J/AcA/50/221 Astrometry of variable stars in M 3 (Bakos+, 2000)
Identification and astrometry of variable stars in M 3.
Bakos G.A., Benko J.M., Jurcsik J.
<Acta Astron., 50, 221 (2000)>
=2000AcA....50..221B 2000AcA....50..221B
ADC_Keywords: Clusters, globular ; Stars, variable
Keywords: stars: variables: general - stars: variables: RR Lyr - astrometry -
globular clusters: individual: M3
Abstract:
We present identification and astrometry of all previously known or
suspected variables along with the discovery of six new variables in
the globular cluster M3. The number of the catalogued variables
increased to 274 by including all the confirmed, previously known
variables and the new discoveries. The precise and homogeneous
astrometry, as well as the clarification of misapprehensions in the
preceding identifications are done by using overlapping fields from a
wide-field Schmidt-camera, 1-m RCC telescope, and HST archive
observations from the center of the cluster. The astrometric positions
can serve as a direct input to any photometry which needs the accurate
centers of the variables.
Objects:
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RA (2000) DE Designation(s)
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13 42 11 +28 22.5 M3 = NGC 5272
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 74 308 List of variables and suspected variables in M3
notes.dat 80 141 Individual notes
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See also:
I/278 : Catalog of stars in M3 (von Zeipel, 1908)
V/97 : Updated 3rd Catalog of Variable Stars in Globular Clusters
(Clement+ 1997)
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
J/AJ/108/1786 : Blue stragglers + variable stars in M3 (Guhathakurta+, 1994)
J/PAZh/20/693 : Identification and coordinates in NGC 5272 (Evstigneeva+ 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/274]=+? Sequential number (1)
4 A1 --- m_Seq [abcns] Multiplicity index on Seq (1)
6- 14 A9 --- VType Variable type
16- 23 F8.3 s ORAs ? Offset in right ascension, in sec (2)
25- 33 F9.3 arcsec ORA ? Offset in right ascension, in arcsec (2) (3)
34- 42 F9.3 arcsec ODE ? Offset in declination (2)
43 A1 --- Tel [RHSE] Telescope (4)
45- 48 A4 --- Com Comments (5)
51- 67 A17 --- OName Cross-identification (6)
69- 74 A6 --- Note Indicates notes in notes.dat file
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Note (1): Numeric identification 1 to 238 were listed in Clement (1998,
Cat. V/97), Cl* NGC 5272 SAW VNNN in Simbad, and 239 to 274 is added
in this work. If the star turned out to be double in HST images,
notation is split to "a,b . . . ", etc. The same notation is used if
there are more than one candidates.
Note (2): Center for M3 is adopted from Harris (1996, Cat. VII/195):
RA=13h42m11.2s, DE=+28°22'32" (J2000.0)
Note (3): This column is given for compatibility with previous works,
assuming a projection from seconds to arcseconds using the accepted
center of the cluster.
Note (4): Telescope used for identification as follows:
H = HST/WFPC2
R = RCC
S = Schmidt
E = coordinates from Evstigneeva et al. (1994, Cat. J/PAZh/20/693)
Note (5): Comments as follows:
c = extra comment on the star
d = double star
e = on the edge of frame
f, f? = variability confirmed and suspected from corresponding
RCC variability image and light curve
i = identification problems
j, j? = variability confirmed and suspected in Schmidt images,
not variable in Schmidt images
m = merging with closeby star
n = variability not detected in RCC images
Note (6): Cross-identifications as follows:
X = Kholopov (1963PZ.....14..275K 1963PZ.....14..275K), Kholopov (1977PZ.....20..313K 1977PZ.....20..313K),
Cl* NGC 5272 X NN in Simbad
KG = Kadla and Gerashchenko (1980ATsir1123....1K 1980ATsir1123....1K),
Cl* NGC 5272 KG NN in Simbad
GU = Guhathakurta et al. (1994, Cat. J/AJ/108/1786),
Cl* NGC 5272 GYB NNNN
S = Sandage (1953AJ.....58...61S 1953AJ.....58...61S), CL* NGC 5272 S NNNNN in Simbad
Sh = Shapley (1914ApJ....40..443S 1914ApJ....40..443S)
vZ = von Zeipel (1908, Cat. I/278), NGC 5272 NNNN in Simbad
B = present work.
The vZ and Sandage numbers were omitted, if not crucial.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Note Note code
8- 80 A73 --- Text Text of the note
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 27-Jun-2003