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Title:
Optical photometry of the emission-line M star PC 0025 + 0447
Authors:
Schneider, Donald P.; Schmidt, Maarten; Gunn, James E.; Postman, Marc
Affiliation:
AA(Inst. for Advanced Study, Princeton, NJ), AB(Palomar Observatory, Pasadena, CA), AC(Princeton Univ. Observatory, NJ), AD(Space Telescope Science Inst., Baltimore, MD)
Publication:
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 690, p. 821-824. (PASP Homepage)
Publication Date:
08/1993
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
EMISSION SPECTRA, M STARS, STELLAR SPECTROPHOTOMETRY, ASTROMETRY, CHARGE COUPLED DEVICES, POSITION (LOCATION), STELLAR COLOR
DOI:
10.1086/133238
Bibliographic Code:
1993PASP..105..821S

Abstract

We present r, i, and z CCD photometry of the emission-line M star PC 0025 + 0447 obtained in 1992 December. The optical colors of this object are significantly redder than the colors of late M-type stars. Combining these data with the earliest images we have of the object provides a time baseline of just over six years. The data are consistent with no detectable proper motion; an upper limit on the proper motion is 0.04 arcsec/yr. We also report a position for PC 0025 + 0447 that should be accurate to about 1 arcsec.

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