J/A+AS/121/455 BVI photometry of stars in Berkeley 18 (Kaluzny 1997) ================================================================================ CCD Photometry of distant open clusters: III. Berkeley 18. Kaluzny J. =1997A&AS..121..455K (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Photometry, CCD ; Clusters, open Keywords: open clusters and associations: individual: Berkeley 18 - HR diagram Abstract: We present CCD BVI photometry for Berkeley 18, a rich open cluster located in the Galactic anticenter. The cluster age is similar to, or marginally lower than age of M 67. Its distance is estimated at 5.8kpc and the reddening E(B-V) is probably higher than 0.46. Our data indicate that Be 18 is one of the most populous objects in the whole sample of known galactic open clusters. The angular diameter of the cluster is estimated at 26arcmin, which corresponds to a linear size of about 44pc. The horizontal branch of Be 18 exhibits a large width in comparison with other old open clusters. Objects: ---------------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------------- 05 22.2 +45 24 Berkeley 18 = C 0518+453 ---------------------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table3 62 2041 BV photometry of stars from Berkeley 18 field October 91, 2.1-m telescope data table4 81 987 BV photometry of stars from Berkeley 18 field October 92, 2.1-m telescope data table5 81 8255 BV photometry of stars from Berkeley 18 field October 92, 0.9-m telescope data -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3 table4 table5 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 6 I6 --- ID ID number 9- 15 F7.2 pix Xpos X coordinate (1) 17- 24 F8.2 pix Ypos Y coordinate (1) 26- 31 F6.3 mag Vmag V magnitude 34- 38 F5.3 mag e_Vmag rms uncertainty on Vmag 41 I1 --- o_Vmag number of averaged V measurements 43 I1 --- q_Vmag quality flag for Vmag (2) 45- 50 F6.3 mag B-V ? B-V color index 53- 57 F5.3 mag e_B-V ? rms uncertainty on B-V (3) 60 I1 --- o_B-V Number of averaged B measurements 62 I1 --- q_B-V Quality flag for B-V 64- 69 F6.3 mag V-I ? V-I color index 72- 76 F5.3 mag e_V-I ? rms uncertainty on V-I (3) 79 I1 --- o_V-I ? Number of averaged I measurements 81 I1 --- q_V-I ? Quality flag for V-I -------------------------------------------------------------------------------- Note (1): 1 pixel=0.30 arcsec; X axis points toward North; Y axis points toward East Note (2): q=1 means relatively poor quality Note (3): blank means "unknown color" -------------------------------------------------------------------------------- Acknowledgements: Janusz Kaluzny ================================================================================ (End) Patricia Bauer [CDS] 24-Jun-1996