Spectral Irradiance Calibration in the Infrared. XIV. The Absolute Calibration of 2MASS

By Marvin L. Cohen, W. Wheaton, S. Megeath. 2003

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Element by element, we have combined the optical components in the three cameras of the Two Micron All Sky Survey (2MASS), and incorporated detector quantum efficiency curves and site-specific atmospheric transmissions, to create three relative spectral response curves (RSRs). We provide the absolute 2MASS attributes associated with "zero magnitude" in the JHKs bands so that these RSRs may be used for synthetic photometry. The RSRs tie 2MASS to the "Cohen-Walker-Witteborn" framework of absolute photometry and stellar spectra for the purpose of using 2MASS data to support the development of absolute calibrators for the Infrared Array Camera and pairwise cross-calibrators between all three SIRTF instruments. We examine the robustness of these RSRs to changes in water vapor within a night. We compare the observed 2MASS magnitudes of 33 stars (converted from the precision optical calibrators of Landolt and Carter-Meadows into absolute infrared calibrators from 1.2 to 35 μm) with our predictions, thereby deriving 2MASS "zero-point offsets" from the ensemble. These offsets are the final ingredients essential to merge 2MASS JHKs data with our other absolutely calibrated bands and stellar spectra, and to support the creation of faint calibration stars for SIRTF.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/fde8bec76dd286c0d71c8d93259e13146e7e9b18

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Citations in the corpus

STELLAR DIAMETERS AND TEMPERATURES. I. MAIN-SEQUENCE A, F, AND G STARS (2011, methodology): “3This sequence of calibrator - object - calibrator is called a “bracket” 4http://nexsciweb.ipac.caltech.edu/gcWeb/gcWeb.jsp 5Transformations from UBV , uvby, and JHK magnitude to flux were made using the relations described in Colina et al. (1996); Gray (1998); Cohen et al. (2003), respectively.”
HOW TO CONSTRAIN YOUR M DWARF: MEASURING EFFECTIVE TEMPERATURE, BOLOMETRIC LUMINOSITY, MASS, AND RADIUS (2015, methodology): “Photometric magnitudes were converted to fluxes using the zero points from Cohen et al. (2003) for 2MASS, Jarrett et al. (2011) for WISE, and Mann & von Braun (2015) for all other photometry.”
THE DATA REDUCTION PIPELINE FOR THE APACHE POINT OBSERVATORY GALACTIC EVOLUTION EXPERIMENT (2015, background): “The correction factor can be calculated with, cabs = Fλ,010 −H/2.5/MEDIAN(Si) (2) where Fλ,0 is the 2MASS zero-point for isophotal monochromatic light (1.33×10−13 W/cm2/µm) for a 0th magnitude star in the H-band (Cohen et al. 2003)25.”
SN 2008ha: AN EXTREMELY LOW LUMINOSITY AND EXCEPTIONALLY LOW ENERGY SUPERNOVA (2009, methodology): “J- and H-band (1.2 and 1.6 µm; Cohen et al. 2003) images were acquired simultaneously with the three NICMOS3 arrays with individual exposure times of 7.8 s.”
Calibration of Synthetic Photometry Using DA White Dwarfs (2005, methodology): “…BG04, we use the Landolt (1992a, 1992b) JohnsonKron-Cousins Cerro Tololo Inter-American Observatory filter response functions, as modified for atmospheric transmission by Cohen et al. (2003a), and directly compute the synthetic UBVRI magnitudes for both Vega and the four primary HST flux standards.”
The Two Micron All Sky Survey (2MASS) (2006, methodology): “Photometric zero points and absolute calibration of 2MASS are described in Cohen et al. (2003).”
Spectroscopic parameters for 451 stars in the HARPS GTO planet search program - Stellar [Fe/H] and the frequency of exo-Neptunes (2008, result): “They found good agreement with various spectroscopic temperature scales; they explained a ∼ 100 K systematic difference with respect to previous implementation of the IRFM, as being most likely due the adoption of the new Vega zero points and absolute calibration of 2MASS (Cohen et al. 2003).”
Type Ia Supernovae Are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL (2007, methodology): “Cohen et al. (2003) describe the 2MASS JHKs filter system in detail and Leggett et al. (2006) provide color transformations to put observations with the 2MASS filter system on other widely used photometric systems.”
An Infrared Spectroscopic Sequence of M, L, and T Dwarfs (2004, methodology): “(1) when using the 2MASS filter transmission curves from Cohen et al. (2003) because the curves have already been multiplied by k. CUSHING, RAYNER, & VACCA1118 Vol. 623 and A0 V telluric standard star, is given in Table 4.”
The Spitzer Survey of the Small Magellanic Cloud: S3MC Imaging and Photometry in the Mid- and Far-Infrared Wave Bands (2006, methodology): “The final catalog compiled has over 400,000 point sources and is available electronically at the project URL.12 To produce a uniform catalog, we expressed all fluxes in Jy, using the following photometric zero points for BVIJHK: 4060, 3723, 2459, 1594, 1024, and 666.8 Jy (Cohen et al. 2003a, 2003b).”
FUNDAMENTAL PARAMETERS AND CHEMICAL COMPOSITION OF ARCTURUS (2011, background): “2.3.1, convolved with the V filter response function by Cohen et al. (2003), which ensures a result on the standard Landolt scale.”
On Determining Extinction from Reddening (2004, methodology): “In the case of 2MASS, the zero points were computed from the zeromagnitude fluxes estimated by Cohen et al. (2003).”
Techniques and Review of Absolute Flux Calibration from the Ultraviolet to the Mid-Infrared (2014, methodology): “Some authors (e.g., Cohen et al. 2003) define our product λR as their response function of the system.”
A new implementation of the infrared flux method using the 2MASS catalogue (2009, methodology): “1 we display the calibrated spectrum of Vega in comparison with the adopted monochromatic fluxes of Cohen et al. (2003).”
The long-term evolution of neutron star merger remnants { II. Radioactively powered transients (2013, methodology): “10 shows the broad-band light curves for these two cases, calculated assuming that radiation is emitted with a blackbody spectrum filtered with the standard filter functions for the UBVRI (Bessell & Murphy 2012) and JHK (Cohen et al. 2003) bands.”