J/AcA/67/363 New star clusters in the Magellanic system (Sitek+, 2017)
OGLE Collection of Star Clusters. New Objects in the Magellanic Bridge and the
Outskirts of the Small Magellanic Cloud.
Sitek M., Szymanski M.K., Udalski A., Skowron D.M., Kostrzewa-rutkowska Z.,
Skowron J., Karczmarek P., Cieslar M., Wyrzykowski L., Kozlowski S.,
Pietrukowicz P., Soszynski I., Mroz P., Pawlak M., Poleski R., Ulaczyk K.
<Acta Astron., 67, 363-378 (2017)>
=2017AcA....67..363S 2017AcA....67..363S (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Associations, stellar
Keywords: catalogs - galaxies: star clusters: general - surveys
Abstract:
The Magellanic System (MS) encompasses the nearest neighbors of the
Milky Way, the Large (LMC) and Small (SMC) Magellanic Clouds, and the
Magellanic Bridge (MBR). This system contains a diverse sample of star
clusters. Their parameters, such as the spatial distribution, chemical
composition and age distribution yield important information about the
formation scenario of the whole Magellanic System. Using deep
photometric maps compiled in the fourth phase of the Optical
Gravitational Lensing Experiment (OGLE-IV) we present the most
complete catalog of star clusters in the Magellanic System ever
constructed from homogeneous, long time-scale photometric data. In
this second paper of the series, we show the collection of star
clusters found in the area of about 360 square degrees in the MBR and
in the outer regions of the SMC. Our sample contains 198 visually
identified star cluster candidates, 75 of which were not listed in any
of the previously published catalogs. The new discoveries are mainly
young small open clusters or clusters similar to associations.
Description:
The photometric data of the SMC and MBR fields analyzed in this paper
are based on the images gathered during the first five years
(2010-2015) of the fourth phase of the OGLE project (Udalski,
Szymanski and Szymanski 2015AcA....65....1U 2015AcA....65....1U)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 58 75 New star clusters
table2.dat 117 123 Already known star clusters
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name OOGLE-IV name (OGLE-MBR-CL-NNNN or
OGLE-SMC-CL-NNNN)
18- 26 A9 --- Field OGLE-IV field (MBRNNN.NN or SMCNN.NN)
28 I1 h RAh Right ascension (J2000)
30- 31 I2 min RAm Right ascension (J2000)
33- 37 F5.2 s RAs Right ascension (J2000)
39 A1 --- DE- Declination sign (J2000)
40- 41 I2 deg DEd Declination (J2000)
43- 44 I2 arcmin DEm Declination (J2000)
46- 49 F4.1 arcsec DEs Declination (J2000)
51- 52 I2 arcsec RKDE Ssize of the cluster (radius)
54- 56 F3.1 --- Rel Reliability index
58 A1 --- Note [*] Note (1)
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Note (1): *: Object OGLE-MBR-CL-0035 was detected on the edge of the known
association ICA65ne.
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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- 16 A16 --- Name OOGLE-IV name (OGLE-MBR-CL-NNNN or
OGLE-SMC-CL-NNNN)
18- 26 A9 --- Field OGLE-IV field (MBRNNN.NN or SMCNN.NN)
28- 29 I2 h RAh Right ascension (J2000)
31- 32 I2 min RAm Right ascension (J2000)
34- 38 F5.2 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 50 F4.1 arcsec DEs Declination (J2000)
52- 53 I2 arcsec RKDE Size of the cluster (radius)
55-105 A51 --- OName Other name(s) (1)
107-117 A11 --- CType Cluster type (2)
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Note (1): Some of the objects have more than one name or type because of
problems with unambiguous cross-identification.
Note (2): Cluster type as follows:
C = ordinary cluster
CN = cluster in nebula
CA = cluster similar to association
A = ordinary association
AC = association similar to cluster
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 20-Sep-2019