J/A+A/548/A97 Catalogue of variable stars in open clusters (Zejda+, 2012)
Catalogue of variable stars in open clusters.
Zejda M., Paunzen E., Baumann B., Mikulasek Z., Liska J.
<Astron. Astrophys. 548, A97 (2012)>
=2012A&A...548A..97Z 2012A&A...548A..97Z
ADC_Keywords: Stars, variable ; Combined data ; Clusters, open ; Proper motions
Keywords: open clusters and associations: general - catalogs -
stars: variables: general - proper motions
Abstract:
We present the first catalogue of known variable stars in open cluster
regions and with up to two times the given cluster radius. This gives
basic information about the distribution of variable stars in cluster
fields for the complete sky.
Description:
The catalogue of variable stars in open clusters were prepared by
cross-matching of Variable Stars Index (http://www.aavso.org/vsx)
version Apr 29, 2012 (available online, Cat. B/vsx) against the
version 3.1. catalogue of open clusters DAML02 (Dias et al.
2002A&A...389..871D 2002A&A...389..871D, Cat. B/ocl) available on the website
http://www.astro.iag.usp.br/~wilton. The open clusters were divided
into two categories according to their size, where the limiting
diameter was 60 arcmin. The list of all suspected variables and
variable stars located within the fields of open clusters up to two
times of given cluster radius were generated (Table 1). 8938 and 9127
variable stars are given in 461 "smaller" and 74 "larger" clusters,
respectively. All found variable stars were matched against the PPMXL
catalog of positions and proper motions within the ICRS (Roeser et
al., 2010AJ....139.2440R 2010AJ....139.2440R, Cat. I/317). Proper motion data were
included in our catalogue. Unfortunately, a homogeneous data set of
mean cluster proper motions has not been available until now.
Therefore we used the following sources (sorted alphabetically) to
compile a new catalogue: Baumgardt et al. (2000, Cat. J/A+AS/146/251):
based on the Hipparcos catalogue Beshenov & Loktin
(2004A&AT...23..103B 2004A&AT...23..103B): based on the Tycho-2 catalogue Dias et al.
(2001, Cat. J/A+A/376/441, 2002A&A...389..871D 2002A&A...389..871D, Cat. B/ocl): based on
the Tycho-2 catalogue Dias et al. (2006, Cat. J/A+A/446/949): based on
the UCAC2 catalog (Zacharias et al., 2004AJ....127.3043Z 2004AJ....127.3043Z, Cat. I/289)
Frinchaboy & Majewski (2008, Cat. J/AJ/136/118): based on the Tycho-2
catalogue Kharchenko et al. (2005, J/A+A/438/1163): based on the
ASCC2.5 catalogue (Kharchenko, 2001KFNT...17..409K 2001KFNT...17..409K, Cat. I/280)
Krone-Martins et al. (2010, Cat. J/A+A/516/A3): based on the Bordeaux
PM2000 proper motion catalogue (Ducourant et al., 2006A&A...448.1235D 2006A&A...448.1235D,
Cat. I/300) Robichon et al. (1999, Cat. J/A+A/345/471): based on the
Hipparcos catalogue van Leeuwen (2009A&A...497..209V 2009A&A...497..209V): based on the
new Hipparcos catalogue. In total, a catalogue of proper motions for
879 open clusters (Table 2), from which 436 have more than one
available measurement, was compiled.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 350 18065 Variable stars in open clusters
table2.dat 39 879 Mean proper motion of open clusters
refs.dat 130 81 References for proper motions and radial velocities
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See also:
B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-12)
B/ocl : Optically visible open clusters and Candidates (Dias+ 2002-12)
I/289 : UCAC2 Catalogue (Zacharias+ 2004)
I/280 : All-sky Compiled Catalogue of 2.5 million stars
(Kharchenko+ 2009)
I/300 : PM2000 Bordeaux Proper Motion catalogue (Ducourant+, 2006)
I/317 : The PPMXL Catalog (Roeser+ 2010)
J/A+A/345/471 : Memberships of open clusters (Robichon+, 1999)
