CORMASS: A Compact and Efficient NIR Spectrograph for Studying Low-Mass Objects

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<14) including quasars, novae, and emission line objects.

To be published in Feb 2001 PASP, 19 pages, 12 Figures, High Resolution file can be retrieved from ftp://iras2.tn.cornell.edu/pub/wilson/papers/cormass.ps.gz

References in corpus (4)

• Sixty-seven Additional L Dwarfs Discovered by the Two Micron All Sky Survey (2MASS)
• L Dwarfs and the Substellar Mass Function
• Discovery of a Bright Field Methane (T-type) Brown Dwarf by 2MASS
• The Onset of Methane in L Dwarfs

Cited by in corpus (15)

• A Unified Near Infrared Spectral Classification Scheme for T Dwarfs
• The Spectra of T Dwarfs I: Near-Infrared Data and Spectral Classification
• Spectral Mapping Reconstruction of Extended Sources
• Characterizing Young Brown Dwarfs using Low Resolution Near-IR Spectra
• Three Wide-Separation L dwarf Companions from the Two Micron All Sky Survey: Gl 337C, Gl 618.1B, and HD 89744B
• Discovery of a Young Substellar Companion in Chamaeleon
• A 2MASS L Dwarf Companion to the Nearby K Dwarf GJ 1048
• Molecular and Ionic shocks in the Supernova Remnant 3C391
• A Survey for New Stars and Brown Dwarfs in the Ophiuchus Star-forming Complex
• Physical Conditions of Accreting Gas in T Tauri Star Systems
• Near-Infrared Synchrotron Emission from Cas A
• On the CO Near-IR Band and the Line Splitting Phenomenon in the Yellow Hypergiant Rho Cassiopeiae
• New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region
• Anomalous Accretion Activity and the Spotted Nature of the DQ Tau Binary System
• Interferometric Evidence for Resolved Warm Dust in the DQ Tau System