J/A+A/379/136 UBVRI photometry of 3 young open clusters (Carraro+, 2001) ================================================================================ An optical and near infrared study of the old open cluster NGC 2141. Carraro G., Patat F. =2001A&A...379..136C ================================================================================ ADC_Keywords: Clusters, open ; Photometry, CCD ; Photometry, UBVRI Keywords: stars: evolution - stars: general - stars: Hertzsprung-Russel (HR) and C-M diagrams - open clusters and associations: individual: NGC 3114 - open clusters and associations: individual: Collinder 228 - open clusters and associations: individual: vdB-Hagen 99 Abstract: In this paper we present and analyze CCD UBVRI photometry in the region of the three young open clusters NGC 3114, Collinder 228, and vdB-Hagen 99, located in the Carina spiral feature. NGC 3114 lies in the outskirts of the Carina nebula. We found 7 star members in a severely contaminated field, and obtain a distance of 950pc and an age less than 3x10^8^yrs. Collinder 228 is a younger cluster (8x10^6^yrs), located in front of the Carina nebula complex, for which we identify 11 new members and suggest that 30% of the stars are probably binaries. As for vdB-Hagen 99, we add 4 new members, confirming that it is a nearby cluster located at 500pc from the Sun and projected toward the direction of the Carina spiral arm. Observations were conducted at La Silla on April 13-16, 1996, with the 0.92m ESO-Dutch telescope. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 10 02 42.7 -60 06 32.1 NGC 3114 10 43 01.3 -60 00 44.8 Collinder 228 10 37 54.2 -59 11 47.1 vdB-Hagen 99 ----------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file ngc3114.dat 102 2060 Photometry of NGC 3114 coll228.dat 102 1112 Photometry of Collinder 228 vdbh99.dat 102 898 Photometry of VdB-Hagen 99 tables.dat 77 21 Photometry of the stars in the field of the open clusters in common with other works (table3, 5 and 7 of the paper) -------------------------------------------------------------------------------- Byte-by-byte Description of file: ngc3114.dat coll228.dat vdbh99.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- ID Identification number in the cluster 6- 13 F8.3 pix Xpos X coordinates (1) 15- 22 F8.3 pix Ypos Y coordinates (1) 24- 30 F7.4 mag Umag ?=99.99 U band magnitude 32- 38 F7.4 mag e_Umag ?=99.99 Error in Umag 40- 46 F7.4 mag Bmag ?=99.99 B band magnitude 48- 54 F7.4 mag e_Bmag ?=99.99 Error in Bmag 56- 62 F7.4 mag Vmag ?=99.99 V band magnitude 64- 70 F7.4 mag e_Vmag ?=99.99 Error in Vmag 72- 78 F7.4 mag Rmag ?=99.99 R band magnitude 80- 86 F7.4 mag e_Rmag ?=99.99 Error in Rmag 88- 94 F7.4 mag Imag ?=99.99 I band magnitude 96-102 F7.4 mag e_Imag ?=99.99 Error in Imag -------------------------------------------------------------------------------- Note (1): The positions are accurate to 1 pixel. 1 pix = 0.44 arcsec. North is up and East is left Coordinates of the centers: NGC 3114 (0.0, 300.0); RA=10 02 42.7 (2000) DE=-60 06 32.1 Collinder 228 (0.0, 300.0); RA=10 43 01.3 (2000) DE=-60 00 44.8 VdB-Hagen 99 (0.0, 0.0); RA=10 37 54.2 (2000) DE=-59 11 47.1 -------------------------------------------------------------------------------- Byte-by-byte Description of file: tables.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 A8 --- Cluster Cluster name (NGC 3114, Col 228 or VdBH 99) 10- 11 I2 --- ID Star number in the cluster 13- 24 A12 --- Oname Other name (1) 26- 34 A9 --- HD HD name 36- 41 F6.3 mag Vmag Present study V magnitude 43- 47 F5.3 mag (B-V) Present study (B-V) colour index 49- 54 F6.3 mag (U-B) ? Present study (U-B) colour index 57- 62 F6.3 mag Vmag2 Other study V magnitude 63- 68 F6.3 mag (B-V)2 Other study (B-V) colour index 70- 75 F6.3 mag (U-B)2 ? Other study (U-B) colour index 77 A1 --- r_Vmag2 Reference for Vmagl, (B-V)l and (U-B)l (2) -------------------------------------------------------------------------------- Note (1): Other names: JM NNN for Jankowitz & McCosh (1963MNSSA..22...18J) list FMF NN = Cl Collinder 228 NN in Simbad Note (2): References for Vmag2, (B-V)2 and (U-B)2: 3: Jankowitz & McCosh, 1963MNSSA..22...18J 5: Feinstein et al., 1976A&AS...24..389F 7: Landolt et al., 1990AJ....100..695L -------------------------------------------------------------------------------- Acknowledgements: Giovanni Carraro References: Patat & Carraro, Bochum 9, 10 and 11, 2001MNRAS.325.1591P Carraro et al., NGC 3324 and Loden 165, 2001A&A...371..107C ================================================================================ (End) Patricia Bauer [CDS] 05-Nov-2001