J/A+AS/122/111 Berkeley 64 and 69 stars UBVRI photometry (Pandey+, 1997) ================================================================================ Stellar contents of the open clusters Be 64 and Be 69 Pandey A.K., Durgapal A.K., Bhatt B.C., Mohan V., Mahra H.S. =1997A&AS..122..111P (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Clusters, open ; Photometry, UBVRI Keywords: open clusters: Be 64; Be 69 - HR diagram Abstract: We present UBVRI CCD photometry for previously unstudied open clusters (Be 64 and Be 69). Photometry has also been carried out for nearby fields to correct f or the effects of field stars contamination. From the colour-colour diagram the reddening for Be 64 and Be 69 is estimated to be ~1.05mag and ~0.65mag respectively. In case of Be 69 the comparison of observational colour-magnitude diagram (CMD) with the standard isochrones of VandenBerg (19855ApJS...58..711V) indicates an apparent discrepancy between the shape of the turnoff and isochrones. The morphological features of the CMDs of Be 69 are better understood in terms of convective overshooting. The comparison of CMDs of both the clusters with the convective overshoot models (Bertelli et al. 1994A&AS..106..275B) produces a good fit for a metallicity Z=0.008 and age =0.8-1.0Gyr. An apparent distance modulus (m-M)=16.2 and 14.3 has been estimated for Be 64 and Be 69, respectively, which corresponds to a distance of 3880+/-480pc and 2860+/-310pc, respectively. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 02 21.1 +65 54 Berkeley 64 = C 0217+656 05 24.6 +32 39 Berkeley 69 = C 0521+326 ----------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2 51 119 Magnitudes and colours of the stars in the field of Be 64 table3n 51 144 Magnitudes and colours of the stars in the field of Be 69, North region table3s 51 144 Magnitudes and colours of the stars in the field of Be 69, South region b64.ps 132 1125 Fig. 1. Identification map for the cluster Be 64 b69.ps 132 1566 Fig. 2. Identification map for the cluster Be 69 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2 table3n table3s -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 I3 --- No Serial Number 5- 11 F7.3 pix Xpos X-coordinate 13- 19 F7.3 pix Ypos Y-Coordinate 21- 26 F6.3 mag Vmag V magnitude 28- 32 F5.3 mag U-B ? U-B color index 33 A1 --- n_U-B [*] No measure (1) 34- 38 F5.3 mag B-V ? B-V color index 39 A1 --- n_B-V [*] No measure (1) 40- 44 F5.3 mag V-I ? V-I color index 45 A1 --- n_V-I [*] No measure (1) 46- 50 F5.3 mag V-R ? V-R color index 51 A1 --- n_V-R [*] No measure (1) -------------------------------------------------------------------------------- Note (1): * indicates that the magnitude in the colour could not be obtained -------------------------------------------------------------------------------- Acknowledgements: A.K. Pandey ================================================================================ (End) Patricia Bauer [CDS] 25-Jul-1996