کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10694441 | 1020089 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A database of UV variables from the GALEX surveys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We present the first part of a comprehensive study to search for variability in the UV GALEX archive. GALEX provided photometric measurements for over 200 million objects in FUV and NUV, from sky surveys with different depth and coverage. In this work we extract 410,408 unique sources showing variability (ÎNUV⩾0.6mag , ÎFUV⩾0.4mag) in both NUV and FUV from a total of 2,106,816 measurements. We restrict our analysis to 7264 sources that have at least 30 measurements, sampled with serendipitous time coverage. This first sample selection includes both extragalactic sources and Milky Way stellar objects, displaying both periodic and non-periodic variability, of various types including RR Lyrae, flare stars, transients, and eclipsing binaries. Amplitudes of magnitude variations are found from our minimum selection threshold up to several magnitudes. We describe the selection criteria and procedures, we characterize the main classes of variables within the sample, and present the layout of the resulting catalog which will be also made available as on-line resource. Beyond our immediate goals of discovering and characterizing UV-selected variables, this work provides synergy with existing and planned surveys at other wavelengths (e.g. SDSS, PanSTARRS, LSST, GAIA).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 53, Issue 6, 15 March 2014, Pages 967-972
Journal: Advances in Space Research - Volume 53, Issue 6, 15 March 2014, Pages 967-972
نویسندگان
Alberto Conti, Luciana Bianchi, Nitish Chopra, Marina Orio, Bernie Shiao,