By Robert Burnham Jr., Space
Quantity II of this accomplished three-part advisor to the millions of celestial gadgets outdoors our sunlight approach levels from Chamaeleon through Orion. Objects are grouped based on constellation, and their definitions characteristic names, coordinates, classifications, and actual descriptions. extra notes provide attention-grabbing ancient info. 1000s of visible aids. 1977 variation.
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Extra resources for Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System, Vol. 2
Again, the system performance will not be signi®cantly degraded if the residual error on the compensated terms is much smaller than or at most equal to that due to the uncompensated wave-front modes. The point at which they are equal is indicated by a full circle on Fig. 9. The abcissa of these points gives a maximum angular distance è0 we can use as a measure of the isoplanatic patch size. To express this quantity in arcseconds, one needs to know the effective altitude of the turbulent layers.
10. Probability of ®nding a guide source brighter than a given magnitude within a given distance. Contours are for a 308 Galactic longitude. A 50% probability contour is given for the Galactic pole. Black dots indicate the guide star maximum distance and magnitude for the standard spectral bands R, I, J, H, and K. almost the full sky in the K band, and over more than 10% of the sky in the J band. Only down to the visible, the sky coverage becomes quite low. This result is roughly independent of the size of the telescope being used.
33±52. , Dordrecht. , Gilli, J. M. and Vernin, J. (1982a) On the isoplanatic patch size in stellar speckle interferometry. J. Optics (Paris) 13, 63±70. , Gilli, J. M. and Lund, G. (1982b) On the origin of speckle boiling and its effects in stellar speckle interferometry J. Optics (Paris) 13, 263±271. Roddier, F. and Roddier, C. (1986) National Optical Astronomy Observatories (NOAO) Infrared Adaptive Optics Program II. Modeling atmospheric effects in adaptive optics systems for astronomical telescopes.