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J/ApJS/173/643     GALEX UV photometry of M31 Globular Clusters     (Rey+, 2007)

GALEX ultraviolet photometry of globular clusters in M 31: three-year results and a catalog. Rey S.-C., Rich R.M., Sohn S.T., Yoon S.-J., Chung C., Yi S.K., Lee Y.-W., Rhee J., Bianchi L., Madore B.F., Lee K., Barlow T.A., Forster K., Friedman P.G., Martin D.C., Morrissey P., Neff S.G., Schiminovich D., Seibert M., Small T., Wyder T.K., Donas J., Heckman T.M., Milliard B., Szalay A.S., Welsh B.Y. <Astrophys. J. Suppl. Ser., 173, 643-658 (2007)> =2007ApJS..173..643R
ADC_Keywords: Clusters, globular ; Photometry, ultraviolet Keywords: galaxies: individual (M31) - galaxies: star clusters - globular clusters: general - ultraviolet: galaxies Abstract: We present ultraviolet (UV) photometry of M31 globular clusters (GCs) found in 23 Galaxy Evolution Explorer (GALEX) images covering the entirety of M31. We detect 485 and 273 GCs (and GC candidates) in the near-ultraviolet (NUV) and far-ultraviolet (FUV), respectively. The UV properties of GCs have been analyzed using various combinations of UV-optical and optical-optical colors. Comparing M31 data with those of Galactic GCs in the UV with the aid of population models, we find that the age ranges of old GCs in M31 and the Galactic halo are similar. Three metal-rich ([Fe/H]>-1) GCs in M31 produce significant FUV flux making their FUV-V colors unusually blue for their metallicities. These are thought to be analogs of the two peculiar Galactic GCs, NGC 6388 and NGC 6441, with extended blue HB stars. We detect 12 (10) intermediate-age GC candidates in NUV (FUV) identified by previous spectroscopic observations. On the basis of comparing our UV photometry to population models, we suggest that some of spectroscopically identified intermediate-age GCs may not be truly intermediate in age, but rather older GCs that possess developed HB stars which contribute to enhanced UV flux as well as Balmer lines. Description: The M31 images were obtained as part of the Nearby Galaxy Survey (NGS) carried out by GALEX in two UV bands: FUV (135-175nm) and NUV (175-275nm). Details on the early observations of 14 fields released under the GALEX Release 1 (GR1) can be found in Thilker et al. (2005ApJ...619L..67T) and Paper I (Rey et al., 2005ApJ...619L.119R). We have observed an additional nine GALEX fields in 2004 September-November, which are included in the GALEX Release 2 (GR2). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 144 501 UV and optical photometry of M31 globular clusters and candidates
See also: J/AJ/119/727 : M31 globular clusters photometry (Barmby+, 2000) J/AJ/122/2458 : M31 globular clusters from HST (Barmby+, 2001) J/A+A/416/917 : M31 globular clusters Revised Bologna Catalog (Galleti+ 2004) J/A+A/449/143 : Photometry of M31 globular cluster candidates (Ma+, 2006) J/A+A/483/769 : HST VI photometry of 3 GC in M31 (Fuentes-Carrera+ 2008) J/MNRAS/392/L55 : M31 GC clusters Kmag + structural param. (Peacock+ 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- RBC Revised Bologna Catalog identification (Cat. J/A+A/416/917) 8- 15 A8 --- [BHB2000] Barmby et al. (2000, Cat. J/AJ/119/727) identification 17- 27 A11 --- NEDname The NED identification 29 I1 --- Q [1,3] RBC classification quality flag (1) 31- 32 I2 h RAh Hour of Right Ascension (J2000) 34- 35 I2 min RAm Minute of Right Ascension (J2000) 37- 41 F5.2 s RAs Second of Right Ascension (J2000) 43 A1 --- DE- Sign of the Declination (J2000) 44- 45 I2 deg DEd Degree of Declination (J2000) 47- 48 I2 arcmin DEm Arcminute of Declination (J2000) 50- 53 F4.1 arcsec DEs Arcsecond of Declination (J2000) 55- 60 F6.3 mag NUV ? GALEX NUV band (175-275nm) magnitude (2) 62- 66 F5.3 mag e_NUV ? Error in NUVmag 68- 73 F6.3 mag FUV ? GALEX FUV band (135-175nm) magnitude (2) 75- 79 F5.3 mag e_FUV ? Error in NUVmag 81- 85 F5.2 mag Umag ? RBC U band magnitude 87- 91 F5.2 mag Bmag ? RBC B band magnitude 93- 97 F5.2 mag Vmag ? RBC V band magnitude 99-103 F5.2 mag Rmag ? RBC R band magnitude 105-109 F5.2 mag Imag ? RBC I band magnitude 111-115 F5.2 mag Jmag ? RBC J band magnitude 117-121 F5.2 mag Hmag ? RBC H band magnitude 123-127 F5.2 mag Kmag ? RBC K band magnitude 129-133 F5.2 [-] [Fe/H] ? Barmby et al. (2000, Cat. J/AJ/119/727) metallicity 135-138 F4.2 [-] e_[Fe/H] ? Error in [Fe/H] 140-144 F5.2 km/s Res ? Morrison et al. (2004ApJ...603...87M) kinematic velocity residual
Note (1): The class is: 1 = confirmed GC; 2 = candidate cluster; 3 = uncertain candidate. Note (2): As shown in Figure 1, each GALEX image overlaps with at least another image. For objects that lie in these overlapping fields, we have listed their mean magnitudes weighted by their photometric errors.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 28-May-2009
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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