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Title:
X-ray and radio emission from the compact galaxy III ZW 2
Authors:
Schnopper, H. W.; Delvaille, J. P.; Epstein, A.; Cash, W.; Charles, P.; Bowyer, S.; Hjellming, R. M.; Owen, F. N.; Cotton, W. D.
Affiliation:
AA(Harvard College Observatory and Smithsonian Astrophysical Observatory, Center for Astrophysics, Cambridge, Mass.), AB(Harvard College Observatory and Smithsonian Astrophysical Observatory, Center for Astrophysics, Cambridge, Mass.), AC(Harvard College Observatory and Smithsonian Astrophysical Observatory, Center for Astrophysics, Cambridge, Mass.), AD(California University, Berkeley, Calif.), AE(California University, Berkeley, Calif.), AF(California University, Berkeley, Calif.), AG(National Radio Astronomy Observatory, Socorro, N. Mex.), AH(National Radio Astronomy Observatory, Socorro, N. Mex.), AI(MIT, Cambridge, Mass.)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 222, June 15, 1978, p. L91-L94. (ApJL Homepage)
Publication Date:
06/1978
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Compact Galaxies, Galactic Evolution, Galactic Radiation, Radio Sources (Astronomy), X Ray Sources, Astronomical Spectroscopy, Radio Spectra, Sas, Satellite Observation, Very Large Array (Vla), X Ray Spectra
DOI:
10.1086/182699
Bibliographic Code:
1978ApJ...222L..91S

Abstract

X-rays from the compact galaxy III Zw 2 have been detected with the rotating modulation collimator on board SAS 3. The (2-10-keV) flux is (4.3 + or - 0.5) by 10 to the -11th power erg/sq cm per sec, which corresponds to a luminosity of 1.4 by 10 to the 45th power erg/s at 530 Mpc. Subsequent radio observations between 1.46 and 90 GHz were made at the NRAO Very Large Array and 36-foot (11-m) installations. The radio spectrum rises sharply toward higher frequencies and, below about 100 GHz, is indicative of a self-absorbed synchrotron spectrum from an extremely compact, rapidly evolving object.

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