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J/AcA/58/279 New Moscow Digital Variables in Field 66 Oph (Kolesnikova+, 2008)
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Beginning of ReadMe :J/AcA/58/279 Moscow Digital Variables in Field of 66 Oph (Kolesnikova+, 2008)
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New variable stars on digitized Moscow collection plates.
Field 66 Ophiuchi (Northern Half).
Kolesnikova D.M., Sat L.A., Sokolovsky K.V., Antipin S.V., Samus N.N.
<Acta Astron., 58, 279-292 (2008)>
=2008AcA....58..279K
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ADC_Keywords: Surveys ; Stars, variable
Keywords: stars: variables: general - surveys
Abstract:
We initiated digitization of the Moscow collection of astronomical
plates using flatbed scanners. Techniques of photographic photometry
of the digital images were applied, enabling an effective search for
new variable stars. Our search for new variables among 140000 stars in
the 10degx5deg northern half of the field centered at 66 Oph,
photographed with the Sternberg Institute's 40-cm astrograph in
1976-1995, gave 274 new discoveries, among them: 2 probable Population
II Cepheids, 81 eclipsing variables, 5 high-amplitude delta Sct stars
(HADSs), 82 RR Lyr stars, 62 red irregular variables and 41 red
semiregular stars, 1 slow irregular variable not red in color.
Ephemerides were determined for periodic variable stars. We detected
about 30 variability suspects for follow-up CCD observations,
confirmed 11 stars from the New Catalog of Suspected Variable Stars,
and derived new ephemerides for 2 stars already contained in the
General Catalog of Variable Stars.
Description:
The field 66 Oph (18:00.3+04:22, J2000.0) was photographed with the
40-cm astrograph in 1976-1995, a total of 254 plates were acquired.
The field of view of the 40-cm astrograph is 10degx10deg, on
30x30cm plates (the focal length is 1600mm).
The list of fields, with numbers of plates obtained, can be found in
Internet (http://cataclysm.sai.msu.ru/www/plates/40.dat).
Our phased photographic light curves of the new periodic variable
stars (with the exception of some of the red semiregular variables)
can be found at the web site of our team
(http://www.sai.msu.su/gcvs/digit/mdv/).
The observations of all the new variable stars are also available at
our web site (http://www.sai.msu.su/gcvs/digit/mdv/data/).