J/A+AS/146/251 : Open clusters absolute proper motions. I. (Baumgardt+, 2000)
J/A+A/376/441 : Absolute proper motions of 112 open clusters (Dias+, 2001)
J/A+A/438/1163 : Catalogue of Open Cluster Data (COCD) (Kharchenko+, 2005)
J/A+A/446/949 : Open clusters proper motions based on UCAC2 (Dias+, 2006)
J/AJ/136/118 : Open clusters as galactic disk tracers. I. (Frinchaboy+, 2008)
J/A+A/516/A3 : Proper motions of PM2000 open clusters (Krone-Martins+, 2010)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- VSNo Number of star in the catalogue,
[LS]NNNNN (1)
8- 36 A29 --- Name Name of variable star
38- 56 A19 --- PPMXL Identifier of star in PPMXL catalogue (I/317)
58- 66 F9.5 deg RAdeg VS Right ascension (J2000)
68- 76 F9.5 deg DEdeg VS Declination (J2000)
78- 83 F6.1 mas/yr pmRA ? Proper Motion of variable in RA*cos(DE)
85- 91 F7.1 mas/yr pmDE ? Proper Motion of variable in Declination
92- 95 F4.1 mas/yr e_pmRA ? Mean error of proper motion
in pmRA*cos(DE)
97-100 F4.1 mas/yr e_pmDE ? Mean error of proper motion in DE
102 I1 -- Npm ? Number of measurements used to derive mean
proper motion
104-105 I2 --- Fpm ? Proper motion determination (bitwise or
number) (2)
107-130 A24 --- Type Variability type (see B/vsx)
132 A1 --- l_Max Limit flag on max
133-138 F6.3 mag Max ? Magnitude at maximum, or amplitude
140 A1 --- u_Max Uncertainty flag on max
141-143 A3 --- n_Max Passband on max magnitude (3)
145 A1 --- f_Min [(] '(' indicates an amplitude
146 A1 --- l_Min Limit flag on min
147-152 F6.3 mag Min ? Magnitude at minimum, or amplitude (f_Min)
154 A1 --- u_Min Uncertainty flag on min
155-157 A3 --- n_Min Passband on min magnitude (3)
159-170 F12.4 d T0 ? Epoch of maximum or minimum (HJD)
172 A1 --- u_T0 [:] Uncertainty flag on epoch
173 A1 --- l_Per [<>(] Limit flag on period (4)
174-187 F14.9 d Per ? Period of the variable in days
188-190 A3 --- u_Per [:)/N ] Uncertainty flag on Period (4)
193-198 F6.2 arcmin DVSm Distance to the center of open cluster
200-205 F6.2 % DVSp Distance to the center of open cluster,
in percent of open cluster apparent radius
207-223 A17 --- OCL Name of open cluster (OC)
225-233 F9.6 h RAOC Right ascension (J2000.0) of OC centre
235-244 F10.6 deg DEOC Declination (J2000.0) of OC centre
246-248 A3 --- Flag2 ? Note to open cluster (5)
250-254 F5.1 arcmin Diam Apparent diameter of open cluster
256-259 I4 pc d ? Distance of open cluster
261-265 F5.3 mag E(B-V) ? Colour excess in (B-V)
267-271 F5.3 [yr] logAge ? Age of open cluster (in log t)
273-275 I3 --- Nc ? Estimated number of members in the cluster
277-282 F6.2 mas/yr OCpmRA ? Mean proper motion of the cluster in
muα.cos(δ), ICRS
284-287 F4.2 mas/yr e_OCpmRA ? Standard deviation in pmRA, ICRS
289-294 F6.2 mas/yr OCpmDE ? Mean proper motion of the cluster in
muδ, ICRS
296-299 F4.2 mas/yr e_OCpmDE ? Standard deviation in pmRA and pmDE, ICRS
301-302 I2 --- NOCpm ? Number of stars used to derive mean
cluster proper motion
304 A1 --- Ref1 [DZ] Reference to proper motion:
D (see DAML 02 catalogue, B/ocl) or
Z (see Table 2 in this paper)
306-312 F7.2 km/s OCRV ? Mean cluster radial velocity
314-318 F5.2 km/s e_OCRV ? Error of radial velocity
320-321 I2 --- o_OCRV ? Number of stars used to derive mean
cluster RV
323-326 A4 --- r_OCRV ? Reference to radial velocity, from DAML02,
in refs.dat file
328-333 F6.3 [-] OCm ? Mean cluster metallicity
335-338 F4.2 [-] e_OCm ? Error of metallicity
340-341 I2 --- o_OCm ? Number of stars used to determine mean
cluster metallicity
343-350 A8 --- TrTyp ? Trumpler classification of cluster
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Note (1): Prefixes "S" or "L" for a star located in open cluster
smaller or larger than 60 arcmin, respectively.
