J/AcA/58/279 Moscow Digital Variables in Field of 66 Oph (Kolesnikova+, 2008)
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 2008AcA....58..279K
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 10°x5° 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 10°x10°, 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/).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 107 274 New Moscow Digital Variables
remarks.dat 68 47 Remarks on variable stars
table2.dat 90 13 New data on known variables
data/* . 274 Individual light curves
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See also:
http://www.sai.msu.su/gcvs/digit/mdv/ : MDV Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- MDV [39/312] Sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18 I1 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 26 F4.1 arcsec DEs Declination (J2000)
28- 47 A20 --- OName Other name
49- 53 A5 --- Type Variable type
55- 59 F5.2 mag magM Maximum photographic magnitude
60 A1 --- --- [-]
61- 65 F5.2 mag magm Minimum photographic magnitude
66 A1 --- u_magm Uncertainty flag on Vmagm
67 A1 --- --- [-]
68- 72 F5.2 mag magm2 ? Second minimum photographic magnitude
73 A1 --- u_magm2 Uncertainty flag on VmagmII
75- 77 A3 --- n_T0 Min or Max for Epoch
79- 87 F9.3 d T0 ? Epoch (JD-2400000)
90-100 F11.7 d Per ? Period
101 A1 --- u_Per Uncertainty flag on Per
103-107 A5 --- Rem Remarks, detailed in "remarks.dat" file
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Byte-by-byte Description of file: remarks.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Rem Remark number
3- 68 A66 --- Text Text of the remark
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- GCVS/NSV GCVS/NSV designation
11- 18 A8 --- HV/SON HV/SON designation
20- 21 I2 h RAh Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 30 F5.2 s RAs Right ascension (J2000)
32 A1 --- DE- Declination sign (J2000)
33 I1 deg DEd Declination (J2000)
35- 36 I2 arcmin DEm Declination (J2000)
38- 41 F4.1 arcsec DEs Declination (J2000)
43- 46 A4 --- Type Variable type
48- 51 F4.1 mag magM Maximum photographic magnitude
52 A1 --- --- [-]
53- 56 F4.1 mag magm Minimum photographic magnitude
57 A1 --- --- [-]
58- 61 F4.1 mag magm2 ? Secondary minimum photographic magnitude
62 A1 --- u_magm2 Uncertainty flag on VmagmII
64- 66 A3 --- n_T0 Min or Max for Epoch
68- 76 F9.3 d T0 ? Epoch (JD-2400000) of Min or Max
78- 87 F10.6 d Per ? Period
88 A1 --- u_Per Uncertainty flag on Per
90 I1 --- Rem ? Remarks, in remarks.dat file
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Byte-by-byte Description of file: data/*
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Bytes Format Units Label Explanations
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1- 11 F11.3 d JD Julian date
13- 18 F6.3 mag mag Photographic magnitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Apr-2010