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An Imaging Survey of the Galactic H-Alpha Emission with Arcminute Resolution

Published online by Cambridge University Press:  25 May 2016

B. Dennison ,
J.H. Simonetti ,
G.A. Topasna  and
C. Kelleher
B. Dennison
Affiliation:
Institute for Particle Physics and Astrophysics Virginia Polytechnic Institute and State University
J.H. Simonetti
Affiliation:
Institute for Particle Physics and Astrophysics Virginia Polytechnic Institute and State University
G.A. Topasna
Affiliation:
Institute for Particle Physics and Astrophysics Virginia Polytechnic Institute and State University
C. Kelleher
Affiliation:
Institute for Particle Physics and Astrophysics Virginia Polytechnic Institute and State University

Extract

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We are presently carrying out a northern hemisphere survey of the Galactic Hα emission. Our instrument, the Virginia Tech Spectral Line Imaging Camera (SLIC) utilizes a fast objective lens (f/1.2) with a cryogenically-cooled TK 512×512 CCD. A filter wheel in front of the lens allows us to select interference filters, including a narrowband Hα filter and a broader bandpass continuum filter in a line free part of the spectrum. The fast optics in combination with the low noise CCD result in sub-Rayleigh sensitivity at confusion limited levels. (1 Rayleigh = 106/4π photons cm–2 s–1 sr–1.) This corresponds to an emission measure sensitivity of ≈ 1 pc cm–6. Parameters of our system are given in Table 1.

Type
Part 3. The Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 179: New Horizons from Multi-Wavelength Sky Surveys , 1998 , pp. 182 - 183
Copyright
Copyright © Kluwer 1998 

References

Simonetti, J.H., Dennison, B. and Topasna, G.A., 1996. Astrophys. J. Letters, 458, L1.Google Scholar