ADC/CDS Standard Document for Catalog:/journal_tables/A+AS/122/111/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
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.
<Astron. Astrophys. Suppl. Ser. 122, 111 (1997)>
=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
table3 51 144 Magnitudes and colours of the stars in the
field of Be 69 (North + South regions)
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 table3
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- No Serial Number (starts by N or S for table3)
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 <pandey@upso.ernet.in>
================================================================================
(End) Patricia Bauer [CDS] 25-Jul-1996