Results 61 to 70 of about 5,542,325 (204)

Fibre Bragg gratings for high spectral and temporal resolution astronomical observations

open access: yes, 2012
Dynamic spectral analysis of astronomical events has the potential to deliver the information needed to clarify or complete important theoretical descriptions of astronomical phenomena. There is currently a lack of detailed sub-minute observations due to
Jovanović, Nemanja   +7 more
core   +1 more source

Milankovitch Cyclicity and Stable Isotope Calibration in the Paleogene (invited)

open access: yes, 2003
Significant progress has been made over the last decade in the extension of astronomically calibrated geological time scales for the Neogene (Hilgen et al., 1999, Shackleton et al., 1999).
Pälike, H., Shackleton, N.J.
core   +1 more source

Astronomical Seeing and Meteorological Parameters at Maidanak Observatory

open access: yes, 2023
In this article, we present the results of astronomical seeing measurements conducted at the Maidanak observatory and the influence of meteorological parameters on astronomical seeing.
Shuhrat Ehgamberdiev   +3 more
core   +1 more source

Quantifying the Contamination from nearby Stellar Companions in Gaia DR3 Photometry

open access: yesThe Astronomical Journal
Identifying and removing binary stars from stellar samples is a crucial but complicated task. Regardless of how carefully a sample is selected, some binaries will remain and complicate interpretation of results, especially via flux contamination of ...
Kendall Sullivan   +3 more
doaj   +1 more source

Receipt for membership of Carr Waller Pritchett to the Royal Astronomical Society, 16 February 1880.

open access: yes, 1880
Receipt for £2.2.0 (two guineas) from the Royal Astronomical Society, dated 16 February 1880 and signed by "W.N. Wesley, Asst Sec"
Royal Astronomical Society
core   +1 more source

Identifying Pulsar Candidates in Interferometric Radio Images Using Scintillation

open access: yesThe Astrophysical Journal
Pulsars have been primarily detected by their narrow pulses or periodicity in time domain data. Interferometric surveys for pulsars are challenging due to the trade-off between beam sensitivity and beam size and the corresponding tradeoff between survey ...
Jitendra Salal   +2 more
doaj   +1 more source

Extending the geological calibration of the geological time scale

open access: yes, 2002
This thesis arises from the fact that changes in the geometry of the Earth-Sun system, due to the gravitational interaction among the planets, cause quasi-cyclic climatic variations that are imprinted in the geological record.A speech-recognition method ...
Pälike, Heiko
core   +3 more sources

Astrometric Calibration of MagAO-X with Updated Solutions for HD 165054 Field Stars

open access: yesThe Astronomical Journal
MagAO-X is a recently commissioned extreme adaptive optics instrument for the Magellan Clay 6.5 m telescope at Las Campanas Observatory in Chile. MagAO-X had first light in 2019 and subsequent commissioning observations in 2022 and 2023.
Joseph D. Long   +15 more
doaj   +1 more source

РАЗВИТИЕ РАДИОАСТРОНОМИЧЕСКОГО ЦЕНТРА ДАННЫХ (RADC) НА ПРАО АКЦ ФИАН

open access: yesOdessa Astronomical Publications, 2011
The Radio Astronomy Data Center (RADC) are developed at PRAO ASC LPI in last some years. It consists from: a) the database of most important for radio astronomers astronomical catalogs; b) the database of observational data of Pushchino Radio Astronomy ...
В. А. Самодуров   +7 more
doaj   +1 more source

Historical astronomical data : urgent need for preservation, digitization enabling scientific exploration [PDF]

open access: yes, 2019
Over the past decades and even centuries, the astronomical community has accumulated a significant heritage of recorded observations of a great many astronomical objects.
Webb, David   +18 more
core   +1 more source

Home - About - Disclaimer - Privacy