共查询到20条相似文献，搜索用时 156 毫秒
1.
Juan de Dios Santander-Vela Emilio García Stephane Leon Victor Espigares José Enrique Ruiz Lourdes Verdes-Montenegro Enrique Solano 《Experimental Astronomy》2012,34(3):623-652
The Virtual Observatory (VO) is becoming the de-facto standard for astronomical data publication. However, the number of radio astronomical archives is still low in general, and even lower is the number of radio astronomical data available through the VO. In order to facilitate the building of new radio astronomical archives, easing at the same time their interoperability with VO framework, we have developed a VO-compliant data model which provides interoperable data semantics for radio data. That model, which we call the Radio Astronomical DAta Model for Single-dish (RADAMS) has been built using standards of (and recommendations from) the International Virtual Observatory Alliance (IVOA). This article describes the RADAMS and its components, including archived entities and their relationships to VO metadata. We show that by using IVOA principles and concepts, the effort needed for both the development of the archives and their VO compatibility has been lowered, and the joint development of two radio astronomical archives have been possible. We plan to adapt RADAMS to be able to deal with interferometry data in the future. 相似文献
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Ji-Cheng Zhang Chen Cao Nan Song Fei-Ge Wang Xiao-Tong Zhang 《Chinese Astronomy and Astrophysics》2011,35(4):409
In order to make more accurate estimates of the physical parameters of extrasolar planets, the observation and research on the phenomena of transits of the 7 known stars with the planetary systems TrES-1, TrES-3, XO-2, WASP-1, WASP-2, WASP-3 and HAT-P-7 are carried out with the 1-m reflecting telescope at Shandong University Weihai Astronomical Observatory/Weihai Municipal Astronomical Observatory. The fundamental conditions of the observation and data processing are introduced, and the transit light curves as well as the parameters of some planets derived from them are given. At the same time, when the results are summarized and analyzed, the prospects for the more in-depth and detailed researches which will be further carried out are also described. 相似文献
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V. R. Amirkhanyan V. L. Afanas'ev S. N. Dodonov A. V. Moiseev V. P. Mikhailov 《Astronomy Letters》2004,30(12):834-842
We performed spectroscopic observations of 22 radio sources from the Zelenchuk survey (Sternberg Astronomical Institute) using the 6-m and 1-m Special Astrophysical Observatory telescopes. For 18 objects, we determined the redshifts. Ten, seven, and one of these objects were identified with quasars, elliptical galaxies, and a Seyfert galaxy, respectively. Four radio sources have a continuum spectrum, and three of them are BL Lac objects. We failed to classify one object. 相似文献
6.
J. L. Payne G. L. White M. D. Filipovi&#; 《Monthly notices of the Royal Astronomical Society》2008,383(3):1175-1194
We use long-slit spectra from shocked regions of radio supernova remnants (SNRs) in the Large Magellanic Cloud to estimate electron density and derive an average 'metal' abundance of 10−3.9 based on diagnostic line ratio plots. These simple diagnostics may be especially useful to determine abundances in more distant galaxies. Abundance values listed in this paper, in units of log(x/H) + 12, for nitrogen (7.3) and oxygen (8.2) agree with those reported in the literature. These estimates – which we assume to be dominated by the interstellar medium with little evolutionary interference – were obtained from spectral analysis of ∼50 per cent of known radio SNRs using the double beam spectrograph on the 2.3-m Advanced Technology Telescope at Siding Spring Observatory in Australia and the Cassegrain spectrograph on the 1.9-m Radcliffe telescope at the South African Astronomical Observatory. We also found optical evidence of shocked regions near 2 of 20 radio SNR candidates (J053620−693136 and J053731−662740), strengthening their identification as true remnants. 相似文献
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3C 66A is one of the most interesting blazar. Our monitoring was carried out with a 1.56-m telescope of the Shanghai Astronomical Observatory (SHAO) from 13 December 1994 to 9 November 2008. Some peaks and gradual brightening of the source up to three times were observed. 相似文献
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IPS observations have recently begun at Miyun Station, Beijing Astronomical Observatory. This paper briefly describes the
radio telescope at Miyun Station, discusses the observation and the data reduction procedures, and presents the preliminary
results of observations on IPS source 3C48.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
9.
We list the principal stages of astroclimatic studies concerned with choosing the sites for astrophysical observatories in
Caucasus and Crimea. We chow that the sites for three observatories in Northern Caucasus (Kislovodsk Mountain Astronomical
Station of Pulkovo Main Astronomical Observatory of the Russian Academy of Sciences, Special Astrophysical Observatory of
the Russian Academy of Sciences, Terskol Observatory) were chosen without obtaining representative statistical data in terms
of the number of clear night hours and seeing. We report the data on the number of clear night hours and seeing for the 6-m
telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences based on results of long-term observations.
