Access to Astronomical Catalogues

← Click to display the menu
J/A+A/429/607       BV photometry of Berkeley 36, 73 and 34    (Ortolani+, 2005)

The old open clusters Berkeley 36, Berkeley 73 and Biurakan 13 (Berkeley 34). Ortolani S., Bica E., Barbuy B., Zoccali M. <Astron. Astrophys. 429, 607 (2005)> =2005A&A...429..607O
ADC_Keywords: Clusters, open ; Photometry, UBV Keywords: Galaxy: open clusters and associations: individual: Berkeley 36, Berkeley 73, Biurakan 13 - stars: Hertzsprung-Russell (HR) and C-M Abstract: BV photometry of the faint open clusters Berkeley 36, Berkeley 73 and Biurakan 13 are studied. For these clusters no colour-magnitude analyses were previously available. The colour-magnitude Diagrams indicate that they are all old open clusters. The derived ages are ∼4Gyr for Berkeley 36, and ∼2.3Gyr for both Berkeley 73 and Biurakan 13. The clusters are not very reddened, with E(B-V)=0.25, 0.10 and 0.30 respectively for Berkeley 36, Berkeley 73 and Biurakan 13. Berkeley 36 and Berkeley 73 are located at a distance from the Galactic center of 10kpc, while Biurakan 13 is much farther, at 15kpc. A peak in the age distribution appears at 5Gyr suggesting a distinct star forming event in the disk. Description: The observations were carried out on 2000, February 2-5, using the 3.5m Galileo National Telescope operating at La Palma. The instrument is the Galileo Optical Image Camera (OIG) installed at the Nasmyth focus. Objects: --------------------------------------------------------------------- RA (2000) DE Designation(s) (File) --------------------------------------------------------------------- 07 00 23 -00 14 15 Cl Biurakan 13 = Cl Berkeley 34 (table2c.dat) 07 16 23 -13 11 50 Cl Berkeley 36 (table2a.dat) 06 22 05 -06 18 59 Cl Berkeley 73 (table2b.dat) --------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2a.dat 59 1274 B, V photometry for Berkeley 36 table2b.dat 59 367 B, V photometry for Berkeley 73 table2c.dat 59 999 B, V photometry for Biurakan 13
Byte-by-byte Description of file: table2a.dat table2b.dat table2c.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Seq Sequence number, in the cluster 9- 15 F7.2 pix Xpos x pixel coordinate (1) 20- 26 F7.2 pix Ypos y pixel coordinate (1) 30- 37 F8.3 pix Rad radius from cluster center 43- 48 F6.3 mag Vmag V magnitudes 54- 59 F6.3 mag B-V B-V colour index
Note (1): 1 pix = 0.144". North is down and east to the right.
History: Coordinates of Cl Berkeley 73 (09 31 56 -50 13 14) corrected into 06 22 05, -06 18 59 (from erratum 2005A&A...439.1135O) on 11-08-2005 Acknowledgements: Beatriz Barbuy, barbuy(at)astro.iag.usp.br
(End) Patricia Vannier [CDS] 03-Jan-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact