The WUPPE/Astro-2 Galactic Interstellar Polarization Program

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Session 20 -- Astro 2
Display presentation, Tuesday, June 13, 1995, 9:20am - 6:30pm

[20.15] The WUPPE/Astro-2 Galactic Interstellar Polarization Program

C.M. Anderson, A.J. Weitenbeck, A.D. Code, M.R. Meade, B.L. Babler, N.E. Zellner, K.S. Bjorkman, R.J. Edgar, G.K. Fox, J.J. Johnson, K.H. Nordsieck, W.T. Sanders (U. Wisconsin), O.L. Lupie (STScI), R.E. Schulte-Ladbeck, J.Herald (U. Pittsburgh), G.C. Clayton (U. Colorado)

The Wisconsin Ultraviolet Photo Polarimeter Experiment (WUPPE) flew as part of the 16 day Astro-2 Spacelab mission in March 1995. A systematic survey of the interstellar polarization in the ultraviolet was one of the main projects for the flight. The program was carefully crafted to 1) sample the galactic plane as uniformly as practicable, 2) explore sight lines of diverse chemical composition and morphology and 3) measure the shape of the UV polarization through the full range of known wavelengths of peak polarization in the optical. In the course of the mission 18 galactic stars were observed specifically for their interstellar polarization. Five other stars observed in other programs appear to be dominated by the interstellar component. (Six targets in the LMC are presented separately by Clayton et al. this meeting) To these we can add four stars observed only during Astro-1, four observed by the HST FOS and one remaining observation from the Gehrels 1970 balloon flight. We will present preliminary results from Astro-2 and combine these with both previously published UV data and optical observations from the University of Wisconsin's Pine Bluff Observatory and elsewhere.

This work has been supported by NASA contract NAS5-26777 with the University of Wisconsin.

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