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Observed Interstellar Extinction in the Ultraviolet1

Published online by Cambridge University Press:  08 February 2017

T. P. Stecher
T. P. Stecher*
Affiliation:
NASA Goddard Space Flight Center Greenbelt, Maryland

Extract

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An Observational Program to measure stellar energy distributions - in the ultraviolet between 3000 Å and 1200 Å has recently been completed. The instrumentation used was similar to that reported in reference 1. A necessary preliminary for discussion of this material is some knowledge of the extinction due to interstellar absorption. The trend of this extinction was first reported in 1964. (See ref. 2.) Additional observational material has since been obtained and is presented herein.

Five pairs of stars with similar Morgan-Keenan (MK) spectral classifications have been observed that are suitable for obtaining extinction: ζ Per and ρ Leo; ξ Per and ζ Pup; o Per and β Can Maj; σ Sco and π SCO; and δ Sco and τ SCO. The telemetry records were hand reduced by the author, each star was multiplied by the absolute calibration curve for the appropriate instrument, and the resulting flux curve was placed on a magnitude scale.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 7: Proper Motions , August 1965 , pp. 1 - 3
Copyright
Copyright © Kluwer Academic Publishers 1965

Footnotes

1

The contents of this paper were published previously in the Astrophys. J. (pub. by the Univ. of Chicago Press), vol. 142, 1965, p. 1683.

References

1. Stecher, T. P.: and Milligan, J. E.: Stellar Spectrophotometry from above the Atmosphere. Astron. J., vol. 136, 1962, p. 1.10.1086/147346CrossRefGoogle Scholar
2. Stecher, T. P.: Ultraviolet Spectrophotometry of Early-Type Stars. Astrophys. J., vol. 69, 1964, p. 558.Google Scholar
3. Johnson, H. L.; and Borgman, J.: The Law of Interstellar Extinction. Bull. Astron. Inst. Netherlands, vol. 17, 1963, p. 115.Google Scholar
4. MacRae, D.: Observatory Handbook. Roy. Astron. Soc., Canada, 1961, p. 70.Google Scholar
5. Boggess, A.; and Borgman, J.: Interstellar Extinction in the Middle Ultraviolet. Astrophys. J., vol. 140, 1964, p. 1633.10.1086/148079CrossRefGoogle Scholar
6. Alexander, J. D.; Bowen, P. J.; Gross, M. J.; and Heddle, D. W. O.: Southern Hemisphere Observations of Ultra-violet Radiation from Celestial Objects I. Experimental Techniques and Rocket Payload Technology. Proc. Roy. Soc. (London), vol. A279, 1964, p. 510.Google Scholar
7. Chubb, T. A.; and Byram, E. T.: Stellar Brightness Measurement at 1314 and 1427 Å: Observation of the OI Twilight Glow. Astrophys. J., vol. 138, 1963, p. 617.10.1086/147674CrossRefGoogle Scholar
8. Johnson, H. L.: Interstellar Extinction in the Galaxy. Astrophys. J., vol. 141, 1965, p. 923.10.1086/148186CrossRefGoogle Scholar