J/AJ/112/2004 CCD photometry of SMC cluster Kron 3 (Alcaino+ 1996) ================================================================================ Multicolor CCD photometry of the SMC cluster Kron 3 Alcaino G., Liller W., Alvarado F., Kravtsov V., Ipatov A., Samus N., Smirnov O. =1996AJ....112.2004A (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Photometry, CCD ; Clusters, open Abstract: We present BVRI CCD photometry of 3149 stars in the SMC populous cluster Kron 3. Radial dependence of the horizontal branch morphology has been revealed. Contrary to Rich et al. (1984ApJ...286..517R), we conclude that the cluster radius is about r=6'. We estimate the cluster metallicity as [Fe/H]=-1.26 and its apparent distance modulus as (m-M)=18.75mag. Our estimate of the cluster age, based on fitting isochrones of VandenBerg & Bell (1985ApJS...58..561V) to our V-(B-V) and V-(V-R) diagrams, is about 10Gyr, the lower limit being 8Gyr; this values is greater than those derived earlier, presumably partially due to the distance modulus values used by earlier investigators being too large. Our age estimate is not far from the upper values from Righ et al. (1984ApJ...286..517R). Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 00 24 46.3 -72 47 37 Kron 3 = Lindsay 8 ----------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3 51 3149 CCD photometry in Kron 3 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 2- 5 I4 --- Seq Running number 7- 14 F8.3 pix Xpos x coordinate (along RA, increases to the east) 16- 23 F8.3 pix Ypos y coordinate (along DE, increases to the north) 25- 30 F6.3 mag Vmag V magnitude 32- 37 F6.3 mag B-V B-V color index 39- 44 F6.3 mag V-R ? V-R color index 46- 51 F6.3 mag V-I *? V-I color index -------------------------------------------------------------------------------- Note on V-I: this column in the printed paper is inadvertently labelled "R-I". -------------------------------------------------------------------------------- Acknowledgements: It is a pleasure to thank Prof. Nikolai N. Samus for providing a copy of Table3 to CDS. ================================================================================ (End) Francois Ochsenbein [CDS] 16-Dec-1996