The Optical Gravitational Lensing Experiment Catalog of stellar proper motions in the OGLE-II Galactic bulge fields
نویسندگان
چکیده
We present proper motion (μ) catalog of 5,078,188 stars in 49 Optical Gravitational Lensing Experiment II (OGLE-II) Galactic bulge fields, with the total area close to 11 square degrees. The proper motion measurements are based on 138 − 555 I-band images taken during four observing seasons: 1997-2000. The catalogue stars are in the magnitude range 11 < I < 18 mag. In particular, the catalogue includes Red Clump Giants (RCGs) and Red Giants in the Galactic Bulge, and main sequence stars in the Galactic disc. The proper motions up to μ = 500 mas yr −1 were measured with the mean accuracy of 0.8 ∼ 3.5 mas yr, depending on the brightness of a star. This catalogue may be useful for studying the kinematic of stars in the Galactic Bulge and the Galactic disk.
منابع مشابه
Photometric Detection of High Proper Motions in Dense Stellar Fields Using Difference Image Analysis
The Difference Image Analysis (DIA) of the images obtained by the Optical Gravitational Lensing Experiment (OGLE-II) revealed a peculiar artifact in the sample of stars proposed as variable by Woźniak (2000) in one of the Galactic bulge fields: the occurrence of pairs of candidate variables showing anticorrelated light curves monotonic over a period of 3 years. This effect can be understood, qu...
متن کاملThe Optical Gravitational Lensing Experiment. the Catalog of Periodic Variable Stars in the Galactic Bulge. Ii. Periodic Variables in Four Baade’s Window
We present the second part of the OGLE Catalog of Periodic Variable Stars in the Galactic bulge. 800 variable stars found in four Baade’s Window fields BW1, BW2, BW3 and BW4 are presented. Among them 71 are classified as pulsating, 465 as eclipsing and 264 as miscellaneous type. The Catalog and individual observations are available in digital form from the OGLE Internet archive.
متن کاملVariability-selected QSO candidates in OGLE-II Galactic Bulge fields
We present 97 QSO candidates in 48 Galactic Bulge fields of the Optical Gravitational Lensing Experiment II (OGLE-II) covering ∼ 11 square degrees, which are selected via their variability. We extend light curves of variable objects which were detected in 3-year baseline in the OGLE-II variable star catalog to 4th year. We search for objects which are faint (16 < I0 < 18.5) and slowly variable ...
متن کاملar X iv : a st ro - p h / 03 06 56 7 v 1 2 6 Ju n 20 03 1 The Optical Gravitational Lensing Experiment
We present I-band light curves of 54 Population II Cepheids identified in the OGLE-II catalog of variable objects in the Galactic bulge fields. Their periods range from a fraction of a day to several days. Their light curves show very close similarity to the light curves of classical Cepheids with periods a few times longer. We analyze location of the newly identified Population II Cepheids in ...
متن کاملCatalog of fundamental mode RR Lyrae stars in the Galactic bulge from the Optical Gravitational Lensing Experiment
We present a catalog of 1888 distinct fundamental-mode RR Lyrae stars detected in the Galactic bulge fields of the second phase of the Optical Gravitational Lensing Experiment (OGLE), covering an area near 11 deg. These stars were selected primarily according to their light curve morphologies. The catalog includes basic parameters of the light curves, significant frequencies detected close to t...
متن کامل