The All-wavelength Extended Groth Strip International Survey ( AEGIS ) team presents broad-band spectral energy distributions ( SEDs ) , from X-ray to radio wavelengths , for 71 galaxies spanning the redshift range 0.55–1.16 ( \langle z \rangle \sim 0.7 ) .
Galaxies with secure redshifts are selected from a small ( 22 arcmin ^ { 2 } ) sub-section of the Keck Data presented herein were obtained at the W. M. Keck Observatory , which is operated as a scientific partnership among the California Institute of Technology , the University of California , and NASA .
The Observatory was made possible by the generous financial support of the W. M. Keck Foundation . /DEIMOS galaxy redshift survey in the Extended Groth Strip field that has also been targeted for deep panchromatic imaging by Chandra NASA ’ s Chandra X-Ray Observatory was launched in July 1999 .
The Chandra Data Archive is part of the Chandra X-Ray Center which is operated for NASA by the Smithsonian Astrophysical Observatory . ( X-ray : 0.5–10 keV ) , GALEX The Galaxy Evolution Explorer is a NASA Small Explorer , launched in April 2003 .
We gratefully acknowledge NASA ’ s support for construction , operation , and science analysis of the GALEX mission , developed in cooperation with the Centre National d ’ Etudes Spatiales of France and the Korean Ministry of Science and Technology . ( ultraviolet : 120–250 nm ) , Canada-France-Hawaii Telescope Based on observations obtained with the Canada-France-Hawaii Telescope which is operated by the National Research Council of Canada , the Institut National des Science de l ’ Univers of the Centre National de la Recherche Scientifique of France , and the University of Hawaii . ( optical : 360–900 nm ) , Hubble Space Telescope Based on observations with the NASA/ESA Hubble Space Telescope , obtained at the Space Telescope Science Institute , which is operated by the Association of Universities for Research in Astronomy , Inc. , under NASA contract NAS 5-26555 . ( optical/near infrared : 440–1600 nm ) , Palomar Observatory Based on observations obtained at the Hale Telescope , Palomar Observatory , as part of a collaborative agreement between the California Institute of Technology , its divisions Caltech Optical Observatories and the Jet Propulsion Laboratory ( operated for NASA ) , and Cornell University . ( near infrared : 1200–2200 nm ) , Spitzer Based on observations made with the Spitzer Space Telescope , which is operated by the Jet Propulsion Laboratory , California Institute of Technology under a contract with NASA .
Support for this work was provided by NASA through contract numbers 1256790 , 960785 , and 1255094 issued by JPL/Caltech . ( mid/far infrared : 3.6–70 \mu m ) , and the Very Large Array The Very Large Array of the National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities , Inc . ( radio : 6–20 cm ) .
The absolute magnitude of the typical galaxy in our sample is M _ { B } = - 19.82 .
The ultraviolet to mid-infrared portion of their spectral energy distributions ( SEDs ) are found to be bracketed by two stellar-only model SEDs : ( 1 ) an early burst followed by passive evolution and ( 2 ) a constant star-formation rate since early times ; this suggests that few of these galaxies are undergoing major starbursts .
Approximately half the galaxies show a mid- to far-infrared excess relative to the model SEDs , consistent with thermal emission from interstellar dust .
Two objects have power-law SEDs , indicating that they are dominated by active galactic nuclei ; both are detected in X-rays .
The galaxies are grouped by rest-frame color , quantitative optical morphology , and [ O ii ] emission line strength ( possible indicator of star formation ) .
On average , the panchromatic SEDs of the galaxies , from the ultraviolet to the infrared , follow expected trends : redder SEDs are associated with red U - B , early-type morphology , and low [ O ii ] emission , and vice versa for blue SEDs . These data are available at http : //aegis.ucolick.org/products .