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Your search keyword '"M. F. Skrutskie"' showing total 3 results
Start Over Author "M. F. Skrutskie" Journal publications of the astronomical society of the pacific
3 results on '"M. F. Skrutskie"'

1. CorMASS: A Compact and Efficient Near‐Infrared Spectrograph for Studying Low‐Mass Objects

Author

John C. Wilson, J. R. Houck, J. D. T. Smith, David G. Monet, A. T. Enos, John E. Gizis, Chuck Henderson, M. F. Skrutskie, and Michael Colonno

Subjects
Physics, media_common.quotation_subject, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Stellar classification, law.invention, Telescope, Space and Planetary Science, Sky, Observatory, law, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Prism, Emission spectrum, Spectrograph, Astrophysics::Galaxy Astrophysics, media_common
Abstract

CorMASS (Cornell Massachusetts Slit Spectrograph) is a compact, low-resolution (R=300), double-pass prism cross-dispersed near-infrared (NIR) spectrograph in operation on the Palomar Observatory 60-inch telescope. Its 2-dimensional spectral format provides simultaneous coverage from lambda ~ 0.75 microns to lambda ~ 2.5 microns (z'JHK bands). A remotely operated cold flip mirror permits its NICMOS3 detector to function as a K_s slit viewer to assist object placement into the 2 arcsec x 15 arcsec slit. CorMASS was primarily designed for the rapid spectral classification of low-mass stellar and sub-stellar objects identified by the Two-Micron All Sky Survey (2MASS). CorMASS' efficiency and resolution also make it a versatile instrument for the spectral observation and classification of many other types of bright objects (K

Published
2001

2. The Discovery of a Low‐Redshift, Red Quasar in the 2MASS Prototype Survey

Author

M. F. Skrutskie, Harding E. Smith, Roc M. Cutri, C. A. Beichman, Davy Kirkpatrick, T. Chester, and Carol J. Lonsdale

Subjects
Physics, education.field_of_study, media_common.quotation_subject, Population, Astronomy, Astronomy and Astrophysics, Quasar, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Redshift survey, Redshift, Stars, Space and Planetary Science, Sky, education, Astrophysics::Galaxy Astrophysics, Data reduction, Visible spectrum, media_common
Abstract

A prototype camera designed to test the observing and data reduction techniques for the 2 Micron All Sky Survey (2MASS) has been used to search for extremely red objects. Selection criteria based on the combination of near-IR and visible light observations help separate the vast majority of ordinary stars from more exotic objects. Visible spectroscopic observations for objects selected using these criteria in an area of just a few tenths of a square degree has resulted in the discovery of a quasar with a redshift of 0.147. The number of quasars expected at Ks in the 2MASS survey based on typical quasar colors and on the surface density of optically selected samples is ~0.17 deg–2. The 2MASS survey will result in a sample of quasars relatively unbiased by the presence of dust and will allow a reliable determination of whether there is a significant population of quasars with internal dust absorption.

Published
1998

3. The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs.

Author

J. C. Wilson, F. R. Hearty, M. F. Skrutskie, S. R. Majewski, J. A. Holtzman, D. Eisenstein, J. Gunn, B. Blank, C. Henderson, S. Smee, M. Nelson, D. Nidever, J. Arns, R. Barkhouser, J. Barr, S. Beland, M. A. Bershady, M. R. Blanton, S. Brunner, and A. Burton

Subjects
GIANT stars, GALACTIC evolution, SPECTROGRAPHS
Abstract

We describe the design and performance of the near-infrared (1.51–1.70 μm), fiber-fed, multi-object (300 fibers), high resolution (R = λ/Δλ ∼ 22,500) spectrograph built for the Apache Point Observatory Galactic Evolution Experiment (APOGEE). APOGEE is a survey of ∼105 red giant stars that systematically sampled all Milky Way populations (bulge, disk, and halo) to study the Galaxy’s chemical and kinematical history. It was part of the Sloan Digital Sky Survey III (SDSS-III) from 2011 to 2014 using the 2.5 m Sloan Foundation Telescope at Apache Point Observatory, New Mexico. The APOGEE-2 survey is now using the spectrograph as part of SDSS-IV, as well as a second spectrograph, a close copy of the first, operating at the 2.5 m du Pont Telescope at Las Campanas Observatory in Chile. Although several fiber-fed, multi-object, high resolution spectrographs have been built for visual wavelength spectroscopy, the APOGEE spectrograph is one of the first such instruments built for observations in the near-infrared. The instrument’s successful development was enabled by several key innovations, including a “gang connector” to allow simultaneous connections of 300 fibers; hermetically sealed feedthroughs to allow fibers to pass through the cryostat wall continuously; the first cryogenically deployed mosaic volume phase holographic grating; and a large refractive camera that includes mono-crystalline silicon and fused silica elements with diameters as large as ∼400 mm. This paper contains a comprehensive description of all aspects of the instrument including the fiber system, optics and opto-mechanics, detector arrays, mechanics and cryogenics, instrument control, calibration system, optical performance and stability, lessons learned, and design changes for the second instrument. [ABSTRACT FROM AUTHOR]

Published
2019
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