Note (2): See the article sect. 2; Bitwise or number,
where each bit number (i) has the meaning:
#0 (1) = if set, one of the coordinates had an excessively large χ2
#1 (2) = Row is from PPMXL (Roeser 2008, I/312). These objects are
mostly Tycho stars that were masked out of USNO-B.
#2 (4) = Row is from PPMXL (Roeser 2008, I/312) and replaces a single
row from USNO-B. This is done when the astrometry from PPMX
was better (in terms of error estimates) than the astrometry
of the corresponding PPMXL object.
#3 (8) = Row replaces multiple USNO-B1.0 objects. When PPMX contains
an object that has more than one counterpart in PPMXL, all
such counterparts are discarded on the assumption that they
should have been matched in USNO-B1.0 or result from
erroneous matches. For these rows, bit#1 is always 1.
For details see Roeser (2010, Cat. I/317).
Note (3): Used designation of passbands (taken from VSX catalogue):
U B V R I = Johnson broad-band
J H K L M = Johnson infra-red (1.2, 1.6, 2.2, 3.5, 5µm)
Rc Ic = Cousins' red and infra-red
u v b y = Stroemgren intermediate-band
u'g'r'i'z' = Sloan (SDSS)
pg pv bj rf = photographic blue (pg, bj) visual (pv), red (rf)
w C CR CV = white (clear); R or V used for comparison star.
R1 = ROTSE-I (450-1000nm)
Hp T = Hipparcos and Tycho (Cat. I/239)
NUV = near-UV
Note (4): Notes to the period value taken from VSX catalogue:
The value of the period may be preceded by ">" or "<" if the
period is a lower or upper limit, respectively, or by a "(" which
indicates that the period is the mean cycle time of a U Gem or
recurrent nova (a closing bracket exists in u_Period).
The value of the period may be followed by the following symbols:
: = uncertainty flag
) = value of the mean cycle for U Gem or recurrent nova
(the corresponding opening bracket exists in l_Period)
*N = the real period is likely a multiple of the quoted period
/N = the period quoted is likely a multiple of the real period
Note (5): Notes to open cluster as given in DAML v3.2:
e = embedded open cluster (or cluster associated with nebulosity)
n = "non-existent NGC" (RNGC, Sulentic & Tifft 1979, Cat. VII/1). Some of
Bica's POCRs are also "non-existent NGC" objects.
o = possible OB association ( or detached part of )
p = POCR (Possible Open Cluster Remnant) - Bica et al. 2001A&A...366..827B 2001A&A...366..827B
v = clusters with variable extinction (Ahumada et al. 2001A&A...377..845A 2001A&A...377..845A)
r = recovered: "non-existent NGC" that are well visible in the DSS images
inspection
d = dubious: objects considered doubtful by the DSS images inspection
nf = not found: objects not found in the DSS images inspection (wrong
coordinates?)
cr = Cluster Remnant (Pavani & Bica, 2007A&A...468..139P 2007A&A...468..139P)
OC? = possible cluster (Kronberger M, private communication)
OC = likely cluster (Kronberger M, private communication)
IR = discovered in infra-red but are visible in the DSS images inspection
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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- 17 A17 --- OCL Name of the cluster
19- 23 F5.1 mas/yr OCpmRA Proper Motion in in RA*cos(DE)
25- 27 F3.1 mas/yr e_OCpmRA Mean error of proper motion in OCpmRA*cos(DE)
29- 33 F5.1 mas/yr OCpmDE Proper Motion in declination
35- 37 F3.1 mas/yr e_OCpmDE Error of proper motion in declination
39 I1 --- N Number of measurements used to derive mean
proper motion
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Ref Reference code
8- 26 A19 --- BibCode Bibcode of the references
28-130 A103 --- Text Author(s) names and comments
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Acknowledgements:
Miloslav Zejda, zejda(at)physics.muni.cz
Dept. of Theor. Phys. and Astrophysics, MU Brno
(End) Miloslav Zejda [MU Brno], Patricia Vannier [CDS] 29-Aug-2012