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Dome A in the Antarctic plateau is likely one of the best astronomical observing sites on Earth. The first one of three Antarctic Survey Telescope (AST3-1), a 50/68 cm Schmidt-like equatorial-mount telescope, is the first trackable…

Solar and Stellar Astrophysics · Physics 2015-11-10 Gang Li , Jianning Fu , Xuanming Liu

Dome A on the Antarctic plateau is likely one of the best observing sites on Earth thanks to the excellent atmospheric conditions present at the site during the long polar winter night. We present high-cadence time-series aperture…

AST3-2 is the second of the three Antarctic Survey Telescopes, aimed at wide-field time-domain optical astronomy. It is located at Dome A, Antarctica, which is by many measures the best optical astronomy site on the Earth's surface. Here we…

We have conducted a deep photometric survey of a 0.5 deg x 0.5 deg area of the Galactic Plane using the WFI instrument on the 2.2-m ESO telescope on La Silla, Chile. The dataset comprises a total of 267 R-band images, 204 from a 16 day…

Solar and Stellar Astrophysics · Physics 2015-05-19 V. R. Miller , M. D. Albrow , C. Afonso , Th. Henning

We present results from a season of observations with the Chinese Small Telescope ARray (CSTAR), obtained over 183 days of the 2010 Antarctic winter. We carried out high-cadence time-series aperture photometry of 20,000 stars with i<15.3…

We present the analysis of 11 589 eclipsing binary stars identified in twenty-one OGLE-III Galactic disk fields toward constellations of Carina, Centaurus, and Musca. All eclipsing binaries but 402 objects are new discoveries. The binaries…

A photometric study of variable stars in the field of old open cluster NGC 188 is discussed. Observations were carried out in two bands R and I for 5513 stars up to R = 17 mag in the field of 1.5 x 1.5 grad. around the cluster. The…

Solar and Stellar Astrophysics · Physics 2013-04-19 A. A. Popov , V. V. Krushinsky , E. A. Avvakumova , A. Y. Burdanov , A. F. Punanova , I. S. Zalozhnih

We present a $\approx 11.5$ year adaptive optics (AO) study of stellar variability and search for eclipsing binaries in the central $\sim 0.4$ pc ($\sim 10''$) of the Milky Way nuclear star cluster. We measure the photometry of 563 stars…

This work presents the first long-term photometric variability survey of the intermediate-age open cluster NGC 559. Time-series V band photometric observations on 40 nights taken over more than three years with three different telescopes…

Solar and Stellar Astrophysics · Physics 2020-09-30 Yogesh C. Joshi , Ancy Anna John , Jayanand Maurya , Alaxendra Panchal , Brijesh Kumar , Santosh Joshi

This paper contains the fifth part of the Catalog of Variable Stars created from the V-band photometric data collected by 9x9 deg camera of the All Sky Automated Survey. Preliminary list of variable stars found in the fields located between…

Astrophysics · Physics 2007-05-23 G. Pojmanski , B. Pilecki , D. Szczygiel

As extensive ground-based observations and characterisation of different variable stars are of the utmost importance in preparing optimal input catalogues for space missions, our aim was to search for new variable stars in selected fields…

We used four-year baseline HST/WFC3 IR observations of the Galactic Centre in the F153M band (1.53 micron) to identify variable stars in the central ~2.3'x2.3' field. We classified 3845 long-term (periods from months to years) and 76…

We report the results of a diffraction-limited, photometric variability study of the central 5"x5" of the Galaxy conducted over the past 10 years using speckle imaging techniques on the W. M. Keck I 10 m telescope. Within our limiting…

Astrophysics · Physics 2008-11-26 M. Rafelski , A. M. Ghez , S. D. Hornstein , J. R. Lu , M. Morris

We report the detection of 1143 variable stars towards the Galactic bulge, including 320 previously uncatalogued variables, using time-series photometry extracted from data obtained with the VIMOS imager at the Very Large Telescope.…

Solar and Stellar Astrophysics · Physics 2018-10-31 N. Kains , A. Calamida , M. Rejkuba , A. Bhardwaj , L. Inno , K. C. Sahu , M. Zoccali , G. Bono , F. Surot , J. Anderson , S. Casertano

We have monitored a 3 deg2 area toward Serpens Main in the Pan-STARRS1 r, i, and z bands from 2016 April to September. Light curves of more than 11,000 stars in each band were obtained, and 143 variables have been identified. Among those,…

Solar and Stellar Astrophysics · Physics 2021-07-14 Jia Yin , Zhiwei Chen , Rolf Chini , Martin Haas , Sadegh Noroozi , Yongqiang Yao , Zhibo Jiang , Xuan Qian , Liyong Liu , Yao Li

Motivated by the detection of a recent outburst of the massive luminous blue variable LMC-R71, which reached an absolute magnitude M_V = -9.3 mag, we undertook a systematic study of the optical variability of 1268 massive stars in the Large…

Solar and Stellar Astrophysics · Physics 2015-03-13 D. M. Szczygiel , K. Z. Stanek , A. Z. Bonanos , G. Pojmanski , B. Pilecki , J. L. Prieto

We have conducted a long-term V-band photometric monitoring of M33 on 95 nights during four observing seasons (2000 - 2003). A total number of 6418 lightcurves of bright objects in the range of 14 - 21 mag have been obtained. All…

Astrophysics · Physics 2009-11-11 Avi Shporer , Tsevi Mazeh

In this paper, we report the detections of stellar variabilities from the first 2-year observations of sky area of about 1300 square degrees from the Tsinghua University-NAOC Transient Survey (TNTS). A total of 1237 variable stars…

Solar and Stellar Astrophysics · Physics 2015-09-23 Xinyu Yao , Lingzhi Wang , Xiaofeng Wang , Tianmeng Zhang , Juncheng Chen , Wenlong Yuan , Jun Mo , Wenxiong Li , Zhiping Jin , Xuefeng Wu , JunDan Nie , Xu Zhou

A photometric survey of three Southern target fields with BEST II yielded the detection of 2,406 previously unknown variable stars and an additional 617 stars with suspected variability. This study presents a catalog including their…

Photometric data from the ASAS - South (declination less than 29 deg) survey have been used for identification of bright stars located near the sources from the ROSAT All Sky Survey Bright Source Catalog (RBSC). In total 6028 stars brighter…

Solar and Stellar Astrophysics · Physics 2012-04-18 M. Kiraga
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