Results 11 to 20 of about 9,499,304 (290)
Wide Field X-ray Telescope: a moderate class mission [PDF]
SPIE Proceedings, 2010 Sensitive surveys of the X-ray universe have been limited to small areas of the sky due to the intrinsically small field of view of Wolter-I X-ray optics, whose angular resolution degrades with the square of the off axis angle. High angular resolution is needed to achieve a low background per source, minimize source confusion, and distinguish point ...
S. S. Murray +16 more
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On the design of wide-field x-ray telescopes [PDF]
SPIE Proceedings, 2009 X-ray telescopes having a relatively wide field-of-view and spatial resolution vs. polar off-axis angle curves much flatter than the parabolic dependence characteristic of Wolter I designs are of great interest for surveys of the X-ray sky and potentially for study of the Sun s X-ray emission.
Ronald F. Elsner +3 more
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Meteor detection in wide-field survey telescopes [PDF]
, 2014 Meteor observing requires a huge field of view (FoV) as its appearance in the sky cannot be foreseen. In the new era of the time-domain astronomy many telescopes will cover the whole sky with a cadence of a few days. These requirements lead to fast large telescopes with wide FoVs, like the Schmidt cameras that were widely used for meteor observing in ...
Ocaña, Francisco +2 more
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Point spread function modelling for wide-field small-aperture telescopes with a denoising autoencoder [PDF]
, 2020 The point spread function reflects the state of an optical telescope and it is important for the design of data post-processing methods. For wide-field small-aperture telescopes, the point spread function is hard to model because it is affected by many ...
Cai, Dongmei +4 more
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Optimized background suppression in near field lidar telescopes [PDF]
, 2003 It is shown that a tilted slit in the focal plane of the lidar telescope limits the telescopes field of view efficiently and suppresses the background in the lidar signal by up to an order of magnitude better than a circular ...
Freudenthaler, Volker
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Novel X-ray telescopes for wide-field X-ray monitoring [PDF]
, 2005 We report on fully innovative very wide-field of view X-ray telescopes with high sensitivity as well as large field of view. The prototypes are very promising, allowing the proposals for space projects with very wide-field Lobstereye X-ray optics to be ...
Švéda, L. +3 more
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Astrometry with Wide-Field Telescopes in the Abastumani Astrophysical Observatory [PDF]
Symposium - International Astronomical Union, 1994 For the past 30 years purposeful, highly accurate photographic observations have been carried on in Abastumani to solve a series of astrometric problems. The principal observational instruments are a 70 cm Maksutov system mirror telescope — AS-32 (F = 2100 mm) and a 40 cm double Zeiss astrograph (F =
R.I. Kiladze, S.M. Chanturiya
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Study of the Blazhko Type RRc stars in the Stripe 82 Region Using SDSS and ZTF
The Astronomical Journal, 2023 RR Lyrae stars (RRLs) are pulsating stars, many of which also show a long-term variation called the Blazhko effect which is a modulation of amplitude and phase of the lightcurve.
Vaidehi Varma +2 more
doaj +1 more source
Blind deconvolution with principal components analysis for wide-field and small-aperture telescopes [PDF]
, 2017 Telescopes with a wide field of view (greater than 1°) and small apertures (less than 2 m) are workhorses for observations such as sky surveys and fast-moving object detection, and play an important role in time-domain astronomy. However, images captured
Cai, Dongmei +9 more
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Two-mirror aplanatic telescopes with a flat field
, 2022 A complete description is given of two-mirror telescopes with a flat medial focal surface, on which the images of stars are circles of least confusion. Particular attention is paid to aplanats, since their field of view is noticeably larger than that of ...
Terebizh, V. Yu.
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