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J/AJ/137/94         Star clusters in M31                       (Caldwell+, 2009)

Star clusters in M31. I. A catalog and a study of the young clusters. Caldwell N., Harding P., Morrison H., Rose J.A., Schiavon R., Kriessler J. <Astron. J., 137, 94-110 (2009)> =2009AJ....137...94C
ADC_Keywords: Galaxies, nearby ; Associations, stellar Keywords: catalogs - galaxies: individual (M31) - galaxies: star clusters - globular clusters: general Abstract: We present an updated catalog of 1300 objects in the field of M31, including 670 likely star clusters of various types, the rest being stars or background galaxies once thought to be clusters. The coordinates in the catalog are accurate to 0.2", and are based on images from the Local Group Survey (LGS) or from the Digitized Sky Survey (DSS). Archival Hubble Space Telescope (HST) images and the LGS were inspected to confirm cluster classifications where possible, but most of the classifications are based on spectra taken of ∼1000 objects with the Hectospec fiber positioner and spectrograph on the 6.5m MMT. Description: The Hectospec multifiber positioner and spectrograph are ideally suited for this project, in that its usable field is 1 deg in diameter, and the instrument itself is mounted on the 6.5m MMT telescope. We obtained data in observing runs in the years 2004-2007. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 72 660 Cleaned cluster catalog table2.dat 66 141 Young clusters, ordered by mass table3.dat 64 291 Stars table4.dat 64 134 Possible stars table5.dat 47 208 Galaxies
See also: J/AcA/48/455 : Globular Clusters in M31 and M33 (Mochejska+, 1998) J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000) J/AJ/122/2458 : M31 globular clusters from HST (Barmby+, 2001) J/ApJ/559/851 : Young star cluster candidates in M31 (Williams+, 2001) J/AJ/123/2490 : RV and [Fe/H] of M31 globular cluster system (Perrett+, 2002) J/A+A/416/917 : M31 globular clusters Revised Bologna Catalog (Galleti+, 2004) J/A+A/471/127 : New globular clusters in M31 (Galleti+, 2007) J/PASP/119/7 : HST WFPC2 star clusters in M31 (Krienke+, 2007) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Object name 18 A1 --- f_Name [defg] Discrepent classifications (1) 19- 20 I2 h RAh Hour of Right Ascension (J2000) 22- 23 I2 min RAm Minute of Right Ascension (J2000) 25- 29 F5.2 s RAs Second of Right Ascension (J2000) 30 A1 --- DE- Sign of Declination (J2000) 31- 32 I2 deg DEd Degree of Declination (J2000) 34- 35 I2 arcmin DEm Arcminute of Declination (J2000) 37- 40 F4.1 arcsec DEs Arcsecond of Declination (J2000) 42- 46 F5.2 mag Vmag ? V band magnitude 48- 51 F4.2 mag e_Vmag ? Uncertainty in Vmag 53- 58 A6 --- Type Rough age classification (2) 60- 61 A2 --- sV Source of velocity (3) 63- 66 F4.1 arcsec a_Vmag ? Aperture size for Vmag observation 68 A1 --- sP Source of photometry (G4) 70- 72 A3 --- sC Source of classification as cluster (5)
Note (1): Flag on Name, defined as follows: d = not a cluster in Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) e = not a cluster in Crampton et al. (1985ApJ...288..494C) f = not a cluster in Racine (1991AJ....101..865R) g = Dubath & Grillmair (1997A&A...321..379D) probably observed a different object Note (2): For objects with good quality spectra. young = age less than 1Gyr interm = age between 1 and 2Gyr old = age greater than 2Gyr Note (3): Source of velocity, defined as follows: HS = this paper B = Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) P = Perrett et al. (2002AJ....123.2490P, Cat. J/AJ/123/2490) Note (5): objects with blank entries in this column and in the velocity source column should still be considered "candidates". Flags as follows: S = spectrum from this paper indicates a cluster L = LGS image indicates non-stellar H = HST image indicates a cluster
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Object name 19- 27 A9 --- f_Name Discrepent classification (1) 29- 32 F4.2 mag E(B-V) Reddening toward cluster 34- 39 F6.1 km/s Vel Cluster velocity 41- 42 I2 km/s e_Vel Uncertainty in Vel 44- 46 F3.1 [yr] logAge Log of cluster age 48- 50 F3.1 [Msun] logM Log of cluster mass 52- 54 F3.1 --- chi2 Fitting procedure χ2 56- 66 A11 --- Com Additional comment(s)
