galactic sources and two galaxies. Of these measurements, 2153 have P {>=} 3{sigma} {sub p} statistical significance. The median polarization of the entire data set is 1.46%.
119 citations
TL;DR: In this article, a summary of data obtained with the 350 micron polarimeter, Hertz, at the Caltech Submillimeter Observatory is presented, along with tabulated results and maps showing polarization vectors and flux contours.
Abstract: We present a summary of data obtained with the 350 micron polarimeter, Hertz, at the Caltech Submillimeter Observatory. We give tabulated results and maps showing polarization vectors and flux contours. The summary includes over 4300 individual measurements in 56 Galactic sources and 2 galaxies. Of these measurements, 2153 have P >= 3\sigma_p statistical significance. The median polarization of the entire data set is 1.46%.
111 citations
01 Feb 2010
TL;DR: In this paper, a summary of data obtained with the 350 μm polarimeter, Hertz, at the Caltech Submillimeter Observatory is presented, along with tabulated results and maps showing polarization vectors and intensity contours.
Abstract: We present a summary of data obtained with the 350 μm polarimeter, Hertz, at the Caltech Submillimeter Observatory. We give tabulated results and maps showing polarization vectors and intensity contours. The summary includes over 4300 individual measurements in 56 Galactic sources and two galaxies. Of these measurements, 2153 have P ≥ 3σ_p statistical significance. The median polarization of the entire data set is 1.46%.
66 citations
California Institute of Technology1, University of Chicago2, University of Illinois at Urbana–Champaign3, Northwestern University4, Goddard Space Flight Center5, Ames Research Center6, University of Western Ontario7, University of Minnesota8, University of Wisconsin-Madison9, Universities Space Research Association10
TL;DR: In this article, a far-infrared polarimeter for the HAWC instrument on SOFIA has been presented, which uses quartz half-wave plates continuously rotating at 0.5 Hz and fixed wire-grid polarizers.
Abstract: We describe our ongoing project to build a far-infrared polarimeter for the HAWC instrument on SOFIA. Far-IR
polarimetry reveals unique information about magnetic fields in dusty molecular clouds and is an important
tool for understanding star formation and cloud evolution. SOFIA provides flexible access to the infrared as
well as good sensitivity to and angular resolution of continuum emission from molecular clouds. We are making
progress toward outfitting HAWC, a first-generation SOFIA camera, with a four-band polarimeter covering 50 to
220 microns wavelength. We have chosen a conservative design which uses quartz half-wave plates continuously
rotating at ~0.5 Hz, ball bearing suspensions, fixed wire-grid polarizers, and cryogenic motors. Design challenges
are to fit the polarimeter into a volume that did not originally envision one, to minimize the heating of the
cryogenic optics, and to produce negligible interference in the detector system. Here we describe the performance
of the polarimeter measured at cryogenic temperature as well as the basic method we intend for data analysis.
We are on track for delivering this instrument early in the operating lifetime of SOFIA.
34 citations