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Proceedings Paper

Photometric Properties Of The Texas MkII Electrographic Camera
Author(s): C. B. Opal; E. P. Bozyan; P. J. Griboval
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Paper Abstract

We have investigated three aspects of the performance of the MkII Camera for stellar photometry: (1) intrinsic errors from plate to plate; (2) variations in sensitivity across the field; and (3) the extent of color transformations required and their stability with time. All evaluations were performed using plate material obtained at the telescope. Although the detector in this case was an electrographic camera, the techniques described can be used with any panoramic detector system. Briefly, the general conclusions from this evaluation are: Relative magnitudes and colors can be determined to an accuracy of 0.02 magnitude over a 2-magnitude range in the non-sky-limited case. Only simple aperture integration algorithms need be used, and flat-field and geometric distortion corrections are not necessary to obtain reliable results with the camera. Color transformations are on the order of 0.1 mag/mag, and are quite stable in time and reproducible from cathode to cathode.

Paper Details

Date Published: 16 November 1982
PDF: 12 pages
Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933488
Show Author Affiliations
C. B. Opal, Naval Research Laboratory (United States)
E. P. Bozyan, University of Texas (United States)
P. J. Griboval, University of Texas (United States)


Published in SPIE Proceedings Vol. 0331:
Instrumentation in Astronomy IV
David L. Crawford, Editor(s)

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