We discuss the possible causes of the discrepancies between experimental and forecast data and conclude that currently none
of the three observatories in the North Caucasus can be preferred because of the great variety of the methods employed and
limited statistics in terms of astroclimatic and meteorological parameters for some sites. 相似文献
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Wei-Kang Zheng Jin-Song Deng Meng Zhai Li-Ping Xin Yu-Lei Qiu Jing Wang Xiao-Meng Lu Jian-Yan Wei Jing-Yao Hu 《中国天文和天体物理学报》2008,8(6)
A gamma-ray burst (GRB) optical photometric follow-up system at the Xinglong Observatory of National Astronomical Observatories of China (NAOC) has been constructed. It uses the 0.8-m Tsinghua-NAOC Telescope (TNT) and the 1-m EST telescope, and can au-tomatically respond to GRB Coordinates Network (GCN) alerts. Both telescopes slew rela-tively fast, being able to point to a new target field within ～ 1 min upon a request. Whenever available, the 2.16-m NAOC telescope is also used. In 2006 the system responded to 15 GRBs and detected seven early afterglows. In 2007 six GRBs have been detected among 18 follow-up observations. TNT observations of the second most distant GRB 060927 (z = 5.5) are shown, which started as early as 91 s after the GRB trigger. The afterglow was detected in the combined image of the first 19 × 20 s unfiltered exposures. This GRB follow-up system has joined the East-Asia GRB Follow-up Observation Network (EAFON). 相似文献
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L. N. Berdnikov A. Yu. Kniazev I. A. Usenko V. V. Kovtyukh V. V. Kravtsov 《Astronomy Letters》2010,36(7):490-497
We present the results obtained by analyzing 20 spectra of six bright Cepheids taken with the 1.9-m telescope at the South
African Astronomical Observatory. The chemical composition and atmospheric parameters have been determined for XX Sgr, AP
Sgr, RV Sco, RY Sco, V482 Sco, and V636 Sco. 相似文献
12.
S. Yu. Gorda Yu. Yu. Balega E. A. Pluzhnik Z. U. Shkhagosheva 《Astrophysical Bulletin》2007,62(4):352-359
A complete set of parameters of the apparent relative orbit of the third body in the SZ Cam system is determined for the first time based on new speckle-interferometric and photometric observations of the eclipsing binary SZ Cam made with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and 0.5-m telescope of the Astronomical Observatory of Ural State University and published data. The mass of the third body and the distance to SZ Cam are estimated at M 3 = 23.4M ⊙ and d = 1125 kpc, respectively. The binary nature of the third body is confirmed. It is suggested that SZ Cam is possibly not a member of the open star cluster NGC 1502 onto whose center it projects. A total of 16 new times of minima of SZ Cam are reported. 相似文献
13.
V. L. Afanasiev S. N. Dodonov A. V. Moiseev V. Chavushyan R. Mujica Y. Juarez A. G. Gorshkov V. K. Konnikova M. G. Mingaliev 《Astronomy Letters》2003,29(9):579-586
We present the classification of optical identifications and radio spectra of six radio sources from a complete (in flux density) sample in the declination range 10° to 12°30′ (J2000.0). The observations were carried out with the 6-m Special Astrophysical Observatory telescope (Russia) in the wavelength range 3600–10000 Å, the 2.1-m GHAO telescope (Mexico) in the range 4200–9000 Å, and the RATAN-600 radio telescope in the frequency range 0.97–21.7 GHz. Three of the six objects under study are classified as quasars, one is a BL Lac object, one is an absorption-line radio galaxy, and one is an emission-line radio galaxy. Five objects have flat radio spectra, and one object has a power-law radio spectrum. All of the radio sources identified as quasars or BL Lac objects show variable radio flux densities. The spectra of three objects were separated into extended and compact components. 相似文献
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The observations of 34 extragalactic radio sources with the 22-m Crimean Astrophysical Observatory radio telescope at 36 GHz in 1985–1994 are presented. Intensity variations were detected in 27 objects, which may result from the appearance of new components in their cores. 相似文献
15.
