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VISUAL ASTRONOMY <strong>OF</strong> <strong>THE</strong> DEEP SKY<br />

TELEDOM examples (cont. )<br />

Example 2: Sculptor System :<br />

***** T 1 d T 1 scope Optimum Detection Magnificaion *****<br />

Program e eo m: e e<br />

Bibliography<br />

Enter the telescope aperture in inches<br />

8.<br />

Enter the total magnitude of the object<br />

er the minimum and maximum sizes of the object in arc-minutes<br />

60 ,60<br />

Telescope aperture :<br />

8.0 inches<br />

Minimum usable magnification:<br />

Faintest star : 15.2<br />

27x<br />

Ob ject size : 60. 00 by 60.00 arc minutes<br />

surface brightness (magnitudes / sq . arc-sec .).<br />

.<br />

ODM :<br />

object with no telescope : 26.3<br />

reduction due to ODM : .4<br />

object in telescope at ODM : 24.5<br />

background in telescope at ODM : 24.6<br />

27x<br />

Log object cont ras t: -.8<br />

Log threshold contrast : -1 .2<br />

The object is detectable<br />

***** Program Teleodm : Telescope Optimum Detection Magnification *****<br />

Enter the telescope aperture in inches<br />

AstronomicaL ALmanac. US Government Printing<br />

Office, Washington, DC.<br />

Bartley, S. H. (195 1). The Psychophysiology of<br />

Vision. In Handbook of Experimental Psychology<br />

(S.S. Stevens, Ed.) Wiley, New York, 92 1-<br />

984.<br />

B1ackwell, H. R. (1946) . Contrast Thresholds of<br />

the Human EyeI Opt Soc Amer. 36 624-643.<br />

Bowen, K. P. (1984) . Vision and the Amateur<br />

Astronomer. Sky & Telscope April, 321 -324.<br />

Crossier, W. J. and A. H. Holway (1939). Theory<br />

and Measurement of Visual Mechanisms I.<br />

A Visual Discriminometer. II. Threshold<br />

Stimulus Intensity and Retinal Position. I<br />

Gen. Physiol., 22, 341-364.<br />

Curtis, H. D. (1901). On the Limits of Averted<br />

Vision. Lick Obs Bull 2 67-69.<br />

Di Cicco, D. (1979) . Filters to Pierce the Nightime<br />

Veil. Sky & Telescope. March, 231-236.<br />

Ferris, T. (1982). Galaxies. Stewart, Tabori and<br />

Chang, New York.<br />

Graham, C. H., N. R. Bartlett, J. L. Brown, Y.<br />

Hsia. C. G. Mueller and L. A. Riggs.<br />

(1965). Vision and Visual Perception. Wiley,<br />

New York.<br />

De Groot, S. G., J. M. Dodge and J. A. Smith.<br />

(1952). Factors in Night Vision Sensitivity:<br />

the Effect of Brightness. MRL Rep. 194, 11,<br />

1-17.<br />

Hecht, S., C. Haig and G. Wald (1935) . The Dark<br />

Adaptation of Retinal Fields of Different<br />

Size and Location. I Gen. Physiol., 19, 321-<br />

339.<br />

Hirshfield, A. and R. W. Sinnott (1985) . Sky Catalog<br />

2000.0, Vo lume 2, Double Stars, Va riable<br />

Stats and Nonstellar Objects. Sky Publishing<br />

Corp., Cambridge, Mass., and Cambridge<br />

University Press, Cambridge, England,<br />

385pp.<br />

Hoag, A. A., H. L. Johnson, B. Iriarte, R. J.<br />

Mitchell, K. L. Hallam and S. Sharpless<br />

(196 1). Photometry of Stars in Galactic<br />

Cluster Fields, Pub. US Naval Obs, Second<br />

Series, 17 349-542.<br />

Kingslake, R. (1965). Applied OP tics and Op tical Engineering,<br />

Volume 1. Light: Its Generation and<br />

Modification, Academic Press, New York and<br />

London.<br />

Mallas, J. H. and Kreimer, E. (1978) The Messier<br />

Album, Sky Publishing Corp., Cambridge,<br />

Mass., 216 pp.<br />

Middleton, W. E. K. (1958) . Vision Through The<br />

Atmosphere. Univ. of Toronto Press, Toronto.<br />

O'Dell, C. R. (1965) . Photoelectric Spectrophotometry<br />

of Gaseous Nebulae II. The Reflection<br />

Nebulae Around Merope. Astrophy. I<br />

142 604-608.<br />

Roach, F. E. and Jamnick, P. M. (1958). The Sky<br />

and the Eye. Sky & Telescope. February, 164-<br />

167.<br />

Schweizer, F. (1976) . Photometric Studies of Spiral<br />

Structure. I. The Disks and Arms of Six<br />

Sb and Sc Galaxies. Astrophy. I Suppl. 31,<br />

313-332.<br />

Sinnott, R. W. (1984) . Taming Our Chaotic<br />

Calendar. Sky & Telescope, May, 454-455.<br />

Stoltzmann, D. E. (1983). Resolution Criteria for<br />

Diffraction Limited Telescopes. Sky & Telescope,<br />

February, 176- 181.<br />

350<br />

35 1

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