Note (1): Flag on Name, defined as follows: a = Not a cluster in Cohen et al. (2005ApJ...634L..45C) b = Star in field c = Noted as young in van den Bergh (1969ApJS...19..145V) d = Noted as young in Hodge (1979AJ.....84..744H) e = Noted as young in Elson & Walterbos (1988ApJ...333..594E) f = Noted as young in Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) g = Noted as young in Fusi Pecci et al. (2005AJ....130..554F) h = Noted as young in Burstein et al. (2004ApJ...614..158B) i = Noted as young in Beasley et al. (2004AJ....128.1623B) j = Noted as young in Williams & Hodge (2001ApJ...559..851W, Cat. J/ApJ/559/851)
Byte-by-byte Description of file: table[34].dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Object name (1) 12 A1 --- f_Name [efgh] Discrepent classification (2) 14 I1 h RAh Hour of Right Ascension (J2000) 16- 17 I2 min RAm Minute of Right Ascension (J2000) 19- 23 F5.2 s RAs Second of Right Ascension (J2000) 24 A1 --- DE- Sign of Declination (J2000) 25- 26 I2 deg DEd Degree of Declination (J2000) 28- 29 I2 arcmin DEm Arcminute of Declination (J2000) 31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000) 36- 41 F6.1 km/s Vel ? Velocity from Hectospec 43- 44 I2 km/s e_Vel ? Uncertainty in Vel 46- 50 F5.2 mag Vmag ? V band magnitude 52- 55 F4.2 mag e_Vmag ? Uncertainty in Vmag 57 A1 --- sP Source of photometry (G4) 59- 61 A3 --- sC Source of classification as a star (G5) 63- 64 A2 --- sV Source of velocity, only for table4.dat (3)
Note (1): The suffix "x" indicates that coords correspond to a real object, but which was wrongly identified in the initial input catalog. Note (2): Flag on Name, defined as follows: e = NB61 is an M star, the velocity of -646 listed in Galleti et al. (2007A&A...471..127G, Cat. J/A+A/471/127) was likely the result of a velocity template mismatch. f = Multiple stars or asterisms in M31. g = The velocity of this F supergiant star indicates is it probably a member of the M31 giant stream. Details to be presented in a subsequent paper. h = The colors of SK106A indicate it is an M star, the velocity of -890 km/s reported in Kim et al. (2007AJ....134..706K, Cat. J/AJ/134/706) was likely the result of a velocity template mismatch (see also Lee et al. 2008ApJ...674..886L). Note (3): Source of velocity, defined as follows: HS = this paper B = Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) K = Kim et al. (2007, Cat. J/AJ/134/706) P = Perrett et al. (2002AJ....123.2490P, Cat. J/AJ/123/2490)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 15 A15 --- Name Object name 17 A1 --- f_Name [b] Discrepent class (1) 19 I1 h RAh Hour of Right Ascension (J2000) 21- 22 I2 min RAm Minute of Right Ascension (J2000) 24- 28 F5.2 s RAs Second of Right Ascension (J2000) 29 A1 --- DE- Sign of Declination (J2000) 30- 31 I2 deg DEd Degree of Declination (J2000) 33- 34 I2 arcmin DEm Arcminute of Declination (J2000) 36- 39 F4.1 arcsec DEs Arcsecond of Declination (J2000) 41- 47 F7.5 --- z ? Hectospec redshift (2)
Note (1): Perrett et al. (2002AJ....123.2490P, Cat. J/AJ/123/2490) had velocity indicating M31 membership. Note (2): All redshifts from Hectospec. Median velocity error is 17km/s. Entries without redshifts were classified background based on images.
Global Notes: Note (G4): Source of photometry, defined as follows: L = this paper; B = Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) G = Galleti et al. (2007A&A...471..127G, Cat. J/A+A/471/127) H = Huxor et al. (2005MNRAS.360.1007H) Note (G5): Source of classification as a star, defined as follows: S = spectrum from this paper exists, indicates a star or is inconclusive L = LGS image indicates stellar FWHM B = Barmby et al. (2000AJ....119..727B, Cat. J/AJ/119/727) indicated a star
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 22-Jun-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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