A. O. Grauzhanina G. G. Valyavin D. R. Gadelshin D. N. Baklanova S. I. Plachinda K. A. Antonyuk N. V. Pit G. A. Galazutdinov A. F. Valeev T. E. Burlakova A. F. Kholtygin 《Astrophysical Bulletin》2017,72(1):67-72
We present first results of spectroscopic observations of transiting exoplanets in the Special Astrophysical Observatory of the Russian Academy of Sciences with the Main Stellar Spectrograph of the 6-m BTA telescope. For the exoplanetWASP-32b, we detected a significant variation of intensity and equivalent width in the Hα spectral line of the parent star at the time of a transit. The equivalent width of the line during transit is by 8–10% larger than outside the planet passage. Residual intensity in the core of the line reveals the following tendency: the line is by 10–15% deeper inside transit than outside it. Observations with the long-slit spectrograph of the Crimean Astrophysical Observatory at the 2.6-m ZTSh telescope also showed a transit event in the Hα line, although, with a smaller amplitude and shape inverted in relation to the data from the 6-m telescope. While in the observations with the BTA the Hα line becomes deeper during the transit, in the ZTSh observations, the residual intensity of the Hα line decreases during the transit. Reducing and analysis of the archive data of WASP-32b observations with the HARPS spectrograph also confirm the Hα line modulation at the time of the transit. The observed data give evidence of the envelope in WASP-32b filling the Roche lobe and a comet-like tail of changing geometry and orientation relative to the observer. These changes determine different depths and shapes of the Hα spectral line at the time of transits. 相似文献
16.
A tip-tilt wavefront (image displacement) corrector has been designed and fabricated to increase the efficiency of direct imaging with large-sized CCD cameras. A plane-parallel glass plate tilting in two mutually perpendicular directions at an angle large enough to compensate for an image displacement of±16″ on a telescope with F ≈ 20 m forms the basis of the device. The device allows up to ≈20 corrections per second to be made when a ～14m reference star is used. We investigate the effects of aberrations introduced by the plate on the image quality. We present the results of test observations with the corrector performed on the 1.25-m ZTE telescope at the Crimean Station of the Sternberg Astronomical Institute and the 1.5-m AZT-22 telescope at the Maidanak Observatory, where test images with 1-h exposures that completely realized atmospheric seeing were obtained. 相似文献
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望远镜调度是望远镜运行中的关键组成部分, 用于辅助科研人员进行合理的观测计划安排, 提高望远镜的运行效率, 获取高质量的观测数据. 然而, 由于不同观测项目的科学需求不同, 望远镜的调度过程十分复杂. 针对短周期多目标的观测项目, 考虑望远镜换源时转动时长、观测高度角等因素进行建模, 采用贪心算法对中国科学院新疆天文台南山26m望远镜脉冲星到达时间观测列表进行调度. 通过模拟表明, 使用算法完成的观测列表可以有效地减少观测过程中的平均转动时长, 提升观测数据的质量, 提高望远镜时间利用率, 减少科研人员对观测列表编排的负担. 相似文献
19.
中国虚拟天文台研发策略与重点 总被引：5，自引：3，他引：2
由于不同的天文和技术背景，不同的虚拟天文台项目采取了不同的研究策略。本文首先介绍了国际上几个典型虚拟天文台项目的研发目标和工作重点；然后讨论了包括中国虚拟天文台在内的小型虚拟天文台项目在研发方面的优势和劣势。中国虚拟天文台项目根据自身所处的具体情况确定自己将走应用路线，争取在某些领域取得突破，研发重点包括五个方面：China-VO系统平台建设、国内外天文数据的统一访问、现有天文工具的虚拟天文台集成、天文设备的虚拟天文台集成、虚拟天文台基础上的公众教育。 相似文献
20.
Chen-Zhou Cui Markus Dolensky Peter Quinn Yong-Heng Zhao Francoise Genova National Astronomical Observatories Chinese Academy of Sciences Beijing European Southern Observatory D- Garching bei Munchen Germany CDS Observatoire Astronomique de Strasbourg France 《中国天文和天体物理学报》2006,6(3):379-386
VOFilter is an XML based filter developed by the Chinese Virtual Observatory project to transform tabular data files from VOTable format into OpenDocument format. VOTable is an XML format defined for the exchange of tabular data in the context of the Virtual Observatory (VO). It is the first Proposed Recommendation defined by International Virtual Observatory Alliance, and has obtained wide support from both the VO community and many Astronomy projects. OpenOffice.org is a mature, open source, and front office application suite with the advantage of native support of industrial standard OpenDocument XML file format. Using the VOFilter, VOTable files can be loaded in OpenOffice.org Calc, a spreadsheet application, and then displayed and analyzed as other spreadsheet files. Here, the VOFilter acts as a connector, bridging the coming VO with current industrial office applications. We introduce Virtual Observatory and technical background of the VOFilter. Its workflow, installation and usage are presented. Existing problems and limitations are also discussed together with the future development plans. 相似文献