J/MNRAS/327/601 OGLE-II High proper motion stars (Eyer+, 2001)
Photometric detection of high proper motions in dense stellar fields using
Difference Image Analysis.
Eyer L., Wozniak P.R.
<Mon. Not. R. Astron. Soc. 327, 601 (2001)>
=2001MNRAS.327..601E 2001MNRAS.327..601E
ADC_Keywords: Stars, variable ; Proper motions
Keywords: methods: data analysis - techniques: photometric - astrometry -
stars: variables: other
Abstract:
The difference image analysis (DIA) of the images obtained by the
Optical Gravitational Lensing Experiment (OGLE-II) revealed a peculiar
artefact in the sample of stars proposed as variable by Woniak in one
of the Galactic bulge fields: the occurrence of pairs of candidate
variables showing anti-correlated light curves monotonic over a period
of 3 yr. This effect can be understood, quantified and related to the
stellar proper motions. DIA photometry supplemented with a simple
model offers an effective and easy way to detect high proper motion
stars in very dense stellar fields, where conventional astrometric
searches are extremely inefficient.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 74 HPM stars found in the OGLE bulge field SC1
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See also:
J/AcA/51/175 : OGLE-II DIA microlensing events (Wozniak+, 2001)
J/AcA/50/421 : OGLE-II DIA data (Wozniak+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Name1 First OGLE BUL-SC1 number of the pair
5 A1 --- --- [-]
6- 9 I4 --- Name2 Second OGLE BUL-SC1 number of the pair
11- 15 F5.2 mag Imag I magnitude
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 45 F5.1 mas/yr pmRA Proper motion in right ascension
47- 49 F3.1 mas/yr e_pmRA rms uncertainty on pmRA
51- 55 F5.1 mas/yr pmDE Proper motion in declination
57- 59 F3.1 mas/yr e_pmDE rms uncertainty on pmDE
61- 64 F4.1 mas/yr pm Total proper motion
66- 68 F3.1 mas/yr e_pm rms uncertainty on pm
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 20-Jan-2003