J/A+A/409/541 UBV photometry of IC 2395 (Claria+, 2003) ================================================================================ IC 2395 and BH 47: only one open cluster in the Vela constellation Claria J.J., Lapasset, E., Piatti, A.E., Ahumada, A.V. =2003A&A...409..541C ================================================================================ ADC_Keywords: Clusters, open ; Photometry, UBV Keywords: methods: observational - techniques: photometric - stars: fundamental parameters - open clusters and associations: individual: IC 2395, BH 47 Abstract: We report UBV photoelectric photometry for 273 stars in the fields of the open clusters IC 2395 and BH 47. Our postulate is that, rather than two different clusters in this region of Vela, there is only one, which we call IC 2395 = BH 47. The cluster is centered at about RA = 8h 42min 33s, and DE = -48{deg} 06' 48" (2000), its angular diameter being ~19'. The analysis of the photometric data yields 61 probable cluster members and 16 possible members. Photometric membership probabilities show good agreement with those obtained from a proper motion study for 21 stars in common. The reddening across the cluster appears to be uniform, the mean E(B-V) value being 0.09+/-0.02. The true distance modulus is V_0_-Mv=9.52+/-0.10, corresponding to a distance from the Sun of (800+/-40)pc and 48pc below the Galactic plane. The cluster age, determined by fitting isochrones with core overshooting, turns out to be (6+/-2)Myr. There is a strong likelihood that IC 2395 = BH 47 is physically connected to the Vela OB1C association. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 08 42 33 -48 06 48 IC 2395 = Cl VDBH 47 ----------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 93 273 UBV photometry and coordinates -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 -- Seq Star number 5- 7 I3 pix Xpos X coordinates 9- 11 I3 pix Ypos Y coordinates 13- 14 I2 h RAh Hours of Right Ascension (J2000) 16- 17 I2 min RAm Minutes of Right Ascension (J2000) 19- 20 I2 s RAs Seconds of Right Ascension (J2000) 22 A1 --- DE- Declination sign (J2000) 23- 24 I2 deg DEd Degrees of declination (J2000) 26- 27 I2 arcmin DEm Minutes of declination (J2000) 29- 30 I2 arcsec DEs Seconds of declination (J2000) 32- 37 F6.3 mag Vmag V magnitude 39- 44 F6.3 mag B-V (B-V) colour index 46- 51 F6.3 mag U-B (U-B) colour index 53 I1 -- o_Vmag Number of measurements 55- 75 A21 -- Name Names in different catalogs 77- 87 A11 -- SpType Spectral type and luminosity class 89- 90 A2 -- Member [PNM ] Membership status (M, PM, NM) 92- 93 I2 % PMemb ? Membership probability -------------------------------------------------------------------------------- Acknowledgements: Juan J. Claria ================================================================================ (End) Patricia Bauer [CDS] 28-Jul-2003