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J/MNRAS/402/803      M31 globular cluster system             (Peacock+, 2010)

The M31 globular cluster system: ugriz and K-band photometry and structural parameters. Peacock M.B., MacCarone T.J., Knigge C., Kundu A., Waters C.Z., Zepf S.E., Zurek D.R. <Mon. Not. R. Astron. Soc., 402, 803-818 (2010)> =2010MNRAS.402..803P
ADC_Keywords: Galaxies, nearby ; Clusters, globular ; Photometry, SDSS Keywords: globular clusters: general - galaxies: individual: M31 - galaxies: star clusters Abstract: We present an updated catalogue of M31 globular clusters (GCs) based on images from the Wide Field Camera (WFCAM) on the United Kingdom Infrared Telescope and from the Sloan Digital Sky Survey (SDSS). Our catalogue includes new, self-consistent ugriz and K-band photometry of these clusters. We discuss the difficulty of obtaining accurate photometry of clusters projected against M31 due to small-scale background structure in the galaxy. We consider the effect of this on the accuracy of our photometry and provide realistic photometric error estimates. We investigate possible contamination in the current M31 GC catalogues using the excellent spatial resolution of these WFCAM images combined with the SDSS multicolour photometry. We identify a large population of clusters with very blue colours. Most of these have recently been proposed by other works as young clusters. We distinguish between these, and old clusters, in the final classifications. Our final catalogue includes 416 old clusters, 156 young clusters and 373 candidate clusters. We also investigate the structure of M31's old GCs using previously published King model fits to these WFCAM images. We demonstrate that the structure and colours of M31's old GC system are similar to those of the Milky Way. One GC (B383) is found to be significantly brighter in previous observations than observed here. We investigate all of the previous photometry of this GC and suggest that this variability appears to be genuine and short lived. We propose that the large increase in its luminosity may have been due to a classical nova in the GC at the time of the previous observations in 1989. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 175 1595 Photometry and structural parameters of M31 GCs
See also: J/A+A/416/917 : Revised Bologna Catalog of M31 GCs (Galleti+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 18 A18 --- Name Name taken from the RBC, Galleti et al., 2004, Cat. J/A+A/416/917 (1) 20- 30 A11 --- OName Other names from RBV (J/A+A/416/917) 32- 39 F8.5 deg RAdeg Right ascension in decimal degrees (J2000) (2) 41- 48 F8.5 deg DEdeg Declination in decimal degrees (J2000) (2) 50 I1 --- f Classification of the globular cluster (3) 51- 57 A7 --- n_f Additional classification for galaxies 59 I1 --- f1 ?=- Classification from the RBC V3.5 (3) 61- 69 A9 --- f2 Classification from Calwell et al., 2009AJ....137...94C 71- 74 F4.1 arcsec Rg ?=99.00 Aperture size used to obtain total g magnitude 76- 80 F5.2 mag gmag ?=99.00 g magnitude 82- 86 F5.2 mag u-g ?=99.00 u-g colour index 88- 92 F5.2 mag g-r ?=99.00 g-r colour index 94- 98 F5.2 mag r-i ?=99.00 r-i colour index 100-104 F5.2 mag i-z ?=99.00 i-z colour index 107-111 F5.2 mag e_gmag ?=99.00 rms uncertainty on g total magnitude, includes the statistical, calibration and systematic errors 113-117 F5.2 mag e_u-g ?=99.00 rms uncertainty on u-g 119-123 F5.2 mag e_g-r ?=99.00 rms uncertainty on g-r 125-129 F5.2 mag e_r-i ?=99.00 rms uncertainty on r-i 131-135 F5.2 mag e_i-z ?=99.00 rms uncertainty on i-z 137-140 F4.1 arcsec RKs ?=99.00 Aperture size used to obtain total Ks magnitude 142-146 F5.2 mag Ksmag ?=99.00 Ks magnitude 148-152 F5.2 mag e_Ksmag ?=99.00 rms uncertainty on Ksmag 154-158 F5.2 --- c ?=99.00 Concentration parameter (C=log(rt/r0), r0 = core radius) 160-164 F5.2 pc rh ?=99.00 Half-light radius (4) 166-169 F4.1 pc rt ?=99.0 Tidal radius (4) 171-175 F5.2 [solLum/pc3] log(rho0) ?=99.00 Cluster core density (in LK(☉)/pc3 units)
Note (1): Sources identified as M31GC JHHMMSS+DDMMSS in Simbad. Note (2): Position of object in SDSS r-band image Note (3): Classification as follows: 1 = old globular cluster 2 = candidate cluster (21-candidate old cluster, 23-candidate young cluster) 3 = young cluster 4 = galaxy 5 = HII region 6 = stellar source Note (4): assuming the distance of M31 to be 780kpc: McConnachie et al. (2005MNRAS.356..979M)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Jul-2010
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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